Discrete shear strength of two-and seven-circular-hoop and spiral transverse reinforcement
Journal
ACI Structural Journal
Journal Volume
113
Journal Issue
2
Pages
227-238
Date Issued
2016
Author(s)
Abstract
This study developed discrete computational shear strength (DCSS) models for two-circular-hoop, two-spiral, seven-circular-hoop, and seven-spiral transverse reinforcement for reinforced concrete columns. The DCSS models show that as a shear crack moves along the column, the reinforcement shear strength varies periodically. The critical shear crack, which yields the smallest shear strength, can be from any of the shear cracks that intercept at least one edge of a hoop series or spiral. The conditions are presented for when a shear crack intercepts the two edges of every hoop series or spiral, which leads to a drastic reduction in shear strength. At the critical shear crack condition, the DCSS models yield shear strength lower than the integral averaging method. To control the error of the integral averaging method, the ratio of the reinforcement spacing to hoop or spiral diameter should be limited. Charts to correct the error are presented for use in practice.
SDGs
Type
journal article