Resumen de Parameter and sensitivity reliability analysis of curved composite box beam
Pengzhen Lu, Yijie Zhang, Jiahao Wang, Ying-Hui Wu, Dongguo Li, Tian Jin
Aiming at the reliability problem of curved steel-concrete composite box girder, this article adopts the research methods of numerical simulation and model test. A load–slip constitutive relationship suitable for simulating composite box girder shear connectors is proposed, which is introduced into ANSYS finite element program and a three-dimensional finite element analysis model is established. At the same time, a model test is established for verification. The comparison between the results of numerical simulation and model experiment verifies the correctness and applicability of the finite element analysis model. According to the mechanical characteristics of the curved steel-concrete composite box girder, the influence of different design parameters on the load-bearing capacity of the curved composite box girder bridge is studied. Based on the sensitivity index, the influence degree of the design parameters on the structural reliability of the curved composite box girder is judged. The influence of the sensitivity of the design parameters of the curved steel-concrete composite box girder bridge on the flexural reliability of the structure is discussed. The optimal measures to improve the flexural bearing capacity of curved steel-concrete composite beam bridges are proposed. It is expected to provide new ideas and analysis methods for the optimization design and reliability analysis of curved composite box girder.
