Capacity evaluation of statnamic tested long piles |
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| Authors: | San-Shyan Lin J L Hong Wei F Lee Y H Chang |
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| Institution: | a Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan, ROC;b Taiwan Construction Research Institute, Taipei County, Taiwan, ROC;c Diagnostic Engineering Consultants, Ltd, Taipei, Taiwan, ROC |
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| Abstract: | A procedure that uses the structural damping (SD) concept for estimating the capacity of a pile based on the Statnamic (STN) pile load test results, formerly used by the authors for short piles, is extended in this paper for the STN tested long piles. Similar to segmental unloading point method procedures for long piles, the shaft length is divided into several segments and each segment is assumed to behave as a mass of a single degree of freedom. The SD concept is then applied to each segment to consider the displacement related soil damping instead of the velocity dependent damping. Instrumented strain gauge data at different levels of the shaft are required for the interpretation method. Three case studies are presented in this paper to study the validity and applicability of the present method. The predicted results are also compared to the available test or analytical data. |
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| Keywords: | Pile capacity Statnamic pile load test Structural damping Unloading point method Segmental unloading point method |
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