Yazar "Laman, Mustafa" seçeneğine göre listele

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    Estimating the bearing capacity of single reinforced granular fill overlying clay
    (Elsevier Sci Ltd, 2018) Mısır, Gizem; Laman, Mustafa
    This paper develops an empirical design approach for estimating the footing pressure and settlement behavior of a circular footing on a geogrid reinforced granular fill overlying a weak clay soil by regression analysis. A power model has been developed with a high coefficient of determination R-2 with 0.959, according to the 398 training data obtained from in-situ tests. The empirical formulation has been evaluated for the validity of the regression model with 220 data which were not used in the derivation of the formulation and the mean absolute percentage error values have been demonstrated that the predictions were obtained with less than 10% error, on average. Additionally, the validity of the developed formulation has been confirmed with different plate load test results from literature, with an acceptable convergence.
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    Experimental investigation of lateral load bearing capacity of short battered piles
    (Turkish Chamber Civil Engineers, 2017) Mısır, Gizem; Laman, Mustafa
    In this study, a short single pile in homogeneous loose sand environment placed vertically and also obliquely that is under the influence of lateral loading, was investigated by small-scale laboratory model tests. The lateral bearing capacity of the short pile was obtained from the experimental study. In addition; the depth of the pivot point, that is expected to occur in the rigid pile was discussed as one of the main parameters affecting the lateral load capacity of the short pile. As a result, the ground soil conditions surrounding the pile, considerably affects the lateral load-bearing capacity of the pile. However, the depth of the rotation point and the lateral load capacity of the short pile placed obliquely in the sand, reveal significant differences as compared to vertical piles.
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    A modern approach to estimate the bearing capacity of layered soil
    (Budapest Univ Technology Economics, 2017) Mısır, Gizem; Laman, Mustafa
    This study is concerned with the bearing capacity of circular footings on a granular fill layer above a soft clay soil. The results of an extensive series of laboratory and field tests were used to define an empirical equation. This is generally done by estimating the dependent variable (e.g. bearing capacity) based on the independent variables (e.g. granular fill layer thickness, soil and footing parameters and settlement ratio). A logarithmic model has been developed by using regression analysis to estimate the bearing capacity of a circular footing resting on granular fill at any settlement ratio, using all possible regression techniques based on 342 field test data, to select the significant subset of the predictors. The results indicate that the logarithmic model serves a simple and reliable tool to predict the bearing capacity of circular footings placed on a granular fill with different thicknesses above a soft clay soil. And also, the validity of the developed formulation was verified with different plate load test results from literature.
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    Numerical analysis of laterally loaded battered rigid piles
    (Turkish Chamber Civil Engineers, 2019) Mısır, Gizem; Laman, Mustafa
    The short pile pulling capacity under the lateral load was investigated by both laboratory model tests and numerical analysis in the case of vertical/inclined placement in homogeneous/layered sandy soils. Firstly, the problem was analyzed in 3-dimensional form and then it was investigated whether the problem could be reduced to 2-dimensional condition. For this purpose, the problem of a rigid pile under a single lateral load was transformed into a rigid wall problem under a strip load. The difference which occurred because of the dimensional variation of the problem between the results of the experimental studies and the results of 2-D numerical analysis was overcome by using constant coefficients. With the 2-D reduction approach of a 3-D problem, which was used for the first time in the field of geotechnical engineering, results were obtained with acceptable accuracy.
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    Numerical modelling of full-scale lateral load test
    (2020) Mısır, Gizem; Laman, Mustafa
    Ports are very important structures at the national and international sea transportation. These structures are also in a critical position on economy and commerce capacity by providing shipping and distribution services. It is very important to design a port structure, considering its stability and resistance along its service time. In the design of this type of structure, the lateral loads caused by during ship berthing, wind and wave loads etc. can be more important compared with vertical loads. The design and the performance of a port structure foundation should be investigated by full scale field tests considering the service loads. The aim of this study is to investigate the performance of the steel pipe pile under lateral load by full scale in-situ loading tests at Mersin International Port Construction area in the Mediterranean Sea. Full scale pile lateral loading test (PLLT) on a single offshore pile has been conducted at the project site and the test pile has been loaded up to 2 times the service load with 4 loading-unloading cycles. In addition, a numerical analysis has been performed to simulate the real lateral load-deflection behavior by using Plaxis 3D finite element software. It has been observed that, the analysis results obtained from the numerical model has been reflected the test pile lateral loaddisplacement behavior with good convergence.