混凝土桥水泥铺装层温度应力研究

针对典型T梁和箱形梁桥,在简支和多跨连续边界条件、承受正温度梯度、负温度梯度、温度和汽车耦合作用下,用有限元法分析水泥铺装层的受力特征和铺装层拉应力、层内最大剪应力、等效应力和接触层间法向拉拔力、层间剪应力,以及各应力对铺装厚度的敏感性.以箱形梁桥为对象,比较分析了连续水泥铺装和划缝、带裂缝工作状态下受力以及配钢筋的影响.提出了设计、施工建议.

Thermally Induced Stresses in Concrete Pavement on Concrete Bridge

A comprehensive FEM computation was conducted to investigate the behavior of concrete pavement on concrete bridges with typical T beam or box beam. Conditions considered in the computation were simple or continuous supports, positive or negative temperature gradients, and temperature and, vehicle load coupled effects. Resulting tensile stress, maximum shear stress and equivalent stress in pavement, and normal pulling stress and shear stress in interface, as well as sensitivities of the stresses to pavement depth were ana lyzed. For the box beam bridge, stress responses between continuous pavement and jointed pavement with or without reinforcement were compared. Based on the analysis and comparison, suggestions were provided for the design and construction of concrete pavement on concrete bridges.