Application of Pushover Method to Seismic Performance Evaluation of Tall Piers for Bridge
LI Zhengying,DANG Pengpeng and LI Jingtao
DOI:10.3969/j.issn.1674-4764.2012.05.007
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2012,Pages 42-49
- Abstract
For bridge with tall piers, the influence of higher modes on structural responses becomes more evident. Modified MPA method(MMPA) which is based on MPA theory and the concept of “equivalent mode height” is presented. To verify the effectiveness and the degree of accuracy of this method, several Pushover methods including MPA and MMPA methods were adopted to analyze tall piers for bridge, and then compares the results with that in dynamic time-history analysis. It is shown that MPA and MMPA methods can improve computational accuracy comparing with other normal Pushover methods when seismic intensity is lower, whereas the computational accuracy for MMPA methods is superior to that in MPA analysis with the seismic intensity becoming larger.