In general, the structure and the foundations are usually analyzed separately with dedicated software for each one. The finite elements models provide a global analysis of structure, but are heavy and complex to implement for a practicing engineer.
The objective of this study is to develop a global approach to analyze a structure on deep foundations using the structure software SAP2000. This software, very popular among structural engineers, has no particular module to model the soil. This dissertation analyzes the possibility of using nonlinear springs whose behavior is linked with p-y curves to model the effects of soil-structure interaction (SSI). In addition to the nonlinearities of the ground, SAP2000 can take into account the phenomena of plastic deformation in the structure. Thus, the global structure composed of the superstructure and the deep foundations can be analyzed in one step with consideration of soil and materials nonlinearities. Then, these results are compared with those of GROUP, software dedicated to pile groups analysis.
To begin with, the literature review presents the SSI, its effects and methods of analysis. Then, the particular case of deep foundation is more specifically detailed. Finally, the requirements of various standards and codes regarding the design of deep foundations and the SSI are discussed and analyzed.
Secondly, the modeling procedures performed in SAP2000 and GROUP are detailed. A section is dedicated to the calculation of p-y curves for different types of soil.
Thirdly, the nonlinear static analysis and a study of its various parameters are presented. The procedure to compare the results of SAP2000 with those of GROUP is also detailed.
Finally, piles’ displacements, moments and shears resulting from both software’s analysis are discussed and compared.
| Date | 5 Jun 2011 |
|---|
| Original language | French |
|---|
| Awarding Institution | - École de technologie supérieure
|
|---|
| Supervisor | Omar Chaallal (Supervisor) |
|---|
Sperber, V. (Author),
Chaallal (Supervisor),
5 Jun 2011Student thesis: Master's thesis › Master in Engineering: Construction Engineering