What is the purpose of modular ratio?
Table of Contents
- 1 What is the purpose of modular ratio?
- 2 What is the significance of modular ratio m in working stress method of analysis and design?
- 3 What is modular ratio determine the modular ratio of M30?
- 4 What is the modular ratio to be used in the analysis of RC beams using WSM If grade of concrete is M20?
- 5 What is the modular ratio to be used in the analysis of RC beams using working stress method?
What is the purpose of modular ratio?
Significance. The concept of modular ratio is very important in the computation of properties of reinforced, prestressed, jacketed, encased, and composite cross-sections. The properties of each component of the cross-section are scaled by the modular ratio of the corresponding material.
Why modular ratio is used in working stress method?
Explanation: Modular ratio: In the case of working stress method of analysis, the composite section of reinforced concrete is transformed into an equivalent section of single material of concrete. For this, we need to define modular ratio which is the ratio of elastic modulus of steel to concrete.
What is the significance of modular ratio m in working stress method of analysis and design?
Hence area of steel multiplied by modular ratio will give equivalent area of concrete,that will replace the area of steel. Hence Working stress method works on the concept of modular ratio. Modular ratio is the ratio of the Young’s modulus two dissimilar material which are combined together to support a load.
What is modular ratio m?
In the case of reinforced concrete structure modular ratio is the ratio of elasticity modulus of steel and concrete. The value of of stresses in concrete and steel is related using modular ratio. m is the modular ratio used to relate stress in reinforcement and concrete.
What is modular ratio determine the modular ratio of M30?
Calculation of Modular ratio values for different grades of concrete
| Grade of concrete | Modular ratio |
|---|---|
| M15 | m = 280/3×5 = 18.66 |
| M20 | m = 280/3×7 = 13.33 |
| M25 | m = 280/3×8.5 = 10.98 |
| M30 | m = 280/3×10 = 9.33 |
What is the modular ratio to be used in the analysis of RC beams using working stress method if the grade of concrete is M25?
As per IS 456 : 2000, using working stress method, the modular ratio of M25 grade of concrete for permissible compressive strength due to bending in concrete σcbc = 8.5 MPa is: 15.63.
What is the modular ratio to be used in the analysis of RC beams using WSM If grade of concrete is M20?
What is the modular ratio to be used in analysis of RCC beam using working stress method if the grade of concrete is M20?
Detailed Solution σ c b c for M20 is 7 MPa and the modular ratio comes out to be 13.
What is the modular ratio to be used in the analysis of RC beams using working stress method?
What is modular ratio to be used in the analysis of RC beam using working stress method if the grade of concrete is M20?
Detailed Solution. This value of the modular ratio partially takes into account the long-term effects of creep. σ c b c for M20 is 7 MPa and the modular ratio comes out to be 13.
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