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| Traveling Wave Effect Analysis of Cable-stayed Bridge with Support System Based on More Incentives Dynamic Model |
| YU Ming-qiu, ZHU Bing |
| Southwest Jiaotong University, Chengdu, Sichuan 610031，China |
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Abstract Research purposes: Importation of the earthquake incentives is the weakest link for seismic design of large- span bridge structure. As the greater distance between basis of the large-span bridge structure, traveling wave effect should be considered in the progress of earthquake response analysis. At present, the law of the research on traveling wave effect for cable - stayed bridge with support system is rare in domestic. Based on the large-scale finite element analysis software MIDAS/CIVIL computing platforms, a more accurate simulation for the seismic waves on the basis of the cable-stayed bridge spanning railway in center of Zhengzhou differences under the different locations incentive has been performed in this paper, as well as analysis and comparison of the wave traveling wave effect when the bridge be at different velocity of the seismic, a general discussion on traveling wave effect of this bridge-type has been achieved.
Research conclusions: ln a certain phase difference, when considering the one-way trip to the wave effect and three orthogonal traveling wave effect, internal forces and displacement of the structure both change cyclically, with natural cycle the same basically. At the same time, traveling wave effect results a significant impact on the response peak to the earthquake for the cable-stayed bridge with support system.
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Received: 15 August 2008
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2008, Vol. 25 
