【摘要】 针对核心筒为八边形、外框架通过局部斜柱形成宝塔状的郑州会展宾馆框架-核心筒超高层混合结构,运用ABAQUS+BEPTA程序,对梁、柱和剪力墙的弹塑性在材料的应力-应变层次上进行精确模拟,采用显式积分的方法,对其进行了罕遇地震作用下的弹塑性时程分析,以检验结构的抗震性能和设计的合理性。结果表明,经过调整后,工程采用的框架-核心筒混合结构形式具有较高的抗震承载力和延性,基于塑性区模型的弹塑性时程分析是保证结构大震不倒的比较有效和可靠的方法。更多还原

【Abstract】 Zhengzhou Exhibition Hotel is a super high-rise frame-tube composite structure,which has an octagonal core tube and a pagoda shaped outer frame formed by inclined columns.Without simplification,nonlinearities of the beam,column and shear wall element were simulated in stress-strain relation level.The explicit method was implemented to integrate the dynamic equations.ABAQUS and BEPTA were used to perform the elastic-plastic time-history analysis under rare earthquake.The validity of the structure design and seismic performance of the structure were studied.The results show that the structure has sufficient seismic capacity and ductility after modification,the goal of collapse prevention under expected rare earthquake is achieved,and the proposed analysis method is reliable.更多还原