A novel theoretical method of elastic bending deformation of steel-concrete composite beams based on trigonometric series solution
The current bending deformation calculation formula for steel-concrete composite beams considering interface slip effects lacks wide adaptability and is inconvenient for the structural design.To address this issue,a triangular series was used to characterize the displacement function of elastic bending deformation and interface slip of composite beams,and a theoretical calculation model of elastic bending deformation and interface slip was derived for simply supported composite beams under different loading conditions based on the principle of minimum potential energy and variational method.Consequently,a unified explicit solution for the bending stiffness and interface slip value of composite beams was obtained.The effectiveness and accuracy of the proposed method were verified against with a large number of experimental results and existing calculation methods.The results showed that the bending stiffness calculation formula for steel-concrete composite beams derived from the triangular series solution was concise,intuitive,and physically meaningful,and the results were reliable.Therefore,the proposed novel method can accurately calculate the bending deformation of composite beams in serviceability limit state.
steel-concrete composite beaminterface slipbending deformationtrigonometric series solutionunified calculation formula
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