Draft revision of NZS4203: 1984: Seismic provisions

SUMMARYA statistical analysis is performed to investigate the significance of peak ground acceleration to velocity ratio ( u h ) on the displacement ductility demand of simple bilinear hysteretic systems. Three groups of earthquake records representative of low, normal and high a/v ranges are used as input ground motions. The design yield strength of the inelastic systems is specified from the base shear formula in the 1980 National Building Code of Canada (NBCC 1980) and that in NBCC 1985 respectively. The former case represents the common practice of specifying seismic design base shear based on a peak site acceleration, while in the latter case the base shear is specified based on peak ground velocity and u/u ratio. Mean displacement ductility demands are obtained for the three groups of ground motions; and the corresponding dispersion characteristics are examined. The results show that the ground motion u/u range has a significant effect on the displacement ductility demand, and it should be accounted for in design strength specification.

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Effect of peak ground acceleration to velocity ratio on ductility demand of inelastic systems

Zhu

Heidebrecht

Tso

1988

Earthq Engng Struct Dyn

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Effect of Peak Ground a/v Ratio on Structural Damage

1988

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Structures of limited ductility

Group¹

1986

BNZSEE

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Draft revision of NZS4203: 1984: Seismic provisions

Abstract: A draft, revision to NZS4203:1984 [1] is now available for public comment. Significant changes to the existing seismic provisions are proposed. The basis for some of these are discussed and, where appropriate, resulting values are compared with the current provisions.

Cited by 3 publications

References 9 publications

Effect of peak ground acceleration to velocity ratio on ductility demand of inelastic systems

Effect of peak ground acceleration to velocity ratio on ductility demand of inelastic systems

Effect of Peak Ground a/v Ratio on Structural Damage

Structures of limited ductility

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