桩-土-结构相互作用弹塑性地震反应分析  

Elasto-plastic seismic response analysis of pile-soil-structure interaction

作　　者：刘立平[1] 李英民[1] 韩军[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《世界地震工程》2004年第3期160-165,共6页World Earthquake Engineering

摘　　要：采用动力有限元时程分析方法,以多高层框架结构为对象,研究了水平地震作用下桩-土-结构相互作用时上部结构弹塑性动力特性和规律。结果表明,弹塑性分析和弹性分析引起的结果有较大的差异;考虑弹塑性相互作用后柱的剪力、轴力和弯矩在不同的楼层有放大现象,按折减方法来考虑相互作用并非总是安全的,柱的剪力、轴力、弯矩和等效应力的折减系数沿楼层变化曲线不尽相同,应引起注意。The finite element method is adopted in the study of pile-soil-structure elastio-plastic dynamic interaction. Based on the pile-soil-structure interaction analysis, the main results are as follows: The results calculated in the elastic condition are different from that in the elastio-plastic condition. If the interaction is considered, the peak value of the shear force, axial force and moment of the columns in different story may be greater than those of non-interaction, so the method which considered the interaction by the code of seismic design is not safe at all. And the reduced values of the shear force, axial force, moment and equivalent stress of the columns are different.

关 键 词：结构动力学 桩-土-结构 弹塑性动力有限元 地震反应 有限元法 

分 类 号：TU311.3[建筑科学—结构工程] TU398