# Changes for page Resistance to spalling (hollowcore elements)

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From version
edited by FredrikLagerstrom
on 2019/07/02 12:18
To version
edited by FredrikLagerstrom
on 2019/07/02 12:18
>
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## Details

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 ... ... @@ -1,4 +2,3 @@ 1 - 2 2 (% class="row" %) 3 3 ((( 4 4 (% class="col-xs-12 col-sm-8" %) ... ... @@ -5,27 +5,20 @@ 5 5 ((( 6 6 = Resistance to spalling (hollowcore) = 7 7 8 -The control is carried out for the first load combination in SLS for each chain of dependence, usually those marked "Release." Formulas to consider are those from EN1168 4.3.3.2.1. 7 +The control is carried out for the first load combination in SLS for each [[chain of dependence>>doc:PRE-Stress.Troubleshooting guides.Load combinations.WebHome]], usually those marked "Release." Formulas to consider are those from EN1168 4.3.3.2.1. 9 9 10 - 11 11 12 12 The general control states that the spalling stress (σsp) must not exceed the spalling capacity (fct). 13 13 14 - 15 15 16 -sigmasp_noexceed_fct 17 -[[image:bild 1.jpg]] 13 +[[image:sigmasp_noexceed_fct.jpg||alt=""]] 18 18 19 -sigma_spall_equation 20 -[[image:bild 1.jpg]] 15 +[[image:sigma_spall_equation.jpg||alt=""]] 21 21 22 -alpha_e_equation 23 -[[image:bild 1.jpg]] 24 - 17 +[[image:alpha_e_equation.jpg||alt=""]] 25 25 26 -where 19 +where: 27 27 28 - 29 29 30 30 fct is the value of the tensile strength of the concrete from the current load combination (see above) 31 31 ... ... @@ -40,6 +40,7 @@ 40 40 k is the core radius equal to the ratio of the section modulus of the bottom fibre and the net area of the cross section (Wb/Ac) 41 41 42 42 35 + 43 43 ))) 44 44 45 45 (% class="col-xs-12 col-sm-4" %)