Simplified Approximations for Critical Design Parameters of Rectangular Fiber-Reinforced Elastomeric Isolators
Publication: Journal of Engineering Mechanics
Volume 143, Issue 8
Abstract
Analytical solutions for critical design properties of elastomeric bearings, such as the compression modulus, bending modulus, and maximum shear strain due to compression or rotation, including the compressibility of the elastomer, have been developed for most basic laminated elastomeric bearing geometries. Due to the introduction of extensible fiber reinforcement, these analytical solutions have been expanded to include the extensibility of the reinforcement as an additional design parameter. Extensible reinforcement can have a pronounced effect on these design properties, comparable to the compressibility of the elastomer. These analytical solutions have previously been used to derive simplified approximations appropriate for use in design codes and standards. Thus far, a rectangular bearing geometry, which is in fact the most common in bridge bearing applications, has been largely omitted from these derivations. Simplified approximations for the compression modulus, maximum shear strain due to compression, and bending modulus of a rectangular laminated bearing with extensible reinforcement are proposed and evaluated against the analytical solution, including the effects of compressibility of the elastomer and extensibility of the reinforcement.
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Acknowledgments
Financial support for this study was provided by the McMaster University Centre for Effective Design of Structures (CEDS) funded through the Ontario Research and Development Challenge Fund (ORDCF) as well as an Early Researcher Award (ERA) grant, both of which are programs of the Ministry of Research and Innovation (MRI).
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©2017 American Society of Civil Engineers.
History
Received: Aug 24, 2016
Accepted: Dec 13, 2016
Published online: Mar 27, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 27, 2017
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