环氧沥青混凝土桥面铺装力学接触分析

Load Contact Analysis of Epoxy Asphalt Concrete Bridge Deck Pavement

环氧沥青混凝土作为桥面铺装材料,因其强度高,刚度大,高温稳定性等特点,在桥梁铺装中得到广泛应用。但是,对纵坡状态下的环氧沥青混凝土桥面铺装的研究较少,选取5%纵坡的桥面二维结构,建立桥面铺装与车轮荷载的接触体系,对纵坡状态下,环氧沥青混凝土桥面铺装进行有限元分析,对比平坡状态下的接触状况。结果表明:在平坡状态下,环氧沥青混凝土桥面铺装,最大应力为14.69 MPa,最小应力为0 MPa.应力最大处为接触点处,最小处在接触点最远处。由此可知,在平坡状态下,环氧沥青桥面铺装结构,最不利状态即为接触点,距离越远,影响越小。在5%的纵坡状态下,环氧沥青混凝土桥面铺装,最大应力为14.98 MPa,最小应力为0 MPa.应力最大处为接触点后两个网格点处,最小处在接触点最远处。由此可知,在5%的纵坡状态下,环氧沥青混凝土,最不利状态在接触点后,距离越远,影响越小。

Epoxy asphalt concrete,as a bridge deck pavement material,has been widely used in bridge pavement due to its high strength,high stiffness and high temperature stability.However,there is little research on epoxy asphalt concrete bridge deck pavement under longitudinal slope.In this paper,the two-dimensional structure of bridge deck pavement with 5%longitudinal slope is selected,the contact system between bridge deck pavement and wheel load is established,the finite element analysis of epoxy asphalt concrete bridge deck pavement under longitudinal slope state is carried out,and the contact condition under flat slope state is compared.The results show that under the condition of flat slope,the maximum stress and minimum stress of epoxy asphalt concrete bridge deck pavement are 14.69 MPa and 0 MPa.The maximum stress is at the contact point,and the minimum is at the farthest point of the contact point.It can be seen that under the condition of flat slope,the most unfavorable state of epoxy asphalt bridge deck pavement structure is the contact point,the farther the distance,the less the influence.Under the 5%longitudinal slope condition,the epoxy asphalt concrete bridge deck is paved with a maximum stress of 14.98 MPa and a minimum stress of 0 MPa.The maximum stress is at the two grid points after the contact point,and the minimum is at the farthest point of the contact point.Therefore,under the 5%vertical slope,the most unfavorable condition of epoxy asphalt concrete is after the contact point.The farther away the distance,the smaller the impact.