Disease Analysis for “Single Plate Bearing” in Plate Girder Bridge and Its Strengthening Scheme

Abstract

Abstract The phenomenon of “single plate bearing” is one of the diseases in plate girder bridges. In order to study its mechanical characteristics and strengthening schemes, with the help of finite element software ANSYS, “single plate bearing” of plate girder bridge is simulated numerically in this section. Firstly, models are simulated with beam element, and transversal distribution rule of load is analysed. Then according to the mechanical behavior of plate girder bridge and the reason leading to “single plate bearing”, five strengthening schemes are proposed to delay or avoid “single plate bearing” and their spatial models are built with solid element Mechanical behaviors such as displacement, stress are contrasted and analysed. Furthermore, transversal stress at hinged joints is analysed in detail, and it is proposed that the adhesive strength between new and old concrete should be applied to test transversal stress at hinged joints. At last according to the merit and demerit of five strengthening schemes, feasible schemes for “single plate bearing” are given.