Estimation of Error Factors in Concrete Cable-Stayed Structures with Sensitivity of Creep
Publication: Journal of Structural Engineering
Volume 137, Issue 12
Abstract
This study proposes a method for estimating the properties of concrete creep and the unstrained length of cable, by using measured displacements and cable tension forces, in a concrete cable-stayed structure over time. The method is proposed on the basis of minimizing the differences between the actual measured responses of the structure and the predicted values that were calculated by using finite element analysis. The creep model uncertainty factor was introduced to characterize the incompleteness or inadequacy of the deterministic formulas of a given model. This factor was selected as the sole parameter to be estimated from the parameters relevant to the creep model. The numerical examples used in this analysis revealed good feasibility of this methodology for parameter estimation. These examples also supported the importance of considering concrete creep properties as a structural error factor in concrete cable-stayed structures. The estimated concrete creep properties may be used to reduce the long-term error associated with concrete creep in concrete cable-stayed structures.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was supported by a grant (UNSPECIFIED09CCTI-A052531-02-000000) from the Ministry of Land, Transport and Maritime of the Korean government through the Core Research Institute at Seoul National University for Core Engineering Technology Development of Super Long Span Bridge R&D Center.
References
American Concrete Institute (ACI) Committee 209. (1978). “Prediction of creep, shrinkage, and temperature effects in concrete structures.” American Concrete Institute, 2nd Draft, Detroit.
American Concrete Institute (ACI) Committee 209. (1992). “Prediction of creep, shrinkage and temperature effects in concrete structures.” American Concrete Institute, SP-70, Detroit.
Banan, M. R., and Hjelmstad, K. D. (1994). “Parameter estimation of structures from static response. I. Computational aspects.” J. Struct. Eng., 120(11), 3243–3258.
Bazant, Z. P., and Baweja, S. (1995). “Justification and refinement of Model B3 for concrete creep and shrinkage. I: Statistics and sensitivity.” Mater. Struct., 28, 415–430.
Bazant, Z. P., and Liu, K. L. (1985). “Random creep and shrinkage in structures: Sampling.” J. Struct. Eng., 111(5), 1113–1134.
Bazant, Z. P., and Panula, L. (1978). “Simplified prediction of concrete creep and shrinkage from strength and mix.” Structural Engineering Rep. No. 78-10/6405, Dept. of Civil Engineering, Northwestern Univ., Evanston, IL.
Bazant, Z. P., and Wittmann, F. H. (1982). Creep and shrinkage in concrete structures, Wiley, New York, 184.
Bazant, Z. P., and Wu, S. T. (1973). “Dirichlet series creep function for aging concrete.” J. Eng. Mech., 99(EM2), 367–387.
Chang, S. P., Park, J. I., and Lee, K. C. (2008). “Nonlinear dynamic analysis of spatially suspended elastic catenary cable with finite element method.” KSCE J Civ. Eng., 12(2), 121–128.
Cluley, N. C., and Shepherd, R. (1996). “Analysis of concrete cable-stayed bridges for creep, shrinkage and relaxation effects.” Comput. Struct., 58(2), 337–350.
Comité Européen du Béton-Fédération Internationale de la Précontrainte (CEB-FIP) (1970). International recommendations for the design and construction of concrete structures—Principles and recommendations, Cement and Concrete Association, London.
Comité Européen du Béton-Fédération Internationale de la Précontrainte (CEB-FIP) (1978). Model code for concrete structures, Parìs.
Comité Européen du Béton—Fédération Internationale de la Précontrainte (CEB-FIP) (1990). Model code for concrete structures, Parìs.
Concrete Society (1978). “A simplified method for estimating the elastic modulus and creep of normal weight concrete.” Training Centre Publication No. TDH-7376, Cement and Concrete Association, London.
Furuta, H., Kawamura, Y., Arimura, H., and Takase, K. (2000). “Cable tension control of Tsuneyoshi Bridge using multi-objective genetic algorithm.” Proc. Structures Congress 2000, Advanced Technology in Structural Engineering, ASCE, Reston, VA.
Goodyear, D., and Smith, M. J. (1988). “A practical look at creep and shrinkage in bridge design.” PCI J., 33(3), 108–121.
Irvine, H. M. (1981). Cable structures, MIT Press, Cambridge, MA.
Janjic, D., Pircher, M., and Pricher, H. (2003). “Optimization of cable tensioning in cable-stayed bridges.” J. Bridge Eng., 8(3), 131–137.
Kasuga, A., Arai, H., Breen, J. E., and Furukawa, K. (1995). “Optimum cable-force adjustments in concrete cable-stayed bridges.” J. Struct. Eng., 121(4), 685–694.
Ketchum, M. A., and Scordelis, A. C. (1986). “Redistribution of stresses in segmentally erected prestressed concrete bridges.” Rep. No. UCBSESM-86/07, Univ. of California, Berkeley.
Madsen, H. O., and Bazant, Z. P. (1983). “Uncertainty analysis of creep and shrinkage effects in concrete structures.” J. Am. Concr. Inst., 80(2), 116–127.
Neville, A. M., Dilger, W. H., and Brooks, J. J. (1982). Creep of plain and structural concrete, Construction Press, London.
Oh, B. H., and Yang, I. H. (2000). “Sensitivity analysis of time-dependent behavior in PSC box girder bridges.” J. Struct. Eng., 126(2), 171–179.
Oh, B. H., and Yang, I. H. (2001). “Realistic long-term prediction of prestress forces in PSC box girder bridges.” J. Struct. Eng., 127(9), 1109–1116.
Sanayei, M., Imbaro, G. R., McClain, A. S., and Brown, L. C. (1997). “Structural model updating experimental static measurements.” J. Struct. Eng., 123(6), 792–798.
Sanayei, M., and Saletnik, J. (1996). “Parameter estimation of structures from static strain measurements. I: Formulation.” J. Struct. Eng., 122(5), 555–562.
Information & Authors
Information
Published In
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jan 2, 2010
Accepted: Feb 16, 2011
Published online: Feb 18, 2011
Published in print: Dec 1, 2011
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.