Dynamic Response of Railway Bridges, Part I: Development and Verification of a Numerical Model for Bridge-Train Dynamics

The objective of this study is to provide the engineering practice with a tool for simplified dynamic response assessment of high-speed railway bridges in the pre-design phase. To serve this purpose, a non-dimensional representation of the characteristic parameters of the train–bridge interaction problem is described and extended based on a beam bridge model subjected to the static axle loads of the crossing high-speed train. The non-dimensional parameter representation is used to discuss several code-related design issues. It is revealed that in an admitted parameter domain, a code-regulated static assessment of high-speed railway bridges may under-predict the actual dynamic response. Furthermore, the minimum mass of a bridge as a function of the characteristic parameters is presented to comply with the maximum bridge acceleration specified in standards.

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Simulation of the dynamic response of steel moment frames following sudden column loss. Experimental calibration of the numerical model and application

Steel Construction ◽

10.1002/stco.201810012 ◽

2018 ◽

Vol 11 (1) ◽

pp. 57-64 ◽

Cited By ~ 1

Author(s):

Ioan Marginean ◽

Florea Dinu ◽

Dan Dubina

Keyword(s):

Numerical Model ◽

Dynamic Response ◽

Moment Frames ◽

Steel Moment Frames ◽

Experimental Calibration

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Assessment of Corrosion Effects on Railway Bridges in the Middle Area of Vietnam Using Multibody Dynamics Approach

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.897.3 ◽

2020 ◽

Vol 897 ◽

pp. 3-11

Author(s):

My Pham ◽

Cong Thuat Dang ◽

Chinh Van Nguyen

Keyword(s):

Numerical Model ◽

Multibody Dynamics ◽

Dynamic Testing ◽

Load Capacity ◽

Moving Load ◽

Localized Corrosion ◽

Steel Bridge ◽

Actual Measurement ◽

Railway Bridges ◽

Bridge Model

A railway bridge over several decades will be degraded due to localized corrosion. As a result, the load capacity of the bridge decreases, especially under the live load caused by trains. This paper examines the residual load capacity of a bridge deteriorated by localized corrosion by using the multibody dynamics approach. This approach allows an accurate description of the interaction between trains and bridges. At the same time, it allows the formation of corrosion marks on each structural member of the bridge in a numerical model precisely based on actual measured data. In order to describe accurately the remaining load of the bridge under the moving load of the train, a dynamic testing and finite element modeling of a steel bridge are conducted and compared. At the same time, the results are also compared with the simulation results of the bridge model before being corroded. In addition, the paper also tests the reliability of the numerical model for assessments of similar bridges without actual measurement results that are costly and time-consuming.

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