Shear-Flexible Steel-Concrete Composite Beams in Partial Interaction: Closed-Form “Exact” Expression of the Stiffness Matrix
Shear-Flexible Steel-Concrete Composite Beams in Partial Interaction: Closed-Form “Exact” Expression of the Stiffness Matrix
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DOI：
10.1061/(asce)em.1943-7889.0000320
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
E. Martinelli;C. Faella;G. Palma
中科院分区：
文献类型：
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作者：
E. Martinelli;C. Faella;G. Palma
本文提出了一种分析钢-混凝土组合梁局部相互作用的理论模型。混凝土板和钢梁都是根据Timoshenko的理论建模的，并且两个连接构件之间考虑了连续的线性剪切连接。对两个连通构件的位移场考虑了简化的运动学假设，从而推导出一个模型，该模型既一般，又简单，易于处理，实际上可以用封闭形式求解。等效节点力的刚度矩阵和矢量的解析表达式是本文的主要成果。它们完全定义了上述模型的“精确”有限元，并且可以很容易地用于对钢-混凝土组合梁进行计算效率分析，同时考虑结构构件的剪切柔韧性和两个连接构件之间界面发生的滑移的影响. ...
This paper presents a theoretical model for analyzing shear-flexible steel-concrete composite beams in partial interaction. Both concrete slab and steel beam are modeled according to Timoshenko’s theory, and a continuous linear-behaving shear connection is considered between the two connected members. Simplified kinematic assumptions have been considered for the displacement fields of the two connected members to derive a model, which is at one time rather general, but even simple enough to be easily handled and actually solved in closed-form. The analytical formulation of both stiffness matrix and vector of equivalent nodal forces is the key achievement of the present paper. They completely define an “exact” finite element for the mentioned model and can be easily employed for carrying out computationally efficient analyses of steel-concrete composite beams looking after the effect of both shear flexibility of the structural members and slips occurring at the interface between the two connected members. ...