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From version < 4.1 >
edited by FredrikLagerstrom
on 2019/07/02 12:18
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edited by FredrikLagerstrom
on 2019/07/02 12:18
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1 -
2 2  (% class="row" %)
3 3  (((
4 4  (% class="col-xs-12 col-sm-8" %)
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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  
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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" %)
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PRE-Stress Documentation