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The secondary prestressing method of the steel box girder
by down-up method
After the deck concrete has been poured
and cured in the state of that additional compressed stress is
introduced into the low flange by adopting hinged ends as fixed
ends and by the movable support downed on the simple beam system,
the method that introduce the compressing stress which is against
negative moment stress into deck concrete from fixed ends by upping
the downed support.
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Steps of constructing |
The diagram and state of each
steps used by Down-up method |
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Detailed drawing |
Connect the steel box girder
and pier at the fixed end |
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