A study on determination of target displacement of RC frames using PSV spectrum and energy-balance concept

Uçar, Taner; Merter, Onur; Düzgün, Mustafa

doi:10.12989/sem.2012.41.6.759

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…Önerilen metodolojiye dayalı olarak tahmin edilen doğrusal olmayan tepkiler ile doğrusal olmayan zaman tanım alanı analizi sonuçları ile karşılaştırılarak değerlendirilmiştir. Uçar [35] çalışmasında, toplam yapı sistemine giren enerjisinin kat seviyelerine dağıtılması için pratik bir formülasyon sunmuştur. Yapılan çalışmalardan yapı sistemlerinin enerji esaslı değerlendirilmesinde, sisteme giren maksimum enerjinin belirlenmesinde kullanılan giren enerji spektrumlarının oldukça önem arz ettiği görülmektedir.…”

Section: Theory and Methodsunclassified

Türkiye’de meydana gelmiş depremlere dayalı elastik giren enerji spektrumu geliştirilmesi

Dedeoğlu,

Calayır

2024

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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Yapıların enerji esaslı değerlendirilmesinde, yer hareketlerinin etkisi sisteme giren enerji girişi vasıtasıyla göz önüne dikkate alınmaktadır. Bu yaklaşımda, öncelikli hedef yapı sistemine giren enerjinin belirlenmesidir. Bu giren enerjinin pratik bir şekilde belirlenmesinde kullanılabilecek giren enerji spektrumlarının oluşturulması, enerji esaslı değerlendirme için büyük önem arz etmektedir. Yapılan bu çalışmada, deprem etkisiyle TBDY (2018)’e göre ZC ve ZD zemin sınıfına sahip elastik yapı sistemleri için maksimum giren enerjinin belirlenmesinde kullanılabilecek temel elastik giren enerji spektrumunun elde edilmesi amaçlanmıştır. Bu nedenle, öncelikle Türkiye’de meydana gelen ve veri istasyon zemin sınıfı ZC ve ZD olan bir dizi kuvvetli deprem yer hareketi seçilmiştir. Ardından bu kuvvetli deprem yer hareketlerine ait ivme kayıtları, PGA değerleri 0.1 g olacak şekilde ölçeklendirilmiştir. Her bir zemin sınıfına ait bu ölçekli ivme kayıtları kullanılarak kütleye göre normalize edilmiş elastik giren enerji spektrumları bulunmuş ve bu spektrumlardan faydalanılarak söz konusu zemin sınıfı için ortalama giren enerji spektrumu elde edilmiştir. Kütleye göre normalize edilmiş ortalama giren enerji spektrumu idealize edilerek, söz konusu zemin sınıfı için doğrusal elastik sistemlere giren maksimum enerjinin pratik olarak belirlenmesinde kullanılabilecek bir temel elastik giren enerji spektrumu önerilmiştir. Önerilen spektrumun etkinliği, her iki zemin sınıfı için zaman tanım alanı çözümlerine dayalı olarak elde edilen giren enerji spektrumları ile karşılaştırılarak irdelenmiştir.

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Section: Theory and Methodsunclassified

Türkiye’de meydana gelmiş depremlere dayalı elastik giren enerji spektrumu geliştirilmesi

Dedeoğlu,

Calayır

2024

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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“…Terefore, scaling records with coefcients too diferent from unity is likely to bother the intensity and frequency content relation [37]. If some recommendations in present literature are examined, it is concluded that spectral behaviour of the records becomes unclear if the records are scaled outside the 0.25-4.00 range [38,39]. For linear analyses, a maximum value of 4.0 is suggested, and for nonlinear analyses, a factor between 0.5 and 2.0 is reported to be more suitable [40][41][42].…”

Section: The Ground Motion Set and Analysesmentioning

confidence: 99%

An Investigation on Soil Amplification through Site Factors Used in Seismic Design Codes

Özmen

2023

Advances in Civil Engineering

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This article aims to investigate the site amplification through site coefficients given in the seismic codes. A set of 84 ground motion records in a base rock form and targeted to have different frequency contents was formed. The surface forms of these records altered by 100 different soil conditions were determined. Using this set of 8400 ground motion records, site amplification phenomenon is examined. After a PGA of 0.3 g, ground motions have similar behaviour in terms of short period amplification. Numerical figures as average and with a safety level of 84% for the SS and S1 site coefficients were given and compared with the code which are observed to be unconservative for stiff soils and too conservative for soft soils. Linking SS with a V S value of 600 m/s and S1 with a V S value of 120 m/s seems to be useful to understand some amplification behaviours. The variability of ZB and ZC site classes for short period site coefficient and ZE and ZD site classes for midperiod site coefficient seems to be greater when compared to others.

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“…Among the energy terms, the mass normalized seismic input energy (E I ) and hysteretic energy, i.e., plastic strain energy, (E h ) demands were extensively studied in the literature. The terms can be obtained through the solution of the energy balance equation or spectral equations (Dindar et al (2015); Alıcı and Sucuoglu (2016); Güllü et al (2019); Ucar and Merter (2019); Benavent-Climent and Mollaioli (2021); Güllü et al (2021)). Unlike conventional IM s, seismic energy covers the hysteretic behavior of the structural elements, duration-related cumulative plastic damage, and frequency characteristics of the ground motion, soil, and structure as mentioned before (Mollaioli et al (2011); Ebrahimian et al (2015)).…”

Section: Introductionmentioning

confidence: 99%

“…The study resulted that hysteretic energy is sensitive to plastic rotations. Ucar and Merter (2021) used seismic input energy as an IM to determine yield force coefficients of reinforced concrete (RC) frames. The study yielded that seismic input energy is highly effective to evaluate the behavior of RC frames.…”

Section: Introductionmentioning

confidence: 99%

Empirical correlations of constant ductility seismic input and hysteretic energies with conventional intensity measures

Hasanoğlu

Güllü

Güllü³

2023

Preprint

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Ground motion intensity measures (IMs) possess a significant role in earthquake engineering, especially during ground motion selection for nonlinear response history analyses and dynamic shake table tests as well as for probabilistic seismic engineering. Conventional IMs are not capable of accounting for the duration-related cumulative plastic damage, the frequency content of the ground motions, and the hysteretic behavior of the structural members which can be considered inherently by seismic energy-based IMs. However, many efforts have been paid for conventional IMs to relate them to the structural response. To benefit from these efforts, an empirical correlation study between energy-based and conventional IMs is required. To this end, constant ductility seismic input energy and hysteretic energy imparted to diverse single-degree-of-freedom (SDoF) systems were calculated for near-field earthquake records. The empirical correlations of the energy-based IMs with conventional spectrum-based, peak amplitude-based and cumulative-based IMs have been investigated based on the response history analyses. Further, predictive models between energy parameters and spectral acceleration were suggested considering different constant ductility levels. Hence, ground motion characteristics reflected by the input and hysteretic energy can be explicitly considered in performance-based earthquake engineering applications.

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A study on determination of target displacement of RC frames using PSV spectrum and energy-balance concept

Cited by 8 publications

References 14 publications

Türkiye’de meydana gelmiş depremlere dayalı elastik giren enerji spektrumu geliştirilmesi

Türkiye’de meydana gelmiş depremlere dayalı elastik giren enerji spektrumu geliştirilmesi

An Investigation on Soil Amplification through Site Factors Used in Seismic Design Codes

Empirical correlations of constant ductility seismic input and hysteretic energies with conventional intensity measures

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