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24 February 1997, Volume 16 Issue 1 Previous Issue    Next Issue

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Floodwater Pressure Testing and Safety Analysis of the Bridge Constructure Yang Bin, Zheng Yingong, Tuo Yao, Xiao Shengxie 1997, 16(1): 1-7,20.  Abstract ( )   PDF (245KB) ( )   In the paper,probality distribution,time main value and fluctuant intensity pressure of surface testing points on the bridge constructure (mainly concentrating on the upper part) are tested by dynamic pressure testing system.Vertical applied force of the bridge constructure is analyzed,and the proposal is put forward for the safety of the bridge constructure. Related Articles | Metrics

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Comprehensive Evaluation of Bridge Resistant Force against Mountain Torrent Hu Wenxue, Xiao Shengxie 1997, 16(1): 8-14.  Abstract ( )   PDF (200KB) ( )   In this paper,we provide that bridge resistant force against mountain torrent is affected by random and fully factors.Using ultimate design theory and fully comprehensive judgement to evaluate bridge resistant force,and deciding current bridge resistant force and safety margin against mountain torrent,it prevents destorying briges against mountain torrent preventing decision accordance. Related Articles | Metrics

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General Approach on Geomorphologic Evolution in Bailongjiang Basin since Quaternary Chen Hongkai, Li Jijun 1997, 16(1): 15-20.  Abstract ( )   PDF (188KB) ( )   On the basis of investigations in field and testings in laboratory,we have concluded the basic geomorphologic evolution in Bailongjiang basin.The results have identified that 2、4 and 6 terraces are exsisted respectively in upstream zone,medstream zone and trasient zone between upstream and medstream of the basin. T4-T6 and T3 were formed in earlier Quaternary and 600 Ka·B·P· respectively.The tectonic upheavl mode in the basin is consistent with that in Qinghai Xizang plateau,but it used to be weaker.Catastrophic geomorphologic processes such as debris flow and landslide are quite obvious in the course of the geomorphologic evolution in the basin.There are at least two old typical debris flow sediments in T3 profile,occuring in earlier and latter times of kabula interglaciation. Related Articles | Metrics

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Group Decision Making Models on Allocation of Resources Yang Lei, Zhou Lingling 1997, 16(1): 21-25,37.  Abstract ( )   PDF (181KB) ( )   This paper focuses attention on the group decision making of resource allocation.We discuss the Pareto model and core model and point out some defects of them when they are used in the allocation of resources.A barycenter model of group decision making on resource allocation is constructed in this paper using group's loss function based on the additive kind of group cardinal utility function.Main results in this paper are that the barycenter model selects barycenter of ideal allocation set as the outcome of group decision making.and that the barycenter of ideal allocation set is pareto optimal. Related Articles | Metrics

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Research on the Reasonable Development Scale of the Rural Road in Shanxi Province Zhou Wei, Bai Zongxiao, Yang Yunfeng, Wu Xiaojian, Feng Minghuai 1997, 16(1): 26-31.  Abstract ( )   PDF (172KB) ( )   By means of the qualitative analysis combining with quantitative one,this paper investigates the reasonable scale of shanxi provincial rural road development with several mathematics models,and proposes a relevant strategy target. Related Articles | Metrics

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Flexural Rigidity and Equivaleut Span of Curve Box Girder Cheng Xiangyun, Zhang Weiping 1997, 16(1): 32-37.  Abstract ( )   PDF (191KB) ( )   Based on the flexural rigidity of curve box girder,This paper proposes the concept of equivalent span,and transforms the space analysis of continuous curve box girder into the foree analysis of plaae structure.This method is clear-cut and simple with high precision,therefore,it can be applied to practice. Related Articles | Metrics

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Reliablity Analysis of Calculation and Restriction Pattern Given by 《Standard of Highway and Bridge》 for Crevices Width of a Bridge Zhou Jianting, Wang Shihuai 1997, 16(1): 38-43,67.  Abstract ( )   PDF (204KB) ( )   In this article we calculate the reliablity target of calculation and restriction pattern given by 《Standard of Highway and Bridge》 for crevices' width of bridge by analysing relevant factors.Further more,from the result of calculation and analysis,we point out the pattern's reliablity and inadequacy which will be useful in practice. Related Articles | Metrics

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Numerical Analysis for Stresses and Deformations of solidified shell in ISP Type Mould for Continuous Casting of Thin Slabs Yan Bo, Wen Guanghua, Zhang Peiyuan, He Junfan 1997, 16(1): 44-49.  Abstract ( )   PDF (210KB) ( )   The temperatures and thichnesses of solidified shells in ISP type mould for continuous casting of thin slabs are analysed,and based on which three dimensional thermal palsto-elastic EFM analyses on the shells are carried out,and,in turn,the distributions of temperatures,stresses and displacements,as well as the longitudinal cracking index (L.C.I),transversal cracking index (T.C.I) and the index defined with effective stresses of the solidified shells in the different drawing speeds are given. Related Articles | Metrics

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Non-Linear Rheological Model of Asphalt Concrete and Pavement Cracking Temperature Prediction Li Guoqiang, Huang Wei, Deng Xuejun, Yang Guangjia 1997, 16(1): 50-59.  Abstract ( )   PDF (282KB) ( )   Based on Burgers model,a four elements non linear rheological model (FENR) is developed.Its creep analytic solution shows that it can express the whole process of creep and creep rupture of asphalt concrete.In addition,the creep coincides with test results.Especially,FENR model supplies asphalt concrete with a creep rupture criterion σmax.Taken Hills and Brien's assumption of pavement,the prediction equation for pavement cracking temperature is developed by using FENR model and discretization of temperature induced stresses.The computer program has been compiled,which can predict pavement cracking temperature under arbitrary monotonic cooling function.Thus,the problem existed in Hills and Brien's method is initially solved.The method and computer program are of practical value. Related Articles | Metrics

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Study on a Kind of Control Method of Road Vehicle Active Suspension Li Wei, He Yusheng 1997, 16(1): 60-67.  Abstract ( )   PDF (232KB) ( )   The problem of part state feedback control of road vehicle active suspension is studied in this paper.The basic theory and the numerical method of the optimization of part state feedback control law are described,and the computer programmes are also built.According to the paraments of ‘JH631K’,the optimal control laws are calculated.The application of modern linear stochastic optimal control theory in road vehicle active suspension design are perfected. The results of the numerical simulation and the model test of the suspension charactistics show that the effects of vibration absorption of part state feedback optimal control and of full state feedback optimal control are similar in active suspension;but the realization of part state feedback optimal control is simple.So it has great value in application,and all theory and method in this article are practicable. Related Articles | Metrics

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Static Calculation of Buoy Mooring Fast Pan Bin, Gao Jie, Chen Xiaohong, Chen Jiading 1997, 16(1): 68-73.  Abstract ( )   PDF (184KB) ( )   The static calculating method of a buoy mooring fast is discussed in this paper.The method can be used to two fasting state:loose and tense.The computer algorithm and a caluctation example are given. Related Articles | Metrics

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The Technical Test Research of HC Anchorage on Main Cable of the Humen Suspension Bridge Wang Fuming, Deng Zhigang 1997, 16(1): 74-79.  Abstract ( )   PDF (178KB) ( )   The achivements of the HC anchorage technical test research of the parallel wire strand (127 wires) on main cable of human bridge are introduced in this paper.It includes the following questions:1. The test method;2. The zinc coper alloy pouring、the alloy constriction and supplement pouring;3. The optimum thickness choice of the slab which distributes the wire;4. The synthetical effect discussion of the anchorage technique.Some conclusions are obtained finally. Related Articles | Metrics

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The Effect of Aggregate Alkali Number on Water Stability of Asphalt Mixtures Hao Peiwen, Zhang Dengliang 1997, 16(1): 80-85.  Abstract ( )   PDF (176KB) ( )   The adhesion of asphalt with aggregates affect the duration property of asphalt mixtures,if aggregates are very poor and not modified,it can't gain stabilited mixtures.So the paper researches on the effect of aggregate alkali number on water stability,at last,the aggregate alkali number with water stability standard of asphalt mixtures is put forward. Related Articles | Metrics

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The Applications of the Foamed Composite in Foundation Works Zhang Xixiang, Liu Jun 1997, 16(1): 86-92,106.  Abstract ( )   PDF (246KB) ( )   This paper introduces the technigue and economic property,fundamental applying method,effects and examples of engineering and the applying technigue ideas of the foamed composite. Related Articles | Metrics

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Discussion on Some Problems in Design of the Base and Pavement for High-Type Mountain Highway and Proposals Concerning Highway Base and Pavement Codes of the Design Wei Lingde 1997, 16(1): 93-99.  Abstract ( )   PDF (220KB) ( )   In high-type mountain highway,sinking,piping failures,landsliding,waste-watering often may occur.Based on investigation of the problems,some technology of slope stability for high-type mountain highway are presented.Furthermore,some modifications for the design codes of highw ay base and pavement are proposed.These modifications may be used as a reference for the design and construction for high-type mountain highway. Related Articles | Metrics

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An Approximation Method of Calculating Alignments' Intersections in Interchange's Horizontal Alingment Design He Guohong 1997, 16(1): 100-106.  Abstract ( )   PDF (217KB) ( )   This paper uses successive approximation methods for calculating alignments' intersections horizontal alig nment design.This method is simple to calculate and definite.It has fast convergence speed,Any alignment uchich has calculating program of coordinate of middle pegged-point this calculating method is easy to perform in computer. Related Articles | Metrics

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Research on Urban Travel Demand Management Theory Zhu Shunying, Yang Tao 1997, 16(1): 107-113,117.  Abstract ( )   PDF (240KB) ( )   This paper presents the significance and emergence of travel demand management (TDM)research in China,and summarizes the situations of the research in the world.We discuss the implication,objective,the eight basic theories and the tactics on TDM. Related Articles | Metrics

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Obtaining the Intensity Factors for Mode Ⅲ Cracked Strips by Using the Near Crack Line Analysis Method Wang Bin 1997, 16(1): 114-117.  Abstract ( )   PDF (134KB) ( )   By using the near crack line analy sis method,the stress intensity factors of a centrally-cracked strip,as well as sn an edge-cracked strip by classicalloading,and an eccentrically-cracked strip loaded by uniform antiplane shearing and a centrally-cracked strip loaded by point forces have been obtained. Related Articles | Metrics

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Existence of Periodic Solution for a Class of Planar Nonautonomous System Yang Qigui, Yang Fangmin 1997, 16(1): 118-121.  Abstract ( )   PDF (125KB) ( )   In this paper,we have studied the ex istence of periodic solution for a class of nonautonomous system x=φ(y)-F(x)+P(t),y=-g(x) Sufficient condition to exist periodic solution for the system is obtained,and the results in [4-5] are extended. Related Articles | Metrics

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The Revision of Flow Velocity Distribution About River Mathematical Model Yang Weijun, Deng Boqiang 1997, 16(1): 122-126.  Abstract ( )   PDF (155KB) ( )   This paper presents a kind of way to revise flow velocity distribution acco rdding to plane twodimension river mathematical model,by which we can find a linear correlation equation about U"m/Um and hi/h from the regulation engineering of Guang Yin Sands in Chang Jiang River. The revision value can be better identical with the model measured value than the model calculated value can. Related Articles | Metrics