Browsing by Subject "Soil structure interactions"

Now showing 1 - 5 of 5
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    Nonlinear pile-soil-structure interaction under transient impact loading
    (2002) Küçükarslan S.; Banerjee P.K.
    Nonlinear pile-soil-structure interaction is formulated by using finite element and boundary element methods. Thus, the main idea in using this technique is to get computationally efficient results when comparing with 3D boundary element elastodynamic formulations. Linear beam column finite elements are used to model the piles and structural elements. Numerical modeling of soil media is done by introducing a rational approximation to continuum with nonlinear interface springs along the piles. By using this mixed type of formulation, it is possible to get computationally most efficient and accurate results.
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    Inelastic analysis of pile soil structure interaction
    (Elsevier BV, 2003) Küçükarslan S.; Banerjee P.K.; Bildik N.
    In this paper, inelastic pile soil structure interaction is analyzed by using a hybrid type of numerical method. Piles and structural elements are modeled as linear finite elements and soil half space is modeled by using boundary elements. Inelastic modeling of soil media is presented by introducing a rational approximation to continuum with nonlinear interface springs along the piles. For this purpose, modified Özdemir's nonlinear model is implemented and systems of equations are coupled for piles and pile groups at interacting nodes. To verify the proposed algorithm, four experimental results from previously conducted tests under static loads are compared with those obtained from present analysis. © 2003 Elsevier Science Ltd. All rights reserved.
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    Dynamic analysis of dam-reservoir-foundation interaction in time domain
    (Springer Verlag, 2004) Küçükarslan S.
    In this paper, a time domain dynamic analysis of the dam-reservoir- foundation interaction problem is developed by coupling the dual reciprocity boundary element method (DRBEM) for the infinite reservoir and foundation domain and the finite element method for the finite dam domain. An efficient coupling procedure is formulated by using the substructuring method. Sharan's boundary condition at the far end of the infinite fluid domain is implemented. To verify the proposed scheme, numerical examples are carried out and compared with available exact solutions and finite-finite element coupling results for the problem of the dam-reservoir interaction. Finally, a complete dam-reservoir-foundation interaction problem is solved and its solution is compared with previously published results.
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    Reliability-based design approach for differential settlement of footings on cohesionless soils
    (American Society of Civil Engineers (ASCE), 2010) Akbas S.O.; Kulhawy F.H.
    A probabilistic method is presented to estimate the differential settlements of footings on cohesionless soils, considering the uncertainties in both the load capacity sides of the design equation. A random field approach is employed to characterize the inherent soil variability. This method is first compared to typical limit values from the literature to denote critical combinations of design parameters that can lead to exceedance of tolerable differential settlements. Then, reliability-based design equations are developed for the serviceability limit state (SLS) design of footings on cohesionless soils. The key parameters controlling the SLS are the allowable angular distortion, site variability, footing spacing. The results are given in a straightforward design format indicate that currently suggested deformation factors (resistance factors for SLS) equal to 1.0 are likely to be unconservative for most design situations. © 2009 ASCE.
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    Collapse mechanism estimation of a historical masonry minaret considered soil-structure interaction
    (Techno-Press, 2021) Altıok T.Y.; Demir A.
    Cultures and lifestyles of past communities can be transferred to the next generations through historical structures. Accordingly, these structures should be carefully preserved against devastating events i.e. earthquakes, wind, and fire. Seismic performances of historical structures can be determined with destructive and nondestructive methods. As destructive methods are quite difficult and complex, easier and reliable methods should be used to determine the seismic behaviors of these structures. In this study, the seismic behavior of the historical Lala Mehmet Pasha minaret is investigated by considering Soil-Structure Interaction (SSI). Dynamical properties of the minaret are experimentally obtained with the operational modal analysis (OMA) method and the initial finite element (FE) model is updated. Embedded and SSI models are generated by Abaqus, then linear (LTH) and nonlinear time history (NLTH) analyses are performed. As a result of analyses, displacements, damage, and stress distributions are obtained and interpreted. These analyses show that SSI is quite effective on the structural behavior and results obtained from the nonlinear analysis are more realistic than that of linear analysis. © 2021 Techno-Press, Ltd.