To Analysis and Design of Steel Structures using TSD

AIM: Summarize your study for the bending moment, shear force and deflection diagrams for the elements of the model

PROCEDURE:

• Initally open the Tekla file you saved previously.
• After opening the file->We start the Seismic data in the structure
• To set->go to Load panel->Under seismic load go to Seismic wizard
• Select the code spectra->Next

• A new tab opens->Check the base information of the model
• Check seismic zone and site->Click Next

• Fill all basic information as shown above. Take importance factor as 1.2 and percentage damping 5%. click next.
• Now If any plane or cliff set the structure vertical irregularities
• or else take no and click next

• On the Fundamental period->select structure as RC steel composite, automatically the value is 0.681 sec.
• Click on Next

• In seismic force resisiting system Dir1 select the type as Moment frame systems and system as->steel building with OMRF.
• In Seismic force resisting system Dir2 select the braced system ->building with SBF and concentric braces

• On the next tab->exclude the service load and crane load and select all others
• click next for combination generator.

• click on replace only combinations generated by this run to replace combinations and click next.

• select the seismic combination and click next.

• Click next and select the load combination and finish.

• Now before starting the analysis we check the factors
• Go to Analyse tab->Go to settings
• under the modification factors tab->select steel
• check in building analysis that all the factors are 1.0
• you can modify the factors if needed. But in this case we don't change the values.

• Now, to analyse the structure we need to first click on 1st order analysis.
• After select the combination and cases you want to analyze
• click on Ok
• After the analysis is done ->go to result view from the bottom right corner
• On the result panel->Go to result->moment Major->Select the axis
• It'll show the results of the bending Moment Major
• These are the loads of Effective Seismic weight

Moment major

Shear major

Axial force

• Now check for the frame members indvidually

• For now open frame 1 section
• The beams shown in red has failed so we try to check the member
• select the beam->right Click->Check member

• Click on check member->static, a list is shown here the crictal failure of beam in moment major
• So we try changing the beam sections in all cases. One by one.
• Similary do it for all other members and check for the errors

2. AIM:Based on the analysis design the members and outline the thought process in selecting the member sizes along with the foundation design

PROCEDURE:

• Now for the design of the foundation under the columns
• Go to the foundation tab
• Open the base level ->Under the foundation panel click on pade base foundation

• Select the pad base foundation->Click on the column under which you want the foundation to be placed.

• Select the column ->Right click and check members ->This foundation is failing under bending capacity

• So we try to increase the area of steel provided
• Providing 25mm dia bars with 300mm spacing and increasing the depths

• The dimension of foundation is changed to 1800mm in both X & Y direction and depth 750mm with M40 grade of concrete for correcting the bearing capacity.

• we again check the foundation and the errors are removed
• Similarly, we provide foundation to all other columns
• Select the foundation ->copy and apply to all other columns.
• Check the foundation for the errors
• All foundation are checked similarly for no errors

RESULT: Successfully desgined the foundation and the beams.