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Self-Supporting Tower IS:802/806

In document STAAD(X) Tower Tutorials (Page 45-54)

Please note that the purpose of this tutorial is to demonstrate the general functions and locations of the tools available in STAAD(X).Tower. For further explanations and details that are not included in this tutorial, please refer to the User's Manual.

Creating a New Self-Supporting Tower

Using the IS:802/806 code.

1. After launching STAAD(X) Tower, select New from the Start ribbon tab.

The STAAD(X) Tower dialog appears.

2. Select Self-Supporting as the type of tower, then click Next >.

The Setup Wizard dialog appears.

3. Click Next > to proceed to the Tower Properties page.

4. Input the following into the Tower Properties page:

General Tower Properties Input

Tower Name Self Supporting Tower Ex IS802,806

Type of Unit Metric

Country Code INDIAN

Design Code IS:802,806

Length Unit m

Force Unit kN

Base Tower Properties Input

No. of Legs 4 Leg

Elevation At Base and Height of Tower 0 and 46 Base Face Width and Top Face Width 5.5 and 1.4

Constant Slope (unchecked)

Type of Configuration Sections

No. of Sections and Bays/Section 8 and 2

Default Bracing and Horizontals X Brace and (checked)

Click Next > to proceed to the Structural Properties page.

5. Input the following in to the Structural Properties page:

Member Properties Input

Specification and Shape (Leg Members) BIS:808 : 1989:Generic and TUBE Designation and Steel Grade (Leg Members) IS Tube 76.1X4.5 and YSt 240 Specification and Shape (Horizontal Members) BIS:808 : 1989:Generic and EA Designation and Steel Grade (Horizontal Members) ISA 50X50X6 and E 165 Specification and Shape (Diagonal Members) BIS:808 : 1989:Generic and EA Designation and Steel Grade (Diagonal Members) ISA 50X50X6 and E 165

Check the box next to Consider bracing members as Truss, select Fixed as the Support, and check the box next to Apply Selfweight Load.

6. Click Next > and then click OK.

This exits you out of the Setup Wizard and brings you to the main work area.

7. In the Model ribbon tab click the Save tool.

Your work so far has been saved. You may be prompted to save the file in a destination of your choice.

Editing the Properties

Using the IS:802/806 code.

1. In the Tower Model Explorer pane expand Physical Model > Properties and then expand both the Profiles and Materials folders.

The profiles and materials chosen for this model appear in the Tower Model Explorer pane.

2. In the Tools ribbon tab click the Structure Property Catalog tool.

The Structure Property Catalog dialog appears.

3. Input the following into the Structure Property Catalog dialog:

Standard Input

4. Click Search then scroll down and click IS Tube 76. as the designation, 7.33 as the A, and YSt 240 as the Name. Then click Add Profile + Material and close the Structure Property Catalog dialog.

The new profile and material appear in the Tower Model Explorer pane under their respective folders.

Note: Multiple profiles and materials can be added and assigned to various sections of the model. Please refer to Example 3 for a detailed step-by-step process.

5. In the Tower Model Explorer pane expand Physical Model > Objects > Sections , then click on Section 7.

The properties for section 7 of the model appear in the Properties pane.

6. Input the following into the Properties pane:

Member Section Properties Input

Leg IS Tube 76.1X3.2

TopGirt IS Tube 76.1X3.2

Diagonal IS Tube 76.1X3.2

Horizontal IS Tube 76.1X3.2

7. In the Tower Model Explorer pane right click the Sections folder and select Show Self Supported Sections Table from the pop-up menu.

Insert data as follows into the table that appears in the Output pane:

8. In the Model ribbon tab click the Save tool.

Your work so far has been saved. You may be prompted to save the file in a destination of your choice.

Adding Bracing

Using the IS:802/806 code.

1. In the Tools ribbon tab click the Face Bracing Wizard tool.

The Define Bracing Pattern dialog appears.

2. Input the following into the Define Bracing Pattern dialog:

Template Input

Prototype Bracing Pattern KBraceDown

Bracing Title KBraceDown_Training3

3. To add nodes to the bracing, input the following into the Define Bracing Pattern dialog:

Adding Bracing

Add Input

Intermediate (checked)

Intermediate Ratio 1/3

Click Add Node, then click Node 1 and Node 4 via the graphic.

A node appears on the member between Node 1 and Node 4, 1/3 of the way from the first node you selected.

4. Add nodes to the graphic as shown by first clicking Add Node then selecting the two nodes between which you want the new node to appear.

Note: Node numbers may vary depending on the order in which the nodes were created.

5. In the Member section of the Define Bracing Pattern dialog, select Redundant Horizontal, click Add Member, then select the two nodes between which you want a new member to appear. Add sub-horizontal members as shown by first clicking Add Member then selecting the two nodes between which you want the new node to appear.

Adding Bracing

6. In the Member section of the Define Bracing Pattern dialog, select Redundant Diagonal, click Add Member, then select the two nodes between which you want the new member to appear. Add diagonal members as shown.

7. Click Update.

The Define Bracing Pattern dialog closes and the custom bracing pattern is saved.

8. In the Model ribbon tab click the Save tool.

Your work so far has been saved. You may be prompted to save the file in a destination of your choice.

Adding Bracing

Adding Components

Using the IS:802/806 code.

1. In the Components ribbon tab click the T-Frame tool.

A new Mount 1 appears in the Tower Model Explorer pane, the T-frame mount appears on the model in the View pane, and its properties appear in the Properties pane.

2. In the Properties pane change the Elevation to 44 m.

3. In the Components ribbon tab click the Pipe/Dish Mount tool.

A new Mount 2 appears in the Tower Model Explorer pane, the pipe/dish mount appears on the model in the View pane, and its properties appear in the Properties pane.

4. In the Properties pane change the Elevation to 40 m.

5. In the Components ribbon tab click the Low Profile Platform tool.

A new Mount 3 appears in the Tower Model Explorer pane, the platform appears on the model in the View pane, and its properties appear in the Properties pane.

6. In the Properties pane change the Elevation to 35 m.

7. In the Tower Model Explorer pane expand Mount 3 then click on Low Profile Platform 33.5m.

The platform's properties appear in the Properties pane.

8. Input the following into the Properties pane:

Low Profile Platform Properties Input

9. In the Components ribbon tab click the Ladder tool.

A new Ladder 1 appears in the Tower Model Explorer pane, the ladder appears on the model in the View pane, and its properties appear in the Properties pane.

10. Input the following into the Properties pane:

Ladder Properties Input

Note: End Height must be entered before Start Height.

11. In the Components ribbon tab click the Feedlines tool.

Adding Components

A new Feedline 1 appears in the Tower Model Explorer pane, the feedline appears on the model in the View pane, and its properties appear in the Properties pane.

12. Input the following into the Properites pane:

Feedline Properties Input

13. To edit or add supports, go to the Tower Model Explorer Pane and expand Physical Model and right click on the Supports folder. You can add the type of support desired by selecting it from the pop-up menu.

The restraint options for the support selected appear in the Properties pane and can be edited.

Note: For this model, a fixed support was assigned in the Setup Wizard and can be seen if the Supports folder is expanded.

14. In the Model ribbon tab click the Save tool.

Your work so far has been saved. You may be prompted to save the file in a destination of your choice.

Adding Loads and Load Groups

Using the IS:802/806 code.

1. In the Tower Model Explorer pane expand Physical Model > Loads , then right click on the Load Generation Parameters folder and select Add Wind/Ice Parameters from the pop-up menu then IS:875 Definition from its pop-up menu.

A new Wind/Ice Load Def.(IS:875):1 appears in the Tower Model Explorer pane and its properties appear in the Properties pane.

2. In the Properties pane select Almora as the City/Town.

Note: Wind speed and gust factor have been automatically updated to reflect the inputted location.

Terrain, Height, Structure Size Factor [k2] Input

Terrain Category Category 2

Structure Classification C

Adding Loads and Load Groups

Expand the Load Cases drop-down menu and check the boxes next to all of the load cases.

The nine new load cases have been added as Load Groups 2 through 10 in the Tower Model Explorer pane.

3. Expand each of the new Load Groups, then right click on each of their wind/ice loads and select Assign from their pop-up menus, respectively.

The white boxes next to the wind/ice loads will turn green once they have been assigned. The new loads have been assigned to the entire structure.

4. In the Tower Model Explorer pane expand Physical Model > Loads > Load Groups , then right click the Load Group 1 folder and select Joint Load from the pop-up menu then Add Joint Load from its pop-up menu.

A new Joint Load appears in the Tower Model Explorer pane and its properties appear in the Properties pane.

5. In the Properties pane enter -1 kip for Fy.

6. In the Model ribbon tab click the Select Nodes icon and then select the top four nodes on the model in the View pane.

7. In the Tower Model Explorer pane expand Physical Model > Loads > Load Group 1 then right click Joint Load and select Assign from its pop-up menu.

The load group has been assigned to the nodes you selected.

8. In the Model ribbon tab click the Save tool.

Your work so far has been saved. You may be prompted to save the file in a destination of your choice.

Primary Load Cases and Analysis

Using the IS:802/806 code.

1. In the Tower Model Explorer pane expand Analysis > Whole Model > Load Cases , then right click the Primary folder and select Add Primary Load Case from the pop-up menu.

A new Primary LoadCase 1 appears in the Tower Model Explorer pane and the load case editor appears in the Properties pane.

2. In the Properties pane click the drop-down menu next to Load Group Type and check Select All.

The load groups appear in the Properties pane.

3. Click 1:Load Group 1, input 1.2 as the Factor, then click Add.

The load group with its assigned factor appears in the Properties pane under Selected Load Groups.

4. Click 2:Load Group 2, input 1.6 as the Factor, then click Add.

The load group with its assigned factor appears in the Properties pane under Selected Load Groups.

5. Repeat steps 3 through 6 to create the following primary load cases:

Primary LoadCase Number Load Groups and Factors

8 1:Load Group 1 (1.2) + 3:Load Group 3 (1.6)

9 1:Load Group 1 (1.2) + 4:Load Group 4 (1.6)

10 1:Load Group 1 (0.9) + 7:Load Group 7 (1.6)

The three new load cases have been added as Primary LoadCases 8 through 10 in the Tower Model Explorer pane.

6. In the Model ribbon tab click the Run Analysis tool.

The analysis results for a 1st order analysis method appear in the Output pane.

Note: You may be asked to save file in a destination of your choice prior to analysis.

Note: At least one primary load case must be defined in order to perform an analysis.

Primary Load Cases and Analysis

7. In the Tower Model Explorer pane expand Analysis then click the Whole Model folder.

The analysis options for the whole model appear in the Properties pane.

8. In the Properties pane select P-Delta Analysis as the Method then select Default as the Analysis Options.

9. In the Model ribbon tab click the Run Analysis tool.

The analysis results for the new method appear in the Output pane.

10. In the Model ribbon tab click the Check Code tool.

The code check operations appear in the Output pane.

Reviewing Results and Creating Reports

Using the IS:802/806 code.

1. In the Model ribbon tab select IS 802,806 as the Active Design Code.

2. In the Model ribbon tab click the Check Slenderness tool.

Any members which do not meet slenderness criteria per the selected code appear in the Output pane.

Tip: Selecting an entry in the Output pane will highlight the correlating member in the View pane.

3. In the Results ribbon tab click the Show All Results tool.

The design results appear in the Output pane. Members that have failed the design check are highlighted in the View pane.

4. In the Results ribbon tab click the Show Selective Result tool then select any physical member.

Design results for the selected physical member appear in the Output pane.

5. Click the Report ribbon tab.

The Report Document Map and Selected Item List panes replace the previous panes.

6. In the Report Document Map pane expand Reports > Input Data , then click and drag the Section Information item into the Selected Item List pane, as well as the Member Specification item.

Tip: While hovering in the Selected Item List pane, a red line appears to indicate where the item will be placed.

Tip: Items in the Selected Item List pane can be rearranged by clicking and dragging them into a new position.

7. Click on the Generate Report icon in the Selected Item List pane.

A report including data from your item appears in the View pane.

Reviewing Results and Creating Reports

Reviewing Results and Creating Reports

In document STAAD(X) Tower Tutorials (Page 45-54)

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