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reinforced concrete prise
A singly reinforced beam only has steel reinforcement on the tension side (along the bottom of the cross section) where as a doubly reinforced beam has steel reinforcement on both the tension and compression sides, ie. the top and bottom of the cross section.
Reinforced concrete is made by placing steel bars in the tension zone of the beam x-section.
bottom
It all depends on the dimensions of the steel beam
Dasign of T- beam is some what similar to rectangular beam, in design slab thickness is determined first. the slab is acts as compression flange in designing the beam. the flange acts as compression zone, which is balance by steel embeded in the bottom web of the beam. slab thickness= t, in. effective depth= d, in. width of web= b', in. flange width= b, in. width of flange should be least of the three alternatives, 1. span/4. 2. b' + 16t. 3. centre to centre spacing of beams.
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reinforced concrete prise
A singly reinforced beam only has steel reinforcement on the tension side (along the bottom of the cross section) where as a doubly reinforced beam has steel reinforcement on both the tension and compression sides, ie. the top and bottom of the cross section.
It proves shear reinforcement in the beam.
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when our demand is more than capacity then designer prefers to choose doubly reinforced beam .for example your maximum moment is greater than nominal momentthen doubly reinforced beam is used.
this a type of beam which contain the depth of slab in its depth. and if you want to decrease the depth of beam then just design it again reducing the depth from 12 inch to 8 inch it will change the required area of steel and grade of concrete. thats it
to resist shear force
Reinforced concrete is made by placing steel bars in the tension zone of the beam x-section.
The vertical portion of the I-beam resists shear force better than a rectangular one. The "I" portion also deflects force because of its design.
because of the cement that can hold them tightly