Beam joint device

Abstract

A beam joining apparatus for joining a flange 2 of a beam 1 to a flange 6 mounted on a pillar 5 includes a splice plate 9 fastened to the flanges 6, 2 of the pillar 5 and the beam 1 and having a central plastic region 11, and an anti-buckling member 13 mounted independently of the splice plate 9, on the splice plate 9, for preventing the buckling of the plastic region 11.

1 . A beam joining apparatus for joining a beam flange to a flange mounted on a pillar, comprising: 
 a splice plate fastened to the flanges of the pillar and the beam and having a plastic region at the central portion thereof; and    an anti-buckling member mounted on the splice plate and formed independently of the splice plate to prevent the buckling of the plastic region.    
   
   
       2 . A beam joining apparatus as set forth in  claim 1 , further comprising an anti-sticking means arranged between the splice plate and the anti-buckling member to prevent the anti-buckling member and the splice plate from sticking to each other.  
   
   
       3 . A beam joining apparatus as set forth in  claim 1 , wherein the longitudinal central portion of the splice plate has a smaller sectional area crossing the splice plate, and this particular portion has a lower yield strength than the remaining portions and forms the plastic region of the splice plate.  
   
   
       4 . A beam joining apparatus as set forth in  claim 3 , wherein the longitudinal central portion of the splice plate is formed with at least one hole.  
   
   
       5 . A beam joining apparatus as set forth in  claim 3 , wherein the splice plate has notches formed on the sides of the longitudinal central portion.  
   
   
       6 . A beam joining apparatus as set forth in  claim 3 , wherein the splice plate has notches formed on the sides of the longitudinal central portion and at least one hole arranged adjacent to the notches.  
   
   
       7 . A beam joining apparatus as set forth in  claim 2 , wherein the anti-sticking means includes an anti-sticking layer arranged between the splice plate and the anti-buckling member.  
   
   
       8 . A beam joining apparatus as set forth in  claim 7 , wherein the anti-sticking layer includes a sheet member or a film member.  
   
   
       9 . A beam joining apparatus as set forth in  claim 2 , wherein the anti-sticking member includes a means to form an air layer between the splice plate and the anti-buckling member.  
   
   
       10 . A beam joining apparatus as set forth in  claim 2 , wherein the anti-sticking means includes a lubricant coated on one of the opposed surfaces of the splice plate and the anti-buckling member.  
   
   
       11 . A beam joining apparatus as set forth in  claim 2 , wherein the anti-sticking means includes a film coated on one of the opposed surfaces of the splice plate and the anti-buckling member.  
   
   
       12 . A beam joining apparatus as set forth in  claim 1 , wherein the splice plate is mounted on at least one of the upper and lower surfaces of the flanges of the pillar and the beam.  
   
   
       13 . A beam joining apparatus as set forth in  claim 1 , 
 wherein the beam includes a web arranged in vertical direction, an upper flange formed integrally along the upper edge portion of the web, and a lower flange formed integrally along the lower edge portion of the web,    wherein the pillar has upper and lower flanges arranged spaced along the pillar by the distance equal to the distance between the upper and lower flanges of the beam, and    wherein the splice plate is used to couple the lower flange of the beam to the lower flange of the pillar, and    the beam joining apparatus further comprising another splice plate for coupling the upper flange of the beam to the upper flange of the pillar, which another splice plate has reinforcing ribs arranged in vertical plane and resistant to the shearing force.    
   
   
       14 . A beam joining apparatus as set forth in  claim 1 , wherein bolts for mounting the anti-buckling member on the plastic region are arranged in such a manner as to contact the side surface of the plastic region deformed thereby to limit the deformation of the plastic region.  
   
   
       15 . A beam joining apparatus as set forth in  claim 1 , wherein an annular member is arranged between the splice plate and the anti-buckling member, and bolts for mounting the anti-buckling member on the plastic region are inserted through the annular member, so that when the plastic region is deformed, the side surface of the plastic region is adapted to come into contact with the outer surface of the annular member thereby to limit the deformation of the plastic region.  
   
   
       16 . A beam joining apparatus as set forth in  claim 1 , wherein the anti-buckling member includes a splice plate transverse deformation prevention means for preventing the transverse buckling deformation of the splice plate.