Assessment of Vibrations from a Seismic Test Facility

The recent earthquakes in Christchurch led to the redevelopment of the University of Canterbury’s Seismic Equipment Laboratory (SEL). The SEL facility will involve the testing of building structures subject to simulated static and dynamic displacements from earthquakes, with a reaction wall and floor used to exert loads by way of hydraulic actuators on test specimens, and shaker tables used to test built forms separately or in combination. These tests can generate significant ground vibration, which has the potential to affect the use of nearby buildings housing sensitive equipment. This paper will outline measurements and analysis carried out to predict the likely vibration levels at the footings and within adjoining buildings. It also outlines methods to mitigate vibration in excess of relevant criteria.