|本期目录/Table of Contents|

[1]张壮南,杨 玥,李海平.火灾下柱失效对多层钢框架连续倒塌的影响[J].建筑科学与工程学报,2018,35(05):203-210.
 ZHANG Zhuang-nan,YANG Yue,LI Hai-ping.Influence of Column Failure on Progressive Collapse of Multi-story Steel Frames Under Fire[J].Journal of Architecture and Civil Engineering,2018,35(05):203-210.
点击复制

火灾下柱失效对多层钢框架连续倒塌的影响(PDF)
分享到:

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

卷:
35卷
期数:
2018年05期
页码:
203-210
栏目:
出版日期:
2018-09-03

文章信息/Info

Title:
Influence of Column Failure on Progressive Collapse of Multi-story Steel Frames Under Fire
作者:
张壮南杨 玥李海平
沈阳建筑大学土木工程学院
Author(s):
ZHANG Zhuang-nan, YANG Yue, LI Hai-ping
School of Civil Engineering, Shenyang Jianzhu University
关键词:
火灾钢框架结构连续倒塌生死单元法有限元分析
Keywords:
fire steel frame structure progressive collapse birth and death element method finite element analysis
分类号:
-
DOI:
-
文献标志码:
A
摘要:
针对钢结构抗连续性倒塌分析中多数采用直接拆柱法,不能真实反映由于火灾引起钢结构发生连续性倒塌时的实际情况,用ANSYS有限元软件建立无楼板的多层钢框架模型,选取已有文献中角部区域不同失效柱个数的工况。采用热固耦合法,考虑火灾使柱失效和材料非线性、几何非线性进行分析。研究了火灾下钢框架结构抗连续倒塌性能及角部区域允许失效柱个数,并将分析结果与已有文献采用直接拆除法结果进行对比。结果表明:采用ANSYS中热结构耦合功能,结合生死单元法能够较好模拟钢框架由于火灾导致结构发生连续性倒塌的过程;通过分析3种角部区域不同失效柱个数的工况结果,得出失效柱允许个数为3根;与现有文献采用直接拆除法的有限元分析结果进行对比,发现采用直接拆除法分析结果过于保守,考虑火灾导致柱失效更加贴近实际倒塌情况。
Abstract:
In the analysis of continuous collapse of steel structure, the direct demolition method was mostly used, but because of the continuous collapse of steel structure was caused by fire, the actual situation could not be truly reflected. Therefore, it was very important to analyze the resistance of steel structure to continuous collapse under fire. A multilayer steel frame model without floor was established by using ANSYS finite element software. The thermal and solid coupling method was used to consider the failure of fire, and the material nonlinearity and geometric nonlinearity were taken into account comprehensively. The continuous collapse resistance of steel frame structures under fire and the number of allowable failure columns in the corner region were studied, and the results were compared with the results of direct dismantling method used in the existing literature. The results show that the continuous collapse process of steel frame can be simulated by the method of thermal structural coupling in ANSYS, combined with the method of life and death unit. By analyzing the working conditions of different number of failure columns in 3 kinds of corner regions, the number of allowable numbers of the failure columns is 3. The results of the finite element analysis of dismantling method and the results of finite element analysis are compared. It is found that the result of direct dismantling is too conservative. Considering the fire is more close to the actual collapse situation.

参考文献/References:

相似文献/References:

[1]李 明,王玉银,孙建运,等.火灾下腹板开孔轻钢龙骨墙体温度场数值模拟分析[J].建筑科学与工程学报,2015,32(03):89.
 LI Ming,WANG Yu-yin,SUN Jian-yun,et al.Numerical Simulation Analysis of Thermal Distribution of Slotted Light-gauge Steel Stud Walls Exposed to Fire[J].Journal of Architecture and Civil Engineering,2015,32(05):89.
[2]王培军,刘昌斌,杨振民.截面温度不均匀对受约束波纹腹板梁火灾下悬链线效应的影响[J].建筑科学与工程学报,2016,33(06):53.
 WANG Pei-jun,LIU Chang-bin,YANG Zhen-min.Effects of Non-uniform Temperature Distribution Across Section on Catenary Action of Restrained Corrugated Web Beam in Fire[J].Journal of Architecture and Civil Engineering,2016,33(05):53.
[3]李俊华,于长海,唐跃锋,等.CFRP布加固火灾后钢筋混凝土柱的试验研究[J].建筑科学与工程学报,2011,28(04):48.
 LI Jun-hua,YU Chang-hai,TANG Yue-feng,et al.Experimental Research on Rehabilitation with CFRP Sheets for ReinforcedConcrete Columns After Exposure to Fire[J].Journal of Architecture and Civil Engineering,2011,28(05):48.
[4]余志武,何红霞,余峰.商业大楼火灾后的加固处理[J].建筑科学与工程学报,2007,24(01):17.
 YU Zhi-wu,HE Hong-xia,YU Feng.Strengthening Process of Commercial Building After Conflagration[J].Journal of Architecture and Civil Engineering,2007,24(05):17.
[5]靳飞,李国强.全盛期室内火灾参数化模型的参数随机性[J].建筑科学与工程学报,2006,23(04):44.
 JIN Fei,LI Guo-qiang.Parameters Randomness of Parametric Model of Fully-Developed Compartment Fire[J].Journal of Architecture and Civil Engineering,2006,23(05):44.
[6]张玉琢,吕学涛,李晓婷.中空夹层方钢管再生混凝土柱火灾后剩余承载力[J].建筑科学与工程学报,2019,36(01):76.
 ZHANG Yu-zhuo,LU Xue-tao,LI Xiao-ting.Residual Bearing Capacity of Hollow Sandwich Square Steel Tube Recycled Concrete Column After Fire[J].Journal of Architecture and Civil Engineering,2019,36(05):76.
[7]钟炜辉,张驰,邱帅子,等.地震作用下钢框架结构抗竖向连续倒塌可靠度分析[J].建筑科学与工程学报,2022,39(03):55.[doi:10.19815/j.jace.2021.09110]
 ZHONG Wei-hui,ZHANG Chi,QIU Shuai-zi,et al.Vertical Anti-progressive Collapse Reliability Analysis of Steel Frame Under Seismic Action[J].Journal of Architecture and Civil Engineering,2022,39(05):55.[doi:10.19815/j.jace.2021.09110]

备注/Memo

备注/Memo:
更新日期/Last Update: 2018-09-03