1. Procedures Used for Dynamically Laterally Loaded Pile Tests in a Centrifuge
- Author
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LD Suits, TC Sheahan, M Hajialilue-Bonab, JL Chazelas, D Levacher, Civil Engineering faculty, University of Tabriz [Tabriz], Laboratoire central des ponts et chaussées, Laboratoire Central de Ponts et Chaussées, Morphodynamique Continentale et Côtière ( M2C ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ), Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Pier ,Engineering ,0211 other engineering and technologies ,soil-pile interaction ,02 engineering and technology ,010502 geochemistry & geophysics ,01 natural sciences ,Soil structure interaction ,Geotechnical engineering ,[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,pile testing ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,Centrifuge ,[ SDU.STU.GM ] Sciences of the Universe [physics]/Earth Sciences/Geomorphology ,dynamically loading ,business.industry ,Seismic loading ,Structural engineering ,Geotechnical Engineering and Engineering Geology ,Shock (mechanics) ,Structural load ,Pile ,business ,Dynamic testing - Abstract
Most of the experimental work carried on pile behavior on centrifuge has been limited to monotonic or cyclic loading, or both. As dynamic loads generated by shocks and earthquakes are difficult to model in centrifuge, not much work has been reported in the literature on the impact mechanism to produce shock in-flight, though seismic loads can be well simulated by in-flight shakers. A complete experimental procedure, i.e., hammering system, measurements, and test procedures, has been developed to test on centrifuge lateral impact on piles. In the first part of the paper following the test procedure, the experimental set-up is detailed from the soil preparation and piles equipment to the horizontal hammering or impact system. Innovative parts of the system such as the impact system and its monitoring are described. The second part describes the feasibility and the practice of the impact device and the adopted procedure to test on centrifuge different types of piles _jacked, cast-in, and 1 g driven_ in sand. The first series of tests are focused on the evaluation of possible errors and influences due to pile position, boundary effects, and repeatability of tests. Scale effects have been studied by carrying out a series of modeling of models tests at 40 and 60 g. In conclusion, all these preliminary centrifuge tests have demonstrated that the complete experimental set-up including the impact system and its use procedure is achieved and able to perform horizontal impacted piles tests on centrifuge.
- Published
- 2007
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