REINFORCED AND POST-TENSIONED CONCRETE STRUCTURES

2. REINFORCED AND POST-TENSIONED CONCRETE STRUCTURES BY : HAZAR FRAIJ SUHA AL- BRAIZAT DANA ATTILI SUPERVISED BY : Dr. HASAN TANTAWI Dr. EMHAIDY GHARAIBEH

3. …………..TO Dr. HASAN TANTAWI Dr. EMHAIDY GHARAIBEH …………..TO OUR BELOVED FATHERS AND MOTHERS

4. INTRODUCTION TO PROJECT: • Aims and expected results to our project. • Related work and team work. • Content of project. • Importance of the project.

5. Related work:

6. Types Of Bridges: • Slab and voided slab bridges. • Girder bridge. • Cantilever bridge. • Arch bridge. • Truss bridge. • Suspension bridge. • Cable stayed bridge. • Movable bridge.

7. What about bridges in Amman?

8. Girder bridge type members: Super structure members: Deck slab. Girders. Diaphragms. Approach slab. Wearing surface and parapet.

10. Sub structure members • Abutment. • Pier. • Bearings. • Back wall. • Wing wall.

12. Designed loads: • Permanent load ( dead + superimposed + pressures ) • Temporary loads (vehicle live load + wind load + impact )

13. What is the live load on bridges??

14. R.C GIRDER BRIDGE DESIGN • SUPER STRUCTURE ANALYSIS AND DESIGN. Deck slab analysis and design.

15. RESULTS OF OUR DESIGN

16. Analysis of girders Girders analysis and design: Analysis of continuous bridge for live load is by using influence lines technique. Analysis of bridge for dead load by using moment distribution method. Shear force diagram is based on 1.2 of the values in assumption of simply supported.

17. ANALYSIS OF 3 SPANS CONTINOUS GIRDERS

20. How we design the girders ??

21. Design over support

22. Design at mid of 30m span

23. Design at mid of 20m span

24. Design of approach slab • Functions of approach slab. • Principle of analysis and design of approach slab.

25. Approach slab details

26. Elastomeric bearing design • What is the elastomeric bearing?? • What is the functions of this bearing type ??

27. Basic of design of elastomeric bearing. • designed load of bearings. • Principle of analysis to design bearing. • Thickness of bearing choosing to be ≥2 of thermal expansion. • How we choose the area of bearing??

28. Shape factor = s = A/(pad circumstance x layer thickness)

29. Horizontal force exerted on structure due to by bearing • H = G x A x Δt / ERT • Shear strain must not exceed 7% and find from the following curve.

30. The designed elastomeric bearing for 2 bridges • In R.C girder bridge we found ERT =38mm and pad dimensions = 305 x 250 mm over abutment and 765x250mm over piers. • In P.C girder bridge we found ERT =5.7mm with area dimensions = 483x381 over abutment and 584x609.6mm over pier.

31. Elastomeric bearing over pier

32. COLUMN BENT PIER • TYPES OF PIERS. • WHY WE CHOOSE THIS TYPE OF PIERS? • FUNCTION OF PIERS.

33. COLUMN BENT PIER SHAPE

34. Computed live load and dead load on each girder

36. ANALYSIS AND DESIGNED LOADbending moment diagram

37. ANALYSIS AND DESIGNED LOADshear force diagram

38. Design of cap ( cantilever part)

39. Sections location

40. Sections design

41. Section c design

42. Column design • Column diameter = 1.3 m. • Column diameter found from below equations: r = D / 4 = √ I / A D = 4 L / 15 = 1.3m • We design it as short column. • The design of main steel based on minimum steel (24Ø25mm) • We use spiral tieds to resist shear.

43. COLUMN IS DESIGNED BASED ON MINIMUM REINFORCEMENT

44. HOW WE DESIGN THE FOUNDATION OF PIER?? • TWO SINGLE FOOTINGS ARE DESIGNED UNDER EACH COLUMN. • HOW WE DESIGN THIS FOOTING?? • DEPTH THAT ARE USED IN THIS FOOTING ARE 1.4 m. • AREA FOR EACH FOOTING = 16 m2

45. Plan of designed footing under column

46. System as whole ;

47. Abutment design and analysis • Abutment is a retaining structure. • We design abutment as cantilever retaining wall. • We neglect the passive earth pressure. • The most important idea is to choose area of abutment footing so that the applied service pressure on soil does not greater than net bearing capacity of soil.

48. Basic of abutment design

49. Results of designed abutment

50. Results of stem design