The influence of concrete shrinkage on durability of reinforced structural members

• Autorzy: Flaga K.

Identyfikatory

DOI

10.1515/bpasts-2015-0002

• Języki publikacji: EN

Abstrakty

EN

The aim of the paper was to present the author’s novel approach to the problem of the influence of concrete shrinkage on the static-strength performance of reinforced structures. The problem of concrete shrinkage has been known in concrete technology for years, mainly in the theoretical and experimental aspects. However, there are few works in which the effect of concrete shrinkage in real reinforced structural members and structures is shown. In the present article the author performs an analysis of these effects on a macro-scale, useful in the assessment of the influence of concrete shrinkage on limit states of bearing capacity and serviceability of reinforced concrete structures. An important distinction is made between shrinkage stresses imposed in RC members by external and internal (reinforcement induced) constraints and residual shrinkage stresses inside members (massive especially) resulting from non-stationary and non-linear moisture fields. The article concludes with a way of calculating the necessary, near-surface anti-shrinkage reinforcement in such members.

Słowa kluczowe

EN

unrestrained shrinkage of concrete; calculation of shrinkage in reinforced concrete; internal forces and shrinkage stresses in a structure imposed by external and internal constraints; residual shrinkage stresses; massive elements

PL

niepohamowany skurcz betonu; obliczanie skurczu betonu zbrojonego; siły wewnętrzne; naprężenia skurczowe; masywne elementy

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2015
• Tom: Vol. 63, nr 1
• Strony: 15--22
• Opis fizyczny: Bibliogr. 17, tab., wykr., rys.

Twórcy

autor

Flaga K.

• Cracow University of Technology, 24 Warszawska St., 31-155 Cracow, Poland

Bibliografia

• [1] A.M. Neville, Properties of Concrete, pp. 931, Polish Cement, Krakow, 2012, (in Polish).
• [2] O.M. Jansen and P.Fr. Hansen, “Antogenous deformation and RH- change in perspective”, Cement and Concrete Research 31 (12), 1859-1865 (2001).
• [3] J.A. Almudaiheem and W. Hansen, “Effect of specimen size and shape on drying shirinkage”, ACI Materials J. 84 (2), 130-134 (1987).
• [4] E. Tazawa and S. Miyazawa, “Autogenous shrinkage of concrete and its importance in concrete”, Creep and Shrinkage in Concrete, Proc. 5th Int. RILEM Symp. 1, 159-168 (1993).
• [5] R.W. Carlson and T.J. Reading, “Model study of shrinkage cracking in concrete building walls”, ACI Structural J. 85 (4), 395-404 (1988).
• [6] R. Mensi, P. Acker, and A. Attolou, “Séchage du béton: analyse et modelisation”, Materials and Structures 21 (121), 3-12 (1988).
• [7] S.W. Aleksandrowskij, Rascziot Bietonnych i Żelezobietonnych Konstrukcji na Temperaturnyje i Włażostnyje Wozdiejstwia, Strojizdat, Moskwa, 1966.
• [8] H. Rüsch and D. Jungwirth, Shrinkage and Creep in Reinforced Concrete Structures, Arkady, Warszawa, 1979, (in Polish).
• [9] F. Leonhardt, “Cracks and cracks control at concrete structures”, IABSE Periodica 1, CD-ROM (1987).
• [10] B. Klemczak, “Importance of Professor Kazimierz Flaga research works in the field of thermal-shrinkage effects in concrete structures”, Architecture, Civil Engineering, Environemnt 7 (1), 7-15 (2014).
• [11] PN-EN 1992-1-1:2008, “Eurocod 2. Design of concrete structures. Part 1-1: General rules and rules for buildings”, (2008), (in Polish),
• [12] K. Flaga, “Shrinkage stress and anti-shrinkage reinforcement in concrete structures”, Monograph 391, pp. 139, Cracow University of Technology, Cracow, 2011, (in Polish).
• [13] K. Flaga, “The role of concrete shrinkage on reinforced concrete structural members”, Engineering and Building 9, 499-505 (2014), (in Polish).
• [14] K. Flaga, K. Furtak, and J. Jargiełło, “Applying of modified aging - time theory to the assessment of shrinkage stress relaxation in reinforced concrete members”, Archives of Civil Engineering XXX (4), CD-ROM (1984), (in Polish).
• [15] K. Flaga, “The behaviour of anti - shrinkage reinforcement in RC deep beams”, Proc. XXVIII Conf. KILiW PAN and KN PZITB 1, CD-ROM (1982), (in Polish).
• [16] K. Flaga and M. Andreasik, “Thermal-shrinkage stresses in massive concrete elements”, Proc. XXXIII Conf. KILiW PAN and KN PZITB 1, CD-ROM (1987), (in Polish).
• [17] K. Flaga and T. Wilczyński, “Shrinkage deformation of concrete prismatic elements influenced by non-stationary field of moisture”, in Scientific Notebook of Construction Engineering Board O/K PAN, Ossolineum, Wrocław, 1982, (in Polish).