Engineering characterization of ground motion. Task I. Effects of characteristics of free-field motion on structural response

Kennedy, R.P.; Short, S.A.; Merz, Klaus; Tokarz, F.J.; Idriss, I. M.; Sadigh, K.

doi:10.2172/6848574

Cited by 50 publications

(33 citation statements)

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“…The calculated effective frequency for a SDOF structure, based on the approach in NUREG/CR-3805 [9] is also shown in Figure 3.21 and provides a reasonable estimate of the effective frequency. The calculated effective frequency is given by the relationship…”

Section: The Influence Of Soil-structure-interaction On the Inelasticmentioning

confidence: 85%

The Influence of Soil-Structure-Interaction on the Inelastic Force Reduction Factor, Fm

Bozard¹

2002

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Section: The Influence Of Soil-structure-interaction On the Inelasticmentioning

confidence: 85%

The Influence of Soil-Structure-Interaction on the Inelastic Force Reduction Factor, Fm

Bozard¹

2002

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“…Both alternatives for c have been considered because the latter, as suggested in [13], led to a more efficient IM in case of slender structures whose behavior is influenced by higher modes of vibration. f) The spectral pseudo-acceleration averaged over a period interval [20], defined as:…”

Section: Choice Of Immentioning

confidence: 99%

“…As suggested in [20], in numerical calculations the following alternative pairs have been introduced: a = T 1 , b = 1.5T 1 , and: a = T 2 , b = T 1 .…”

Section: Choice Of Immentioning

confidence: 99%

Performance-Based Design as a Strategy for Risk Reduction: Application to Seismic Risk Assessment of Composite Steel-Concrete Frames

Augusti¹,

Ciampoli²

2009

IFIP Advances in Information and Communication Technology

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Abstract. Performance-based design is an efficient strategy for assessing and reducing the risk that a construction violates some performance requirement. In this paper, a procedure for performance-based assessment of seismic risk is illustrated with reference to a composite steel-concrete frame structure. Such risk is conventionally evaluated in a simplified formulation, i.e. as the mean annual frequency of exceeding a threshold level of damage in any significant structural element. The procedure is applied to evaluate the site seismic hazard, the structural damage, the corresponding capacity, and finally the seismic risk of a plane frame, extrapolated from a 3-D structure that was subjected to experimental tests at the ELSA-JRC Laboratory in Ispra, Italy. Specific attention is given to the choice of the intensity and damage measures for use in performance-based seismic risk assessment of composite steel-concrete frames.

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“…In fact, it is now well known [see, for instance, NUREG/CR-3805 (11)] that realistic peak-to-valley variations in motion response spectra have a significant impact on inelastic behavior; artificial motions with smooth spectra, therefore, are not generally adequate in realistically representing variations in inelastic response potential of motion. (This point has been a major motivation for developing highly realistic motion simulations, with representative peak-to-valley variations, in earlier Phase 1 research and in later parts of present Phase 2 research, where evaluating realistic non-linear responses, and responses sensitive to multiple frequencies, has been of prime importance).…”

Section: -2mentioning

confidence: 99%

Ground motion input in seismic evaluation studies

Sewell¹,

Wu²

1996

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This report was prepared as an a m u n t of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process. or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recorn- I ABSTRACTThis report documents research pertaining to conservatism and variability in seismic risk estimates. Specifically, it examines whether or not artificial motions produce unrealistic evaluation demands, i.e., demands significantly inconsistent with those expected from real earthquake motions.To study these issues, two types of artificial motions are considered: (a) motions with smooth response spectra, and (b) motions with realistic variations in spectral amplitude across vibration frequency. For both types of artificial motion, time histories are generated to match target spectral shapes. For comparison, empirical motions representative of those that might result from strong earthquakes in the Eastern U.S. are also considered.'The study findings suggest that artificial motions resulting from typical simulation approaches (aimed at matching a given target spectrum) are generally adequate and appropriate in representing the peak-response demands that may be induced in linear structures and equipment responding to real earthquake motions. Also, given similar input Fourier energies at high-frequencies, levels of input Fourier energy at low frequencies observed for artificial motions are substantially similar to those levels noted in real earthquake motions.In addition, the study reveals specific problems resulting from the application of Western U.S. type motions for seismic evaluation of Eastern U.S. nuclear power plants.iii -, --* I -, -

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Engineering characterization of ground motion. Task I. Effects of characteristics of free-field motion on structural response

Cited by 50 publications

References 0 publications

The Influence of Soil-Structure-Interaction on the Inelastic Force Reduction Factor, Fm

The Influence of Soil-Structure-Interaction on the Inelastic Force Reduction Factor, Fm

Performance-Based Design as a Strategy for Risk Reduction: Application to Seismic Risk Assessment of Composite Steel-Concrete Frames

Ground motion input in seismic evaluation studies

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