单调荷载作用下不同剪切角下CFS剪力墙板螺纹连接试验研究

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-31 DOI:10.1016/j.tws.2025.113251

V.Y. Palagala, M. Nithyadharan

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引用次数: 0

摘要

冷弯型钢（CFS）剪力墙板的非线性性能主要由连接CFS框架和护套的螺钉的性能决定。墙板上的螺丝与护套的自由边缘平行或以斜角承受剪切。然而，现有的研究描述了螺旋连接在剪切作用下的行为，无论是平行的还是垂直于护套自由边缘的，都不能真实地捕捉到不同角度下螺旋连接在剪切作用下的行为。因此，本研究提出了一种新的实验测试设置，以表征CFS构件与硅酸钙板之间的螺钉连接行为，其中螺钉在不同角度（平行，垂直和倾斜）经历剪切。试验程序包括160个螺纹连接试件在单调荷载下的试验。试验矩阵的可变性包括：a)不同剪切角度（0°、22.5°、45°、67.5°和90°）下的螺钉，b)不同板厚（10 mm和12 mm）和距护套自由边缘的边缘距离（10 mm和25 mm）， c)板的方向（纵向和横向），d)单调拉伸和压缩载荷下的螺钉。结果表明，剪切加载角度和边缘距离是影响螺栓连接在拉伸加载下的荷载-位移响应的关键参数。利用试验数据建立了考虑不同剪切角度的极限抗剪强度设计方程。

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Experimental studies on screw connections in CFS shear wall panels subjected to different angles of shear under monotonic loading

The nonlinear behaviour of cold-formed steel (CFS) shear wall panels is primarily governed by the behaviour of the screws connecting the CFS framing and sheathing. The screws in the wall panel experience shear either parallel or at oblique angles with reference to the free edge of the sheathing. However, existing studies characterise the screw connection behaviour subjected to shear, either parallel or perpendicular to the free edge of the sheathing, which fails to realistically capture the behaviour of screw connections subjected to shear at different angles. Hence, this study proposes a novel experimental test setup to characterise the screw connection behaviour between CFS member and calcium silicate board where the screws experiences shear at different angles (parallel, perpendicular and oblique). The experimental program consists of 160 screw connection specimens tested under monotonic loading. The variability in the test matrix includes a) screws subjected to different angles of shear (0°, 22.5°, 45°, 67.5° and 90°), b) different board thicknesses (10 mm and 12 mm) and edge distances (10 mm and 25 mm) from the free edge of the sheathing, c) orientation of board (longitudinal and transverse directions), and d) under monotonic tension and compression loading. The results show that the angle of shear loading, and edge distance are the critical parameters that influence the load-displacement response of the screw connection under tensile loading. Further, the test data was used to develop design equations to predict the ultimate shear strength considering different angles of shear.

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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.