Design of Tall Formworks by a Finite-Element Model
Publication: Journal of Construction Engineering and Management
Volume 136, Issue 7
Abstract
The design of formworks for holding fresh concrete possesses a difficult engineering challenge. Present standards assume fresh concrete to have a nonviscous fluid behavior when calculating the lateral pressure to which the formwork walls will be the subject. This paper describes a finite-element model to determine these pressures, taking into account the interaction between the fresh concrete and the formwork wall. The use of this numerical model shows that present standards may underestimate the lateral pressures that can be exerted particularly with respect to tall formworks. The paper also discusses the influence of different mechanical variables on the results returned by the proposed model. The proposed model may be of use to practicing engineers and of interest to researchers examining load distributions in formworks.
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References
Alexandridis, A., and Gardner, N. J. (1981). “Mechanical behaviour of fresh concrete.” Cem. Concr. Res., 11(3), 323–339.
American Concrete Institute. (2004). “Guide to formwork for concrete.” ACI 347-04, Farmington Hills, Mich.
Andriamanantsilavo, N. R., and Amziane, S. (2004). “Maturation of fresh cement paste within 1 to 10 m large formworks.” Cem. Concr. Res., 34(11), 2141–2152.
ANSYS 8.1 university high option manual. (2004). Ansys Inc., Canonsburg, Pa.
Arslan, M. (2002). “Effects of drainer formworks on concrete lateral pressure.” Constr. Build. Mater., 16(5), 253–259.
Arslan, M., Simsek, O., and Subasi, S. (2005). “Effects of formwork surface materials on concrete lateral pressure.” Constr. Build. Mater., 19(4), 319–325.
Bingham, E. C. (1922). Fluidity and plasticity, McGraw-Hill, New York.
Chen, W. F. (1982). Plasticity in reinforced concrete, McGraw-Hill, New York.
Chen, W. F., and Mizuno, E. (1990). Nonlinear analysis in soil mechanics, Elsevier Science, Amsterdam, The Netherlands.
CIRIA. (1985). “Concrete pressure on formwork.” Rep. No. 108, Construction Industry Research and Information Association, London.
Deutsches Institut für Normung. (1980). “Frischbetondruck auf lotrechte schalungen [Pressure of concrete on vertical formworks].” DIN 18218, Berlin (in German).
Djelal, C., Vanhove, Y., and Magnin, A. (2004). “Tribological behaviour of self compacting concrete.” Cem. Concr. Res., 34(5), 821–828.
Drucker, D. C., and Prager, W. (1952). “Soil mechanics and plastic analysis or limit design.” Q. Appl. Math., 10(2), 157–165.
Ferraris, C. F., and de Larrard, F. (1998). “Testing and modelling of fresh concrete rheology.” NISTIR 6094, Building and Fire Research Laboratory, Gaithersburg, Md.
Gallego, E., Fuentes, J. M., Ramírez, A., Navamuel, B., and Ayuga, F. (2007). “Cálculo de encofrados de gran altura mediante un modelo de elementos finitos: Estudio paramétrico.” Informes de la Construcción, 59(505), 73–81 (in Spanish).
Gardner, N. J. (1985). “Pressure of concrete on formwork.” ACI J., 82(5), 744–753.
Hanna, A., and Senouci, A. (1997). “Material cost minimization of concrete wall forms.” Build. Environ., 32(1), 57–67.
Harrison, T. A. (1983). “Form pressures: Theory and field measurements.” ACI Concrete International, 5(12), 23–28.
Herschel, W. H., and Bulkley, R. (1926). “Measurement of consistency as applied to rubber-benzene solutions.” Proc. of the American Society for Testing Materials, Vol. 26, ASTM, West Conshohocken, Pa., 621–633.
Huang, Y. L., Chen, W. F., Chen, H. J., Yen, T., Kao, Y. G., and Lin, C. Q. (2000). “A monitoring method for scaffold-frame shoring systems for elevated concrete formwork.” Comput. Struct., 78(5), 681–690.
Kajewski, S. L. (2005). “Multilevel formwork load distribution with posttensioned slabs.” J. Constr. Eng. Manage., 131(2), 203–210.
Krauß, M., and Hariri, K. (2006). “Determination of initial degree of hydration for improvement of early-age properties concrete using ultrasonic wave propagation.” Cem. Concr. Compos., 28(4), 299–306.
L’Hermite, R. (1949). “Vibration and the rheology of freshly mixed concrete.” Revue des Materiaux de Construction, 1(405), 179–187.
Lubarda, V. A. (2002). Elastoplasticity theory, CRC, Boca Raton, Fla.
Murata, J., and Kukawa, H. (1992). “Viscosity equation for fresh concrete.” ACI Mater. J., 89(3), 230–237.
Olsen, R. H. (1968). “Lateral pressure of concrete on formwork.” Ph.D. thesis, Oklahoma State Univ.
Petit, J. Y., Wirquin, E., Vanhove, Y., and Khayat, K. (2007). “Yield stress and viscosity equations for mortars and self-consolidating concrete.” Cem. Concr. Res., 37(5), 655–670.
Ritchie, A. (1962). “The triaxial testing of fresh concrete.” Mag. Concrete Res., 14(40), 37–41.
Shapira, A. (1999). “Contemporary trends in formwork standards: A case study.” J. Constr. Eng. Manage., 125(2), 69–75.
Tattersall, G. H. (1976). The workability of concrete, Cement and Concrete, Slough, U.K.
Vanhove, Y., Djelal, C., and Magnin, A. (2004). “Prediction of lateral pressure exerted by self-compacting concrete on formwork.” Mag. Concrete Res., 56(1), 55–62.
Vidal, P., Gallego, E., Guaita, M., and Ayuga, F. (2006). “Simulation of the filling pressures of cylindrical steel silos with concentric and eccentric hoppers using 3-dimensional finite element models.” Trans. ASABE, 49(6), 1881–1895.
Vidal, P., Guaita, M., and Ayuga, F. (2005). “Analysis of dynamic discharge pressures in cylindrical slender silos with a flat bottom or with a hopper: Comparison with Eurocode.” Biosyst. Eng., 91(3), 335–348.
Zienkiewicz, O. C., and Taylor, R. L. (1991). The finite element method, 4th Ed., McGraw-Hill, London.
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Information
Published In
Journal of Construction Engineering and Management
Volume 136 • Issue 7 • July 2010
Pages: 803 - 810
Copyright
© 2010 ASCE.
History
Received: Nov 14, 2008
Accepted: Dec 2, 2009
Published online: Dec 14, 2009
Published in print: Jul 2010
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