Bildiri Koleksiyonu
https://hdl.handle.net/11421/21472
2024-03-28T22:07:59Z
2024-03-28T22:07:59Z
A stochastic model for the capacity estimation of non-seismically designed beam-column joints
Yurdakul, Özgür
Tunaboyu, O.
Routil, L.
Avşar, Ö.
https://hdl.handle.net/11421/22042
2020-08-15T20:17:38Z
2018-01-01T00:00:00Z
A stochastic model for the capacity estimation of non-seismically designed beam-column joints
Yurdakul, Özgür; Tunaboyu, O.; Routil, L.; Avşar, Ö.
An analytical model based on nonlinear fracture mechanics was employed to evaluate the shear capacity of a substandard beam-column joint retrofitted by externally applied post-tensioned bars. The strength of the reference specimen was predicted as the capacity of plain concrete under tension with microcracks in the fracture process zone smeared over a band - i.e. crack band theory. Crack minimization effects in the specimens retrofitted by post-tensioned bars were considered by strain energy stored in the bars per unit fracture surface area. Due to the inherent uncertainty in material constitutive laws, the analytical model was evolved to a stochastic level to propose a more advanced model for estimating the capacity. It is found that the experimental results were within the prominent range of Probability Density Functions (i.e. mean ± one standard deviation) of the estimated joint tensile stress
BASF Construction Chemicals;BetoTech, s.r.o.;Cervenka Consulting s.r.o.;Metrostav a.s.;Pontex Consulting Engineers, Ltd.;VALBEK-EU, a.s.; 12th fib International PhD Symposium in Civil Engineering -- 29 August 2018 through 31 August 2018 -- -- 138883
2018-01-01T00:00:00Z
3D modeling of a river type dam fish passage by CFD
Kiricci, V.
Çelik, Ahmet Ozan
https://hdl.handle.net/11421/21974
2020-02-19T19:57:57Z
2016-01-01T00:00:00Z
3D modeling of a river type dam fish passage by CFD
Kiricci, V.; Çelik, Ahmet Ozan
Computational Fluid Dynamics (CFD) models provide comprehensive information about the fluid flow around water structures. This paper discusses the CFD solution of a pool type fish passage model and evaluate the results in order to improve a fish passage structure. Numerical model is prepared and solved using a commercial CFD software ANSYS CFX. Transient, two phase, free surface simulation is performed under realistic boundary and initial conditions. Discharge and velocity distribution for each pool section of the structure are determined and compared with certain limitations. As a result of the CFD solution, geometrical improvements for the structure is suggested which are believed to provide better flow patterns suitable for fish route
AGU;ASCE;et al;EWRI;IAHR;NSF; International Conference on Fluvial Hydraulics, RIVER FLOW 2016 -- 11 July 2016 through 14 July 2016 -- -- 177969
2016-01-01T00:00:00Z
Stress - Strain characteristics of frozen silty and clayey soils
Evirgen, Burak
Tuncan, M.
Tuncan, A.
https://hdl.handle.net/11421/21975
2020-02-19T20:33:57Z
2015-01-01T00:00:00Z
Stress - Strain characteristics of frozen silty and clayey soils
Evirgen, Burak; Tuncan, M.; Tuncan, A.
Presence of ground water is a serious problem for cohesive soils in many geotechnical projects. Ground water decreases the bearing capacity of soil layer. However, water can be used as a cementitious material in case of frozen situation with artificial ground freezing. Freezing procedure of cohesive specimens takes long time than non-cohesive soils within the results of chemical binding between cohesive layers. In this study, silty and clayey cylindrical specimens, having optimum water content, are subjected to unconfined compression tests after 7, 14 and 28 days freezing periods inside the CDF-CIF freezing machine and liquid nitrogen vessel. Stress - strain behaviors and ultimate strength of specimens are determined under speedy thawing process. Effects of cohesion and freezing periods on the focused parameters are evaluated. Copyright © 2015 by the International Society of Offshore and Polar Engineers (ISOPE).
et al.;ExxonMobil;International Society of Offshore and Polar Engineers (ISOPE);POSCO;Shanghai Jiao Tong University;SK Innovation; 25th International Ocean and Polar Engineering Conference, ISOPE 2015 -- 21 June 2015 through 26 June 2015 -- -- 115564
2015-01-01T00:00:00Z
Micro-Structural Characterization of the bond strength capacity of adhesive material in the alternative of cold-formed steel frame system
Komara, I.
Wahyuni, E.
Suprobo, P.
Taşkin, K.
https://hdl.handle.net/11421/21977
2020-08-15T20:17:43Z
2019-01-01T00:00:00Z
Micro-Structural Characterization of the bond strength capacity of adhesive material in the alternative of cold-formed steel frame system
Komara, I.; Wahyuni, E.; Suprobo, P.; Taşkin, K.
The introduction of adhesive material in the structural connection of cold-formed steel (CFS) as alternative connection material has a great deal on the strength capacity of bonded joints. This paper evaluates the microstructural characterisation on CFS connection. Two different types of adhesive material, A-SK, and A-3M are taken. The experiment is made to get mechanical properties and is followed by classifying incidence x-ray diffraction (XRD) and scanning electron microscopy (SEM) to study the behaviour inside the adherence. The specimen was penetrated to classify layer surfaces, to present the structural component and to get their morphology. The result is that both materials have similar bonded joints strength capacity which meets the required standard. Quartz and calcite on A-SK are mainly located on the innermost surface separately, while A-3M mostly mixed close to the base steel. In that matter, they have been beneficial for knowing the wide variety of structural characterisation by their elemental composition phases
1st International Conference on Advanced Engineering and Technology, ICATECH 2018 -- 29 September 2018 -- -- 148410
2019-01-01T00:00:00Z