Abstract
In the last two decades, high-rise timber buildings have been built using the glulam truss system, even with limited openings. Moment-resisting timber frames (MRTF) with semi-rigid beam-to-column connections can be an architecture-friendly way to provide a load-carrying system to vertical and horizontal loads for timber buildings. In these structures, connections of adequate ductility are crucial to ensure robustness and energy dissipation. This paper presents a review of the main types of timber beam–column moment connections with improved ductility and proposes to carry out a ductility assessment of these connections based on the most relevant ductility factors. Joints have a significant influence on the global performance of MRTF, and the application of ductile connections have improved the mechanical parameters of the timber frame. The reinforced bolted slotted-in steel plate and glued-in rods connections have similar mechanical performance, with high rotation capacity and good ultimate moment, but exhibited different failure modes under cyclic loading. The connections were classified within ductility classes. In general, the glued-in steel rods presented better results because of the high influence of steel profiles in the connection yielding. Despite the excellent mechanical behavior, the reinforced bolted slotted-in steel plate connections presented medium ductility values.
Highlights
Timber is a natural and renewable resource that can have high level of prefabrication; it is quick to assemble and presents a high strength-to-mass ratio favorable for building in seismic areas
There is little research that applied this connection to a moment–rotation heavy timber structure, as presented in Table 6, this connection has demonstrated a good level of rotation capacity
This paper presents a review of the most important research studies that have focused on ductile beam-to-column connections in the moment-resisting timber frame system
Summary
Timber is a natural and renewable resource that can have high level of prefabrication; it is quick to assemble and presents a high strength-to-mass ratio favorable for building in seismic areas Those are the main reasons that motivated the interest in multi-story timber structures. In the last two decades, high-rise timber buildings have been built using the glulam truss structural system, where the massive diagonal elements are connected by multiple slotted-in steel plates and dowel joints to ensure structural robustness [1]. This system restrains several architectural possibilities—namely, it limits large openings. In these statically indeterminate structures, a plastic design of connections in order to obtain a ductile behavior is essential and can lead to material savings and more safety reserve
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