Preliminary results of the shake-table testing for the development of a diaphragm seismic design methodology

Testing provided a landmark opportunity to analyze a structure of this type under realistic boundary conditions. The unique research opportunity of testing a complete, largescale structural system was exploited to the fullest extent by subjecting the structure to 16 significant-input ground motions while 640 sensors dynamically recorded the development of a number of damage-limit states in various elements and connections in the structure. This allowed the project team to investigate the magnitude of floor diaphragm forces, load paths, and connection behavior in the precast concrete building subjected to seismic loading.