A Modified Bridge System method to characterize and decouple vehicle–bridge interaction

Stoura, Charikleia D.; Dimitrakopoulos, Elias G.

doi:10.1007/s00707-020-02699-3

Cited by 20 publications

(33 citation statements)

References 43 publications

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“…The present study extends the previous work of the authors [21,26], to the case of multi-degree of freedom (MDOF) vehicle-MDOF bridge systems, representative of practical (conventional and high speed) trainbridge systems. The study decouples the VBI dynamics, in the vertical plane, through an asymptotic expansion analysis of the response of the coupled system [28], and proposes decoupling formulations applicable to any bridge type.…”

Section: Introductionsupporting

confidence: 65%

“…Subsequent studies [19,20] confirmed these findings [8,18] numerically through parametric analyses for various vehicle and bridge systems. A recent study by the authors [21] stressed the importance of the impedance ratio, defined as the ratio of the vehicle's damping and bridge's mechanical impedance, as a dominant coupling parameter.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, Eurocode suggests an amplification factor ϕ to estimate the increase in the vibration of a bridge due to the irregularities in the rails [14]. However, in many cases, ϕ underestimates the effect of rail irregularities on the bridge response, and especially acceleration [21,27].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the authors [21] proposed an approach to characterize and decouple the VBI problem for simply supported bridges-the Modified Bridge System (MBS) method. This method captures both additional damping and effect of irregularities, as well as, the additional stiffness effect of VBI on the response of the supporting bridge.…”

Section: Introductionmentioning

confidence: 99%

“…The study decouples the VBI dynamics, in the vertical plane, through an asymptotic expansion analysis of the response of the coupled system [28], and proposes decoupling formulations applicable to any bridge type. Different to the formerly presented MBS method [21], the consideration of MDOF vehicle and MDOF bridge models also enables the accurate prediction of the bridge deck acceleration.…”

Section: Introductionmentioning

confidence: 99%

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MDOF extension of the Modified Bridge System method for vehicle–bridge interaction

Stoura

Dimitrakopoulos

2020

Nonlinear Dyn

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This study examines the effect of vehicle–bridge interaction (VBI) on the vibration of coupled train–bridge systems and proposes a consistent approach to decouple the VBI problem; the Extended Modified Bridge System (EMBS) method. This constitutes an extension of the formerly developed, for simply supported bridges, Modified Bridge System method. The analysis considers a generic, multi-degree of freedom (MDOF) vehicle–MDOF bridge configuration, representative of a wide class of practical train–bridge systems. This approach enables the MDOF representation of the constituent VBI mechanisms on the mechanical system of the bridge. Based on an asymptotic expansion analysis of the coupled system response, the study brings forward the dominant coupling parameters and their relative importance on the bridge response. The proposed decoupling EMBS method solves the bridge independently of the vehicle by changing its mechanical system via additional damping, stiffness and loading terms. The MDOF description of these terms makes the proposed scheme appropriate for involved bridge configurations, such as continuous and arch bridges. In addition, it allows the accurate estimation of the deck acceleration of bridges, which is an important serviceability limit state. Numerical examples demonstrate the accuracy and efficiency of the EMBS method compared with the solution of the fully coupled system and other decoupling methodologies. Lastly, the proposed approach is simpler than the coupled analysis, which can be of particular importance in bridge design practice.

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Section: Introductionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MDOF extension of the Modified Bridge System method for vehicle–bridge interaction

Stoura

Dimitrakopoulos

2020

Nonlinear Dyn

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Does vehicle‐bridge interaction resemble the effect of tuned‐mass dampers on bridges during earthquakes?

Homaei,

Dimitrakopoulos

2023

ce papers

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In many seismic studies, the coupled vehicle‐bridge system is treated as a tuned‐mass damper (TMD)‐bridge system, and unsurprisingly, the vehicle usually reduces the seismic bridge response. The current study challenges this common belief. To this end, it investigates the influence of running vehicles on the seismic performance of bridges. Specifically, it compares the effect of vehicle‐bridge interaction (VBI) to that of a TMD on bridges subjected to earthquakes. The discussion explores the underlying physical mechanisms of VBI and TMD, and highlights the superficial similarities and the substantial differences between them. In this context, the study presents pertinent numerical simulations for a set of natural earthquake records.

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Extended Modified Bridge System (EMBS) method for decoupling seismic vehicle‐bridge interaction

Homaei,

Stoura,

Dimitrakopoulos

2024

Earthq Engng Struct Dyn

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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).

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A Modified Bridge System method to characterize and decouple vehicle–bridge interaction

Cited by 20 publications

References 43 publications

MDOF extension of the Modified Bridge System method for vehicle–bridge interaction

MDOF extension of the Modified Bridge System method for vehicle–bridge interaction

Does vehicle‐bridge interaction resemble the effect of tuned‐mass dampers on bridges during earthquakes?

Extended Modified Bridge System (EMBS) method for decoupling seismic vehicle‐bridge interaction

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