Bond Behavior of Spiral Ribbed Ultra-high Strength Steel Rebar Embedded in Plain and Steel Fiber Reinforced High-Strength Concrete

被引：27

作者：

Li, Xiangyu ^{[1
]}

Zhang, Jianwei ^{[1
]}

Liu, Juan ^{[1
]}

Cao, Wanlin ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

来源：

KSCE JOURNAL OF CIVIL ENGINEERING | 2019年 / 23卷 / 10期

基金：

中国国家自然科学基金;

关键词：

ultra-high strength steel bar; high-strength concrete; steel fiber-reinforced concrete; pullout test; bond strength; bond stress-slip relationship; SLIP RESPONSE; DEFORMED BARS; PERFORMANCE; STRESS; TENSILE;

D O I：

10.1007/s12205-019-2449-0

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The bond behavior of spiral ribbed ultra-high strength (SRUHS) steel rebar embedded in plain high strength concrete (HSC) and steel fiber reinforced high strength concrete (SFRHSC) is experimentally studied using pull-out tests. The influencing factors of concrete type, embedded length, cover thickness and stirrup ratio are considered and the bond failure characteristics as well as the whole process of stress-slip behavior are analyzed. The research shows good anchorage ductility between SRUHS steel rebar and HSC. Since SRUHS steel rebars have continuous spiral bite teeth with concrete, the concrete in the rib dales is not easily sheared off, thereby leading to a reliable bond strength. Compared to specimens without steel fibers, steel fiber reinforcement can increase the ultimate bond strength, bond stiffness and residual strength. Meanwhile, it will also reduce the influence of cover thickness, stirrup ratio on the specimens with steel fibers. Finally, a prediction calculation for ultimate bond stress and an analytical model for bond stress-slip relation are proposed, which match well with test results.

引用

页码：4417 / 4430

页数：14

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