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。 This paper presents a simple method for calculating the shear lag of prestressed concrete truss deck. The prestressed concrete truss bridge deck is subjected to horizontal axial force, vertical force and moment from the web and external load. Derivate the differential equation under the action of horizontal axial force and vertical force by variational method. Under linear conditions, the stress considering shear lag is obtained by applying the superposition principle. In this paper, an example is given and compared with the test results.