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.