|Table of Contents|

Train-induced Vibration Test of Metro Depot Over-track Buildings(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年03期
Page:
99-107
Research Field:
Publishing date:

Info

Title:
Train-induced Vibration Test of Metro Depot Over-track Buildings
Author(s):
XIE Wei-ping;  YUAN Kui;  SUN Liang-ming
(School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China)
Keywords:
metro depot over-track building;  modal identification;  train-induced vibration;  time-frequency characteristic;  vibration acceleration
PACS:
TU311.3
DOI:
10.19815/j.jace.2019.04038
Abstract:
In order to study the vibration mechanics of metro depot over-track buildings caused by the train,the vibration test of the metro depot over-track building on the test line in Hangzhou was carried out. Based on the environmental excitation, the dynamic characteristics of the superstructure floor were analyzed, and the vibration characteristics and propagation laws of the subway superstructure floor at different train speeds were studied. The vibration comfort degree of building interior was evaluated according to the Chinese environmental vibration evaluation standard. The results show that the first-order frequency of the floor of the over-track building is between 28-46 Hz, and the damping ratio is 0.3%-1%. The train-induced vibration of the over-track building is mainly distributed between 0-140 Hz, and the low frequency vibration within 10-25 Hz is the overall vibration of the structure, and there is a trend of amplification along the floor height. The distribution of floor vibration frequency is similar under different train speeds which is mainly concentrated near the floor vibration frequency. With the decrease of train loading speed, the overall vibration intensity of over-track building decreases, and the maximum Z vibration level and the frequency division vibration of some floors are rebounding. When the train on the test line runs at a speed of more than 35 km·h-1, the measured maximum Z vibration level of the floor in over-track building exceeds the standard limit value, so as to ensure the test function of the test line and improve the vibration comfort of the over-track building. It is necessary to take further vibration reduction and isolation measure for the metro depot over-track building on the basis of the existing track vibration reduction.

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Last Update: 2020-06-08