NEHRP Clearinghouse

Title
Seismic Isolation of Multi-Story Frame Structures Using Spherical Sliding Isolation Systems.
File
PB94193745.pdf
Author(s)
Al-Hussaini, T. M.; Zayas, V. A.; Constantinou, M. C.
Source
National Center for Earthquake Engineering Research, Buffalo, NY.; National Science Foundation, Arlington, VA.; New York State Science and Technology Foundation, Albany., March 17, 1994, 176 p.
Abstract
Experimental and analytical results are presented from shake table tests conducted on six and seven story framed building models. The models are seismically isolated using a spherical sliding isolation system, known as Friction Pendulum System (FPS). The models include moment and braced frames, with different isolator installation configurations, including isolators installed directly at the bases of the first story columns, and isolators installed below a rigid diaphragm base. In all cases, the isolators reduce structure shear forces and inter story drifts in the multi-story building models by factors of 4 to 6, allowing the upper structural system to remain elastic during severe earthquake loadings.
Keywords
; Buildings; Tests; Earthquake engineering; Vibration isolators; Fatigue (Materials); Seismic design; Shakers; Framed structures; Shear stress