Experimental and theoretical study on a new type of non-embedded T-bolt shear connector in composite beams

被引：0

作者：

Li, Wei ^{[1
,2
]}

Fan, Haitao ^{[1
]}

Kong, Zhengyi ^{[3
]}

Xiong, Jingang ^{[4
]}

Vasdravellis, George ^{[3
]}

Liu, Jicheng ^{[1
,2
]}

机构：

[1] Wenzhou Univ, Coll Civil Engn & Architecture, Wenzhou 325035, Peoples R China

[2] Soft Soil Fdn & Tideland Reclamat Zhejiang Prov, Key Lab Engn & Technol, Wenzhou 325035, Peoples R China

[3] Heriot Watt Univ, Inst Sustainable Built Environm, Edinburgh EH14 4AS, Scotland

[4] Nanchang Univ, Sch Infrastruct Engn, Nanchang 330031, Peoples R China

来源：

STRUCTURES | 2024年 / 69卷

基金：

中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

Push-out test; Shear connectors; Shear capacity; Detachability and reusability; Design guidance; BEHAVIOR; GIRDERS;

D O I：

10.1016/j.istruc.2024.107497

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Current demountable shear connectors predominantly use bolted connections through beam flange drilling, a technique that may present challenges in material recyclability after the service life of a building. This study introduces a novel non-embedded T-bolt shear connector, which incorporates an end plate positioned within a channel embedded in the concrete slab, clamping the flange of the steel beam and the channel together. The interaction utilizes serration teeth against the steel beam to enhance the shear resistance through friction. To evaluate the shear performance, nine push-out specimens were conducted, focusing on variables such as the strength of concrete, the dimension of bridge gasket and the diameter of bolt, and channel spacing. The load-slip curves and failure modes were analyzed, and the demountability of connectors at different loading stages was assessed. The results show that under normal usage and at ultimate load capacity, both the bolt and concrete slab remained elastic, with minimal strength reduction observed during subsequent load applications. A new formula for calculating the shear resistance of the T-bolt shear connector is proposed, providing a theoretical foundation for further development of dismountable shear connectors in construction applications.

引用

页数：17