超限高层混凝土大悬挑结构抗震性能数值模拟分析  

Numerical Simulation Analysis of Seismic Behavior of Super High-rise Concrete Large Cantilever Structure

作　　者：吴旭 WU Xu(China Construction Second Engineering Bureau Co.,Ltd,Nanjing Jiangsu210000 China)

机构地区：[1]中国建筑第二工程局有限公司,江苏南京210000

出　　处：《江苏建筑》2022年第S02期1-4,共4页Jiangsu Construction

摘　　要：为提高对大悬挑结构抗震性能分析的精准度,进一步实现对超限高层混凝土大悬挑结构在建筑领域内的推广,引进数值模拟技术,设计一种针对超限高层混凝土大悬挑结构的抗震性能全新分析方法。采用接触法,构建建筑结构有限元模型;引进数值模拟技术,将地震波划分为由竖直方向与水平方向两个方向构成的振动曲线,并将地震波导入von MISES软件中,设置针对地震波的约束条件,模拟在不同波动条件下的建筑振动滞回曲线,实现对地震波的录入;通过对结构位移的计算与不同振动条件下结构位移量的变化趋势,掌握大悬挑建筑在振动条件下的位移变化规律,以此实现对大悬挑结构抗震性能的分析。通过实例检验证明,设计的方法不仅可以实现在地震条件下对建筑位移与偏移角度数据的高精度获取,还可以通过数据的积累,进一步掌握建筑振动规律。In order to improve the accuracy of seismic performance analysis of large cantilevered structures,and to further promote the promotion of over-limited high-rise concrete large cantilever structures in the construction field,numerical simulation technology was introduced to design a large-scale concrete cantilever for over-limited high-rise concrete structures.A new method for analyzing the seismic performance of structures.The contact method is used to build the finite element model of the building structure;the numerical simulation technology is introduced to divide the seismic waves into vibration curves composed of vertical and horizontal directions,and the seismic waves are imported into the von MISES software to set the constraints for the seismic waves,simulate the hysteresis curve of building vibration under different fluctuation conditions,and realize the entry of seismic waves;through the calculation of structural displacement and the change trend of structural displacement under different vibration conditions,the displacement change of large cantilevered buildings under vibration conditions can be grasped.In order to realize the analysis of the seismic performance of large cantilevered structures.The example test proves that the design method can not only achieve high-precision acquisition of building displacement and offset angle data under earthquake conditions,but also further grasp the building vibration law through data accumulation.

关 键 词：数值模拟 大悬挑结构 高层 超限 抗震性能 混凝土 

分 类 号：TU973.31[建筑科学—结构工程]