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A numerical procedure for the nonlinear analysis of reinforced concrete frames with infill walls
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Date
2005
Author
Güney, Murat Efe
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Materially non-linear analysis of reinforced concrete frame structures with infill walls requires appropriate mathematical models to be adopted for the beams and the columns as well as the infill walls. This study presents a mathematical model for frame elements based on a 3D Hermitian beam/column finite element and an equivalent strut model for the infill walls. The spread-of-plasticity approach is employed to model the material nonlinearity of the frame elements. The cross-section of the frame element is divided into triangular sub regions to evaluate the stiffness properties and the response of the element cross-section. By the help of the triangles spread over the actual area of the section, the bi-axial bending and the axial deformations are coupled in the inelastic range. A frame super-element is also formed by combining a number of frame finite elements. Two identical compression-only diagonal struts are used for modeling the infill. The equivalent geometric and material properties of the struts are determined from the geometry of the infill and the strength of the masonry units A computer code is developed using the object-oriented design paradigm and the models are implemented into this code. Efficiency and the effectiveness of the models are investigated for various cases by comparing the numerical response predictions produced by the program with those obtained from experimental studies.
Subject Keywords
Structural engineering (General)
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http://etd.lib.metu.edu.tr/upload/12606318/index.pdf
https://hdl.handle.net/11511/15244
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Graduate School of Natural and Applied Sciences, Thesis
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M. E. Güney, “A numerical procedure for the nonlinear analysis of reinforced concrete frames with infill walls,” M.S. - Master of Science, Middle East Technical University, 2005.