Abstract
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.
Highlights
Conventional composite steel-concrete construction is vastly utilized around the world as one of the most economical constructions in the civil engineering structures
The results demonstrated that the formulation was effective and accurate to captivate the behavior of such beams with high effectiveness finite element (FE)
Three-dimensional FEM are developed to simulate composite steel–concrete beams curved in plan, as previous studies have failed to study the inelastic behavior of such beams under static loading when changing the various beam properties
Summary
Conventional composite steel-concrete construction is vastly utilized around the world as one of the most economical constructions in the civil engineering structures. A parametric study that is not well covered in literature is accomplished to investigate the effects on the composite steel-concrete beams performance of transverse web stiffeners, concrete slab compressive strength, yield stress of steel beam, shear connectors and radius of curvature. 3-D finite element models using commercial software ABAQUS/Standard 2017 are adapted to simulate the behavior of curved steel-concrete composite beam, taking into account geometry and materials nonlinearities. The curvature of curved composite beam, the compressive strength of concrete slab, the transverse web stiffeners, the shear connector ratio, and the yield stress of steel beam are investigateded in this parametric study. In the finite element model, the behavior of the reinforcement bars, the steel beam and stud shear connectors are similar using a bilinear stress-strain curve, representing elastic-plastic material with strain hardening.
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