考虑铺装层的空心板桥荷载横向分布系数计算

Calculation of Horizontal Load Distribution of Hollow Slab Bridge with Pavement

传统铰接板法计算空心板桥的横向分布并未考虑铺装层对整体刚度的贡献作用,尤其针对大铺装层或采用整体化铺装加固的桥梁工程,该方法过于保守。为精确计算,节约设计成本,考虑桥面铺装层对于空心板桥横向分布的影响,通过理论分析推导考虑整体化铺装的横向分布计算方法,结合有限元分析和实桥荷载试验反算横向分布结果,验证了理论的正确性。结果表明,铺装层提高了桥梁截面刚度,考虑铺装的修正铰接板法更加契合空心板桥实际受力状况,并有效提高了各板承载能力的均匀性,有效避免单板受力的情况。

The traditional hinged plate method calculates the lateral distribution of the hollow slab bridge without considering the contribution of the pavement layer to the overall stiffness,especially for large pavement layers or bridge projects with integrated pavement reinforcement,therefore,it is often considered to be too conservative.In order to calculate accurately and save design costs,the article considered the influence of the bridge deck pavement on the horizontal distribution of the hollow slab bridge,and derived the calculation method of the horizontal distribution considering the integrated pavement through theoretical analysis,and combined the finite element analysis and the inverse calculation of the actual bridge load test.The horizontal distribution results verify the correctness of the theory.The results show that the pavement layer improves the rigidity of the bridge section,and the modified hinged plate method considering the paving is more suitable for the actual force condition of the hollow slab bridge,and effectively improves the uniformity of the load-bearing capacity of each slab,and effectively avoids the force of the veneer.