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基于ABAQUS软件对某超高层结构在长周期地震波作用下的连续倒塌数值模拟方法进行研究。采用纤维梁单元模拟框架梁和框架柱,采用壳单元模拟钢筋混凝土剪力墙和楼板。基于子程序实现梁单元材料积分点材料的失效用于模拟单元生死,基于混凝土弹塑性损伤本构近似模拟钢筋混凝土剪力墙与楼板的刚度削弱及失效,并采用单元接触考虑倒塌过程中单元之间的碰撞和结构碎片堆积情况。以某实际超高层结构为例,分析了结构的动力特性,并对该超高层结构在长周期地震波作用下的破坏模式和倒塌过程进行了模拟,可为超高层结构地震破坏机理和抗震设计研究提供参考。
Based on ABAQUS software, a numerical simulation method of continuous collapse of a super high-rise structure under long-period seismic wave was studied. Fiber beam elements are used to simulate frame beams and frame columns, and shell elements are used to simulate reinforced concrete shear walls and slabs. Based on the subroutine, the material failure of the material of the beam element is used to simulate the life and death of the element. Based on the elasto-plastic damage constitutive model, the stiffness weakening and failure of the RC shear wall and the slab are simulated. Between the collision and the accumulation of structural debris. Taking an actual super high-rise structure as an example, the dynamic characteristics of the structure are analyzed, and the failure mode and collapse process of the super-tall structure under the action of long-period seismic waves are simulated. It can be used to study the earthquake damage mechanism and seismic design of super high-rise structures for reference.