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| Complex mode pseudo excitation method for random seismic response analysis of isolated bridge structures |
| JIA Shaomin1, CHEN Huating2, WANG Ziqi2, ZHAO Lei3 |
1.College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China;
2.Earthquake Engineering Research and Test Center, Guangzhou University, Guangzhou 510405, China;
3.School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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Abstract Due to the constitutive relation of isolation bearing having significant non-linearity, nonlinear random seismic response analysis of isolated bridge structures has difficulties of complex theory and large amount of calculation.Here, to simplify analysis process and improve computational efficiency, the equivalent linear model of isolated bridge structures was established and the non-classical damping model was adopted to describe damping characteristics of isolated bridge structures.Based on the complex mode superposition method and the pseudo excitation method, the complex mode pseudo excitation method for random seismic response analysis of isolated bridge structures was established.Numerical examples showed that the established method has high computational efficiency, reliable results and convenient operation.
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Received: 28 April 2019
Published: 28 November 2020
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