The Experts below are selected from a list of 6231 Experts worldwide ranked by ideXlab platform
L. Lin - One of the best experts on this subject based on the ideXlab platform.
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Static and dynamic analysis of tall tube-in-tube structures by finite story method
Engineering Structures, 1996Co-Authors: O. A. Pekau, L. Lin, Z.a. ZielinskiAbstract:The finite story method, based on Nodal Displacement fields developed previously, is extended herein for approximate three-dimensional analysis of tall building tube-in-tube structures. The core tube in each story is modeled as a thin-walled beam element and represented by its extended stiffness matrix. Reliable solutions for core tube torsional deformation, bimoments and warping stresses are first obtained with this simplification for core tube analysis. The finite story method is then applied to obtain Displacements, natural frequencies and modes of vibration for both symmetric and asymmetric tube-in-tube structures. The numerical results compare favorably with other solutions, including full finite element modeling, and demonstrate the high efficiency and acceptable accuracy of the method.
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Displacement and natural frequencies of tall building structures by finite story method
Computers & Structures, 1995Co-Authors: O. A. Pekau, Z.a. Zielinski, L. LinAbstract:Abstract An approximate approach, termed finite story method (FSM), is proposed for the analysis of tall building structures under lateral loads. The method is based on Nodal Displacement fields obtained from two-story substructures and intended to approximate shear, bending and torsion components of global deformations. Because floor slabs are considered in-plane rigid, these deformations are described by translational and rotational Displacements of the slabs. Thus, Nodal Displacements are obtained by interpolating the floor slab Displacements, where the interpolation coefficients come from the Nodal Displacement fields. The latter represent deformation patterns corresponding to unit relative floor slab Displacements of the two-story substructures. By introducing this interpolation, the overall structural analysis is simplified to only five principal unknowns per floor. The efficiency and accuracy of the method are demonstrated for static and dynamic examples by comparing the results with standard three-dimensional finite element analysis.
O. A. Pekau - One of the best experts on this subject based on the ideXlab platform.
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Static and dynamic analysis of tall tube-in-tube structures by finite story method
Engineering Structures, 1996Co-Authors: O. A. Pekau, L. Lin, Z.a. ZielinskiAbstract:The finite story method, based on Nodal Displacement fields developed previously, is extended herein for approximate three-dimensional analysis of tall building tube-in-tube structures. The core tube in each story is modeled as a thin-walled beam element and represented by its extended stiffness matrix. Reliable solutions for core tube torsional deformation, bimoments and warping stresses are first obtained with this simplification for core tube analysis. The finite story method is then applied to obtain Displacements, natural frequencies and modes of vibration for both symmetric and asymmetric tube-in-tube structures. The numerical results compare favorably with other solutions, including full finite element modeling, and demonstrate the high efficiency and acceptable accuracy of the method.
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Displacement and natural frequencies of tall building structures by finite story method
Computers & Structures, 1995Co-Authors: O. A. Pekau, Z.a. Zielinski, L. LinAbstract:Abstract An approximate approach, termed finite story method (FSM), is proposed for the analysis of tall building structures under lateral loads. The method is based on Nodal Displacement fields obtained from two-story substructures and intended to approximate shear, bending and torsion components of global deformations. Because floor slabs are considered in-plane rigid, these deformations are described by translational and rotational Displacements of the slabs. Thus, Nodal Displacements are obtained by interpolating the floor slab Displacements, where the interpolation coefficients come from the Nodal Displacement fields. The latter represent deformation patterns corresponding to unit relative floor slab Displacements of the two-story substructures. By introducing this interpolation, the overall structural analysis is simplified to only five principal unknowns per floor. The efficiency and accuracy of the method are demonstrated for static and dynamic examples by comparing the results with standard three-dimensional finite element analysis.
Z.a. Zielinski - One of the best experts on this subject based on the ideXlab platform.
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Static and dynamic analysis of tall tube-in-tube structures by finite story method
Engineering Structures, 1996Co-Authors: O. A. Pekau, L. Lin, Z.a. ZielinskiAbstract:The finite story method, based on Nodal Displacement fields developed previously, is extended herein for approximate three-dimensional analysis of tall building tube-in-tube structures. The core tube in each story is modeled as a thin-walled beam element and represented by its extended stiffness matrix. Reliable solutions for core tube torsional deformation, bimoments and warping stresses are first obtained with this simplification for core tube analysis. The finite story method is then applied to obtain Displacements, natural frequencies and modes of vibration for both symmetric and asymmetric tube-in-tube structures. The numerical results compare favorably with other solutions, including full finite element modeling, and demonstrate the high efficiency and acceptable accuracy of the method.
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Displacement and natural frequencies of tall building structures by finite story method
Computers & Structures, 1995Co-Authors: O. A. Pekau, Z.a. Zielinski, L. LinAbstract:Abstract An approximate approach, termed finite story method (FSM), is proposed for the analysis of tall building structures under lateral loads. The method is based on Nodal Displacement fields obtained from two-story substructures and intended to approximate shear, bending and torsion components of global deformations. Because floor slabs are considered in-plane rigid, these deformations are described by translational and rotational Displacements of the slabs. Thus, Nodal Displacements are obtained by interpolating the floor slab Displacements, where the interpolation coefficients come from the Nodal Displacement fields. The latter represent deformation patterns corresponding to unit relative floor slab Displacements of the two-story substructures. By introducing this interpolation, the overall structural analysis is simplified to only five principal unknowns per floor. The efficiency and accuracy of the method are demonstrated for static and dynamic examples by comparing the results with standard three-dimensional finite element analysis.
H. B. Raghavendra - One of the best experts on this subject based on the ideXlab platform.
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Analysis of soil-reinforcement interaction in reinforced soil beds
Proceedings of the Institution of Civil Engineers - Ground Improvement, 2008Co-Authors: H. B. RaghavendraAbstract:A reinforced soil bed is a composite material composed of stiffer materials called ‘reinforcement’ embedded in the soil bed. Reinforcement inclusion in a soil bed results in a significant improvement in the bearing capacity and in reduced settlement. As a result, soil reinforced with strips, fabrics, sheets, grids and cells has become commonplace. Research is being carried out worldwide to study the effect of reinforcing elements in soil beds. The current paper describes an attempt to understand the soil-reinforcement interaction in soil beds that carry footing. The aim of the present study is to understand the changes brought about by the inclusion of reinforcement inside the soil system in terms of altered stresses and Displacements at different increments of loading. The investigation uses the finite-element technique for the analysis and consists of a study of: (a) Nodal Displacement vectors, (b) deformed meshes and (c) failure initiation and progression. Based on the results of the above analysis, an...
M Tarfaoui - One of the best experts on this subject based on the ideXlab platform.
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the identification of structurally sensitive zones subject to failure in a wind turbine blade using Nodal Displacement based finite element sub modeling
Renewable Energy, 2016Co-Authors: Owaisur Rahman Shah, M TarfaouiAbstract:The wind turbine blades are complex structures in terms of their geometry and the materials used. They need to be modeled, on the one hand as accurately and precisely as possible, while on the other hand the models should be light enough to be run in a reasonable amount of time using reasonable computational resources. Sub-modeling is a technique used to reduce the domain size of a finite element model to a more manageable size. One of the motivations behind sub-modeling is the capacity to develop highly refined and detailed models, without using increased computational resources, as the refined model domain is small and hence has a smaller number of elements. There are different methods of sub dividing the problem domain into smaller simpler domains, of which the transfer of Nodal Displacement form one parent model to its child will be used in this study. Furthermore the use of surface to solid sub-models is also discussed.