Title:
Prediction Model for Fiber Splay Anchors in Strengthening Applications
Author(s):
Mustafa M. Raheem and Hayder A. Rasheed
Publication:
Structural Journal
Volume:
122
Issue:
3
Appears on pages(s):
49-56
Keywords:
anchor shear capacity; bent fiber splay anchor; fiber-reinforced polymer (FRP) strengthening; prediction model
DOI:
10.14359/51745639
Date:
5/1/2025
Abstract:
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.