新型钢桥面铺装结构的力学性能分析

针对目前正交异性钢桥面铺装层常见的裂缝、推移、局部拥包等破坏形式,应用有限元法对新型桥面铺装结构,分析不同位置的荷载对铺装层最大拉应力和表面最大竖向位移、最大剪应力的影响,并与传统的沥青混凝土铺装结构进行对比分析。分析结果表明：采用新型的铺装结构比沥青混凝土铺装结构的最大拉应力、表面最大竖向位移、铺装层表面和底面的最大剪应力都有一定程度的降低,因此能较好的控制钢桥面铺装层的破坏。在采用新型桥面铺装结构时应以铺装层横向最大拉应力、最大横向剪应力作为铺装层开裂破坏控制指标。研究结果可以为大跨径钢箱梁桥面铺装设计提供理论参考.

A New Comparative Stress Analysis of Orthotropic Steel Bridge Panels Pavement Structure

The mechanical response of pavement layers on the orthotropic steel deck under wheel loading is analyzed by finite element method.Because of the special characteristics of the orthotropic deck of steel bridge and characteristics of the asphalt mixture,fatigue failure,rut and swell are always found on the pavement,the different load on the location of the pavement layer and the maximum tensile stress surface maximum vertical displacement,the impact of maximum shear stress are analyzed.The results show that using the new materials reduce maximum tensile stress,the largest vertical surface displacement,pavement surface and bottom layers of the maximum shear stress reduced.Vertical maximum tensile stress and the largest vertical shear stress should be as cracking pavement layer damage control indicators.The results for the long-span steel box girder bridge pavement design theory reference.