先张法预应力道路板的受力性能

Mechanical Behavior of Prestressed Road Slab by Pretensioning Method

以湖州某构件厂施工现场临时道路为工程背景,基于ABAQUS软件有限元数值模拟方法,分别研究了先张法预应力道路板在预应力施加及车载作用下的受力性能,包括板的应力及位移变化规律。研究结果表明:预应力道路板在施加预应力后,沿板纵向从板中部至板边应力及位移均逐渐减小;道路板板顶应力从车载作用位置至板边的变化规律是沿板纵向先减小后增大,横向为应力逐渐减小;道路板位移沿板纵向从板横边至交界处逐渐增大,沿横向从车载作用位置至两边位移逐渐减小。

Taking the temporary road at the construction site of a component factory in Huzhou as the engineering background,based on the finite element numerical simulation method of ABAQUS software,the mechanical properties of prestressed road slab by pretensioning method under the actions of the prestressing force applied and the vehicle-mounted load are studied respectively,including the variation law of stress and displacement of the slab.The results show that:the stress and displacement of prestressed road slab decrease gradually from the middle to the edge along the longitudinal direction of the slab after the prestress is applied;the variation law of the stress at the top of the road slab from the action position of the vehicle to the edge of the slab is that it decreases first and then increases along the longitudinal direction of the slab,and the stress decreases gradually in the transverse direction;the displacement of the road slab increases gradually from the transverse edge of the slab to the junction along the longitudinal direction of the slab,and decreases gradually from the vehicle action position to both sides along the transverse direction.