Investigation on shear behavior of longitudinal-plate shear connector in concrete-filled steel tube

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-19 DOI:10.1016/j.tws.2026.114672

Yaojun Zhang , Dan Gan , Jian Jiao , Zhuocheng Tang , Yifeng Liu

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引用次数: 0

Abstract

In concrete-filled steel tubular (CFST) structures, the natural bond strength is often insufficient to transfer forces between the steel hollow section and the infilled concrete. This study proposed a novel longitudinal-plate shear connector to enhance the interface shear resistance of CFST columns. A total of eight CFST specimens with longitudinal-plate shear connectors and a benchmark specimen were designed and subjected to push-out tests. The test variables included the number of shear connectors, shear connector details (e.g., thickness, width, the existence of openings in the shear connector, and the hole diameter of the openings), and boundary conditions of the longitudinal-plate shear connectors. The experimental results demonstrated that longitudinal-plate shear connectors increased shear capacity by up to 725 % compared to the benchmark specimen. Based on the test results, a verified finite element model was developed on the basis of the dynamic implicit solver to conduct a detailed parametric study. Finally, the failure modes of the longitudinal-plate shear connector were analyzed in detail, and corresponding formulas for predicting the shear capacity of longitudinal-plate shear connection were proposed.

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钢管混凝土纵板剪力连接件抗剪性能研究

在钢管混凝土（CFST）结构中，自然粘结强度往往不足以在钢空心截面和填充混凝土之间传递力。为了提高钢管混凝土柱的界面抗剪能力，提出了一种新型的纵板剪力连接件。设计了8个纵板剪力连接钢管混凝土试件和1个基准试件，并进行了推拔试验。试验变量包括剪切连接件的数量、剪切连接件的细节（如厚度、宽度、剪切连接件上是否有孔洞、孔洞的孔径）以及纵板剪切连接件的边界条件。试验结果表明，与基准试件相比，纵板剪力连接件的抗剪能力提高了725%。根据试验结果，建立了基于动态隐式求解器的验证有限元模型，进行了详细的参数化研究。最后，对纵板剪力连接件的破坏模式进行了详细分析，并提出了相应的纵板剪力连接件抗剪承载力预测公式。

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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.