螺纹-铆钉混合连接CFS剪力墙抗剪强度研究

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-24 DOI:10.1016/j.tws.2025.113289

Zhiqiang Xie , Ying Fan , Zengzhi Qian , Shi Zhang , Ye Bi , Hongwei Fang , Daxing Zhou , Xiyang Lei

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引用次数: 0

摘要

大量研究表明，冷弯型钢剪力墙的抗剪性能主要受薄板和钢框架连接的影响。CFS结构的主要连接方式是自钻螺钉（SDS），其变形能力大，但强度低。自穿铆钉（SPR）可以提高CFS剪力墙的抗剪强度，但其变形能力有限。因此，本文提出了一种新型的螺纹-铆钉（SR）混合连接的CFS剪力墙，旨在通过结合两种连接类型的特性和特点来提高墙体的抗剪性能。研究了扣件布置方式对剪力墙破坏模式的影响，提出了具有较好抗剪性能的混合连接方式。试验研究表明，钢筋混凝土连接的CFS剪力墙的抗剪强度主要由板壳通过斜向张力场提供。然而，主要的破坏方式是SR连接在张力场内的破坏。鉴于此，进一步研究了SR连接的剪切性能。通过对42个试件进行两种组合形式的剪切试验，评估紧固件布置方式和数量对试件抗剪性能和破坏机制的影响。提出了一种基于群效应的钢筋混凝土连接抗剪强度计算方法。在此基础上，提出了一种结合有效条法计算钢筋混凝土连接CFS剪力墙抗剪强度的方法。结果表明：SR连接的主要失效模式是螺杆倾斜和铆钉尾从下片拔出，以及上片的轴承失效。板料厚度组合是影响破坏模式的主要因素。考虑群效应意味着SR连接抗剪强度的计算方法是非常准确的。由此可见，与SDS连接剪力墙和SPR连接剪力墙相比，SR连接能有效提高CFS剪力墙的抗剪强度和变形。连续加螺杆的剪力墙抗剪性能较好。本文提出的钢筋混凝土连接CFS剪力墙抗剪强度计算方法精度较高，误差为5%。给出了一个设计实例来说明这一点。

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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Shear strength of CFS shear walls with screw-rivet hybrid connections

Numerous studies have demonstrated that the shear performance of cold-formed steel (CFS) shear walls is primarily influenced by the connection between the sheet sheathing and steel frame. The main connection type in CFS structures is self-drilling screws (SDS), which have high deformation capacity but low strength. Self-piercing rivets (SPR) have been found to improve the shear strength of CFS shear walls, but their deformation capacity is limited. Therefore, this paper presents a novel CFS shear wall with screw-rivet (SR) hybrid connections designed to enhance the shear performance of the wall by incorporating the properties and characteristics of both connection types. The influence of fastener arrangement on failure modes of the shear wall was studied and a hybrid connection type with better shear performance was proposed. Experimental investigation revealed that the shear strength of CFS shear walls with SR connections was primarily provided by the sheet sheathing through the diagonal tension field. However, the main failure mode was the failure of SR connections within the tension field. In view of this, the shear behaviour of SR connections was studied further. Shear tests were conducted on total of 42 specimens with two types of sheet combinations to assess the effects of fastener arrangement and number on shear performance and failure mechanisms. A calculation method based on the Group Effect was proposed for determining the shear strength of SR connections. Based on this, a calculation method for the shear strength of a CFS shear wall with SR connections combined with the effective strip method was proposed. The results indicated that the primary failure modes of SR connections were a combination of screw tilting and the rivet tail being pulled out from the lower sheet, and the bearing failure of the upper sheet. The sheet thickness combination was the main factor affecting the failure mode. Considering the Group Effect meant that the calculation method for the shear strength of SR connections was extremely accurate. Thus, SR connections can effectively improve the shear strength and deformation of a CFS shear wall compared to both a shear wall with SDS and a shear wall connected by SPR. The superior shear performance was observed in a shear wall in which screws were added continuously. The proposed calculation method for the shear strength of a CFS shear wall with SR connections was highly accurate, with an error of <5 %. A design example is presented to illustrate this.

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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.