Analytical model for cyclic behavior of cold-formed steel bolted connection frames considering local buckling

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-11-22 DOI:10.1016/j.tws.2024.112707

Seungwook Seok , TaeSoo Kim

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引用次数: 0

Abstract

Cold-formed steel (CFS) structures are increasingly popular in the construction industry due to their high strength-to-weight ratio, ease of fabrication, and cost-effectiveness. This study focuses on the development of a detailed mathematical model to accurately simulate the cyclic behavior of CFS moment-resisting bolted connection frames, particularly considering the local buckling of connected frames. Bolted joints are preferred in thin-walled CFS structures over welded joints due to their ease of installation and adaptability in seismic design, relying on slip and bearing mechanisms of bolts to accommodate inelastic deformations and dissipate energy during seismic events. The proposed model incorporates these mechanisms and validates them against experimental data and refined finite element analyses. Significant findings highlight the importance of the balanced number and arrangement of bolts in preventing excessive bolt slip and premature buckling. This research provides a robust analytical tool for optimizing bolted joint designs in CFS bolted connection frames, contributing to safer and more resilient CFS structures in seismic regions. The model’s computational efficiency further enhances its practicality for engineers and researchers.

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考虑局部屈曲的冷弯型钢螺栓连接框架循环性能分析模型

冷弯型钢（CFS）结构由于其高强度重量比、易于制造和成本效益在建筑行业中越来越受欢迎。本研究的重点是建立一个详细的数学模型，以准确地模拟CFS抗弯矩螺栓连接框架的循环行为，特别是考虑连接框架的局部屈曲。在薄壁CFS结构中，螺栓连接比焊接连接更受青睐，因为螺栓连接易于安装，抗震设计适应性强，依靠螺栓的滑移和承载机制来适应非弹性变形，并在地震事件中耗散能量。提出的模型结合了这些机制，并通过实验数据和精细的有限元分析对它们进行了验证。重要的研究结果强调了平衡螺栓数量和排列对于防止螺栓过度滑移和过早屈曲的重要性。该研究为优化CFS螺栓连接框架的螺栓连接设计提供了强大的分析工具，有助于提高震区CFS结构的安全性和弹性。该模型的计算效率进一步提高了其对工程和研究人员的实用性。

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.