RETRACTED: Local Stress and Nonlinear Mechanical Behaviors of the V-Shape Pier-Girder Joint Based on Model Test

Abstract

The structural mechanism existing in the V-shape pier-girder joint in long-span V-shape rigid frame composite arch bridge is complicated, especially for the case in the Xiaolan Channel long-span major bridge project, which requires comprehensive research on the local stress and nonlinear behavior after cracking through model test. Using nonlinear space finite element model, the local stress and post cracking nonlinear mechanical behaviors at the V-shape pier-girder joint are studied. In this paper, the design principles, loading modes, procedures and arrangement of gauging points applied in the model are introduced at first. Comparing the experimental results with the theoretical values, the local stress distributions of the V-shape pier-girder joint under different loading conditions are obtained. Furthermore, the nonlinear behavior of the V-shape pier-girder joint is investigated by analyzing the relationships between loads and reinforcement strains in negative moment area and the relationships between loads and deflections. The study shows that the load transfer in V-shape pier girder joint is reasonable. The joint has good ductibility, post-deformation and residual carrying capacity. The design of the V-shape rigid frame composite arch bridge meets the criteria. It is also expected that the results presented in this paper would be useful as references for future research and design of V-shape rigid frame composite arch bridges and joints.