Title:
Prepublished: Prediction Model for Fiber Splay Anchors in Strengthening Applications
Author(s):
Mustafa M. Raheem and Hayder A. Rasheed
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
anchor shear capacity; bent fiber splay anchor; FRP strengthening; prediction model
DOI:
10.14359/51745639
Date:
2/11/2025
Abstract:
Extensive experimental verification has shown that the use of fiber-reinforced polymer (FRP) anchors in combination with externally bonded fiber-reinforced polymer composites increases the flexural capacity of existing Reinforced Concrete (RC) structures. Thus, a rational prediction model is introduced in this study so that the 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 utilizing 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.