| Author: | Ha, King |
| Title: | Justification of the pile cap rigidity |
| Degree: | M.Sc. |
| Year: | 1999 |
| Subject: | Concrete piling Reinforced concrete construction Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies Department of Civil and Structural Engineering |
| Pages: | 210, [59] leaves : ill. ; 30 cm |
| Language: | English |
| Abstract: | The objective of the present study is to investigate the assumption on the rigidity of reinforced concrete pile-caps. To achieve the aim, a finite element program using 9-node Lagrangian Mindlin plate element which is suitable for both thin and thick plate is developed. Various pile-cap examples have been studied by this finite element pile-cap program for which the pile is modeled as non-linear spring. The deflection shapes and the internal forces of the pile-cap and pile reactions have been studied. The assumption of rigid pile-cap is fully studied for different pile spacing and pile-cap thickness. The background theory for plate analysis, the traditional pile-cap analysis method: beam theory and truss theory, finite element method are also discussed and compared in this report. From the present study, it can be concluded that the behavior of all the practical pile cap is flexible in nature. There is no truly rigid cap. With the cap thickness increasing, all pile loads approach to the value determined from the rigid cap analysis, but they are never equal to rigid cap analysis result. It is also found that the bending moment and shear force obtained from finite element analysis are always smaller than that determined from rigid cap assumption. Since the cost of pile cap is usually very significant, it is recommended that the design engineers should adopt finite element analysis instead of the classical design method in order to reduce the cost of foundation. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14852743.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 5.23 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/978