PERFORMANCE OF UNSTIFFENED STEEL PLATE SHEAR WALLS UNDER CYCLIC QUASI-STATIC LOADING by ADAM S. LUBELL B.A.Sc, University of Waterloo, 1995 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE STUDIES Department of Civil Engineering We accept this thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA June 1997 © Adam Lubell, 1997