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What is Modular Ratio? Modular Ratio in RCC(Reinforced Cement Concrete)




Modular Ratio is defined as the Ratio between Modulus of Elasticity of Steel and Modulus of Elasticity of Concrete. This is because, a Reinforced Concrete is made up of Both Steel and Concrete. In this case, Steel is a Tension member and Concrete is a Compression Member. When Load is applied, a Rcc member seem to carry same load but strain produced in it is different. As per IS456:2000




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9 Respones to "What is Modular Ratio? Modular Ratio in RCC(Reinforced Cement Concrete)"

Mishro Sumathi said...

modular ratio is a ratio of two different materials of elastic moduli.so it has no units.But, according to is456:2000 the formula is m=280/(3fcbc).the units for fcbc is N/mm^2..from this m get the units mm^2/N.. right??


March 6, 2016 at 12:15 AM
alok modi said...

No,m has no unit because 280/3 comes out by using elastic modulii in steel(2000MPa or N/mm2)& max allowable strain in concrete(unitless quantity).that's why 280/3 has unit of N/mm2 which will cancel out by unit of elasticity of concrete . Finally m is constant value no unit.


May 1, 2016 at 1:27 PM
Mishro Sumathi said...

thnQ Mr.Alok Modi


May 2, 2016 at 9:08 AM
Salik Diwan said...

What is value of m for rcc beam having m20 and fe 415? ?


February 16, 2017 at 9:41 PM
ALi Javid said...

For m20 value of fcbc is 7 then m=280/(3*7)=13.33


March 13, 2017 at 12:04 AM
Unknown said...

What r the Defects.of modular ratio


March 24, 2017 at 12:51 AM
Unknown said...

What r the Defects.of modular ratio


March 24, 2017 at 12:52 AM
Unknown said...

By using m=280/3fcbc for m25 grade of concrete is 10.98 but by ratio of higest elastic moduli is 8. Is this correct, Because both the way is should be same,else which value should be taken while solving problems.


May 4, 2017 at 12:39 AM
Unknown said...

By using m=280/3fcbc for m25 grade of concrete is 10.98 but by ratio of higest elastic moduli is 8. Is this correct, Because both the way is should be same,else which value should be taken while solving problems.


May 4, 2017 at 12:40 AM

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