Understanding In-Line Connections Behavior from Experimental and Numerical Analyses on Rectangular and Circular Hollow Section Elements

Calin-Ioan Birdean, Ioan Both (), Ioan Mărginean and Anghel Cernescu
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Calin-Ioan Birdean: Department of Mechanics and Strength of Materials, Politehnica University of Timisoara, 300222 Timisoara, Romania
Ioan Both: Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara, 300224 Timisoara, Romania
Ioan Mărginean: Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara, 300224 Timisoara, Romania
Anghel Cernescu: Department of Mechanics and Strength of Materials, Politehnica University of Timisoara, 300222 Timisoara, Romania

Mathematics, 2023, vol. 11, issue 15, 1-16

Abstract: Depending on the connection type, especially semi-rigid connections, the analyses of building structures offer accurate results function of the rigidity and ductility. The present paper analyzes the in-line connection of rectangular and circular hollow sections, categorized as semi-rigid connections, suitable for an architectural design of invisible joints. For such connection the standards do not cover an explicit design method. Experimental bending tests were performed on rectangular and circular hollow sections having the end plate fixed inside the profile and bolted by four and one high-strength bolts, respectively. The joint separation represents a serviceability criterion which was monitored using digital image correlation technique. Based on experimental results, a numerical model was validated using the finite element method. After the validation of the numerical model based on the experimental results, a parametric investigation was conducted to study the influence of the access hole, the preload level, the end plate thickness, and the axial force. The results show the small influence of the bolt preload, but the end plate thickness was of major importance. A reduction of the assembly rigidity was also caused by the manhole. The study shows the feasibility of the connection configuration with the end plate positioned inside the hollow profile.

Keywords: in-line connection; experimental test; finite element analyses; joint separation; parametric study (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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