Behavior of FRP-Reinforced Concrete Element under Shear: Experimental and Analytical Investigations

摘要

Fiber Reinforced Polymer (FRP) has been widely used in strengthening civil engineering structures for decades. Well established analytical procedures can be applied to design strengthening systems for beams and columns in flexure, provided that special attention is paid to the bond between the concrete and FRP (Triantafillou, 1998). However, the study on shear behaviour is still immature. This paper presents the results of an on-going project aiming at developing a rational model to evaluate the behavior of FRP-strengthened RC elements subjected to pure shear load. To achieve this goal, a series of large-scale tests were conducted using the Universal Panel Tester housed at the University of Houston (UH). In the past three decades, the UH research group proposed a series of analytical models to predict the shear behavior of RC members, of which the most recent is the Softening Membrane Model (SMM). The SMM has been proven to be able to predict the whole stress-strain curve of the RC member under pure shear (Zhu and Hsu, 2002). By utilizing the new constitutive law proposed by Moslehy (2010), a new SMM-FRP was developed. The current test results show a good agreement with the results calculated by SMM-FRP.