Title: Modeling of Glass Fiber-Reinforced Polymer-Reinforced Squat Walls under Lateral Loading

Author(s): Ju-Hyung Kim, Yail J. Kim, and Hong-Gun Park

Publication: Structural Journal

Volume: 121

Issue: 3

Appears on pages(s): 201-214

Keywords: failure mode; glass fiber-reinforced polymer (GFRP); modeling; shear; squat wall

DOI: 10.14359/51740489

Date: 5/1/2024

Abstract:
This paper presents mechanics-based modeling approaches to understand the shear behavior of squat walls reinforced with glass fiber-reinforced polymer (GFRP) bars when subjected to lateral loading. The applicability of design provisions in published specifications is examined using collated laboratory test data, resulting in the need for developing revised guidelines. Analytical studies are undertaken to evaluate the effects of reinforcement type on the response of load-bearing walls and to establish failure criteria as a function of various stress states in constituents. Obvious distinctions are noticed in the behavior of squat walls with steel and GFRP reinforcing bars owing to their different reinforcing schemes, tension-stiffening mechanisms, and material properties. Newly proposed equations outperform existing ones in terms of predicting the shear capacity of GFRP-reinforced squat walls. Furthermore, based on geometric and reinforcing attributes, a novel determinant index is derived for the classification of structural walls into squat and slender categories, which overcomes the limitations of prevalent methodologies based solely on aspect ratio. A practical method is suggested to adjust the failure mode of walls with GFRP reinforcing bars, incorporating a characteristic reinforcement ratio.