Theoretical and FEA study on shear performance of novel shear connectors

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2024-11-28 DOI:10.1016/j.jcsr.2024.109186

Quansheng Yan, Xingyu Chen, Buyu Jia, Xiaolin Yu, Yang Zheng, Zhiyuan Chen

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引用次数: 0

Abstract

Shear connectors are essential components for force transfer in composite beams. Compared to conventional welded-bolt connectors, bolted shear connectors offer the advantage of easy removal. However, traditional bolted connectors for steel-concrete composite beams feature threads on the contact surface, reducing the shear cross-sectional area of the bolts. To address this limitation, this paper proposes a novel type of friction-clamping bolt connector, referred to as Connecting Lock Combination Bolts (CLCB¹). The finite element software ABAQUS was used to develop an analytical model for the CLCB, and a comparative analysis was conducted with traditional connectors. The static performance of the new shear connectors was evaluated, and a shear load capacity formula applicable to CLCB connectors was derived. Additionally, linear and exponential functions were employed to fit the load-slip curve of the CLCB connectors. The results indicate that the shear load capacity of CLCB connectors exceeds that of conventional bolted connectors. Moreover, the bolt diameter and concrete strength are the primary factors influencing the ultimate shear load capacity and stiffness of CLCB connectors. The preload on the bolts enhances the shear stiffness, while parameters such as bolt hole clearance, the height of the lower nutted rod, and the clearance between the upper and lower bolt rods are crucial in ensuring the proper functioning of CLCB connectors. Furthermore, the shear capacity formula provides an accurate prediction of CLCB connector performance with an error margin of less than 6 %, and the load-slip curve model effectively illustrates the load-slip relationship under shear.

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新型剪力连接件抗剪性能的理论与有限元研究

剪力连接件是组合梁受力传递的重要部件。与传统的焊接螺栓连接器相比，螺栓剪切连接器具有易于拆卸的优点。然而，传统的钢-混凝土组合梁螺栓连接件在接触面上设有螺纹，减小了螺栓的剪切截面积。为了解决这一限制，本文提出了一种新型的摩擦夹紧螺栓连接器，称为连接锁组合螺栓（CLCB1）。利用有限元软件ABAQUS建立了CLCB的解析模型，并与传统连接器进行了对比分析。对新型抗剪连接件的静力性能进行了评价，并推导出适用于CLCB连接件的抗剪承载力公式。此外，采用线性函数和指数函数拟合了CLCB连接器的载荷-滑移曲线。结果表明，CLCB连接件的抗剪承载力优于常规螺栓连接件。螺栓直径和混凝土强度是影响CLCB连接件极限抗剪承载力和刚度的主要因素。螺栓上的预紧力提高了抗剪刚度，而螺栓孔间隙、下螺帽杆高度、上、下螺帽杆间隙等参数是保证CLCB连接件正常工作的关键。抗剪承载力公式能较准确地预测CLCB接头的性能，误差小于6%，荷载-滑移曲线模型能较好地反映剪切作用下的荷载-滑移关系。

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

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.