The Influences of Earthquake on Elevated Trains

Abstract

This research mainly discusses the transmission characteristics of the bridge and behavior of trains when subjected to an earthquake First the type of Taiwan High Speed Rail’s bridge are established and then the modeling process and the reliability of the model are established through model verification After the model is verified the CSiBridge is used to wire Finite element analysis selected three types of pre-stressed concrete box girder bridge structures on the main line of the high-speed railway namely simply supported beams continuous beams with constant beam depth and continuous beams with variable beam depth The bridge parameters are mainly based on the publication of the Taiwan High Speed Rail Corporation Through the analysis of finite element method the seismic response duration of various parts of the bridge plate when the high-speed railway bridge is subjected to seismic force is obtained Through the Fourier transform to obtain the frequency spectrum and use the time and frequency spectrum to understand the transmission characteristics of the seismic force the analysis results show that the seismic force has a significant amplification effect on the lateral and vertical directions of the bridge In the part of the transfer function the transfer function is used to calculate the response spectrum of the midpoint of the bridge when another earthquake comes and the correctness of the transfer function is understood by comparing the calculation with the simulation Next a final discussion is made according to the modal frequency of the bridge the frequency of the bogie or train and the frequency of the Hunting Movement and the results show that in the simply supported beam bridge part the bogie may have vertical resonance which is a risk to safety Finally calculate the frequency of the Hunting Movement and pay attention to the possible resonance behavior in the lateral direction to ensure the safety of the train and avoid derailment

Date of Award	2020
Original language	English
Supervisor	Chen-Ming Kuo (Supervisor)