Abstract: This paper presents a simple way of calculation shear lag in prestressed concrete truss bridge deck which is subjected to horzontal axial forces, vertical force, and moments from diagonal web members and external loads. Governing differential equation for shear lag is obtained by variational approach under the combined action of horizontal force and vertical force, and the stress of considerating shear lag is obtained on linear condition by means of superposition principle. A calculation example is illustrated and compared with test result.

摘要： 本文提出预应力混凝土桁架桥面剪力滞计算的一种简单方法。预应力混凝土桁架桥面承受来自腹杆和外荷载的水平轴向力、竖直力、力矩的作用。用变分法推导各自在水平轴向力和竖直力作用下的微分方程。在线性条件下,应用叠加原理得到考虑剪力滞的应力。文中举一算例,并和试验结果比较。