Question
In: Civil Engineering
A prestressed concrete beam with a rectangular sectin 120 mm wide by 300 mm deep supports...
A prestressed concrete beam with a rectangular sectin 120 mm
wide by 300 mm deep supports a a live load of 3 kN/m. The spanning
over 6 m is prestressed by a straight cable carrying an effective
prestressing force of 200000 N located at an eccentricity of 55 mm,
the density of concrete 24 kN/m3. Find : (1)- The resultant stress
distribution for the centre of span cross section of the beam (2)-
the presressing force which can balance the stresses due to dead
load and live load at the soffit of the centre span section
concrete
ahave answer after 30 minuts please
Solutions
Ally Wells answered 10 months agoRelated Solutions
A post-tensioned concrete beam, 170 mm wide and 320 mm deep, is prestressed five wires of...
A post-tensioned concrete beam, 170 mm wide and 320 mm deep,
is prestressed five wires of 8 mm diameter located at constant
eccentricity of 50 mm and carrying an initial stress of 840 N/mm.
The span of the beam is 10 m. Calculate the percentage loss of
stress in wires for The beam is pretensioned and The beam is post-
tensioned. Using the following data: Es = 210 kN/mm2, Ec = 35
kN/mm, Creep coefficient = 1.6, %3D Relaxation of...
. A symmetrical rectangle box section prestressed concrete beam of external width of 300 mm and...
. A symmetrical rectangle box section prestressed
concrete beam of external width of 300
mm and external depth of 600 mm with a uniform thickness of 40 mm
is prestressed with 7
numbers straight steel wires of 7 mm diameter located at a distance
of 15 mm from the bottom
of the soffit and 5 number of 5mm diameter of the steel wires
located at the 575 mm from the
bottom of the beam . The wires were initially tensioned...
a. A symmetrical rectangle box section prestressed concrete beam of external width of 300 mm and...
a. A symmetrical rectangle box section prestressed concrete beam
of external width of 300 mm and external depth of 600 mm with a
uniform thickness of 40 mm is prestressed with 7 numbers straight
steel wires of 7 mm diameter located at a distance of 15 mm from
the bottom of the soffit and 5 number of 5mm diameter of the steel
wires located at the 575 mm from the bottom of the beam . The wires
were initially tensioned...
a. A symmetrical rectangle box section prestressed concrete beam of external width of 300 mm and...
a. A symmetrical rectangle box section prestressed concrete
beam of external width of 300 mm and external depth of 600 mm with
a uniform thickness of 40 mm is prestressed with 7 numbers straight
steel wires of 7 mm diameter located at a distance of 15 mm from
the bottom of the soffit and 5 number of 5mm diameter of the steel
wires located at the 575 mm from the bottom of the beam . The wires
were initially tensioned...
A rectangular beam has a width of 300 mm and an effective depth of 510 mm....
A rectangular beam has a width of 300 mm and an effective depth
of 510 mm. It carries Vu = 200 KN and Mu = 55 KN-m and is
reinforced with 2650 mm2. Use f’c = 21 MPa and fy = 345
MPa. Normal concrete. Express your answer in two decimal
places.
a. Compute the shear strength in KN provided by concrete using
the less conservative formula as shown. Express your answer in two
decimal places.
b. Calculate the required...
a. An unsymmetrical I section prestressed concrete beam of top flange (350 X 40 mm) in...
a. An unsymmetrical I section prestressed concrete beam of top
flange (350 X 40 mm) in size, bottom flange of (200 X 40 mm), 30mm
thickness of web and overall depth of 400 mm is prestressed with 19
numbers straight steel wires of 7 mm diameter located at a distance
of 15 mm from the bottom of the soffit and 9 numbers of straight
steel wires of 6 mm diameter located at a distance of 15 mm from
the top...
a. An unsymmetrical I section prestressed concrete beam of top flange (350 X 40 mm) in...
a. An unsymmetrical I section prestressed concrete beam of top
flange (350 X 40 mm) in size, bottom flange of (200 X 40 mm), 30mm
thickness of web and overall depth of 400 mm is prestressed with 19
numbers straight steel wires of 7 mm diameter located at a distance
of 15 mm from the bottom of the soffit and 9 numbers of straight
steel wires of 6 mm diameter located at a distance of 15 mm from
the top...
A rectangular concrete beam of width b= 600 mm, is limited by architectural considerations to a...
A rectangular concrete beam of width b= 600 mm, is limited by
architectural considerations to a maximum total depth h= 400 mm. It
= 542 kN.m. Design the umust carry a total factored load moment
Mflexural reinforcement for this member, using compression steel if
necessary. Allow 75 mm to the center of the bars from the
compression or tension face of the beam. Material strengths are
??′=27.6 ??? ??? ??=413 ?? ?.
Select reinforcement to provide the needed areas, and...
A rectangular beam 230 mm wide is subjected to the following at a section Ultimate bending...
A rectangular beam 230 mm wide is subjected to the following at
a section
Ultimate bending moment of 135 kn.m
Ultimate shear force of 90 kn
Use M25 grade of concrete and Fe 415 steel
Design a suitable
section and find the (flexural & shear) reinforcement required
in the section.
An unsymmetrical I section prestressed concrete beam of top flange (350 X 40 mm) in size,...
An unsymmetrical I section prestressed concrete beam of top
flange (350 X 40 mm) in size, bottom flange of (200 X 40 mm), 30mm
thickness of web and overall depth of 400 mm is prestressed with 19
numbers straight steel wires of 7 mm diameter located at a distance
of 15 mm from the bottom of the soffit and 9 numbers of straight
steel wires of 6 mm diameter located at a distance of 15 mm from
the top of...
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