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http://dx.doi.org/10.9712/KASS.2017.17.4.167

Evaluation of Maximum Lateral Pressure on the 3D Printed Irregular-Shaped Formwork by Finite Element Analysis  

Lee, Jeong-Ho (School of Civil, Environmental, Architectural Engineering, Korea University)
Ju, Young K. (School of Civil, Environmental, Architectural Engineering, Korea University)
Kim, Hak-Beom (School of Civil, Environmental, Architectural Engineering, Korea University)
Publication Information
Journal of Korean Association for Spatial Structures / v.17, no.4, 2017 , pp. 167-174 More about this Journal
Abstract
The F3D(Free-Form Formwork 3D Printer) technology that manufactures EPS(Expanded Polystyrene) formworks for irregular-shaped concrete structures by 3D printers was developed to reduce the cost and time. Because of weak strength and low elastic modulus of the EPS, structural performance including lateral pressure by fresh concrete of the formwork that consisted of EPS should be investigated. In order to calculate lateral pressures acting on formwork, several variables including sizes, shapes of formwork, tangential force(fricition) between fresh concrete and formwork, and material properties of fresh concrete should be considered. However, current regulations have not considered the properties of concrete, only focused on vertical formwork. Galleo introduced 3-dimensional finite element analysis models to calculate lateral pressure on formwork. Thus, proposed finite element analysis model based on previous studies were verified for vertical formwork and irregular-shaped formwork. The test results were compared with those by FEM analysis. As a result, the test agrees well with the analysis.
Keywords
3D printer; Irregular-shaped structure; Formwork; Fresh concrete; Lateral pressure;
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  • Reference
1 Hanna, A. S., Senouci, A. B., "Material Cost Minimization of Concrete Wall Forms", Building and Environment, Vol.32, No.1, pp.57-67, 1999   DOI
2 Shapira, A., "Contemporary Trends in Formwork Standards - A Case Study," Journal of Construction Engineering and Management- ASCE, Vol.125, No.2, pp.69-75, 1999   DOI
3 Gallego, E., Fuentes, J. M., Ramirez, A., Ayuga, F., "Design of Tall Formworks by a Finite-Element Model," Journal of Construction Engineering and Management- ASCE, Vol.136, No.7, pp.803-810, 2010   DOI
4 Gallego, E., Fuentes, J. M., Ramirez, A., Ayuga, F., "Computer Simulation of Complexshaped Formworks Using Three-dimensional Numerical Models," Automation in Construction, Vol.20, No.7, pp.830-836, 2011   DOI
5 국가건설기준, "거푸집 및 동바리 설계기준", KDS 21 50 00, 국토교통부, 경기도 고양시, 2016, p29
6 Tattersall, G. H., "The Workability of Concrete", Cement and Concrete Association, Slough, U.K, 1976
7 Gardner, N. J., "Pressure of Concrete on Formwork - a Review," Journal of the American Concrete Institute, Vol.82, No.5, pp.744-753, 1985
8 Gallego, E., Fuentes, J. M., Ramirez, A., Navamuel, B., Ayuga, F., "Calculo de Encofradosde gran Altura Mediante un Modelo de Elementos Finitos: Estudio Parametrico", Informes de la Construccion, Vol.59, No.505, pp.73-81, 2007
9 Ferraris, C.F., Larrard, F. de, "Testing and Modelling of Fresh Concrete Rheology", NISTIR 6094, Building and Fire Research Laboratory, Gaithersburg, Maryland, 1998, p.61
10 Murata, J., Kukawa, H., "Viscosity Equation for Fresh Concrete", ACI Materials Journal, Vol.89, No.3, pp.230-237, 1992
11 Arslan, M., Simsek, O., Subasi, S., "Effects of Formwork Surface Materials on Concrete Lateral Pressure," Construction and Building Materials, Vol.19, No.4, pp.319-325, 2005   DOI
12 S.H. Yoo, "[Development of Non-metallic (Expanded Polystyrene) Insulating Finishing Material with Function of Formwork]", Gyeongnam National Unviersity of Science and Technology, Jinju, Gyeongsangnamdo, 2014
13 Santilli, A., Puente, I., Tanco, M., "A factorial Design Study to Determine the Significant Parameters of Fresh Concrete Lateral Pressure and Initial Rate of Pressure Decay", Construction and Building Materials, Vol.25, No.4, pp.1946-1955, 2011   DOI
14 ACI, "Guide to Formwork for Concrete", ACI 347, American Concrete Institute, Farmington Hills, Michigan, 2014, p32
15 Khayat, K. H., Assaad, J. J., "Measurement Systems for Determining Formwork Pressure of Highly-flowable Concrete," Materials and Structures, Vol.41, No.1, pp.37-46, 2008   DOI