【摘要】 为提高寒区钢桥面铺装的使用性能与寿命，必须考虑桥面铺装层不同厚度对结构承载能力、耐久性及成本的影响。依托呼和浩特市昭乌达路高架桥金桥路段，结合寒区大温差气候条件，建立钢箱梁桥整体模型进行受力分析。基于局部梁端有限元模型，探究钢桥面铺装结构的温度场分布规律；同时对比了“GA+SMA”钢桥面铺装层在不同厚度组合情况下的结构温度、力学响应和永久变形。低温环境下改变铺装层厚度对结构表面温度分布有一定影响，而高温环境下改变铺装层厚度对表面温度几乎没有影响。低温环境下，增加上面层厚度可以有效减小铺装结构的表面拉应力和层间剪应力，而下面层厚度的变化对这些应力的影响较小。高温环境下，增加上面层厚度可以有效减小铺装结构的永久变形，而下面层厚度的变化对永久变形的影响较小。综合考虑厚度变化对铺装结构温度、力学响应和永久变形的影响，“3cm铺装下层+4cm铺装上层”作为推荐的铺装结构厚度组合。更多还原

【Abstract】 In order to improve the performance and service life of steel bridge deck pavement for high speed road in cold area, the influence of different thickness of bridge deck pavement layer on structural bearing capacity, durability and construction cost should be considered. Based on the finite element model of local girder segments, this paper investigated the temperature field distribution law of rigid deck pavement structure. At the same time, the structural temperature, mechanical response and permanent deformation of GA+SMA steel bridge deck pavement layer under different thickness combinations were compared. The analysis results showed that the thickness of the paving layer under low temperature environment had certain influence on the surface temperature distribution of the structure, while the thickness of the paving layer under high temperature environment had little effect on the surface temperature. Under low-temperature environment, increasing the thickness of the upper layer could effectively reduce the surface tensile stress and inter layer shear stress of the paving structure, while the change of the thickness of the lower layer has less effect on these stresses. Under high-temperature environment, increasing the thickness of the upper layer can effectively reduce the permanent deformation of the paving structure, while the change of the thickness of the lower layer has less effect on the permanent deformation. Considering the influence of thickness change on temperature, mechanical response and permanent deformation of paving structure, 3cm paving lower layer + 4cm paving upper layer is recommended as the thickness combination of paving structure.更多还原