Section steel and wall body using the section steel

Abstract

An object of the present invention is to obtain a shaped steel beam having a strong bonding force with respect to concrete, and to obtain a wall with a reduced thickness. An H-beam has a plurality of projections on an inner face, and satisfies the conditions P/h≦10 and P/b 2 ≧4, where b 2 represents the upper-side width of the projections, h represents the projection height, and P represents the projection pitch in a cross section perpendicular to the inner face having the projections. A wall uses the H-beam as a structural member. In the wall, H-beams stand at a plurality of positions in the longitudinal direction of the wall with outer faces of flanges pointing toward the surface of the wall.

1 . A shaped steel beam having a plurality of projections on an inner face, and satisfying the following expressions:  
       P/h≦10 and P/b 2 ≧4  
     where b 2  represents the upper-side width of the projections, h represents the height of the projections, and P represents the pitch of the projections in a cross section perpendicular to the inner face having the projections.  
   
   
       2 . A shaped steel beam having a plurality of projections on an inner face, and satisfying the following expressions:  
       2 mm≦h≦50 mm and 4b 2 ≦P≦10h  
     where b 2  represents the upper-side width of the projections, h represents the height of the projections, and P represents the pitch of the projections in a cross section perpendicular to the inner face having the projections.  
   
   
       3 . A shaped steel beam having a plurality of projections on an inner face, and satisfying the following expressions:  
       2 mm≦h≦50 mm and 4b 1 ≦P≦10h  
     where b 1  represents the lower-side width of the projections, h represents the height of the projections, and P represents the pitch of the projections in a cross section perpendicular to the inner face having the projections.  
   
   
       4 . A shaped steel beam having an H-shape and standing as a structural element of a steel-concrete wall at each of a plurality of positions in a longitudinal direction of the wall with surfaces of webs of adjacent shaped steel beams opposing one another, wherein the shaped steel beam includes a plurality of projections on an inner face of a flange, and satisfies the following expressions:  
       P/h≦40 and P/b 2 ≧4  
     where b 2  represents the upper-side width of the projections, h represents the height of the projections, and P represents the pitch of the projections in a cross section perpendicular to the inner face having the projections.  
   
   
       5 . A shaped steel beam having an H-shape and standing as a structural element of a steel-concrete wall at each of a plurality of positions in a longitudinal direction of the wall with surfaces of webs of adjacent shaped steel beams opposing one another, wherein the shaped steel beam includes a plurality of projections on an inner face of a flange, and satisfies the following expressions:  
       2 mm≦h≦50 mm and 4b 2 ≦P≦40h  
     where b 2  represents the upper-side width of the projections, h represents the height of the projections, and P represents the pitch of the projections in a cross section perpendicular to the inner face having the projections.  
   
   
       6 . A shaped steel beam having an H-shape and standing as a structural element of a steel-concrete wall at each of a plurality of positions in a longitudinal direction of the wall with surfaces of webs of adjacent shaped steel beams opposing one another, wherein the shaped steel beam includes a plurality of projections on an inner face of a flange, and satisfies the following expressions:  
       2 mm≦h≦50 mm and 4b 1 ≦P≦40h  
     where b 1  represents the lower-side width of the projections, h represents the height of the projections, and P represents the pitch of the projections in a cross section perpendicular to the inner face having the projections.  
   
   
       7 . The shaped steel beam according to  claim 1 , wherein bonding-force increasing means is provided on a surface of a web.  
   
   
       8 . The shaped steel beam according to  claim 1 , wherein the following condition is satisfied:  
       h≦b 1    
     where b 1  represents the lower-side width of the projections.  
   
   
       9 . The shaped steel beam according to  claim 1 , wherein the projections are provided on an inner face of a flange and a surface of a web, and the projections provided on the inner face and the surface are combined.  
   
   
       10 . A wall using, as a structural element, a shaped steel beam according to  claim 1 , wherein the shaped steel beam stands at each of a plurality of positions in the longitudinal direction of the wall with an outer face of a flange pointing toward a surface of the wall.  
   
   
       11 . The wall according to  claim 10 , wherein adjacent shaped steel beams are coupled by a coupling member.  
   
   
       12 . The wall according to  claim 10 , wherein horizontal reinforcements are provided at a plurality of positions in the height direction of the wall so as to be in contact with the outer faces of the flanges of the shaped steel beams.  
   
   
       13 . The wall according to  claim 12 , wherein a main reinforcement is provided between the adjacent shaped steel beams and inside the horizontal reinforcements so as to cross the horizontal reinforcements in contact therewith.  
   
   
       14 . The wall according to  claim 12 , wherein the horizontal reinforcements are fixed to the outer faces of the flanges of the shaped steel beams.  
   
   
       15 . The wall according to  claim 13 , wherein the horizontal reinforcements are fixed to the outer faces of the flanges of the shaped steel beams.  
   
   
       16 . The shaped steel beam according to  claim 2 , wherein bonding-force increasing means is provided on a surface of a web.  
   
   
       17 . The shaped steel beam according to  claim 3 , wherein bonding-force increasing means is provided on a surface of a web.  
   
   
       18 . The shaped steel beam according to  claim 4 , wherein bonding-force increasing means is provided on a surface of a web.  
   
   
       19 . The shaped steel beam according to  claim 5 , wherein bonding-force increasing means is provided on a surface of a web.  
   
   
       20 . The shaped steel beam according to  claim 6 , wherein bonding-force increasing means is provided on a surface of a web.