Response of high-strength concrete beams with corrugated discrete steel fibers to small shear span-depth ratios

Frontiers in Built Environment

Built Environment

Majed Alzara¹  Ahmed M. Yosri¹  Saif Eldeen A. S. Yousef²  Ahmed Farouk Deifalla³ 

[1] Department of Civil Engineering, College of Engineering, Jouf University, Sakakah, Saudi Arabia;Department of Civil Engineering, Faculty of Engineering, Al-Baha University, Al Bahah, Saudi Arabia;Structural Engineering and Construction Management Department, Future University in Egypt, New Cairo, Egypt;

关键词: high-strength;    fiber-reinforced concrete;    failure mode;    shear span-to-depth ratio;    fiber content;   

DOI  :  10.3389/fbuil.2023.1156261

 received in 2023-02-01, accepted in 2023-02-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

The behavior of high-strength, fiber-reinforced concrete (HSFRC) beams under concentrated loads was affected by many different aspects, such as the type of fibers used and the volume percent of the fibers; nevertheless, the behavior was primarily affected by modifying the shear span-to-depth ratio (a/d). In this experimental investigation, the influence of a/d ratios (ranging from 1.5 to 2.2) is investigated on the response of twelve high-strength fiber-reinforced concrete (HSFRC) beams containing varying amounts of discontinuous steel fiber (vf) in the concrete mixture. The purpose of this study was to analyze the manner of failures of the tested beams and to identify a limiting a/d for effective beam depth. Shear failure was observed in high-strength concrete (HSRC) beams with a vf of 0% at a/d ratios as high as 2.2, according to the findings of the study. Altering either the a/d ratios or the vf had an effect on the way in which the HSFRC beams responded to the stimulus. Some of the HSFRC beams that were put through the shear–flexure test failed. In addition, the findings demonstrated that, as the a/d ratio increased up to 2.2, the beams with a vf of 0.5% and 0.75% broke in pure flexure with multi-cracking. This indicates that the a/d ratio has a substantial impact on the various failure behaviors of HSFRC beams.

【 授权许可】

Unknown   
Copyright © 2023 Alzara, Yosri, Yousef and Deifalla.