Nonlinear finite element analysis on mechanical performance of concrete filled steel tubular frame structure

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	Nonlinear finite element analysis on mechanical performance of concrete filled steel tubular frame structure
	Wang, Wenda1,2 ; Han, Linhai 2
	2008-12-01
发表期刊	Jianzhu Jiegou Xuebao/Journal of Building Structures
ISSN	10006869
卷号	29 期号:6 页码:75-83
摘要	The nonlinear finite element analysis (FEA) on mechanical behaviour of composite frame which composed of concrete filled steel tubular (CFST) columns and steel beam under sustaining axial load and lateral loads was carried out. The material and geometric nonlinearities were considered. The stress-strain relationship of core concrete was given under confinement effect by the outside steel tubes. The stress-strain curves was second-order elastic-plastic model or linear aggrandizement model. The geometric stiffness matrix and updated coordinate strategy were adopted to describe the geometric nonlinearity of the frame. The relationship between displacements of the CFST frame before and after deformation was based on Approximate Updated Lagrange (AUL) description. The increment equilibrium equations were found on virtual work principle. The nonlinear equations were solved by displacement increment method. The calculated results agree well with the tested results. The results show that the finite element analysis based on fiber beam-column elements was reasonable to predict the performance of CFST frames because the method can consider the yield and plastic extending within the sections and along the elements. The initial imperfect and residual stress can be included too. Parametric study was performed based on the FEA model and some useful conclusions were obtained for correlative researcher and designer.
关键词	Concretes Control nonlinearities Elastoplasticity Geometry Nonlinear analysis Nonlinear equations Stiffness matrix Stress-strain curves Structural frames Tubular steel structures Concrete-filled steel tubular Frame structure Geometric non-linear Material nonlinear Parametric study
收录类别	EI
语种	中文
出版者	Science Press
EI入藏号	20090311865091
EI主题词	Finite element method
EI分类号	408.2 Structural Members and Shapes - 412 Concrete - 731.1 Control Systems - 921 Mathematics
来源库	Compendex
分类代码	408.2 Structural Members and Shapes - 412 Concrete - 731.1 Control Systems - 921 Mathematics
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/111944
专题	土木工程学院
作者单位	1.College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2.Department of Civil Engineering, Tsinghua University, Beijing 100084, China
第一作者单位	土木工程学院
第一作者的第一单位	土木工程学院
推荐引用方式 GB/T 7714	Wang, Wenda,Han, Linhai. Nonlinear finite element analysis on mechanical performance of concrete filled steel tubular frame structure[J]. Jianzhu Jiegou Xuebao/Journal of Building Structures,2008,29(6):75-83.
APA	Wang, Wenda,&Han, Linhai.(2008).Nonlinear finite element analysis on mechanical performance of concrete filled steel tubular frame structure.Jianzhu Jiegou Xuebao/Journal of Building Structures,29(6),75-83.
MLA	Wang, Wenda,et al."Nonlinear finite element analysis on mechanical performance of concrete filled steel tubular frame structure".Jianzhu Jiegou Xuebao/Journal of Building Structures 29.6(2008):75-83.