Strain-hardening effect on the flexural behavior of ultra-high-performance fiber-reinforced concrete beams with steel rebars

被引：8

作者：

Yoo, Doo-Yeol ^{[1
]}

Soleimani-Dashtaki, Salman ^{[2
]}

Oh, Taekgeun ^{[1
]}

Chun, Booki ^{[3
]}

Banthia, Nemkumar ^{[2
]}

Lee, Seung-Jung ^{[4
]}

Yoon, Young -Soo ^{[5
]}

机构：

[1] Yonsei Univ, Dept Architecture & Architectural Engn, 50 Yonsei Ro, Seoul 03722, South Korea

[2] Univ British Columbia, Dept Civil Engn, 6250 Appl Sci Lane, Vancouver, BC V6T 1Z4, Canada

[3] Hanyang Univ, Dept Architectural Engn, 222 Wangsimni Ro, Seoul 04763, South Korea

[4] Incheon Natl Univ, Dept Civil & Environm Engn, 119 Acad ro, Incheon 22012, South Korea

[5] Korea Univ, Sch Civil Environm & Architectural Engn, 145 Anam Ro, Seoul 02841, South Korea

来源：

DEVELOPMENTS IN THE BUILT ENVIRONMENT | 2024年 / 17卷

基金：

新加坡国家研究基金会;

关键词：

Ultra-high-performance fiber-reinforced concrete; Steel fiber effect; Tensile characteristics; Ductility; Fiber orientation coefficient; Inverse analysis; MECHANICAL-PROPERTIES; UHP-FRC; STRENGTH; ORIENTATION; GFRP;

D O I：

10.1016/j.dibe.2024.100343

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study evaluated the effects of volume fraction, aspect ratio, and shape of steel fibers on the mechanical properties of ultra -high-performance fiber -reinforced concrete (UHPFRC) and the structural behavior of reinforced (R-) UHPFRC beams. The tensile strength and energy absorption capacity of ultra -high-performance concrete (UHPC) are improved by adding steel fibers and increasing its volume contents by up to 3.0 %. Compared with short straight steel fiber, medium -length straight and twisted fibers at a volume fraction of 2.0 % result in twice higher energy absorption capacity and higher flexural strength of R-UHPFRC beams. The flexural strength of R-UHPC beams increases by increasing the fiber content up to 3.0 %. However, the strain -hardening characteristics of UHPFRC negatively influence the cracking behavior and stress redistribution in structural beams, causing 48.2-54.1 % lower ultimate ductility indices. The small amounts of steel fibers with volume fraction of <= 1.0 % that exhibit strain -softening behavior only improve the peak ductility.

引用

页数：16

共 53 条

[1] ABAQUS, 2021, ABAQUS User's Manual, P2021
[2] Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High-Strength Concrete Hollow Beams
Abbass, Ahmmad
Abid, Sallal
Ozakca, Mustafa
[J]. ADVANCES IN CIVIL ENGINEERING, 2019, 2019
[3] ACI Committee 239, 2012, ACI FALL CONV
[4] [Anonymous], 2008, Concrete Engineering, P82
[5] [Anonymous], 2013, ULTRA HIGH PERFORMAN
[6] ASHOUR SA, 1993, ACI STRUCT J, V90, P279
[7] Effect of compressive strength and tensile reinforcement ratio on flexural behavior of high-strength concrete beams
Ashour, SA
[J]. ENGINEERING STRUCTURES, 2000, 22 (05) : 413 - 423
[8] Flexural behaviour of rebar-reinforced ultra-high-performance concrete beams
Chen, Shiming
Zhang, Rui
Jia, Liang-Jiu
Wang, Jun-Yan
[J]. MAGAZINE OF CONCRETE RESEARCH, 2018, 70 (19) : 997 - 1015
[9] FLEXURAL ANALYSIS OF REINFORCED-CONCRETE BEAMS CONTAINING STEEL FIBERS - DISCUSSION
ESPION, B
[J]. JOURNAL OF STRUCTURAL ENGINEERING-ASCE, 1994, 120 (06): : 1932 - 1934
[10] Experimental and numerical investigations on flexural performance of ultra-high-performance concrete (UHPC) beams with wet joints
Feng, Zheng
Li, Chuanxi
Ke, Lu
Yoo, Doo-Yeol
[J]. STRUCTURES, 2022, 45 : 199 - 213

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