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Analytical Investigation into the Rotational Performance of Glulam Bolted Beam-Column Connections under Coupled Bending Moment and Shear Force

Xiaofeng Zhang1, Lisheng Luo2,*, Youfu Sun1, Xinyue Cui2, Yongqiang Zhang2
1 Department of Wooden Structure Construction, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, China
2 Department of Civil Engineering, College of Civil Engineering and Architecture, Hainan University, Haikou, China
* Corresponding Author: Lisheng Luo. Email: luolisheng2015@hainanu.edu.cn
(This article belongs to this Special Issue: Advanced Wood Composites from Renewable Materials)

Journal of Renewable Materials https://doi.org/10.32604/jrm.2022.023651

Received 07 May 2022; Accepted 19 July 2022; Published online 13 September 2022

Abstract

Considering the glulam beam-column connection form and the number of bolts, monotonic loading test and finite element analysis was carried out on 9 connection specimens in 3 groups to study the rotational performance and failure mode of the connection. The test results revealed that compared with U-shaped connectors, T-shaped connectors can effectively improve the ductility of connections, and the increase in the number of bolts can reduce the initial stiffness and ductility of connections. By theoretical analysis, formulas for calculating the initial stiffness and ultimate moment of connections were deduced. Subsequently, the moment-rotation theoretical model of connections was established based on the formulas, which were validated according to the test data and simulation results. The proposed model can not only improve the current theoretical system of heavy-duty glulam beam-column structure but also provide a theoretical basis for calculating the mechanical properties of the glulam beam-column connection.

Keywords

Beam-column connection; mechanical properties; stiffness; ultimate moment
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