利用有限元软件ABAQUS建立了L型截面钢管混凝土异形柱节点的数值模型,对节点模型分别进行不同轴压比下的单调加载和往复加载的有限元分析.根据计算结果评价节点的抗震性能.钢管混凝土组合异形柱有较好的抗震性能,L型柱的屈服点提高,结构变形能力增强,结构耗能能力有所提高.在极限破坏状态时,柱外围混凝土会发生较大范围的开裂与破碎.L型钢管混凝土柱有可能承受更高的轴压比,其中的钢管存在进一步变形耗能的能力.%With finite element software ABAQUS,a numerical model for L-shaped column joint embedded with concrete filled steel pipe is established,in order to analysis its seismic performance for different axial compression ratios and two different types of loading processes.The results show that T-shaped column joint could exhibit good seismic performance.The high yielding point means the enhanced load bearing capacity,and the notable deflection following appearance of plastic pivot,means the necessitate ductility.The plump hysteresis loop means the desired energy dissipation capacity.It is also shown that concrete around steel pipe will exhibit worsen crushing at ultimate state for load bearing capacity.L-shaped column might have capacity to bear larger axial compression and it is predicted that steel pipes could have potential capacity of dissipating much more energy.
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