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Extended modified bridge system (EMBS) method for decoupling seismic vehicle-bridge interaction

Homaei, H ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1002/eqe.4209
  3. Publisher: 2024
  4. Abstract:
  5. Seismic vehicle-bridge interaction (SVBI) is the study of vehicle-bridge interaction (VBI) in the presence of earthquake excitation. SVBI is an interdisciplinary problem of increasing importance to the design and safety of railways. This study deploys a consistent methodology to decouple the vehicle-bridge system and solve independently the bridge and vehicle subsystems, bypassing multiple challenges the seismic response analysis of a coupled vehicle-bridge system entails. The proposed approach builds upon the previously established Extended Modified Bridge System (EMBS) method for decoupling vehicle-bridge systems (in the absence of earthquake excitation). Its premise is to first characterize and then assess the relative importance of the VBI effect on the bridge and vehicle responses and replicate it by modifying the pertinent uncoupled equations of motion (EOMs). The formulation deployed accommodates multi-degree of freedom models for both the vehicle and bridge and can thus tackle complex systems. The analysis examines the ability of the proposed decoupling approach to predict the response of a realistic system vehicle-bridge system under a suit of historical earthquake records. The decoupled results are in excellent agreement with the coupled solutions for all earthquake records and scenarios (i.e., earthquake excitation solely in the transverse direction of the bridge, as well as in both the transverse and vertical directions simultaneously). © 2024 The Author(s). Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd
  6. Keywords:
  7. Degrees of freedom (mechanics) ; Earthquakes ; Equations of motion ; Ultrasonic devices ; Bridge systems ; Decoupled approach ; Decouplings ; Earthquake excitation ; Extended modified bridge system method ; Seismic analysis ; Seismic vehicle-bridge interaction ; System methods ; Vehicle-bridge interaction ; Vehicle-bridge system ; Bridge ; Earthquake engineering ; Modeling ; Seismic response ; Vehicles
  8. Source: Earthquake Engineering and Structural Dynamics ; Volume 53, Issue 13 , 2024 , Pages 4054-4075 ; 00988847 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/full/10.1002/eqe.4209