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    Geochemical constraints on the genesis of the Saricakaya intrusive rocks, Turkey: Late Paleozoic crustal melting in the central Sakarya Zone
    (Elsevier Gmbh, Urban & Fischer Verlag, 2010) Kibici, Y.; Ilbeyli, N.; Yildiz, A.; Bagci, M.
    The Sakarya Zone is intruded by several Late Paleozoic granitoids, of which the Saricakaya intrusive rocks in the central Sakarya (Eskisehir) region, is the least-studied. The Saricakaya intrusive rocks consist mainly of quartz diorite-granodiorite, granodiorite and granite. They are, geochemically, divided into two groups: diorites and granites. The former is medium-K and calc-alkaline (mainly l-type), whereas the latter is high-K to shoshonite and calcic (I-type). Typical minerals for both rock types are plagioclase, K-feldspar, quartz, biotite, hornblende and Fe-Ti oxides. Chondrite-normalized REE patterns for the Saricakaya intrusive rocks are moderately fractionated and have small negative Eu anomalies. They are enriched in LILE and LREE relative to HFSE showing characteristics of arc-related granitoids. Geochemical characteristics of the Saricakaya intrusive rocks indicate a hybrid origin through partial melting of lower crustal source rocks. (C) 2010 Elsevier GmbH. All rights reserved.
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    Numerical investigation of scale effect of shallow footings
    (2010) Ornek, M.; Laman, M.; Yildiz, A.; Demir, A.
    This study is focused on the scale effect investigation in shallow footings rested on clay and sand soils. Three dimensional numerical analyses were performed using circular, square and strip footings with different sizes. Mohr Coulomb and hardening soil models were used to simulate clay and sand behaviour, respectively. Before conducting the analyses, validity of the constitutive models was proved using laboratory and field test results performed by authors. Finally, the results obtained from the analyses were compared with the classical bearing capacity equations from the relevant literature. It is seen that there is no clear effect of footing size on N? when footing rested on clay soils, but N? is dependent on width of footing overlying sand soils. © 2010 Civil-Comp Press.
  • Küçük Resim
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    Numerical Investigation of Scale Effect of Shallow Footings
    (Civil Comp Press, 2010) Ornek, M.; Laman, M.; Yildiz, A.; Demir, A.
    This study is focused on the scale effect investigation in shallow footings rested on clay and sand soils. Three dimensional numerical analyses were performed using circular, square and strip footings with different sizes. Mohr Coulomb and hardening soil models were used to simulate clay and sand behaviour, respectively. Before conducting the analyses, validity of the constitutive models was proved using laboratory and field test results performed by authors. Finally, the results obtained from the analyses were compared with the classical bearing capacity equations from the relevant literature. It is seen that there is no clear effect of footing size on N-gamma when footing rested on clay soils, but N-gamma is dependent on width of footing overlying sand soils.