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In the limit state method, balanced design of a reinforced concrete beam gives
- a)smallest concrete section and maximum area of reinforcement
- b)largest concrete section and maximum area of reinforcement
- c)smallest concrete section and minimum area of reinforcement
- d)largest concrete section and minimum area of reinforcement
Correct answer is option 'A'. Can you explain this answer?
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Limit State Method in Reinforced Concrete Design
Limit State Method is a popular method used for the design of reinforced concrete structures. This method is based on the concept of limiting the probability of failure of the structure under various load conditions. The two main limit states that are considered in the design are:
- Ultimate Limit State (ULS): This is the limit state where the structure is expected to collapse or suffer a major failure. The design should ensure that the structure can withstand the maximum load that it is expected to carry without suffering any major failure.
- Serviceability Limit State (SLS): This is the limit state where the structure is expected to perform its intended function without any significant deformation or cracking. The design should ensure that the structure can withstand the expected loads without any significant deformation or cracking.
Balanced Design of Reinforced Concrete Beam
In reinforced concrete design, a balanced design of a beam is one where the steel reinforcement and the concrete are stressed to their full strength capacity at the same time. This is achieved by selecting the appropriate cross-sectional dimensions of the beam and the amount of steel reinforcement.
In a balanced design, the following conditions are satisfied:
- The maximum compressive stress in the concrete is equal to the maximum tensile stress in the steel reinforcement.
- The depth of the neutral axis of the section is at a distance of d/2 from the top of the section, where d is the overall depth of the section.
Advantages of Balanced Design
- It leads to an economical design of the structure since it uses the minimum amount of materials required to achieve the required strength and stiffness.
- It ensures that the structure is safe and reliable under the expected loads.
Answer Explanation
In a balanced design of a reinforced concrete beam, the cross-sectional dimensions of the beam and the amount of steel reinforcement are selected such that the maximum compressive stress in the concrete is equal to the maximum tensile stress in the steel reinforcement. This leads to the smallest possible concrete section and the maximum area of reinforcement. Therefore, the correct answer is option A.
Limit State Method is a popular method used for the design of reinforced concrete structures. This method is based on the concept of limiting the probability of failure of the structure under various load conditions. The two main limit states that are considered in the design are:
- Ultimate Limit State (ULS): This is the limit state where the structure is expected to collapse or suffer a major failure. The design should ensure that the structure can withstand the maximum load that it is expected to carry without suffering any major failure.
- Serviceability Limit State (SLS): This is the limit state where the structure is expected to perform its intended function without any significant deformation or cracking. The design should ensure that the structure can withstand the expected loads without any significant deformation or cracking.
Balanced Design of Reinforced Concrete Beam
In reinforced concrete design, a balanced design of a beam is one where the steel reinforcement and the concrete are stressed to their full strength capacity at the same time. This is achieved by selecting the appropriate cross-sectional dimensions of the beam and the amount of steel reinforcement.
In a balanced design, the following conditions are satisfied:
- The maximum compressive stress in the concrete is equal to the maximum tensile stress in the steel reinforcement.
- The depth of the neutral axis of the section is at a distance of d/2 from the top of the section, where d is the overall depth of the section.
Advantages of Balanced Design
- It leads to an economical design of the structure since it uses the minimum amount of materials required to achieve the required strength and stiffness.
- It ensures that the structure is safe and reliable under the expected loads.
Answer Explanation
In a balanced design of a reinforced concrete beam, the cross-sectional dimensions of the beam and the amount of steel reinforcement are selected such that the maximum compressive stress in the concrete is equal to the maximum tensile stress in the steel reinforcement. This leads to the smallest possible concrete section and the maximum area of reinforcement. Therefore, the correct answer is option A.
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In the limit state method, balanced design of a reinforced concrete beam givesa)smallest concrete section and maximumarea of reinforcementb)largest concrete section and maximum area of reinforcementc)smallest concrete section and minimum area of reinforcementd)largest concrete section and minimum area of reinforcementCorrect answer is option 'A'. Can you explain this answer?
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