Helical piles are being used in seismic regions of the U.S. and other countries, yet there remains much confusion regarding the state of practice and building codes for this pile type. Nonetheless, it is anticipated that piles with comparatively small cross-sections and high anchoring capacity, such as helical piles, could be beneficial for seismic resistance due to their slenderness, higher damping ratios, ductility, and resistance to tip uplift. Results from the premier full-scale seismic shake table testing program on helical piles in sands will be discussed.
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Presentation Topics
- Helical Piles and Their Design Evolution
- Individual Plate Bearing Method
- Recreating Major Earthquakes During Testing
- Instrumentation, Measurements, and Calculations
- Recommendations for Future Research
Learning Objectives
- Learn the basic design methodology for helical piles under static loading.
- Discover how helical piles behave under various earthquake motions.
- Gain understanding of how helical piles behave in a group and how connection details affect behavior.
- Experience exposure to the importance of instrumentation and exhumation projects in seismic zones.
About the Presenter
Amy Cerato, Ph.D., P.E.
Cerato is the Rapp Foundation Presidential Professor of Civil Engineering at the University of Oklahoma. She researches and consults in geotechnical engineering, specifically focusing on soil support, expansive soil mitigation and foundation design in problematic soils. She is a registered professional engineer in Oklahoma. She is the author of more than 50 technical papers and the recipient of the 2009 Presidential Early Career Award for Scientists and Engineers (PECASE) and 2008 National Science Foundation CAREER award. She is a member of the DFI Helical Pile and Tiebacks Committee and the ASCE Geo-Institute Committee of Engineering Geology and Site Characterization.
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