Energy-based response of simple structural systems by using simulated ground motions

Ozsarac, Volkan; Karimzadeh, Shaghayegh; Erberik, Murat Altuğ; Askan, Ayşegül

doi:10.1016/j.proeng.2017.09.009

Cited by 6 publications

(7 citation statements)

References 10 publications

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“…In literature, many approximate formulas have been proposed for obtention of the maximum seismic input energy [19,22,[24][25][26][27][28]. Moreover, the seismic input energy spectra have been created for a specific strong ground motion and the input energy values of both elastic and inelastic systems have been obtained practically via these graphs [24,[37][38][39][40][41][42][43][44][45]. In brief definition, the seismic input energy spectra are the graphs which combine the maximum energy input values corresponds to different natural vibration periods of SDOF systems.…”

Section: Input Energy Spectramentioning

confidence: 99%

“…Peak ground acceleration, peak ground velocity, the ratio of peak ground acceleration to peak ground velocity, the duration and predominant periods of ground motions, fault type and mechanism, distance to the fault, the magnitude of ground motions and soil conditions were referred in many previous studies as specific parameters to obtain the seismic input energy spectra [19,25,28,[37][38][39][40][41][42][43][44]. Fajfar and Vidic [37], Sucuoglu and Nurtug [38], Decanini and Mollaioli [39], Manfredi [24], Benavent-Climent et al [40], López-Almansa et al [41], Dindar et al [42], Quinde et al [43], Alici and Sucuoglu [44] and Ozsarac et al [45] made pioneer and further investigations about the earthquake input energy spectra for both elastic and inelastic systems.…”

Section: Introductionmentioning

confidence: 99%

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A Study on Elastic Input Energy Spectra for Actual Earthquake Ground Motions at Stiff Soil Sites

Merter¹

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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In energy-based seismic design approach, effect of ground motions on structures is considered as an energy input to structures. The earthquake input energy spectra are created combining the maximum input energies of single-degree-of-freedom (SDOF) systems having a certain damping ratio for different natural vibration periods. The determination of input energy spectra is of great importance for the energy-based seismic design since the total energy input to structural systems can be practically obtained via these graphs. This study presents the investigation of elastic input energy spectra for selected actual earthquake ground motions at stiff soil sites. Accelerogram set is selected from Pacific Earthquake Engineering Research (PEER) database for the specific range of average shear wave velocities in the top thirty meters of soils. Time history analyses are conducted for linear elastic SDOF systems having viscous damping ratio of 5% and energy-time histories are computed. Then the elastic input energy spectra for selected actual earthquake ground motions are obtained. The mean of energy spectra is investigated together with the mean plus one and two standard deviations of the energy spectra. The aim of the present study is to evaluate the earthquake input energy demand spectra of SDOF systems for stiff soil site classes. The results show that the elastic design input energy spectrum can be proposed for selected ground motions at stiff soil sites.

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Section: Input Energy Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Study on Elastic Input Energy Spectra for Actual Earthquake Ground Motions at Stiff Soil Sites

Merter¹

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…Hafif şiddetli depremlerde giren enerji yapıda elastik enerji ve sönüm enerjisi olarak tüketilirken, orta şiddetli ve güçlü yer hareketlerinde bu enerjinin büyük bir çoğunluğu doğrusal olmayan davranış yoluyla (histeretik, plastik enerji olarak) tüketilmektedir. Enerji esaslı tasarım yöntemi, yapı sistemini meydana getiren elemanların elastik ve elastik ötesi davranışta tüketeceği toplam enerji kapasitesinin deprem sırasında yapıya girecek olan enerji (talep edilen enerji) ile karşılaştırması esasına dayanmaktadır [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionunclassified

Yapı sistemine giren enerji bakımından TBDY (2018) ve DBYBHY (2007) üzerine bir inceleme

Dedeoğlu¹,

Calayır²

2021

DÜMF Mühendislik Dergisi

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Enerji tabanlı sismik tasarım yaklaşımında, yapılara enerji girişi olarak deprem yer hareketi dikkate alınmaktadır. Deprem sırasında sisteme giren enerji, yapı sisteminde oluşan kinetik enerji, sönümleme enerjisi, elastik şekil değiştirme enerjisi ve histeretik enerji bileşenlerinin toplamına eşittir. Bu yüzden sisteme giren enerjinin miktarının ve ne şekilde tüketildiğinin bilinmesi önemlidir. Bu çalışmada, Elazığ il merkezinde bulunduğu varsayılan 3 adet tek serbestlik dereceli (TSD) oluşturulmuş ve bu yapı sistemlerin, DBYYHY (2007) ve TBDY (2018)'nin zemin sınıflarına ait tasarım spektrumlarına göre ölçeklenmiş deprem ivme kayıtları altındaki davranışları değerlendirilmiştir. Bu amaçla beş farklı deprem ivme kaydı seçilmiştir. Bu ivme kayıtları, yapıların bulunduğu bölge dikkate alınarak, her iki yönetmeliğin dört zemin sınıfı için oluşturulan tasarım spektrumlarına göre ayrı ayrı ölçeklendirilerek kullanılmıştır. Yapı elemanlarının doğrusal olmayan davranışı için iki-doğrulu (non-lineer) model dikkate alınmıştır. TSD modellerin hareket denklemleri Newmark ortalama ivme yöntemi kullanılarak zaman tanım alanında çözülmüştür. Her bir yapı modeline ait yer değiştirmeler zaman tanım alanında doğrusal olmayan dinamik analizlerden belirlendikten sonra, deprem etkisiyle TSD sistemlere giren toplam enerji miktarları hesaplanmıştır. Yapısal sistemlerinde oluşan yer değiştirmeler, kesme kuvvetleri ve enerji girdileri birbirleri arasına karşılaştırılarak sonuçlar değerlendirilmiştir.

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“…Decanini and Mollaioli (Decanini and Mollaioli 2001) proposed inelastic energy spectra as a function of ductility, soil type, source-to-site distance and magnitude and the energy-based spectra of the hysteretic to input energy ratio were evaluated, for different soil types and target ductility ratios. Ozsarac et al (Ozsarac et al 2017) derived ground motion data on the North Anatolian Fault by simulating moment magnitude, distance and soil conditions. The characteristics of elastic and inelastic input energies and the percentage of hysteretic energy were investigated.…”

Section: Introductionmentioning

confidence: 99%

Attenuation of Energy-based Demand Parameters

Sarı

Manuel

2021

Preprint

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The intensity of ground shaking and the demand on structures during earthquakes have been generally characterized using parameters such as peak ground acceleration as well as strength-based parameters such as response spectrum ordinates (e.g., spectral acceleration) that represent the maximum amplitude of shaking for structures with specified natural period and damping values. It has long been recognized that to assess the demands on structures during earthquakes, one might employ an energy-based approach (as an alternative to the more common strength-based one), especially when there is an interest in assessing damage potential of ground motions. An energy spectrum, obtained with the same level of effort required to construct a conventional response spectrum, is a convenient single-parameter description of both amplitude and duration of ground motion and can serve as a useful means by which to describe the performance of structures with different natural periods and damping ratios.In this study, attenuation models for Northwestern Turkey are developed for two parameters (defined herein) that are related to input energy and absorbed energy. The empirical models developed take advantage of the recent increase in the database on strong motion data for Northwestern Turkey. A total of 195 recordings from 17 recent seismic events are included in this database. The ground-motion prediction equations developed are for the geometric mean of the two horizontal components of the 5-percent damped energy parameters (elastic and inelastic input energy-equivalent acceleration, Ai, and absorbed energy-equivalent velocity, Aa) at various periods. Predictions of the energy-based parameters from the proposed attenuation model are compared with (strength-based) spectral acceleration levels predicted by Özbey et al [Soil Dyn. & Earthq. Eng., 24 (2004), pp. 115-125]. It is found that the energy demand parameters were generally greater with elastic Ai demands highest. In addition, the predicted energy-based parameter levels are compared with available Western U.S. attenuation model predictions for the same energy-based parameters. Western U.S. models predict similar energy demands to those with the proposed model. Finally, amplification factors for the energy-based parameters are proposed as a function of site class; these factors can be thought of as analogous to amplification factors for spectral acceleration as given in the NEHRP Seismic Provisions. The patterns related to the amplification are similar as with spectral acceleration in NEHRP (2001). A comparison of soil amplification effects for strength- and energy-based parameters is also discussed.

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Energy-based response of simple structural systems by using simulated ground motions

Cited by 6 publications

References 10 publications

A Study on Elastic Input Energy Spectra for Actual Earthquake Ground Motions at Stiff Soil Sites

A Study on Elastic Input Energy Spectra for Actual Earthquake Ground Motions at Stiff Soil Sites

Yapı sistemine giren enerji bakımından TBDY (2018) ve DBYBHY (2007) üzerine bir inceleme

Attenuation of Energy-based Demand Parameters

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