Title: Sliding Shear Resistance of Squat Walls under Reverse Loading: Mechanical Model and Parametric Study

Author(s): Harald Schuler and Burkhart Trost

Publication: Structural Journal

Volume: 113

Issue: 4

Appears on pages(s): 711-721

Keywords: aggregate interlock; cold joint; curvature ductility; dowel action; earthquake loads; reverse loading; sliding shear failure; squat walls

DOI: 10.14359/51688748

Date: 7/1/2016

Abstract:
Shear walls are used to stabilize buildings against earthquakes under cyclic loading. A critical state in the loading procedure is the second half cycle (reverse loading) because a crack is opened along the complete wall length. This results in reduced sliding shear resistance, especially at cold joints, which are weak points. The article presents a model to analyze the sliding shear resistance on a flexural crack. The model is set up as a failure criterion plotted against the moment-curvature curve. It allows the studying of the single effects, aggregate interlock and the load-carrying capacity of the inclined compression strut, and dowel action and shear resistance of the reinforcement on the sliding shear resistance. A parametric study is carried out to investigate the influence of an axial force and different web reinforcement ratios.