一种新型无缝桥面伸缩缝结构的数值模型分析

The numerical model analysis of a new type seamless bridge expansion joint structure

以弹塑体伸缩缝在中小跨径简支梁桥伸缩结构的使用和研究为基础,新提出将弹塑体伸缩缝设置于高速公路桥梁的混凝土现浇结构层,并将桥面沥青混凝土贯通铺筑形成无缝桥面结构。利用相关复合材料模量估算的方法对弹塑体伸缩缝进行参数预估,结合Burgers本构模型对无缝桥面整体结构建立数值模型,分析了结构的拉伸变形能力及车辙性能,结果表明,无缝桥面结构具有比较良好的车辙性能并能满足1.5cm及以下的拉伸变形。

With elastic-plastic body expansion joint in small and medium span simply supported girder bridge expansion structure of the use and research as a foundation, this paper puts forward the elastic-plastic body expansion joint setting in highway bridge concrete cast- in-place structure layer, and the bridge deck asphalt concrete paving through formation of seamless bridge deck structure. Using relevant composite modulus method to estimate the elasticzplastic body expansion joint estimate parameters, combined with the burgers constitutive model for seamless floor integral structure to establish numerical model, this paper analyzes the structure of the tensile deformation ability and rutting performance, and the results show that：seamless floor structure has the quite good rutting performance and can meet the 1.5 em and the tensile deformation.