Simplified nonlinear response simulation of composite steel–concrete beams and CFST columns
Simplified nonlinear response simulation of composite steel–concrete beams and CFST columns
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DOI：
10.1016/j.engstruct.2010.04.050
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发表时间：
2010-09
影响因子：
5.5
通讯作者：
Huiling Zhao;S. Kunnath;Yong Yuan
中科院分区：
文献类型：
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作者：
Huiling Zhao;S. Kunnath;Yong Yuan
研究了一种计算效率高的钢-混凝土组合梁-钢管混凝土柱组合结构节点非线性性能的宏模型方法。提出的组合梁模型，验证使用四个全尺寸组合梁试验，包括部分之间的相互作用的混凝土板和钢梁。钢管混凝土柱模型采用基于纤维的应力-应变关系，可以考虑约束混凝土的强度和延性以及钢管的局部屈曲。钢管混凝土组合梁-柱节点的柔性被模拟为一个节点区域。简化方法的有效性进行了评估，通过比较的整体响应和局部行动与那些从测试结果获得。所提出的方法被证明是可行的复合材料结构的非线性分析，其中的建模策略是服从现代非线性结构分析软件中的可用功能。
A computationally efficient macromodeling scheme to simulate the nonlinear behavior of composite structural connections consisting of steel–concrete composite beams and concrete-filled steel tubular (CFST) columns is investigated. The model proposed for composite beams, validated using four full scale composite beam tests, incorporates partial interaction between the concrete slab and the steel beam. The model proposed for CFST columns adopts fiber-based stress–strain relations that enable the consideration of strength and ductility for confined concrete and local buckling of the steel tube. The flexibility of the composite-beam-to-CFST-column connection is modeled as a panel zone. The validity of the simplified approach is evaluated by comparison of both overall response and local actions with those obtained from test results. The proposed methodology is shown to be viable for nonlinear analysis of composite structures wherein the modeling strategies are amenable to available features in modern nonlinear structural analysis software.