钢管混凝土键连接框架梁和剪力墙的受剪性能
Shear Performance of Frame Beam and Shear Wall Connected by Concrete Filled Steel Tubular Keys
李明 1刘栩邑 1吴潜 1吴欣禹 1吴永新1
作者信息
- 1. 沈阳建筑大学土木工程学院,辽宁沈阳 110168
- 折叠
摘要
目的 研究钢管混凝土键连接框架梁和剪力墙的受剪性能,为工程应用提供设计依据.方法 应用有限元分析软件ABAQUS对比钢管混凝土键连接与现浇连接梁墙的结构受剪性能,分析前者受剪机理及不同因素对受剪性能的影响.结果 钢管混凝土键连接梁墙的结构承载力和延性系数较现浇结构分别提高约10％和34％;钢材强度从Q235到Q390,初始刚度增加8.44％;截面高度从100 mm到120 mm,延性系数提高17.73％;截面厚度每增加2 mm,承载力提高约15％;截面长度和混凝土强度等级对承载力、初始刚度和延性系数的影响均小于15％,纵向距离对其受剪性能几乎无影响.结论 采用钢管混凝土键连接梁墙的结构总体受剪性能优于现浇结构;钢材强度和截面厚度分别是影响初始刚度和承载力的主要因素.
Abstract
This paper was proposed to study the shear performance of frame beam and shear wall connected by concrete filled steel tubular keys(CFSTK)and provide design basis for engineering applications.ABAQUS was applied to compare the shear performance of the beam-wall structure connected by CFSTK and cast-in-site(CS).Former's shear mechanism and performance influencing factors were analyzed.The results show that:the bearing capacity and ductility factor of the beam-wall structure connected by CFSTK increased by about 10％and 34％respectively compared with CS.The initial stiffness is increased by 8.44％from Q235 to Q390.The ductility factor is increased by 17.73％from 100mm to 120mm in section height.The bearing capacity is increased by about 15％for every 2mm increased in section thickness.The influence of section length and concrete strength grade on load capacity,initial stiffness and ductility factor are all less than 15％.The longitudinal distance has almost no effect on its shear performance.It can be concluded:the shear performance of the beam-wall structure connected by CFSTK is better than CS.The steel strength and section thickness are the main factors affecting the initial stiffness and bearing capacity,respectively.
关键词
钢管混凝土键/框架-剪力墙结构/梁墙试件/抗剪性能/有限元分析Key words
concrete filled steel tubular keys(CFSTK)/frame-shear wall structure/beam-wall specimen/shear behavior/FEM引用本文复制引用
基金项目
国家自然科学基金(51978422)
辽宁省教育厅面上项目(LJKZ0561)
出版年
2024
NETL
NSTL
万方数据