Mechanics of an Adhesive Anchor System Subjected to a Pullout Load. II: Viscoelastic Analysis
Publication: Journal of Structural Engineering
Volume 140, Issue 2
Abstract
An analytical viscoelastic model is proposed to predict the time-dependent displacement of adhesive anchoring systems under axial tension. Using the correspondence principle, the elastic solution in Paper I has been extended to investigate the viscoelastic behavior of adhesive anchors. A model is developed to predict the creep behavior of adhesive anchoring systems, modeling the adhesive with a constant Poisson’s ratio. Epoxy-based adhesives are modeled by a Prony series approximation, that is derived from experimental data of the creep compliance. The capability and the applications of the proposed model are demonstrated by analyzing and comparing the proposed model to existing experimental data. The closed-form approximate solution is then verified with a finite-element model (FEM) for various geometric and material properties. Since the proposed mechanics-based model is developed for a general case, it can be used in the design and the analysis of different types of adhesive anchoring systems, therefore capable of predicting their long-term performance due to creep.
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Acknowledgments
This work is sponsored by the Department of Homeland Security CU09-1155 and the National Science Foundation CMMI 0954717, whose support is gratefully acknowledged. In addition, the authors had some discussions with Professor Gautam Dasgupta, whose comments and suggestions were very helpful to this work.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 2 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 12, 2012
Accepted: Feb 12, 2013
Published online: Feb 14, 2013
Published in print: Feb 1, 2014
Discussion open until: Mar 9, 2014
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