Determination of inelastic seismic demands of RC moment resisting setback frames

Varadharajan, S.; Sehgal, V. K.; Saini, Babita

doi:10.1016/j.acme.2013.02.006

Cited by 34 publications

(21 citation statements)

References 42 publications

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“…The collapse capacity is determined using the performance-based methodology as adopted by Cornell, 2002, 2004). This procedure has been used in previous research works to determine the collapse capacity (Haselton et al, 2011a;Varadharajan et al, 2012aVaradharajan et al, , 2012bVaradharajan et al, , 2013.This procedure is briefly discussed in the following:…”

Section: Modeling Approach and Collapse Capacity Assessment Methodologymentioning

confidence: 99%

“…The review of the seismic design codes [BIS 1893(Bureau of Indian Standards, 2002), UBC 1997(International Council of Building Officials, 1997) and EC 8:2004 and previous literature works (Athanassiadou, 2008;Karavasilis et al, 2008;D'Ambrisi et al, 2009;Kappos and Stefanidou 2010;Varadharajan et al, 2012b;Varadharajan et al, 2013) shows that the seismic response evaluated is based on gross stiffness consideration, which is unrealistic. Cracking of structural members is a realistic phenomenon during seismic excitation.…”

Section: Effect Of Cracking Phenomenonmentioning

confidence: 99%

“…The collapse capacity is determined using the performance‐based methodology as adopted by (Vamvatsikos and Cornell, , ). This procedure has been used in previous research works to determine the collapse capacity (Haselton et al ., ; Varadharajan et al ., , , ).This procedure is briefly discussed in the following: The ground motions are selected for the nonlinear time history analysis. In the present study, 27 ground motions are used and nonlinear time history analysis is performed to evaluate the collapse capacity of the building models subjected to the different ground motions as described in Table 7 (Vamvatsikos and Cornell , ).…”

Section: Collapse Capacity Of Setback Buildingsmentioning

confidence: 99%

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Seismic behavior of multistory RC building frames with vertical setback irregularity

Varadharajan

Sehgal

Saini

2013

Structural Design Tall Build

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SUMMARY This paper is the second of two companion papers that aimed to examine the behavior of irregular buildings subjected to seismic excitation. In the present study, seismic response of the building frames with setback irregularity has been determined. To achieve this purpose, building frames with different geometrical configurations of setbacks are modeled and analyzed using nonlinear dynamic analysis by subjecting them to an ensemble of 27 ground motions to generate 21 060 nonlinear dynamic analysis results. These results are compiled to create a seismic response database consisting of parameters such as maximum roof displacement, maximum interstory drift ratio, maximum plastic hinge rotation and collapse risk parameters. Furthermore, nonlinear regression analysis is conducted on this database to propose simple equations to estimate the seismic response parameters. Finally, the proposed equations are validated for two‐dimensional and three‐dimensional building models, and applicability of the proposed equation in performance‐based and displacement‐based designs is briefly discussed. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Modeling Approach and Collapse Capacity Assessment Methodologymentioning

confidence: 99%

Section: Effect Of Cracking Phenomenonmentioning

confidence: 99%

Section: Collapse Capacity Of Setback Buildingsmentioning

confidence: 99%

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Seismic behavior of multistory RC building frames with vertical setback irregularity

Varadharajan

Sehgal

Saini

2013

Structural Design Tall Build

Self Cite

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“…Varadharajan vd. [6], 88 farklı geri çekme geometrisine sahip betonarme düzlem çerçevelerin inelastik sismik taleplerini belirlemişlerdir. Farklı performans seviyelerine ulaşmak için ölçeklendirilmiş 13 yer hareketi kullanmışlardır.…”

Section: Introductionunclassified

Geri Çekme Düzensizliğine Sahip Betonarme Düzlem Çerçevelerin Sismik Analizi

Başaran¹,

Hiçyilmaz²

2018

El-Cezeri Fen Ve Mühendislik Dergisi

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Bu çalışmada, geri çekme düzensizliğinin betonarme çerçeveler üzerindeki etkileri incelenmiştir. Türk Deprem Yönetmeliğine uygun olarak tasarlanan 5 katlı ve beş açıklıklı bir çerçeve ve bu çerçeveden türetilen geri çekmeli modeller üzerinde zaman tanım alanında doğrusal olmayan analizler gerçekleştirilmiştir. Yedi adet deprem ivmesi kullanılmış ve elde edilen değerlerin ortalaması alınmıştır. Analizler sonucunda kat kolonlarında oluşan en büyük eksenel kuvvet, kesme kuvveti ve eğilme momenti değerleri ile kat seviyelerinde ortaya çıkan göreli kat ötelenme oranları tespit edilerek sonuçlar referans çerçeve ile karşılaştırılmıştır. Sonuç olarak geri çekme yapılan kat ve üst kat seviyelerinde yapısal düzensizlikler ortaya çıkmış, iç kuvvet ve göreli kat ötelenme oranı değerlerinde geri çekme düşey seviyesi ve yüzdesine bağlı olarak artışlar olduğu görülmüştür.Anahtar kelimeler: Betonarme düzlem çerçeve; Geri çekme düzensizliği; Zaman tanım alanında hesap

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“…al analyzed the effect of setbacks on structural seismic responses [3][4]. Varadharajan, S and Aranda analyzed the influence of setbacks on structure ductility [5][6]. Wood analyzed the influence of setbacks on seismic response of reinforced concrete frame structures using the shaking table test [7].…”

Section: Introductionmentioning

confidence: 99%

Research on the Vertical Setback Problem of Steel Bundled Tube Structure

Hao¹,

Li²,

Zhenggang³

et al. 2017

AJCE

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Abstract:To study the mechanical performance of steel bundled-tube structures and find the reasonable setback scheme, the 18 calculation model with different setback based on the same bottom, height as well as the volume were designed. The effect of different setback methods on performance indexes such as natural vibration period of the structure, stiffness was analyzed. Stress total enhancement ratio and reference enhancement ratio are introduced to study the distribution rule of the spandrel beam stress under different vertical setback methods. The distribution rule of column stress was also analyzed. The results show that the changing rule of the equivalent wind effect coefficient is the same as the basal shearing force and basal anti-overturning moment. Reference enhancement ratio of the spandrel beam is a fixed value at a certain height and volume. Total stress enhancement ratio of the spandrel beam is mainly related to the remained height. Vertical setback causes abrupt stress in the columns. The setback influence on the columns is less than that on the beams, and the abrupt stress stories are also less. It is advised that the location of the initial setback should be as far as possible from the embedded end. The reasonable setback method should be uniform and symmetric.

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Determination of inelastic seismic demands of RC moment resisting setback frames

Cited by 34 publications

References 42 publications

Seismic behavior of multistory RC building frames with vertical setback irregularity

Seismic behavior of multistory RC building frames with vertical setback irregularity

Geri Çekme Düzensizliğine Sahip Betonarme Düzlem Çerçevelerin Sismik Analizi

Research on the Vertical Setback Problem of Steel Bundled Tube Structure

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