Function
- Story Shear Force Ratios of the lateral force resisting members can be checked or modified in a spreadsheet format table.
- When "Story Shear Force Ratio>Consider Story Module" is checked in the "Model/Building/Control Data", accurate shear forces can be obtained for the story having the overlapping Module.
- When Modules are defined in Structure > Building > Story > Define Module button, the Module data is displayed in the first column of the table.
- "Story Shear Force Ratio" in "Model/Building/Control Data" must be checked for this function, which is checked as the Default.
Note
If Pushover analysis has been performed, Story Shear Force ratios of members resulting from the Pushover analysis can be checked.
The distribution ratios are expressed in terms of resistance by column members (Frame_Beam), brace members (Frame_Truss) and shear wall members (Wall).
Note
If the structure contains Planar and Solid elements, the ratios are classified separately into Planar and Solid.
Table Tool in Gen NX offers a variety of powerful built-in functions. Refer to Usage of Table Tool for detail directions.
Call
From the Main Menu select [Results] tab > [Type : Analysis Result] > [Table] group > [Story Tables] > [Story Shear Force Ratio Table]
Input
Select static load cases from the Records Activation Dialog, and click the OK button.
Refer to Usage of Table Tool and check the following data:
When Modules are not defined
Story : Story ID
Level : Story elevation level
Load : Static lateral load (Static Seismic Load, Wind Load)
Type : Element type
Frame(Beam) : Column member
Frame(Truss) : Brace member
Note
Brace members(Frame_Truss) contain Truss, Tension only, Compression only elements.
Wall : Shear wall member
No : Element number
Angle 1([deg]) : Angle of a shear force component.
Force 1(tonf) : Shear force in the direction of Angle 1
Ratio 1 : Shear force distribution ratio in the direction of Angle1
Angle 2([deg]) : Angle1 + 90°
Force 2(tonf) : Shear force in the direction of Angle 2
Ratio 2 : Shear force distribution ratio in the direction of Angle2
Input angle and press the 'Apply' button to change angle : Input the angle of a shear force component (Angle 1), and click the Apply button. You can then observe the shear forces and distribution ratios in the direction of the corresponding input angle.
Note 1
Angle1 determines the reference direction to calculate the shear force. If Angle 1 is consistent with the loading direction, the story shear is consistent with the inputted load, and the distribution ratios, which are contributed by the members, can be checked.
Note 2
The story shear force due to response spectrum loads is obtained by combining the story shear
forces of each mode using the modal combination method.
[Frame] and [Wall] in the Summation of Story Shear Force () represent the summation of all shear forces of Frame and Wall respectively for the corresponding story. Therefore, the summation of ratios of Frame and Wall would be always 1.0.
When Modules are defined
Module : Module name is defined in Structure > Building > Story > Define Module button
Story : Story ID
Level : Story elevation level
Load : Static lateral load (Static Seismic Load, Wind Load)
Type : Element type
Frame(Beam) : Column member
Frame(Truss) : Brace member
Note
Brace members(Frame_Truss) contain Truss, Tension only, Compression only elements.
Wall : Shear wall member
No : Element number
Angle 1 ([deg]) : Angle of a shear force component.
Force 1 (tonf) : Shear force in the direction of Angle 1
Ratio 1 : Shear force distribution ratio in the direction of Angle1
Angle 2 ([deg]) : Angle1 + 90?/p>
Force 2 (tonf) : Shear force in the direction of Angle 2
Ratio 2 : Shear force distribution ratio in the direction of Angle2
Input angle and press 'Apply' button to change angle : Input the angle of a shear force component (Angle 1), and click the Apply button. You can then observe the shear forces and distribution ratios in the direction of the corresponding input angle.
Note 1
Angle1 determines the reference direction to calculate the shear force. If Angle 1 is consistent with the loading direction, the story shear is consistent with the inputted load, and the distribution ratios, which are contributed by the members, can be checked.
Note 2
The story shear force due to response spectrum loads is obtained by combining the story shear forces of each mode using the modal combination method.
[Frame] and [Wall] in the Summation of Story Shear Force represent the summation of all shear forces of Frame and Wall respectively for the corresponding story. Therefore, the summation of ratios of Frame and Wall would be always 1.0