Investigation of Thermal Effects on Nailed Connection of Mass Ply Panels

Abstract Mass ply panels (MPP), a relatively new mass timber product, has been utilized in several construction projects as diaphragm and wall panels. Connection for MPP is crucial structural component that requires better understanding. This article presents an experimental investigation into elevated temperature exposure–driven property degradation of nailed connections, which important both the design structures terms fire resistance rehabilitation partially damaged by fire. One control group 32 exposure groups, were combinations eight temperatures four durations, investigated. The failure modes yield strength connection analyzed function time compared with prediction from National Design Specification existing literature. results show decrease up to 45 percent initial stiffness ultimate load; meanwhile, there was no statistical evidence change load majority testing groups. Two analytical models, namely, multilinear regression first-order kinetics model, proposed model strength. provided suggested nail degraded over at rates depending on temperature.