Seismic Safety Regulation of Existing Structures

by Melvyn Green, Melvyn Green & Associates Inc, United States,

Document Type: Proceeding Paper

Part of: Seismic Engineering: Research and Practice


Establishment of standards for seismic strengthening of existing buildings has been difficult since full compliance with current codes is generally too expensive. A general consensus has evolved which is to provide some minimum level of life safety. This approach is now embodied in codes such as the City of Los Angeles Seismic Hazard Mitigation Ordinance and the Uniform Code for Building Conservation which address unreinforced masonry bearing wall buildings. A greater difficulty arises in developing standards for non-ductile concrete frames, tilt-up concrete structures, steel frame buildings and others that have been deemed potentially hazardous. This paper summarizes efforts to data and presents a performance approach for developing new regulations.

Subject Headings: Structural safety | Concrete frames | Steel frames | Steel structures | Seismic tests | Seismic effects | Existing buildings | Building codes | Los Angeles | California | United States

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