Composite concrete column and construction method using the same

Abstract

A composite concrete column comprising: upper and lower concrete column portions extending in the lengthwise direction and having an exposed portion between the upper and lower concrete column portions; and an H-beam connected between the upper and lower concrete column portions to be exposed at the exposed portion; and wherein the H-beam has a plurality of holes through which reinforcement bars for slab pass.

1 . A composite concrete column comprising:
 upper and lower concrete column portions extending in the lengthwise direction and having an exposed portion between the upper and lower concrete column portions; and   an H-beam connected between the upper and lower concrete column portions to be exposed at the exposed portion; and   wherein the H-beam has a plurality of holes through which reinforcement bars for slab pass.   
     
     
         2 . The composite concrete column according to  claim 1 , wherein the holes of the H-beam consist of first holes formed on flanges extending in parallel in the H-beam, and second holes formed on a web between the flanges,
 and wherein the first holes are formed at a height different from that of the second holes.   
     
     
         3 . The composite concrete column according to  claim 2 , wherein a first H-beam formed at the lower portion of an upper first composite concrete column is welded to a second H-beam formed at the upper portion of an lower second composite concrete column to one piece of integral composite concrete column. 
     
     
         4 . The composite concrete column according to  claim 2 , further comprising brackets attached to the side surface of the H-beam at the exposed portion. 
     
     
         5 . The composite concrete column according to  claim 4 , wherein the bracket comprises:
 a flat portion attached to the flanges or the web of the H-beam, the flat portion having holes corresponding to the holes of the H-beam; and   a protrusion portion protruding from the flat portion at the center thereof, the protrusion portion having fastening holes for connecting a crossbeam.   
     
     
         6 . The composite concrete column according to  claim 4 , further comprising a pair of horizontal brackets installed between the flanges of the H-beam, and a protrusion bracket protruding between the horizontal brackets. 
     
     
         7 . The composite concrete column according to  claim 4 , further comprising a T-shaped bracket having a vertical member welded to the web of the H-beam and a flat member welded to the flanges of the H-beam, and a rectangular bracket fixed to the bottom surface of the flat member of the T-shaped bracket. 
     
     
         8 . The composite concrete column according to  claim 1 , wherein the holes of the H-beam consist of first holes formed on the upper and lower portions of flanges extending in parallel in the H-beam, and second holes formed on the upper and lower portions of a web between the flanges,
 and wherein the first holes are formed at a height different from that of the second holes.   
     
     
         9 . A construction method comprising the following steps of:
 installing composite concrete columns including upper and lower concrete column portions extending in the lengthwise direction and having an exposed portion between the upper and lower concrete column portions, and an H-beam connected between the upper and lower concrete column portions to be exposed at the exposed portion and having a plurality of holes;   connecting ends of crossbeams to the H-beam at the exposed portion of the composite concrete columns;   installing reinforcement bars for slab to pass through the holes of the H-beam along the crossbeam;   installing molds on the composite concrete columns and the crossbeams; and   putting concrete on the molds and curing the same.   
     
     
         10 . The construction method according to  claim 9 , further comprising the steps of:
 attaching a plurality of brackets to the side surface of the H-beam at the exposed portion; and   connecting the end of H-beam to the brackets.   
     
     
         11 . A construction method comprising the following steps of:
 installing composite concrete columns including upper and lower concrete column portions extending in the lengthwise direction and having an exposed portion between the upper and lower concrete column portions, and an H-beam connected between the upper and lower concrete column portions to be exposed at the exposed portion and having first holes formed on the upper and lower portions of flanges and second holes formed on the upper and lower portions of a web;   connecting ends of crossbeams to the H-beam at the exposed portion of the composite concrete columns;   installing reinforcement bars for slab to pass through at least one of the first holes and the second holes of the H-beam along the crossbeam;   installing reinforcement bars for slab so that the ends of the reinforcement bars pass through at least one of the first holes and the second holes of the H-beam along the crossbeam to be fixed thereto;   installing molds on the composite concrete columns and the crossbeams; and   putting concrete on the molds and curing the same.   
     
     
         12 . The construction method according to  claim 11 , further comprising the steps of:
 fixing the ends of upper reinforcement bars and lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam to pass through the first holes formed on the upper and lower portions of the flanges respectively by a predetermined length, to be then fixed to the flanges;   installing upper reinforcement bars of the composite concrete crossbeam connected to the web of the H-beam to pass through the second holes formed on the upper portion of the web to extend lengthwise;   fixing the ends of lower reinforcement bars of one composite concrete crossbeam connected to the web to pass through the second holes formed on the lower portion of the web by a predetermined length to be then fixed to the web; and   bending the end of lower reinforcement bars of the other composite concrete crossbeam connected to the web not to interfere with the web.   
     
     
         13 . The construction method according to  claim 12 , wherein the ends of the upper reinforcement bars and the lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam are fixed to the flanges by welding or fixing members,
 and wherein the ends of the lower reinforcement bars of the one composite concrete crossbeam connected to the web are fixed to the web by welding or fixing members.   
     
     
         14 . The construction method according to  claim 11 , further comprising the steps of:
 fixing the ends of upper reinforcement bars and lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam to pass through the first holes formed on the upper and lower portions of the flanges respectively by a predetermined length, to be then fixed to the flanges;   installing upper reinforcement bars of the composite concrete crossbeam connected to the web of the H-beam to pass through the second holes formed on the upper portion of the web to extend lengthwise; and   bending the end of lower reinforcement bars of the composite concrete crossbeam connected to the web not to interfere with the web.   
     
     
         15 . The construction method according to  claim 14 , wherein the ends of the upper reinforcement bars and the lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam are fixed to the flanges by welding or fixing members. 
     
     
         16 . The construction method according to  claim 11 , further comprising the steps of:
 Installing upper reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam to pass through the first holes formed on the upper portion of the flanges;   fixing the ends of lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam to pass through the first holes formed on the lower portion of the flanges by a predetermined length, to be then fixed to the flanges;   installing upper reinforcement bars of the composite concrete crossbeam connected to the web of the H-beam to pass through the second holes formed on the upper portion of the web to extend lengthwise;   fixing the ends of lower reinforcement bars of one composite concrete crossbeam connected to the web to pass through the second holes formed on the lower portion of the web by a predetermined length to be then fixed to the web; and   bending the end of lower reinforcement bars of the other composite concrete crossbeam connected to the web not to interfere with the web.   
     
     
         17 . The construction method according to  claim 16 , wherein the ends of the lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam are fixed to the flanges by welding or fixing members,
 and wherein the ends of the lower reinforcement bars of the one composite concrete crossbeam connected to the web are fixed to the web by welding or fixing members.   
     
     
         18 . The construction method according to  claim 11 , further comprising the steps of:
 installing upper reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam to pass through the first holes formed on the upper portion of the flanges;   fixing the ends of lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam to pass through the first holes formed on the lower portion of the flanges by a predetermined length, to be then fixed to the flanges;   installing upper reinforcement bars of the composite concrete crossbeam connected to the web of the H-beam to pass through the second holes formed on the upper portion of the web to extend lengthwise;   bending the ends of lower reinforcement bars of one composite concrete crossbeam connected to the web not to interfere with the web.   
     
     
         19 . The construction method according to  claim 18 , wherein the ends of the lower reinforcement bars of the composite concrete crossbeams connected to the flanges of the H-beam are fixed to the flanges by welding or fixing members.