The Oregon Resilience Plan – Critical and Essential Buildings – February 2013 75 <br /> <br /> <br />moderate earthquakes, these buildings pose the greatest threat to life safety of any other building type <br />in the state of Oregon. This, along with the fact that URM and non-ductile concrete buildings can be <br />found in all occupancy categories, was the main reason that our task group included these vulnerable <br />buildings in our study of critical buildings. <br />Building Data and Analysis <br />After identifying the building sectors, the task group went on to identify data sources for the existing <br />building stock that could be used for assessment of the buildings’ seismic resilience. Two sources were <br />used: <br /> The 2007 Statewide Seismic Needs Assessment: Implementation of Oregon 2005 Senate Bill 2 <br />Relating to Public Safety, Earthquakes, and Seismic Rehabilitation of Public Buildings (Open File <br />Report 07-020) prepared by the Oregon Department of Geology and Mineral Industries <br />(DOGAMI), hereafter referred to as the 2007 SSNA. <br /> The Hazus Earthquake Model developed by the Department of Homeland Security and FEMA, <br />hereafter referred to as FEMA Hazus. <br />The 2007 SSNA is an assessment of existing hospitals, police and fire stations, emergency operations <br />centers, and K-12 schools throughout Oregon. This assessment was conducted using a rapid screening <br />method developed by FEMA to identify potential seismic hazards. The report provides evaluations of <br />each facility, which were visited by screeners to establish a Rapid Visual Screening (RVS) score based on <br />the FEMA 154 methodology. The data was compiled by DOGAMI, and the resulting scores were then <br />reviewed by the structural engineers in our task group, who, in the case of emergency operation <br />centers, police stations, fire stations, and acute care hospitals, reviewed the screening for every building <br />and converted the RVS scores to expected recovery scores. These scores were then placed into the <br />overall Critical Building Target States of Recovery Matrix shown in Figure 4.2. A similar procedure was <br />also used for schools, but because of the number of school buildings, only about 10 percent of the total <br />school building stock was reviewed directly. Additionally, the task group took into consideration tsunami <br />inundation, liquefaction, and landslides, which were not a part of the DOGAMI study. <br />To assess residential buildings, community retail centers, banks, critical government facilities, and <br />vulnerable buildings, data for expected damage estimates based on a Cascadia subduction zone event <br />were extracted from the FEMA Hazus model, and an analysis was performed to develop expected <br />recovery scores, which were then added to the overall matrix shown in Figure 4.3. Unlike the 2007 SSNA <br />data, which looked at each individual building, the FEMA Hazus model utilizes a complex series of <br />statistical analyses to predict damage estimates. This involves making predictions about the quantity, <br />size, and construction of buildings in various sectors based on census data, and then calculating an <br />expected performance for these buildings using additional statistical models. While this is a useful tool <br />for looking at large populations of buildings, the outcomes do not correlate directly to any specific <br />buildings. Because more detailed reports were not available, this data was used to establish expected