Abstract
Hybrid steel to timber connections are found in many buildings and bridges. These connections offer several advantages such as ease of construction and energy dissipation. This research paper aims to study the mechanical behaviour of bolted hybrid connections that consists of a square hollow steel column (SHS) and a glulam timber beam. The connection between the two structural members is achieved by means of angles and preloaded bolts. A reference model is constructed and verified by comparison to experimental and numerical data from the international literature. Additionally, several parameters that affect the response of the connection are modified in order to investigate and quantify their effect, resulting in seven different case studies. These parameters are the size of the bolts, the thickness of the angles and the addition of stiffener. The moment- rotation curve of each case study is constructed and the results are commented. Finally, a proposed optimal configuration of the hybrid connection is presented.
Highlights
Steel and wood are materials that have been extensively used in constructions worldwide, even from ancient times
The main results of the numerical analysis are the momentrotation curves together with the corresponding initial rotational stiffness and the von Mises stresses that develop in the connection
The numerical analysis of the hybrid steel-timber connection focuses on the initial rotational stiffness and the developing von Mises stresses in the top angle
Summary
Steel and wood are materials that have been extensively used in constructions worldwide, even from ancient times. The need for a sustainable built environment encourages structural engineers to think of new design options that can maximize the benefits of the aforementioned materials. By combining the strength and ductility of steel with the low weight of wood, environmental friendly structures are achieved. The structural members in this type of constructions are connected using hybrid solutions. In countries like Norway where the access to wood resources is easy, these hybrid structures could become the norm for future lightweight structures
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