NEHRP Clearinghouse

Title
Seismic Response of Nominally Symmetric Systems with Strength Uncertainty.
File
PB98153422.pdf
Author(s)
Balopoulou, S.; Grigoriu, M.
Source
National Science Foundation, Arlington, VA., December 23, 1997, 216 p.
Identifying Number(s)
NCEER-97-0015
Abstract
The study described in this report focused on evaluating the effects of the seismic response and design of two aspects of system uncertainty: uncertainty in the functional form of the restoring force model of the lateral load resisting elements, and uncertainty in the parameters of this model. A simple one-storey structure and a realistic seven-storey structure, both designed according to the 1994 Uniform Building code provisions, were evaluated. The restoring force models used were the modified Clough and elastoplastic models. It was found that the UBC accidental eccentricity of 5% was inadequate to account for accidental torsion caused by strength uncertainty.
Keywords
Acceleration (Physics); Buildings; Building codes; El Centro earthquake; Earthquake engineering; Lateral pressure; Seismic design; Probability theory; Torsion; Mathematical models; Eccentricity; Motion