Experimental and analytical study of stainless steel self-centering beam-to-column joints with PTS-AC connections

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-22 DOI:10.1016/j.tws.2025.113306

Jundong Gao , Hui Qian , Jiannan Ye , Huanxin Yuan , Xiaobo Si , Zhe Zhang , Xun Zhang

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引用次数: 0

Abstract

The philosophy of earthquake resilience has been a research hotspot of the structural seismic design. The self-centering mechanism is herein introduced into stainless steel beam-to-column joints by using post tensioned strand and angle cleat (PTS-AC) connections. Three self-centering joints fabricated from carbon steels, austenitic and duplex stainless steels were tested subjected to cyclic loading, as well as one carbon steel benchmark joint. The obtained results were discussed in detail, including deformation characteristics, experimental curves, structural properties, strain variation in local regions, stiffness and strength degradation, accumulated energy, and self-centering ability. The separation from angle flanges to column flanges was qualitatively assessed by the attenuated amplitudes and energies of signals measured using the smart aggregate-based active sensing approach. Afterwards, the existing calculation approach based on the component method was supplemented to predict the initial rotational stiffness, decompression moment and plastic moment of self-centering specimens with PTS-AC connections, and the accuracy of proposed formulas was verified with experimental structural properties.

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采用PTS-AC连接的不锈钢自定心梁柱节点试验与分析研究

抗震原理一直是结构抗震设计的研究热点。本文将自定心机制引入到采用后张钢绞线和角夹角（PTS-AC）连接的不锈钢梁柱节点中。对碳钢、奥氏体和双相不锈钢制成的3个自定心接头以及1个碳钢基准接头进行了循环加载试验。对所得结果进行了详细的讨论，包括变形特性、实验曲线、结构特性、局部应变变化、刚度和强度退化、累积能量和自定心能力。采用基于智能聚合体的主动传感方法，通过测量信号的衰减幅度和能量，定性地评估了从角法兰到柱法兰的分离。随后，补充现有的基于构件法的计算方法，对PTS-AC连接自定心试件的初始转动刚度、减压弯矩和塑性弯矩进行预测，并通过试验结构性能验证所提公式的准确性。

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.