Time Dependent Material (Comp. Strength)
Define Compressive Strength of concrete or the change of modulus of elasticity to reflect the variation of modulus of elasticity with time.
The concrete age of each member is measured from the time the concrete is cast, and each member will have an appropriate compressive strength and modulus of elasticity at each construction stage.
If concrete is poured into different parts of a composite section in stages, the difference in compressive strength and modulus of elasticity of each part, due to the difference in concrete age of each part, can be considered.
To reflect the change in compressive strength of concrete or the change in modulus of elasticity, 'Variation of Comp. Strength' option should be checked in Construction Stage Analysis Control Data.
From the Main Menu select Properties > Time Dependent Material > Comp. Strength.
Click 
to define
a new time variant modulus of elasticity (Comp. strength). Click
and 
to change
and delete the data previously entered. Click 
to copy previously entered data.
Name
Enter the name of function defining the time variant modulus of elasticity (Comp. strength) of concrete.
Type
Select Code to define the time dependent compressive strength of concrete, or directly specify the numerical values defining the function.
Development of Strength
When Code is selected in Type, the change of modulus of elasticity is defined by the change of compressive strength.
Code
Select a code defining the change of compressive strength of concrete.
(in MPa)
: Density of concrete, kg/m3
: Compressive strength of concrete,
MPa
Where
INDIA(IRC:18-2000) is selected
Where User is selected,
enter the modulus of elasticity varying with time under Time and
Elasticity in the table.
:
Produce a graph based on the entered
data.
Note 1
If User is selected, the entered compressive strength and tensile
strength do not affect general analysis, but they are reflected
only for the calculation of crack index in heat of hydration analysis.
Note
2
The user may directly input all of modulus of elasticity, compressive
strength and tensile strength.
Scale Factor
Enter a multiplier to apply to the values for modulus of elasticity if User Type is assigned.
Graph Options
Check on for Log Scale graph.
Graph Type
The Y-axis of the graph can represent compressive strength, tensile strength or modulus of elasticity.