Prediction of compressive and tensile strength of limestone via genetic programming

Baykasoğlu, Adil; Güllü, Hamza; Çanakçı, Hanifi; Özbakır, Lale

doi:10.1016/j.eswa.2007.06.006

Cited by 287 publications

(91 citation statements)

References 14 publications

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“…Köprüde kullanılan yığma taş hakkında deneysel bir çalışma yapılamamıştır. Bu yüzden, taş malzemenin mekanik özellikleri jeolojik formasyon [23] ve literatürdeki kaynaklardan [16][17][18][19][24][25] faydalanılarak, taşın genelde kullanılan malzeme özellikleri dikkate alınarak belirlenmiştir. Buna göre elastisite modülü (Young modül) 3500MPa, basınç mukavemeti 20MPa, çekme mukavemeti ise Pela [16] çalışmasına bağlı olarak basınç mukavemetinin %5'i olan 1MPa kabul edilmiştir.…”

Section: şEkil 1 Adıyaman Cendere Köprüsü Genel Görünüşüunclassified

Tari̇hi̇ Yiğma Yapili Cendere Köprüsünün Deprem Etki̇si̇ni̇n İncelenmesi̇

Güllü¹

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZBu çalışmada, tarihi yığma yapılı kemer formlu Cendere köprüsünün üç boyutlu sayısal modeli oluşturularak deprem etkisindeki davranışı incelenmiştir. Sonlu elemanlar modeli katı eleman kullanılarak, yapının genel davranışını modelleyen homojen tek bir malzeme kabulü ile oluşturulmuştur. Deprem etkisi, zaman-tanım analizi uygulanarak lineer elastik davranış modeline göre araştırılmıştır. Analizlerde, bölgesel sismisiteyi temsil eden değişik senaryo depremlerine ait kuvvetli yer hareketi kayıtları kullanılmış ve sismik değerlendirmeler için en olumsuz tepkilerin elde edildiği deprem kaydı dikkate alınmıştır. Araştırmada elde edilen bulgular, deprem etkisinde yığma yapının çekme dayanımının kemer bölgesinde aşılabileceğini, rezonans oluşabileceğini ve yüksek spektral büyütmelerin olabileceğini ortaya koymuştur. Sonuçlar, olası bir deprem durumunda köprünün hasar açısından risk taşıdığına dikkat çekmektedir.Anahtar Kelimeler: Tarihi yığma kemer köprü, sonlu elemanlar, deprem, zaman-tanım analizi, lineer elastik model INVESTIGATION OF EARTHQUAKE EFFECT OF HISTORICAL MASONRY CENDERE BRIDGE ABSTRACTIn this study, a historical masonry arch bridge called Cendere Bridge was investigated under earthquake effects by building 3D finite element model of bridge. The finite element model was constructed using solid element with the assumption of homogeneous material in the structure. The earthquake response was investigated for linear elastic behavior applying time-history analysis. Different earthquake scenarios of strong ground motion records that represent the regional seismicity of bridge were employed for the earthquake responses. The earthquake record resulting in the most adverse responses was taken into account for seismic evaluations. The results indicate to the possibility of the exceedance of tensile strength of masonry stone at the arch region, resonance occurrence and high spectral amplifications under earthquake. The results of the study notice a potential of damage risk for the bridge under a possible earthquake.

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Section: şEkil 1 Adıyaman Cendere Köprüsü Genel Görünüşüunclassified

Tari̇hi̇ Yiğma Yapili Cendere Köprüsünün Deprem Etki̇si̇ni̇n İncelenmesi̇

Güllü¹

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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“…linear genetic programming) za procjenu UCS mekih vapnenaca na području Gaziantep u Turskoj. Najučinkovitiju procjenu pokazao je LGP model evolucijskog programiranja [48]. Ozbeka sa suradnicima opisao je upotrebu GEP modela za procjenu UCS bazalta i tufa te pokazao dobro slaganje između eksperimentalno utvrđenih podataka i rezultata postignutih procjenom [49].…”

Section: Procjena Pomoću Evolucijskog Programiranjaunclassified

Modeli za procjenu jednoosne tlačne čvrstoće i modula elastičnosti

Briševac¹,

Hrženjak²,

Buljan³

2016

JCE

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Modeli za procjenu jednoosne tlačne čvrstoće i modula elastičnosti U ovom radu ukratko je izložen pregled najznačajnijih metoda za procjenu jednoosne tlačne čvrstoće i Yangovog modula elastičnosti intaktnog stijenskog materijala koje su nastale u okviru mnogobrojnih istraživanja. Iznesen je prijedlog podjele metoda prema kojemu se one u osnovi mogu podijeliti na jednostavne i složene metode. Jednostavne metode uključuju različite dijagrame i tablice te primjenu jednadžbi jednostruke regresije, a složene metode uključuju primjene jednadžbi višestruke regresije, modela neizrazite logike, neuronskih mreža, evolucijskog programiranja i regresijskog stabla. Models for estimating uniaxial compressive strength and elastic modulusThe most significant methods for estimating the uniaxial compressive strength and Young's modulus of intact rock material, formulated in the scope of numerous previous studies, are briefly presented in the paper. The proposal for classification of these methods, according to which they can generally be divided into simple and complex methods, is also presented. Simple methods include various diagrams and tables and the use of simple regression equations, while complex methods comprise the use of multiple regression equations, fuzzy logic models, neural networks, evolutionary programming, and regression trees.

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“…However, it is not always possible to extract sufficient quantities of high-quality cores from weak, highly fractured, weathered and thinly bedded rocks. In addition, careful execution of this test is very difficult, time-consuming and expensive and involves destructive tests [10,28]. The prediction models for uniaxial compressive strength (UCS) of weak rocks [27,29,49,79] are common in rock mechanics literature due to the difficulties encountered during the preparation of standard cores.…”

Section: Introductionmentioning

confidence: 99%

Application of statistical methods for predicting uniaxial compressive strength of limestone rocks using nondestructive tests

Azimian

2016

Acta Geotech.

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Uniaxial compressive strength (UCS) of an intact rock is an important geotechnical parameter for engineering applications. Using standard laboratory tests to determine UCS is a difficult, expensive and time-consuming task. The main purpose of this study is to develop a general model for predicting UCS of limestone samples and to investigate the relationships among UCS, Schmidt hammer rebound and P-wave velocity (V P ). For this reason, some samples of limestone rocks were collected from the southwestern Iran. In order to evaluate a correlation, the measured and predicted values were examined utilizing simple and multivariate regression techniques. In order to check the performance of the proposed equation, coefficient of determination (R 2 ), root-mean-square error, mean absolute percentage error, variance accounts for (VAF %), Akaike Information Criterion and performance index were determined. The results showed that the proposed equation by multivariate regression could be applied effectively to predict UCS from its combinations, i.e., ultrasonic pulse velocity and Schmidt hammer hardness. The results also showed that considering high prediction performance of the models developed, they can be used to perform preliminary stages of rock engineering assessments. It was evident that such prediction studies not only provide some practical tools but also contribute to better understanding of the main controlling index parameters of UCS of rocks.Keywords Limestone Á P-wave velocity (V P ) Á Schmidt hammer rebound (SHR) Á Simple and multivariate regression Á Uniaxial compressive strength

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Prediction of compressive and tensile strength of limestone via genetic programming

Cited by 287 publications

References 14 publications

Tari̇hi̇ Yiğma Yapili Cendere Köprüsünün Deprem Etki̇si̇ni̇n İncelenmesi̇

Tari̇hi̇ Yiğma Yapili Cendere Köprüsünün Deprem Etki̇si̇ni̇n İncelenmesi̇

Modeli za procjenu jednoosne tlačne čvrstoće i modula elastičnosti

Application of statistical methods for predicting uniaxial compressive strength of limestone rocks using nondestructive tests

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