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# T-section in bending at the ULS: the longitudinal reinforcements Asc and As

## Eurocode 2 - Design of concrete sections \$(document).ready(function () { \$("#mainMenu li#nav-appCate, #mainMenu li#nav-appEC2ds").addClass("active"); var freeExample = \$("#freeExample").length; var proUser = false === true || false === true || freeExample !== 0; if (!proUser) { \$('#Input input').keyup(function(){ \$('#AlertSubscribe').modal(); }); \$('#Input select').change(function(){ \$('#AlertSubscribe').modal(); }); }; var tempInput = \$("#tempInput").text(); if (tempInput != "") { \$("#Input").parent("form").deserialize(tempInput); if (proUser) { \$("#acceptBtn").trigger("click"); } }; });  Method b4

The reinforcements of a T-section in bending at the ultimate limit state are calculated according to method b4.

The parameters needed for the design are the followings:

Steel class: see Table C.1. The characteristic strain εuk and the ductility property k will be taken equal to their minimum values in the table;
Es
is the design value of the modulus of elasticity of the reinforcing steel, see § 3.2.7 (4);
fyk
is the yield strength of the reinforcing steel, see § 3.2.2 (3)P;
γs
is the partial factor for reinforcing steel at the ultimate limit state, see § 2.4.2.4 (1);
Steel diagram: is the design stress-strain diagram for reinforcing steel, from which the design strain limit εud and the stress in the steel will be defined. See § 3.2.7 (2) and application stress-strain for reinforcing steel;
Coef(εud/εuk): is chosen by National Annex, see § 3.2.7 (2);
Concrete class: see Table 3.1;
fcd
is the design compressive strength of concrete, see application;
bw
is the web width of the T-section;
beff
is the flange width of the T-section;
hf
is the flange height of the T-section;
d
is the effective depth of the T-section;
d'
is the distance from the compression fibre to the centre of gravity of the compression steel;
MEd
is the design bending moment at the ultimate limit state.

The calculated reinforcements should be compared to the minimum and maximum reinforcement requirements for members (slabs, beams, foundations...). Such verification is outside scope of this application.

This application calculates the reinforcements As, Asc from your inputs. Intermediate results will also be given.

Input
GPa
MPa
MPa
cm
cm
cm
cm
cm
kNm

Output
fyd
MPa
εse
%
k
εuk
%
εud
%
εcu3
%
αAB
αse
fck
MPa
λ
η
MTu
kNm
x
cm
σs
MPa

Compressive reinforcement Asc
cm2
Tensile reinforcement As
cm2