[1]曲扬,罗永峰,黄青隆.单层柱面网壳动力稳定性评估的阶跃推覆分析方法[J].东南大学学报(自然科学版),2020,50(1):81-88.[doi:10.3969/j.issn.1001-0505.2020.01.011]
 Qu Yang,Luo Yongfeng,Huang Qinglong.Step-loading pushover analysis method for dynamic stability assessment of single-layer cylindrical latticed shell[J].Journal of Southeast University (Natural Science Edition),2020,50(1):81-88.[doi:10.3969/j.issn.1001-0505.2020.01.011]
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单层柱面网壳动力稳定性评估的阶跃推覆分析方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第1期
页码:
81-88
栏目:
土木工程
出版日期:
2020-01-13

文章信息/Info

Title:
Step-loading pushover analysis method for dynamic stability assessment of single-layer cylindrical latticed shell
作者:
曲扬罗永峰黄青隆
同济大学土木工程学院, 上海 200092
Author(s):
Qu Yang Luo Yongfeng Huang Qinglong
College of Civil Engineering, Tongji University, Shanghai 200092, China
关键词:
单层柱面网壳 动力稳定 推覆分析 阶跃加载
Keywords:
single-layer cylindrical latticed shell dynamic stability pushover analysis stepped loading
分类号:
TU393.3
DOI:
10.3969/j.issn.1001-0505.2020.01.011
摘要:
为克服传统推覆方法无法考虑结构动力稳定性问题的缺点,提出了一种能够考虑单层柱面网壳结构动力效应的阶跃推覆分析方法.首先,通过推覆分析,构造基于振型刚度的等效单自由度体系,获取网壳结构非线性能力曲线;然后,对网壳结构进行逐级阶跃加载分析,并对等效单自由度体系进行时程分析,转化得到临界失稳伪加速度;最后,结合地震反应谱,求得网壳结构动力失稳临界加速度因子.基于某单层柱面网壳的计算结果表明,所提方法简便有效.相比传统推覆方法,所提方法能够模拟出网壳结构动力失稳破坏现象,计算精度提高58.3%.所提方法给出的失稳模式与时程分析方法基本吻合,平均误差仅为23.6%,分析耗时减少75%.
Abstract:
In order to overcome the drawback that the dynamic stability cannot be considered in the conventional pushover method, a step-loading pushover analysis method taking into account the dynamic effect of single-layer cylindrical latticed shell was proposed. First, by modal pushover analysis, the equivalent single-degree-of-freedom(ESDF)system based on modal stiffness was established and the nonlinear capacity curve of the shell structure was depicted. Then, the shell structure was analyzed by the step-loading pushover method, and the ESDF system under stepped loading was calculated by response history analysis to obtain the critical instability pseudo acceleration. Finally, combining with the seismic response spectrum, the critical instability acceleration factor of the shell structure was figured out. The numerical results based on a single-layer cylindrical latticed shell show that the proposed method is simple and correct. Compared with the conventional pushover analysis, the proposed method can simulate the dynamic instability failure mode with the improvement in precision of 58.3%. The instability mode obtained by the proposed method agrees with that by the response history analysis method with the average satisfying calculating errors of 23.6% and the reduced consumption of 75%.

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备注/Memo

备注/Memo:
收稿日期: 2019-07-26.
作者简介: 曲扬(1991—),男,博士生;罗永峰(联系人),男,博士,教授,博士生导师,yfluo93@tongji.edu.cn.
基金项目: 国家自然科学基金资助项目(51378379).
引用本文: 曲扬,罗永峰,黄青隆.单层柱面网壳动力稳定性评估的阶跃推覆分析方法[J].东南大学学报(自然科学版),2020,50(1):81-88. DOI:10.3969/j.issn.1001-0505.2020.01.011.
更新日期/Last Update: 2020-01-20