In large Bridge one end is kept fixed and the other rests on roller. explain why?
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Answer:
Answer. when we have rollers at one end then it is allowed to expand freely without any thermal stress.in summers the bridges may expand due to the increase in the temperature and in winters the bridges may compress due to decrease in the temperature.
Steel girder are used to construct a bridge. One girder is fixed in a concrete while the other end is not fixed in concrete. It is supported on rollers so that if there is any changes in the temperature during change of seasons, girders may contract or expand without affecting the concrete.
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Answer:
when we have rollers at one end then it is allowed to expand freely without any thermal stress.in summers the bridges may expand due to the increase in the temperature and in winters the bridges may compress due to decrease in the temperature.
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