Seismic behavior of cold-formed steel frames with double-layer X-shaped braced shear panels

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-27 DOI:10.1016/j.tws.2026.114735

Yi Xiang , Wenjun Ni , Yu Shi , Xinmei Yao , Jun Yang , Jiang Du

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引用次数: 0

Abstract

To improve the lateral resistance and seismic resilience of cold-formed steel (CFS) structures, a novel prefabricated CFS frame with double-layer X-shaped braced shear panels (CFS-DXBP) is proposed. Quasi-static tests were conducted on two full-scale specimens to investigate their failure mechanisms, shear strength, lateral stiffness, energy dissipation capacity, and ductility, with particular emphasis on evaluating the influence of magnesium crystal board (MCB) sheathing on these performance metrics. Particular attention was also paid to the shear deformation behavior of the double-layer bracing system and the distribution of lateral loads among the primary lateral-resisting members, with the objective of evaluating the structural synergy. Based on the test results, skeleton curve and hysteretic models were developed to characterize the mechanical behavior of the structure. Furthermore, theoretical analyses were conducted to predict the peak load-carrying capacity of both sheathed and unsheathed configurations. The experimental results demonstrate that the proposed structure exhibits significantly enhanced shear strength and energy dissipation capacity compared to conventional CFS shear walls. In addition, although the presence of MCB does not alter the ultimate failure mode, it significantly improves the load-carrying capacity and ductility of the structure, and reduces the structural energy dissipation capacity.

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双层x形支撑剪力板冷弯钢框架的抗震性能

为了提高冷弯型钢（CFS）结构的抗侧移能力和抗震能力，提出了一种新型的双层x形支撑剪力板预制框架（CFS- dxbp）。在两个全尺寸试件上进行了准静态试验，研究了它们的破坏机制、抗剪强度、侧移刚度、耗能能力和延性，特别强调了镁晶板（MCB）护套对这些性能指标的影响。特别关注了双层支撑体系的剪切变形行为和主要抗侧构件之间的横向荷载分布，目的是评估结构协同作用。基于试验结果，建立了骨架曲线和滞回模型来表征结构的力学行为。此外，还进行了理论分析，预测了护套和非护套结构的峰值承载能力。试验结果表明，与传统的CFS剪力墙相比，该结构具有显著提高的抗剪强度和耗能能力。此外，MCB的存在虽然没有改变结构的极限破坏模式，但却显著提高了结构的承载能力和延性，降低了结构的耗能能力。

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.