Story Shear Force Ratio

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 Results > Result Tables > Story > Define Module, 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 menbers (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 midas Gen offers a variety of powerful built-in functions. Refer to the following items for detail directions:

Usage of Table Tool

Terminology

Familiarize with Usage

Basic directions (Cell motion, selection, size control, etc.)

Data manipulation (Add, delete, modify data, etc.)

Copy/Paste data using clipboard

Supplementary Table functions

Table Sorting

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Auto-fit column width

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Supplementary functions by Table types

Node/Element Table

Results Table

From the Main Menu select Results > Result Tables > Story > Story Shear Force Ratio.

Select Result Tables > Story > Story Shear Force Ratio in the Tables tab of the Tree Menu.

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 'Apply' button to change angle: Input the angle of a shear force component (Angle 1), and click the

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 Define Module

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 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