Title:
Differential Shrinkage in Composite Beams
Author(s):
Halvard W. Birkeland
Publication:
Journal Proceedings
Volume:
56
Issue:
5
Appears on pages(s):
1123-1136
Keywords:
none
DOI:
10.14359/8133
Date:
5/1/1960
Abstract:
Due to normal aging and curing processes, shrinkage occurs in a slab when it is cast onto precast prestressed beams. This shrinkage induces stress into the composite beam and slab construction causing the beams to deflect. An analytical method is presented for predicting the sag. Equations are given for stresses on slab and beam section, shear and moment at the interface, and slope and deflec-tion. This is followed by comparison of computed values with actual values obtained from full size test beams. Values are in close agreement.