Koliou Research Group
Structural Testing & Damage Mitigation of Lifelines
Electrical substations are vital components of electric power networks. Electrical substation equipment has exhibited vulnerable seismic behavior during several earthquakes worldwide including the 1989 Loma Prieta, and 1994 Northridge earthquakes in California, the 1995 Kobe earthquake in Japan, the 1999 Izmit earthquake in Turkey, and the 1999 Chi-Chi earthquake in Taiwan. The overall seismic performance of substation equipment varies. Equipment operating at or below 115kV (low voltage equipment) appears to perform well when properly anchored, while the performance of high voltage equipment (at or above 220kV) depends on the specific types of components and their installation practices. Most of the severe seismic damage to electrical substation equipment was observed in high voltage transformer-bushing systems. The rapid post-earthquake recovery of electric substations is of great significance to the community recovery and resilience.
Dr. Koliou's research focus is on developing sustainable retrofit solutions and assessing (analytically and experimentally) their seismic risk performance with an ultimate objective to minimize the loss of functionality of such components following an extreme ground shaking.