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
From the main menu, select [Properties] tab > [Material Properties] group > [Time Dependent] > [Creep/Shrinkage]
Input
Fig. Time-Dependent Material(Creep, Shrinkage) dialog box
Name
The material name is entered and referenced from the "Time-Dependent Material Link".
Code
Select the code to define the characteristics of the material for Creep/Shrinkage.
Characteristic Compressive strength of concrete at the age of 28 days
Relative Humidity of ambient environment (40-99)
Notional size of member
Note
1. In case the Notional Size of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Type of Cement
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Type of aggregate
Creep Calculation Process
Shrinkage Calculation Process
Show Result...: Produce the auto-calculated time-dependent material property in a graph.
Characteristic Compressive strength of concrete at the age of 28 days
Relative Humidity of ambient environment (40-99)
Notional size of member
Note
1. In case the Notional Size of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in Composite Section for Construction Stage.
Type of Cement
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Characteristic Compressive strength of concrete at the age of 28 days
Relative Humidity of ambient environment (40 - 100)
Notional size of member
Note
1. In case the Notional Size of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Type of Cement
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the 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 the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Init Curing Method: The initial curing method
Compressive strength of concrete at the age of 28 days
Ultimate shrinkage strain (500~800)
Ultimate creep strain (3~5)
Relative Humidity of ambient environment (40-99)
Volume-surface ratio: The volume-surface ratio of the structure
Reinforcement ratio of cross-section of column segment
Modulus of elasticity of steel
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the age of 28 days
Relative Humidity of ambient environment (40-100)
Volume-surface ratio: 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
Modulus of elasticity of Steel
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the 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 the 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).
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the age of 28 days
Relative Humidity of ambient environment (40-99)
Notational size of member
Note
1. In case the Notational Size of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Characteristic compressive cylinder strength of concrete at the age of 28 days (fck)
Relative Humidity of ambient environment (40-99)
Notational size of member
Note
1. In case the Notational Size of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Type of Cement
Type of Code
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the age of 28 days
Exposure Environment
Arid
Interior
Temperate Inland
Tropical or Near Coastal
Hypothetical Thickness
Note
1. In case the Hypothetical Thickness of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Drying Basic Shrinkage Strain
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the age of 28 days
Exposure Environment
Arid
Interior
Temperate Inland
Tropical or Near Coastal
Hypothetical Thickness
Note
1. In case the Hypothetical Thickness of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Drying Basic Shrinkage Strain
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Compressive strength of concrete at the age of 28 days
Exposure Environment
Arid
Interior
Temperate Inland
Tropical or Near Coastal
Relative Humidity Factor for Shrinkage (0.20~0.72)
Hypothetical Thickness
Note
1. In case the Hypothetical Thickness of Member (h) for each element is different due to a changing section, 'h' for each element needs to be entered in the Change Element Dependent Material Property.
2. In case the Composite Section for Construction Stage is used, 'h' for each Part needs to be entered in the Composite Section for Construction Stage.
Drying Basic Shrinkage Strain(10^6) (570-~1500)
Age of concrete at the beginning of shrinkage: The number of days elapsed after pouring of concrete, when the shrinkage is assumed to start.
Show Result…: Produce the auto-calculated time-dependent material property in a graph.
Creep Function: Select Creep Function. To add or modify Creep Functions to and from the list, click the… button 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 Creep Function: Add the defined Creep Function to the list in conjunction with Loading Age.
Modify: Modify Loading Age pertaining to the registered Creep Function.
Delete: Delete the registered Creep Function together with Loading Age.
Shrinkage Strain Function: Select Shrinkage Function to apply. Click the… button to prompt "Time Dependent Material (Creep/Shrinkage) Function" dialog box to add or delete Shrinkage Function.
Add
You are defining new material data.
Modify
You can review or modify the entered information.
Delete
You can delete the entered material data.