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Experimental and theoretical investigation of crack width calculation methods for RC ties
Author(s) -
Tan Reignard,
Eileraas Kristoffer,
Opkvitne Ola,
Žirgulis Giedrius,
Hendriks Max A. N.,
Geiker Mette,
Brekke DanEvert,
Kanstad Terje
Publication year - 2018
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201700237
Subject(s) - eurocode , differential (mechanical device) , structural engineering , reinforced concrete , differential equation , code (set theory) , mathematics , computer science , mathematical analysis , engineering , set (abstract data type) , programming language , aerospace engineering
This paper theoretically and experimentally investigates the semi‐empirical formulas recommended by Eurocode 2 (EC2), fib Model Code 2010 (MC2010), and Eurocode 2 with the German National Annex (DIN) for calculating crack widths in reinforced concrete. It is shown that the formulas can be derived from the principles for the idealized behavior of RC ties. However, instead of explicitly solving the resulting differential equations, the use of simplifications leads to inconsistent formulas. An experimental study was carried out involving the testing of eight RC ties to discover the modeling uncertainty of the formulas. It was found that EC2 substantially overestimated the crack widths for the RC ties. MC2010 and DIN seemed to predict the crack widths better, but gave rather a large number of nonconservative crack width predictions. These experimental results, combined with the theoretical study, suggest that a more consistent calculation model should be formulated by explicitly solving the resulting differential equation.