Ultimate limit state - Punching shear
Coefficients
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Kapa s |
Coefficient of reinforcement. It is not calculated according to Annex 9, the user defines the value. CSN 73 12 01, art. 5.5.6.13 Default value = 1.0. |
|
Kapa a |
Coefficient of axial force. It is not calculated according to Annex 9, the user defines the value. CSN 73 12 01, art. 5.5.6.13 Default value = 1.0. |
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qu (5.5.6.12 (198)) |
The coefficient of qbu in Eg. (199) may be set by the user. CSN 73 12 01, Art. 5.5.6.12, formula (198) Default value = 1.0 |
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Max value of qu |
One of the conditions of reliability – the calculation shear force corresponding to the punching shear capacity must be lower than the calculation shear force corresponding to the punching shear capacity taken by concrete. CSN 73 12 01,art. 5.5.6.12, formula 199 Default value = 2.0 |
Shear reinforcement
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Max value of Rsf |
The limit for maximal calculation strength of steel in tension (punching shear reinforcement). CSN 73 12 01, art. 5.5.6.14. Default value 300 MPa |
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Min thickness of plate |
Minimal thickness of the plate for inclusion of shear reinforcement. CSN 73 12 01, art. 5.5.6.16 Default value 200mm. |
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Min position of reinforcement row |
Detailing provision defining the position of shear reinforcement. It is the foot of the hook, if bent-up bars are used. CSN 73 12 01, art. 5.5.6.14, fig. 33 |
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Max position of the first row reinforcement |
See above, this item relates to the first row of shear reinforcement from the face of the column. |
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Max position of other rows reinforcement |
See above, this item relates to subsequent rows of shear reinforcement and their inclusion in the calculation of resistance. |