1. The Concrete Coalition Online Database of Concrete Buildings Damaged in Earthquakes
- Author
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Ortiz, Maggie, Comartin, Craig, and Greene, Marjorie
- Abstract
The Concrete Coalition is a network of individuals, governments, institutions, and agencies with a shared interest in assessing the risk associated with dangerous nonductile concrete buildings and developing strategies for fixing them. It is a program of the Earthquake Engineering Research Institute (EERI), co-sponsored by the Pacific Earthquake Engineering Research Center (PEER), and the Applied Technology Council (ATC). The Concrete Coalition received funding support from the U.S. Geological Survey to build a database of photographs from past earthquakes that illustrate deficiencies contributing to collapse of concrete buildings. In addition to photographs, the database has been populated with information from particular buildings, including sketches, drawings, and information on retrofit. The result is an online database of concrete buildings damaged in earthquakes with information drawn from a wide variety of published sources compiled by summer interns with the guidance of mentors from structural engineering firms around the world. As this database is further populated, it will be able to help analysts understand the relative importance of deficiencies with respect to collapse and performance more generally. Data were collected in coordination with the ATC 95 project, Development of a Collapse Indicator Methodology for Existing Reinforced Concrete Buildings, where experts assembled information on buildings that have collapsed in past earthquakes. While the ATC-95 project focused exclusively on collapsed buildings, the EERI interns and mentors worked with buildings that suffered varying levels of damage from many countries. The interns identified the wide range of building characteristics in such a way that future analysis will be possible. Information was drawn from reports, drawings, photographs, and meetings with mentors and reviewers in an effort to provide insight into the important aspects of the performance of these concrete buildings. Four engineering students were selected as interns for the summer of 2012. An exciting innovation was the interaction of industry mentors and reviewers. Mentors met with the interns and discussed particular buildings with them, as well as various reconnaissance observations more generally. In addition, mentors reviewed the individual building reports prepared by the interns. The interns worked from an interactive PDF form, gathering information from various reports and published articles on the earthquakes, as well as from interviews with the mentors. Each of these reports was then reviewed and revised, based on reviewer comments. An important feature of this form is the list of design and construction characteristics. For each of the 130 characteristics, interns scoured source materials for discussions of the role of the characteristics in the building’s performance. For each characteristic, they indicated its contribution to observed damage as unlikely; possible; likely; unknown (no discussion in the sources), or not applicable (meaning that the particular characteristic was not present or otherwise not relevant for the particular building). The database will be functional by September 2013, and EERI members will be invited to browse through the reports and/or contribute their own reports. A tool kit is under development to guide users in the preparation of their own reports on particular damaged buildings in past earthquakes.
- Published
- 2014
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