Simplified Conceptual Equation for Soil-Structure Interaction for Simple Structures Due To Vertical Loads for Practical Purposes

Discussion Committee: 
Dr. Abdul Razzaq A. Touqan /Supervisor
Dr. Mahmud M.S. Dwaikat /Co-Supervisor
Dr. Maher Amro /External Examiner
Dr. Riyad Abdel-karim/Internal Examiner
Dr. Abdul Razzaq A. Touqan /Supervisor
Dr. Mahmud M.S. Dwaikat /Co-Supervisor
Fawzi S. Abu-Aladas
The non-uniform settlements represent a big challenge for the structural engineers due to the problems caused by this phenomenon. Many cracks in the walls, columns and slabs occur due to such non-uniform settlements. These cracks range from small cracks to major cracks that may threat the safety of the building and the residents. Along the years, geotechnical engineers have developed many methods to find settlements in soil. However, these methods need certain expertise and knowledge in the properties and the conditions of soil, which many structural engineers are poor at. Therefore, and because of the importance of the soil-structure interaction, this study focuses on proposing simplified equation to estimate the settlements of soil with acceptable accuracy for practical purposes, like design or field checks. To simplify the process, the displacement will be presented as ratios and will be used as a reference for the fitted equation, where the soil settlement and the displacement of structure are assumed dependent by taking the ratios to the total displacement, which represents the summation of the soil settlement and the displacement of structure. By knowing displacement of structure and the displacement ratio, the soil settlement can be found, and vice versa. Within this thesis, the applicability of the main assumptions used in soil structure interaction will be demonstrated for simple structure of one square column and footing and simple two-span frame with identical columns and footings dimensions. The finite elements method will be used as the calculation tool for the displacements of the structure and the soil, where to assure acceptable accuracy, the soil and the structure will be simulated as multi nodded three-dimensional elements, meshed to certain dimensions that give accurate results. The equations for the displacement ratios will be fitted using the finite elements results, and the results will be discussed by conducting comparisons between the results from finite elements and the equations, in order to assess the accuracy of the equations’ results.
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