Experimental investigations into the mechanical performance of glulam dowel-type connections with either bolts or screws as fasteners

Journal of Wood Science

Jiajia Ou¹  Wei Feng²  Zheng Li²  Feng Liang²  Minjuan He² 

[1] China Southwest Architectural Design & Res Inst C;Department of Structural Engineering, Tongji University;

关键词: Glulam;    Dowel-type connections;    Screwed connections;    Bolted connections;    Mechanical performance;   

DOI  :  10.1186/s10086-021-02002-5

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown