|Table of Contents|

Research on vertical two-level dynamic response of vehicle-induced vibration in subway superstructure(PDF)

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

Issue:
2024年04期
Page:
73-82
Research Field:
建筑结构
Publishing date:

Info

Title:
Research on vertical two-level dynamic response of vehicle-induced vibration in subway superstructure
Author(s):
MA Qianying;  WU Zonghuan;  LI Shuai;  GAO Xiaomin
(School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)
Keywords:
superstructure;  vertical vibration;  spectrum analysis;  two-level dynamic model
PACS:
TU17
DOI:
10.19815/j.jace.2022.06034
Abstract:
In order to effectively evaluate the influence of vibration pollution of superstructure caused by subway operation on the comfort of structure, the vibration response law of the superstructure under vehicle-induced vibration was analyzed. A two-level vertical vibration response dynamic model of the superstructure was constructed by a separated modeling method. The response law of the superstructure was analyzed as a whole by the concentrated mass method. A floor vibration response theory was established based on the Euler-Bernoulli beam. Based on the established two-level vibration theory model, a structural vibration(seismic)signal analysis system was developed using the MATLAB Appdesigner toolbox. The results show that as the number of floors increases, the vibration response shows an upward trend, and the amplitude tends to stabilize as the number of floors increases. As the natural vibration period of the structure prolongs, the dynamic response will shift from the high frequency range to the mid low frequency range. The vibration response inside the plate does not simply occur near the fundamental frequency, but should be comprehensively considered based on the dynamic characteristics of the load and the characteristics of the structure itself. The displacement response reflects the effect of the load in the full frequency range, while the acceleration response further reflects the effect of the load in the excellent frequency range.

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Last Update: 2024-07-20