Non-Stationary Random Seismic Analysis of Large-Span Composite Beam Cable-Stayed Bridges Under Multi-Support and Multi-Dimentional Earthquake Excitations

ZHAO Lei; LIU Ning-guo

doi:10.21656/1000-0887.370528

Volume 38 Issue 1

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Article Navigation > Applied Mathematics and Mechanics > 2017 > 38(1): 118-125

ZHAO Lei, LIU Ning-guo. Non-Stationary Random Seismic Analysis of Large-Span Composite Beam Cable-Stayed Bridges Under Multi-Support and Multi-Dimentional Earthquake Excitations[J]. Applied Mathematics and Mechanics, 2017, 38(1): 118-125. doi: 10.21656/1000-0887.370528

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Non-Stationary Random Seismic Analysis of Large-Span Composite Beam Cable-Stayed Bridges Under Multi-Support and Multi-Dimentional Earthquake Excitations

doi: 10.21656/1000-0887.370528

ZHAO Lei¹,
LIU Ning-guo²

¹School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P.R.China;²China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd., Chongqing 400067, P.R.China

Funds: The National Natural Science Foundation of China(51178394)

Received Date: 2016-11-07
Rev Recd Date: 2016-12-21
Publish Date: 2017-01-15

Abstract

Abstract

To investigate the influences of non-stationary earthquake excitations on the random seismic responses of composite beam cable-stayed bridges, the non-stationary random seismic responses of a composite beam cable-stayed bridge were analyzed with the multi-dimensional and multi-support pseudo excitation method to directly solve the absolute displacements by means of general FEM software. The results demonstrate that the non-stationary random seismic responses of the composite beam cable-stayed bridge under multi-support and multi-dimentional earthquake excitations can be calculated efficiently with the pseudo-excitation method based on the absolute displacement solution. The stationary assumption for the structural design will usually lead to conservative results. The traveling wave effects are significant for the responses of the large-span composite beam cable-stayed bridge and will be favorable to the displacement at the tower top and the internal force at the tower bottom, instead will be adverse to the displacement and the internal force at the main beam centre.
- composite beam cable-stayed bridge,
- pseudo-excitation method,
- non-stationary earthquake motion,
- traveling wave effect

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References(13)

References

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