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INVESTIGATING THE SEISMIC RESPONSE ANDISOLATION OF THE STRUCTURE UNDER THE EFFECT OFTHE DYNAMIC LOAD OF URBAN TRAIN MOVEMENT

Publish Year: 1403
Type: Conference paper
Language: English
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SEE09_082

Index date: 30 October 2024

INVESTIGATING THE SEISMIC RESPONSE ANDISOLATION OF THE STRUCTURE UNDER THE EFFECT OFTHE DYNAMIC LOAD OF URBAN TRAIN MOVEMENT abstract

This study takes the indoor substation adjacent to the elevated bridge subway line as theengineering background, investigates the structural vibration response law of the substation inducedby the operation of the subway line through on-site vibration measurement, and proposes a novelnonlinear gas-spring quasi-zero stiffness isolator is proposed to reduce the structural vertical vibrationand further reduce the safety distance. When the substation structure is less than 45 m from thesubway line, the structural response exceeds the safety limit (12.5 μm/s) of the VC-C standard. Withthe vibration isolator attached, the structural vibration response is significantly reduced, with the peakand root mean square response controlled by more than 70%. Particularly, the safe distance of thesubstation from the subway line is reduced from 45 m to 20 m. Moreover, the frequency domain resultanalysis indicates that the proposed nonlinear vibration isolator can effectively control the lowfrequencyvibration of the structure.

INVESTIGATING THE SEISMIC RESPONSE ANDISOLATION OF THE STRUCTURE UNDER THE EFFECT OFTHE DYNAMIC LOAD OF URBAN TRAIN MOVEMENT Keywords:

INVESTIGATING THE SEISMIC RESPONSE ANDISOLATION OF THE STRUCTURE UNDER THE EFFECT OFTHE DYNAMIC LOAD OF URBAN TRAIN MOVEMENT authors

Rasool Nodeh Farahani

Ph.D. in Civil Engineering, Noshirvani University of Technology, Babol, Iran

Alireza Mirza GolTabar

Associate Professor of Civil Engineering, Noshirvani University of Technology, Babol, Iran,

Amin Eslami

Bachelor of Civil Engineering, Zanjan branch, Islamic Azad University, Zanjan, Iran,

Mehrdad Ghodsi

M.Sc., Soil and Foundation Mechanics, Arak branch, Islamic Azad University, Arak, Iran,