Journal
COMPUTERS & STRUCTURES
Volume 117, Issue -, Pages 105-117Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2012.12.002
Keywords
Three-dimensional (3-D) analysis; Meso-scale modeling; Finite element (FE) modeling; Near surface mounted (NSM) FRP; Strip; Bond behavior
Funding
- Research Grants Council of the Hong Kong Special Administrative Region [PolyU 5173/04E]
- National Basic Research Program of China (i.e. the 973 Program) [2012CB026201]
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This paper presents a three-dimensional (3-D) meso-scale finite element (FE) model for near-surface mounted (NSM) FRP strip-to-concrete bonded joints established using the general-purpose FE software package MSC.MARC. In the FE model, elements of the order of I mm in size are employed. The concrete is simulated using the orthogonal fixed smeared crack model while the FRP and the adhesive are treated as linear brittle-cracking materials. The FE model is calibrated and verified using results of well-documented bonded joint tests. Using the verified FE model, the failure process of NSM FRP strip-to-concrete bonded joints is carefully studied; furthermore, the local bond stress distributions and the bond-slip relationships are extracted and analyzed. This 3-D meso-scale FE model offers a powerful tool for deployment in further investigations to establish bond-slip models and bond strength models for NSM FRP strip-to-concrete bonded interfaces. While the present study is focused on NSM FRP strips, the proposed modeling approach is generally applicable to NSM FRP bars of other cross-sectional shapes. (C) 2012 Elsevier Ltd. All rights reserved.
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