When the area of tensile steel reinforcement in a beam is doubled, the moment of resistance of the beam will increase.
To understand why, let's consider the moment of resistance (M) of a beam, which is given by the formula:
M = (f_y * A_s * d) / γ_s
where:
f_y is the yield strength of the steel reinforcement,
A_s is the area of the tensile steel reinforcement,
d is the effective depth of the beam (distance from the extreme compression fiber to the centroid of the tensile reinforcement), and
γ_s is the safety factor for steel.
Now, if we double the area of tensile steel reinforcement (A_s), the moment of resistance (M) will increase proportionally. This is because the moment of resistance is directly proportional to the area of the tensile steel reinforcement (A_s).
By doubling A_s, the beam's ability to resist bending and handle higher loads will improve. This is a common method used to increase the strength and load-carrying capacity of reinforced concrete beams in construction.
1. If the area of tensile steel reinforcement is doubled, the moment of resistance(MOR) of the beam increases only by about 22%. Steel reinforcement bars of rebars are used to improve the concrete's tensile strength, as concrete is very low in tension but strong in compression.
OR
2.If the area of tensile steel reinforcement is doubled, the moment of resistance(MOR) of the beam increases only by about 22%.Steel reinforcement bars of rebars are used to improve the concrete's tensile strength, as concrete is very low in tension but strong in compression.Only steel is used as rebar because its coefficient of thermal expansion or elongation due to high temperature is almost equal to that of concrete.If a beam bends under load, the length of the horizontal fibre varies. This is called the internal resistance moment.
Answers & Comments
Answer:
When the area of tensile steel reinforcement in a beam is doubled, the moment of resistance of the beam will increase.
To understand why, let's consider the moment of resistance (M) of a beam, which is given by the formula:
M = (f_y * A_s * d) / γ_s
where:
f_y is the yield strength of the steel reinforcement,
A_s is the area of the tensile steel reinforcement,
d is the effective depth of the beam (distance from the extreme compression fiber to the centroid of the tensile reinforcement), and
γ_s is the safety factor for steel.
Now, if we double the area of tensile steel reinforcement (A_s), the moment of resistance (M) will increase proportionally. This is because the moment of resistance is directly proportional to the area of the tensile steel reinforcement (A_s).
By doubling A_s, the beam's ability to resist bending and handle higher loads will improve. This is a common method used to increase the strength and load-carrying capacity of reinforced concrete beams in construction.
Explanation:
Explanation:
1. If the area of tensile steel reinforcement is doubled, the moment of resistance(MOR) of the beam increases only by about 22%. Steel reinforcement bars of rebars are used to improve the concrete's tensile strength, as concrete is very low in tension but strong in compression.
OR
2.If the area of tensile steel reinforcement is doubled, the moment of resistance(MOR) of the beam increases only by about 22%.Steel reinforcement bars of rebars are used to improve the concrete's tensile strength, as concrete is very low in tension but strong in compression.Only steel is used as rebar because its coefficient of thermal expansion or elongation due to high temperature is almost equal to that of concrete.If a beam bends under load, the length of the horizontal fibre varies. This is called the internal resistance moment.