Shake Table Testing of a Full-Scale Five-Story Building: Performance of the Major Nonstructural Components - Egress and Façades

Abstract

A full-scale five-story building was constructed on the NEES@UCSD large high performance shake table and subjected to a series of earthquake motions, while supported at its base in two different configurations. The building was completely furnished with nonstructural components and systems (NCSs) including a functioning passenger elevator, prefabricated stairs, façades, partition walls, piping, HVAC, ceiling, sprinklers, building contents, as well as passive and active fire systems. The program included testing the building in a base-isolated configuration prior to testing it fixed at its base, with earthquakes of increasing severity imposed on the building in both configurations. In this paper, the performance of two major NCSs is of primary interest, namely the egress subsystems (elevator and stairs) and façades (balloon framing overlaid by stucco and precast concrete cladding). Physical observations and measured seismic response of these subsystems and the associated impact on postearthquake fire performance are presented.

Effects of Equipment-Structure-Soil Interaction on Seismic Response of Equipment and Structure via Real-Time Dynamic Substructuring Shaking Table Testing

“…Recent research has shown that disregard of equipmentstructure interaction in some situations has an adverse impact on the seismic design of structures and equipment [1,2]. Most studies of the ES subsystem were based on the rigid foundation assumption with no account taken of the soil effect, which is at odds with engineering reality and impairs the seismic performance research validity.…”

“…The modal transformation matrix for the soil model, Φ , was determined by the above method. Then the calculation matrices for the reduced soil FEM were determined using (2).…”

Substructure shake table test for equipment‐adjacent structure–soil interaction based on the branch mode method

“…Among various experimental studies, a shake table test for a prototype of five‐layer frame structure was performed, which was equipped with a large amount of nonstructural components such as stairs, elevators, and pipelines. The seismic response of structural and nonstructural components was under fixed support and insulation support, respectively . Another shake table test for a two‐layer transformer station with electrical installations was performed and the effect of equipment‐structure interactions on the seismic response of the system was analyzed …”

“…The seismic response of structural and nonstructural components was under fixed support and insulation support, respectively. [5] Another shake table test for a two-layer transformer station with electrical installations was performed and the effect of equipmentstructure interactions on the seismic response of the system was analyzed. [6] All the aforementioned studies were conducted under the assumption of a rigid foundation, but without considering the effect of foundation soil on the equipment-structure system.…”

A shaking table real-time substructure experiment of an equipment–structure–soil interaction system

“…For instance, nonstructural damage accounted for 50% of economic losses of the 1994 Northridge Earthquake. Li et al 1 and Pantoli et al 2 conducted a shaking table test of equipment-structure systems to study earthquake responses of structures and equipment. Researchers observed interactions, when ignored under some conditions, may adversely impede seismic design of structures and equipment.…”