Shear resistance of steel fiber-reinforced concrete beams without conventional shear reinforcement on the basis of the critical shear band concept

Duc Tung Nguyen*, Viet Tue Nguyen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Recently, a concept to estimate the shear capacity of slender reinforced concrete beams without stirrups by examining the principal tensile stress within the shear span was introduced. Considering the existence of both the concrete normal stress and the shear stress in the tension zone, the calculated principal tensile stress is in excess of the concrete tensile strength in a narrow band in this concept. In this band, damage in form of micro-cracking is assumed. The critical shear crack is formed by coalescence of micro-cracks when the damaged band reaches a critical size. By limiting the tensile cracking in the shear band, steel fibers can postpone the critical shear crack development and, thus, enhance the shear resistance in this concept. This paper presents an extension of this method to estimate the shear capacity of slender steel fiber-reinforced concrete beams without conventional shear reinforcement. The proposed method is shown to properly estimate the shear resistance of a large set of available test data, being able to account for most influencing parameters.
Original languageEnglish
Pages (from-to)698-707
JournalEngineering Structures
Volume168
DOIs
Publication statusPublished - 2018

Cite this