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15 December 2006, Volume 25 Issue 6 Previous Issue    Next Issue

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Discusses of design method of box girder with corrugated steel webs HU Xu-hui，GU An-bang，XU Jun-lan 2006, 25(6): 1-3.  Abstract ( )   PDF (286KB) ( )   The box girdey,with corrugated steel webs is a new type of composite steel—concrete strueture．It’s introduce the section design、Corrugated mgated steel webs design、shear connecter design and defommtion of the beam calculation，and will provide a method for the later design． References | Related Articles | Metrics

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Overcoming post-downwarping of long span PC continuous rigid frame girder by design measures LIU Shan-hong 2006, 25(6): 4-7.  Abstract ( )   PDF (345KB) ( )   Comparing with the design parameters of several long span prestressed concrete continuous rigid frame girders，which have excessive downwarping caused by girder cracking，the main reasons of causing Order downwarping are presented．In order to improve the permanent shear carrying capacity of box girder，design parameters of improving structural measures are proposed Specific measures．which can overcome the continual post—downwarpings of box girders．are presented．They can also guarantee girders in health states efectively． References | Related Articles | Metrics

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Suspending placement and the methods of wind-resistance of Hulukou Jinshajiang bridge ZHU Liang-qing，XU Yong, ZHOU Zhi-xiang 2006, 25(6): 8-11.  Abstract ( )   PDF (300KB) ( )   In the paper，the construction technology of suspending placement and closure approaching of Itulukou Jiushajimlg Bridge is intm— duced．And also the methods of wind—resistance are introduced Mille constructing the bridge which is located in strong mons00n area．The pa— per earl supply references to construction of long span arch bridges in similar condition． References | Related Articles | Metrics

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The construction control of tensioning of anchor span strand for erecting suspensio bridges SUN Yu-ping，SHEN Rui-li，TANG Mao-lin，WU Tan，LIU Bao-wen 2006, 25(6): 12-16.  Abstract ( )   PDF (370KB) ( )   It is an important part for making sure the harmony ofthe stress state and configuration of structure to that of design．Diferent construction applies diferent method to adjust the eccentricity．As a new method of suspension dge construction，it is diferent from preeccentriciting main saddle，incremental launching main saddle in construction．Through analyzing the construction of lancangjiang bridge，the construction process，the contents and paramctem of costruction control arc introduced，and it is presented that according to the condition of construction control，the circulation condition of tensioning of anchor span strands should be make up so that make sure every component of structure is safe in construction and reach the design location in bridge completion stage．In the end，the tensioning process of anchor span strands divided into two groups will be simulated，and the conclusion will be drew that，with the increasing of the bundle of anchor span strands ，the frequency ofthe tensioning of anchor span strands will be rapidly raised． References | Related Articles | Metrics

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Applica tion of genetic algorithm to the design of bridge strengthen of external prestressing LIU Xiao-yu，XU Huai-lin，ZHANG Tian-yu 2006, 25(6): 17-18.  Abstract ( )   PDF (184KB) ( )   The arrangement of external prestressing steels is influened by various factors in the design ofbfidge strengthen，a kind of genetica1 gofithms based on real number encoding is used and target function is set to the section Rrea ofthe horizontal steels for solving the problem of suitable arrangement of external prestressing steels in this paper． References | Related Articles | Metrics

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Damage evaluate and the method of diagnose study of great highway bridge structure by over loading LI Jian，SUN Jian-yuan 2006, 25(6): 19-21.  Abstract ( )   PDF (312KB) ( )   The dainage of bridge structure is brought by vehicle's overloading，based oil crack theory.Damage evaluate and the method of diagnose of great highway bridge structure by over loading is brought．the feasibility project is brought'about the reinforcement and servicing after bridge structure was damaged. References | Related Articles | Metrics

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Conunent on protection device of bridge piers Wu Zu-lie，XU Dong-feng 2006, 25(6): 22-26.  Abstract ( )   PDF (451KB) ( )   The paper expands the damage of the ship-bridge collision and the necessity of protected piers． Then，it classifies and comments all kinds of protection devices of bridge piers，and summers the merits and shortcomings ofthe current protection devices inthe domestic and inter． nationa1．Finally。two design ways on the protection dcvice are given． References | Related Articles | Metrics

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The destruction analysis of bridge stru ctures due to the mainstream variance of the flood and the corresponding preventive measures CAO Fang，XIAO Sheng-xi 2006, 25(6): 27-30.  Abstract ( )   PDF (302KB) ( )   Aimed at the condition flmt mainstream can not smoothly get through the bridge opening in the engineering，which induced bridge destruction，al1alyze file reason of causing the malmtream variance ofthe flood in front ofthe bridges． Taking bearing and conical slope as examples explains tile destruction mechanism of variant mainstream，propose the corresponding countermeasure of disaster prevention and mitigation． References | Related Articles | Metrics

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Experiment study on local score around a new special bridge pier LIU Bao-jun，CHEN Min-dong，YANG Zhong-chao，YANG Sheng-fa 2006, 25(6): 31-34.  Abstract ( )   PDF (243KB) ( )   The situations of local erosion in riverbed around bridge piers have many project．Due to its complexit，studies on it have been condueted in a semi-empirical and semi—theoretical ways．Though the experimentation．we observe bridge’s local score and the movement of the water．By experimentation，we find that movement of the water is similitude between new type bridge pire and single bridge prie．When the distance of two bridges is closer，the upriver bridge will protect the downriver bridge． References | Related Articles | Metrics

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Numerical simulation research on dynamic excavation process of exit construction of Ranjiaba tunnel JIANG Ming-gui，SUN Liang，XU Lin-sheng 2006, 25(6): 35-37.  Abstract ( )   PDF (204KB) ( )   According to the step excavation method characteristics of left line exit in Ranjiaba tunnel，the dynamic emulation simulataflon of NATM excavation construction process has been conducted successfully with FEM． References | Related Articles | Metrics

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Measurement of anti-slide performance of tunnel road surface and its efect on driving safety YANG Zhen，GUO Zhong-yin 2006, 25(6): 38-42.  Abstract ( )   PDF (335KB) ( )   The anti-slide pefomumce of tunnel road surface is measured at diferent positions of eight tunnels of a montanic expressway by self-developed three-axcs acceleration apparatus．The general alteration regulation of anti-slide performance of tunnel road surface with diferent structure and slope is analyzed，and its effect on driving safety is probed based on the vehicle dynanlic simulation technique． Finally，the rea． sonable suggestion for tunnel road surface structure design are proposed based on the relative research References | Related Articles | Metrics

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Discussion on the three curved square laws using in the alignment’s design of the highway WANG Xiang-feng，SUN Jia-si 2006, 25(6): 43-45.  Abstract ( )   PDF (157KB) ( )   Use three etrrved square laws on one of the basic alignment's cnrvity line to fit a new alignment that is not only succession in curvity，but also even succession in rate changing of curvity，thus make the alignment pleasantly and drive a vekicle orbit in succession．In order to adapt to the high-speed security of driving． References | Related Articles |