The paper develops a numerical investigation on the behavior of steel-concrete composite beam curved in plan to examine the effect of the various parameters. Three-dimensional finite element analysis (FEA) is employed using a commercial software, ABAQUS. The geometric and material nonlinearities are utilized to simulate the composite beam under a monotonic load. The FEA efficiency has been proved by comparing the numerical results with experimental tests obtained from previous literature, including load-deflection curves, ultimate load, ultimate and failure deflection, and cracks propagation. The validated models are used to assess some of the key parameters such the beam span/radius ratio, web stiffeners, partial interaction, concrete compressive strength, and steel beam yield stress. From the obtained results, it is noticed that the span/radius of curvature ratio influences the loading capacity, the beam yielding (i.e. the beam yield at an early stage) when the span/radius ratio increases and inelastic behavior developed early of the beam due to the torsional effect. The presence of web stiffeners with different locations in the curve composite beam affected the shear strength. The web twisting and vertical separation at the beam mid-span are observed to decrease as the number of the stiffeners increase due to the decrease in the beam torsion incorporating with transferring the failure to the concrete slab. Furthermore, the partial interaction and steel beam yield stress developed in this study appear to have a remarkable effect on beam capacity. KeywordsComposite beam, FEA modeling, Web stiffeners, Partial interaction, Span/radius ratio, Vertical separation.

中文翻译：

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单调荷载作用下弯钢混凝土组合梁的受力性能

本文对计划中的钢混凝土组合梁的性能进行了数值研究，以检验各种参数的影响。使用商业软件ABAQUS进行三维有限元分析（FEA）。利用几何和材料非线性来模拟单调载荷下的复合梁。通过将数值结果与以前的文献进行的实验测试（包括载荷-挠度曲线，极限载荷，极限和破坏挠度以及裂纹扩展）进行比较，证明了FEA效率。经过验证的模型用于评估一些关键参数，例如梁跨度/半径比，腹板加劲肋，局部相互作用，混凝土抗压强度和钢梁屈服应力。根据获得的结果，注意到，当跨度/半径比增加时，曲率比的跨度/半径比会影响载荷能力，梁的屈服（即早期的梁屈服）以及由于扭转效应而在梁的早期产生非弹性行为。弯曲复合梁中不同位置的腹板加劲肋的存在会影响抗剪强度。观察到梁的中跨处的腹板扭曲和垂直分离随着加强筋数量的增加而减少，这是由于梁扭转的减少以及将破坏转移到混凝土板上而引起的。此外，在这项研究中开发的局部相互作用和钢梁屈服应力似乎对梁的承载能力有显着影响。关键词：复合梁，有限元分析，腹板加劲肋，局部相互作用，跨度/半径比，