Shaking Table Test Of A Novel Railway High Pier Model

High-pier bridge is widely used in the high intensity seismic area in the west of China.The pier is easy to be damaged during the earthquake,and is not suitable to be repaired after the earthquake.This paper proposes a novel type of high pier structure,which can be replaced by the transverse connection,the earthquake damage as much as possible concentrated on the transverse connection,and the use of the transverse connection to dissipate seismic energy to protect the main components.The purpose of this method is that the pier and the transverse connection are in the elastic state to work together to resist the earthquake.During strong earthquakes,the major components are basically free from damage,while the secondary members can be repaired or replaced.In order to study the seismic behavior of the novel type of replaceable railway pier,a scale model pier is designed and made in this paper.Three seismic waves are selected as input excitation of the shaking table.Based on the OpenSEES platform,the novel railway high pier model shaking table test was simulated,and a numerical simulation method of the novel railway high pier structure was proposed.The specific work and research results are as follows:(1)The review summarizes the development history of high-pier earthquake resistance at home and abroad.Focused on the development of novel high-pier structures,and expounds the necessity of research on the novel forms of high pier structure.(2)Based on the concept that the major components are basically damaged after the earthquake,and the secondary members can be repaired or replaced,a model of a novel high pier is designed and produced.Study the seismic performance of novel railway high pier under the action of earthquake?The shaking table test was used to obtain the acceleration response,displacement response and strain variation of the secondary members.(3)The review summarizes the development history of high-pier earthquake resistance at home and abroad.Focused on the development of new high-pier structures,and expounds the necessity of research on the novel forms of high pier structure.The most unfavorable lateral coupling system and the position of the most unfavorable member in the lateral coupling system were obtained through the shaking table test research.(4)The model bridge piers have a good effect on the lateral connection system under the fortification earthquake,and the main and secondary components work together.Use the energy dissipation of the secondary members during strong earthquakes to reduce the vibration,and the major components are basically no damage after the earthquake.Realized the principle that the major components are basically damaged in the earthquake,and the damage of the secondary members can be repaired or replaced.The new type replaceable component bridge pier has good seismic performance.(5)Based on the OpenSees platform to simulate the shaking table test of the novel railway high pier model.The nonlinear beam column element based on the stiffness method is used to simulate the concrete pier column and the transverse connection system.It is found through analysis of comparative test results,the finite element numerical model can better simulate the shaking table test,the acceleration,displacement and strain values can be in good agreement with the test results.