原文传递
Flexural strengthening of large-scale reinforced concrete beams using near-surface-mounted self-prestressed iron-based shape-memory alloy strips
| 题名： | Flexural strengthening of large-scale reinforced concrete beams using near-surface-mounted self-prestressed iron-based shape-memory alloy strips |
| 其他题名： | 1.CIRC(Canadian Infrastructure Report Card)Project Steering Committee.2016.Informing the Future:The Canadian Infrastructure Report Card.http://canadianin-frastructure.ca/downloads/Canadian_Infrastructure_Re-port_2016.pdf. |
| 正文语种： | 英文 |
| 作者： | Raafat El-Hacha |
| 关键词： | Fe-SMA;iron-based shape-memory alloy;rehabilitation;self-prestressing;shape-memory effect;SMA;SMA strip;strengthening |
| 摘要： | An experimental program was conducted to investigate the performance of large-scale reinforced concrete beams strengthened with near-surface-mounted iron-based shape-memory alloy (Fe-SMA) strips. Shape-memory alloys are a unique class of alloys with the ability to undergo large deformations and return to their original shape through stress removal by unloading or heating. Four beams were tested in total, including a control beam and three beams strengthened with near-surface-mounted Fe-SMA strips. One beam was strengthened with five nonactivated strips, and two beams were strengthened with five and seven activated Fe-SMA strips, respectively. The results revealed the effectiveness of the strengthening technique in enhancing the flexural performance of the strengthened beams at the service and ultimate load conditions. Furthermore, the strengthened beams failed in a ductile failure mode by crushing of concrete after yielding of the steel reinforcements and the Fe-SMA strips, similar to the behavior of an under-reinforced concrete beam. The performance of the strengthened beams was compared with similar beams strengthened with prestressed, near-surface-mounted carbon-fiber-reinforced polymer (CFRP) bars with comparable prestressing forces. The comparison revealed the superiority of the near-surface-mounted Fe-SMA in maintaining the ductile behavior of the beams compared with the brittle failure of near-surface-mounted CFRP-strengthened beams. |
| 出版年： | 2018 |
| 论文唯一标识： | J-30Y2018V63N06033 |
| 英文栏目名称： | Innovation |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 拼音刊名(出版物代码)： | J-30 |
| 卷： | 63 |
| 期： | 06 |
| 页码： | 55-65 |
相关文献
- Strengthening of prestressed concrete hollow-core slab openings using near-surface-mounted carbon-fiber-reinforced polymer reinforcement
- Experimental Investigation of Axial Compressive Behavior of Large-Scale Circular Concrete Columns Confined by Prestressed CFRP Strips
- Low-Temperature Mechanical Behavior of Fe-SMA for Structural Damping
- Experimental and Numerical Investigations on the Behavior and Failure Mechanism of RC Beams Strengthened with Near-Surface Mounted High-Strength Aluminum Alloy Bars
- Fe-SMA–Based Shear Panel Damper: Solution Treatment, Design, and Seismic Performance
- Numerical and digital image correlation study of the flexural behavior of prestressed ultra-high-performance concrete beams made from locally available materials
检索历史
应用推荐
