2. Lesson 5: Gravity Load Path

3. Simple-Braced Building

4. All Connections Simple (pins)

5. Building System Parts/Terms

6. Building System Parts/Terms

7. Building System Parts/Terms
Column

8. Building System Parts/Terms
Fill Beam
Column

9. Building System Parts/Terms
Fill Beam
Girder
Column

10. Building System Parts/Terms
Interior Fill Beam
Interior Girder
Exterior Fill Beam
Exterior Girder
Column

11. Brace (truss)
1 Story Building

12. Slab = “Diaphragm”
Brace prevents
X-direction
Movement of this point

13. Slab = “Diaphragm” Brace prevents X-direction Movement of this point
Y-direction
Movement of this point

14. Slab = “Diaphragm” Brace prevents X-direction Movement of this point
Y-direction
Movement of this point
Slab is rigid in X-Y Plane.
Slab is connected to every other point

15. Slab = “Diaphragm” Braced Braced Braced Braced Braced Braced Braced
Slab is rigid in X-Y Plane.
Slab is connected to every other point.
Therefore: Slab + braced points = Every column is braced.
Braced

16. Slab = Diaphragm: a body that with planar rigidity
Slab = Diaphragm: a body that with planar rigidity. With several braces and a floor diaphragm, all columns are braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Braced
Slab is rigid in X-Y Plane.
Slab is connected to every other point.
Therefore: Slab + braced points = Every column is braced.
Braced

17. 1 Story Building
Beam-Column Connections: Pins
Foundations: Pins

18. 1 Story Building
mmmmm… Strangely familiar…..

19. 1 Story Building

20. 1 Story Building

21. 1 Story Building

22. 1 Story Building

23. Homework Lesson 4

24. Beam FBD’s

25. 6k 6k 6k
Beam FBD’s

26. Gravity, only
60k
60k
60k
60k
60k
60k
Beam FBD’s

27. Gravity, only
60k
60k
60k
60k
60k
60k
60k
120k
120k
60k
Column FBD’s

28. Now, Adding Lateral Force
60k
60k
60k
60k
60k
60k 0k 0k 0k
60k
120k
120k
60k
Column FBD’s

29. Now, Adding Lateral Force
60k
60k
60k
60k
60k
60k 0k 0k 6k 0k
60k
120k
120k
60k
Column FBD’s