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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

28卷

期数:

2011年01期

页码:

16-19

栏目:

出版日期:

2011-03-20

文章信息/Info

Title:

Simplified Model for Lateral Displacement of Steel Staggered-truss Structure Under High Temperature

作者:

陈长坤^1,2,张冬²

1. 中国科学技术大学 火灾科学国家重点实验室,安徽 合肥 230026; 2. 中南大学 防灾科学与安全技术研究所,湖南 长沙 410075

Author(s):

CHEN Chang-kun^1,2, ZHANG Dong²

1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, China; 2. Institute of Disaster Prevention Science and Safety Technology, Central South University, Changsha 410075, Hunan, China

关键词:

钢结构;  交错桁架;  火灾;  抗侧刚度;  侧移

Keywords:

steel structure;  staggered-truss;  fire;  lateral stiffness;  lateral displacement

分类号:

TU998.12

DOI:

-

文献标志码:

A

摘要:

结合钢交错桁架结构的特点,提出了其在火灾高温作用下的三折线简化模型,并对高温作用下结构的侧移变化特征和高温引起的附加倾覆力矩进行了分析,给出了相应的理论表达式; 结合有限元法,通过具体算例对该模型进行了验证。结果表明:侧移简化模型能较好地描述钢交错桁架结构在水平荷载和高温作用下的侧向变形情况; 结构侧移和附加倾覆力矩计算方法简便可行,并具有较好的精度。

Abstract:

A three-segment simplified model was presented for describing the lateral displacement of steel staggered-truss framing system subjected to high temperature according to the structural attributes. Both the structural lateral displacements and the additional overturning moment induced by high temperature were analyzed, and the corresponding calculation methods were proposed. Furthermore, associated with the finite element method, a case was given for clarifying the above method. Results show that the proposed simplified model can describe the lateral deformation of steel staggered-truss structure under lateral force and high temperature well. The calculation methods for the lateral displacement of structure and the additional overturning moment are relative simple, feasible, and have considerable precision.

参考文献/References:

[1] KIM J K,LEE J H,KIM Y M.Inelastic Behavior of Staggered Truss Systems[J].The Structural Design of Tall and Special Buildings,2007,16(1):85-105.
[2]周绪红,莫 涛,刘永健,等.高层钢结构交错桁架结构的试验研究[J].建筑结构学报,2006,27(5):86-92. ZHOU Xu-hong,MO Tao,LIU Yong-jian,et al.Experimental Study on High-rise Staggered Truss Steel Structure[J].Journal of Building Structures,2006,27(5):86-92.
[3]莫 涛.钢结构交错桁架体系的弹塑性全过程分析理论与试验研究[D].长沙:湖南大学,2005. MO Tao.Elastic-plastic Analysis Theory and Experiment Research on Steel Staggered Truss System[D].Changsha:Hunan University,2005.
[4]李国强,蒋首超,林桂祥.钢结构抗火计算与设计[M].北京:中国建筑工业出版社,1999. LI Guo-qiang,JIANG Shou-chao,LIN Gui-xiang.Fire Resistance Calculation and Design for Steel Structures[M].Beijing:China Architecture & Building Press,1999.
[5]CHEN C K,XIAO R,ZHANG D.3-D Finite Element Analysis of the Response Behaviors of Steel Staggered-Truss Framing System at Local Elevated Temperatures[C]//LI S C,WANG Y J,AN Y,et al.Progress in Safety Science and Technology.Beijing:Science Press,2008:769-773.
[6]陈长坤,肖 荣,张 鹏.火灾作用下钢交错桁架结构体系的力学响应分析[J].火灾科学,2008,17(3):131-136. CHEN Chang-kun,XIAO Rong,ZHANG Peng.Mechanical Response Analysis of Steel Staggered-truss System Under Fire Conditions[J].Fire Safety Science,2008,17(3):131-136.
[7]Steel Design Guide Series 14,Staggered Truss Framing System[S].
[8]EN 1993-1-2:2005,Eurocode 3:Design of Steel Structures.Part 1.2:General Rules,Structural Fire Design[S].

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备注/Memo

备注/Memo:

收稿日期:2010-11-18
基金项目:国家自然科学基金项目(50706059); 火灾科学国家重点实验室开放基金项目(HZ2009-KF05)
作者简介:陈长坤(1977-),男,福建福安人,中南大学教授,工学博士,E-mail:cckchen@mail.csu.edu.cn。

常用功能

更新日期/Last Update: 2011-03-20