Title:
Unified Strength Model for Spiral-Steel Confined Concrete Columns
Author(s):
Muhammad Junaid Munir, Syed Minhaj Saleem Kazmi, and Yu-Fei Wu
Publication:
Structural Journal
Volume:
119
Issue:
2
Appears on pages(s):
247-255
Keywords:
concrete columns; confinement; Hoek-Brown peak strength criterion; recycled aggregate concrete; steel spirals; strength
DOI:
10.14359/51734340
Date:
3/1/2022
Abstract:
Existing strength models of spiral-steel confined natural aggregate concrete (NAC) are based on the Richart et al. model. Furthermore, scant work related to the strength model of spiral-steel confined recycled aggregate concrete (RAC) is available in the literature. This paper focuses on developing a unified strength model for spiral-steel confined circular NAC and RAC columns based on the Hoek-Brown peak strength criterion. The Hoek-Brown peak strength criterion applies to the strengthening of concrete members with existing damage and can be extended to the performance enhancement of RAC through spiral-steel confinement. The performance of existing and proposed models is evaluated through a test database comprising the wide-ranging experimental results of spiral-steel confined circular concrete columns. Results show that the proposed model can effectively predict the peak strength of spiral-steel confined circular NAC and RAC columns, leading to structural applications of RAC.