Iterative Equivalent Modal Pushover Method for Seismic Displacement Demand Calculation of Cylindrical Latticed Shells

被引：0
|
作者：
Huang Q. [1 ]
Luo Y. [1 ]
Qu Y. [1 ]
Zhu Z. [2 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] Fifth Engineering Division Civil Engineering Co., Ltd., China Construction, Changsha
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2020年 / 48卷 / 04期
关键词：
Cylindrical latticed shells; Iterative equivalence method; Modal pushover; Seismic demand;
D O I：
10.11908/j.issn.0253-374x.19138
中图分类号：
学科分类号：
摘要：
A modified modal pushover method is proposed to improve the efficiency and accuracy of seismic displacement demand calculation of cylindrical latticed shells. First, based on the energy equivalence rule, an equivalent single-degree-of-freedom (ESDF) system for spatial structures is established, in which the equivalent force and displacement of the ESDF system can be directly calculated without using interim parameters or step-by-step calculation. Then, according to the equal-energy rule, an iterative equivalence method is proposed to calculate the target displacement of the ESDF system. Finally, the overall structural seismic demand is obtained by combining the peak responses of dominant modal ESDF systems using the complete quadratic combination (CQC) rule. The numerical results show that compared to the results obtained by using the traditional pushover method, both the maximum and the envelope nodal displacement obtained by using the proposed method yield less error. The accuracy of the proposed method remains stable when structural response is dominated by multiple modes. © 2020, Editorial Department of Journal of Tongji University. All right reserved.
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页码：481 / 489
页数：8
相关论文
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