Analysis of Osterberg and Statnamic Axial Load Testing and Conventional Lateral Load Testing

Download or read book Analysis of Osterberg and Statnamic Axial Load Testing and Conventional Lateral Load Testing written by Myoung-Ho Kim and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The work presented is part of a project sponsored by the Florida Department of Transportation (FDOT) to suggest guidelines on the use of Osterberg and Statnamic testing for FDOT structures. The primary purpose of this thesis is to reduce Osterberg and Statnamic load test data to analyze them in terms of skin and end bearing resistances. The data from both tests are individually analyzed and compared. The combined data from both tests are also analyzed. In addition, conventional lateral load tests are back-analyzed using FB-Pier to find the tip cut-off elevation. Shafts with free head and fixed head conditions (with and without superstructure) are analyzed. A brief summary of the conclusions drawn from this research is as follows: 1. Florida limestone generally has high spatial variability horizontally and vertically. The typical range of ultimate unit skin frictions in Florida limestone is from 3 to 11 tsf. 2. Most of the Statnamic load tests studied did not develop ultimate side and end bearing resistances. 3. When shafts are installed in soft geomaterials (soft limestone), large discrepancies were observed between Statnamic and derived static forces. 4. About 80% of ultimate side friction is developed when 0.25 inches of vertical movement occurred for 4-foot diameter shafts. 5. The majority of the lateral load is transferred in the upper 7 feet of the rock socket resulting in a small displacement within the competent limestone socket.