An innovative floor anchorage system is being developed through a multi-university NSF/NEES research project. The system, involving a ductile anchorage connector between the lateral force resisting system (LFRS) and the floor diaphragm, reduces inertial forces during major earthquakes. The system permits relative motion of the floor between the primary (vertical) elements of the LFRS and the gravity load resisting system at a predefined diaphragm force cut-off level. The system has the potential to reduce floor accelerations and inertial forces, thereby reducing the seismic demand on the LFRS. This paper presents the initial analytical studies and experimental work toward developing prototype configurations for the floor anchorage isolation system. The analytical studies identified the relationship between reduction in seismic demands and the amount of relative displacement between the LFRS and the floor diaphragm. This relative displacement is limited within practical limits to prevent too large of an increase in gravity column inter-story drifts. The product of these studies is a feasible design space and configuration for the anchorage system that optimizes the competing requirements of reducing structure seismic response while limiting relative displacement between the LFRS and the floor diaphragm. These optimized designs and configurations are being validated using physical experiments including large scale component tests at NEES@Lehigh and shake table testing at NEES@UCSD.
|Publication status||Published - Jan 1 2014|
|Event||10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014 - Anchorage, United States|
Duration: Jul 21 2014 → Jul 25 2014
|Other||10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014|
|Period||7/21/14 → 7/25/14|
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology