Abstract
AbstractIn this paper, results are presented from a testing program focused on evaluating the performance of portal frame systems. A total of nine full-scale portal frame assemblies with six different configurations were tested under monotonic and reversed cyclic loading. The portal frames were 3.66 m in length and 2.44 m in height, with a 406-mm wall segment at each end of the portal frame. From the experimental results, it was observed that the corner joint between the header and narrow braced wall segment governs the lateral load-carrying capacity and ultimate displacement of the portal frame. Installation of metal straps considerably increased the lateral load-carrying capacity of the portal frame assemblies. Straps placed directly on the lumber framing showed increased resistance compared to those installed on the oriented strand board. Portal frames with hold-downs had a greater lateral load-carrying capacity those without hold-downs. A comparison was made between portal frames and conventional brac...
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