Abstract
In recent years, hybrid steel-timber structures are seeing an increasing use in modern building construction at a competitive price. Cross-laminated timber (CLT) is a prefabricated multi-layer engineered panel wood product, manufactured by gluing layers of solid-sawn lumber at perpendicular angles. Their orientation results in excellent structural rigidity in both orthogonal directions. CLT construction materials are used not only for flooring systems and roof assemblies, but CLT infill shear walls are also gaining a lot of interest as a promising alternative for sustainable primary lateral load resistance systems. This paper extends the current research background on hybrid steel-timber structures. To achieve that, this work is conducted in such way as to explore the potentiality of incorporating CLT infill shear walls within steel framed structures with semi-rigid connections (STSW). In particular, a three-dimensional finite element model using the general-purpose finite ele-ment program ANSYS is generated herein to study the mechanical behaviour of a single-bay, two storey STSW system with semi-rigid connections. Analytical results show that the presence of CLT infill shear walls can significantly improve the performance of moment-resisting frame systems, for multi-storey buildings. Moreover, it is observed from the extended parametrical study that the STSW systems show better performance when an appropriate plastic moment ratio index is defined.
Highlights
Encompassing the beneficial properties of steel frames and Cross-laminated timber (CLT) shear walls, new innovative hybrid techniques can be developed for economical lateral load resisting systems
This work is based on the numerical models developed to predict the nonlinear behaviour of composite steel-concrete structural systems consisted of steel frames with semi-rigid connections and reinforced concrete infill walls by Vogiatzis and Avdelas [5], [6], [7], and the experimental work conducted by Tong and his co-workers [8], [9]
The main objective of this study is to investigate any advantage on using different steel quality for the horizontal boundary elements (HBEs) and the vertical boundary elements (VBEs)
Summary
Encompassing the beneficial properties of steel frames and Cross-laminated timber (CLT) shear walls, new innovative hybrid techniques can be developed for economical lateral load resisting systems. The steel frame with CLT infill shear walls and semi-rigid connections, namely STSW, (Figure 1), could provide a promising solution for new buildings with sustainable design considerations. Due to its advantages and the high level of prefabrication, CLT becomes a preferred and competitive construction material for modern buildings with sustainable design. Limited studies have been reported on steel framed structures with CLT shear walls in recent decades. The available research focuses on the mechanical behaviour of CLT panels using experimental tests. Analytical studies are an effective means to study the threedimensional behaviour of those systems [3], [4], the available research within the international literature is scarce. STSW finite element (FE) modelling is considered a challenging task due to the high level of indeterminacies involved
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