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Prestressed Concrete Beam

Prestressed Concrete Beam

Prestressed Concrete Beam

(OP)
Subject: Prestressed Concrete Beam (girder) in dunnage.
Top of girder is in tension.
How do we design longitudinal regular rebars (non-prestressed rebars) to resist the tension stress at top flange, need references / link.
Thanks.

RE: Prestressed Concrete Beam

There's an example of this in the 7th edition of the PCI handbook (and probably earlier editions, but that's what I have in front of me.) 5.2.2.4, pg. 5-24

It's relatively simple. Find your max tensile stress, use this combined with neutral axis depth to calculate the total tension force, and provide sufficient steel to resist it.

Brian C Potter, PE
http://simplesupports.wordpress.com

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