Full Session with Abstracts
Limited information is currently available for engineers to design cross-laminated timber (CLT) floor diaphragms to resist lateral forces. For US practice, limited design guidelines and no building code specifications have yet been developed for seismic design of CLT floor diaphragms.
This presentation will summarize the state-of-the-art testing that has been performed on the topic, and describe a design procedure for CLT and CLT-concrete composite floor diaphragms. An example case study of a two-story mass timber building that was constructuted and tested on the UC San Diego shake-table is provided. The roof of the two-story building consisted of a CLT-concrete composite floor recently tested at Oregon State University in collaboration with industry partners, while the first floor level consisted of a CLT only diaphragm, typical of what is being proposed for many mass timber buildings currenlty being built in the US. Both floors included plywood spline connections between the CLT panels. The structure was subjected to large earthquake ground motions and the behavior and performance of the diaphragms was measured and characterized. Results from these tests will contribute to development of design guidelines for CLT diaphragms.