Robust Design of Road-Sign Structure Footing in Face of Uncertainties
Publication: IFCEE 2021
ABSTRACT
In the U.S., there are tens of thousands of road sign structures, mostly designed following the load and resistance factor design (LRFD) specifications for structural supports for highway signs, luminaires, and traffic signals (AASHTO LTS). However, due to the soil investigation being expensive and given the fact that soil investigation is not usually done prior to sign installation, subsurface soil properties are usually based on conservative engineering judgment. This estimation of soil property could lead to an uncertain system response of these structures and/or a costly over-design. Even with LRFD, the need to reduce the variation in the predicted performance of the system under applied loads is still apparent as many of the road-sign structure foundations are over-designed. In the recent years, the robust geotechnical design (RGD) methodology is developed to derive an optimal design through a careful adjustment of the design parameters so that the response of the designed system is insensitive to the variation of uncertain soil parameters (robust) while being cost efficient. This paper adopts RGD methodology for design of a footing for a road-sign structure to explore effects of inherent spatial variabilities on the design.
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REFERENCES
AASHTO. (2013). Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. American Association of State Highway and Transportation Officials, Washington, DC.
AASHTO. (2014). LRFD Bridge Design Specifications, 2014. American Association of State Highway and Transportation Officials, Washington, DC.
Branke, J., Deb, K., Dierolf, H., and Osswald, M. (2004). “Finding knees in multi-objective optimization.” In Parallel Problem Solving from Nature-PPSN VIII (pp.722-731). Springer Berlin Heidelberg.
Deb, K. (2001). Multi-objective Optimization Using Evolutionary Algorithms. John Wiley and Sons, New York.
Deb, K., and Gupta, S. (2011). “Understanding knee points in bicriteria problems and their implications as preferred solution principles.” Engineering Optimization; 43(11): 1175-204.
Gong, W., Khoshnevisan, S., and Juang, C. H. (2014). Gradient-based design robustness measure for robust geotechnical design. Canadian Geotechnical Journal, 51(11), 1331-1342.
Richard, E. G. (1980). Introduction to rock mechanics. TA706. G, 65, 1989.
Honjo, Y., and Amatya, S. (2005). Partial factors calibration based on reliability analyses for square footings on granular soils. Géotechnique, 55(6), 479-491.
Juang, C. H., Wang, L., Hsieh, H. S., and Atamturktur, S. (2014). Robust geotechnical design of braced excavations in clays. Structural Safety, 49, 37-44.
Juang, C. H., Wang, L., Liu, Z., Ravichandran, N., Huang, H., and Zhang, J. (2013). Robust geotechnical design of drilled shafts in sand: New design perspective. Journal of Geotechnical and Geoenvironmental Engineering, 139(12), 2007-2019.
Khoshnevisan, S., Gong, W., Juang, C. H., and Atamturktur, S. (2015). Efficient robust geotechnical design of drilled shafts in clay using a spreadsheet. Journal of Geotechnical and Geoenvironmental Engineering, 141(2), 04014092.
Liang, Robert, and Fan, Haijian (2016). Performance Based Design of Laterally Loaded Drilled Shafts, Ohio LATP Center.
Low, B. K. (2005). Reliability-based design applied to retaining walls. Geotechnique, 55(1), 63-75.
Meyerhof, G. G. (1976). Bearing capacity and settlement of piled foundations. ASCE. Journal of Geotechnical.
Najjar, S. S., and Gilbert, R. B. (2009). Importance of lower-bound capacities in the design of deep foundations. Journal of Geotechnical and Geoenvironmental Engineering, 135(7), 890-900.
Phadke, M. S. (1995). Quality engineering using robust design. Prentice Hall PTR.
Phoon, K. K., Kulhawy, F. H., and Grigoriu, M. D. (2003). Development of a reliability-based design framework for transmission line structure foundations. Journal of Geotechnical and Geoenvironmental Engineering, 129(9), 798-806.
Reese, L. C., Wang, S. T., Isenhower, W. M., and Arrellaga, J. A. (2004). Computer program Lpile plus version 5.0 technical manual. Ensoft: Austin, TX, USA.
Stuedlein, A. W., Neely, W. J., and Gurtowski, T. M. (2012). Reliability-based design of augered cast-in-place piles in granular soils. Journal of geotechnical and Geoenvironmental Engineering, 138(6), 709-717.
Wyllie, D. C., and Norrish, N. I. (1996). Rock strength properties and their measurement. TRB Special Report, 247, 372-390.
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IFCEE 2021
Pages: 266 - 273
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© 2021 American Society of Civil Engineers.
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Published online: May 6, 2021
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