Composite structural member with longitudinal structural haunch

Abstract

A composite structural member with a longitudinally extending structural haunch. The composite structural member comprises a plurality of longitudinally extending girders with molded sections disposed thereon. The molded section comprises a molded deck portion having a plurality of longitudinally extending structural haunches extending downwardly therefrom. Each haunch is disposed on a corresponding girder. The haunches are molded around shear connectors attached to the girders. The resulting structure has greater strength properties than a corresponding prior art structure having no haunch, the same deck thickness and substantially the same overall height and girder weight.

1 . A structural apparatus comprising: 
 a plurality of girders extending in a longitudinal direction, said girders being spaced from one another in a transverse direction with respect to said girders;    a molded section disposed above said girders, said molded section comprising: 
 a deck portion disposed at least partially above said girders; and  
 a plurality of longitudinally extending, structural haunches extending downwardly from said deck portion, each haunch being attached to a corresponding girder.  
   
   
   
       2 . A structural apparatus comprising: 
 a plurality of girders extending in a longitudinal direction, said girders being spaced from one another in a transverse direction with respect to said girders;    a molded section disposed above, and made composite with, said girders, said molded section comprising: 
 a deck portion disposed above said girders; and  
 a plurality of longitudinally extending, structural haunches extending downwardly from said deck portion, each haunch being compositely attached to a corresponding girder, wherein the ultimate resisting moment of said composite girders increases as the girder depth decreases an amount and the haunch space between the bottom of the deck portion and the tops of the girders is increased the same amount for the same girder area and shape and total depth between the bottom of the deck and the bottoms of the girders.