无筋砌体墙的平面外横向承载力

IF 3 Q2 ENGINEERING, CIVIL
S. Hwang, S. Kim, Y. S. Choi, K. Yang
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引用次数: 2

摘要

摘要本研究测试了两个全尺寸无筋砌体(URM)墙在恒定轴向应力和循环平面外横向载荷下的受力情况,并基于混凝土的弹性和塑性定理,提出了预测其摇摆和足趾抗压强度的数学模型。这两个样本被设计成模拟一个没有开口的无孔URM墙和一个有门的URM墙。长度590的平行墙 mm,厚度190 mm在平面外方向上的壁的两端构造,产生杠铃形截面。试验结果表明,URM墙试件最初受摇摆旋转的控制,最终因压趾挤压而失效。等效阻尼系数的值在摇摆旋转发生之前大多保持不变,超过摇摆旋转后逐渐增加。开门对URM墙平面外地震响应的影响是微不足道的,因为施加的横向荷载主要由辅助平行墙的平面内作用来抵抗。所提出的模型准确地估计了URM墙在平面外横向载荷下的摇摆和足趾抗压强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Out-of-Plane lateral load capacity of unreinforced masonry walls
ABSTRACT This study tests two full-scale unreinforced masonry (URM) walls under constant axial stress and cyclic out-of-plane lateral loads and proposes mathematical models to predict their rocking and toe crushingstrengths based on the elasticity and plasticity theorems of concrete. The two specimens were designed to simulate a non-perforated URM wall without opening and a URM wall with a door opening. Parallel walls with a length of 590 mm and thickness of 190 mm were constructed at the both ends of the walls in the out-of-plane direction, producing a barbell-shaped section. Test results showed that the URM wall specimens were initially governed by the rocking rotation and then ultimately failed with compressive toe crushing. The value of the equivalent damping coefficient mostly remained constant up to the occurrence of rocking rotation, beyond which it gradually increased. The effect of a door opening on the out-of-plane seismic response of the URM wall was insignificant because the applied lateral loads were resisted mainly by the in-plane action of the auxiliary parallel walls. The proposed models accurately estimated the rocking and toe crushing strengths of URM walls under out-of-plane lateral loads.
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来源期刊
CiteScore
3.90
自引率
9.50%
发文量
24
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