Published in SMIP98 Seminar on Utilization of Strong-Motion Data, September 15, 1998, pages 135-154. CA Department of Conservation, Geological Survey. This article can also be found online at http://www.consrv.ca.gov/cgs/smip/docs/seminar/smip98/Pages/paper8_chopra.aspx.
Summarized in this paper are the results of two recent investigations utilizing recorded motions of buildings to develop improvements in two aspects of seismic code provisions for buildings: (1) fundamental vibration period formulas, and (2) accidental torsion.
Civil and Environmental Engineering