Structural Analysis of Bridges with Time-Variant Modulus of Elasticity under Moving Loads

Title: Structural Analysis of Bridges with Time-Variant Modulus of Elasticity under Moving Loads
Authors: Aied, Hussein
González, Arturo
Permanent link: http://hdl.handle.net/10197/6436
Date: 2012
Abstract: A simply supported bridge model is used to investigate the effect of a strain rate dependent modulus of elasticity on the dynamic response of the structure to a moving load. The bridge is modelled as a one-dimensional discretized finite element beam and the moving load is represented by a point force. A constant modulus of elasticity is traditionally employed when simulating the dynamic response of structures under moving loads. In this paper, a time-variant modulus is used to calculate strains and displacements and compare them to the traditional approach for different speeds and bridge spans. The time-variant modulus is obtained from the strain rate of the structure which is used in turn to update the strain at each point in time. The results show significant changes in the modulus and in the resulting load effect as load magnitude and speed increase.  
Type of material: Conference Publication
Publisher: Taylor and Francis
Copyright (published version): 2012 Taylor and Francis
Keywords: Bridge stiffness;CEB-FIP model code;Moving point force model
DOI: 10.1201/b12352-407
Language: en
Status of Item: Peer reviewed
Is part of: Biondini, F. and Frangopol, D.M. (eds). Bridge Maintaintenance, Safety, Management, Resilience and Sustainability
Conference Details: 6th International Conference on Bridge Maintenance, Safety and Management (IABMAS), Villa Erba, Lake Como, Italy, 8-12 July, 2012
Appears in Collections:Civil Engineering Research Collection

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