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弹性地基上空间巨型框架结构的自由振动分析
引用本文:白俊英,龚耀清.弹性地基上空间巨型框架结构的自由振动分析[J].宁夏工程技术,2006,5(4):346-349.
作者姓名:白俊英  龚耀清
作者单位: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
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.

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
文章编号:1671-7244(2006)04-0346-04
收稿时间:07 7 2006 12:00AM
修稿时间:2006年7月7日

Analysis of free vibration for space mega frame structure with elastic subgrade
BAI Jun-ying,GONG Yao-qing.Analysis of free vibration for space mega frame structure with elastic subgrade[J].Ningxia Engineering Technology,2006,5(4):346-349.
Authors:BAI Jun-ying  GONG Yao-qing
Affiliation:1. School of Civil and Water Conservancy Engineering,Ningxia University, Yinchuan 750021, China ; 2. Civil Engineering Department , Henan Polytechnic University, Jiaozuo 454000,China
Abstract:Based on dynamic analysis of space mega frame with the elastic subgr ade,a simplified calculation was presented,i.e.only the axial rigidities of c olumns 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 elasti c subgrade of huge beams elements,the huge beams were treated as the beams on e lastic 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 th e storey of huge beams after considering deformation of the subgrade,and struct ure'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 ne w simplified method is rational and feasible.
Keywords:space mega frame  elastic subgrade  equivalent stiffness  model of s pace frame with storey  free vibration  simplified analysis
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