Etabs+and+Safe+Course by Muhammad Ahmed Javed.pptx

nutiutouto

1. Outline Introduction to the Structural Design Description of the Project worked on Determination of the dimensions of the structural elements Introduction to ETABS 2016 ETABS model Earthquake loads Columns and Shear Walls Introduction to SAFE 2016 Design of Footings Design of Slabs and Beams Deflection Short and Long term Eng. Ahmad Traboulsi ETABS & Safe course 1

2. Introduction ETABS 2016: Columns Shear Walls Earthquake design Wind design SAFE 2016: Slabs Beams Foundations Deflection Eng. Ahmad Traboulsi ETABS & Safe course 2

3. Description of the Project Residential Building 15 stories + One basement located in Lebanon F’c = 25Mpa for horizontal element (Slabs and Beams) F’c = 30 Mpa for Vertical element (Columns, Walls, and Foundations) Fy = 420Mpa (longitudinal reinforcement) Fyt = 240Mpa ( transversal reinforcement) Qa = 3kg/cm2 (Bearing capacity of soil) Height of the basement 4m Height of the typical stories 3m We use Shear Wall system for earthquake design R=5.5 Eng. Ahmad Traboulsi ETABS & Safe course 3

4. Description of the Project Assume thickness of shear walls 40cm All columns are with minimum dimensions 600x250mm We will use the ACI code for the structural design Eng. Ahmad Traboulsi ETABS & Safe course 4

5. Waffle Slab Story 1 and 2

6. Ribbed Slab Story 3

7. Flat Slab Story 4

8. Solid Slab from story 5 to 16

9. Story 1 Waffle Slab Type 1 Eng. Ahmad Traboulsi ETABS & Safe course 9

10. Story 1 Waffle Slab Type 1 Two Way We use waffle slab when we have long spans and high live load Spacing between ribs above 1m and below 2m Loads: Dead Load = 3.5 kN/m2 (Type of Slab) Live Load = 5 kN/m2 (Parking) Eng. Ahmad Traboulsi ETABS & Safe course 10 Interior without Drop Interior with Drop Exterior without Drop Exterior with Drop Spacing > 1 m L/22 L/24 L/20 L/22 Where L = L average = (Lx + Ly / 2)

11. Eng. Ahmad Traboulsi ETABS & Safe course 11 h slab 31.45cm = 32cm We need to use hidden beams so h slab = h beams h beams ?   Simply One end Two end Cant Drop L/14 L/15 L/16 L/6 Hidden L/16 L/18.5 L/21 L/8 h beam = = 38 cm So h slab = h beam = 38 cm S1=S2=1.6m; Tf = 8cm; Rw =20cm The section of the beam in story 1 is B 100x38  

12. Story 2 Waffle Slab Type 2 Two Way We use waffle slab when we have long spans and high live load Spacing between ribs below 1m Loads: Dead Load = 3.5 kN/m2 (Type of Slab) Live Load = 5 kN/m2 (Parking) Eng. Ahmad Traboulsi ETABS & Safe course 12 Interior without Drop Interior with Drop Exterior without Drop Exterior with Drop Spacing < 1 m L/27 L/30 L/24 L/27 Where L = L average = (Lx + Ly / 2)

13. Eng. Ahmad Traboulsi ETABS & Safe course 13 h slab = 27cm We need to use hidden beams so h slab = h beams h beams ?   Simply One end Two end Cant Drop L/14 L/15 L/16 L/6 Hidden L/16 L/18.5 L/21 L/8 h beam = = 38 cm So h slab = h beam = 38 cm S1=S2=0.8m; Tf = 8cm; Rw =20cm The section of the interior beam in story 2 is B 100x38 The section of the exterior beam in story 2 is B 25x75 = 2 x h slab  

14. Story 3 One Way Ribbed Slab Eng. Ahmad Traboulsi ETABS & Safe course 14

15. Story 3 Ribbed Slab One way parallel to y axis We use ribbed slab for residential Loads: Dead Load = 4.5 kN/m2 (Type of Slab) Live Load = 2 kN/m2 (residential) Eng. Ahmad Traboulsi ETABS & Safe course 15 Where L = L parallel to the ribs so h slab = 695/18.5 = 38cm h beam = 38cm B 100x38 Simply One end Two end Cant Drop L/20 L/24 L/28 L/10 Hidden L/16 L/18.5 L/21 L/8

16. Story 4 Flat Slab Eng. Ahmad Traboulsi ETABS & Safe course 16

17. Story 4 Flat Slab Flat slab easy in construction Loads: Dead Load = 3 kN/m2 (Type of Slab) Live Load = 2 kN/m2 (residential) h flat slab = L / 33 = = 20cm   Eng. Ahmad Traboulsi ETABS & Safe course 17 Where L = L average h beam = 3 x h slab = 3 x 20 = 60cm so B25x60

18. Story 5 Solid Slab Eng. Ahmad Traboulsi ETABS & Safe course 18

19. Story 5 Solid Slab Solid slab efficient in seimic Loads: Dead Load = 3 kN/m2 (Type of Slab) Live Load = 2 kN/m2 (residential) h solid slab= Perimeter / 140 = We multiply the non continuous side of the panel by 0.76   Eng. Ahmad Traboulsi ETABS & Safe course 19 h beam = 3 x h slab = 3 x 16 = 48cm so B25x50

20. Stair H stair = 18 cm we draw the stair in ETABS as solid slab Dead Load on the stair = 3 KN/m2 Live load on the stair = 4 KN/m2 Eng. Ahmad Traboulsi ETABS & Safe course 20

21. Loads on Beams Wall 20cm : Loads= 12KN/m Wall 15cm : Loads= 9KN/m Wall 10cm : Loads= 6KN/m Eng. Ahmad Traboulsi ETABS & Safe course 21

22. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 22

23. Earthquake Design Regular < 73m Static Regular > 73m Dynamic Irregular < 21m Static Irregular > 21m Dynamic Irregular number of stories 5 and above Dynamic Eccentricity between center of mass and rigidity > 20% Dynamic Eng. Ahmad Traboulsi ETABS & Safe course 23

24. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 24

25. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 25

26. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 26

27. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 27

28. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 28

29. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 29

30. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 30

31. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 31 Without shear wall With Frame and shear wall

32. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 32

33. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 33

34. Earthquake Design Eng. Ahmad Traboulsi ETABS & Safe course 34

35. Wind Velocity Wind speed in Lebanon V k = 33m/s ETABS needs velocity V in mi/h V= V k When L1 and L2 below 10m V= V k /1.35 if L1 or L2 between 10m and 20m V= V k /1.45 if L1 and L2 above 20m To convert from m/s to mi/h we multiply by 2.236 so V=51mi/h Eng. Ahmad Traboulsi ETABS & Safe course 35

36. Stiffness Modifier Eng. Ahmad Traboulsi ETABS & Safe course 36 Slab 0.25 Beams 0.35 Wall 0.5 Column 0.7

37. Story displacement Limit of story displacement = L / 500 Where L is the height of the structure on mm Eng. Ahmad Traboulsi ETABS & Safe course 37

38. Story Drift Eng. Ahmad Traboulsi ETABS & Safe course 38

39. Eng. Ahmad Traboulsi ETABS & Safe course 39 Story Drift

40. Deflection Eng. Ahmad Traboulsi ETABS & Safe course 40

41. Deflection Eng. Ahmad Traboulsi ETABS & Safe course 41

42. Deflection Eng. Ahmad Traboulsi ETABS & Safe course 42