Beton kan nauwelijks trekspanningen opnemen.
Wapening werkt pas als de beton gescheurd is.
Scheurvorming in de betondekking kan de bescherming van het staal
verminderen tegen agressieve stoffen.
Dus scheurwijdte wmax beperken.
wmax = 0,4 mm voor X0 en XC1 en wmax = 0,3 mm voor XC2-4, XD1-2 en XS1
Toelaatbare scheurwijdte afhankelijk van de milieuklasse.
Levert geen direct gevaar dus geen ULS maar BGT-eis.
Scheurvorming is te beheersen door een goede detaillering van de
wapening.
Berekening is erg complex vanwege de vele factoren zoals: Betontreksterkte,
betondekking, scheurafstand, staaloppervlak, materiaaleigenschappen etc.
detailleringsregels
TCIT-CO14-08 zeg mrt. 2009 3
scheurvorming
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