Elastic Analysis of Steel Beams Strengthened with GFRP Plates Including Preexisting Loading Effects
Publication: Journal of Structural Engineering
Volume 143, Issue 12
Abstract
The present study develops a theory for the elastic analysis of a preloaded wide flange steel beam, strengthened with two glass fiber-reinforced polymer (GFRP) plates bonded to both flanges, then subjected to additional loads. Starting with the principle of stationary potential energy, the governing equilibrium equations and corresponding boundary conditions are formulated prior to and after GFRP strengthening. The resulting theory involves four coupled equilibrium equations and 10 boundary conditions. A general closed form solution is then provided for general loading and boundary conditions. Detailed comparisons with three-dimensional finite-element solutions show that the theory provides reliable predictions for the displacements and stresses. A parametric study is then developed to quantify the effects of strengthening, GFRP plate thicknesses, and preexisting loads on the capacity of the strengthened beam.
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Acknowledgments
The authors gratefully acknowledge scholarship support from the University of Ottawa to the first author and research funding from the Natural Sciences and Engineering Research Council (NSERC) of Canada to the second and third authors.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 143 • Issue 12 • December 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 20, 2016
Accepted: Jun 2, 2017
Published online: Sep 25, 2017
Published in print: Dec 1, 2017
Discussion open until: Feb 25, 2018
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