TANG Guang-wu, GAO Wen-jun, LIU Huai-lin, SONG Gang. Application of the Power Spectrum Method in Seismic Analysis of Seismic Isolation Bridges[J]. Applied Mathematics and Mechanics, 2017, 38(1): 90-98. doi: 10.21656/1000-0887.370551
 Citation: TANG Guang-wu, GAO Wen-jun, LIU Huai-lin, SONG Gang. Application of the Power Spectrum Method in Seismic Analysis of Seismic Isolation Bridges[J]. Applied Mathematics and Mechanics, 2017, 38(1): 90-98.

# Application of the Power Spectrum Method in Seismic Analysis of Seismic Isolation Bridges

##### doi: 10.21656/1000-0887.370551
Funds:  The National Basic Research Program of China (973 Program)(2010CB736103)
• Received Date: 2016-11-21
• Rev Recd Date: 2017-01-01
• Publish Date: 2017-01-15
• The seismic performance of isolated bridges requires that the bridge piers should remain elastic under seismic action. The system mainly dissipates earthquake energy through nonlinear isolation bearings, so presents a typical locally nonlinear problem for seismic analysis. At present, the response spectrum method and the nonlinear timehistory method are normally used for seismic analysis of this kind of structures. In this paper, the application of the power spectrum method in seismic analysis of isolated bridges was studied. According to the design acceleration response spectrum, the compatible design acceleration power spectrum was generated at first, and then the seismic response analysis with the power spectrum method through an iteration process was carried out. The results show that the calculated seismic responses of the structure with the power spectrum method and the response spectrum method are in good agreement with each other.
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