Title:
Strength Modeling of Concrete Deep Beams Reinforced with Internal Fiber-Reinforced Polymer
Author(s):
Matthias F. Andermatt and Adam S. Lubell
Publication:
Structural Journal
Volume:
110
Issue:
4
Appears on pages(s):
595-606
Keywords:
deep beams; fiber-reinforced polymer reinforcement; reinforced concrete; shear; shear span-depth ratio (a/d); strut and tie
DOI:
10.14359/51685745
Date:
7/1/2013
Abstract:
It is well-known that arch action in deep concrete members provides a beneficial increase in strength. However, while specific design code provisions are available for steel-reinforced deep members that account for this influence, current design code provisions for members containing internal fiber-reinforced polymer (FRP) reinforcement do not consider the capacity obtained from arch action. Strut-and-tie-based modeling approaches for FRP-reinforced members were developed through the adaptation of existing models for steel-reinforced concrete deep members. When compared to test results for large-scale members with small shear span-depth ratios (a/d), the recommended strut-and-tie model (STM) is shown to be in better agreement than existing shear provisions for FRP-reinforced members. The proposed STM is also shown to accurately account for influences on capacity from the reinforcement ratio, reinforcement stiffness, and overall member height.