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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:

第30卷

期数:

2009年第4期

页码:

458-463

栏目:

出版日期:

2009-07-20

文章信息/Info

Title:

Influence of Support Restraint on the Fire-Resistant Performance of Grid Structure

文章编号:

1000-5013(2009)04-0458-06

作者:

杜咏; 李国强

南京工业大学建筑与城市规划学院江苏南京; 同济大学土木工程防灾国家重点实验室

Author(s):

DU Yong¹;  LI Guo-qiang²

1.College of Architecture and Urban Planning, Nanjing University of Technology, Nanjing 210009, China; 2.State Key Laboratory of Disaster Prevention in Civil Engineering, Tongji University, Shanghai 200092, China

关键词:

网架结构;  临界温度;  弹性支座;  有限元模型

Keywords:

grid structure;  critical temperature;  elastic support;  finite element method

分类号:

TU356

DOI:

10.11830/ISSN.1000-5013.2009.04.0458

文献标志码:

A

摘要:

常温下基于有限元法的网架分析设计程序较多,但均未考虑高温下钢材物理性能和力学性能的变化,以及支座约束对网架受力性能的影响.为了较真实地模拟网架在火灾中的力学行为,在ANSYS有限元分析程序的单元库、材料模型库基础上,构建符合网架结构力学模型和进行瞬态热分析的数值分析模型,并验证该数值分析模型对网架在火灾中力学反应分析的准确性,为研究网架结构在火灾中全过程反应提供切实可行的分析工具.

Abstract:

A number of finite element method(FEM) software to analyze the grid structures at normal temperature don’t take account of the influence of high temperature on material properties,mechanical properties and support restraint.In order to simulate more accurately the mechanical responses of grid structures in fire,a grid structural model is built from the element library and material table of FEM ANSYS software.This numerical model based on ANSYS f can carried out the mechanical analysis and the transient heat analysis precisely,and the computer method will become an effective tool to evaluate the grid structure response through the whole fire.

备注/Memo

备注/Memo:

国家科技部科研基金资助项目(2005BA908B12)

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更新日期/Last Update: 2014-03-23