Question

A 1200 mm deep by 750 mm wide post-tensioned simply supported
beam is shown below. The beam spans 12.0 m and is subject to a
superimposed dead load of 50 kN/m and a live load of 35 kN/m. Both
the superimposed dead load and live load are applied after transfer
(after stressing has taken place). The tendon is located at the
mid-height of the beam at each end, and its centreline sits 50 mm
from the base at midspan. The concrete strength at transfer is 22
MPa, and at maturity is 40 MPa. Assume
** E_{c}** = 32800 MPa,

c)
Estimate the approximate total short-term and long-term deflection
under the load combination **G + 0.7Q**. Assume
** P_{i}** = 1750 kN and

Answer #1

Design a T Beam for s floor system. Thickness of slab is 75 mm
and width of the web is 375 mm, with an effective depth of 600 mm.
The beam carries a dead load moment of 270 KN m and a live load
moment of 460 KN m. The beam has a span of 5.4 m and has a spacing
center to center equal to 1.8 m, fc’ = 20.7 MPa, fy = 345 MPa.

A 5.3m long simply supported beam is subjected to a dead load of
23 and live load of 28 kN/m. If the beam has width, height and
concrete cover of 25cm, 50cm and 3cm respectively, design this
beam. Use C25 and S220. (if required; k1=0.85 and d’’=2cm)

Design the shown beam; if it is given that
Dead load, wd = 15 kN/m
Live load, wL = 10 kN/m
Beam breadth b = 300 mm
Beam height, h = ℓ/21 mm
where; Span, ℓ = 9; and S
is the student serial number according to the following table. Use;
fc = 35 Mpa and fy = 420
Mpa.

A rectangular beam having b=300 mm and d=575 mm, spans 5.5 m
face to face of simple
supports. It is reinforced for flexure with 4φ32 bars that continue
uninterrupted to the ends of
the span. It is to carry a service dead load wD=30 kN/m (including
self-weight) and a service live
load =45 kN/m both uniformly distributed along the span. Design the
shear reinforcement using
φ10 vertical U stirrups. Use the equation (a) for Vc. Material
strengths are fc’=22 and...

A simply supported laminated composite beam of length 0.075 m
and width 5 mm made of glass/epoxy has the following layup of
[30/-30]4. Assume that each ply is 0.125 mm and material
properties are E1 = 38.6 GPa, E2 = 8.27 GPa,
G12 = 4.14 GPa, ν12 = 0.26. A uniform load of
q=0.6 KN/m is applied on the beam. What is the maximum deflection
of the beam?

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