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Full-Text Articles in Engineering
Seismic Performance Of Substandard Reinforced Concrete Bridge Columns Under Subduction-Zone Ground Motions, Alvaro Francisco Lopez Ibaceta
Seismic Performance Of Substandard Reinforced Concrete Bridge Columns Under Subduction-Zone Ground Motions, Alvaro Francisco Lopez Ibaceta
Dissertations and Theses
A large magnitude, long duration subduction earthquake is impending in the Pacific Northwest, which lies near the Cascadia Subduction Zone (CSZ). Great subduction zone earthquakes are the largest earthquakes in the world and are the sole source zones that can produce earthquakes greater than M8.5. Additionally, the increased duration of a CSZ earthquake may result in more structural damage than expected. Given such seismic hazard, the assessment of reinforced concrete substructures has become crucial in order to prioritize the bridges that may need to be retrofitted and to maintain the highway network operable after a major seismic event. Recent long …
Assessment Of Seismic Retrofit Prioritization Methodology For Oregon's Highway Bridges Based On The Vulnerability Of Highway Segments, Selamawit Tesfayesus Mehary
Assessment Of Seismic Retrofit Prioritization Methodology For Oregon's Highway Bridges Based On The Vulnerability Of Highway Segments, Selamawit Tesfayesus Mehary
Dissertations and Theses
Geologists have indicated that the question is not if a catastrophic earthquake will occur in Oregon but when one will occur. Scientists estimate that there is close to 40 percent conditional probability that a Cascadia subduction zone earthquake of magnitude 8.0 or above will strike Oregon in the next 50 years. In addition, the majority of Oregon's bridge inventory was built prior to the current understanding of bridge response and prior to current understanding of the expected earthquake demands. In order to minimize potential bridge damage in the case of an earthquake, one approach is to retrofit seismically deficient bridges. …
Substation Bay Modeling And Seismic Sensitivity Study, Robert C.H. London
Substation Bay Modeling And Seismic Sensitivity Study, Robert C.H. London
Civil and Environmental Engineering Master's Project Reports
The performance of high voltage electrical substations during an earthquake significantly contributes to regional resilience by providing electrical power to public entities, businesses and homes following an earthquake. Utilities try to minimize the seismic impact by qualifying individual equipment, but rarely evaluate the interconnected substation bay as a whole. In this study, three detailed numerical models were developed using the seismic qualification reports of individual electrical equipment as basis for the components within 115kV, 230kV, and 500 kV substation bay systems. The substation bays were evaluated without interconnectivity of the components and with rigid bus connectivity between components. The models …