新型装配式钢管柱轻钢桁架梁节点的滞回性能

The Cyclic Behavior of an Innovative Prefabricated Connection Between Steel Tubular Column and Light-Weight Steel Truss Beam

采用ABAQUS软件对一种新型装配式钢管柱轻钢桁架梁节点进行了数值模拟,重点考察分析了桁架梁连接方式、桁架梁高度、桁架梁弦杆截面、桁架梁弦杆壁厚对其滞回性能、抗弯承载力、节点转动刚度、耗能等的影响。分析结果表明:装配式钢管柱轻钢桁架梁节点的滞回曲线呈现出捏缩特征,但具有较高的抗弯承载力和理想的节点转动能力;塑性铰出现在桁架梁端部空腹节间,实现了理想的延性破坏模式;弦杆采用闭口矩形钢管截面及增加桁架梁高度和弦杆壁厚,均可提高此类节点的抗弯承载力、初始转动刚度和耗能能力。

In this paper,the ABAQUS software is applied to analyze the hysteretic behavior of an innovative prefabricated connection between steel tubular column and light-weight steel truss beam.The influences of connection type,height of truss beam,section of chord member and thickness of chord member are investigated.The hysteretic behavior,flexural bearing capacity,rotational stiffness and energy dissipation capacity of this innovative prefabricated connection are analyzed.The analytical results show that this innovative prefabricated connection has pinching hysteretic loop,high flexural bearing capacity and preferred deformation ability.The plastic hinges occurred at the open web region at the end of truss beam,and the ideal ductile failure mode of this innovative prefabricated connection was obtained.The flexural bearing capacity,initial rotation stiffness,and energy dissipation capacity of this innovative prefabricated connection increase if applied closed chord section,also increase with larger truss beam height and more thickness of chord member.