Abstract
Dowel-type connections are the most common connections in glulam structures. Bolts are often used as fasteners for dowel-type connections. However, the clearance between the bolts and the pre-drilled bolt holes leads to low rotational stiffness and insufficient moment-resisting capacity. To achieve better mechanical performance, screws can be used as alternative fasteners for dowel-type connections. In this paper, monotonic and cyclic loading tests were conducted on glulam dowel-type connections with either bolts or screws as fasteners. The failure modes, moment-resisting capacity, ductility ratio, stiffness degradation, and equivalent viscous damping ratio of the specimens were analyzed and reported. Results showed that compared with traditional bolted connections, the screwed connections had larger moment-resisting capacity and better ductility. The hysteretic loops of the screwed connections were plumper, and the pinching effect was gentler compared to those of traditional bolted connections.
Highlights
Dowel-type connections are the most commonly used connections in glulam structures
The moment–rotation curves are depicted in Fig. 6 through the data recorded by the loading equipment and the linear voltage displacement transducers (LVDTs)
Monotonic and cyclic loading experiments were carried out to study the mechanical performance of this kind of connection and its load-resisting properties were further compared with traditional bolted connections
Summary
Dowel-type connections are the most commonly used connections in glulam structures. The mechanical performance of dowel-type connections plays a significant role for the load-resisting performance of the structure. To investigate the mechanical performance of this kind of screwed connection and compare its behavior with traditional bolted connections, monotonic and cyclic loading tests were conducted. The CSC specimen is composed of a π-shaped steel and the glulam beam which is connected with the clamps of the π-shaped steel with coach screws.
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