Seismic analysis of short-period structures subjected to the 1988 Saguenay earthquake

Léger, Pierre; Romano, Angelo

doi:10.1139/l92-060

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…At present, these two are to some extent compensatory. An interesting formulation for the period dependence of the R factor was recently given by Leger and Romano (1991). Regarding the F factor, a large parametric study resulting in specific recommendations for code modification has very recently been completed (Elhmadi and Heidebrecht (1991).…”

Section: Summary and Concluding Remarksmentioning

confidence: 99%

Towards a new base shear format in future NBCC seismic provisions

Heidebrecht¹,

Naumoski²,

Rutenberg³

1994

Can. J. Civ. Eng.

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Recent trends in the specifications of earthquake design forces are moving away from spectral amplification of ground motion towards direct evaluation of spectral values. Also, the 1988 Saguenay earthquake produced strong evidence for the need to modify the present provisions for low period structures in eastern North America. A new database consisting of 75 time histories was assembled and an extensive parametric study was undertaken to prepare new seismic response factors (S curves) for the National Building Code of Canada (NBCC). These time histories were divided into five categories (15 time histories each) on the basis of their frequency content as measured by their peak ground acceleration to peak ground velocity ratios, ranging from very high (=3) to very low (=0.5). Mean and mean + one standard deviation response spectra for one-degree-of-freedom and multi-degree-of-freedom systems were computed for the five categories using several normalizing (scaling) rules for the time histories. The results were compared and spectral amplification factors are presented. Spectra based on peak spectral velocity scaling were compared with spectra based on the present peak ground velocity scaling approach, and some differences are noted. Also, comparisons with the design spectra given in the 1991 edition of the National Earthquake Hazard Reduction Program provisions are presented. On the basis of this study, new S curves are proposed for consideration in the development of future editions of the NBCC.

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Section: Summary and Concluding Remarksmentioning

confidence: 99%

Towards a new base shear format in future NBCC seismic provisions

Heidebrecht¹,

Naumoski²,

Rutenberg³

1994

Can. J. Civ. Eng.

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Parametric evaluation of the response modification factor R considering bidirectional ground motions

Garcia,

Bazan,

Fernandez-Davila

2024

Soil Dynamics and Earthquake Engineering

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Spectrum-compatible accelerograms for inelastic seismic analysis of short-period structures located in eastern Canada

Léger¹,

Tayebi²,

Paultre³

1993

Can. J. Civ. Eng.

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Smooth design spectra are generally used to describe the seismic excitation provided by the maximum design earthquake for safety evaluation of critical facilities located in eastern Canada. However, a comprehensive study of the inelastic behaviour of critical structural systems requires a step-by-step inelastic analysis in the time domain. This paper presents a study of the inelastic seismic analysis of short-period structures subjected to ground motion acceleration time histories compatible with eastern Canadian conditions and defined ( i ) from historical records scaled to the smooth design spectrum intensity, (ii) from spectrum-compatible accelerograms generated by random vibration theory, and (iii) from the modification of the Fourier spectrum coefficients of historical records while preserving the original phase angles. The ductility demand, the input energy, the hysteretic energy, the number of yield events, and other performance indices are examined in parametric analyses to identify the type of earthquake motions that is critical for earthquake resistant design of short-period structures.Key words: earthquake resistant design, artificial accelerograms, eastern Canada.Des spectres de dimensionnement lisses sont generalement utilisis pour decrire l'excitation sismique produite par le tremblement de terre maximum pour l'ivaluation de la securitk d'aminagements critiques situes dans I'est du Canada. Cependant, une etude approfondie du comportement inelastique de systemes structuraux critiques demande une analyse inelastique pas-a-pas dans le domaine du temps. Cet article presente une etude du comportement inelastique de structures ayant de courtes periodes soumises a des secousses sismiques compatibles avec les conditions rencontrkes dans l'est du Canada et obtenues ( i ) a partir de tremblements de terre historiques Ctalonnes sur l'intensitk spectrale du spectre de dimensionnement, (ii) a partir d'accC1Crogrammes obtenus de vibrations aleatoires et compatibles avec le spectre de dimensionnement et (iii) a partir de la modification des coefficients du spectre de Fourier de tremblements de terre historiques tout en preservant les angles de phase. La demande en ductilite, l'knergie d'excitation, le nombre d'evenements de plastification et d'autres indices de performance sont examines dans des etudes paramitriques afin d'identifier le genre de secousses sismiques qui est critique pour la conception parasismique des structures avec de courtes periodes.

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Seismic analysis of short-period structures subjected to the 1988 Saguenay earthquake

Cited by 6 publications

References 22 publications

Towards a new base shear format in future NBCC seismic provisions

Towards a new base shear format in future NBCC seismic provisions

Parametric evaluation of the response modification factor R considering bidirectional ground motions

Spectrum-compatible accelerograms for inelastic seismic analysis of short-period structures located in eastern Canada

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