Improved modal pushover analysis based on two-stage loading pattern

On the basis of the modal pushover analysis (MPA) method, a method of improved modal pushover analysis (IMPA) is proposed. This method overcomes the shortcomings of the fixed loading patterns of the MPA (Modal Pushover Analysis) method, and its loading mechanisms before and after a structure yields are different. Then, by two examples, the IMPA method is compared with the MPA method in terms of roof displacement, inter-story drift angle and elasto-plastic time-history. The results show that the IMPA method is much more accurate than the MPA method when the two methods are used to estimate the structural seismic response. ©, 2015, South China University of Technology. All right reserved.