Title: Nonlinear Modeling Parameters and Acceptance Criteria for Interior Slab-Column Connections

Author(s): Yan Zhou and Mary Beth D. Hueste

Publication: Structural Journal

Volume: 119

Issue: 1

Appears on pages(s): 145-154

Keywords: acceptance criteria; ACI 369.1; ASCE 41; nonlinear modeling parameters; performance-based design; post-tensioned; reinforced concrete; seismic evaluation; slab-column connections

DOI: 10.14359/51733009

Date: 1/1/2022

Abstract:
This paper reviews the lateral deformation capacity of reinforced concrete and post-tensioned slab-column (SC) connections and the corresponding ACI 369.1-17 and ASCE 41-17 modeling parameters for nonlinear analysis. An updated database of experiments for interior SC connection tests without shear reinforcement under combined gravity and lateral load effects has been documented. Proposed drift-based nonlinear modeling parameters are derived considering a detailed review of the backbone response of each individual SC connection specimen. Expressions for limiting drift ratios as a function of the gravity shear ratio are developed to describe the backbone response for nonlinear analysis, along with the limiting drifts for performance-based seismic evaluation. The recommended drift-based nonlinear modeling parameters and acceptance criteria are compared with the current provisions in ASCE 41-17.