DOI: 10.11908/j.issn.0253-374x.19138

作者:

作者单位: 1.同济大学 土木工程学院， 上海 200092;2.中建五局土木工程有限公司， 湖南 长沙 410004


作者简介: 黄青隆（1991—)，男，博士生，主要研究方向为大跨空间结构地震反应分析。


通讯作者: 罗永峰（1957—），男，教授，博士生导师，工学博士，主要研究方向为钢结构稳定、抗震理论与施工技术。

中图分类号: TU393.3


基金项目: 国家自然科学基金（51378379）




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

Affiliation: 1.College of Civil Engineering, Tongji University, Shanghai 200092, China;2.Fifth Engineering Division Civil Engineering Co., Ltd., China Construction, Changsha 410004, China


Fund Project:




摘要
| 图/表
| 访问统计
| 参考文献
|相似文献
| 引证文献
| 资源附件

摘要:为提高采用推覆方法计算柱面网壳地震位移需求的效率和精度，提出一种改进的推覆方法。基于能量等效原理，建立不依赖中间参数或增量计算的等效单自由度体系。根据等能量原则，提出确定目标位移的迭代等效方法；采用完全二次项平方根方法(CQC)组合各主振型等效体系目标位移处的振型反应得到结构需求。算例结果表明，相比传统的推覆方法，基于迭代等效的推覆方法得到的柱面网壳最大节点位移、整体位移包络的误差较小。当结构反应由多振型共同主导时，该方法的计算精度稳定。



Abstract: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.





PDF全文下载地址:

点我下载PDF