摘要
研究了(CFST)t形钢管混凝土柱-钢梁节点的抗震性能，旨在扩大其在高抗震设防烈度地区的适用性。介绍了一种t形钢管混凝土柱-钢梁边板节点的施工形式。在这些实验中研究的变量包括侧板长度、轴压比、侧板的存在和约束棒的存在。研究了7个试件在低周往复荷载作用下的受力机理、破坏模式、荷载-位移曲线、强度、刚度、延性和耗能能力。试验结果表明:边板节点呈现全滞回曲线,延性系数在1.67~2.49之间,等效粘滞阻尼系数在0.147~0.234.之间节点板区具有较强的变形和耗能能力。侧板和约束筋的加入改善了节点的抗震性能。侧板的设置使钢梁形成塑性铰，形成梁铰破坏机制，满足建筑结构要求的“强柱弱梁、强节点弱构件”抗震设计原则。
Abstract
This study investigates the seismic behavior of the T-shaped concrete-filled steel tubular (CFST) column to steel beam joints, aimed at expanding their applicability in areas with high-seismic fortification intensity. A construction form of T-shaped CFST column to steel beam joint with side plates is presented. The variables studied in these experiments include the side plate length, the axial compression ratio, the presence of side plates, and the presence of binding bars. The force mechanism, failure modes, load–displacement curves, strength, stiffness, ductility, and energy dissipation capacity of seven specimens were evaluated under low-cycle reciprocating load. The experimental results demonstrate that the joints of side plates show a full hysteresis curve, with the ductility coefficient ranging from 1.67 to 2.49, and the equivalent viscous damping coefficient between 0.147 and 0.234. The joint panel zone displays strong deformation and energy dissipation capacity. The inclusion of side plates and binding bars improves the seismic behavior of the joint. The setting of side plates enables the formation of a plastic hinge on the steel beam, creating a beam hinge failure mechanism and satisfying the seismic design principle of “strong column and weak beam, strong joint and weak member” as required by the building structures.
NETL
NSTL
Wiley