Application of Cu-Al-Mn Superelastic Alloy Bars as Reinforcement Elements in Concrete Beams

被引：4

作者：

Shrestha, Kshitij C. ^{[1
]}

Araki, Yoshikazu ^{[1
]}

Nagae, Takuya ^{[2
]}

Yano, Hayato ^{[1
]}

Koetaka, Yuji ^{[1
]}

Omori, Toshihiro

Sutou, Yuji ^{[3
]}

Kainuma, Ryosuke ^{[3
]}

Ishida, Kiyohito ^{[3
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Architecture & Architectural Engn, Nishikyo Ku, Kyoto 6158540, Japan

[2] Natl Res Inst Earth Sci & Disaster Prevent, E Def, Miki, Kagawa 6730515, Japan

[3] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2012, PTS 1 AND 2 | 2012年 / 8345卷

关键词：

reinforced concrete; superelasticity; Cu-Al-Mn superelastic alloy bars; four-point bending; reverse cyclic loading;

D O I：

10.1117/12.914992

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Experimental works are done to assess the seismic behavior of concrete beams reinforced with superelastic alloy (SEA) bars. Applicability of newly developed Cu-Al-Mn SEA bars, characterized by large recovery strain, low material cost, and high machinability, have been proposed as partial replacements for conventional steel bars in order to reduce residual deformations in structures during and after intense earthquakes. Four-point reverse-cyclic bending tests were done on 1/3 scale concrete beams comprising three different types of specimens - conventional steel reinforced concrete (ST-RC), SEA reinforced concrete (SEA-RC), and SEA reinforced concrete with pre-tensioning (SEA-PC). The results showed that SEA reinforced concrete beams demonstrated significant enhancement in crack recovery capacity in comparison to steel reinforced beam. Average recovery of cracks for each of the specimens was 21% for ST-RC, 84% for SEA-RC, and 86% for SEA-PC. In addition, SEA-RC and SEA-PC beams demonstrated strong capability of re-centering with comparable normalized strength and ductility relative to conventional ST-RC beam specimen. ST-RC beam, on the other hand, showed large residual cracks due to progressive reduction in its re-centering capability with each cycle. Both the SEA-RC and SEA-PC specimens demonstrated superiority of Cu-Al-Mn SEA bars to conventional steel reinforcing bars as reinforcement elements.

引用

页数：10

共 4 条

[1] Potential of superelastic Cu-Al-Mn alloy bars for seismic applications [J].