Use of Cumulative Ductility Spectra Within a Deformation-Control Format for Seismic Design of Ductile Structures Subjected to Long Duration Motions

Abstract

Due to the large economical losses derived from recent seismic events, design methodologies that are based in the explicit control of the dynamic response of structures have been formulated. This article introduces, within the framework of performance-based design, a numerical methodology for the seismic design of structures that are expected to undergo severe cumulative plastic demands. The methodology explicitly considers and integrates: (1) the structural and non-structural performance of the building; (2) the life safety limit state; and (3) the prevention of low cycle fatigue.

Keywords:

• Low Cycle Fatigue
• Constant Cumulative Ductility Spectra
• Performance-based Design
• Global Predesign

Notes

FEMA [1997] “NEHRP guidelines for the seismic rehabilitation of buildings,” ASCE/FEMA 273 Prestandard.