REINFORCED CONCRETE STRUCTURES

Q.Design a RC rectangular beam simply supported over an effective span of 6 m to support an imposed load of 24 kN/m inclusive of its self weight. Use M 25 grade concrete and Fe 415 steel. Provide width of the beam equal to half of the depth. Use working stress method

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Q.Design a RC rectangular beam simply supported over an effective span of 6 m to support an imposed load of 24 kN/m inclusive of its self weight. Use M 25 grade concrete and Fe 415 steel. Provide width of the beam equal to half of the depth. Use working stress method SOLUTION: Effective span l … Read more

Q.Design a RC rectangular beam simply supported over an effective span of 5m to support an imposed load of 20 kN/m inclusive of its self weight. Adopt M 20 grade concrete and Fe 415 steel. Provide effective depth 1.5 times the width. Use Working stress method

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Q.Design a RC rectangular beam simply supported over an effective span of 5m to support an imposed load of 20 kN/m inclusive of its self weight. Adopt M 20 grade concrete and Fe 415 steel. Provide effective depth 1.5 times the width. Use Working stress method SOLUTION: Effective span l = 5m Working load  w … Read more

Design a rectangular R.C.C beam to resist a bending moment of 65 kN-m. Use M 20 grade concrete and Fe 415 steel. Assume b = 0.5d

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Q.Design a rectangular R.C.C beam to resist a bending moment of 65 kN-m. Use M 20 grade concrete and Fe 415 steel. Assume b = 0.5d SOLUTION: 1. PERMISSIBLE STRESSES σcbc =7N/mm ²                               σst = 230 N / mm ²  2. … Read more

Q. Design a R.C.C beam 230 mm wide to resist a bending moment of 30 kN-m. Use M 20 grade concrete and Fe 415 steel.

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Q. Design a R.C.C beam 230 mm wide to resist a bending moment of 30 kN-m. Use M 20 grade concrete and Fe 415 steel. SOLUTION: 1. PERMISSIBLE STRESSES σcbc =7N/mm ²                               σst = 230 N / mm ²  2. DESIGN … Read more

Q.An R.C. beam 200 mm wide and 500 mm deep effective is reinforced with 3 nos. of 16 mm dia bars. Find the moment of resistance of the beam by using working stress method. Concrete grade M20 and mild steel reinforcement are used.

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Q.An R.C. beam 200 mm wide and 500 mm deep effective is reinforced with 3 nos. of 16 mm dia bars. Find the moment of resistance of the beam by using working stress method. Concrete grade M20 and mild steel reinforcement are used. SOLUTION: WIDTH b= 200mm EFFECTIVE DEPTH d = 500 mm AREA OF … Read more

Q.A reinforced concrete beam 300 mm x 600 mm overall depth is reinforced with 4 bars of 20mm diameter at an effective 600 over what uniformly distributed load this beam can carry excluding self weight, over a simply supported span of 5 m. Assume M 25 grade concrete and Fe 415 steel. Use working stress method

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Q.A reinforced concrete beam 300 mm x 600 mm overall depth is reinforced with 4 bars of 20mm diameter at an effective 600 over what uniformly distributed load this beam can carry excluding self weight, over a simply supported span of 5 m. Assume M 25 grade concrete and Fe 415 steel. Use working stress … Read more

Q. reinforced concrete beam 230 mm wide by 500 mm overall depth is reinforced with 4 bars of 12 mm diameter at an effective cover of 50 mm. Using M 20 grade concrete and Fe 415 steel, estimate the moment of resistance of the section. If the beam is simply supported over an effective span of 5m, find the maximum uniformly distributed load the beam can carry, inclusive of its own weight.

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Q. reinforced concrete beam 230 mm wide by 500 mm overall depth is reinforced with 4 bars of 12 mm diameter at an effective cover of 50 mm. Using M 20 grade concrete and Fe 415 steel, estimate the moment of resistance of the section. If the beam is simply supported over an effective span … Read more

Q.A reinforced concrete beam 300 mm wide by 550 mm overall depth is reinforced with 4 bars of 20mm diameter at an effective depth of 500 mm. Using M 20 grade concrete and Fe 415 steel, estimate the moment of resistance of the section.

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Q. A reinforced concrete beam 250 mm wide by 475 mm overall depth is reinforced with 3 bars of 16mm diameter at an effective cover of 50 mm. Using M 20 grade concrete and Fe 415 steel, find the depth of neutral axis. SOLUTION: WIDTH b= 250mm EFFECTIVE DEPTH d = 475 – 50 = … Read more

ANALYSIS OF SINGLY REINFORCED SECTIONS – Effective depth, neutral axis, Lever arm, moment of resistance and Types of sections

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ANALYSIS OF SINGLY REINFORCED SECTIONS  If the reinforced bars are provided only on tension side in the beam section, it is called as singly reinforced beams. Consider a simply supported beam subjected to bending under working loads. Since plane sections are assumed to remain plane after bending, strain is proportional to distance from the neutral … Read more

LOADS – TYPES OF LOADS REINFORCED CONCRETE STRUCTURES

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LOADS The reinforced concrete structures are designed to resist the following types of loads. (i) Dead loads (ii) Live loads or Imposed loads (iii) Wind loads (iv) Earthquake forces (v) Snow loads (vi) Shrinkage, creep and Temperature ellects. (vii) Other forces and effects DEAD LOADS Dead loads mainly due to self weight of structural members, … Read more