Finite Element Analyses of Cracked Cooling Tower Shell
Publication: Journal of Structural Engineering
Volume 117, Issue 9
Abstract
The limit of serviceability and the residual safety against structural collapse of a concrete cooling tower, which was built 25 years ago, is evaluated numerically by the finite element method. The present condition of the shell includes a relatively large number of long meridional cracks. The process of damage is simulated by means of applying different thermal load histories. Each of them is followed by the incremental application of the wind load. For purposes of comparison, results from ultimate (wind) load analysis of the originally uncracked shell are presented. From the analyses it is concluded that the degree of corrosion, for which several assumptions are made, controls the safety of the cooling tower. With respect to the sensitivity of the structural response concerning the value of the tensile strength, the effectiveness of a repair by attaching stiffening rings to the shell and the influence of the location of a single ring on the structural response also are investigated.
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References
1.
Berra, M., Bettinali, F., and Fatticcioni, A. (1989). “Survey and analysis of an old Italian cooling tower.” Proc., Third Int. Symp. on Natural Draught Cooling Towers, Alsthom Establissement SCAM, Paris, France, 359–368.
2.
Bosman, P. B. (1989). “Repairs to two severely cracked cooling tower shells using stiffening rings.” Proc., Third Int. Symp. on Natural Draught Cooling Towers, Alsthom Etablissement SCAM, Paris, France, 381–399.
3.
Cedolin, L., and Dei Poli, S. (1977). “Finite element studies of shear‐critical R/C beams.” J. Engrg. Mech. Div., ASCE, 103(3), 395–410.
4.
Crisfield, M. A., and Wills, J. (1987). “Numerical comparisons involving different ‘concrete models.’” Colloquium on Computational Mechanics of Concrete Structures, IABSE Report Vol. 54, Int. Assoc. for Bridge and Struct. Engrg., 177–187.
5.
Dahlblom, O., and Ottosen, N. S. (1990). “Smeared crack analysis using generalized fictitious crack model.” J. Engrg. Mech., ASCE, 116(1), 55–76.
6.
Form, J. (1986). “The ring‐stiffened shell of the ISAR II nuclear power plant naturaldraught cooling tower.” Engrg. Struct., 8(3), 199–207.
7.
Gould, P. L., and Guedelhoefer, O. C., (1989). “Repair and completion of damaged cooling tower.” J. Struct. Engrg., ASCE, 115 (3), 576–593.
8.
Mang, H. A. (1990). “Fulfilled and unfulfilled expectations: A review of a decade of nonlinear FE analysis of reinforced concrete and prestressed concrete structures at Technical University of Vienna.” Proc., Second Int. Conf. on Computer Aided Analysis and Design of Concrete Structures, 2, N. Bićanić, and H. A. Mang, eds., Pineridge Press, Swansea, U.K., 1283–1309.
9.
Mang, H. A., Floegl, H., Trappel, F., and Walter, H., (1983). “Wind‐loaded rein‐forced‐concrete cooling towers: Buckling or ultimate load?” Engrg. Struct., 5 (3), 163–180.
10.
MARC general purpose finite element program, Vol. B, element library. (1988). Rev. K.3, MARC Analysis Research Corporation, Palo Alto, Calif.
11.
Milford, R. V., and Schnobrich, W. C. (1984). “The effect of cracking on the ultimate load of reinforced concrete cooling towers.” Proc., Second Int. Symp. on Natural Draught Cooling Towers, P. L. Gould, W. B. Krätzig, I. Mungan, and U. Wittek, eds., Springer Verlag, Berlin, Germany, 319–332.
12.
Milford, R. V., and Schnobrich, W. C. (1985). “Numerical model for cracked reinforced concrete.” Proc., Int. Conf. on Computer Aided Analysis and Design of Concrete Structures, 1, F. Damjanić, E. Hinton, D. R. J. Owen, N. Bićanić, and V. Simović, eds., Pineridge Press, Swansea, U.K., 71–84.
13.
Moll, H. L. (1964). “Über die Korrosion von Stahl im Beton.” Deutscher Ausschuβ für Stahlbeton, Heft 169, Berlin, Germany (in German).
14.
Ottosen, N. S. (1986). “Thermodynamic consequences of strain softening in tension.” J. Engrg. Mech., ASCE, 112(11), 1152–1164.
15.
VGB—Rules for design and construction. (1980). “Bautechnische Richtlinien.” Bau‐technik bei Kühltürmen, Part 2, VGB‐Kraftwerkstechnik Gmbh, Essen, Germany (in German).
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 117 • Issue 9 • September 1991
Pages: 2620 - 2638
Copyright
Copyright © 1991 ASCE.
History
Published online: Sep 1, 1991
Published in print: Sep 1991
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