柔性连接开洞填充墙RC框架结构抗震性能数值模拟研究
Study on numerical simulation of seismic performance of masonry-infilled RC frame with opening and flexible connections
张永兵 1李声坤 2吴建新 2刘汇源2
作者信息
- 1. 广西大学土木建筑工程学院,南宁 530004;工程防灾与结构安全教育部重点实验室,南宁 530004;广西防灾减灾与工程安全重点实验室,南宁 530004
- 2. 广西大学土木建筑工程学院,南宁 530004
- 折叠
摘要
为研究橡胶作为新型柔性连接材料对开洞填充墙钢筋混凝土(RC)框架结构抗震性能的影响,对4个缩尺比1/2的开洞填充墙RC框架试件的低周反复加载试验进行数值模拟.采用DIANA非线性有限元软件建立了三维柔性连接开洞填充墙RC框架结构分离式简化微观模型.在柔性连接模型基础上,建立4个相同开洞情况的刚性连接模型进行对比分析.结果表明:分离式简化微观模型能有效实现框架结构破坏规律的模拟;与刚性连接相比,柔性连接开洞填充墙RC框架试件的刚度和强度降低,延性提高.开洞对采用柔性连接与刚性连接的框架结构影响规律相似.在中心开洞形式下建立了 4个不同开洞率的柔性连接填充墙RC框架模型并进行了参数分析,提出了柔性连接开洞填充墙RC框架结构承载力和刚度的折减公式.
Abstract
In order to study the effect of rubber as a new flexible connecting material on the seismic performance of masonry-infilled reinforced concrete(RC)frame with opening and flexible connections,low cyclic loading tests of 4 opening in masonry-infilled RC frame specimens with a scale ratio of 1/2 were numerically simulated.The three-dimensional separated simplified microscopic model of opening in masonry-infilled RC frame with opening and flexible connections was established by using DIANA nonlinear finite element software.Based on the flexible connection model,four rigid connection models with the same opening situation were established for comparative analysis.The results show that the separated simplified microscopic model can effectively simulate the failure law of frame structure.Compared to the rigid connection,the stiffness and strength of masonry-infilled RC frame specimens with opening and flexible connections is reduced,and the ductility is improved.The influence of openings on the frame structure with opening and flexible connection and rigid connection is similar.Four masonry-infilled RC frame with flexible connections of different opening ratios were established and the parameter analysis was carried out under the central opening form.The reduction formula of bearing capacity and stiffness of RC frame structure with masonry-infilled RC frame with opening and flexible connections was proposed.
关键词
柔性连接/开洞填充墙RC框架/抗震性能/DIANA非线性有限元分析Key words
flexible connection/masonry-infilled RC frame with opening/seismic performance/DIANA nonlinear finite element analysis引用本文复制引用
基金项目
广西科技重大专项项目(桂科AA23023034)
国家自然科学基金项目(51868004)
国家自然科学基金项目(51568005)
出版年
2024
NETL
NSTL
万方数据