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Eurocode 2 ULS design of I-shaped, T-shaped, and box-shaped reinforced concrete cross-section for bending and axial force

Description:
ULS design of I-shaped, T-shaped, and box-shaped reinforced concrete cross-section for bending and axial force (calculation of required reinforcement for given bending moment / axial force, maximum moment resistance MRd for given axial force, or complete M-N interaction diagram for given reinforcement layout)
According to:
EN 1992-1-1:2004+AC2:2010 Section 6.1
Applicable for:
Uniaxial bending. Box-shaped cross-section can be treated as an equivalent I-shaped cross-section accounting for the total width of webs. Reinforcement layers of the flanges can be concentrated at the centerline of the corresponding flange as an approximation.
Supported National Annexes:
Nationally Defined Parameters (NDPs) automatically filled for supported countries
All Calculations
Input
MPa
e.g. 30 MPa for concrete class C30/37. For a list of concrete classes see Table of Concrete Design Properties
MPa
The elastic-perfectly plastic model (no hardening) is permitted in EN1992-1-1 §3.2.7(2) with unlimited strain. A strain limit of 75‰ is consider in this calculation for numerical reasons. Alternatively stress-strain laws with hardening and limited strains may be considered according to the ductility classes A, B or C specified in EN1992-1-1 Annex C.
‰
m
m
m
m
m
m

Initial reinforcement: When the required reinforcement is requested the initial reinforcement will be modified accordingly.

Enter 0 to disable the bottom reinforcement layer. Non-integer values are handled by suitable modification of bar cross-sectional area.
mm
m
Enter 0 to disable the top reinforcement layer. Non-integer values are handled by suitable modification of bar cross-sectional area.
mm
m
Distance from bar centroid of top reinforcement layer to concrete edge
Enter 0 to disable the side reinforcement layer. Non-integer values are handled by suitable modification of bar cross-sectional area.
mm
kNm
The design value of the bending moment at the ULS combination for which the required reinforcement will be determined
kN
The design value of the axial force at the ULS combination for which the maximum bending moment resistance of the cross-section will be calculated
The specified layers will be modified proportionally by multiplication by the same factor. The rest of the layers will remain unchanged.
I-beam or T-beam concrete cross-section
I-beam or T-beam concrete cross-section
Nationally Defined Parameters
According to EN1992-1-1 §3.1.6(1)P and the National Annex.
According to EN1992-1-1 §2.4.2.4 and the National Annex.
According to EN1992-1-1 §2.4.2.4 and the National Annex.
According to EN1992-1-1 §3.2.7(2) and the National Annex.
Note: Always verify the validity of the Nationally Defined Parameters (NDPs). Please inform us of any discrepancy using our Contact Form. The NDP value is left blank for all NDPs that we do not have this information available. Interested users who have access to the corresponding NDPs can notify us using our Contact Form to fill-in the missing information.