Structures Congress 2018
A Soil-Structure Interaction Procedure for the Design of Bridges on Drilled Shafts
Publication: Structures Congress 2018: Bridges, Transportation Structures, and Nonbuilding Structures
ABSTRACT
This study presents a practical way to include deep foundation elements, such as drilled shafts and soil effects (through p-y, t-z, and q-z curves), in the modeling of bridges. Superstructure, substructure, and foundations are modeled using finite elements. Shafts are supported by a collection of horizontal (p-y) and vertical (t-z) springs along pile length; at the tip of the shaft a vertical spring (q-z) is included. The incorporation of the nonlinearity of p-y, t-z, and q-z curves is solved by an iterative process using secant stiffness. Our studies have shown that this is a simple process requiring only a few iterations. These iterations are performed using linear analysis with typical finite element software in conjunction with spreadsheet processing. The procedure has been used in the analysis and design of White River Bridge an 18-span bridge in a seismic region with large scour, and for several bridges of the California High Speed Rail project where liquefaction was included. The study includes a range of foundations to incorporate both single-shaft and multi-shaft foundations, and describes a process that can also be applicable to buildings and other deep foundations.
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ACKNOWLEDGEMENT
We give special thanks to our colleagues at Jacobs and in the industry who have offered structural and geotechnical insight during the development and implementation of this method on our projects. In particular, we appreciate the help from Dr. Zhongxin Wei and Shane Rasch for their cooperation and valuable insights in the preparation of this paper on soil-structure interaction.
REFERENCES
AASHTO LRFD Bridge Design Specifications, U.S. Customary Units. Washington, DC: American Association of State Highway and Transportation Officials, 2014. Print.
American Railway Engineering and Maintenance-of-Way Association Manual for Railway Engineering. Vol. 2. Lanham, MD: n.p., 2014. Print.
Ashford, S.A., Boulanger, R.W., Brandenberg, S. J. (2011). Recommended Design Practice for Pile Foundations in Laterally Spreading Ground. Pacific Earthquake Engineering Research Center, PEER 2011/04.
Basile, F. (2010). Kinematic Bending Moments in Pile Groups. Proceedings of the 14th ECEE.
Basile, F. (2012). Pile-Group Response under Seismic Loading. Second International Conference on Performance-Based Design in Earthquake Geotechnical Engineering.
Basile, F. (2013). A practical method for the non-linear analysis of piled rafts. Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris.
CALTRANS. (2015). Bridge Design Practice. State of California Department of Transportation.
Ealy, C. D., Filz, G. M., Lesko, J. J., Pando, M.A., and Hoppe, E.J. (2006) A Laboratory and Field Study of Composite Piles for Bridge Substructures. FHWA-HRT-04-043.
Idriss, I. M., Boulanger, R. W., (2008) Soil Liquefaction During Earthquakes. Earthquake Engineering Research Institute. MNO-12.
Jefferies, M., Been, K., (2006) Soil Liquefaction. A Critical State Approach. Taylor & Francis, London and New York.
Meyer, B.J. and Reese, L.C. (1979). Analysis of Single Piles under Lateral Loading. Texas State Department of Highways and Public Transportation. FHWA/TX-79/38+244-l
Reese, L.C., Van Impe, W. (2011). Single Piles and Pile Groups under Lateral Loading. CRC Press.
Reese, L.C, Isenhower, W.M., Wang, S.T. (2006). Analysis and Design of Shallow and Deep Foundations. John Wiley & Sons, Inc.
Information & Authors
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Published In
Structures Congress 2018: Bridges, Transportation Structures, and Nonbuilding Structures
Pages: 35 - 47
Editor: James Gregory Soules, CB&I
ISBN (Online): 978-0-7844-8133-2
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Apr 17, 2018
Published in print: Apr 17, 2018
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