An improved modal pushover analysis procedure for estimating seismic demands of structures

被引：43
|
作者：
Mao Jianmeng [1 ]
Zhai Changhai [2 ]
Xie Lili [1 ,2 ]
机构：
[1] China Earthquake Adm, Inst Engn Mech, Harbin 150080, Peoples R China
[2] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
来源：
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION | 2008年 / 7卷 / 01期
基金：
中国国家自然科学基金;
关键词：
seismic demand estimation; pushover analysis; improved modal pushover analysis; two-phase lateral force distribution; capacity curve;
D O I：
10.1007/s11803-008-0786-y
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The pushover analysis (POA) procedure is difficult to apply to high-rise buildings, as it cannot account for the contributions of higher modes. To overcome this limitation, a modal pushover analysis (MPA) procedure was proposed by Chopra et al. (2001). However, invariable lateral force distributions are still adopted in the MPA. In this paper, an improved MPA procedure is presented to estimate the seismic demands of structures, considering the redistribution of inertia forces after the structure yields. This improved procedure is verified with numerical examples of 5-, 9- and 22-story buildings. It is concluded that the improved MPA procedure is more accurate than either the POA procedure or MPA procedure. In addition, the proposed procedure avoids a large computational effort by adopting a two-phase lateral force distribution..
引用
收藏
页码：25 / 31
页数：7
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