Performance of masonry structures during the 1994 Northridge (Los Angeles) earthquake

The surface magnitude 6.8 Northridge earthquake which struck the Los Angeles area on January 17, 1994, damaged a large number of engineered buildings, of nearly all construction types. As earthquakes of at least similar strength are expected to occur in most of eastern and western Canada, the study of the effects of this earthquake is of particular significance to Canada. This paper, as part of a concerted multi-paper reporting effort, concentrates on the damage suffered by masonry buildings during this earthquake, and explains why the various types of observed failures occurred. The seismic performance of all masonry construction similar to that commonly found in Canada is reviewed, but a particular emphasis is placed on providing an overview of damage to unreinforced masonry structures which had been rehabilitated before this earthquake. To provide a better appreciation of the impact of this earthquake on masonry buildings, and a better assessment of the engineering significance of their damage in a Can...

[1]  G. C. Hart,et al.  The Whittier Narrows, California Earthquake of October 1, 1987—Masonry Building Performance Survey , 1988 .

[2]  D. E. Allen,et al.  Guidelines for the seismic evaluation of existing buildings , 1995 .

[3]  Peter W. Weigand.  The January 17, 1994, Northridge (California) Earthquake , 1994 .

[4]  David D. Miller,et al.  The Morgan Hill Earthquake of April 24, 1984—Effects on Industrial Facilities, Buildings, and Other Facilities , 1985 .

[5]  Michel Bruneau,et al.  Seismic evaluation of unreinforced masonry buildings — a state-of-the-art report , 1994 .

[6]  A. Filiatrault,et al.  Discussion: Overview of seismic provision changes in National Building Code of Canada 1990 , 1993 .

[7]  Jack P. Moehle,et al.  Preliminary report on the seismological and engineering aspects of the January 17, 1994 Northridge Earthquake , 1994 .

[8]  R. P. Maley,et al.  Accelerograms recorded at USGS National Strong-Motion Network stations during the Ms=6.6 Northridge, California earthquake of January 17, 1994 , 1994 .

[9]  William J. Petak,et al.  The politics and economics of earthquake hazard mitigation : unreinforced masonry buildings in southern California , 1986 .

[10]  Dudley Frank Pegrum.  Residential population and urban transport facilities in the Los Angeles metropolitan area , 1964 .

[11]  Michel Bruneau,et al.  Review of NBCC earthquake-resistant design requirements for cladding connectors , 1994 .

[12]  Julie Mark Cohen.  Cladding Design: Whose Responsibility? , 1991 .

[13]  Michel Bruneau,et al.  State-of-the-art report on seismic performance of unreinforced masonry buildings , 1995 .

[14]  L. Murphy,et al.  San Fernando, California, earthquake of February 9, 1971 , 1973 .