Postprint version. Published in Proceedings of Structures Congress 1993: Structural Engineering in Natural Hazards Mitigation, April 19, 1993, pages 217-222. Copyright © 1993 American Society of Civil Engineers. The definitive version can be found online at http://cedb.asce.org.
NOTE: At the time of publication, the author Rakesh Goel was not yet affiliated with Cal Poly.
The effects of plan asymmetry on the earthquake response of code-designed, one-story systems are identified with the objective of evaluating how well these effects are represented by torsional provisions in US building codes. The earthquake-induced deformations and ductility demands on resisting elements of asymmetric-plan systems, are compared with their values if the system plan were symmetric. The presented results demonstrate that the design eccentricity in US building codes should be modified in order to achieve the desirable goal of similar ductility demands on asymmetric-plan and symmetric-plan systems. The design eccentricity should be defined differently depending on the design value of the reduction factor R.
Civil and Environmental Engineering