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柔性连接半墙填充框架结构有限元分析*
周晓洁1,2,杨承昊1,2
摘 要

(1 天津市土木建筑结构防护与加固重点实验室, 天津 300384; 2 天津城建大学土木工程学院, 天津 300384)

[摘要]半墙填充、墙-框刚性连接易引起框架柱的短柱效应,导致结构破坏模式的改变,不利于结构抗震。在填充墙框架结构低周反复荷载试验的基础上,建立了非线性有限元模型,针对半墙填充框架结构易引起短柱效应的问题,进行了有限元计算以及墙-框连接方式对框架柱破坏形态的影响分析。分析结果表明:墙-框柔性连接不仅改善了结构的抗震性能,减轻了填充墙破损程度,还减小了填充墙对框架柱的侧向约束,有效避免了短柱效应。

[关键词]半墙填充; 框架结构; 刚性连接; 柔性连接; 抗震性能; 短柱效应

中图分类号:TU317+.1, TU375-4文献标识码:A文章编号:1002-848X(2018)06-0035-05

 

Finite element analysis of flexible connection frame structure half-filled with masonry

Zhou Xiaojie1,2, Yang Chenghao1,2

(1 Tianjin Key Laboratory of Civil Buildings Protection and Reinforcement, Tianjin 300384,  China; 2 School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China)

Abstract:Half-filled wall and wall-frame rigid connection could easily cause short column effect on frame columns, which will lead to the changes of structural damage pattern and go against to the structural seismic. Based on the low-cycle loading experiment of the filled wall-frame, nonlinear finite element models were established. To figure out the short column effect caused by the half-filled wall frame structure, finite element analysis and the influence of wall frame connection mode on the failure mode of the frame column were carried out. The tests and analysis results show that: wall-frame flexible connection could not only improve the seismic behavior of structure and reduce the damaged degree of infill wall, but also decrease lateral restraint of the infill wall to the frame and avoid short column effect effectively.

Keywords:half-filled wall; frame structure; rigid connection; flexible connection; seismic behavior; short column effect

 

*国家自然科学基金项目(51678389),天津市科技特派员项目(16JCTPJC54000,17JCTPJC51600)。

 

作者简介:周晓洁,博士,副教授,Email: zhouxj88888@126.com。

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