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The construction method of fabricated preflex beam
The construction method of fabricated
preflex beam is that first assemble divided and manufactured I-type
steel to be equal with displacement line when the designed load
is applied with bolts, and then after putting it on the frame in
the factory, apply the preflexion load which is about designed load.
So, You can introduce the prestressed compressing stress which is
against the tensioning stress that is occured when the designed
load applied to the positive moment section to cast and cure the
casing concrete at the lower flange of this I-type steel beam, and
in the construction place, Another compressing stress can
be introduced at the linking part of the positive moment section
to apply the secondary preflexion load to the divided preflex beam.
Manufacturing in the factory instead
of in the place, you can mass produce the preflex beams, so you
can reduce the period and the expense of the materials and improve
the quality with the better manufacturing environment.
manufacturing place |
manufacturing level |
manufacturing in the factory |
level 1 : Connect the steel
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level 2 : Apply the first
preflex load
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level 3 : Cast casing concrete
and unload
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level 4 : Divide preflex beam
and shift to construction place
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picture of experimentation
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construction in place |
level 5 : Reconnect the preflex
beam
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level 6 : Apply the secondary
preflex load
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level 7 : Cast casing concrete
of joint and unload
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level 8 : Finish the fabricated
preflex beam.
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picture of experimentation
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