Browse > Article
http://dx.doi.org/10.12989/sem.2017.64.2.173

Short- and long-term deflections of RC building structures influenced by construction processes  

Alvarado, Yezid A. (Pontificia Universidad Javeriana)
Buitrago, Manuel (ICITECH, Universitat Politecnica de Valencia)
Gasch, Isabel (ICITECH, Universitat Politecnica de Valencia)
Dominguez, Maria N. (Pontificia Universidad Javeriana)
Cipagauta, Miguel A. (Pontificia Universidad Javeriana)
Publication Information
Structural Engineering and Mechanics / v.64, no.2, 2017 , pp. 173-181 More about this Journal
Abstract
This paper analyzes the influence of the construction process on short- and long-term deflections on a reinforced concrete structure poured on-site by a portable industrialized system. A parametric analysis was carried out by the Finite Elements Method (FEM) that considered: a) type of construction process with reshoring or clearing (partial striking); b) the number of successively shored floors and c) the number of shores used on each floor. All three factors were especially important for the values of short- and long-term deflections, which were highest in the reshoring processes with the lowest number of successively shored floors and the lowest number of shores per floor. Deflections obtained were compared with the limits laid down by ACI 318-14 and as calculated by this code's simplified method. The long-term deflections were seen to be almost double than those obtained by applying the ACI 318-14 code's simplified method and in some cases these deflections were above the established limits. It can thus be concluded that the load history of a building under construction should be taken into account in order to satisfy a structure's in-service conditions and durability.
Keywords
clearing; construction process; creep; deflection; industrialized system; shores; shoring; striking;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Gasch, I., Alvarado, Y.A. and Calderon, P.A. (2012), "Temperature effects on load transmission between slabs and shores", Eng. Struct., 39, 89-102.   DOI
2 Gasch, I., Alvarado, Y.A., Calderon, P.A. and Ivorra, S. (2014), "Construction loads using a shoring-clearing-striking process", P. I. Civil Eng., Struct. B, 167(SB4), 217-229.   DOI
3 Huang, Y., Lin, Y., Lee, C., Chen, H. and Yen, T. (2004), "Design load-carrying capacity estimates and an improved wooden shore setup", Struct. Eng. Mech., 17(2), 167-186.   DOI
4 Kaminetzky, D. and Stivaros, P. (1994), "Early-age concrete: Construction loads, behavior, and failures", Concrete Int., 16(1), 58-63.
5 Kang, S., Eom, T. and Kim, J. (2013), "Reshoring effects on deflections of multi-shored flat plate systems under construction", Struct. Eng. Mech., 45(4), 455-470.   DOI
6 Lee, H., Liu, X. and Chen, W. (1991), "Creep analysis of concrete buildings during construction", J. Struct. Eng., 117(10), 3135-3148.   DOI
7 Lin, S.C. (2007), "Monitoring of concrete building construction", Can. J. Civil Eng., 34(10), 1334-1351.   DOI
8 Liu, X.L. and Chen, W.F. (1987), "Effect of creep on load distribution in multistory reinforced concrete buildings during construction", Struct. J., 84(3), 192-200.
9 Moragues, J.J., Catala, J. and Pellicer, E. (1996), "An analysis of concrete framed structures during the construction process", Concrete Int., 18(11), 44-48.
10 ACI 318-14 (2014), Building code requirements for structural concrete, American Concrete Institute, Farmington Hills, MI, USA.
11 ACI 347-14 (2014), Guide to formwork for concrete, American Concrete Institute, Farmington Hills, MI, USA.
12 Aguirre Patino, M.F. (2012), "Evolucion de las normas tecnicas y la inclusion de nuevos sistemas constructivos", Informe Economico, 44, 1-7. (in Spanish)
13 ACI 347.2R-05 (2005), Guide for shoring/reshoring of concrete multistory buildings, American Concrete Institute, Farmington Hills, MI, USA.
14 ACI 435R-55 (2003), Control of deflection in concrete structures, American Concrete Institute, Farmington Hills, MI, USA.
15 Aguinaga-Zapata, M. and Bazant, Z.P. (1986), "Creep deflections in Slab Buildings and forces in shores during construction", ACI J., 83, 719-726.
16 Alvarado, Y.A., Calderon, P.A., Gasch, I. and Adam, J.M. (2010), "A numerical study into the evolution of loads on shores and slabs during construction of multistorey buildings. Comparison of partial striking with other techniques", Eng. Struct., 32(10), 3093-3102.   DOI
17 Calderon, P.A., Alvarado, Y.A. and Adam, J.M. (2011), "A new simplified procedure to estimate loads on slabs and shoring during the construction of multistorey buildings", Eng. Struct., 33(5), 1565-1575.   DOI
18 Alvarado, Y.A., Calderon, P.A., Pallares, F.J. and Pellicer, T. (2006), "Estimation of shore removal times in bidirectional in situ concrete floor slabs applying the maturity method", Proceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, Bangkok, August.
19 Branson, D.E. (1977), Deformation of Concrete Structures, McGraw-Hill Book Co., New York, NY, USA.
20 Buitrago, M., Alvarado, Y.A., Adam, J.M., Calderon, P.A., Gasch, I. and Moragues, J.J. (2015), "Improving construction processes of concrete building structures using load limiters on shores", Eng. Struct., 100, 104-115.   DOI
21 Duan, M.Z. and Chen, W.F. (1995), "Improved simplified method for slab and shore load analysis during construction", Project Report CE-STR-95-21, Department of Civil Engineering, Purdue University, West Lafayette, Ind.
22 Castro-Garrido, M.C., Lopez-Garzon, M.C., Alvarado, Y.A., Castano, J.O. and Gasch, I. (2016), "Aplicacion del metodo de la madurez para la estimacion del plazo de descimbrado de forjados construidos con sistemas industrializados", Inf. Constr., 68(541), e131. (in Spanish)   DOI
23 Diaz, J.C., Bautista, L., Sanchez, A. and Ruiz, D. (2004), "Caracterizacion de mezclas de concreto utilizadas en sistemas industrializados de construccion de edificaciones", Rev. Ing., 19, 60-73. (in Spanish)
24 Duan, M.Z. and Chen, W.F. (1995), "Effects of creep and shrinkage on slab-shore loads and deflection during construction", Project Report CE-STR-95-24, Department of Civil Engineering, Purdue University, West Lafayette, Ind.
25 Statgraphics (2013), Statgraphics Centurion XV, StatPoint Technologies, Inc.
26 ETABS (2013), Computers & Structures, INC.
27 Eldukair, Z.A. and Ayyub, B.M. (1991), "Analysis of recent U.S. structural and construction failures", J. Perform. Constr. Facil., 5(1), 57-73.   DOI
28 Epaarachchi, D.C., Stewart, M.G. and Rosowsky, D.V. (2002), "Structural reliability of multistory buildings during construction", Struct. Eng., 128(2), 205-213.   DOI
29 Essays, UK (2013), The definition of industrialised building system construction essay. Retrieved from https://www.ukessays.com/essays/construction/the-definitionof-industrialised-building-system-constructionessay.php?cref=1.
30 Fang, D.P., Xi, H., Wang, X. and Zhang, Ch. (2009), "Influences of shrinkage, creep, and temperature on the load distributions in reinforced concrete buildings during construction", Tsinghua Sci. Tech., 14(6), 756-764.   DOI
31 Fang, D.P., Xi, H., Wang. X., Zhang, Ch. and Zhao, T. (2009), "Load distribution assessment of reinforced concrete buildings during construction with structural characteristic parameter approach", Tsinghua Sci. Tech., 14(6), 746-755.   DOI