TY  - EJOU
AU  - Yang, Huifeng 
AU  - Wu, Mingwang 
AU  - Gu, Rixin 
AU  - Cao, Hang 
AU  - Xiao, Kai 
AU  - Shi, Benkai 

TI  - Experimental Investigation on the Strength and Ductility Performance of SteelTimber-Steel Joints with Screw and Steel-Tube Fasteners
T2  - Journal of Renewable Materials

PY  - 2023
VL  - 11
IS  - 12
SN  - 2164-6341

AB  - This article presents experimental results of steel-timber-steel (STS) joints loaded parallel to grain. Eight groups of
specimens were designed, and tensile tests were performed. The fastener types and fastener numbers were considered to evaluate the tensile strengths and ductility performances of the STS joints. The screws with 6 mm diameter and the innovative steel-tubes with 18 mm diameter were adopted as connecting fasteners. The
experimental results were discussed in terms of yielding and ultimate strengths, slip stiffness, and ductility factors.
The ductility classification and failure mechanisms of each group of specimens were analyzed. It was demonstrated that the STS joint with large diameter steel-tubes showed acceptable ductility, which was close to the ductility of the STS joint with small diameter screws, thanks to the hollow structure of the steel-tube. The theoretical
strengths of various failure modes for the joints with small diameter screws or large diameter steel-tubes were
calculated and compared with the experimental results. The ductile performance of the STS joint was discussed
by comparing the theoretical strengths of various failure modes. The effective number of the STS joint with multifasteners was also analyzed by considering the failure mechanisms in aspects of tensile strength and slip stiffness.
KW  - Steel-timber-steel joint; screw; steel-tube; ductility; experimental investigation; timber structure

DO  - 10.32604/jrm.2023.028507