超高层建筑空间巨型框架的水平力和重力二阶效应分析新方法  

A new method for second-order effect analysis on spacial mega frame of super tall buildings due to both horizontal and vertical loadings

作　　者：包世华[1] 龚耀清[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]河南理工大学土木工程学院,焦作454000

出　　处：《计算力学学报》2010年第1期40-46,共7页Chinese Journal of Computational Mechanics

基　　金：河南省重点学科资助项目(504906)

摘　　要：对超高层建筑空间巨型框架提出一个考虑水平力与重力相互影响的二阶效应的分析方法。将空间巨型框架简化为三维剪切型弹性地基上的压杆巨型柱和Winkler弹性地基上的巨型梁的组合,分别推导出它们的单元刚度矩阵,按空间刚架进行水平力与重力共同作用的二阶分析。为超高层建筑空间巨型框架提供一个合理、简化的二阶效应分析新方法。A new simplified analytical method is presented for second-order effect analysis on the space mega frame of super tall buildings, which simplifies a spacial mega frame as an assemblage of its mega press-columns with shear-typed elastic subgrade obtained by bending rigidity of the subsidiary frames within the mega frames, and mega girders with Winkler-typed elastic basement provided by the axial stiffness of their accessorial columns. And then the member stiffness matrix of the simplified mega press-column as well as the simplified mega girder was formulated, respectively. Consequently, the see- ond-order effect analysis was performed. It is observed through computing example that the simplified analytical method will supply a reasonable and feasible computing approach for the second-order effect a- nalysis of spacial mega frame of super tall buildings.

关 键 词：超高层空间巨型框架 三维剪切型弹性地基压杆单元 二阶分析 三维Winkler弹性地基梁单元 

分 类 号：TU311.3[建筑科学—结构工程] TU311.4