Selection and scaling of earthquake records in assessment of structures in low-to-moderate seismicity zones

Catalan, A.; Benavent‐Climent, Amadeo; Cahís, X.

doi:10.1016/j.soildyn.2009.09.003

Cited by 18 publications

(4 citation statements)

References 11 publications

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“…It should be mentioned that the minimum number of records required for dynamic analyses is affected by many situations, such as the purpose (i.e., the estimated mean or distribution of the structural response), the accuracy of predicted structural responses, the probability of structural collapse, and the degree of structural nonlinearity [35]. If the statistical distribution of the structural responses or the probability of structural collapse is considered in the analysis, the required number of records would be more, i.e., 30 and 60 [22,23,36]. is study aims to investigate the structural mean response demands (e.g., interstory drift ratios) calculated by the ASM and LSM methods.…”

Section: Selection Of Ground Motionsmentioning

confidence: 99%

Comparison of Scaling Ground Motions Using Arithmetic with Logarithm Values for Spectral Matching Procedure

Zhang

Wang

Chen

et al. 2020

Shock and Vibration

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In recent studies, spectral matching is the most commonly proposed method for selecting earthquake records for time-history analysis of structures. However, until now, there have been no serious investigations of the effects of coordinate values on the scaling of ground motions. This paper investigated the influence of using arithmetic and logarithmic values of response spectra in spectral matching procedures (i.e., ASM and LSM methods) on the results of nonlinear structural time-history analysis. Steel moment resisting frame structures of the 3-, 9-, and 20-stories, which represent low-, medium-, and high-rise buildings, respectively, were used as examples. Structural benchmark responses were determined by calculating the arithmetic mean and median of peak interstory drift ratio (PIDR) demands based on the three record sets developed by the American SAC Steel Project. The three record sets represent seismic hazard levels with 50%, 10%, and 2% probabilities exceeded in 50 years, and their average acceleration spectra were also taken as the target spectrum. Moreover, another 40 record components for selection were scaled both by ASM and LSM methods. The seven components whose spectra were best compatible with the target spectra were selected for the structural time-history analysis. The scale factors obtained by the LSM method are nearly larger than that of the ASM method, and their ranking and selection of records are different. The estimation accuracies of structural mean (median) responses by both methods can be controlled within an engineering acceptable range (±20%), but the LSM method may cause larger structural responses than the ASM method. The LSM method has a better capacity for reducing the variability of structural responses than the ASM method, and this advantage is more significant for longer-period structures (e.g., 20-story structure) with more severe nonlinear responses.

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Section: Selection Of Ground Motionsmentioning

confidence: 99%

Comparison of Scaling Ground Motions Using Arithmetic with Logarithm Values for Spectral Matching Procedure

Zhang

Wang

Chen

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

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“…The columns of each story had the same reinforcement along their height, while in the beams, the reinforcement was di erent at each end. For detailed data, see [26]. The building was located in Granada (Spain) on sti to medium soil, between type II and type III.…”

Section: Database Descriptionmentioning

confidence: 99%

On-Line Seismic Database With Seismological and Structural Parameters

2018

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Abstract. In this paper, a new free online seismic database is presented. The database has 15 seismological and 26 deducted engineering parameters to search for available records for structural seismic analysis. As known, the selection and scaling of seismic records acquire primary importance in seismic analysis. Moreover, the application and development of Performance-Based Earthquake Engineering (PBEE) implies nding records in di erent levels of the return period. This is a time-consuming and cumbersome procedure and the whole process is a ected by great randomness. A database with speci c parameters that permits nding best suited records would prove very useful. As a consequence, the randomness both in the seismic action and in the results of the dynamic behavior of the structure can be strongly reduced. This is the objective of the new database. In this work, the authors describe the new database and develop a numerical application with 3 di erent bins of parameters of selection for records and results of structural analyses. The great usefulness of the database is shown.

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“…Therefore the selection of a suitable acceleration-time history records that reflect all the aforementioned seismicity requirements is not an easy task and in some cases the records selection is more critical than the building modeling [13] . The available data bases of recorded acceleration-time histories are mostly for high seismicity zones and very rare records available for low to moderate seismicity zones as the case of Iraq especially in soft soils [14] , which requires a scaling of the selected records to be consistent with the site characteristics. Many scaling procedures have been proposed, however the most suitable procedure is the spectrum scaling in which the acceleration-time record is scaled to be compatible with the design spectrum of the building [15,16,17,18] .…”

Section: Nonlinear Time History Analysis For Seismic Evaluation Of Bumentioning

confidence: 99%

Seismic Analysis of Reinforced Concrete Buildings in South of Iraq based on Different Codes

Al-Jassim¹,

Raheem²

2018

IJET

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Buildings in south of Iraq were designed for gravity loads only. Recent studies showed that the Badra-Amarah fault at the Iraq-Iran boarder is an active fault and could suffer a major damage. Hence seismic evaluation of existing buildings is getting more importance. The objective of this paper is to assess the seismic performance of two reinforced concrete buildings with six floors each, one has a shear wall and the other has not. The concentrated plasticity with nonlinear time history is adopted for the analysis. The spectrum matching method is used to scale three time-acceleration records to the expected seismic level in the region. Three different codes are used for the analysis, the International building code-2012, the Uniform building code-1997 and the Iraqi seismic code-2017. Comparison of results showed that IBC-2012 gave the most conservative results in displacements, number and performance of plastic hinges and base shear. The Iraqi code gave the least values within 60% for the base shear and 18-50% for drifts. As a conclusion, the analyzed buildings are a little beyond the elastic level according to the Iraqi code, beyond the immediate occupancy level according to the UBC-1997 and near the collapse prevention level according to IBC-2012.

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Selection and scaling of earthquake records in assessment of structures in low-to-moderate seismicity zones

Cited by 18 publications

References 11 publications

Comparison of Scaling Ground Motions Using Arithmetic with Logarithm Values for Spectral Matching Procedure

Comparison of Scaling Ground Motions Using Arithmetic with Logarithm Values for Spectral Matching Procedure

On-Line Seismic Database With Seismological and Structural Parameters

Seismic Analysis of Reinforced Concrete Buildings in South of Iraq based on Different Codes

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