Title: Model for Inelastic Biaxial Bending Interaction of Reinforced Concrete Beam-Columns

Author(s): SashiI K. Kunnath and AndreiI M. Reinhorn

Publication: Structural Journal

Volume: 87

Issue: 3

Appears on pages(s): 284-291

Keywords: beam-column frame; biaxial loads; deterioration; earthquake-resistant structures; hysteresis; models; plasticity; reinforced concrete; stiffness; strength; Design

DOI: 10.14359/3107

Date: 5/1/1990

Abstract:
Presents an efficient model for inelastic biaxial bending interaction of reinforced concrete sections. Based on a rate-dependent viscoplastic equation, it is shown that the model is extremely versatile and has the capability to incorporate stiffness and strength decay. The model also enables identification of the physical nature of interaction and achieves a controlled hysteretic behavior. Only uniaxial information is required for the material parameters that describe the model. Unlike other conventional reinforced concrete models, no loop tracing is necessary, thereby making it simple, efficient, and readily suitable for use with large computational models for analyzing reinforced concrete building structures. The validity of the proposed scheme is demonstrated through the analytical simulation of available biaxial experiments on reinforced concrete columns and comparison with other analytical models.