摘要
结合两种截面、两种组合方式4个防屈曲支撑试件的低周反复变幅加载静力试验,分析了位移模式下包括荷载-位移滞回曲线、钢芯与外套管相对位移关系、外套管跨中侧向位移及零荷载位移变化规律等在内的力学性能,研究了防屈曲支撑的工作机理及构造要求.研究表明,试件构造合理,滞回曲线稳定、饱满、规律性好;加载过程中,荷载和位移的变化具有不同步性,体现了钢芯的塑性变形;零荷载位移的变化规律是防屈曲支撑力学参数非对称性的表现,体现着支撑内部构造的合理性;间隙大小、限位卡、钢芯与外套管相对刚度是支撑构造设计的关键环节.
Four specimen with two sections and two kinds of cross combinations are designed to study the working mechanism and structural requirements of buckling-restrained brace（BRB）.The force-displacement hysteretic curve,relative displacement of core and tube,zero load-displacement,etc.are researched through the tension-compression cyclic loading hysteretic performance test.Studies show that the load-displacement hysteretic curve is stable,full,and symmetrical.The changes of load and displacement are not synchronized in the loading process,which reflects the plastic deformation of steel core.Zero load-displacement variation reflects the internal structural rationality of the brace.The gap size,relative stiffness of steel core and tube are the key components of brace structural design.
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2013年第5期631-638,共8页
Journal of Henan Polytechnic University（Natural Science）
基金
北京市自然科学基金资助项目(8062009)
国家自然科学基金资助项目(50678013)
关键词
位移
防屈曲支撑
钢芯
构造
抗震性能
displacement
buckling-restrained brace
steel core
structure
seismic performance
