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A beam which is fix at its end support is called
Cantilever beam
Fixed beam
Simply supported beam
Continuous beam
Fixed beam
A fixed beam is a structural member whose ends are rigidly built-in or encastr├й, meaning they cannot rotate or deflect at the supports ┬╖ This structural condition creates reactive moments that restrain the beam, making it statically indeterminate.
A fixed beam is a structural member whose ends are rigidly built-in or encastr├й, meaning they cannot rotate or deflect at the supports ┬╖ This structural condition creates reactive moments that restrain the beam, making it statically indeterminate.
MFтАЛ=12wL2тАЛ тАФ Fixed end moment for a uniformly distributed load w
MFтАЛ=8PLтАЛ тАФ Fixed end moment for a central point load P
The rigidity at the supports provides complete resistance to both vertical displacement and end rotation ┬╖ Under external loads, internal resisting moments are developed at the supports to counteract the applied bending moments ┬╖ The degree of indeterminacy for a beam fixed at both ends is 3 for a 2D plane frame, resulting in 3 redundant support reactions.
Fixed supports offer restraint against both translation and rotation.
Fixed beams are statically indeterminate structures.
They typically exhibit smaller mid-span deflections compared to simply supported beams.
The presence of support moments reduces the maximum bending moment in the span.
Higher load-carrying capacity
Reduced mid-span deflection
Sensitive to support settlement
Statically indeterminate, requiring more complex analysis
Continuous slab construction
Rigid frame connections in steel structures
A Cantilever beam is fixed at only one end, while the other remains free.
A Simply supported beam has pinned/roller supports which allow rotation.
A Continuous beam is supported by more than two supports, often creating multiple spans.
B is correct тАФ A fixed beam is one where both ends are restrained against rotation and translation, resulting in high structural rigidity.
Always remember that while fixed beams reduce deflection, they are highly sensitive to thermal expansion and foundation settlement, which can induce significant internal stresses.