Application of the Pushover method in the seismic analysis of CFST arch bridge
SHEN Xianlong1,CHEN Yongqi2, LIU He2,ZHENG Jiujian1,ZHANG Haijiang1
1. School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, China；
2. Beijing Qitai Vibration Control and Scientific Development Co., Ltd., Beijing 100037, China
Nonlinear static analyses (Pushover) are widely used in the seismic design and performance evaluation of building structures, nevertheless, it is still in the stage of exploration and method verification. Since the seismic responses of bridge structures may be significantly affected by highorder modes, three selected methods, the standard Pushover analysis (SPA), modal Pushover analysis (MPA) and upper boundary Pushover analysis (UBPA), were applied to a bridge structure, namely the Jinghong bridge, with four different patterns of lateral forces, to evaluate its seismic demand. Based on the results from the nonlinear timehistory analysis (NLTHA), the efficiency and error range of the Pushover method in seismic demand estimation of the bridge were evaluated. The results show that when the merits of the MPA and UBPA methods are combined, the longitudinal seismic demand evaluation of ConcreteFilled Steel Tube (CFST) arch bridges are closer to the results from the NLTHA method. This combination can improve the accuracy of the evaluation. It is verified that the Pushover method is suitable for the seismic demand evaluation of CFST arch bridges, which can be used as an example for the seismic demand evaluation of practical engineering projects.
申现龙1，陈永祁2，刘荷2，郑久建1，张海江1. Pushover方法在钢管混凝土拱桥抗震分析中应用[J]. 振动与冲击, 2018, 37(6): 182-187.
SHEN Xianlong1,CHEN Yongqi2, LIU He2,ZHENG Jiujian1,ZHANG Haijiang1. Application of the Pushover method in the seismic analysis of CFST arch bridge. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(6): 182-187.
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