双腹板顶底角钢半刚性节点的滞回性能研究

运用非线性有限元软件ABAQUS,系统研究钢框架双腹板顶底角钢半刚性节点的滞回性能。在考虑材料非线性、几何非线性和接触非线性的基础上,对该半刚性节点进行位移控制的循环加载。并重点研究连接摩擦系数、角钢长度、角钢厚度、螺栓级别和直径、螺栓排列方式、螺栓预应力及钢材等级对节点承载力和滞回性能的影响。有限元分析结果表明:钢框架双腹板顶底角钢半刚性节点在循环荷载作用下具有良好的延性;角钢厚度、螺栓级别、直径和螺栓排列方式对节点的承载力和耗能性能影响明显,增大螺栓预应力,节点延性下降;钢材等级对节点滞回性能影响不明显。

RESEARCH ON HYSTERETIC BEHAVIOR OF DOUBLE WEB-ANGLE AND TOP-SEAT-ANGLE BEAM-TO-COLUMN CONNECTIONS

In order to study hysteretic behavior of double web-angle and top-seat-angle connections, finite element methods, which included material, geometric and contact non-linearity, were used to the model under cyclic loading. The effects of the friction coefficient, the angle length, the angle thickness, the diameter and grade of the bolt, the bolt prestress, steel grade and the arrangement of the bolt etc on the bearing capcity and hysteretic behavior of connections were studied. Finite element results reveal that the hysteretic behavior, initial stiffness and load bearing capacity are significantly affected by the arrangement of bolt, the angle length, the angle thickness and the bolt diameter and grade.