Damage to devices installed in electric substations, which have shown vulnerable behaviour under strong earthquakes the last decades, may endanger power delivery emergency phases during and after an earthquake. Within seismic risk assessment of networks, definition fragility functions equipment is paramount. However, current literature availability such models for some specific substation compo...

Bridges are a part of vital infrastructure, which should operate even after disaster to keep emergency services running. There have been numerous bridge failures during major past earthquakes due liquefaction. Among other categories failures, mid span collapse (without the failure abutments) pile supported bridges founded in liquefiable deposits still observed most recent earthquakes. This mech...

A least-squares method is used to determine the fundamental parameters of a simple mathematical model for the mechanical subsystem of the NEES-UCSD large high performance outdoor shaking table. The parameters identified include the effective horizontal mass, the effective horizontal stiffness, and the coefficient of the classical Coulomb friction and viscous damping elements representing the va...

A full-scale seven-story reinforced concrete building section was tested on the UCSDNEES shake table during the period October 2005 January 2006. The shake table tests were designed to damage the building progressively through four historical earthquake records. At various levels of damage, ambient vibration tests and low amplitude white noise base excitations with root-mean-square acceleration...