THE USE OF CUMULATIVE DUCTILITY STRENGTH SPECTRA FORSEISMIC DESIGN AGAINST LOW CYCLE FATIGUE

摘要

Damage models that quantify the severity of repeated plastic cycling through plastic energy are simplerntools that can be used for practical seismic design. The concept of constant cumulative ductility strengthrnspectra, developed from one such model, is a useful tool for performance-based seismic design.rnParticularly, constant cumulative ductility strength spectra can be used to identify cases in which lowrncycle fatigue may become a design issue, and provides quantitative means to estimate the design lateralrnstrength that should be provided to a structure to adequately control its cumulative plastic deformationrndemands during seismic response.