The Study of Normal Section Flexural Capacity of Perforated Steel Box-concrete Composite Beams Before and After Concreting
Steel-encased composite members exhibit significant bearing capacity,however,slip failure between steel and concrete remains a critical concern.To effectively mitigate this issue and fully exploit the material strengths,this paper proposes a novel perforated steel box-concrete composite beam.Firstly,we investigate the bending performance of the box girder both before and after concreting,utilizing four-point bending tests on a total of four specimens.We subsequently analyze the effect of the shear span ratio on the bending capacity of the composite box girder.An ABAQUS model was developed for finite element analysis and validated against the experimental findings.The results indicate that both the bending capacity and deflection of the perforated steel box-concrete composite beam satisfy construction requirements.It was observed that a decrease in the shear span ratio leads to an increase in bending capacity.Upon reaching the ultimate load,no slippage was recorded at the interface;the bottom steel plate yielded,and all specimens failed due to bending.Load-deflection data displayed a two-stage response characterized by elastic and plastic behavior,demonstrating good ductility.Moreover,the ABAQUS finite element model correlated well with experimental data,offering valuable insights for the practical application of the specimens in engineering projects.
万方数据
维普
