Concurrent Design Forces in Structures under Three-Component Orthotropic Seismic Excitation
- 1 February 2002
- journal article
- research article
- Published by SAGE Publications in Earthquake Spectra
- Vol. 18 (1), 1-17
- https://doi.org/10.1193/1.1463040
Abstract
According to the model of Penzien and Watabe, the three translational ground motion components on a specific point of the ground are statistically noncorrelated along a well-defined orthogonal system of axes p, w, and v, whose orientation remains reasonably stable over time during the strong motion phase of an earthquake. This orthotropic ground motion is described by three generally independent response spectra Sa, Sb, and Sc, respectively. The paper presents an antiseismic design procedure for structures according to the above seismic motion model. This design includes a) determination of the critical orientation of the seismic input, i.e., the orientation that gives the largest response, b) calculation of the maximum and the minimum values of any response quantity, and c) application of either the Extreme Stress Method or the Extreme Force Method for determining the most unfavorable combinations of several stress resultants (or sectional forces) acting concurrently at a specified section of a structural member.This publication has 12 references indexed in Scilit:
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