Progressive Collapse Nonlinear Analysis on Composite Frames with CFST Columns Based on Static-dynamic Analytic Conversion Procedure in Fires

doi:10.15961/j.jsuese.201600907

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	Progressive Collapse Nonlinear Analysis on Composite Frames with CFST Columns Based on Static-dynamic Analytic Conversion Procedure in Fires
	Wang, Jingxuan 1,2; Wang, Wenda 1,2; Li, Huawei 1
刊名	Gongcheng Kexue Yu Jishu/Advanced Engineering Science
	2017-07-20
卷号	49 期号:4 页码:53-60
关键词	ABAQUS Fire resistance Nonlinear analysis Static analysis Steel fibers Structural frames Tubular steel structures Unloading Concrete filled steel tube Conversion procedures Fiber beam elements Fire response Progressive collapse
ISSN号	20963246
DOI	10.15961/j.jsuese.201600907
英文摘要	Fire induced collapse failure mode is different from other instantaneous collapse, such as that induced by earthquake, impacting or exploding. The whole collapse is a combination of complex processes including quasi-static equilibrium and dynamic process. In order to research the nonlinear dynamic response of progressive collapse analysis on the composite frame with concrete filled steel tubular (CFST) columns and RC slabs due to local fire. A static-dynamic analytic conversion procedure has been developed based on the restart and predefined-field function in the finite element code ABAQUS. This paper presents a FE model of 9-story composite spatial frame to investigate the mechanism of progressive collapse when 6th corner floor catches fire. The composite frame members of columns and steel beams used nonlinear fiber beam elements, and RC slabs used layered shell elements. The user-defined uniaxial constitutive material models of core concrete and steel were incorporated in subprogram UMAT. The results showed that the analytic procedure switch between static and dynamic analysis was effective to investigate the progressive collapse of composite frame subjected to fire, and it could shorten the calculation time and show the dynamic characteristics of progressive collapse. Local progressive collapse was observed in the composite frame when the corner column was destroyed. Collapse critical fire resistance time was 253 min (4.2 h), greater than the individual component. The displacement of top column included five stages when it was subjected to fire, including inflation deformation in early heating stage, localized failure of heated columns, transient equilibrium phase, unloading phase and the localized collapse phase. The first four stages were long quasi-static analysis and the fifth stage was a nonlinear dynamic problem. The redistribution of internal forces during unloading followed the "shortest path principle" in general. © 2017, Editorial Department of Advanced Engineering Sciences. All right reserved.
语种	中文
出版者	Editorial Department of Journal of Sichuan University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114564]
专题	土木工程学院
作者单位	1.School of Civil Eng., Lanzhou Univ. of Technol., Lanzhou; 730050, China; 2.Western Center of Disaster Mitigation in Civil Eng. of Ministry of Education, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Jingxuan,Wang, Wenda,Li, Huawei. Progressive Collapse Nonlinear Analysis on Composite Frames with CFST Columns Based on Static-dynamic Analytic Conversion Procedure in Fires[J]. Gongcheng Kexue Yu Jishu/Advanced Engineering Science,2017,49(4):53-60.
APA	Wang, Jingxuan,Wang, Wenda,&Li, Huawei.(2017).Progressive Collapse Nonlinear Analysis on Composite Frames with CFST Columns Based on Static-dynamic Analytic Conversion Procedure in Fires.Gongcheng Kexue Yu Jishu/Advanced Engineering Science,49(4),53-60.
MLA	Wang, Jingxuan,et al."Progressive Collapse Nonlinear Analysis on Composite Frames with CFST Columns Based on Static-dynamic Analytic Conversion Procedure in Fires".Gongcheng Kexue Yu Jishu/Advanced Engineering Science 49.4(2017):53-60.