Modelling of 25 storey building with the specified properties using ETABS

Ans:-

1. open etabs and click on file, new model.
2. in the pop-up set the display units and remaining parameters as shown in the figure.
3. then click on ok.
4. In the grid settings , select the required number of bays ,and other parameters.
5. then click on the custom storey data , add the required number of storey in the pop up.
6. from 1st storey to 25th storey , they are similar storeys.
7. take height 3m for each floor, plinth height 1.5m.
8. then click on ok.
9. then click define and select the material properties.
10. in the pop up select add new materials.
11. now select the region and material type.
12. in the new pop up add the requirements .
13. similarly , define redars materials.
14. now in menu bar select the section properties and select the frame sections.
15. add new property, select the desired cross section , next add all the required properties.
16. nect select its lngitudinal and the confinement bars .
17. similarly , do this process for the column sections also.
18. in the section properties ,now design the slab section.
19. add the new property , select the modelling type as the membrane.
20. provide the thickness, then click on ok.
21. select the quick draw columns,and place columns at the grid points for all the storeys.
22. and select the quick draw beams for all storeys.
23. similarly select the quick draw slabs for all similar storeys.
24. next for 1 storey select the grids and click on assign and click joint and restraints.
25. select the point supports, assign for the grid points.
26. adding the load pattens,in the definne select the load patterns, click on add new load and add all the required loads with the required properties.
27. next click on the modify lateral loads, for every load mannage the required parameters and save , click on ok.
28. assign the shell and uniform loads,
29. here we take live load of 3kn/m2 for all the floors rather than 1.5kn/m2 for the 25th floor.
30. now select all the beams by select by object type option ,next from assign select the frame loads and distributed.
31. select load patterns and add load.
32. in define select the mass source and modify.
33. add the load patterns.
34. next in define select the load combinations, add the default design combo.
35. select the concrete frame design ,by select object type and select the floors.
36. in the assign select the shell.diaphrams,modify and apply.
37. next in the analyze click on the check model and check the all the checks, click on ok.
38. now go to design mode select the joints of the number 21 and delect , then again check the model.
39. next in the analysis run the model.
40. go to display>deformed shape, deformed shape will be displayed for any particular loads.
41. go to display and click on show tables, select the modal participating mass ratio as shown in the in figure .
42. the modal participating mass ratio table has been visible.

Results:-