Factors that Affect the Drift at Axial Load Failure of Nonductile RC Buildings

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Title: Factors that Affect the Drift at Axial Load Failure of Nonductile RC Buildings

Author(s): Adolfo Matamoros

Publication: Special Publication

Volume: 313

Issue:

Appears on pages(s): 1-12

Keywords: Seismic, evaluation, concrete, collapse, drift ratio, column failure

Date: 3/1/2017

Abstract:
Since the late 1990s many physical simulations of nonductile reinforced concrete columns have been performed in North America with the goal of identifying the key parameters that affect the collapse safety margin of buildings during earthquakes. The first comprehensive study on this topic in North America focused on the behavior of nonductile flexure shear-critical columns with reinforcing details commonly used prior to 1970. These early experiments evaluated the effect of axial load and amount of transverse reinforcement on the drift ratio at axial failure of columns, and led to the development of a shearfriction failure model. A recent experimental program funded by the National Science Foundation significantly expanded the experimental data set on column axial failure under load reversals. Experiments were conducted to investigate the behavior of shear-critical columns, and to evaluate the effect of shear span-to-depth ratio and displacement history on the drift ratio at axial failure of nonductile columns. The main findings of this experimental program are presented.