Design a rectangular column of 3m length carrying an axial load of 76 KN.
Click ‘Design’ option of the control menu of Struds window.
Click ‘Standalone design’ option.
STRUDS displays a new window i.e. ‘Individual Design Window Application’
Click ‘Geometry’ option.
STRUDS displays ‘Define Column’ dialog box.
Key in value for ‘Element span’, 3m.
Click ‘OK’ button.
Click ‘OK’ button of ‘Define Column’ dialog box.
{VIII-1.2} Creating A New Load Combination
Click ‘Define’ menu option.Select ‘Load Combination’ option.
STRUDS displays ‘Load Combination’ dialog box.
You can create new load combinations using this dialog box as follows.
(Optional) Click ‘DL’ from the load cases.
Click ‘New’ button of load combination section.
Click ‘Add’ button of ‘Load Case’ section.
Click ‘Close’ button.
The created load combination is listed in the ‘Load Combination’ list box.
Click ‘Close’ button.
Click ‘Define’ menu option.
Select ‘Load’ option.
STRUDS displays ‘Column Load’ dialog box.
You can enter the values of axial load, Mx & My.
Key in axial load value for DL, 76kN.
Click ‘Save’ button.
Click ‘Next’ button.
(Optional) Key in values for load case LL.
Click ‘Save’ button.
Click ‘Close’ button Click ‘Section’ option.
STRUDS displays ‘Column Section’ dialog box.
Click on the ‘Rectangular shape’ icon of ‘column shape’ section.
(Optional) you can change the width & depth of the column.
Click ‘Save’ button.
Click ‘Close’ button
Click ‘Close’ button of ‘Column Section’ dialog box.
Click ‘Material’ menu option.
STRUDS displays ‘Change material for floor’ dialog box.
(Optional) Click the check box of ‘change material’ to change the grade of concrete or steel.
Click ‘Save’ button.
Click ‘Design’ menu option.
Click ‘Save’ option & save the design in strudwin / data, folder.
Click ‘View’ menu option.
Click ‘Load Combination’ option.
STRUDS displays ‘Select Load Combination’ dialog box.
Select the appropriate load combination, here select 1.5DL+1.5LL.
Click ‘View’ menu option.
Click ‘Column Loads’ option to view total load on column resulted due to the selected load combination.
{VIII-1.4} Displaying Design
Click ‘View’ menu option.Click ‘View Design’ option.
STRUDS displays ‘Column Design’ dialog box.
This window displays all the design results of the column.
These design results are displayed in table format.
At the bottom of this window are several buttons to modify/view the results displayed in the table.
Select on this button, to see the design results of the column for other load combinations.
This option allows you to change the load combination for design results. STRUDS by default designs all the column for worst load combination. In case you want to specify
This window displays a drop down menu for the floors in the building. The worst load combination for this floor is also displayed by STRUDS. Select the floor for which youwant to change the load combination for design. Click on the `Select Load Combination>>’ button.
This window displays the list of defined load combinations. Select the load combination that you want to apply to the selected column at selected floor. Click on the OK button.
STRUDS will then display the design results due to this load combination in the table. You can click on the CANCEL button to close the window without selecting the load
combination. This change in table will be reflected in design schedules by STRUDS.
This option allows you to modify the units for the values displayed in the table.
When you select this option, STRUDS displays following window.
This window has two drop down menus. The left drop down menus displays the list of items in the table for which you can change the units. The right drop down menu displays the list of unit types available for selected item. Chose the unit you want to apply for the selected item and click on the CLOSE button. STRUDS will change and display the values of the item in the table corresponding to the modified unit.
This option allows you to modify the default properties of the selected column.
When you select this option, STRUDS displays following window.
You can then modify the properties or design parameters of the selected column by using various options in this window. For detail explanation of this window, refer to the pages for PROPERTIES menu in Column Design Module.
This option allows you to visualise the cross sectional diagram of a column.
When you select this option, a box cursor appears on the screen. The column by cursor.
STRUDS displays the cross section diagram of the column on screen.
In the left portion of screen, STRUDS displays the cross section of selected column with placing of reinforcement. In the right portion of screen, STRUDS displays a list menu indicating the floor number. You can select the floor number from this list menu to see the cross section of selected column at that floor. Below this STRUDS shows the size of column, diameter + number of main bars and dia + spacing of stirrups. Select on the CLOSE option from menu bar to put off the display of cross section.
This option allows you to redesign the column if you change the properties of column by using any of following options.
1. By selecting PROPERTIES button
2. By changing P, Mx, My values in the table.
3. By changing the dimensions of column by overwriting in the table.
4. By changing bar diameter in the table.
If you have used any of the above options, first click on the SAVE button and then use this option to ask STRUDS to redesign the column with changed properties.
Select this option to save any of the changes you have made in the values in the table. You should also select this option, if you have changed any of the properties of the column to redesign it.
Select this option to close the window of VIEW DESIGN.
top has following options to specify your own properties and parameters for this selected column.
Settings
This option allows you to specify the basic parameters for design of selected column. It further has following options.
Settings – Properties
This option allows you to set the basic parameters for design of column. When you select this option, STRUDS displays the window for `Design Parameters’. For details of this window, refer to the explanation given for PROPERTIES menu of the main menu of Column Design Module.
Settings – Diameters
This option allows you to select the bar diameters for placing in the column. When you select this option, STRUDS displays following window.
This window shows the list of all available bar diameters in a vertical text column at the left side. Select the bar diameter that you want to provide for column main bars by mouse and press on the SELECT button at the right side. The selected bar diameter is shown by STRUDS in the right text column. This way you can specify the diameters that you want to provide for the column. You can specify maximum two types of bar diameters. If you want to remove any bar diameter from the list of selected bar diameters, select it by mouse and click on the DELETE button. Click on the OK button to proceed for design with chosen bar diameters. You can also click on the CANCEL button if you want to abandon the bar diameters’ selection.
Settings - Step Value
Bars
This option allows you to specify the placing of reinforcement in the selected column. It has following sub-options.
Bars - Add Dia1 Bar
This option allows you to place the bars of first diameter type in the cross sectional geometry of the column. When you select this option, a box cursor appears on the screen.
Move the cursor and click it at the positions where you want to put the bars of first type in the cross section diagram of the column.
Bars - Add Dia2 Bar
This option allows you to place the bars of second diameter type in the cross sectional geometry of the column. When you select this option, a box cursor appears on the screen.
Move the cursor and click it at the positions where you want to put the bars of second type in the cross section diagram of the column.
Bars – Delete
This option allows you to remove the bars placed in the cross sectional geometry of the column. When you select this option, a box cursor appears on the screen. Move the cursor and click it on the bar positions which you want to delete from the cross section diagram of the column.
Bars - Delete All
This option allows you to remove all the bars placed in the cross sectional geometry of the column. When you select this option, STRUDS will remove all bar types placed in the column.
Zoom
The details of this option are given in Appendix A.
Save
When you select this option STRUDS saves he changes.
The details of this option are given in Appendix B.
Close
When you select this option STRUDS closes the Current window.
This window displays a list menu indicating the floor numbers in the building. Select the floor number for which you want to modify the effective length of the selected column.
Below this are two fields indicating the factor for effective length about X and Y-axis for the column. By default the factors for effective length are 1 for both axes. However you can modify this by specifying the factor by overwriting the default values in the fields.