Study On Dissymmetry Span Of Rigid Frame And Continuous Girder Bridge

Dissymmetry span of rigid frame and continuous girder bridge is a complex spatial stress system, and structural loads are applied in stages. With each construction stage possibly occurred shrinkage and creep, the boundary constraints increasing or decreasing, prestress tendons tensioning and system conversion etc, the structure geometric linear and stress states also in change. The final structure will experience the formation of a complex system of transformation process, But construction has been completed on the limited structural adjustment measures. Therefore, it is particularly important to carry out the structural analysis of the high-pier and long-span continuous rigid frame bridge at design phase. Some work and achievements in this article are followed:Based on the Yongshun Bridge in Hunan province, Application of ANSYS finite element model to establish space segment No.0 stress analysis of space, on the segment No.0 roof, floor, web and diaphragm into a bridge during the construction phase and operational phase of the stress were compared to master segment No.0 stress distribution for the bridge construction and design basis, for the same type of bridge segment No.0 design is also an important reference value.Use software BRanalysis established asymmetric dissymmetry span of rigid frame and continuous girder bridge structure construction control Cantilever Simulation model of Yongshun bridge pier No. 3 proposed three different weight options, comparative analysis of the different asymmetric construction process The weight program on piers and the main beam of the stress and linear to arrive at the bridge cantilever construction method with the optimal weight and weight cantileverconstruction of asymmetric some basic rules.This thesis analyzed the alignment and mechanical behavior during its construction and service stages of Yongshun Bridge under permanent action, variable action and combination for action effects. Meet the specifications request, the main beam of the economic analysis, the main beam of different grades of concrete, rigid frame for the future to optimize the design reference.