弹性地基上空间巨型框架结构的自由振动分析  

Analysis of free vibration for space mega frame structure with elastic subgrade

作　　者：白俊英[1] 龚耀清[2] 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]河南理工大学土木建筑工程系,河南焦作454000

出　　处：《宁夏工程技术》2006年第4期346-349,共4页Ningxia Engineering Technology

摘　　要：针对弹性地基上的空间巨型框架结构的动力分析,提出了一种简化的算法,即将空间巨型框架结构中的辅助框架柱只考虑其轴向变形,沿巨型框架梁的轴线方向连续化后,作为巨型梁单元的弹性地基,把巨型梁按照巨型弹性地基梁处理,然后将巨型柱和巨型弹性地基梁组成空间巨型框架;在考虑了地基的弹性变形后,用一种简化的空间杆系——层模型对其进行动力分析.算例计算结果表明:新的简化方法是合理的、可行的.Based on dynamic analysis of space mega frame with the elastic subgrade, a simplified calculation was presented, i.e. only the axial rigidities of columns of subsidiary frames of a space mega frame structures were considered to distribute continuously along the axes of the mega frame beam, and as the elastic subgrade of huge beams elements, the huge beams were treated as the beams on elastic subgrade. Space mega frame was then composed by the huge columns and the huge beams with elastic foundation. The mass of building were concentrated on the storey of huge beams after considering deformation of the subgrade, and structure＇ s dynamic analysis was performed with a simple model named space frame with storey. Through results of calculation a conclusion can be obtained that this new simplified method is rational and feasible.

关 键 词：空间巨型框架 弹性地基 等效刚度 空间杆系——层模型 自由振动 简化分析 

分 类 号：TU973[建筑科学—结构工程]