Experimental Evaluation of Shape Memory Alloy Retrofitting Effect for Circular Concrete Column Using Ultrasonic Pulse Velocity

International Journal of Concrete Structures and Materials

Research

Saebyeok Jeong¹  Taemin Lee²  Hajin Choi²  Ukyong Woo²  Donghyuk Jung³ 

[1] Department of Architectural Engineering, Pusan National University, Busan, Republic of Korea;School of Architecture, Soongsil University, Seoul, Republic of Korea;School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea;

关键词: Shape memory alloy;    Ultrasonic;    Retrofit;    Concrete column;    Piloti;   

DOI  :  10.1186/s40069-022-00574-0

 received in 2022-10-05, accepted in 2022-11-16,  发布年份 2022

来源: Springer

【 摘 要 】

The seismic performance of a concrete column retrofitted with an iron-based shape memory alloy (Fe-SMA) was evaluated under cyclic loading. In addition to structural behavior, internal damage was monitored using an ultrasonic pulse velocity test. The round shapes of three reinforced concrete (RC) columns were tested: a non-retrofitted RC column as a control, a carbon fiber-reinforced polymer (CFRP) column, and an Fe-SMA retrofitted column. During the cyclic loading test, the degradation of the column was defined based on the decrease in compressional wave velocities. The experimental results demonstrated a maximum improvement of 175% in seismic performance of the Fe-SMA retrofitted RC column compared with the controlled column. This is primarily owing to the active constraints of the SMA, which were quantified based on ultrasonic velocities. Furthermore, the surface degradation process was identified using external cracks, which were not visible in the CFRP retrofitted RC column.

【 授权许可】

CC BY   
© The Author(s) 2022

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