3.2 Reinforcement

These are several predefined reinforcement materials in the material Library. These materials are according to code ACI-318R-05. The following table shows materials with their code dependent properties.

There are two groups of properties

Code independent

Code dependent ACI 318(M)-05

Note – Letter (M) in the name ACI 318(M)-05 means the values are calculated according to formulas metric unit and recalculated into US unit

Name – name of the reinforcement, where value 30, 40 etc. presents specified yield strength of reinforcement in “psi” unit, for example S40

Code independent – this part of material is the same for all codes

Material type – Reinforcement steel – sign which type of material is it

Thermal expansion

the coefficient used for the calculation of temperature load;

value =5,55e-06 inch/inchF

Unit mass – value = 0,490 kips/ft³

E modulus (chapter 8.5.2 ACI 318-05)

Poisson coeff (μ). – Poisson coefficient for calculation G modulus and others

Independent G modulus – when this checkbox is set OF then G modulus is calculated using E modulus and Poisson coefficient

Log. Decrement – the value needed for the damped oscillation in dynamics

Colour – colour of material needed for drawing and filters

Bar surface – type of surface of reinforcement

Ribbed

Smooth

Order in code – number of the material in the code

Code dependent

Specific yield strength

Only value in interval <0, fy,max> can be defined if check box “Calculated dependent values” is turned on

Only positive value can be defined if check box “Calculated dependent values” is turned off

Calculated dependent values

If the check box is turned on, the values, eps y, eps u are calculated according to code ACI 318(M)-05 and they are not editable

If the check box is turned off, the values eps y, eps u can be inputted by user and they are not editable

Strain at reaching maximum strength eps y

Only value in interval <0, eps cu> can be defined, if check box “Calculated dependent values” is turned off

if check box “Calculated dependent values” is turned on, value eps y = fy/Es

Maximum strain eps u

This value is not defined in code, the value is set to 0,01

Stress and strain diagram

Type of diagram there is only one option for ACI code – Bilinear without inclined to branch

Picture of diagram – three dot button with drawn diagram

US unit format

Metric format