Economic Design Optimization of Foundations
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 8
Abstract
A geotechnical foundation design should address at least three basic requirements: ultimate limit state (ULS), serviceability limit state (SLS), and economics. Most conventional design approaches focus on ULS and/or SLS optimization, with economics being evaluated afterwards. As an alternative, this paper develops a design approach that explicitly considers the construction economics and results in a foundation that has the minimum construction cost. This design approach is expressed as an optimization process, in which the objective is to minimize construction cost, with the design parameters and design requirements as the optimization variables and constraints, respectively. This design approach is illustrated using a spread footing example. Because construction costs vary by locale, the economically optimized designs differ regionally. Sensitivity studies on soil properties and design requirements show that, for typical spread footing designs in cohesionless soils, Young’s modulus and the effective friction angle are the key parameters. A quantitative assessment illustrates the importance of soil property variability on cost. It is also found that, for typical spread footing designs, a relatively stringent ULS requirement generally ensures fulfillment of the SLS requirement.
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Acknowledgments
The work described in this paper was supported by grants from City University of Hong Kong (Project Nos. UNSPECIFIED7002072 and UNSPECIFIED7200070).
References
Bledsoe, J. D. (1992). Successful estimating methods, R. S. Means Co., Kingston, Mass.
Castillo, E., Conejo, A. J., Pedregal, P., Garcia, R., and Alguacil, N. (2002). Building and solving mathematical programming models in engineering and science, Wiley, New York.
Coduto, D. P. (1994). Foundation design: Principles and practices, Prentice-Hall, Englewood Cliffs, N.J.
Construction Ministry of China (CMC). (1995). Standard construction cost data, No. GJD-101-95, China Planning Press, Beijing.
Davis, Langdon, and Seah Ltd. (DLS). (2006). Construction cost handbook: China and Hong Kong 2006, Hong Kong.
Federal Emergency Management Agency (FEMA). (1996). Performance base seismic design of buildings: An action plan for future studies, FEMA-283, Federal Emergency Management Agency, Washington, D.C.
Ghobarah, A. (2001). “Performance-based design in earthquake engineering: State of development.” Eng. Struct., 23(8), 878–884.
Lambe, T. W., and Whitman, R. V. (1969). Soil mechanics, Wiley, New York.
Means. (1990). Means estimating handbook, Kingston, Mass.
Means. (2006a). 2007 RS Means assemblies cost data, Kingston, Mass.
Means. (2006b). 2007 RS Means building construction cost data, Kingston, Mass.
Means. (2006c). 2007 RS Means square foot costs, Kingston, Mass.
Pedregal, P. (2003). Introduction to optimization, Springer, New York.
Phoon, K. K., and Kulhawy, F. H. (1999). “Characterization of geotechnical variability.” Can. Geotech. J., 36(4), 612–624.
Poulos, H. G., and Davis, E. H. (1974). Elastic solutions for soil and rock mechanics, Wiley, New York.
Sowers, G. F. (1979). Introductory soil mechanics and foundations: Geotechnical engineering, 4th Ed., Macmillan, New York.
Vesic, A. S. (1975). “Bearing capacity of shallow foundations.” Foundation engineering handbook, H. Winterkorn and H. Y. Fang, eds., Chap. 3, Van Nostrand Reinhold, New York.
Waier, P. R. (1993). Means unit price estimating methods: Standards and procedures for using unit price cost data, 2nd Ed., R. S. Means Co., Kingston, Mass.
Wellington, A. M. (1887). Economic theory of the location of railways, Wiley, New York.
Whitman, R. V., and Richart, F. E. (1967). “Design procedures for dynamically loaded foundations.” J. Soil Mech. and Found. Div., 93(SM6), 169–193.
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© 2008 ASCE.
History
Received: Jan 26, 2007
Accepted: Oct 29, 2007
Published online: Aug 1, 2008
Published in print: Aug 2008
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