非线性系统
可塑性
平面的
有限元法
结构工程
流离失所(心理学)
应变硬化指数
梁(结构)
材料科学
计算机科学
工程类
物理
复合材料
心理学
计算机图形学(图像)
量子力学
心理治疗师
作者
Phu-Cuong Nguyen,Seung-Eock Kim
出处
期刊:Steel and Composite Structures
[Techno-Press]
日期:2016-08-10
卷期号:21 (5): 1121-1144
被引量:21
标识
DOI:10.12989/scs.2016.21.5.1121
摘要
This paper presents a displacement-based finite element procedure for second-order distributed plasticity analysis of planar steel frames with semi-rigid beam-to-column connections under static loadings. A partially strain-hardening elastic-plastic beam-column element, which directly takes into account geometric nonlinearity, gradual yielding of material, and flexibility of semi-rigid connections, is proposed. The second-order effects and distributed plasticity are considered by dividing the member into several sub-elements and meshing the cross-section into several fibers. A new nonlinear solution procedure based on the combination of the Newton-Raphson equilibrium iterative algorithm and the constant work method for adjusting the incremental load factor is proposed for solving nonlinear equilibrium equations. The nonlinear inelastic behavior predicted by the proposed program compares well with previous studies. Coupling effects of three primary sources of nonlinearity, geometric imperfections, and residual stress are investigated and discussed in this paper.
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