SEISMIC DESIGN OF BASE-ISOLATED STRUCTURES USING CONSTANT STRENGTH SPECTRA |
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Authors: | ARTURO TENA-COLUNGA |
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Institution: | Departamento de Materiales , Universidad Autónoma Metropolitana Azcapotzalco , Av. San Pablo #180, Col. Reynosa Tamavlipas, 02200 México, DF, Mexico E-mail: atc@correo.azc.uam.mx |
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Abstract: | This paper presents the concept of constant strength design spectra for the design of base-isolated structures; particularly those structures using isolators with a bilinear hys-teretic behaviour when subjected to dynamic loading. The constant strength design spectra relate peak accelerations, velocities, displacements and effective isolated natural periods for bilinear systems with a given yield strength and post yield stiffness. Constant strength design spectra could be useful for the design of base isolators with bilinear hysteretic behaviour, as these devices can be designed for fixed yield strength and post yield stiffness. The concept of constant strength design spectra and its application for the design of base isolated structures is illustrated with case studies of specific structures. |
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Keywords: | Base isolation constant strength spectra displacement design methods inelastic spectra seismic design |
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