Jian Bin Huang Yin Wang Zhenglin
1998, 20(4):1-7. DOI: 10.11835/j.issn.1674-4764.1998.04.001
Abstract:A varying rigidity method is simple,convenient and accurate in analysing the statically indeterminate prestressed structures.The results from this method are verified by a series of large scale experiments.
1998, 20(4):9-13. DOI: 10.11835/j.issn.1674-4764.1998.04.002
Abstract:研制成功了性能优良,价格低廉的新型碱矿渣水泥,在大量试验基础上确定了该水泥的最佳配方,水沁标号达到425#及525#。
1998, 20(4):14-20. DOI: 10.11835/j.issn.1674-4764.1998.04.003
Abstract:Based on the extensive study of various iterative methods, a simple but practical way of the iterative route search and acceleration is introduced into the normal displacement and arc-length methods to fit the nonlinear full-range analysis of concrete structures, by which the convergence of iteration is much improved.
Li Hui Zhong Shusheng Huang Wen Zhou Zhongyuan
1998, 20(4):21-26. DOI: 10.11835/j.issn.1674-4764.1998.04.004
Abstract:A long term measuring method for steel strains in complex construction surroundings which involves multi_storey,multi_measuring points and long distance etc.is expounded in detail.The main factors affecting the long term strain measurement are analysed and corresponding technical measures are proposed.The conclusions given in the present paper is significant for the quality monitor in process of construction and service of highrise buildings of new structural systems.
1998, 20(4):27-34110. DOI: 10.11835/j.issn.1674-4764.1998.04.005
Abstract:根据框架结构的塑性铰形成机理,将传统的梁柱法与有限元单元法相结合建立了梁柱简化塑性区单元模式大位移量刚度矩阵。
1998, 20(4):35. DOI: 10.11835/j.issn.1674-4764.1998.04.006
Abstract:China has a large population of 1.2 billion.To solve the housing problem of middle_low income families and realize a condition,under which people can live in peace and work contentedly,a policy housing financial system(PHFS)with Chinese characteristics must be established.PHFS is a special financial area.The combination of financial relationships,forms and methods related to the purchase,construction or rehabilitation of housing for middle_low income families,is the core of policy housing financial system.It has real meaning for studying theory and practice of PHFS,its role in development of housing industry,and promoting economic growth of the country,civilization and progress of the society.
Liang Renjie Peng Wei Yao Shusen
1998, 20(4):41-46. DOI: 10.11835/j.issn.1674-4764.1998.04.007
Abstract:This thesis presents a new method of processing copper_bearing wastewater. The humic acid type water purifier, in form of particles, is manufactured from weathered coal of Nantong Mining Area in Chongqing. Through static test, the optimum condition on treating copper-bearing waste water has been found out. Then the washing water for copper plating, which contains Cu2+ 124 mg.L-1, is treated by dynamic test. When the concentration of Cu2+ in the outlet water is lower than the national standard for draining (1.0 mg.L-1), the working capacity of absorption is 32.4 mg.L-1 and the saturation capacity of absorption is 45.8 mg.L-1.
1998, 20(4):47. DOI: 10.11835/j.issn.1674-4764.1998.04.008
Abstract:In this paper,the author describes how to develop optimum glass cutting patterns in the construction industry to get higher percentage of material use.The method for designing the software is presented briefly and an example is given to illustrate the optimum cutting patterns developed by the software.
He Shuiyuan Deng Anfu Zhang Jianhui
1998, 20(4):51-57. DOI: 10.11835/j.issn.1674-4764.1998.04.009
Abstract:On the basis of discussing present situation for classification of rock masses and necessity of building expert system of rock masses.The intelligent design software for classification of rock masses CRES has been completed. In this paper the CRES is expounded systematically in the following,such as knowledge_base,data_base,reasoning machine,learning machine,and so on.Finally,the CRES is used for verifying 30 engineering examples and is used to classify rock masses of two roadways successfully .The CRES has been connected to SBSDES.
Wang Cheng Zhang Jianhui Deng Anfu
1998, 20(4):58-63. DOI: 10.11835/j.issn.1674-4764.1998.04.010
Abstract:In this paper the problem of collinear multi-joint in rockmass loaded by shearing-compressive stresses is simplified as that of a joint in finite rockmass. The basic equations with Mohr-Coulomb criterion are solved by the line field analysis method near the joint line in an elastic-perfectly plastic materials. Through a reasonable boundary condition on the joint surface and matching conditions at the elastic-plastic boundary, the relation between length of the plastic region on the joint line and the shearing-compressive stresses is obtained. The failure laws of the rockmass contained collinear joints are also obtained.
1998, 20(4):64-67. DOI: 10.11835/j.issn.1674-4764.1998.04.011
Abstract:This paper sums up the main types of church on the background of Christian history.
Li Ming Zhu Yongjiang Wang Zhengling
1998, 20(4):73-77105. DOI: 10.11835/j.issn.1674-4764.1998.04.013
Abstract:In this paper ,21 pieces of ribbed rebar 16 in diameter,45 pieces of smooth circle rebar 12 and 8 in diameter and 24 pieces of high strength carbon steel wire s5 in diameter are tested on mechanical behaviors under high temperature.The laws of variation of mechanical behaviors with the temperature are investigated for prestressed steel and non_prestressed steel.The conclusions obtained in this paper are significant for research of the loading capacity of reinforced concrete members under the condition of fire catastrophe.
1998, 20(4):78-81. DOI: 10.11835/j.issn.1674-4764.1998.04.014
Abstract:According to the theoretical analysis of energy saving effectiveness of gas instantaneous water heater with condensation, the relationship between heat efficiency and flue temperature of natural gas instantaneous water heater with condensation has been obtained through experiment.Experiment results show that the natural gas instantaneous water heater with condensation has a high practical value.
1998, 20(4):82-85. DOI: 10.11835/j.issn.1674-4764.1998.04.015
Abstract:This paper presents a passive dehumidifying solar houase(PDSH),with combination of the Trombe wall and the dehumidifying air layer.For the envelopment of PDSH a porous slab with salt soluiton is inserted into the air layer of Trombe wall.This slab can absorb moisture at inner side and release moisture at outer side.The PDSH wall can dehumidify the room during the outer air layer open in summer and have heatstoring during the outer air layer shut in winter.It is an important character for the Trombe wall.So,the PDSH wall can be applied to insulation and heatstore,or dehumidifying and cooling.Therefore,the PDSH wall can be adopted everywhere in the world.
1998, 20(4):86-89. DOI: 10.11835/j.issn.1674-4764.1998.04.016
Abstract:ATM technique is a kernel technique in B-ISDN.This paper summarizes the characteristics of ATM technique and its 4 primary ways for realizing switched virtual Network.It is hoped to push the research and application of ATM technique forward.
1998, 20(4):90-94. DOI: 10.11835/j.issn.1674-4764.1998.04.017
Abstract:From the view point of combination of laws with economy, this paper discusses the content,object, nature, investment method and operation style for the urban land operation, the problems in legal operation of urban land were ara lysed.
1998, 20(4):95-98. DOI: 10.11835/j.issn.1674-4764.1998.04.018
Abstract:A storage management approach,based upon multi-base and multi-record is presented in accordance with the current situation and application of the engineering data base.The approach provides a useful model for improving the performance of engineering data base.Through this approach,the intermal storage is fully used,the input/output(I/O)is reduced and the efficiency of the system is enhanced.The user is allowed to define the size and contents of workspace by himself.
1998, 20(4):99-105. DOI: 10.11835/j.issn.1674-4764.1998.04.019
Abstract:紧紧围绕工程项目管理最重要的任务-工程进度展开,探讨如何优化网络进度。
Wang youpin Yu Jianyin Tan Yuhong
1998, 20(4):106-110. DOI: 10.11835/j.issn.1674-4764.1998.04.020
Abstract:通过动态力学分析试验,发现了沥青及改性沥青的低温开裂与其流变参数「E」,E’,E″之间的定量关系以及Tg随温度变化的规律性,推导出改性沥青在动荷载下的流变方程提供了理论依据。
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