The Simulation Calculation About The Skewed Continuous Beam Bridge And The Key Temporary Component Mechanical Property Analysis

The incremental launching method is widely Used in prestresse concrete continuous beam bridge with uniform section and cable stayed bridge construction.This thesis is based on the research object of bridge liuyanghe Yingpandonglu,and which is about to do some calculation and monitoring work of construction control for the key construction phase of incremental launching method and to research the dynamic emulate analysis method andthe key technology of the incremental launching method of the prestressconcrete continuous beam bridge.And found the way to determind the bestposition of the temporary pier.The highlight of the thesis are as followed:(1) Based on the process characteristics of finite element method,Establish finite element model, The key section stress theoretical values agree well with the measured data and the reliability of the model is verified. On the basis of this ,obtaian the Change rule Of internal forces,stress and buttress reaction in the incremental launching,At the same time, Optimize the slide set spacing support piers.Thus, the optimal temporary cable force control measures.And used in the incremental launching ,Satisfactory results have been obtained.(2)On the premise of the Cross-sectional form,reinforcement situation,Incremental Launching Construction remains the same, research the most important parameters of the girder bridge——the influence of slope in the incremental launching . Get the gradient in the process of incremental launching the influence degree of the girder and the influence . Exactly grasp the exact structure of the real structure stress. And take preventive measures in the construction of the response, Ensure the bridge construction to be able smoothly and securely .(3)Prefabricated platform is pushing in the construction of key temporary components, through the analysis of the key component of the precast platform of force performance, study the new and old beam section juncture place corner to cause a secondary girder structure internal force influence, analyzes the slide support the stress of the pier, and support piers of the slide decorate the optimal spacing.(4)Temporary pier in steel structure analyzing the force, ensure the rationality and set up temporary pier in pushing the safety in the process are analyzed, and temporary pier subsidence caused by internal force influence of main girder.