Question

Knowing that the reinforced concrete beam cross section
effective depth is d = 310 mm and the properties of materials used
are f'c = 28 MPa and fy = 420MPa and the external ultimate bending
moment Mu = 254 KN.m with strain in tension steel reinforcement
equal to 0.005 . The width of the beam is Select one : a . 511 b .
385 c . 460 mm d . 640

Answer #1

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The width of a rectangular beam is 250 mm and the
effective depth is 317 mm. The tensile reinforcement is provided by
3 bars of 16 mm. Determine the moment of resistance of the section
as per limit state method.
Extracts of BS8110
grades:
Concrete 25 KN
Fcu =40 N/mm2
Fy=fyv=460 N/mm2

A reinforced concrete beam is constructed with Grade 30 concrete
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is acting on the beam. Determine (a) the design bending moment on
this beam for strength limit state, (b) modular ratio assuming Es =
200...

A simply supported reinforced-concrete beam has to resist a
maximum factored moment of M* = 210 KN-m. Given that f’c = 32 MPa,
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240 mm: a. Establish an appropriate structural depth ‘d’ for the
beam b. Determine the total depth ‘D’ of the beam for a FRL of 90
minutes c. Find the area of steel Ast required to resist the moment
and select the rebars....

Design shear reinforcement for a singly reinforced beam of 250
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A simply supported reinforced concrete beam has a width (b) of
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Problem 2
The beam given in Problem 1 has a span of 21 ft. It is supposed
to carry a uniformly distributed service dead load of 3.7 k/ft, in
addition to its...

Determine the largest allowable bending moment for a rectangular
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the centre line of steel bars = 75 mm. Use the total area of steel
As = 1360 mm2, modulus of elasticity of concrete = 30 GPa, modulus
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A rectangular beam of size 250 * 650 mm, with
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A one-way solid slab of a span of 3000 mm and a total thickness,
h, of 150 mm is subjected to a service L.L. of
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fy , is 414 MPa, the total cover of steel is 30
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