Composite floor system with fully-embedded studs

Abstract

A composite floor system is provided and includes at least one lower beam, a plurality of projections and a floor slab. The at least one lower beam is made from a metallic material. The at least one lower beam has a longitudinal direction. The at least one lower beam has an upper surface. Each projection has a connection to the upper surface of the at least one lower beam. Each projection extends upwards from the upper surface of the at least one lower beam. Each projection is metallic. The floor slab is made from a cementitious material. The floor slab is in contact with the upper surface of the at least one lower beam. Each projection has a first portion that is embedded in the floor slab. Each projection has a second portion that includes the connection. The second portion is spaced from the floor slab in at least a selected longitudinal direction.

1 . A composite floor system, comprising: 
 at least one lower beam made from a metallic material, wherein the at least one lower beam has a longitudinal direction, and wherein the at least one lower beam has an upper surface;    a plurality of projections, wherein each projection has a connection to the upper surface of the at least one lower beam and wherein each projection extends upwards from the upper surface of the at least one lower beam, and wherein each projection is metallic; and    a floor slab made from a cementitious material, wherein the floor slab is in contact with the upper surface of the at least one lower beam,    wherein each projection has a first portion that is embedded in the floor slab, and wherein each projection has a second portion that includes the connection, wherein the second portion is spaced from the floor slab in at least a selected longitudinal direction.    
   
   
       2 . A composite floor system as claimed in  claim 1 , wherein the second portion of each projection is spaced from the floor slab in the selected longitudinal direction by at least a selected distance.  
   
   
       3 . A composite floor system as claimed in  claim 2 , wherein the second portion has a selected length and wherein the length of the second portion and the selected distance in the longitudinal direction are selected based at least in part on a selected ductility for the composite floor system.  
   
   
       4 . A composite floor system as claimed in  claim 1 , further comprising a plurality of spacers, wherein each spacer is positioned between the second portion of one of the projections and the floor slab, and wherein each spacer is made from a material that permits deformation of the projection in at least the selected longitudinal direction.  
   
   
       5 . A composite floor system as claimed in  claim 4 , wherein the spacers are made from a polymeric material.  
   
   
       6 . A composite floor system as claimed in  claim 5 , wherein the spacers are made from a foam rubber.  
   
   
       7 . A composite floor system as claimed in  claim 4 , wherein the spacers are adhered to the at least one lower beam.  
   
   
       8 . A composite floor system as claimed in  claim 4 , wherein the spacers are adhered to the projections.  
   
   
       9 . A composite floor system as claimed in  claim 1 , wherein the at least one lower beam is an I-beam.