Elasto-plastik zemine oturan plakların elasto-plastik analizi

-In long plates (> 2L), separation from foundation is usually observed. In these types of plates, failure mechanism forms when a circumferential yield line occurs in the yield region, -At small moment values, while there is no yielding in the foundation, the plate may reach failure mechanism, -For pb=0.1 circumferential yield line radius is around 0.65L. For infinite plates, this value is approximately 0.8L, -From the first hinge, to failure mechanism, for typical plate and foundation parameters, load increments are between %100 and %300, -In the foundation elastic region, limit load increases linearly with increasing moment while separation radius, radial yield line radius and circumferential yield line radius do not change with increasing moment, -Need of upper reinforcement is obvious for plates under concentrated loads, -Although around concentrated load, radial curvatures become pozitive and at a distance from load it is negative, circumferential curvatures are always pozitive anywhere on the plate, -For plate and foundation materials, in engineering applications, yielding in the foundation does not happen, -If there is yielding in the foundation, depending on increment in load, foundation yielding region, radial yield line region and circumferential yield line radius become larger, -If there is no yielding in the foundation, depending on increment in load, concentration of the reactions occurs at the central region of the plate, -Radial and circumferential moments are equal to each other at the plate center. Radial bending moment is zero at the plate edge. Circumferential bending moment is positive anywhere on the plate, -If reinforcement ratios of the faces are different, solution may be obtained using different flexural rigidities for different regions, -With some small changes, it is possible to use equations obtained in this study for uniformly loaded plates with different boundary conditions. xvi