Why are bridges simply supported?

Simply Supported Bridge construction will require future removal or addition of one or more spans. ❖ They are suitable at places where uneven settlements of foundations are likely to take place. ❖ They are generally best suited for short crossings and where speed of construction is an issue.

What is the difference between simply supported slab and continuous slab?

A simply supported slab is one type of slab with its ends simply supported on two walls or beams free to bend at the ends without any restraint unlike a fixed beam. A continuous slab has number of supports at series manner. In other words a continuous slab has more than one span.

What is the difference between continuous and simply supported beam?

A simply supported beam is used when we have to transfer the load to the support in the form of linear reaction only(not bending moment). A continuous beam is used when the span is large enough and construction of component in fragment is either not plausible or is not economical.

What is a simply supported bridge?

Most commonly, simply supported bridges are single span structures with the beam ends bearing on abutments. Alternatively, a bridge may be built up of a series of simply supported spans, with the beam ends supported on either abutments or piers. Each pier will therefore support two lines of bearings.

What does simply supported mean?

Simply supported – a beam supported on the ends which are free to rotate and have no moment resistance. Fixed or Encastre – a beam supported on both ends and restrained from rotation. Over hanging – a simple beam extending beyond its support on one end.

How do you support a bridge?

Pile: A pile is a vertical support structure that’s used, in part, to hold up a bridge. It can be made of wood, concrete, or steel. A pile is hammered into the soil beneath the bridge until the end of it reaches the hard sub layer of compacted soil or rock below.

What is the effective span of a simply supported slab?

The effective span for a simply supported slab is equal to the clear span between the supports (i.e. the length up to the face of support) plus effective depth or width of the slab.

What is meant by continuous bridge?

[kən¦tin·yə·wəs ′brij] (civil engineering) A fixed bridge supported at three or more points and capable of resisting bending and shearing forces at all sections throughout its length.