[1]孙伟建,高轩能,张惠华.支承形式对正放四角锥网架抗火性能的影响[J].华侨大学学报(自然科学版),2013,34(4):444-448.[doi:10.11830/ISSN.1000-5013.2013.04.0444]
　SUN Wei-jian,GAO Xuan-neng,ZHANG Hui-hua.Fire-Resistant Behavior of Square Pyramid Space Trusses under Different Support Conditions[J].Journal of Huaqiao University(Natural Science),2013,34(4):444-448.[doi:10.11830/ISSN.1000-5013.2013.04.0444]
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支承形式对正放四角锥网架抗火性能的影响()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第34卷
期数:
2013年第4期
页码:
444-448
栏目:
出版日期:
2013-07-20

文章信息/Info

Title:
Fire-Resistant Behavior of Square Pyramid Space Trusses under Different Support Conditions
文章编号:
1000-5013(2013)04-0444-05
作者:
孙伟建;  高轩能;  张惠华
华侨大学 土木工程学院, 福建 厦门 361021
Author(s):
SUN Wei-jian;  GAO Xuan-neng;  ZHANG Hui-hua
College of Civil Engineering, Huaqiao University, Xiamen 361021, China
关键词:
正放四角锥网架;  抗火性能;  支承形式;  弹簧刚度;  温度场;  数值模拟
Keywords:
square pyramid space trusses;  fire-resistant behavior;  support conditions;  spring stiffness;  temperature field;  numerical simulation
分类号:
TU356
DOI:
10.11830/ISSN.1000-5013.2013.04.0444
文献标志码:
A
摘要:
采用ANSYS非线性有限元分析软件,建立正放四角锥网架在高大空间火灾作用下的热-结构耦合有限元计算模型.考虑边界不同支座弹簧刚度的影响,对该模型在火灾均匀温度场中的全过程反应进行数值模拟计算,同时研究均匀升温条件下杆件的内力变化情况.结果表明:采用不同支承形式时,无论法向弹簧刚度多大,周边支承形式的网架结构临界温度均最高,具有更优越的抗火性能;采用同种支承形式的正放四角锥网架时,其法向弹簧刚度越大,临界温度越高;在升温过程中,法向弹簧刚度大小对同一上弦杆内力影响较小;均匀升温条件下,各上弦杆件内力呈现出由角部向跨中先减小后逐渐增大,沿网架边界由角部向中间逐渐减小的变化趋势,随着弹簧刚度的增大,内力最大杆的位置由角部转移到跨中.
Abstract:
To investigate the fire-resistant behavior of square pyramid space trusses under different support conditions, a numerical fire-structure coupling analysis model under the large space fire was established by the nonlinear finite element software ANSYS. Considering the influence of different constraint sping stiffness, the whole process response of square pyramid space trusses in uniform temperature field was simulated, and the internal forces were calculated. The numerical results show that the square pyramid space trusses with surrounding support conditions has the highest critical temperature irrelevant to the value of spring stiffness, which shows superior fire-resistant behavior; and the critical temperature of square pyramid space trusses increases with increasing the spring stiffness for a certain support condition. The spring stiffness influences slightly the internal force of a same upper chord during the temperature increment. Under uniform temperature field, the internal force of upper chords presents a tendency of the initial decrease, but increase after reaching a minimum from the corner to the span centre; and presents a tendency of gradual decrease along the boundary from the corner to the middle position. The position of the upper chord member with maximum internal force is transferred from the corner to the span center with increasing the spring stiffness.

参考文献/References:

[1] BUCHANAN A H.Structural design for fire safety[M].[s.l.]:John Wiley & Sons LTD,2001:73-97.
[2] WAKD F L.Experimental behavior of a steel structure under natural fire[J].Fire Safety Journal,2006,41(7):509-522.
[3] LAMONT S.Behavior of structures in fire and real design-A case study[J].Journal of Fire Protection Engineering,2006,16(5):5-35.
[4] WANG Y C,LENNON T,MOORE D B.The behavior of Steel frames subject to fire[J].J Construct Steel Res,1995,35(3):291-322.
[5] RICHARD J Y.Advanced analysis and behaviour of steel structures in fire[M].[s.l.]:John Wiley & Sons LTD,2001:57-91.
[6] 李国强,陈凯.门式钢刚架结构实用抗火设计方法[J].建筑结构,2001,31(6):14-18.
[7] 白音.大空间钢结构火灾下受力性能与抗火计算方法研究[D].北京:清华大学,2008:66-80.
[8] 刘国军.预应力组合网架结构的性能化抗火研究[D].厦门:华侨大学,2010:40-71.
[9] 杜咏.大空间建筑网架结构实用抗火设计方法[D].上海:同济大学,2007:101-112.
[10] 中国工程建设标准化协会.CECS 200: 2006建筑钢结构防火技术规范[S].北京:中国计划出版社,2006:9-11.
[11] 李国强,韩林海,楼国彪,等.钢结构及钢-混凝土组合结构抗火设计[M].北京:中国建筑工业出版社, 2006:149-150.

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备注/Memo

备注/Memo:
收稿日期: 2012-12-07
通信作者: 高轩能(1962-),男,教授,主要从事钢结构及工程结构灾害控制的研究.E-mail:gaoxn117@sina.com.
基金项目: 国家自然科学基金资助项目(51278208); 福建省科技计划重大项目(2012Y4010); 中央高校科研业务费专项基金资助项目(JB-JC1005)
更新日期/Last Update: 2013-07-20