摘要
为研究网格间距对网格剪力墙抗震性能的影响,对两个竖肢中心距不同的小剪跨比网格剪力墙进行了拟静力试验及有限元分析。结果表明:横肢中心距相同、竖肢中心距分别为200 mm及300 mm的网格剪力墙破坏模式不同,竖肢中心距为200 mm的网格剪力墙下部和墙底角部混凝土破坏,破坏模式为剪压破坏;竖肢中心距为300 mm的网格剪力墙沿对角线主斜裂缝错动并产生滑移,破坏模式为剪拉破坏。两个试件的极限位移角均在1/100左右,竖肢中心距为300 mm的网格剪力墙刚度和承载力略大。有限元模拟结果与试验吻合良好,验证了模拟方法的有效性。提出了适用于不同间距网格墙的等效厚度计算方法,网格剪力墙可等效为实体剪力墙计算刚度和承载力。
In order to study the effect of grid spacing on seismic performance of grid shear wall,the quasi-static test and finite element analysis were carried out on the grid shear wall with small shear span ratio with different center spacing of two vertical elements.The results show that the failure modes of grid shear walls with the same center distance of horizontal elements and 200 mm and 300 mm center distance of vertical elements are different.The concrete at the bottom and corner of the grid shear wall with the center distance of vertical element 200 mm is damaged,and the failure mode is shear compression failure.The grid shear wall with 300 mm center distance of vertical element moves and slips along the diagonal main diagonal crack,and the failure mode is shear tension failure.The ultimate drift ratio of the two specimens is about 1/100,and the stiffness and strength capacity of the grid shear wall with the center distance of vertical element of 300 mm are slightly larger.The finite element simulation results are in good agreement with the experiment,which verifies the effectiveness of the simulation method.A method for calculating the reduction thickness of grid wall with different spacing is proposed.The grid shear wall can be equivalent to solid shear wall to calculate the stiffness and strengh capacity.
作者
张微敬
初晓
ZHANG Weijing;CHU Xiao(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《世界地震工程》
北大核心
2023年第1期89-99,共11页
World Earthquake Engineering
基金
国家自然科学基金项目(52078012)。
关键词
网格剪力墙
网格间距
拟静力试验
有限元分析
等效厚度
grid shear wall
grid spacing
quasi-static test
finite element analysis
equivalent thickness
作者简介
张微敬(1969-),女,教授,博士,主要从事工程结构抗震等方面的研究.E-mail:zhangweijing@bjut.edu.cn。
