Aseismic Influence Analysis Of Assembled Bridge Pier On Aseismic Bearing

Traffic infrastructure construction is the key element of national economic development.It is very important to strengthen the research of bridge engineering technology for economic construction.With the development of prefabricated building,its technology has been applied in bridge engineering,especially in the prefabrication and assembly of bridge superstructure,the technology has been quite mature.However,the application of the assembled bridge pier is limited by many factors,especially in the area of high earthquake,because the structural rigidity of the assembled bridge pier is not as good as the integral bridge pier,and there is a great uncertainty in the earthquake,so it is of great significance to study the mechanical performance of the assembled bridge pier under the earthquake action,so that the assembled bridge pier can be more widely used.In this paper,the pseudo-static analysis method is used to analyze the stress of the test piers with different connection forms,and then the dynamic time history analysis method is used to study the seismic response of the solid piers to provide reference for the seismic resistance of the piers.The main research contents of this paper are as follows:?1?Based on the literature review,this paper analyzes the shortcomings and research value of the current assembled piers,and summarizes the research status of the assembled piers at home and abroad.?2?This paper summarizes the connection technology of the assembled pier,analyzes the advantages of various technologies,explains the seismic analysis methods of the assembled pier,provides the theoretical basis for the research of the assembled pier,compares the establishment methods of the finite element model of the assembled pier,and provides a strong guarantee for the accurate analysis of the pier.?3?Using the finite element software ABAQUS,three kinds of test pier models are established,which are integral pier,steel sleeve connected pier and corrugated pipe connected pier.Through the quasi-static analysis method,the finite element simulation of the three kinds of piers is carried out,and the hysteresis curve and the maximum limit load of the numerical simulation results are extracted and compared with the reference^[29],so as to verify the establishment of the model Is correct.On this basis,by changing the length of steel sleeve connection and increasing the shear key,the output results are analyzed,and the impact of the two factors on the seismic performance of assembled piers is summarized.?4?Taking the solid pier as an example,the finite element models of three different types of connected assembled and integral piers are established respectively.The dynamic time history analysis method is used to simulate the difference of seismic performance between assembled and integral piers under the same plate rubber bearing,and to explore the influence of different connection forms of assembled piers on the overall seismic performance of piers.?5?On the basis of the above analysis,the vibration reduction and isolation bearings are introduced to compare the displacement of the top of the assembled piers with different connection forms under the plate rubber bearings and lead rubber bearings,and to explore the vibration reduction effect of the vibration reduction and isolation bearings.