Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train

A new testing method was introduced to apply moving-axle loads of a subway train on a track structure. In order to investigate the dynamic responses of the shield tunnel subjected to moving-axle loads, a series of laboratory model tests were conducted in a 1/40 scale model tunnel. The influences of...

Full description

Saved in:
Bibliographic Details
Main Authors: Mengxi Zhang, Xiaoqing Zhang, Lei Li, Chengyu Hong
Format: Article
Language:English
Published: Wiley 2018-10-01
Series:International Journal of Distributed Sensor Networks
Online Access:https://doi.org/10.1177/1550147718802785
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1832553280770670592
author Mengxi Zhang
Xiaoqing Zhang
Lei Li
Chengyu Hong
author_facet Mengxi Zhang
Xiaoqing Zhang
Lei Li
Chengyu Hong
author_sort Mengxi Zhang
collection DOAJ
description A new testing method was introduced to apply moving-axle loads of a subway train on a track structure. In order to investigate the dynamic responses of the shield tunnel subjected to moving-axle loads, a series of laboratory model tests were conducted in a 1/40 scale model tunnel. The influences of the axle load, the wheel speed, and the cover depth of the shield tunnel on the vertical displacement and acceleration of the lining were presented and discussed. Parametric studies revealed that the vertical displacement–time history of the lining presents a “W” shape due to the combined action of two axles of a bogie. The peak value of the vertical displacement increased with the axle load linearly, while it decreased with the increase in the cover depth. Moreover, response time of the displacement decreased with the increase in the wheel speed, but the peak values remained stable at the same level. Finally, a three-dimensional dynamic finite element model was adopted to simulate the movement of the axle loads and calculate the responses of the lining. The numerical results analysis agrees well with experimental results.
format Article
id doaj-art-a62adbab24a2495c8bb5c7e3d0827544
institution Kabale University
issn 1550-1477
language English
publishDate 2018-10-01
publisher Wiley
record_format Article
series International Journal of Distributed Sensor Networks
spelling doaj-art-a62adbab24a2495c8bb5c7e3d08275442025-02-03T05:54:31ZengWileyInternational Journal of Distributed Sensor Networks1550-14772018-10-011410.1177/1550147718802785Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway trainMengxi ZhangXiaoqing ZhangLei LiChengyu HongA new testing method was introduced to apply moving-axle loads of a subway train on a track structure. In order to investigate the dynamic responses of the shield tunnel subjected to moving-axle loads, a series of laboratory model tests were conducted in a 1/40 scale model tunnel. The influences of the axle load, the wheel speed, and the cover depth of the shield tunnel on the vertical displacement and acceleration of the lining were presented and discussed. Parametric studies revealed that the vertical displacement–time history of the lining presents a “W” shape due to the combined action of two axles of a bogie. The peak value of the vertical displacement increased with the axle load linearly, while it decreased with the increase in the cover depth. Moreover, response time of the displacement decreased with the increase in the wheel speed, but the peak values remained stable at the same level. Finally, a three-dimensional dynamic finite element model was adopted to simulate the movement of the axle loads and calculate the responses of the lining. The numerical results analysis agrees well with experimental results.https://doi.org/10.1177/1550147718802785
spellingShingle Mengxi Zhang
Xiaoqing Zhang
Lei Li
Chengyu Hong
Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train
International Journal of Distributed Sensor Networks
title Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train
title_full Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train
title_fullStr Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train
title_full_unstemmed Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train
title_short Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train
title_sort experimental study on dynamic response of model shield tunnel induced by moving axle loads of subway train
url https://doi.org/10.1177/1550147718802785
work_keys_str_mv AT mengxizhang experimentalstudyondynamicresponseofmodelshieldtunnelinducedbymovingaxleloadsofsubwaytrain
AT xiaoqingzhang experimentalstudyondynamicresponseofmodelshieldtunnelinducedbymovingaxleloadsofsubwaytrain
AT leili experimentalstudyondynamicresponseofmodelshieldtunnelinducedbymovingaxleloadsofsubwaytrain
AT chengyuhong experimentalstudyondynamicresponseofmodelshieldtunnelinducedbymovingaxleloadsofsubwaytrain