基于桥面铺装材料与复合结构的力学响应研究

Research on Mechanical Response of Bridge Deck Pavement Materials and Composite Structures

基于现场实测数据,并采用有限元软件,对桥面铺装材料及铺装结构进行建模与力学响应分析。结果表明,基于实测数据建立的桥面铺装材料的永久变形预估模型具有良好的适用性与有效性,其模型系数达0.907。铺装材料的模量经反演计算,其误差仅为3.71%。沥青层内最大拉应力、沥青层与混凝土铺装层间剪应力的临界荷位是小箱梁跨中的中心(A1);上下面层拉应变的临界荷位均为小箱梁支座处腹板上方(B3);沥青层最大剪应力的临界荷位是小箱梁跨中腹板上方(A3)。

In this paper,based on on-site measured data,the model and mechanical response analysis of the bridge deck pavement(BDP)materials and BDP composite structures are built by finite element software.The results showed that the permanent deformation prediction model of BDP materials based on measured data had better effectiveness and applicability,and the fitting coefficient was as high as 0.907.The modulus inverse calculation of BDP materials had the deviation of only 3.71%.The maximum tensile stress in asphalt layer and the critical load of shear stress between asphalt layer and concrete pavement layer are the center of the span of small box girder(A1).The critical load positions of tensile strain in the upper and lower layers were above the support of small box-girder rib plate(B3).The critical load position of the maximum shear stress for the asphalt layer was above the mid-span of box-girder rib plate(A3).