支撑布置对火灾下钢框架结构抗连续性倒塌性能影响研究

姜健; 李国强

doi:10.13409/j.cnki.jdpme.2016.03.011

您当前的位置：

首页 >

文章列表页 >

支撑布置对火灾下钢框架结构抗连续性倒塌性能影响研究

钢结构抗火 | 更新时间：2025-12-11

- 支撑布置对火灾下钢框架结构抗连续性倒塌性能影响研究
- Influence of Bracing Systems on the Fire Resistance of Steel Frames against Progressive Collapse
- 防灾减灾工程学报 2016年36卷第3期页码：394-398
- 作者机构：
- 作者简介：
- 基金信息：
  
  国家自然科学基金重大国际合作项目（51120185001）;国家自然科学基金青年基金项目（51408418）资助
- DOI：10.13409/j.cnki.jdpme.2016.03.011
  中图分类号： U391;TU312.3
- 纸质出版：2016
- 稿件说明：
移动端阅览
[1]姜健,李国强.支撑布置对火灾下钢框架结构抗连续性倒塌性能影响研究[J].防灾减灾工程学报,2016,36(03):394-398.

姜健, 李国强. Influence of Bracing Systems on the Fire Resistance of Steel Frames against Progressive Collapse[J]. 2016, 36(3): 394-398.
[1]姜健,李国强.支撑布置对火灾下钢框架结构抗连续性倒塌性能影响研究[J].防灾减灾工程学报,2016,36(03):394-398. DOI： 10.13409/j.cnki.jdpme.2016.03.011.

姜健, 李国强. Influence of Bracing Systems on the Fire Resistance of Steel Frames against Progressive Collapse[J]. 2016, 36(3): 394-398. DOI： 10.13409/j.cnki.jdpme.2016.03.011.

摘要

研究了支撑布置对火灾下钢框架结构抗连续性倒塌性能的影响。考虑水平和竖向两种支撑布置形式

前者沿水平向布置在结构顶部

后者布置在结构各楼层

分别考虑其布置在结构边缘或者内部的情况。应用OpenSees软件对某7跨8层平面钢框架结构模型进行了数值分析。结果表明

火灾下结构倒塌始于受火柱的屈曲

该局部破坏向周边传播

导致整体结构下沉式倒塌或侧向倾覆式倒塌。竖向支撑可有效抑制结构的侧向倒塌

但容易导致底层柱的依次屈曲

不建议单独使用;通过将竖向支撑布置在结构内部

可有效阻止破坏向周边结构传播;水平支撑通过平均分配各柱轴压力

有效抑制周边柱的压曲

但容易造成结构局部或是整体侧向倒塌;同时应用两种支撑可有效提高结构抗倒塌性能。

Abstract

This paper studies the effect of bracing layout on the resistance of steel frames against fire-induced progressive collapse.Two types of bracing systems（horizontal and vertical）are considered.The horizontal bracings are arranged horizontally on the top of the frame and the vertical ones are placed along the height either on the edge or in the interior.A 7span-8storey plane steel frame is numerically modeled in the finite element software OpenSees.The results show that the progressive collapse of structures in fire is triggered by the buckling of heated columns.In general

its collapse mechanism is either in the form of global downward or a global lateral collapse.Vertical bracings can effectively resist the lateral drift of frames but may lead to successive failure of columns which should be prevented.An interior arrangement of vertical bracings can prevent the spread of the local failure to surrounding structures.Hat bracings can avoid the sequential buckling of columns by uniformly distributing the loads on all the columns

but are prone to cause local or global lateral collapse.Therefore

a combined bracing system is recommended.

关键词

Keywords

references

基于OpenSees的火灾下钢结构连续性倒塌分析 [J]. 姜健,Asif Usmani,李国强. 防灾减灾工程学报 . 2015(01)

多高层钢结构耐火性能的子结构分析模型与分析方法 [J]. 陈适才,田小明,田相凯. 防灾减灾工程学报 . 2012(S1)

火灾下工程结构连续性倒塌分析与设计方法探讨 [J]. 李耀庄,苏玲红,吴小华. 灾害学 . 2010(01)

OpenSees Software Architecture for the Analysis of Structures in Fire [J] . Jian Jiang,Liming Jiang,Panagiotis Kotsovinos,Jian Zhang,Asif Usmani,Frank McKenna,Guo-Qiang Li. Journal of Computing in Civil Engineering . 2013

Modeling of steel frame structures in fire using OpenSees [J] . Jian Jiang,Asif Usmani. Computers and Structures . 2012

Tall building collapse mechanisms initiated by fire: Mechanisms and design methodology [J] . Engineering Structures . 2011

Progressive collapse analysis of steel structures under fire conditions [J] . Ruirui Sun,Zhaohui Huang,Ian W Burgess. Engineering Structures . 2011

Robustness of steel-composite building structures subject to localised fire [J] . C. Fang,B.A. Izzuddin,A.Y. Elghazouli,D.A. Nethercot. Fire Safety Journal . 2011 (6)

Progressive collapse of multi-storey buildings due to sudden column loss — Part I: Simplified assessment framework [J] . B.A. Izzuddin,A.G. Vlassis,A.Y. Elghazouli,D.A. Nethercot. Engineering Structures . 2007 (5)

How did the WTC towers collapse: a new theory [J] . A.S. Usmani,Y.C. Chung,J.L. Torero. Fire Safety Journal . 2003 (6)

A suggested cause of the fire-induced collapse of the World Trade Towers [J] . J.G Quintiere,M di Marzo,R Becker. Fire Safety Journal . 2002 (7)

浏览量

214

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

局部喷水急速冷却下完全约束火灾高温钢梁力学响应行为

单支撑深基坑围护结构及坑外土体变形分析

底面受火预应力混凝土空心板耐火性能的有限元分析

高温下异形截面薄壁铝合金轴压构件局部-畸变屈曲耦合分析

钢筋混凝土叠层空腹桁架转换结构热力耦合反应分析