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22 February 1988, Volume 7 Issue 1 Previous Issue    Next Issue

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Fuzzy Comprehensive Synchronitic Evaluation of Bridge Design Parameters with Two Steps Xiao Shengxie, Huang Shouzeng, Zhou Jianli 1988, 7(1): 1-8.  Abstract ( )   PDF (493KB) ( )   Fuzzy comprehensive evaluation of engineesring design parameters with two steps is used ia this article to evaluate various indexes of the design parameters of bridges having been built. According to these indexes, the reasonableness and safety of values taken in design parameters of the original bridges can be identified. The method of evaluation is of practical significance to different bridges in testing and designing. Related Articles | Metrics

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Analysis of Free Vibration of A Pedestrian GRP Bridge with Skew Cable Stays Gong Zhiyu, Feng Guangzhan, Wang Qingyuan 1988, 7(1): 9-17.  Abstract ( )   PDF (503KB) ( )   The main purpose of this paper is to present the work in analyzing free vibration and computing free vibration frequencies of the pedestrian GRP bridge with skew cable stays built in Chongqing Jiaotong Institute with analytical method and energy method. By both methods, the results were in a good approximation and had also been verified by field tests on the GRP bridge.The main frame of the bridge was a box structure made of GRP honeycomb sandwich plates. The local free vibration frequencies of top plates and loagitudenial webs of the box structure had also been calculated and the results were satisfactory. Related Articles | Metrics

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Deformed Shell Model And Level of Single Particles for Nuclear Luo Shiyu, Shao Mingzhu 1988, 7(1): 18-24.  Abstract ( )   PDF (366KB) ( )   The level of single particles of nuclear with ∈4 deform has been calculated, and the stabilities of the super heavy nuclear have also been discussed. Related Articles | Metrics

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Determination of Rationabe Cable Zone in Prestressed Concrete Bending Member Using Improved Correction on Magnel's Diagram Yin Dingan 1988, 7(1): 25-37.  Abstract ( )   PDF (686KB) ( )   The Prestressed concrete bending member must be filfulled in both limit state and normal limit state requirements.This paper briefly describes the cable zone plot with its advantage as well as shortcoming using the usual ideal of working stress theory. The author proposes the improved and revised correction on Magnel's diagram in order to determine the rationable cable zone. Illustrative example is also added in the paper. Related Articles | Metrics

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Five Stage Design of Prestressed Steel Structure Zhang Rucheng 1988, 7(1): 38-47.  Abstract ( )   PDF (700KB) ( )   The conveyer bridge of Dusi washery factory is a steel structure with double spans of 44.8m, wide of 4,74m. Compared with same type of structure it has many advatages eg. light weight, small deflection in vertical and horizontal diretion. The main points are:1. the light covering material is used. 2. five stage design of prestressed steel structure, in which high strenth strend is use to be prestressed tension bar. 3. cross section shape is well choosed.The designed structure using this method not only can save steel about 50%, although can span long distance. Thus this type of structure can wide be adopted in long span structure and can be showed economy.This paper basicaly introduce the five stage design of prestressed steel structure, the construction and the measure. Related Articles | Metrics

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Experimental Study of Influence of Cover on the Cracking Resistance And Development in Reinforced Concrete Members Bai Jiping 1988, 7(1): 48-60.  Abstract ( )   PDF (829KB) ( )   According to the experimental investigation of reinforced concrete members of thicker cover, the model for calculating crack spacing is established. The formulas involving cover C for predicting cracking resistance, crack spacing and crack width are presented.Mechanism, especially caused by cover,are discussed. The Presented formulas can be applied to both thiner and thicker cover and are in good agreement with experimental data. Related Articles | Metrics

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The In-service Behaviour of Soil-cement under Simulated Traffic Loads Ling Tianqing, Liao Zhenhuan 1988, 7(1): 61-69.  Abstract ( )   PDF (663KB) ( )   The paper reviews recent literature concerned with the strength and deformation of the soil-cement under the various simulated traffic loads. From the literature review and test results, the authors analyse the behaviour of the soil-cement for use in base course material, and present a fatigue design method deciding the soil-cement thickness. The method may be used in study or construction. Related Articles | Metrics

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The Relationship Between Dynamic Equation Equivalence And Strict System Equivalence Xu Maozeng 1988, 7(1): 70-76.  Abstract ( )   PDF (367KB) ( )   In this paper a matrix theorm is proved and two corollaries of it was given. On the above basis,a simpler proof of a equivalence theorm concerning dynamic equation equivalence and strict system equivalence is given. What is improtant is not the proof itself but a corollary obtained from the proof, for the corollary uncovers the real connection between the two sorts of equivalence, that is, the two seem not to be entirely equivalent. This allows the equivalence theorm to be stated in an exact form. Related Articles | Metrics

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Analysis of Amplifying Circuits with Negative Feedback Using Node Admittance Matrix Method Du Jiaxin 1988, 7(1): 77-82.  Abstract ( )   PDF (327KB) ( )   This paper gives the discussion on a kind of analysis method, Node Admittance Matrix Method, for negative feedback amplifying circuits. This analysis method has generalised other four methods used in analyzing feedback amplifiers. It is an active network method determined by behaviours of computers, and has advantages of simpler process, more exact result and being more easily adopted to computer-aided analysis (CAA). Related Articles | Metrics

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Highway Bridge Structure Reliability Calculation Using Pocket Computer PC-1500 Xiong Xingyu, Qian Shiming 1988, 7(1): 87-93.  Abstract ( )   PDF (453KB) ( )   In this paper, the principles of structural reliability calculations and calibration of the highway bridge structure desigh standards in force against the method of design checking calculation point are introduced. We can determine the reliability index β of the variant structural components by this method, which is one of the second moment probabilistic engineering design algorithms. This probabilistic design method is closely related to optimization in design. Some examples are given to illustrate the proposed method. A PC-1500 main program of computation of reliability β have been provided in the appendix of the paper. Related Articles | Metrics

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Experiment And Research on Strength of Reinforced Concrete Curved Columns under Eccentrically Loading Cheng Wenshan, Cheng Xiangyun, Yang Wangyun 1988, 7(1): 94-101.  Abstract ( )   PDF (539KB) ( )   In this paper, the additional deflections and ultimate carrying capacity in mid-sections of 16 reinforced concrete parabolic curved columns under load applied with equal eccentricity at each end are obtained from experimental result, and are analyzed according to the current Highway Bridge Code for Design in China,and those of USSR and FRG respectively. The calculations show that the results obtained by our current code closely coincide with those of testing. Related Articles | Metrics

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On Lapping of Bars Yuan Lunyi 1988, 7(1): 102-108.  Abstract ( )   PDF (471KB) ( )   This paper presents mainly the discussion on the lap lenths of bars. With reference to DIN 1045 (1978) "Concrete And Reinforced Concrete Design And Construction" and BS 5400 Part 4 (1983) "Code of Practice for Design of Concrete Bridges", the author explains the basic principles for lapping of bars and puts forward views of modification for relevent provisions stipulated in the "Specification for Designing Highway Reinforced Concrete And prestressed Concrete Bridges And Culverts" (JTJ023-86). Related Articles | Metrics

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Change of Phase of the Light Waves Reflected by Interface of Two Mediums To Youkang 1988, 7(1): 109-112.  Abstract ( )   PDF (214KB) ( )   In this paper, the basic theory of electromagnetics field is used to discuss the change of the phase of the light waves when they are reflected by the interface of two mediums. Related Articles | Metrics

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Methods of Determination of Rubber Content in Rubber-Bituminous Dai Sanyou 1988, 7(1): 113-115.  Abstract ( )   PDF (214KB) ( )   This paper gives two of Britis's methods of determination of rubber content in Rubber-Bituminous. Related Articles | Metrics

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The System of Abstract And Index Journals for S&T Document in China And Its Use Li Baodi 1988, 7(1): 116-121.  Abstract ( )   PDF (473KB) ( )   This paper gives a summarisation of the course of development in China's system of abstract and index journals for S & T document. By taking the form of diagrams, the author presents systematically and comprehensively a variety of means of abstract and index of S&T journals, and provides readers with two usual ways of access. Related Articles | Metrics