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PB85194371

Publication Date	1984
Personal Author	Ewing, R. D.; Johnson, A. W.; Kariotis, J. C.
Page Count	208
Abstract	This report presents a methodology for the mitigation of seismic hazards in existing unreinforced masonry (URM) buildings. Attention is focused on selection of the seismic risk zone, and on design spectra for seismic hazard reduction. A procedure for field surveys of existing URM buildings is recommended and the response of existing structural systems to earthquakes is considered. Methodologies for mitigating seismic hazard in areas of design ground motion of effective peak acceleration of .1G, .2G, and .4G are presented. The philosophy used to develop recommended capacities of existing materials is discussed and the methodology is compared to current seismic reduction requirements.
Keywords	Masonry Buildings Methodology Seismic waves Hazards Dynamic structural analysis Earthquake resistant structures Earthquakes Earthquake engineering Ground motion Seismic risk
Source Agency	National Science Foundation, Division of Civil and Environmental Engineering.
NTIS Subject Category	89B - Architectural Design & Environmental Engineering 89D - Structural Analyses
Corporate Authors	ABK, El Segundo, CA.; National Science Foundation, Washington, DC.
Supplemental Notes	See also PB83-194498.
Document Type	Technical Report
Title Note	Topical rept.
NTIS Issue Number	198517
Contract Number	NSF-C-PFR78-19200

Methodology for Mitigation of Seismic Hazards in Existing Unreinforced Masonry Buildings: The Methodology (Revised).

Methodology for Mitigation of Seismic Hazards in Existing Unreinforced Masonry Buildings: The Methodology (Revised).
PB85194371

Publication Date	1984
Personal Author	Ewing, R. D.; Johnson, A. W.; Kariotis, J. C.
Page Count	208
Abstract	This report presents a methodology for the mitigation of seismic hazards in existing unreinforced masonry (URM) buildings. Attention is focused on selection of the seismic risk zone, and on design spectra for seismic hazard reduction. A procedure for field surveys of existing URM buildings is recommended and the response of existing structural systems to earthquakes is considered. Methodologies for mitigating seismic hazard in areas of design ground motion of effective peak acceleration of .1G, .2G, and .4G are presented. The philosophy used to develop recommended capacities of existing materials is discussed and the methodology is compared to current seismic reduction requirements.
Keywords	Masonry Buildings Methodology Seismic waves Hazards Dynamic structural analysis Earthquake resistant structures Earthquakes Earthquake engineering Ground motion Seismic risk
Source Agency	National Science Foundation, Division of Civil and Environmental Engineering.
NTIS Subject Category	89B - Architectural Design & Environmental Engineering 89D - Structural Analyses
Corporate Authors	ABK, El Segundo, CA.; National Science Foundation, Washington, DC.
Supplemental Notes	See also PB83-194498.
Document Type	Technical Report
Title Note	Topical rept.
NTIS Issue Number	198517
Contract Number	NSF-C-PFR78-19200