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Design and drawing of RC Structures CV61

2. . DETAILING OF BEAMS. 3. . Learning out Come. IntroductionSimply supported rectangular beamsContinuous rectangular beamsCantilever rectangular beamsFlanged beams. Dr.G.S.Suresh. 4. . Introduction. Carries Transverse External Loads That Cause Bending Moment, Shear Forces And In Some Cases TorsionConcrete is strong in compression and very weak in tension. Steel reinforcement is used to take up tensile stresses in reinforced concrete beams. Mild steel bars or Deformed or High yield stren30181

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Design and drawing of RC Structures CV61

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    1. 1 Design and drawing of RC Structures CV61

    2. 2 DETAILING OF BEAMS

    3. 3 Learning out Come Introduction Simply supported rectangular beams Continuous rectangular beams Cantilever rectangular beams Flanged beams

    4. Dr.G.S.Suresh 4 Introduction Carries Transverse External Loads That Cause Bending Moment, Shear Forces And In Some Cases Torsion Concrete is strong in compression and very weak in tension. Steel reinforcement is used to take up tensile stresses in reinforced concrete beams. Mild steel bars or Deformed or High yield strength deformed bars (HYSD) HYSD bars have ribs on the surface and this increases the bond strength at least by 40%

    5. Dr.G.S.Suresh 5 Introduction

    6. 6 Drawinsg generally include a bar bending schedule The bar bending schedule describes the length and number, position and the shape of the bar

    7. 7 Anchorage in steel bars is normally provided in the form of bends and hooks The anchorage value of bend of bar is taken as 4 times the diameter of bar for every 450 bend subjected to maximum of 16 times the diameter of bar.

    8. 8

    9. 9 The beams are classified as: According to shape: Rectangular, T, L, Circular etc According to supporting conditions: Simply supported, fixed, continuous and cantilever beams According to reinforcement: Singly reinforced and doubly reinforced

    10. 10 Minimum cover in beams must be 25 mm or shall not be less than the larger diameter of bar for all steel reinforcement including links. Nominal cover specified in Table 16 and 16A of IS456-2000 should be used to satisfy the durability criteria.

    11. 11 Generally a beam consists of following steel reinforcements: Longitudinal reinforcement at tension and compression face. Shear reinforcements in the form of vertical stirrups and or bent up longitudinal bars are provided. Side face reinforcement in the web of the beam is provided when the depth of the web in a beam exceeds 750 mm. (0.1% of the web area and shall be distributed equally on two faces at a spacing not exceeding 300 mm or web thickness whichever is less)

    12. 12 Specification for the reinforcement in beams is given in clause 8.1 to 8.6 of SP34

    13. 13

    14. 14

    15. 15

    16. 16

    17. 17 While drawing the details of a beam following convention representation of bars are used Mild steel bars : ?; HYSD bars: # or Main bars are shown by thick single line. Hanger bars are shown by medium thick lines.

    18. 18 Different forms of stirrups used in beams

    19. 19 Typical drawing of a simply supported beam

    20. 20

    21. 21 PROBLEM No. 1

    22. 22 PROBLEM No. 1

    23. 23 PROBLEM No. 1 contd.

    24. 24 PROBLEM No. 1 contd.

    25. 25 PROBLEM No. 2

    26. 26 PROBLEM No. 2

    27. 27 PROBLEM No. 2 contd.

    28. 28 PROBLEM No. 2 contd.

    29. 29

    30. 30 PROBLEM No. 3

    31. 31 PROBLEM No. 3

    32. 32 PROBLEM No. 4

    33. 33 PROBLEM No. 4

    34. 34

    35. 35 PROBLEM No. 5

    36. 36 PROBLEM No. 5

    37. 37 PROBLEM No. 6

    38. 38 PROBLEM No. 2

    39. 39

    40. 40 PROBLEM No. 7

    41. 41 PROBLEM No. 5

    42. 42

    43. 43 PROBLEM No. 5

    44. 44 PROBLEM No. 5

    45. 45 Do it Yourself

    46. 46 Do it Yourself

    47. 47

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