Deformasyonlarin analizinde, olasilik ve istatistik yontemlerini kullanan klasik yontemlerde buyu... more Deformasyonlarin analizinde, olasilik ve istatistik yontemlerini kullanan klasik yontemlerde buyuk hacimli veriler ile daha etkili sonuclar alinmaktadir. Ancak yeterli bilgi olmadigi durumlarda bu yontemler calismaz durumdadir. Bu yuzden, deformasyon analizinde sinirli sayida veri ile calisabilen sistemlere ihtiyac vardir. Gri Sistem teorisi, kucuk orneklemeye sahip ve herhangi bir dagilim ihtiyaci olmayan belirsizlikleri inceler. Bu makale, statik bir yuk altindaki celik kafes kopru uzerinde olusan deformasyonlari cok degiskenli gri tahmin yontemi kullanarak belirlemeyi amaclar. Cok degiskenli gri tahmin yontemi sistemin davranisi hakkinda yeterli deneyime sahip olmadigimizda ve sinirli sayida veriye ulastigimizda cok iyi sonuclar ureten bir yontemdir.
Wood is used in the building sector, in the construction of gangways and bridges, scaffolds, grou... more Wood is used in the building sector, in the construction of gangways and bridges, scaffolds, groundworks, building conveying systems, and in the production of the constructional components such as roofs and walls because of a diverse range of its features such as its tractablity, natural outlook, lightness and being a heat-insulator. Wooden buildings are lighter and more durable than the buildings constructed with other techniques. Earthquake security is fully ensured in the buildings constructed with the wooden framing technology. This paper aims to determine and compare the displacements of plane tree resulting from the three point bending test by using image processing based methods and comparators. It also examines the strength properties of the oven dried woods under different moisture values. An increase in the strength of the wood and a decrease in its elasticity was observed with the removal of the moisture in the wood.
This article discusses the effect of the number and distribution of points and the coordinates tr... more This article discusses the effect of the number and distribution of points and the coordinates transformation on underground mine measurements using a handheld laser scanner. The main objective of the article is to investigate the impact of the distribution and number of reference points used for the transformation to the geodetic coordinate system on the point cloud data obtained using a hand-held laser scanner. The measurements of points within the mine were taken as reference using a total stationandthe transformation process was carried out on the same point cloud data by distributing the reference points in different numbers and heights within the mine. The article concludes that the use of a sufficient number of reference points, distributed in a homogeneous and heterogeneous manner, is necessary for accurate coordinate transformation in underground mine measurements.
Grey theory is one of the methods used to study uncertainty. The uncertain systems characterized ... more Grey theory is one of the methods used to study uncertainty. The uncertain systems characterized by small sample and poor information are the study object of grey system theory. Multivariable grey prediction models are part of grey forecasting system. They are presented if there are mutual relations among the factors in the system. They believe that all the influencing factors are not independent of each other and should be regarded as a whole. In multivariable grey forecasting models, the future value of a variable is tried to be forecasted considering the other influential factors in the system. In this study, deformation consisting on the crest of a Dam is aimed to determine by using multivariable grey prediction models.
Purpose The purpose of this paper is to examine the effectiveness of the multivariable grey predi... more Purpose The purpose of this paper is to examine the effectiveness of the multivariable grey prediction model in deformation forecasting. Design/methodology/approach Deformation in a dam can be seen because of many factors but without any doubt, the most influential factor is the water level. In this study, the deformation level of a point in the Keban Dam crest has been tried to be forecasted depending on the water level by the multivariable grey model GM(1,N). Regression analysis was used to test the accuracy of the prediction results obtained using the grey prediction model. Findings The results show that there is a great consistency between the grey prediction values and the actual values, and that the GM(1,N) produces more reliable results than the regression analysis. Based on the results, it can be concluded that the GM(1,N) is a very reliable estimation model for limited data conditions. Originality/value Different from the other studies in the literature, this study investig...
Bu çalışmada amaç, kaya dolgu barajlarda su yüküne ve barajın kendi ağırlığına bağlı olarak baraj... more Bu çalışmada amaç, kaya dolgu barajlarda su yüküne ve barajın kendi ağırlığına bağlı olarak baraj kretinde oluşacak deformasyonları jeodezik ve sonlu elemanlar metodu ile belirleyip, iki metodu birbiri ile karşılaştırmaktır. Çalışma alanı olarak Altınkaya barajı seçilmiş ve baraj alanında 10 adet referans ve 10 adet obje noktasından oluşan bir jeodezik deformasyon ağı kurularak jeodezik deformasyon ölçüleri gerçekleştirilmiştir. Deterministik metot olarak sonlu elemanlar metodu kullanılmış ve baraj iki boyutlu modellenip baraj kreti deformasyonları belirlenmiştir. İki metottan elde edilen yatay ve düşey deformasyonlar birbirleri ile karşılaştırılarak sonuçlar verilmiştir. Her iki metottan elde edilen sonuçlar büyük bir yaklaşıklıkla uyuşum göstermiştir.
Deformasyonlarin analizinde, olasilik ve istatistik yontemlerini kullanan klasik yontemlerde buyu... more Deformasyonlarin analizinde, olasilik ve istatistik yontemlerini kullanan klasik yontemlerde buyuk hacimli veriler ile daha etkili sonuclar alinmaktadir. Ancak yeterli bilgi olmadigi durumlarda bu yontemler calismaz durumdadir. Bu yuzden, deformasyon analizinde sinirli sayida veri ile calisabilen sistemlere ihtiyac vardir. Gri Sistem teorisi, kucuk orneklemeye sahip ve herhangi bir dagilim ihtiyaci olmayan belirsizlikleri inceler. Bu makale, statik bir yuk altindaki celik kafes kopru uzerinde olusan deformasyonlari cok degiskenli gri tahmin yontemi kullanarak belirlemeyi amaclar. Cok degiskenli gri tahmin yontemi sistemin davranisi hakkinda yeterli deneyime sahip olmadigimizda ve sinirli sayida veriye ulastigimizda cok iyi sonuclar ureten bir yontemdir.
Wood is used in the building sector, in the construction of gangways and bridges, scaffolds, grou... more Wood is used in the building sector, in the construction of gangways and bridges, scaffolds, groundworks, building conveying systems, and in the production of the constructional components such as roofs and walls because of a diverse range of its features such as its tractablity, natural outlook, lightness and being a heat-insulator. Wooden buildings are lighter and more durable than the buildings constructed with other techniques. Earthquake security is fully ensured in the buildings constructed with the wooden framing technology. This paper aims to determine and compare the displacements of plane tree resulting from the three point bending test by using image processing based methods and comparators. It also examines the strength properties of the oven dried woods under different moisture values. An increase in the strength of the wood and a decrease in its elasticity was observed with the removal of the moisture in the wood.
This article discusses the effect of the number and distribution of points and the coordinates tr... more This article discusses the effect of the number and distribution of points and the coordinates transformation on underground mine measurements using a handheld laser scanner. The main objective of the article is to investigate the impact of the distribution and number of reference points used for the transformation to the geodetic coordinate system on the point cloud data obtained using a hand-held laser scanner. The measurements of points within the mine were taken as reference using a total stationandthe transformation process was carried out on the same point cloud data by distributing the reference points in different numbers and heights within the mine. The article concludes that the use of a sufficient number of reference points, distributed in a homogeneous and heterogeneous manner, is necessary for accurate coordinate transformation in underground mine measurements.
Grey theory is one of the methods used to study uncertainty. The uncertain systems characterized ... more Grey theory is one of the methods used to study uncertainty. The uncertain systems characterized by small sample and poor information are the study object of grey system theory. Multivariable grey prediction models are part of grey forecasting system. They are presented if there are mutual relations among the factors in the system. They believe that all the influencing factors are not independent of each other and should be regarded as a whole. In multivariable grey forecasting models, the future value of a variable is tried to be forecasted considering the other influential factors in the system. In this study, deformation consisting on the crest of a Dam is aimed to determine by using multivariable grey prediction models.
Purpose The purpose of this paper is to examine the effectiveness of the multivariable grey predi... more Purpose The purpose of this paper is to examine the effectiveness of the multivariable grey prediction model in deformation forecasting. Design/methodology/approach Deformation in a dam can be seen because of many factors but without any doubt, the most influential factor is the water level. In this study, the deformation level of a point in the Keban Dam crest has been tried to be forecasted depending on the water level by the multivariable grey model GM(1,N). Regression analysis was used to test the accuracy of the prediction results obtained using the grey prediction model. Findings The results show that there is a great consistency between the grey prediction values and the actual values, and that the GM(1,N) produces more reliable results than the regression analysis. Based on the results, it can be concluded that the GM(1,N) is a very reliable estimation model for limited data conditions. Originality/value Different from the other studies in the literature, this study investig...
Bu çalışmada amaç, kaya dolgu barajlarda su yüküne ve barajın kendi ağırlığına bağlı olarak baraj... more Bu çalışmada amaç, kaya dolgu barajlarda su yüküne ve barajın kendi ağırlığına bağlı olarak baraj kretinde oluşacak deformasyonları jeodezik ve sonlu elemanlar metodu ile belirleyip, iki metodu birbiri ile karşılaştırmaktır. Çalışma alanı olarak Altınkaya barajı seçilmiş ve baraj alanında 10 adet referans ve 10 adet obje noktasından oluşan bir jeodezik deformasyon ağı kurularak jeodezik deformasyon ölçüleri gerçekleştirilmiştir. Deterministik metot olarak sonlu elemanlar metodu kullanılmış ve baraj iki boyutlu modellenip baraj kreti deformasyonları belirlenmiştir. İki metottan elde edilen yatay ve düşey deformasyonlar birbirleri ile karşılaştırılarak sonuçlar verilmiştir. Her iki metottan elde edilen sonuçlar büyük bir yaklaşıklıkla uyuşum göstermiştir.
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