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Prediction Model for Fiber Splay Anchors in Strengthening Applications
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Prediction Model for Fiber Splay Anchors in Strengthening Applications
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Prediction Model for Fiber Splay Anchors in Strengthening Applications
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Journal Article
Prediction Model for Fiber Splay Anchors in Strengthening Applications
2025
Overview
Extensive experimental verification has shown that the use of fiber-reinforced polymer (FRP) anchors in combination with externally bonded FRP composites increases the flexural capacity of existing reinforced concrete (RC) structures. Thus, a rational prediction model is introduced in this study so that fiber splay anchors may be accurately designed for practical strengthening applications. Simplified structural mechanics principles are used to build this model for capacity prediction of a group of fiber splay anchors used for FRP flexural strengthening. Three existing test series using fiber splay anchors to secure FRP-strengthened T-beams, block-scale, and one-way slabs were used to calibrate and verify the accuracy and applicability of the present model. The present model is shown to yield very accurate predictions when compared to the results of the block-scale specimen and eight different one-way slabs. The proposed model is also compared with the predictions of a design equation adapted from the case of channel shear connectors in composite concrete-steel construction. Results show a very promising correlation. Keywords: anchor shear capacity; bent fiber splay anchor; fiber-reinforced polymer (FRP) strengthening; prediction model.
