Abstract:

Abstract:With the comprehensive development of green buildings, the evaluation system for domestic green industrial building is gradually established. By comparing the British BREEAM industrial and domestic standards green industrial building evaluation guide, after deep analyses from different views such as the weight system, evaluation process, the article obtains the similarities and the differences between the BREEAM and guide, and puts forward the viewpoint of weight system of evaluation system of domestic green industrial buildings.

Abstract:Chinese mainland has seen a rapid construction speed of super tall buildings in recent years. Due to its huge quantity material and energy assumption, the super tall buildings exert great impact on the environment. An innovative new life cycle model is proposed for assess and optimize the life cycle environmental cost of super tall buildings. The new life cycle model has two features. Firstly the space distribution of the building materials is considered besides the time dimension, and secondly the single life cycle concept is extended to multiple life cycles to investigate the carbon footprint from the perspective of more than one life cycle. A benchmark super tall building is established to illustrate the application of the proposed new life cycle model. According to the case study results, a remarkable difference would be made in carbon emissions if the life cycle environmental cost based structural optimization method could be applied.

Abstract:The mechnical characteristics of concrete is sensitive to the strain rate and it is crucial to consider the effect of load rates on the behavior of reinforced concrete (RC) structures subjected to dynamic loads such as severe earthquakes. In this study, numerical simulations on the dynamic behavior of typical RC column specimens under dynamic loadings with different load rates were performed. Concrete constitutive model considering the strain rate effects proposed by the CEB code was employed with a fiber model to characterize the nonlinear strain rate dependent behavior of RC columns. The developed dynamic fiber element model was validated by comparing the simulated results of four RC column specimens with the fast loading test results. Results show that the developed fiber element model can predict the behavior of RC columns with acceptable accuracy. After valiating the proposed fiber elemen model considering the strain rate effect, the load carrying capacity of different RC columns with various longitudinal reinforcement ratios and volumetric stirrup ratios were simulated. Results show that the trends of the influences of longitudinal reinforcement ratios and volumetric stirrup ratios on the load carrying capacity of the RC columns under dynamic loadings are different.

Abstract:The research object is indoor natural convection heat transfer under different heat source location,using FVM numerical method to dispersed solving for mass conservation equation and energy conservation equation.Researched distribution of streamline and isotherm and variation of Nu in powerhouse with Ra among 10 3~10 6 when different heat source location.The results of analysis indicate that when Ra=10 3, the isotherms expand outward centring on the heat source and present shapely arcuation.When increasing Ra,isotherm shape changes gradually,thin boundary layers appear on cold wall and hot wall.The streamlines are two symmetrically reverse vortexs.As increasing Ra, the vortexs change in size and move. As Ra=10 3,Nu reaches maximum in the case of D=0. the effect of heat source location on heat transfer quantity is obvious.The curve of Nu is steepest when D=0.5 and smoothest.There is a power relationship between Nu and Ra, the linear correlation fitting 90%.The conclusion provides a theory basis for the research of complex indoor heat transfer mechanism.

Abstract:Ru tu wei an (burial pacifies the deceased)” and “tian ren he yi (harmony unifies man and nature)” are traditional Chinese views on life and death. Death serves as another existence of life, and it does not terminate relations between the living and the dead. Funeral ceremony and tomb sweeping play a most important role of extending relations between the living and the deceased. However, driven by interest, modern cemetery considers less emotional factors in its development, which in consequence transfers tomb sweeping into a passive acceptance from an active participation, and impedes the continuation and development of traditional Chinese culture. This paper lies out around the core of how to generate tomb sweeping: it clarifies that the affection regeneration of cemetery is the key element to motivate tomb sweeping; summaries the passive influence of inadequate cemetery affection and five categories of modern cemetery’s affection inadequateness; and puts forward five strategies on the affection regeneration of modern cemetery.

Abstract:Low-carbon building is within building’s lifecycle, through carbon source reduction and carbon sink addition during the process of plan, design, construction, operation, demolition and recycle to achieve the optimization of building lifecycle carbon performance. This article takes the case of Low-carbon Building Evaluation Standard of Chongqing to briefly introduce low-carbon building evaluation indexes, also by comparing with the Green Building Evaluation Standard of Chongqing to identify the two index system’s differences and similarities. Through comparison analysis it is discovered that green building evaluation index system focus more on basic resource and energy consumption status as well as the environment quality delivered, where as low-carbon building evaluation index system put more emphasis on detailed resource and energy consumption status and carbon performance.

Abstract:Taking the effect of industrial workshop’s aspect ratio on indoor temperature distribution as research object,using finite volume numerical method to dispersed solving for mass conservation equation and energy conservation equation.This paper research distribution of streamline and isotherm and variation of Nu in industrial workshop of different aspect ratio with Ra among 10 3~10 6.The results of analysis indicate that when increasing Ra,heat transmission form turns heat conduction into convection heat transfer,the isotherms change from vertical to horizontal gradually.The indoor streamlines form two vortexes around the model boundary,the vortexes are broken up with Ra.It’s separated into two vortexes when B=0.5 or B=1.And it’s separated into three vortexes when B=3 or B=2 with slight turbulent state. Nu increases with the increase of Ra and the related curve presents power exponent.when B=3 Nu is the largest and indicate that the total quantity of heat transfer at most by high temperature wall face cold wall.

Abstract:Accurate obtainting soil parameters of landslide is the key links for landslide stability evaluation and project management . This article takes Shennv Stream landslide in Chongqing Wushan County as an example, implementing unconsolidated and undrained shear test and mineral composition analysis by X ray diffraction for soil in different elevations of landslide ,conducting sensitivity test for various soil parameters of reservoir landslide change with different water level.Study shows that : Mineral composition of soil mainly contains Calcite, Quartz and clay mineral. Hydrophilic minerals in clay mineral have great effect on stability of landslide. Shear strength decreases by influence of water content on cohesion. Cohesion decreases sharply in a quadratic function relation with water content increasing .When water content comes to 18.21% ,change of cohesion tends to be stable.But the internal friction angle of landslide soil decreases linearly in small amplitude with an increase of water content. Research results may provide some important references for rationally choosing strength parameters of soil in similar landslide.

Abstract:High-strength concrete has been widely used in civil structures for advantages of higher-strength, earlier curing strength and smaller deformation in applications. However, relatively weak ductility in structures in seismic zones prevented it from further application. The ductility of the structure can be improved by reinforcing reasonably rebars in correct details. A high strength RC frame model with twelve floors and two bays is numerically analyzed by using DRAIN-2DX program. It was shown that this worked fairly well in simulation of the process of structural damage and energy dissipation capacity. It also showed that this kind of frame structure has good ductility and dissipation capacity as well as great seismic performance. The proposed method can be applied in high-strength concrete structures in seismic zone.

Abstract:Super-tall building structures have the features of complex structural systems, diverse structural functions, long service life, massive investment and fixed owners. The life-cycle cost of super-tall building structures mainly contains initial cost, maintenance cost, failure cost caused by hazard and demolition cost. In order to achieve the minimization of the life-cycle cost of the super-tall building structure, a multi-dimensional life cycle economic cost assessment method is proposed in this study. The proposed method considers alternative design schemes, structural components and cost items. The overall cost management and optimization will be done at the initial phase of the structural project if this method can be employed. The proposed method is applied to a super tall building to illustrate its effectiveness and applicability.

Abstract:This text expounds the necessity and importance of small communication space development, comes up with essentials of small space landscape design aiming at some problems arising in human communication, and seeks composition forms of landscape design appropriate for communication, thereby solving conflicts among man, city and nature brought by rapid urban development and working out reasonable and effective means of communication for urban residents.

Abstract:Passive building energy efficiency refers to utilizing ecological building design principles with natural climate resources to realize building energy efficiency, which is greener, more conducive to the sustainable development of the human living environment, and will actively advocate building energy efficiency. The adaptability of six passive building energy efficiency technologies including passive solar heating, natural ventilation, thermal storage wall, induced and night ventilation, direct evaporative cooling and indirect evaporative cooling in typical cities in selected climatic regions would be analysed. In addition, the applicability of passive building energy efficiency technologies in selected climatic regions would be compared.

Abstract:This paper aims at providing a basic state-of-the-art of standards and guidelines, as well as laboratory and field studies dealing with whole-body vibration perception thresholds, and comparative analysis is given. Mechanisms of vibration perception, absolute thresholds of perception, difference thresholds and descriptors are introduced. The effects of frequency, posture, direction, duration, gender, age and noise on whole-body vibration perception thresholds are reviewed. And the problems requiring further investigation are proposed.

Abstract:Aimed at the problem of the in partial section of the Nanjing Metro Line 3, the three-dimensional pattern of tunnel, segment and pile foundation was established after appropriate simplification. The simulation results showed that, the Overpass pile foundation of Shield Tunneling to Adjacent Metro Shield Tunnel will have effect on the force and deformation of the earth's surface and pile foundation, the maximum deformation value of the earth's surface is larger than that of the pile foundation top, stress concentration appeared in right working slope lower side segment of tunnel. Through the comparison with field monitoring results, the field dates is consistent with the Numerical Simulation Results, the execution parameters are advised to be well controlled in the further construction, in the same time strengthing the track monitoring, tracking grouting reinforcement should be carried when necessary. The research results could provide reference for the smooth going of the project.

Abstract:The Safety Netting Systems has developed products for geotechnical protection works abroad. This article focuses on the concept of The Safety Netting Systems, types, working principle and performance. The Safety Netting Systems has a simple, technologically advanced, safe, reliable, economical and reasonable. The system has been applied in the part of the highway construction. This article discusses the prospects of its application in the highway construction.

Abstract:Under the conditions that HRT is 4d without any measures to strengthen the system, after adding enhanced phosphorus removal materials,the system effluent TP removal efficiency increased by an average of about 8.36%; he system total nitrogen concentration with the flow direction of the wetlands has shown a downward trend, the concentration of ammonia nitrogen in the system in addition to hydrolysis at the second point is the point to increase the pool of water , the rest remain the same as the concentration of TN system flow direction showing a downward trend; the concentration of organic matter in sewage along the flow direction showing adecreasing trend, the first and the second paragraph of wetlands plays a major role to removal the concentration of organic matter, in addition to amount of 72.78% removal of total organic matter concentration.

Abstract:A complex nonlinear rheological mechanical behavior of rocks is discussed。Based on Peirc’s Scale factor, a nonlinear elasto-viscoplastic constitutive model is proposed; meanwhile stress return algorithm and consistent tangent modulus are derived. According to the UMAT interface requirement of ABAQUS, the corresponding UMAT codes are programmed. The numerical test results show that the establishment of nonlinear elasto-viscoplastic rheological model can uniformly describe creep process under different stress states，which demonstrate the extensive adaptability of the model. Using the nonlinear elasto-viscoplastic constitutive model，the rheological numerical analysis is applied to rock tunnel, the variation with time of the tunnel crown settlement and contact pressure are obtained. These results indicate that the developed model is correct and reliable，and will have good application prospects.

Abstract:Dangerous mountain construction projects block of high and steep slope stability is the important issue of security and disaster prevention, investigation on the surface of the dangerous mountain high and steep slope rock mass structure is the key to the analysis of the problem. The high slope of a major project of the Lancang River, the application of 3D laser scanning technique to study the long-distance survey analysis of rock mass structure analysis method to analyze the distribution of the surface space of the high and steep slope rock mass structure, statistical analysis direction of the advantages of the structure surface and the distribution of rock blocks, as the basis for the application of limit equilibrium analysis method to study the stability of rock blocks of the high and steep slope.

Abstract:Intermittent operation can affect the heat exchange performance of the vertical ground source heat pump system, thereby affecting life cycle cost (LCC) of the ground source heat pump system. The simulation analysis on the hourly load of an office building is implemented by using the DeST software.The heat exchange model of vertical ground heat exchanger pipe-group and energy consumption model of per part of heat pump system are established. Through the comparison between calculation results of continuous operation for 15 years and calculation results of intermittent operation 15 years of the heat pump system, it can be concluded that the LCC value of intermittent operation decreased by 13.45%,relative to the LCC value of continuous operation, and the average energy saving rate of intermittent operation mode is 17.20% in the entire life cycle. Intermittent operation mode can effectively improve energy efficiency of the ground source heat pump system and reduce the LCC value.

Abstract:To identify distribution and development of coast erosion in Liaodong bay, erosion situations of typical coastal zone are studied on the basis of field investigation data. The results show that according to erosion landform features, coast erosion in Liaodong bay can be divided into five patterns: washing and abrasion type, wave collapse type, block avalanche type, karst depression type, interface slip type; according to degree of corrosion and siltation, coast erosion in Liaodong bay can be divided into five grades: serious erosion, intensive erosion, erosion, micro-erosion, stability. Sandy coast is eroded mainly in wave collapse type, rocky coast is eroded mainly in block avalanche type and karst depression type, and silty mud coast is eroded mainly in washing and abrasion type. Investigation on disease pattern and grade distribution of coast erosion is helpful to prevention of coastal zone in Liaodong bay.

Abstract:A one-dimensional diffusion model was developed to investigate contaminant distributions in unsaturated soils beneath a landfill. On the basis of the assumption that the volume water content is a linear function of depth, the analytical solution of the model was obtained by using the method of separation of variables combined with generalized orthogonal theory. The results obtained by the proposed analytical solution agree well with those obtained by the finite element software COMSOL Multiphysics 4.2. The proposed analytical solution can be degraded to the steady-state solution. When the maximum volume water content of 0.6 and minimum volume water content of 0.3 is assumed for an unsaturated soil, the 100-year contaminant flux at the bottom of unsaturated soil was 91 g/ha/a, which is 1.4 times greater than that of the case assuming porosity of 0.3 for the saturated and 0.7 times less than that with a saturated volume water content of 0.6. When the sum of the top and bottom volume water content of the unsaturated soil remains constant, the relative concentration at the bottom of the soil will decrease with increase of the volume water content at the top of the soil. The bottom contaminant flux was not greatly affected by the variation of the distribution of volume water content when the sum of the top and bottom volume water content remains constant. The proposed analytical solution is relatively simple, and can be used for verification of complicated numerical models, experimental data fitting, and preliminary design of landfill liner systems.

Abstract:To estimate the building load Based on the number of customers and stay, a new model was built with the Adaptive Neuro-Fuzzy Inference System (ANFIS) to research its feasibility and applicability. With the average error and the coefficient of multiple determinations estimating performance of the model, ultimate results showed the ANFIS model is very valid, and the accuracy rate is 99.8%. Therefore it can realize regulating and controlling compartment loads according to the number of customers and stay for market buildings. Comparing to traditional temperature and humidity control of the entire space to adjust to the change of the load, the new method can rapidly change the local environment to meet the requirements of customer comfort, and fully realize energy conservation.

Abstract:The adsorption capacity and release behavior of sulfamethoxazole (SMZ) were determined on three types of activated carbon: AC-0 (commercial activated carbon), AC-Fe (activated carbon/iron oxide composites) and AC-Mn (activated carbon/manganese oxide composites). The adsorption fitted to the Freundlich, Langmuir and Langmuir-Freundlich models. The Langmuir-Freundlich model had been found most suitable for equilibrium data. The presence of iron oxide and manganese oxide did not significantly affect the surface area or pore structure of activated carbon, in addition, which had little effect on the adsorption capacity of activated carbon. Compared to AC-Fe and AC-Mn, AC-0 had a higher efficiency of SMZ desorption. Adsorption probably occurred through a surface complexation mechanism and was accompanied by degradation of some SMZ, which would play significant role in improving the ability of AC-Fe and AC-Mn adsorbing SMZ.

Abstract:The basic idea of structure identification is that the changing of structural actual physical state will affect the dynamic responses of the structural degrees of freedom, so we can reversely indentify the actual state based on the dynamic properties of the structure. Therefore, as a typical inverse problem, parameter inversion is received extensive research. In this paper, to achieve structural parameter identification based on regularization method by the dynamic characteristics (natural frequencies and modes).

Abstract:Aiming at the problems existed in public buildings, such as high energy consumption, heavy pollution and inefficient management, a novel global optimization technique was presented, named SGB (Smart Green Building) technique, in which wire and wireless hybrid sensor network is used to realize operating data monitor of the building. At the same time, the collected data is divided into information flow, energy flow, material flow and people flow, and is processed stratified, so as to achieve the existing buildings reform of energy saving, emission reduction and efficient management, to meet the requirement of green and intelligent. The critical factor of the technique is to deal with the operating public building as an entirety, and do the system-level optimization.

Abstract:Experiment study about the effect of different admixture on drying shrinkage of alkali-activated slag mortar. The results show that shrinkage reducing agent has some inhibit effect for the drying shrinkage of alkali-activated slag mortar. However, air entraining agent, Na2SO4and Ca(OH)2 made the drying shrinkage of alkali-activated slag mortar growth.

Abstract:Ventilation design is the difficulty of transformer room design. Temperature field and velocity field in a transformer room was simulated by CFD method . By comparing simulation value with the experimental value in related document , the effectiveness of the mathematical model was verified. Based on it, an indoor substation transformer built was taken as the simulation object, then designed and simulated six kinds of ventilation condition by changing the location and area of air inlet, focused on the influence of air inlet on the ventilation effect by comparing the temperature field ,velocity field and temperature characteristic value in different condition. The simulation results show that when air inlet area is fixed, the air inlet should be arranged in the radiator side and its center height should be controlled in the radiator center height or slightly offset position, it should not be higher than the radiator. When the air inlet location is fixed, air inlet area should be increased along the high direction to improve ventilation effect. The conclusions can provide technical support for the ventilation design of transformer room.

Abstract:Structure security is the most main structural reliability, at the request of active service in time to make a frame structure security assessment, in safe premise to prolong the service life, and has a certain social significance and economic benefits. Combining with the actual situation reconstruction projects, using the theory analysis frame structure of the active safety, the finite element SAP2000 on the original structure and rebuilt structure modal analysis, the effect of the structure security index that contrast reconstruction of the frame structure than the frame structure of the security it can improve.

Abstract:Vacuum-surcharge combined preloading method have been become the most commonly used method on the dredger fill and saturated soft clay soil consolidation beside the coast.The long time of consolidation is one of this method’s most characteristics,as we always think that 3 months is the academic time.In fact,we always can’t accomplish the consolidation of siaturated soft clay soil by using vacuum-surcharge combined preloading method in 3 months because of the complex nature of the soil horizon and the effects of the construction technology.The mian mission of the article is to supply a substantial time and a reliable basis that are needed by the vacuum-surcharge combined preloading method and the construction period.The mian data sources are come from the ground treatment project of a cogeneration power plant in Zhuhai Guangzhou.We adopt the exponential curve fitting method and the method of Asaoka to count the degree of consolidation of the saturated soft clay soil.

Abstract:Characteristics of smoke movement and smoke control in a shaft is a serious issue that closely related to the fire safety of high-rise building. This paper talks about the studies on the characteristics of smoke movement in a shaft of high-rise building from three aspects: the factors which influence smoke movement in a shaft, the distribution of smoke parameters and the upward velocity of smoke flow. Smoke control methods which are commonly used and the problems in engineering practice are summarized. Some methods thoughts are given to improve the efficiency of smoke control.

Abstract:The steel fame-concrete core wall combination of structural system is outside the framework with steel inner cylinder with concrete shear wall, steel frame-concrete inside the tube system. In this paper ,the finite element software ANSYS earthquake seismic response analysis and stability analysis, the 25-story steel frame-concrete core wall combination of structural system data results show that the structural system performance than the purity steel framework structure is superior.

Abstract:In this study we carried out field studies in two office buildings in Shanghai, China to investigate the effects of indoor environmental quality on human productivity. The overall perception of occupants on indoor climate (including thermal sensation, perceived air quality, and perceived noise etc.), the influence of human factors and indoor climate factors on productivity, as well as their sick building syndrome (SBS) symptoms were assessed with subjective questionnaires. The building operating cost and employee’s salaries were record objectively. Meanwhile the indoor air temperature, humidity, air velocity, noise, concentration of formaldehyde and carbon dioxide were measured. The results indicate that about 50% occupants complained SBS symptoms when exposed to their office. Most occupants require to increase fresh air and lower the indoor noise level (especially for open-plan office), even though the physical parameters meet the requirement of standards. Thermal environment, indoor air quality and noise assessed to be the three main indoor climate factors that affect human productivity. The employee’s salaries were over 100 times of the electrical energy cost in this two buildings, which indicate great financial benefit can be achieved in China to increase occupants’ productivity by improving the indoor climate.

Abstract:Bridge surface roughness is usually considered to be the main Influencing factors of vehicle-bridge coupled vibrations.The way that obtaine Bridge surface roughness by the transformation of power spectral density is effective and rapid.The Bridge surface roughness is obtained by Fourier inverse transform method and trigonometric series method respectively. It can be concluded from the comparision that the precision of Fourier inverse transform method is higher than trigonometric series method. The vibration functions for 4-dofs Vehicle and bridge were derived with the employment of d'Alembert principle and computational procedures for vehicle-bridge coupled vibration were compiled. The dynamic response of a simply supported beam and vehicle was analyzed considering bridge surface roughness which was obtained by Fourier inverse transform method.The research shows that the influence due to the bridge surface roughness is significiant and vehicle speed also effects the bridge vibrations by changing the frequency of the force acting on the bridge due to vehicle and the force acting on the vehicle due to bridge deformation.

Abstract:The gas-solid two-phase flow characteristics of fine particles in the filter media were simulated based on CFD-DEM (Discrete Element Method) in this study, and the particle group, particle size distribution, and the rebound effect between particles, particle and fiber were taken into account the calculations. Additionally, the movement characteristics of the particle group and the deposition form of the fine particles in the fibrous filtration were analyzed. The results indicate that it is convenient and feasible to simulate the filtration process of the filter media as well as the deposition process and form of the fine particle on the media surface using CFD-DEM, and the simulation results are consistent with the experimental observations in the literature. The surface filtration has larger contribution to the filtration process, and most of the particles are captured by the media surface. Meanwhile, parts of smaller particles that enter into the media are captured by the depth filtration. A larger number of particles are collected by the particle-particle capture mechanism. The filtration efficiencies of the filter media are varied with the particle systems, and for the model of the filter media in this study, the filtration efficiency of the multi-particle system is about 20% higher than that of the single-particle one.

Abstract:From the statistical data is not difficult to find, the growth of construction industry has been falling, construction industry of the labor productivity and the rate of technical equipment is slow-moving. It shows that the Construction Industry is still in Ruggedly management mode in many areas, lacking of technological innovation. Therefore, the paper evaluate the technology innovation ability in construction industry in 31 provinces and cites of China using factor analysis, get the current status and find the difference, to find solutions for promote the technology innovation ability in construction industry.

Abstract:The moisture content of filling has a major impact on the soil shear strength parameters, which thereby affects the calculation of earth pressure and then influences the stability of the retaining walls. This article studies on the basis of the previous studies, which is about the influence of the moisture content to shear strength parameters of the unsaturated filling. By having shear tests of soil samples with ZJ type direct shear apparatus and combining with relevant knowledge of the strength theory, shear strength parameters C and φ are obtained. Then the experimental results are given numerical simulations to determine the influence coefficients of the affect of moisture content to C and φ, and are used to get the relation formulas of moisture-cohesion, moisture content-internal friction angle with good goodness of fit.When soil samples are given the pressure experiments by using universal testing machine,the soil particle size distribution and the density of filling are basically consistent, and only change the moisture content of filling to study the influence of fillings of different moisture contents to the performance of retaining walls. In the experiments, it can be found that with the pressure increasing, the compressibility and the moisture content of the filling show a nonlinear relationship. At first the compressibility increases with the increases of moisture content , and then decreases when the moisture content reaches a certain value. By the end of the experimn, according to Rankine's earth pressure theory , the earth pressures of retaining walls are calculated corresponding to a variety of filling state, and the relation formulas of the moisture content-active earth pressure, moisture content-passive earth pressure are getting by the use of numerical simulations to the results.

Abstract:Earthquakes for the loss of life and property to people is immeasurable. Want to reduce such losses, on the one hand we hope that Government departments can forecast and notify you in a timely manner, on the other hand we need to develop anti-seismic structure of the building, reducing losses when the earthquake happened. Interlayer seismic isolation frame structure is the latest development of a seismic isolation structure.It compared with the ordinary seismic structural damping performance is better, had a large advantage.

Abstract:The concrete structure has been used in low and ultra-low temperature environment. But few researches are experienced on its properties under freeze-thaw recycles with ultra-low temperature. Based on the standard for test methods of long-term performance and durability of ordinary concrete, considering the influence of the times and minimum temperature of recycles, water-cement ratio and the external environment humidity, compressive and tensile strength of cubic concrete and scanning electron microscopy on the residual sample are experimented to explore the impact of freezing and thawing cycles under ultra-low temperature on its strength and microstructure. The results show that the role of cryogenic temperature for freeze-thaw cycles has a greater effect on concrete performance. With the temperature decreasing and water-cement ratio increasing, the damage tends to grow up. Consistent with the results of the strength tests, electron microscopy tests show that the pore size of mortar increases and the material becomes looser.

Abstract:In allusion to waste and irregularity emissions of the condensate water of split air-conditioner,with the actual energy saving potential to recycle the condensate water use for precool the inlet air of condenser, the author by means of make a device to recycle and precool the condensate water, then apply this device to split air-conditioner of a laboratory, and experiments are conducted. The computation and analysis results showed that before and after equipped with the precooled device, COP of the conditioner increasing 12.94% and 9.52% respectively under the conditions which applying sufficient cold water or produced condensate water by itself. Meanwhile, a certain gap of quantity between the produced condensate water and the cool water demanded was discovered, the former only account to 56.26% of the latter. In the end, combine the experiment condition and results to give some corresponding suggestions so as to the application and popularization of the precooled device.

Abstract:Micro-surfacing mix has been wildly used in the pavement maintenance for its water proofing, anti-skidding and wear resistance. However, micro-surfacing pavement has higher noise than the common asphalt pavement and its noise can not be measured effectively and accurately. Therefore, the indoor noise test method of micro-surfacing mix based on wet track abrasion test was explored. The micro-surfacing mix specimens were used to imitate the micro-surfacing pavement. The wet track abrasion tester was used to provide the vehicle loads. The sound level meter was used to measure the noise between tire and pavement. Furthermore, the indoor noise of nine kinds of micro-surfacing mixes with different gradation was examined. The results show that the equivalent sound level in the second time period has good relationship with the surface texture depth by sad patch method. Then the test method and test procedure for the indoor noise of micro-surfacing mix based on wet track abrasion test were given. Finally, two micro-surfacing mixtures with different gradations were made to validate the test method. The results show that the evaluation method can effectively distinguish the difference of micro-surfacing mixes with different gradation and can supplement the mix design method of micro-surfacing mixes.

Abstract:In China Poplar wood-based panels mainly are used in non-structural field, but in the mechanical and electrical packaging industry use a lot of wood as a packaging material. Considering economic cost, resource utilization and environmental protection, an urgent need is for structural wood-based panels instead of wood as a mechanical and electrical packaging material. Shear Modulus for thick laminated veneer lumber in-plane is studied in this study, giving theoretically deduced and actual test to use the theory to guide practice. The purpose is to build a technology base of structural design, performance testing and use of laminated veneer lumber.

Abstract:Based on OpenSEES platform, elastic-plastic structural model of long-span bridge with high piers is established. This paper utilizes time-history analysis method to analyze seismic responses of bridge under consistent or multi-support seismic excitation. Seismic performances and failure process for bridge with high piers are studied. Analysis results show that characteristics of seismic excitation and the way of excitation input have some effect on failure sequence and the occurrence or location of plastic hinge for bridge piers. The failure mode for high piers assumes bending failure, and the failure for top of pier is frequently prior to that of pier bottom, which should be paid enough attention.