Shear Lag Effect Research Of PC Cable-Stayed Bridge

Double-triangle side girder PC cable-stayed bridge is an ordinary type of bridge. Because the intervals of two side girders are relatively large in the beam-and-slab composite structure, the problem of shear lag effect can not be neglected. The thesis has studied it.1 .In this thesis, beam-and-slab decks cable-stayed bridge of Jinghua River is selected as an example, special finite element method and MIDAS software are used to build the whole large span PC cable-stayed bridge space model.2.A general potential energy equation is derived according to the principle of minimum potential energy and a set of differential equations with different boundary conditions are derived according to variational principle method considering the deformation properties and longitudinal displacement functions of∏-beam. The shear lag effect of∏-beam is studied as an example.3. Special finite element method and ANSYS software are used to build the partial model of cable-stayed bridge of Jinhua River. Base on this model, the shear lag effect is analyzed and the influence of cross slope is discussed.