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.