Ph.D. Tezi Görüntüleme | |||||||||||||||||||||
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| Summary: The most of engineering methods that are being used during structural analysis are realized by assuming that geometric, material characteristics and load conditions of a structure are deterministic. However, there are many uncertainties on the structural systems. Therefore, the main objective of the study is that the determination of seismic behavior of the systems connected semi rigidly and constituted composite sections with Stochastic Finite Element Method (SFEM). For that reason, the stochastic dynamic analysis of the structural systems made of steel or composite sections with fully or partially restraint connections are performed by assuming material, geometric and initial stiffness properties are random. This thesis includes four main chapters according to this scope. In the first chapter, general information helping to understand the subject, in addition, main formulations about this subject and literature review are given place. In the second chapter, the developed computer program is introduced and deterministic and stochastic analyses of the system models are analyzed because of controlling of this program. The models examined during the study and their sizes and sectional properties are also presented in this section. In the third chapter, the stochastic dynamic analyses of the systems connected fully or semi rigidly and constituted of steel or composite sections are realized with perturbation based stochastic finite element method (PSFEM) and Monte Carlo simulation (MCS) method under the seismic effects. The material, geometric and initial stiffness properties of these systems which properties are given in the second chapter are assumed to be random. The frequencies, displacements and sectional forces obtained from analyzes are investigated comparatively. In the last chapter of the study, the conclusions obtained are summarized and the suggestions for further studies are given.It is seen obviously from the study that taking into consideration of random material, geometric and stiffness properties is necessary during stochastic dynamic analysis of the systems connected semi rigidly and constituted of composite sections and PSFEM is a versatile and practical method that can be used in stochastic analysis of the structures. Key Words: Stochastic Finite Element Method, Monte Carlo Simulation Method, the Systems with Composite Sections, the Systems Connected Semi Rigidly.
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