摘要
为更好了解抗震结构填充墙的工作机理,介绍了框架填充墙典型的面内失效模式,并对两层框架填充墙面外倒塌过程进行了模拟再现。研究发现,填充墙主要呈现5种面内失效模式:纯弯曲失效、水平滑移裂缝、对角斜裂缝、多层接缝处滑移失效和平行对角斜撑失效。通过有限元LS-DYNA分析软件对填充墙的面外倒塌过程进行模拟,结果表明,没有任何构造措施的框架填充墙,在罕遇地震作用下容易脱离框架出现倒塌现象,模拟结果和实际震害比较一致。因此,重视填充墙构造措施以防护填充墙的倒塌,对保障人员生命和财产的安全具有重要意义。
In order to investigate the working mechanisms of infilled frame, several typical in-plane failure modes were introduced and out-of-plane collapse process of a two-storey infilled frame was simulated. There were 5 types of in-plane failure modes for infilled frame, i. e. , pure bending moment failure, horizontal slip crack, diagonal crack, multi-layer joints slip failure and parallel diagonal bracing failure. Then, out-of-plane collapse process simulation of this infilled frame was carried out based on the LS-DYNA software. The results show that the infilled walls without any construction measures collapsed easily under rare earthquake. The simulated results were agreed with the actual earthquake damage. So, it is very significant to consider construction measures to prevent the collapse of infilled walls and ensure the safety of life and possession.
出处
《结构工程师》
北大核心
2012年第4期98-101,共4页
Structural Engineers
基金
国家自然科学基金青年基金资助(项目批准号:50908031)
关键词
填充墙
倒塌
模拟
失效机理
infilled wall, collapse, simulation, failure mechanism
