Concept and behavior of controllable SMA plate-typed dampers for the whole phase of main-aftershock

被引：0

作者：

Peng, Zhanhui ^{[1
]}

Guan, Dongzhi ^{[1
]}

Luo, Xinyu ^{[1
]}

Liu, Jiabin ^{[1
]}

Li, Jin-Bao ^{[2
]}

机构：

[1] Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China

[2] Jiangsu Southeast Special Engn & Technol Co Ltd, Nanjing 210000, Peoples R China

来源：

STRUCTURES | 2025年 / 71卷

基金：

中国国家自然科学基金;

关键词：

Shape memory alloys; Damper; Main-aftershock; Seismic behavior; Cyclic loading; SHAKING TABLE TESTS; EARTHQUAKE; FRAMES; DAMAGE; NITI;

D O I：

10.1016/j.istruc.2024.108028

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The shape memory effect (SME) or superelastic (SE) properties of shape memory alloys (SMA) have been widely investigated in the field of structural engineering, however, the variability of mechanical properties in different phases has not been sufficiently emphasized. A controllable SMA plate-typed damper (CSPD) with the function to regulate the structural seismic performance in post mainshock was proposed based on the thermal-mechanical properties of SMA. The built-in heating device allows the SMA core plate to be heated, which subsequently excites the positive transformation of the mechanical properties for the damper. As the basis of this study, the differences in the fundamental mechanical properties of martensitic SMA and austenitic SMA were evaluated by monotonic tensile tests. Several cyclic loading tests were carried out on two SMA dampers and a Q235 damper to study the evolution of hysteresis performance under multiple loadings. The test results showed that the strength and energy dissipation capacity of CSPD could be strengthened with heating after the first loading. However, the martensitic SMA damper without heating showed superior resilience compared to CSPD.

引用

页数：12