Abstract
Contemporary structures can resist earthquakes as they deform and dissipate energy. However, during strong ground motions, these structures can sustain significant concrete damage and overall permanent deformations. Therefore, it is of great benefit if earthquake-resisting structures can deform and dissipate energy, and yet sustain mitigated damage. This paper illustrates the findings of an experimental study focused on the mitigation of damage and reduction of residual displacements in reinforced concrete (RC) shear walls. In this study, the cyclic properties of two innovative shear walls—a slender and a squat wall—which were cast with fiber-reinforced cementitious composites and reinforced with steel and glass fiber reinforced polymer bars are investigated. Then, the improvements of the innovative specimens with respect to two conventional RC shear walls are discussed in terms of damage propagation, self-centering, stiffness retention and energy dissipation. As the experiments showed, the innovative walls sustained mitigated concrete damage and less residual drift ratios while illustrating significant stiffness and energy dissipation capacities.
Highlights
Fiber reinforced polymer (FRP) is a material composed of a polymeric matrix reinforced with fibers of aramid, carbon or glass
Since FRP has a superior strength-to-weight ratio and high durability characteristics with respect to conventional steel, it has been considered as an alternative material in the construction and retrofitting of reinforced concrete (RC) structures
Mohamed et al [2] studied the response of 14 full-scale circular columns which were reinforced with longitudinal and transverse FRP bars
Summary
Fiber reinforced polymer (FRP) is a material composed of a polymeric matrix reinforced with fibers of aramid, carbon or glass. FRP bars are used to reinforce concrete members in longitudinal or transverse directions. Mohamed et al [2] studied the response of 14 full-scale circular columns which were reinforced with longitudinal and transverse FRP bars. The study included the testing of one steel-reinforced specimen and three fully glass fiber reinforced polymer (GFRP) reinforced concrete shear walls. The GFRP-reinforced walls illustrated satisfactory levels of deformability and more substantial self-centering properties in comparison to the steel-reinforced shear wall of the study. Sci. 2018, 2, 55 deformability and more substantial self-centering properties in comparison to the steel-reinforced shear wall of the study. Due to the linear behavior of GFRP bars, energy in comparison walls to thedissipated steel reinforced wall. To the energy dissipation capacity the GFRP-reinforced less energy in improve comparison to the steel reinforced wall.and.
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