...（筒体）；非线性；等效柱模型；纤维模型；大震 [gap=817]Keywords: shear/core wall; nonlinearity; equivalent column model; fiber model; major earthquake ground motion ...
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外部钢框架进一步简化为半刚架和相应的弹性阶梯形等效弯曲杆的串联体系，这种简化模型能考虑柱轴向变形对结构动力反应的影响；
The external steel frames are simplified as a series of half frames and the core tube is modeled as a bending and shearing two spring system.
模型中，桁架柱采用三维梁单元模拟，其等效弯曲刚度利用弯曲试验直接获得。
The Web steel truss beam is simulated with three-dimensional beam element, and the equivalent bending rigidity of the beam could be obtained by bending test.
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