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Evaluation Of Torsional Provisions In Seismic Codes, Anil K. Chopra, Rakesh K. Goel
Evaluation Of Torsional Provisions In Seismic Codes, Anil K. Chopra, Rakesh K. Goel
Civil and Environmental Engineering
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 building codes. The earthquake-induced deformations and ductility demands on resisting elements of asymmetric-plan systems, designed according to several different codes, are compared with their values if the system plan were symmetric. The presented results demonstrate that the design eccentricity in 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 for elastic …
Effects Of Plan Asymmetry In Inelastic Seismic Response Of One-Story Systems, Rakesh K. Goel, Anil K. Chopra
Effects Of Plan Asymmetry In Inelastic Seismic Response Of One-Story Systems, Rakesh K. Goel, Anil K. Chopra
Civil and Environmental Engineering
The effects of plan asymmetry on the earthquake response of one-story systems are identified by comparing the dynamic response of an asymmetric-plan system and the corresponding symmetric-plan system for a wide range of system parameters—uncoupled lateral vibration period, uncoupled torsional-to-lateral frequency ratio, stiffness eccentricity, and yield factor. Elastic as well as inelastic systems are studied. For the latter, two values of the strength eccentricity are considered: equal to the stiffness eccentricity and zero; the latter is representative of code-designed buildings. Based on the response results for a wide range of system parameters, this paper identifies how the structural response is …