Seismic Behavior of Coupled Shear Walls made with Ductile Fiber-Reinforced Cement-Based Composite

Abstract

No tall building is free of coupled shear walls; solid or single shear walls in structures is architecturally impractical design. The efficiency of coupled shear walls in tall buildings is the main factor for the performance of overall concrete structure during Earthquakes. The major aims of using coupled shear walls are to disperse more earthquake energy and give more stiffness to the structure. Mostly, the maximum seismic damage occurs in the coupled shear walls because they resistance most of the seismic force alone, (especially in walls foot and coupling beams). Ductile Fiber-Reinforced Cement-Based Composite(DFRCC) was developed to overcome the brittleness of conventional concrete and even high-strength one. Even though there is no significant compressive strength increase compared to conventional normal strength concrete(NSC) and high strength concrete (HSC). DFRCC is characterized by its high ductility, superior behavior in tension, excellent crack dispersion capacity, as well as good workability. There are no research works were found in the literature on its applications with coupled shear walls. So, the presented research covers this gap. The goal of this research is deeply study and understand the nonlinear behavior of coupled shear walls made with DFRCC. The seismic response of the DFRCC-coupled walls system was evaluated using nonlinear static pushover analysis and compared with the response of coupled walls system made with NSC & HSC. More ductile deformations occurred in the DFRCC -coupled shear walls and more seismic energy dissipation was also attained.