Vol. 20, No. 3, pp. 241-252 (2024)
RESEARCH ON BENDING PERFORMANCE AND BILINEAR MODEL OF
AN IMPROVED BOLT-COLUMN (BC) JOINT
Zhi-Cheng Xiao, Ren Li, Hui-Jun Li *, Guang-Hong Luo and Bao-Hui Li
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 13 January 2024; Revised:18 February 2024; Accepted: 20 February 2024
DOI:10.18057/IJASC.2024.20.3.4
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ABSTRACT
The semi-rigid bolt-column (BC) joint, which is a component of large-span single-layer reticulated structures, demonstrates a considerable application potential. In this study, the BC joint is innovatively modified using two flanges, one web and two additional high-strength bolts. The comparative analysis between the original and improved joints reveals a notable enhancement in bending performance, including 62.59% increase in initial rotational stiffness, 116.82% increase in initial yield moment, and 87.57% increase in ultimate moment. Subsequently, a total of 66 finite element (FE) models of the improved BC joint, incorporating varying parameters such as bolt diameter, bolts' vertical distance, flange thickness, front plate thickness, and column node thickness, are conducted to systematically evaluate its bending performance. Furthermore, the effect of axial force on the bending performance is discussed. Finally, a bilinear model is developed to predict the moment-rotation relationships of improved BC joint.
KEYWORDS
Improved BC joint, Parametric analysis, Bending performance, Failure mode, Bilinear model
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