There is limited research on elevated temperature performance of CLT connections, and consequentially a lack of full understanding of the fire performance of CLT structures. Therefore, tests were conducted on a CLT wall-to-floor bracket connection assembly to characterize thermal degradation according to a matrix of 28 exposure duration-temperature combinations. The first phase of the research developed simple models to predict thermal degradation of two basic engineering parameters, peak strength and elastic stiffness. The second phase of the research used two different methods to develop force-displacement backbone models from the experimental hysteresis data. Results from both studies indicate significant thermal degradation of the connection performance at elevated temperatures. This research is a step towards holistic evaluation of elevated temperature modeling of CLT structures, and identifies a need for further research in elevated temperature performance of CLT structural systems.

Kolton Mahr was born and raised in Grants Pass, OR.  He originally came to Oregon State University to study Forestry, but also became interested in structural engineering during his undergraduate career. Researching CLT allowed him to stay involved with both forestry and structural engineering, while learning about the high performing and sustainable material that could provide a boost to the local timber industry. After graduation he plants to move to Portland to start his career at KPFF consulting engineers.