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《Journal of Chang'an University(Natural Science Edition)》 2009-05
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Field load testing of inclined tower cable-stayed bridge without back-stays

LIU Yong-jian1,2,YANG Jian1,LIANG Peng1,YAN Dong-huang2,XU Hong-sheng2(1.Key Laboratory for Bridge and Tunnel of Shaanxi Province,Chang'an University,Xi'an 710064,Shaanxi,China;2.School of Civil Engineering and Architecture,Changsha University of Science & Technology,Changsha 410076,Hunan,China)  
This paper presents a field load testing and analytical modeling for the inclined tower cable-stayed bridge without back-stays to evaluate its design theory and structural behavior.The test results are compared with the calculating results of 3D finite element model,including the static behavior,the stress and deformation of the girder and bridge tower,cable forces,and the dynamic behavior,the structural frequency,damping ratio and impact coefficient.The torsional properties of the box girder with 13-meter-long steel-concrete composite cantilevers are analyzed.The results show that the measured values agree well with the calculating ones,while at the twisting working condition the deformation of two sides of the box girder had much difference,which means the relatively lower torsional stiffness.On the other hand,the measured damping ratio of the bridge,whose girder has long steel-concrete composite cantilevers,is larger than others,which means a better anti-vibration performance.The results mentioned above verify the design theory and construction method,and also provide reference for the design of the same type bridge.3 tabs,10 figs,11 refs.
【Fund】: 教育部新世纪优秀人才支持计划资助项目(NCET-06-0855)
【CateGory Index】: U448.27
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