Affiliation: | Department of Civil Engineering, Apperson 202, Oregon State University, Corvallis, Oregon 97331–2302.;Department of Civil Engineering, Apperson 202, Oregon State University, Corvallis, Oregon 97331–2302. Woods is the corresponding author.;Richard Catlin &Associates, Inc., 2165 W. Park Court, Suite M, Stone Mountain, Georgia 30087–3540. |