Title: Behavior and Modeling of Infill Fiber-Reinforced Concrete Damper Element for Steel-Concrete Shear Wall

Author(s): Zuming Xia and Antoine E. Naaman

Publication: Structural Journal

Volume: 99

Issue: 6

Appears on pages(s): 727-739

Keywords: fiber-reinforced concrete; seismic; shear

DOI: 10.14359/12337

Date: 11/1/2002

Abstract:
This paper presents the results of an analytical and experimental investigation on a new seismic shear wall. The wall comprises two edge steel columns connected by infilled fiber-reinforced concrete damper elements (FRC-IDE) made using high-performance fiber-reinforced cement composites (HPFRCCs). HPFRCCs offer excellent combinations of properties such as strength, toughness, energy absorption, stiffness, ductility, and damping resistance. The infilled FRC damper elements, which are meant to act as energy dissipaters and dampers under monotonic and reversed cyclic loading, are designed to dissipate energy by a shear-friction mechanism. They are slotted and notched at midsection to ensure the desired behavior. Fourteen IDE specimens were tested in this study with the objective of obtaining a better understanding of the seismic response of this innovative hybrid wall system including its mechanism, behavior, modeling, and analysis. Several parameters were investigated selectively: two different aspect ratios (a/d = 1.5 and a/d = 1), three different dowel reinforcement ratios, three different fibers (30 mm-long hooked steel fibers, 50 mm-long hooked steel fibers, and Spectra fibers), two different configurations (vertical and horizontal) and three different matrix (slurry for slurry infiltrated fiber concrete [SIFCON], mortar, and concrete). The performance of the infilled FRC-IDEs was evaluated in terms of cracking and failure mode, strength, displacement and rotation ductilities, shear deformation, energy dissipation, and stiffness deterioration under cyclic loading.