Title:
Advanced Design Method for Concrete Bridge Deck Slabs
Author(s):
Paul F. Csagoly and John M. Lybas
Publication:
Concrete International
Volume:
11
Issue:
5
Appears on pages(s):
53-63
Keywords:
bridge decks; concrete slabs; isotropy; loads (forces); punching shear; reinforcing steels; structural design; Design
DOI:
Date:
5/1/1989
Abstract:
Historical background on elastic plate analysis and the recognition of membrane stresses that develop as a result of flexural cracking is provided. Tests carried out by the Province of Ontario, Canada, in the early 70s and the first modern design provisions incorporated in their code in 1979 are described. Results of analytical and physical research work by New York, Texas, Wyoming, and Florida, which confirmed and extended the Ontario findings, are highlighted. In particular, the Florida tests indicated the viability of super-thin slabs, the presence of membrane forces in the overhang, and the beneficial effects of a continuous parapet. The Ontario design of slabs will be incorporated in the new AASHTO Code, to be published in 1992. It is expected to save about $100 million per annum in construction costs alone.