Flexural behaviour of RC beams with a UHPFRC top layer and hybrid reinforcement of steel and glass fiber reinforced polymer bars

被引：4
作者：
Abadel, Aref A. [1 ]
机构：
[1] King Saud Univ, Coll Engn, Dept Civil Engn, Riyadh 11421, Saudi Arabia
来源：
CASE STUDIES IN CONSTRUCTION MATERIALS | 2024年 / 21卷
关键词：
Concrete; Flexural failure; GFRP bars; Hybrid bars; Steel fiber; UHPFRC; CONCRETE BEAMS; PERFORMANCE; GFRP; STRENGTH; DESIGN;
D O I：
10.1016/j.cscm.2024.e04017
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study aims to conduct an experimental investigation of the flexural behavior of reinforced concrete (RC) beams reinforced with hybrid steel and glass fiber-reinforced polymer (GFRP) bars. The influence of employing ultra-high-performance fiber-reinforced concrete (UHPFRC) as top layers on the beams are also investigated. Eight under-reinforced concrete beams measuring 120 x 185 x 1500 mm underwent four-point flexure testing. These beams were divided into two groups: Group "1" beams had their tension strength improved by using GFRP bars, whereas Group "2" investigated the improvement of tension strength by using GFRP bars and compression strength by using a UHPFRC mix for the top layer of beams. The study's objectives include analyzing the crack pattern, failure mode, first-crack and ultimate loads, load-deflection behavior, bar strain curves, first-crack and ultimate moments, and energy ductility. The results show that using a hybrid system consisting of steel and GFRP bars for longitudinal reinforcement, together with UHPFRC as top layers, resulted in a significant improvement in RC beams' flexure capacity.
引用
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页数：18
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