Define Construction Stage
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When we design high-rise buildings, column and vertical member shortenings may present significant effects on the analysis results. This function allows us to define necessary construction stages to analyze a high-rise structure reflecting the effects of evolving structure configurations, elastic column shortenings and time dependent (creep and shrinkage) column shortenings.
Each construction stage is identified with activated (or deactivated) element, boundary and load groups. Each stage retains a unique element group, a boundary group and a load group, forming an interim independent structure. The stage information that was difficult to define in Wizard can now be added or modified using this function. The Construction Stage Wizard for Building Structures function can be used to generate construction stages. |
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From the Main Menu select Load > Construction Stage > Construction Stage Data > Define Construction Stage.
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When a new construction stage is defined
Depending on the timing of the new construction stage, click , or to invoke the dialog box for Compose Construction Stage and provide the following information:
Stage
Name
Duration
Save Result
Specify a method of saving the analysis results. Both Stage and Steps can be selected.
Stage
Additional Steps
Upon clicking the button, the nodes, elements, boundary groups and load groups applicable to the current stage being defined are displayed in the Current Stage Information box.
Additional Steps
Define the analysis steps within the construction stage. Within a construction stage, where the model and boundary condition remain unchanged, changes in load application timing or additional loads may be incorporated through additional steps.
Day
In the current construction stage being defined, select a day subsequent to the entered Day and add the step to the bottom of the Step list.
Modify the time (day) of the selected step in the Step list.
Delete the selected steps from the Step list.
Clear all the steps listed in the Step to revert to the initial state.
Auto Generation
Element tab
Activate or deactivate relevant element (structure) groups to define the elements applicable to the current stage being defined.
Group List
Activation
Age
Deactivation In the cases of temporary structures, where certain element groups created (activated) in the previous construction stages no longer exist in the current stage being defined, the element groups must be deactivated. Once activated element groups remain active unless they are specifically deactivated. In the Group List, select relevant element groups, and click to deactivate the selected groups. Click to change the percentage of Element Force Redistribution for the selected inactive element groups. Click to expel the selected element groups from the inactive group list to the main Group List. Multiple selections are permitted while pressing the control key.
Element Force Redistribution
Note
Boundary tab
Activate or deactivate relevant boundary groups to define the boundary conditions applicable to the current stage being defined.
Group List
Activation
Support/Spring Position
Original: Apply the boundary condition to the undeformed position. This is equivalent to imposing forced displacements to the original position prior to providing the supports.
Deformed: Apply the boundary condition to the deformed position.
Deactivation
Note
Load tab
Activate or deactivate relevant load groups applicable to the current construction stage being defined. The status of activation can be identified in the stage as well as at the steps. To activate/deactivate at the steps the Additional Steps must be predefined.
Group List
Activation
Active Day
Deactivation
Note
When a number of Construction Stages are defined simultaneously
Click in the Construction Stage dialog box to prompt the Define Construction Stage dialog box to enter the following: Click to modify the generated construction stages.
Stage
Name: The first part of the names of the construction stages
Suffix: The second part of the names of the construction stages
Eg.) If 'CS' in Name and '1 to 4' in Suffix are entered, the four construction stages 'CS1' to 'CS4' are generated.
Duration: Time span for each construction stage
Additional Steps
Additional steps are defined to reflect the change of loads in each construction stage.
Day
Auto Generation
Save Result
Specify a method of saving the analysis results. Both Stage and Steps can be selected.
Stage
Additional Steps
Upon clicking the or button, the last generated construction stages are added to the end of the construction stage list in the Construction Stage dialog box.
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