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Improving the Seismic Performance of Existing Buildings and by Barry Goodno

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By Barry Goodno

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Extra info for Improving the Seismic Performance of Existing Buildings and Other Structures: Proceedings of the 2009 ATC & SEI Conference on Improving the Seismic ... 2009, San

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St. Louis applied for grant to perform risk assessment. Results unknown. No known mitigation. State commissioned seismic study of 300 buildings in 2000. Results unknown. No known mitigation. St. Louis employs typical code renovation triggers on this building type. No other known program. Not consistently applied. Adoption of IBC and IEBC may start to accomplish some mitigation. No known activity. No known activity. Similar to incentives described under CA but far less extensive. However, most seismic rehabilitation in the mid south may be of this type.

San Francisco passed local bond for city owned buildings, LA county had post Northridge inventory/ evaluation program. LA, Pasadena, Oakland, Berkeley, SF City Halls have been retrofit. Prop 122 starting in 1990 gathered data for 16,000 state buildings, reduced in steps to 450 of highest priority. Currently fixed or in progress: 166. AB 233 (1977) required a seismic evaluation of all courthouses (452) in the state. 1986 State passed SB 547 requiring jurisdictions in high seismic zones to inventory URM and develop mitigation program.

2000: Evaluation complete. In 442 hospitals, 1400 buildings ok; 200 life safe; 950 no good. 2002: Deadline for critical nonstructural anchorage. Reasonable compliance, but poor formal approval rate. 2008: Deadline for Life Safety. Essentially postponed to 2013/2015. Currently: approx 60 major replacement projects ongoing, but few retrofits. 2015: Expected compliance will be moderate. Emergency Response State/Local Gov’t URM/other Mandatory Code Triggers Many cities mitigated fire stations. Some have mitigated police stations and/or emergency centers.

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