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Advances in Materials Science and Engineering
Volume 2013, Article ID 521404, 13 pages
http://dx.doi.org/10.1155/2013/521404
Research Article

Analysis of the Dynamic Response in Blast-Loaded CFRP-Strengthened Metallic Beams

1College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
2Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058, China

Received 26 February 2013; Revised 30 May 2013; Accepted 4 June 2013

Academic Editor: Roham Rafiee

Copyright © 2013 Zhenyu Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Carbon fiber-reinforced polymer composites (CFRPs) are good candidates in enhancing the blast resistant performance of vulnerable public buildings and in reinforcing old buildings. The use of CFRP in retrofitting and strengthening applications is traditionally associated with concrete structures. Nevertheless, more recently, there has been a remarkable aspiration in strengthening metallic structures and components using CFRP. This paper presents a relatively simple analytical solution for the deformation and ultimate strength calculation of hybrid metal-CFRP beams when subjected to pulse loading, with a particular focus on blast loading. The analytical model is based on a full interaction between the metal and the FRP and is capable of producing reasonable results in a dynamic loading scenario. A nonlinear finite element (FE) model is also developed to reveal the full dynamic behavior of the CFRP-epoxy-steel hybrid beam, considering the detailed effects, that is, large strains, high strain rates in metal, and different failure modes of the hybrid beam. Experimental results confirm the analytical and the FE results and show a strong correlation.