Abstract:To meet the needs of the multi-function and the multi-use of the modern tall buildings, the megastructure systems have been gradually emerged and used in tall buildings in many countries. In this paper, the analytical model and relative analysis method due to vertical seismic action of the megastructure are presented, including the spectrum and time-history analysis. The results of the calculation of an example show that the vertical seismic action on megastructure is remarkable. It reminds us that the vertical seismic action on megastructures can't be neglected in the design of this kind of structures. Furthermore, it is pointed out that the "story model" is not suitable to megastructures in dynamic analysis.

Abstract:In this paper,a shear-deformation nonlinear relationship of single bolted connection subject to shear forces is determined by curve-fitting to experimental data and this nonlinear relationship is directly applied to force-deformation calculation of bolt-group connections subject to shear and bending forces. Elastic-plastic analysis of bolt-group connections subject to shear and bending forces is performed on the basis of ultimate design concept.The analytical results are checked against the experimental results and a satisfactory agreement is obtained.

Abstract:After the second world war pedestrian streets began to be built in European cities, at the age of seventies pedestrian street became very popular in western countries.In the nineties our country started into the planning and construction of pedestrian streets.On the basis of analysing the reasons for the development of pedestrian streets at home and abroad and the typology of pedestrian environment,this paper presents the main points of planning and design of pedestrian space in city center.

Abstract:In this paper, an attempt is made to discuss the wave propagation behavior in saturated porous media with the decomposition of the motion equations. And it is denoted that there are two types of dilatational waves and one rotational wave. Also, the motion equations of the different waves are obtained, and the wave velocities in some special cases are calculated, from which it is concluded that permeability of media greatly affect wave propagation behavior.

Abstract:On the basis of summarizing the evolution of ecological ideas in constructing cities,the concept, essences and characteristics of an ecopolis are explored,and the conclusion is drawn that constructing an ecopolis would be a historical tendency.

Abstract:Atmospheric scattering directional exponetional function is very important to study of the distribution of skies luminance.The influence of air turbidity factor to atmospheric scattering directional exponetional function was neglected previously.In this paper,influence of air turbidity factor on atmospheric scattering was considered and a scattering function,which proximates clear,cloudy and pseud-overcast by varied turbidity factors,was presented.The atmospheric scattering for varied air condition was considered and molecular scattering was included in the function.Hence it provides a path for further theoretical study on sky luminance distribution.

Abstract:A test method of post-tensioned prestressed concrete continuous beam is presented in this paper.In the test,the prestressed secondary moment is established by adjusting middle support height.The prestressed concrete continuous beam built by the method is equivalent to the beam in practice.

Abstract:Based on analyzing and calculating the hydraulic and thermodynamic disorder in two_pipe hot water heating system,it states that this system can be used in highrise or multi_storeyed buildings after correction for the area of radiators. The equations and data of the correction factor are given.

Abstract:污泥处置是一个引入注目的问题，本文就区盟及其成员国的污泥产量，质量，污泥处置方式的现状及可能的发展趋势进行了综述与讨论。

Abstract:Combined with some engineering experiences,this paper primarily estabishes computer calculating models of simulating building thermal process and load estimation index,with orthogonal testing ways and square error analysis,and lays a foundation for researching the air_conditioning load property of office building by way of all_sidely investigating and analysing numerous factors of the building air_conditioning cooling load.Some experimental formulas are given finally.

Abstract:With reference to the characteristics of urban road under the World Bank's loan construction project,this paper proposes the contents of post_evaluation of urban road project and gives its process evaluation,national economy evaluation,influence evaluation and sustainability evaluation.Based on the theoretical principles,a project post_evaluation of inner_ring road in T city was conducted.

Abstract:The authors have fabricated long persistence phosphors rapidly by combustion method at a comparatively lower temperature range.This process goes quickly and the loose resultants with small hardness and tiny particles have been obtained,which is important for the phosphor's utilization.

Abstract:The fluctuation of interest rate may affect the market of real estate.In Oct. l997,the central bank declared the interest rate reduction.This will promote the investment in the field of real estate,on the other hand,the developers' interest burden will be reduced as well.Thus,the cost of building will be declined and its price also will fall.At present,if we want to stir the real estate market,the overstocked buildings must be sold .The decline of interest rate makes the goal possible to reach.

Abstract:It is an important subject to solve numerically the problems of anisotropic unsteady seepage flow.This paper presents a numerical method for computing the anisotropic_orthotropic unsteady seepage flow with BEM.The paper introduces the so_called boundary_only technique to solve time dependent problem.The Volume domain integral is voided by using the Green formula again.Several numerical examples are presented.

Abstract:The method of structural damage assessment based on changes in eigenvalues has some defects.Therefore,this paper presents a method of damage assessment of frame structures based on changes in mode.The adaptability and efficiency of this method are discussed through computation simulation.The results indicate that this method is feasible.

Abstract:针对近年来城市建设高潮时期所产生的“特色危机”，力图在结合西方现代生态学，景观科学与中国传统文化及审美情趣的基础上，探寻自然美与人文美并重的现代化山水城市的塑造方式，并着重阐释了山水景观的特征及其在城市场景中的表现手段，以期对现代山水城市的塑料产生积极的影响。

Abstract:This paper introduces the methods of reducing and controlling differential settlement by changing the length and load_bearing capacity of the piles,and other means,rather than setting settlement gaps between the main building and the podium structure.By using these methods,the size of differential settlement observed is only 1mm.Because of the building with a tower 45m high,the earthquake magnification factor is taken as 3 with considering whiplash effect.

Abstract:以减少存储空间消耗为主要目标，讨论逻辑程序设计的结构优化，分析了程序基本结构及其优化方法，提出了一种强制失败－数据旁路结构，作为已有优化方法的补充。由此综合出一种全局结构优化模式，用于机器翻译试验工作，效果显著。

Abstract:Utilizing the local materials in Chongqing,employing the techniques concrete of modified extra fine sand with three additives, we have conducted a cross experiment design test on multi-factors.ln addition, in combination with the routine production procedures in ready-mixed pumping concrete, C60 high-performance concrete has been produced.Through the practical application in engineering projects,a conclusion canbe drawn that C60 high-performance concrete consisting of modified extra fine sand is of great value in its spreading and popularization.

Abstract:According to own experience in designing and operating two huge reservoirs, in this paper the questions are primarily discussed about the desinging principles and construction methods, and It is hoped that it can bring into effect for the similar engineering practice.