节点5_Quasi-Static Strengths and Failure Modes of Tight-Fitting.pdfVIP

Quasi-Static Strengths and Failure Modes of Tight-Fitting and Round-End Metal-Plate Wooden Truss Joints 1 2 3 N. Dadhiala ; K. Koo ; and J. K. Spelt Abstract: An experimental study was conducted to investigate whether existing industry design procedures for tight-fitting metal plate . connector truss joints can be applied to the design of joints made with round-end webs. Four joint configurations were tested with a range d e of connector-plate sizes: 45° with web in tension, 45–45° with one web in compression and the other in tension, 45–90° with the 45° web v r e s in compression and the 90° web in tension, and 45° with the web under compression. In total, 87 tight-fitting and 171 round-end joints e r s t were tested. As expected the tight-fitting joints were stronger and stiffer than round-end joints. Both the shear strength of the metal plate h g i connector and the teeth pullout strength were smaller in the round-end joints than in the tight-fitting joints. The line contacts between the r l l a ; round-end webs in compression produced greater crushing of the wood, causing buckling of the connector plates, and reducing the y l ultimate loads on these joints. Design guidelines are suggested for round-end joints. n o e s u DOI: 10.1061/ASCE0733-94452008134:61046 l a n o s r CE Database subject headings: Joints; Connections; Trusses; Wooden structures; Timber construction; Plates. e p r o F . E Introduction “National Design Standard for Metal Plate Connected Wood