Title: Nonlinear Modeling Parameters and Acceptance Criteria for Concrete Columns

Author(s): W. M. Ghannoum and A.B. Matamoros

Publication: Symposium Paper

Volume: 297

Issue:

Appears on pages(s): 1-24

Keywords: concrete, columns, nonlinear, modeling parameters, acceptance criteria, bi-directional, cyclic, seismic

DOI: 10.14359/51686898

Date: 3/6/2014

Abstract:
A database of 490 pseudo-static tests of reinforced concrete columns subjected to load reversals was used to evaluate nonlinear modeling parameters that define the lateral force versus lateral deformation envelope relation of columns under seismic excitations. Based on the modeling parameters, criteria that identify acceptable deformation levels at various performance objectives are proposed. The effects of bi-directional loading and number-of-cycles of the displacement history on the drift ratio at axial failure are discussed, and recommendations are given to account for such effects. Modeling parameters and acceptance criteria are provided in a format that is consistent with provisions of the ASCE 41-06 Standard entitled “Seismic Rehabilitation of Existing Structures”.