Stopień zewnętrznego skrępowania odkształceń wymuszonych w świetle prEN 1992-1-1

• Autorzy: Jędrzejewska Agnieszka , Zych Mariusz

Warianty tytułu

EN

Degree of external restraint of imposed strain in the view of a new Draft of EN 1992-1-1

• Języki publikacji: PL

Abstrakty

PL

Przedstawiono wybrane metody wyznaczania współczynnika skrępowania wraz z komentarzem oraz oceną ich zastosowania w świetle nowego Draftu Eurokodu 2 (prEN 1992-1-1), który wprowadza możliwość oceny ryzyka zarysowania oraz model obliczania szerokości rys od odkształceń wymuszonych.

EN

The paper concisely presents the summary of chosen methods for determination of the restraint factor with a commentary of the authors, and evaluation of their applicability in the view of a new Draft of Eurocode 2 (prEN 1992-1-1) which introduces the method for control of the risk of cracking and the model for calculation of the width of cracks caused by imposed strains.

Słowa kluczowe

PL

skrępowanie; odkształcenie wymuszone; konstrukcja żelbetowa; EN 1992-1-1; pełzanie betonu; zarysowanie

EN

restraint; forced deformation; reinforced concrete structure; EN 1992-1-1; concrete creep; cracking

• Wydawca: Fundacja Polskiego Związku Inżynierów i Techników Budownictwa
• Czasopismo: Inżynieria i Budownictwo
• Rocznik: 2021
• Tom: R. 77, nr 11-12
• Strony: 553--561
• Opis fizyczny: Bibliogr. 27 poz., il., tab.

Twórcy

autor

Jędrzejewska Agnieszka

• Politechnika Śląska, Wydział Budownictwa

• https://orcid.org/0000-0003-4395-0447

autor

Zych Mariusz

• Politechnika Krakowska, Wydział Inżynierii Lądowej

• https://orcid.org/0000-0002-1890-9891

Bibliografia

• [1] ACI Committee 207: ACI 207.2R-07: Report on thermal and volume change effects on cracking of mass concrete, 2007.
• [2] Al-Gburi M.: Restraint in structures with young concrete - tools and estimations for practical use. PhD thesis, Lulea University of Technology, Luleå 2014.
• [3] Altoubat S.A., Lange D.A.: Creep, shrinkage and cracking of restrained concrete at early age. “ACI Materials Journal”, 98/4, 2001.
• [4] Azenha M., Kanavaris F., Schlicke D., Jędrzejewska A., Benboudjema F., Honorio T., Šmilauer V., Serra C., Forth J., Riding K., Khadka B., Sousa C., Briffaut M., Lecarriére L., Koenders E., Kanstad T., Klausen A., Torrenti J.-M., Fairbairn E.: Recommendations of RILEM TC 287-CCS: thermo-chemo-mechanical modelling of massive concrete structures towards cracking risk assessment. “Materials and Structures”, 54, 2021.
• [5] Bamforth P.B.: CIRIA C766: Control of cracking caused by restrained deformation in concrete, 2018.
• [6] Bamforth P.B.: Early-age thermal cracking in concrete. Institute of Concrete Technology, Technical Note TN/2, Slough, 1982.
• [7] Bažant Z.P.: Prediction of concrete creep effects using age-adjusted effective modulus method. “ACI Journal Proceedings”, 69, 1972.
• [8] EN 1992-1-1: Eurocode 2: Design of concrete structures. Part 1-1: General rules and rules for buildings, 2004.
• [9] EN 1992-3: Eurocode 2: Design of concrete structures. Part 3: Silos and tanks, 2006.
• [10] Emborg M., Bernander S., Jonasson J.-E., Nilsson M.: Avoidance of early-age cracking - principles and recommendations. IPACS Report BE96-3843, Department of Civil and Mining Engineering, Luleå University of Technology, Luleå, Sweden, 2003.
• [11] Flaga K.: Naprężenia skurczowe i zbrojenie przypowierzchniowe w konstrukcjach betonowych. Monografia. Wydawnictwo Politechniki Krakowskiej, Kraków 2004.
• [12] Flaga K., Klemczak B., Knoppik-Wróbel A.: Wczesne rysy termiczno-skurczowe w ścianach przyczółków mostowych. “Inżynieria i Budownictwo”, 4/2013.
• [13] Hösthagen A.: Thermal Crack Risk Estimation and Material Properties of Young Concrete. PhD thesis, Luleå University of Technology, Luleå, 2017.
• [14] Japan Society of Civil Engineers: Standard specifications for concrete structures - Design, 2010.
• [15] JCI Guidelines for control of cracking of mass concrete, 2008.
• [16] JCI Guidelines for control of cracking of mass concrete, 2016.
• [17] JCI Technical Committee on thermal stress of massive concrete structures. Technical Committee Report, 1985.
• [18] Kheder G.F., Al Rawi R.S., Al Dhali J.K.: Study of the behaviour of volume change cracking in base-restraint concrete walls. "ACI Structural Journal", 91/2, 1994.
• [19] Knoppik-Wróbel A., Klemczak B.: Degree of restraint concept in analysis of early-age stresses in concrete walls. "Engineering Structures", 102, 2015.
• [20] Nilsson M.: Thermal cracking of young concrete. Lic thesis, Luleå University of Technology, 2000.
• [21] Nilsson M.: Restraint factors and partial coefficients for crack risk analyses of early age concrete structures. Phd thesis, Luleå University of Technology, 2003.
• [22] Larson M.: Thermal crack estimation in early age concrete: models and methods for practical application. Phd thesis, Luleå University of Technology, 2003.
• [23] prEN 1992-1-1: Draft of Eurocode 2: Design of concrete structures. Part 1-1: General rules and rules for buildings, 2021.
• [24] Seruga A., Zych M.: Thermal Cracking of the Cylindrical Tank under Construction. I: Case Study. "Journal of Performance of Constructed Facilities", 29/4, 2015.
• [25] Vitherana V., Sakai K.: Early-age behaviour of concrete sections under straininduced loading. 3rd International Conference on Concrete Under Severe Conditions CONSEG 95, Sapporo, Japonia, 1995.
• [26] Zych M.: Degree of External Restraint of Wall Segments in Semi-Massive Reinforced Concrete Tanks: Part II: Rectangular and Cylindrical Segments. "Structural Concrete: Journal of the fib", 19/3, 2018.
• [27] Zych M.: A New Model of Crack Control in Reinforced Concrete Tank Walls - Part I: Analytical Investigation. "ACI Structural Journal", 116/3, 2019.