开洞填充墙对混凝土框架柱地震损伤影响分析

发布时间：2018-03-17 11:51

本文选题：底部框架　切入点：填充墙　出处：《振动.测试与诊断》2014年05期 　论文类型：期刊论文

【摘要】：框架结构中的钢筋混凝土柱由于受到填充墙的影响,在地震中会出现短柱效应从而产生严重的破坏。如何较真实地模拟填充墙影响下的框架柱的地震损伤是该类结构抗倒塌研究的重要内容之一。首先,建立了一种考虑填充墙开洞影响的框架柱分段等效非线性弹簧简化模型,并给出了简化模型中弹簧的恢复力取值;其次,基于该模型,以某实际框架结构为工程背景,对底层框架柱进行了地震损伤非线性数值模拟,并将模拟结果与实际震害进行了比较,验证了简化模型的有效性;最后,对底层框架柱的地震破坏演变机理进行了分析,探讨了开洞填充墙对混凝土框架柱地震损伤的影响规律。研究表明,文中的简化模型可以有效地模拟开洞填充墙对混凝土框架柱地震损伤的影响。填充墙开窗后容易造成框架柱的短柱效应,框架柱沿窗高部分在地震中极易发生脆性剪切破坏,其沿窗高区域的抗震设计应该重点考虑。
[Abstract]:Reinforced concrete columns in frame structures are affected by infilled walls. The short column effect will occur in the earthquake, which will cause serious damage. How to simulate the earthquake damage of the frame column under the influence of the infilled wall is one of the important contents of the research on the collapse resistance of this kind of structure. A simplified equivalent nonlinear spring model of frame column segment considering the effect of the hole opening of infilled wall is established, and the value of spring restoring force in the simplified model is given. Secondly, based on the model, a practical frame structure is used as the engineering background. The nonlinear numerical simulation of seismic damage of the bottom frame column is carried out, and the simulation results are compared with the actual earthquake damage to verify the validity of the simplified model. Finally, the mechanism of earthquake damage evolution of the bottom frame column is analyzed. In this paper, the influence of filled walls with holes on seismic damage of concrete frame columns is discussed. The simplified model in this paper can effectively simulate the effect of the filled wall with holes on the seismic damage of the concrete frame column. The short column effect of the frame column is easy to be caused by the window opening of the infilled wall, and the brittle shear failure of the high part of the frame column along the window edge is easy to occur during the earthquake. The seismic design of the high area along the window should be considered.
【作者单位】：南京工业大学土木工程学院;北京工业大学建筑工程学院;
【基金】：江苏省高校自然科学研究重大资助项目(10KJA560012) 江苏省高校自然科学研究面上资助项目(13KJB560003) 中国博士后科学基金资助项目(2012M520133) 江苏省普通高校研究生科研创新计划资助项目(CXZZ13_0441)
【分类号】：TU375.4

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