The Construction Simulation And Seismic Response Analysis Of Continuous Rigid Frame Bridge

With the gradual improvement of bridge construction technology, continuous rigid frame bridge span is increasing,but in regard to how to control the construction safety and quality has been a thorny issue in the construction process.This requires that we must resort to large finite element software for bridges to simulate.we should identify control parameters of the construction process,so as to guide the construction.In addition,as a country with frequent seismic activity,in the previous earthquake, bridges have been severely affected,dynamic characteristic of the bridge structure is an important indicator of evaluating the carrying capacity of the bridge and operating performance,analysis of prestressed continuous rigid frame bridge are the precondition of analyzing the dynamic characteristics of the seismic response and seismic design.Through dynamic analysis of bridge structures, we can obtaine each frequencies and corresponding mode shapes of structure.in the end,understand the structural rigidity,distribution and the weak parts.In this paper, a continuous rigid frame bridge of Daguang wide high-speed Guangdong Section is treated as the background,Adopting a quite reasonable structural analysis theory,Conduct a simulation analysis of the construction phase of the bridge.at the same time we analyze the impact of different parameter variation in bridge constrution on the tress and deformation of the affected area in the bridge.Through comparative analysis, we can distinguish the sensitivity parameters and non-sensitive parameters in the construction control of the bridge.Finally, we should conduct analysis of the dynamic characteristics and seismic response on this bridge to provide a theoretical basis for the seismic analysis of continuous rigid frame bridge.This paper,inculd the following steps:(1)According to design documents and bridge seismic design knowledge from design institutes.Using MIDAS / CIVIL to establish the construction phasea static model and dynamic response model.of the bridge stage.(2)Using structural analysis software MIDAS/CIVIL to have a reasonable simulation on construction phase of the bridge.and study the parameter variation in construction process on the bridge construction phase control the impact on corresponding internal forces and displacements,the sensitivity analysis of the parameters to obtain construction and non-sensitive param and analyze to obtain construction and non-sensitive parameter sensitivity parameters.(3) Introducing several current common principles of the bridge seismic analysis methods.(4)A continuous rigid frame bridge of Daguang wide high-speed Guangdong Section is treated as the background,Introduces the theory of computing power, by calculating the frequency of each order of a bridge and the corresponding mode shapes, we can understand the dynamic characteristics of this bridge.(5)A continuous rigid frame bridge of Daguang wide high-speed Guangdong Section is treated as the background,focuses on the theoretical knowledge of seismic response.According to the condition of the ground,the bridge response spectrum analysis and time history analysis are carried out at the same time.Analysis comparatively the result of earthquake response of two methods.