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Title: Impact of Geometry and Detailing on Drift Capacity of Slender Walls

Author(s): Christopher L. Segura Jr. and John W. Wallace

Publication: 318Reference



Appears on pages(s): 885-895

Keywords: boundary element; compression strain; confinement; detailing; drift capacity; reinforced concrete; shear wall, structural wall; wall thickness


Date: 5/1/2018

Recent earthquakes and laboratory tests have demonstrated that thin, slender walls may not possess the deformation levels allowed in U.S. codes and standards. A study of the lateral drift capacity of well-detailed walls was conducted, indicating equivalent performance is not expected for all walls that satisfy ACI 318-14 provisions. A lateral drift capacity prediction equation was developed in a displacement-based design format and was shown to agree with experimentally measured drift capacities for a small database of slender wall laboratory tests. It was demonstrated that, in addition to provided boundary transverse reinforcement, drift capacity of slender walls is most impacted by compression depth (c), wall thickness (b), and wall length (lw). Based on experimental data, drift capacities greater than 2% may be expected for codecompliant walls designed such that c/b < 2.5, while drifts lower than 1% are expected when c/b > 5.0.