Beam Design

1. Chapter 6 – Beam Design

2. Design Process

3. Design Process

4. Design Life (EN 1990)

5. Exposure Class (EN 1992-1-1)

6. Fire Resistance (EN 1992-1-2)

7. Material Strength (EN 206-1)

8. Beam Size?
Overall depth ratios of 13-18 and width of 0.3-0.6 are generally
found to be economical in the case of simply supported and
continuous beam.

9. Beam Size? (EN 1992-1-2)

10. Beam Size? (EN 1992-1-2)

11. Action Distribution

12. Action Calculation

13. Alternative method for Slab
Action
 Slab shear coefficient from Table 3.15
BS 8110
 Yield Line Analysis
 Table 63 Reinforced Concrete Designer’s
Handbook by Reynold

14. Shear Coefficient Method

15. Shear Coefficient Method

16. Shear Coefficient Method

17. Example: 𝐿𝑦/𝐿𝑥 = 1.5

18. Effective Span, 𝑙𝑒𝑓𝑓

19. Effective Span, 𝑙𝑒𝑓𝑓

20. Example 1
A rectangular reinforced concrete beam is simply supported
on two masonry walls 250 mm thick and 8.0 m apart (clear
distance). The beam has to carry a distributed permanent
action of 15 kN/m (excluding beam self-weight) and a
variable action of 10 kN/m. The beam is inside buildings
subjected to a 1-hour fire resistance and designed for 50
years design life. Design the beam.

21. Simply Supported Beam
(example1)
Assure tension rebar = 20mm, compression rebar=12mm
and shear link = 8mm

22. Solution: Beam Size

23. Solution: Concrete Cover

24. Solution: Loading

25. Solution: Main Reinforcement

26. Solution: Main Reinforcement

27. Solution: Main Reinforcement

28. Solution: Shear Reinforcement

29. Solution: Shear Reinforcement

30. Solution: Shear Reinforcement

31. Solution: Shear Reinforcement

32. Solution: Deflection

33. Solution: Deflection

34. Solution: Deflection

35. Solution: Cracking

36. Solution: Detailing

37. Example 2

38. Example 1: Design Data

39. Example 1: Effective Width

40. Example 1: Loading on Slab

41. Example 1: Loading on Slab

42. Example 1: Loading on Beam

43. Example 1: Main Reinforcement

44. Example 1: Main Reinforcement

45. Example 1: Cross Section

46. Example 1: Other Solutions

47. Continuous Beams
 Are the ones that rest on more than two
supports and a common element in in-
situ construction.

48. Continuous Beams

49. Continuous Beam
Mode of deflection
Bending Moment Diagram
Location of Reinforcement
Cracking
Cracking
External Beam Internal Beam Internal Beam

50. Load Arrangement
 Variables actions can usually cover all or
any span of a continuous beam.
 Therefore a continuous beam should be
analyzed for the loading arrangements
which give the maximum stresses at each
section.

51. Continuous Beam

52. Continuous Beam – Shear Force
Coefficient

54. Continuous Beam
1.35Gk + 1.5 Qk
1.35Gk + 1.5 Qk

55. Continuous Beam

56. Continuous Beam
1.35Gk + 1.5 Qk
1.35Gk + 1.5 Qk

57. Continuous Beam

58.  LOAD SET 1 is the recommended
arrangement given by EC2: Section 5.1.3.
 To consider this load arrangement, more
than 3 load cases have to be assessed.
 However, Malaysia National Annex allows
the use of LOAD SET 2 which requires only
3 load cases to be assessed.

59. Continuous Beam

60. Continuous Beam

61. Continuous Beam

62. Example 3

63. Example 3: Design Data

64. Example 3: Solution

65. Example 3: Solution

66. Example 3: Solution

67. Example 3: Solution

68. Example 3: Solution

69. Example 3: Solution

70. Example 3: Solution

71. Example 3: Solution

72. Example 3: Solution

73. Example 3: Solution

74. Example 3: Solution

75. Example 3: Solution

76. Example 3: Solution

77. Example 3: Solution

78. Example 3: Solution

79. Example 3: Solution

80. Example 3: Solution

81. Example 3: Solution

82. Example 3: Solution

83. Example 3: Solution

84. Example 3: Solution

85. Example 3: Solution

86. Example 3: Solution

87. Example 3: Solution
Check deflection @ Span A-B

88. Example 3: Solution

89. Example 3: Solution

90. Example 3: Solution

91. Example 4

92. Example 4: Solution

93. Example 4: Solution

94. Example 4: Solution

95. Example 4: Solution

96. Example 4: Solution

97. Example 4: Solution

98. Example 4: Solution

99. Example 4: Solution

100. Example 4: Solution

101. Example 5

102. Example 5: Solution

103. Example 5: Solution

104. Example 5: Solution

105. Example 5: Solution

106. Example 5: Solution

107. Example 5: Solution

108. Example 5: Solution

109. Example 5: Solution

110. End of Chapter 5