弹性地基上空间巨型框架的重力二阶效应分析  

Gravity Second-order Effect Analysis of Space Mega Frame on Elastic Subgrad

作　　者：马伏龙[1] 龚耀清[2] 

机构地区：[1]宁夏大学机械工程学院,宁夏银川750021 [2]河南理工大学土木工程学院,河南焦作454000

出　　处：《河北大学学报（自然科学版）》2011年第6期567-572,共6页Journal of Hebei University(Natural Science Edition)

基　　金：宁夏自然科学基金资助项目(NZ0919)

摘　　要：对软土地基上的超高层建筑空间巨型框架的二阶效应分析建立了一种新的简化分析模型.在空间巨型框架中,仅考虑二级框架柱的轴向刚度,并将其向一级框架梁的轴线方向连续化,使之成为一级框架梁单元的弹性地基,把一级框架梁当作文克弹性地基梁,形成由巨型柱和巨型文克弹性地基梁构成的空间巨型框架,然后考虑了地基(半无限大弹性地基)的弹性变形,按空间刚架进行重力和水平力相互作用下的二阶效应计算.算例计算结果表明,新的简化模型是合理可行的.A new simplified analysis model is developed for second-order analysis of the space mega frame structure of a super tall building built on soft soil.That is,axial rigidities of columns of subsidiary frames within a space mega frame are idealized continuously as Winkler elastic subgrade along the axes of the mega beams.A space mega frame supported on semi-infinite elastic body is then composed by the mega columns and the mega beams with the Winkler elastic subgrade.The stiffness matrix used by the second-order analysis is then obtained by the space mega frame supported on semi-infinite elastic body.It is observed through the computing results that the computing model is rational and feasible.

关 键 词：超高层建筑 空间巨型框架 二阶效应分析 半无限大弹性地基 

分 类 号：TU43[建筑科学—岩土工程] O344[建筑科学—土工工程]