SEISMIC WEAKNESSES OF SOME RESIDENTIAL WOOD FRAMED BUILDINGS - CONFIRMATIONS FROM THE 1994 NORTHRIDGE EARTHQUAKE

As part of the reconnaissance team of the Canadian Association for Ear thquake Engineering (CAEE), the authors visited the epicentral region of the January 17, 1994, Northridge earthquake. This paper reviews the various potential weaknesses of some residential timber framed buildi ngs. The damage observed during the Northridge earthquake as a result of these weaknesses is used to illustrate the need to introduce engine ering concepts in the seismic design and retrofit of residential wood structures. Typical mitigation procedures to strengthen and increase t he earthquake safety of wood buildings are discussed. Recognizing the close similarity between residential construction practice in Canada a nd the U.S., the information presented is topical for Canadian enginee rs, architects and owners.