基于ABAQUS的预制混凝土柱–钢梁节点抗震性能分析

Seismic Performance Analysis of Precast Concrete Column Steel Beam Joints Based on ABAQUS

摘要: 为了更好地利用钢管混凝土柱的优异性能，提出了一种预制混凝土柱–钢梁节点，为研究其抗震性能，通过ABAQUS进行模拟，分析试件的破坏形态、滞回曲线、骨架曲线、耗能能力和节点处应变。模拟结果表明：节点试件的节点域均处于弹性阶段，应力最大部分在钢板和工字梁的连接处，并且工字梁发生局部屈曲，随着轴压比的逐渐增大，节点的极限承载力逐渐减小，节点的抗震性能均满足规范设计要求，试件的破坏形态为梁端塑性铰破坏，发生梁端塑性铰破坏的节点试件具有较好的变形和耗能能力，由于模拟时的边界条件以及钢筋与混凝土之间的粘结滑移与试验时不同，所以所得到的滞回环饱满程度不同，但大体符合规范要求。

Abstract: In order to better utilize the excellent performance of steel-tube concrete columns, a precast concrete column-steel beam node is proposed, and in order to study its seismic performance, simulations are carried out through ABAQUS to analyze the damage morphology, hysteresis curves, skeleton curves, energy dissipation capacity, and strain at the nodes of the specimens. The simulation results show that: the node domains of the node specimens are in the elastic stage, the maximum stress is in the connection between the steel plate and the I-beam, and the I-beam is locally buckled, with the gradual increase of the axial compression ratio, the ultimate capacity of the node decreases, the seismic performance of the node meets the code design requirements, and the damage mode of specimen is the damage of the plastic hinge of the beam end, and the node specimen which occurs the damage of plastic hinge of the beam end has better deformation and energy- consuming capacity. Because the boundary conditions and the bond slip between reinforcement and concrete in the simulation are different from those in the test, the hysteresis loops obtained have different degrees of fullness, but they generally meet the requirements of the code.