Shear Strengthening of RC Beams Incorporating Post-Tensioned Bars and Engineered Cementitious Composite Reinforced with Palm Fronds

被引:0
|
作者
Hamoda, Ahmed [1 ]
Abadel, Aref A. [2 ]
Sennah, Khaled [3 ]
Ahmed, Mizan [4 ]
Zhang, Xihong [4 ]
Emara, Mohamed [5 ,6 ]
机构
[1] Kafrelsheikh Univ, Fac Engn, Dept Civil Engn, Kafrelsheikh 6860404, Egypt
[2] King Saud Univ, Coll Engn, Dept Civil Engn, Riyadh 11421, Saudi Arabia
[3] Toronto Metropolitan Univ, Dept Civil Engn, Toronto, ON M5B 2K3, Canada
[4] Curtin Univ, Ctr Infrastructure Monitoring & Protect, Sch Civil & Mech Engn, Kent St, Bentley, WA 6102, Australia
[5] Zagazig Univ, Fac Engn, Struct Engn Dept, POB 44519, Zagazig 7120001, Egypt
[6] Delta Higher Inst Engn & Technol, Dept Civil Engn, Talkha 7623184, Egypt
关键词
shear strengthening; palm fronds; post-tensioned steel bars; engineered cementitious composite; experimental testing; numerical analysis; CONCRETE BEAMS; FLEXURAL BEHAVIOR; ECC; FIBERS;
D O I
10.3390/buildings14103277
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper investigates, experimentally and numerically, the shear strengthening of Normal Concrete (NC) beams using post-tensioning steel bars and Engineered Cementitious Composite (ECC) reinforced with chemically cured Palm Fronds (PFs). The benefits of strain-hardening ECC and the tensile strength of PFs cured with 6% wt Alkali NaOH solution beside post-tensioned bars have been employed herein. Seven full-scale Reinforced Concrete (RC) beams were fabricated and experimented with under three-point loading until failure. The test parameters include the strengthening technique, type, and configuration of the material used for strengthening. The strengthening process has been implemented through two techniques: Externally Bonded Reinforcement (EBR) and Near-Surface Mounted (NSM) Reinforcement. The strengthening materials have been configured and placed in horizontal, vertical, and inclined positions. The effectiveness of the strengthening methods has been evaluated by examining their cracking propagations, load-deflection responses, collapse modes, elastic stiffness, and absorbed energy. It was found that the proposed strengthening systems could significantly control the crack pattern and failure mode, and they could enhance the ultimate load amplitude up to 37% and 50% for NSM ECC with PFs and EBR post-tensioning steel bars, respectively. Nonlinear three-dimensional finite element models of the tested beams were developed and validated with the test data, where it was found that finite element models predict the structural performance of tested beams with a maximum error of only 2%.
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页数:25
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