Time-Dependent Material: Creep/Shrinkage

Function

Define the time dependent creep and shrinkage material data for concrete. The properties are applied to Construction stage analysis and Heat of hydration analysis.

Call

Name

Enter the name of the material property.

Code

Define the Code for which Creep/Shrinkage material properties can be defined.

CEB-FIP

Mean Compressive Strength of Concrete at Age of 28 Days

Relative Humidity of Ambient Environment (40 ~ 99)

Notational Size of Member

Element geometric shape dimension. The formula is h=2*Ac/u as per the CEB-FIP Code.

Type of Cement

Age of Concrete at Beginning of Shrinkage

The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
ACI

Compressive Strength of Concrete at Age of 28 Days

Relative Humidity of Ambient Environment (40 ~ 99)

Volume-Surface Ratio

The volume-surface ratio of the structure.

Age of Concrete at Beginning of Shrinkage

The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.

Initial Curing Method

Moist Cure

Steam Cure

Material Factored Ultimate Value

The user may enter the ultimate values considering concrete properties by ACI code or User type.

ACI Code

Slump

Fine Aggregate Percentage

Air Content

Cement Content

User

Material Factored Ultimate Creep Coefficient (1.3 ~ 4.15)

Ultimate creep coefficient considering concrete properties.

Material Factored Ultimate Shrinkage Strain (415 ~ 1070)

Ultimate shrinkage strain considering concrete properties.
PCA

Compressive Strength of Concrete at Age of 28 Days (fc)

Ultimate Shrinkage Strain (500 ~ 800)

Ultimate Creep Strain (3 ~5)

Relative Humidity of Ambient Environment (40 ~ 99)

Volume-Surface Ratio (v/s)

The volume-surface ratio of the structure.

Reinforcement Ratio of Cross Section of Column Segment

Elastic Modulus of Steel
Combined (ACI & PCA)

Compressive Strength of Concrete at Age of 28 Days

Relative Humidity of Ambient Environment (40 ~ 100)

Volume-Surface Ratio (v/s)

The volume-surface ratio of the structure.

Creep

Material factored ultimate creep strain: Ultimate creep strain considering concrete properties.

Volume-surface Ratio: Equation for Volume-surface Ratio.

Loading aged factored (t : loading age): Equation for loading age coefficient.

Shrinkage

Material factored ultimate shrinkage strain: Ultimate shrinkage strain considering concrete properties.

Volume-surface Ratio: Equation for Volume-surface Ratio.

Progress of Shrinkage with Time

Reinforced Concrete Effect by PCA

Reinforcement Ratio of Cross Section of Column Segment

Elastic Modulus of Steel
AASHTO

Compressive strength of Concrete at Age of 28 Days

Relative Humidity of Ambient Environment (40 ~ 99)

Volume-Surface Ratio

Age of Concrete at Beginning of Shrinkage

The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.

Expose to Drying before 5 Days of Curing

If this option is checked on, the influence of Creep & Shrinkage is increased by 20% (ref. AASHTO 5.4.2.3.Shrinkage and Creep).
European

Characteristic compressive cylinder strength of concrete at the age of 28 days (fck)

Relative Humidity of Ambient Environment (40 ~ 99)

Notational Size of Member

Element geometric shape dimension. The formula is h=2*Ac/u as per Eurocode.

Type of Cement

Type of Code

Age of Concrete at Beginning of Shrinkage

The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
User Defined

Creep Function

Select Creep Function. To add or modify Creep Functions to and from the list, click to prompt the dialog box, "Time Dependent Material (Creep/Shrinkage) Function."

Loading Age

Assign the age (time) at which the members become subjected to loads (for instance, the number of days after which the formwork and/or shoring is removed after the concrete pour in the case of self weights)

Add the defined Creep Function to the list in conjunction with Loading Age.

Modify Loading Age pertaining to the registered Creep Function.

Delete the registered Creep Function together with Loading Age.

Shrinkage Strain Function

Select Shrinkage Function to apply. Click to prompt "Time Dependent Material (Creep/Shrinkage) Function" dialog box to add or delete Shrinkage Function.

Time-Dependent Material: Creep/Shrinkage

Function	Define the time dependent creep and shrinkage material data for concrete. The properties are applied to Construction stage analysis and Heat of hydration analysis.

Call	Main Menu: Analysis > Time-Dependent Material > Creep/Shrinkage... Works Tree: Time-Dependent Material > Creep/Shrinkage...

Name Enter the name of the material property. Code Define the Code for which Creep/Shrinkage material properties can be defined. CEB-FIP Mean Compressive Strength of Concrete at Age of 28 Days Relative Humidity of Ambient Environment (40 ~ 99) Notational Size of Member Element geometric shape dimension. The formula is h=2Ac/u as per the CEB-FIP Code. Type of Cement Age of Concrete at Beginning of Shrinkage The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start. ACI Compressive Strength of Concrete at Age of 28 Days Relative Humidity of Ambient Environment (40 ~ 99) Volume-Surface Ratio The volume-surface ratio of the structure. Age of Concrete at Beginning of Shrinkage The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start. Initial Curing Method Moist Cure Steam Cure Material Factored Ultimate Value The user may enter the ultimate values considering concrete properties by ACI code or User type. ACI Code Slump Fine Aggregate Percentage Air Content Cement Content User Material Factored Ultimate Creep Coefficient (1.3 ~ 4.15) Ultimate creep coefficient considering concrete properties. Material Factored Ultimate Shrinkage Strain (415 ~ 1070) Ultimate shrinkage strain considering concrete properties. PCA Compressive Strength of Concrete at Age of 28 Days (fc) Ultimate Shrinkage Strain (500 ~ 800) Ultimate Creep Strain (3 ~5) Relative Humidity of Ambient Environment (40 ~ 99) Volume-Surface Ratio (v/s) The volume-surface ratio of the structure. Reinforcement Ratio of Cross Section of Column Segment Elastic Modulus of Steel Combined (ACI & PCA) Compressive Strength of Concrete at Age of 28 Days Relative Humidity of Ambient Environment (40 ~ 100) Volume-Surface Ratio (v/s) The volume-surface ratio of the structure. Creep Material factored ultimate creep strain: Ultimate creep strain considering concrete properties. Volume-surface Ratio: Equation for Volume-surface Ratio. Loading aged factored (t : loading age): Equation for loading age coefficient. Shrinkage Material factored ultimate shrinkage strain: Ultimate shrinkage strain considering concrete properties. Volume-surface Ratio: Equation for Volume-surface Ratio. Progress of Shrinkage with Time Reinforced Concrete Effect by PCA Reinforcement Ratio of Cross Section of Column Segment Elastic Modulus of Steel AASHTO Compressive strength of Concrete at Age of 28 Days Relative Humidity of Ambient Environment (40 ~ 99) Volume-Surface Ratio Age of Concrete at Beginning of Shrinkage The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start. Expose to Drying before 5 Days of Curing If this option is checked on, the influence of Creep & Shrinkage is increased by 20% (ref. AASHTO 5.4.2.3.Shrinkage and Creep). European Characteristic compressive cylinder strength of concrete at the age of 28 days (fck) Relative Humidity of Ambient Environment (40 ~ 99) Notational Size of Member Element geometric shape dimension. The formula is h=2Ac/u as per Eurocode. Type of Cement Type of Code Age of Concrete at Beginning of Shrinkage The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start. User Defined Creep Function Select Creep Function. To add or modify Creep Functions to and from the list, click to prompt the dialog box, "Time Dependent Material (Creep/Shrinkage) Function." Loading Age Assign the age (time) at which the members become subjected to loads (for instance, the number of days after which the formwork and/or shoring is removed after the concrete pour in the case of self weights) Add the defined Creep Function to the list in conjunction with Loading Age. Modify Loading Age pertaining to the registered Creep Function. Delete the registered Creep Function together with Loading Age. Shrinkage Strain Function Select Shrinkage Function to apply. Click to prompt "Time Dependent Material (Creep/Shrinkage) Function" dialog box to add or delete Shrinkage Function.