Experimental investigation on hysteretic properties and applications in beam-column connections of shape memory alloy plates

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-30 DOI:10.1016/j.tws.2024.112650

Yi Su , Jin Di , Xuhong Zhou , Bin Han , Fengjiang Qin , Long Hu , Jie Wang

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引用次数: 0

Abstract

Shape memory alloy (SMA) plates have demonstrate significant application prospects in seismic structures owing to their excellent mechanical behaviour and section adaptability. In this study, the mechanical properties and manifestations of SMA plates, particularly their cyclic tension-release behaviour, were systematically investigated. Analysis results of peak strength, self-centring capacity, and energy dissipation capacity showed that thickness, temperature, and loading protocol affect the hysteretic properties of SMA plates. Furthermore, an effective training scheme of constant 4 % tensile strain, which can significantly increase the ultimate strength and self-centring capacity, was suggested for SMA plates to withstand cyclic tensile loads. Subsequently, a beam-column connection equipped with SMA plates was designed, and a set of quasi-static tests and numerical validations were conducted. The results verified the excellent self-centring capacity of the SMA plates, and the superiority and potential of applying SMA plate to aseismic structures were confirmed. Simultaneously, the SMA plates exhibited a lower energy dissipation capacity than the commonly used Q160 and ALA plates, which indicates that paralleling with other energy dissipation members is beneficial for improving the hysteretic properties of structures.

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形状记忆合金板滞回特性的实验研究及其在梁柱连接中的应用

形状记忆合金（SMA）板材因其卓越的机械性能和截面适应性，在抗震结构中展现出巨大的应用前景。本研究系统地研究了 SMA 板的力学性能和表现形式，特别是其循环拉伸释放行为。峰值强度、自定中心能力和能量耗散能力的分析结果表明，厚度、温度和加载协议会影响 SMA 板的滞后特性。此外，还提出了一种有效的恒定 4% 拉伸应变训练方案，可显著提高 SMA 板承受循环拉伸载荷的极限强度和自聚能力。随后，设计了装有 SMA 板的梁柱连接，并进行了一系列准静态试验和数值验证。结果验证了 SMA 板出色的自聚能力，并证实了将 SMA 板应用于抗震结构的优越性和潜力。同时，SMA 板的耗能能力低于常用的 Q160 板和 ALA 板，这表明与其他耗能构件并联有利于改善结构的滞回特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.