1- A rectangular beam reinforced with 4 o18 bars has h=650mm, bw=250mm and d'=30mm. Applied moment is 67 kN.mMaterials used are C25 and S220. Allowable compressive stress and modulus of rupture for concrete are 10MPA and 2.3 N/mm2 respectively. Allowable stress for steel is 140 MPa. Is this beam cracked or uncracked? Is this beam designed adequately to carry the applied moment safely?
1- A rectangular beam reinforced with 4 o18 bars has h=650mm, bw=250mm and d'=30mm. Applied moment is 67 kN.mMaterials used are C25 and S220. Allowable compressive stress and modulus of rupture for concrete are 10MPA and 2.3 N/mm2 respectively. Allowable stress for steel is 140 MPa. Is this beam cracked or uncracked? Is this beam designed adequately to carry the applied moment safely?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![Exercises
1- A rectangular beam reinforced with 4 o18 bars has h=650mm, bw=250mm and
d'=30mm. Applied moment is 67 kN.mMaterials used are C25 and S220. Allowable
compressive stress and modulus of rupture for concrete are 10MPA and 2.3 N/mm2
respectively. Allowable stress for steel is 140 MPa. Is this beam cracked or
uncracked? Is this beam designed adequately to carry the applied moment safely?
2- Does this beam have enough capacity to carry the applied moment? Also, calculate the
position of neutral axis. h=50cm, bw= 25 cm, and d'=3cm. C25 and S420 are used.
(kı= 0.85; fod= 17 MPa; fya=365 MPa; E= 2X10°N/mm?)
DL= 30 kN/m
LL= 15 kN/m
4Ф 22
5.3 m
3- Calculate the moment carrying capacity of the beam shown? Choose the required steel
reinforcement to carry this moment. d=470mm b= 270mm and d'=30mm.
C20: Allowable stress=7MPA
S420: Allowable stress=220 MPa
A,
n=15](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4b43d65b-91b5-4000-9bf5-c3f2803268a6%2F87248797-e349-451e-8973-1e56b5b01f14%2Fn2ic7ni_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Exercises
1- A rectangular beam reinforced with 4 o18 bars has h=650mm, bw=250mm and
d'=30mm. Applied moment is 67 kN.mMaterials used are C25 and S220. Allowable
compressive stress and modulus of rupture for concrete are 10MPA and 2.3 N/mm2
respectively. Allowable stress for steel is 140 MPa. Is this beam cracked or
uncracked? Is this beam designed adequately to carry the applied moment safely?
2- Does this beam have enough capacity to carry the applied moment? Also, calculate the
position of neutral axis. h=50cm, bw= 25 cm, and d'=3cm. C25 and S420 are used.
(kı= 0.85; fod= 17 MPa; fya=365 MPa; E= 2X10°N/mm?)
DL= 30 kN/m
LL= 15 kN/m
4Ф 22
5.3 m
3- Calculate the moment carrying capacity of the beam shown? Choose the required steel
reinforcement to carry this moment. d=470mm b= 270mm and d'=30mm.
C20: Allowable stress=7MPA
S420: Allowable stress=220 MPa
A,
n=15
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