Archive

15 June 2004, Volume 23 Issue 3 Previous Issue    Next Issue

---

For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Select

Research on reinforcing and repairing of a long-span bi-curved arch bridge ZHOU Zhi-xiang, HE Peng, ZHAO Chan-hui 2004, 23(3): 1-4.  Abstract ( )   PDF (161KB) ( )   A method to strengthen a bi- curved arch bridge is presented according to the damage situation of the bridge. Three measures of enlarging the local sections, strengthning the bracings and changing the form of super-structure are used to avoid the trouble of repairing the whole main-arch. The method has been successfully applied in the rehabilitation of Daning River bridge and presented remarkable social and economic benefits References | Related Articles | Metrics

Select

Mechanism and factor analysis of concrete carbonation and resulted reduction of RC bridge service lives ZHANG Guang-shan, ZHAO Hua, MENG Yun 2004, 23(3): 5-9.  Abstract ( )   PDF (171KB) ( )   More and more scholars and states are paying intensive attention to the study of service lives of reinforced concrete (RC) bridges.The factors affecting the service life are diverse. According to the latest research progress home and aboard, the paper discusses the main factors affecting the service life-concrete carbonation ,and synthetizes the factors affecting carbonation in 3 aspects: material,enviormental actions and construction, at last, gives some effective advices and measures References | Related Articles | Metrics

Select

Evaluation of the effect of collapse in top area of a double-arched tunnel on its the secondary lining WANG Sheng-hui, DU Xiao-ping, YUAN Yong, ZHANG Yong-wu, DU Guo-ping 2004, 23(3): 10-12.  Abstract ( )   PDF (170KB) ( )   Based on the analysis of the reason of the collapse in top area of a double-archde tunnel,FEM means is taken to study the bad effect of collapse loads and some other facotrs on the secondary lining,then some good advices are suggested for tunnel design and construct References | Related Articles | Metrics

Select

The treatments of trickling water after secondary lining of biconnected arch tunnels TANG Liang, PAN Chen-hai 2004, 23(3): 13-17.  Abstract ( )   PDF (177KB) ( )   Trickling water frequently occurs in the outside appearance of biconnected arch tunnels after the secondary lining, influencing their construction quality and operating. In the construction of biconnected arch tunnels in Tongyou Mountain Tunnel, Yinzi Mountain Tunnel No.1, Yinzi Mountain Tunnel No.2 in South Second Ring Road in city of Liouzhou in Guangxi Zhuangzu Autonomous Region, in the light of comprehensive treatments "combining blinding with draining, couple rigidity with flexibility, mult References | Related Articles | Metrics

Select

Analysis of the causes for uneven settlement of intermediate piers of multi-span simple bridges TANG Lin, ZHONG Chuan-jian 2004, 23(3): 18-20.  Abstract ( )   PDF (111KB) ( )   Through the investigation of such factors relating to the settlement of intermediate piers of simple beam bridges as structural self-weight,vehicle loads, pier deformation, foundation settlement and soil compaction,the paper points out, the main causes for the uneven settlement of intermediate piers,providing useful referencd for the intensifying attention to the pier groundwork References | Related Articles | Metrics

Select

A new simplified method of calculating pier′s crack width under eccentric load GAO Yan-mei, LIU Dong, ZHOU Zhi-xiang 2004, 23(3): 21-23.  Abstract ( )   PDF (153KB) ( )   Based on discussing the method of calculating cylinder pier′s crack width under eccentric load in the new Specifications for Design of Reinforced Concrete′s and Prestressed Concrete′s Highway Bridge and Culverts,and the method of using traditional nominal tension stress to calculating it indirectly, we have first brought forth a new simplified method to calculate cylinder pier′s crack width directly by using nominal tension stress, and then verified the data frequently used in engineering. The p References | Related Articles | Metrics

Select

The study on impact performance of flexible fibers concrete YANG Qing-guo 2004, 23(3): 24-26.  Abstract ( )   PDF (125KB) ( )   There is not uniform criterion to study the impact performance of concrete materials nowadays. In order to investigate the performance of flexible fibers concrete, pendulum-hammer impact experiment and fall-weight impact experiment were carried out in laboratory. The experimental results show that flexible fibers concrete has more excellent impact performance than traditional concrete, and the application of flexible fibers concrete in pavement can improve the pavement capacity to resist the imp References | Related Articles | Metrics

Select

The relationship between the construction thickness of surface and the maximum particle-size of asphalt concrete LI Jian, HAO Pen-wen, YIN Jing-ze, LI li 2004, 23(3): 27-31.  Abstract ( )   PDF (1556KB) ( )   The relationship between the construction thickness of structure course and the maximum particle-size of asphalt concrete is one of the factors that affected the compaction capacity of mixture. Based on the compaction capacity and performance, the laboratory tests on the proper ratio were carried on. The results showed that when the proper ratio is 2.5,the asphalt pavement has better performance References | Related Articles | Metrics

Select

Calculation and application of effective temperature of asphalt mixture LI Jing, DAI Jing-liang 2004, 23(3): 32-36.  Abstract ( )   PDF (184KB) ( )   According to the two main defects of fatigue and rutting of asphalt pavement, the paper analyzes the effect of temperature on asphalt mixture and pavement design. Based on the fatigue and rutting tests of asphalt mixture, the principle of equivalent damage and weather data of Shanxi Province, the paper calculates the fatigue and rut effective temperature of asphalt mixture for typical regions in Shanxi, and makes a reference for asphalt pavement design References | Related Articles | Metrics

Select

SASW used in quality assurance for performance of highway subgrade LU Ming-kang, GU Xiao-an, TEN Yu-min, SHI Ming-lei 2004, 23(3): 37-40.  Abstract ( )   PDF (164KB) ( )   The spectral analysis of surface waves system on site testing for performance of highways subgrade is discussed in this paper. On the basis of the modulus of resilience tested on site, the mechanical performance of highways subgrade was investigated in a systematical way by the Rayleigh Wave test, bending test, field CBR and loading plate test. Using statistics, an empirical relation between Rayleigh Wave velocity and modulus of resilience for highways subgrades is established, and the validity References | Related Articles | Metrics

Select

simplified strength criterion for concrete under biaxial stresses XU Yong, ZHOU Zhi-xiang, ZHOU Rui, GAO Yan-mei 2004, 23(3): 41-44.  Abstract ( )   PDF (145KB) ( )   In the analyses of concrete structures, the strength criterion for concrete under biaxial stresses is applied frequently. But in fact, there is some discordance in accuracy among some existing strength criteria and their expressions are relatively fussy. Refering to code for design of concrete structures (GB50010-2002), the paper gains a unilateral Bernoulli’s lemniscate through fitting of a curve on the basis of analysis of document .In comparison with other strength criteria for concrete under References | Related Articles | Metrics

Select

An improved multi-factor equation of concrte carbonation CHEN Wei, ZHOU Zhi-xiang, XIANG Yang-kai 2004, 23(3): 45-47.  Abstract ( )   PDF (136KB) ( )   Some main carbonation models of concrete with multi-factors are analyzed comparatively. Through combination of the recent research and the existent models, an improved model involing the environment factors and the density of CO2 is presented. The results of it match the tested engineering data better. Further more, some conclusions and suggestions are made in the end References | Related Articles | Metrics

Select

Analysis applying 3D damage FEM on the formation mechanism of RC box-culvert cracks(1) WANG Kai, CHEN Hong-kai, LI Li, ZHOU Xiao-liang, WANG Yi-jun 2004, 23(3): 49-52.  Abstract ( )   PDF (141KB) ( )   The paper tried to couple Damage theory with 3D FEM(ie. Damage FEM), and applied to analysis of whole structure’s damage. Define new Degree of Damage with strain as varies of damage. On the basis of this, modify the equation of J.Mazars and build the new damage equation. Ulteriorly form a checkout method. Using the method to analyse mechanism of box-culvert’s cracks formation in Shabin Road in Chongqing. Developing the method is significant for damage theory being applied to engineering practice References | Related Articles | Metrics

Select

Analysis appling 3D damage FEM on the formation mechanism of RC box-culvert cracks(2) WANG Kai, CHEN Hong-kai, LI Li, WANG Yi-jun, ZHOU Xiao-linag 2004, 23(3): 53-56.  Abstract ( )   PDF (198KB) ( )   The paper tries to couple damage theory with 3D FEM (i.e.Damage FEM),and applies it to analysis of holistic structure damage,defines a new degree of damage with strain as the variable of damage. On the basis of that, the paper modifies the equation of J.Mazars and bulids a new damage equqtion,in turn forms a verification method and applies the method to analyse the mechanism of box-culvert cracks formation in Shabin Road in Chongqing.The practice proved the feasibility of the method which is sig References | Related Articles | Metrics

Select

The nonlinear analysis of aggregate subase MEI Ying-jun, LIANG Nai-xing 2004, 23(3): 57-60.  Abstract ( )   PDF (161KB) ( )   The mixture of aggregate has non-linear property, in this paper takes the modulus of elasticity as the function of main and minor stress. Through the finite element model and ordinary tests, get the main and minor stress of each element, and then find the parameters of the model. The result show that the model in this paper suits the mechanics characteristic of the pavement better, and has high theory value in non-linear pavement analysis References | Related Articles | Metrics

Select

Experimental study on characteristics of compaction and wave propagation in the mixture of soil and stone WEI Gang, HUANG Wei-dong, , ZHAO Ming-jie, WU Guo-xiong 2004, 23(3): 61-64.  Abstract ( )   PDF (157KB) ( )   in this paper the properties of compaction and wave propagation for embankment by the mixture of soil and stone are researched through indoor model trials of compaction and wave propagation. Which show that mixture of soil and stone is a good kind of material for pavement. When percent of stone is in the 40～60, and moisture percent is in the best, the mixture of soil and stone has good characteristics of these. Trials results will present reliance for further study of the mixture of soil and sto References | Related Articles | Metrics

Select

Application of anti-slide structures with soil-nailing and pre-stressed anchor cables WU Wen-xue, OUYANG Zhong-chun 2004, 23(3): 65-69.  Abstract ( )   PDF (187KB) ( )   The anti-slide structure with soil-nailing and pre-stressed anchor cables is a new technique dealing with landslides on the foundation of framed anchoring. The paper proposes the function mechanism of the framed anchoring and the design method of the new structure, and presents an application case of landslide control References | Related Articles | Metrics

Select

Appliance of distributing database to cadastral Information system LI Shi-chuan, WANG Ling, SONG Xue-wen 2004, 23(3): 70-72.  Abstract ( )   PDF (104KB) ( )   GIS is a database system based on mass graph and attribute data,which are more compregensive than traditional ones.The traditional database hasa bottleneck of high concentration. With the development ofinternet/intranet technology,distributed databases will be used in GIS widely,the paper puts forward some suggestions References | Related Articles | Metrics

Select

Discussi on about double half-thread reading in measurement of sight lengths by theodolite XIANG Ze-jun, ZHANG Zhi-qing, XIONG Wen-quan, FENG Xiao 2004, 23(3): 73-74.  Abstract ( )   PDF (124KB) ( )   The paper discusses whethter the doubled half-thread reading value read from a theodolite can be taken as a sight-length. After strict derivation in math the mathematic model error value of between the doubled half-thread reading and the full-thread reading is achieved; comparing the drawn error value curve with the accuracy of aurveyed sight-length numbers the paper gives clear conclusions and suggestions References | Related Articles | Metrics

Select

Optimize models of line choice for rebuilding ancient highway with arithmetic WANG Da-cheng, FENG Xiao, WANG Yong 2004, 23(3): 75-79.  Abstract ( )   PDF (1156KB) ( )   In this paper, retrofit of the aligments of worn highways is analyzed. The principles of spline approximation and fitting approximation are applied synthetically, and the objective functions of optimizing models are founded for rebuilding worn highways. To solve the mathematecal programming problems,the numerical means are studied and a Java program is developed to determine the contimuous combined curve parameters meeting the design Specifications References | Related Articles | Metrics

Select

One kinds of matrix describling to integrate progress plan and cost for highway projects HE Shou-kui 2004, 23(3): 80-82.  Abstract ( )   PDF (126KB) ( )   The text research to the integration of progress plan and cost data sets for highway projects, which bases the conflicts between them. Matrices are introduced to describle work breakdown structure and cost breakdown structure,and time-cost related matirix equations are presented to solve the interrelationships between their suface. We introduction the method and example to solve the problem in order to develop a project planning and cost control algorithm,and evaluates the scheduling economy usi.. References | Related Articles | Metrics

Select

Research on methods of managing various factors affecting construction activities and time limit responsibility with factor analysis method WANG Zu-zhi, GAN Yan 2004, 23(3): 83-85.  Abstract ( )   PDF (889KB) ( )   Having analyzed various factors which affect the state of construction activities and corresponding liability management, this article put forward the essential ideas and operational methods on how to use factor analysis method to deal with the crossed responsibilities which affect the management of time limit in different construction activities. These ideas and methods mentioned above simplified the practical management jobs, which can be referred in practical time limit management of contract References | Related Articles | Metrics

Select

Discussion about urban road traffic volume forecasting in terms of the gross control method ZHANG Jian-xu, ZHU Shun-ying, LIU Wei, LIU Jian-feng 2004, 23(3): 86-89.  Abstract ( )   PDF (155KB) ( )   From the systems engineering point of view, the whole related region is regarded as one large system, and the infrastructure esta-blishment for traffic as its subsystem, thus the quantity of passengers and goods as a whole; in turn the total traffic volume is assigned to every traffic zone by many factors, the volume in each district calculated, as a result, the volume distributed to the road networks,then, the required gained quantity References | Related Articles | Metrics

Select

Research on running performance and productivity of loading machines under tableland circumstances YIN Rui, GUO Xiao-hong, LIU Tang-zhi 2004, 23(3): 90-93.  Abstract ( )   PDF (166KB) ( )   The paper investigates not only the influence of tableland circumstances on the matching performance and integrative performance but also the varying laws of power and economy of loading-machines. It also introduces the formula of productivity and the revised coefficient of fuel consuming rate by studying the mechanics and power assignment of engines. References | Related Articles | Metrics

Select

Effects of traveler psychology factors on development of public traffic LI Lin-bo, WU Bing 2004, 23(3): 94-97.  Abstract ( )   PDF (1202KB) ( )   During the decision process of selecting traffic modes to go out, the traveler will sythetically consider such factors as time, fees, conditions and accessible traffic tools. It is farely important to know the traveler psychology posture in the process of selecting the traffic tools when the urban public traffic is advocated. The paper brings up the concept of psychological travel time and makes an analysis of psychological effects on selecting traffic mods by quantifying the process and points References | Related Articles | Metrics

Select

Strategies of customer service railway freight enterprises based on the third party logistics LUO Yan-jiang, LIU Wei-hua 2004, 23(3): 98-103.  Abstract ( )   PDF (201KB) ( )   The current researche of customer service of Chinese railway freight enterprises is discussed in the paper. Meanwhile, the significance of the research is also brought up. The SWOT analysis and its matrix are firstly made in the paper, then, the main strategies of customer service of railway freight enterprises based on the third party logistics are also be proposed. Among those strategies, the customer service-oriemted is the motive, the differential services is the basis, the customer manager References | Related Articles | Metrics

Select

Parking demand farecasting model research based on location analysis and induced traffic WU Jia-you, LIU Shu-hong 2004, 23(3): 104-106.  Abstract ( )   PDF (1119KB) ( )   The static traffic demand and supplies of parking decide the traffic order and jam degree in cities. The prevenient parking forecasting models gained static traffic demandis according to the general building scale. Based on a great number of data this paper finds out that the static traffic demandis interrelated with locaal land using and circumjacent traffic flow nearby. With the summary analysis the paper brings forward the combining parking demand forecasting model based on the land using and... References | Related Articles | Metrics

Select

Problems and solutions in costruction of logistics parks TANG Qiu-sheng, XIE Ru-he 2004, 23(3): 107-110.  Abstract ( )   PDF (742KB) ( )   In view of the current developing situation of domestic logistics parks and according to the intrinsic characteristics (strategies, public welfare, high investment. and long returnperiods) of logistics parks, from the relation of cities and urban logistics, and the role of logistics parks in urban logistics systems, the proposes the terms to be considered in the construction of logisticsparks in cities, and points out the problems of logistics parks in construction, and puts forward the correspo References | Related Articles | Metrics

Select

AHP applied in rational choice of logistics routeways SU Xiao-jun, LUO Xia, CHEN Gao-bo, LI Xue-song 2004, 23(3): 111-114.  Abstract ( )   PDF (1085KB) ( )   The rational choice of logistics routeways is important to reduce the cost of logistics enterprises and raise the benifit of logistics enterprises. This paper establishes a mathematical model of logistics routeways rationalization option using AHP.Some logistics indexs are analysed . Algorithm and statistical test method are applied to find the largest feature root of the feature matrix and to test the uniformity of the judgement matrix. It gives the simple practical algorithm of the rational c... References | Related Articles | Metrics

Select

Design optimization of the control-system algorithm in large-scale hydraulic model experiments LI Xiao-biao, ZHAO Guo-chang, ZHANG Xu-jin, PENG Kai 2004, 23(3): 115-117.  Abstract ( )   PDF (141KB) ( )   Large storage capacity and large lag are the characteristies of large-scale hydraulic models.To improve the static and dynamic indices of the control system largely the dual-loop control of fluxand and water level is applied in the actual design and different optimization algorithms are adopted according to different characterisitics of water level control and flux control,that will insure the quality of the large-scale hydraulic model experiments References | Related Articles | Metrics

Select

Erosion-resisting experiment of regulating structures’toe protection of broad-shallow shifting rivers in Xinjiang HU Jinag, DONG Yu-wen, YANG Sheng-fa 2004, 23(3): 118-122.  Abstract ( )   PDF (176KB) ( )   According to regulating structures existing in Xinjiang, the washout of regulating structures in past years is concretely analyzed and a new structure form, the grid is put forward. Finally by doing a series of experiments in variable slope flume the feasibility of the grid is discussed and its reasonable sizes drawn out References | Related Articles | Metrics

Select

Evaluation of the marine safety based on the fuzzy synthesize judgment LIU Yuan-feng, TANG Xing-li 2004, 23(3): 123-126.  Abstract ( )   PDF (203KB) ( )   There are various of the elements evaluated the marine safety and almost the factors are fuzzy. It is important to evaluate the marine safety in the principle of the fuzzy synthesize judgment according to the security system of the navigation. We need to analyze and discuss the relationship of the elements in their internal and external condition, and determine the main factors. Many of the reliable messages and the detailed data are provided to the shipping companies, marine and channel departm References | Related Articles | Metrics

Select

Syntax-directed definitions implementation based on the bottom-up parsing LI Feng 2004, 23(3): 127-128.  Abstract ( )   PDF (117KB) ( )   Sentence translation goes with parsing,while the computation of in herited attribute values of symools relies on the specific parsing process. The bottom-up parsing is disadvantageous to the inherited attribute compution. The paper discusses how to solve the problem, then gives the methods of implementation, analyzes, compares and evaluates those methods. References | Related Articles | Metrics