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为分析外加强环式方钢管混凝土柱-钢蜂窝梁(ATCFSST-SCB)节点的力学性能,探讨其工程可行性,本文设计并采用有限元软件ABAQUS模拟了此类中柱节点在低周往复荷载作用下的受力过程,模拟前,采用以往的外加强环式方钢管混凝土柱-实腹钢梁(ATCFSST-SB)试验数据对模拟方法进行了验证,分析了其受力过程中及核心混凝土、钢管、钢蜂窝梁和外加强环的应力分布特点,对比了其与同尺寸ATCFSST-SB中柱节点的滞回曲线、骨架曲线、能量耗散系数、等效粘滞阻尼系数及延性系数。结果表明:ATCFSST-SCB中柱节点的最大应力主要出现于上下外加强环对应的混凝土部分、与钢梁平行方向的外加强环、钢蜂窝梁的梁端翼缘和上下环板间的钢管区域;与ATCFSST-SB中柱节点相比,ATCFSST-SCB中柱节点的承载力略低,但仍然较高,而其延性和耗能能力较好,满足工程需要,具有工程可行性。
In order to analyze the mechanical properties of CFST-steel honey-comb girder (ATCFSST-SCB) and investigate its feasibility, a finite element software ABAQUS was designed and simulated in this paper. Before the simulation, the simulation method was verified by using the experimental data of the conventional reinforced concrete-filled square steel tube column (ATCFSST-SB) before the simulation. The influence of the stress on the core concrete , Steel pipe, steel honeycomb girder and external reinforcing ring, the hysteresis curve, the skeleton curve, the energy dissipation coefficient, the equivalent viscous damping coefficient and the ductility coefficient of the center-column joint of ATCFSST-SB were compared. The results show that the maximum stress of the column node in ATCFSST-SCB mainly appears in the concrete part of the upper and lower reinforcement rings, the outer reinforcement ring in the direction parallel to the steel girder, the beam end flange of the steel honeycomb beam and the steel pipe region between the upper and lower ring plates; Compared with the center node of ATCFSST-SB, the bearing capacity of the column node in ATCFSST-SCB is slightly lower, but still higher, and its ductility and energy dissipation capacity is better, which meets the engineering needs and is feasible in engineering.