Consider the simply supported beam shown below which is subjected to the specified (unfactored)
loads shown in the figure. Both loads are unfactored and the self-weight has been included.
a) Draw the shear force envelope using the load case 1.25D + 1.5L
Note: use the clear span “ln” when determining the shear diagram.
Note: Calculate the critical shear at dv from the face of the support and show it on the diagram.
b) Design the beam for shear using 2 regions as follows:
Region 1: U-shaped 10M stirrups with 2 legs to resist the max shear at dv from the support.
Region 2: without any shear reinforcement (with Vr = Vc using concrete only)
Note:
make sure design in region 1 meets: Vr ≥Vf @dv, Av ≥ Avmin , s ≤ smax and Vr < Vrmax and Show your design on a neat sketch and show where each region starts and ends.
Consider The Simply Supported Beam Shown Below Which Is Subjected To The Specified Unfactored Loads Shown In The Figur 1 (12.97 KiB) Viewed 44 times
W, = 50 KN/m (dead - unfactored, includes self-weight) W = 35 KN/m (live-unfactored) Region 1 Region 2 f'c = 30 MPa Fy = 400 MPa h = 700 mm b = 350 mm 10M stirrups (2 legs) 4-20M bars (bottom) Clear cover = 40 mm (bottom) Max aggregate - 20 mm 500 mm 7500 mm (centre-to centre)
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