Steel-concrete composite beam and construction method using same

Abstract

A steel-concrete composite beam includes a long rectangular steel frame; concrete members installed at only both ends of the steel frame, excluding a center portion thereof; a prestressable reinforcement buried in the concrete member; and a stirrup reinforcement arranged to the concrete member with a regular gap thereto to surround a lower flange of the steel frame.

1 . A steel-concrete composite beam, comprising:
 a long rectangular steel frame;   concrete members installed at only both ends of the steel frame, excluding a center portion thereof;   a prestressable reinforcement buried in the concrete member; and   a stirrup reinforcement arranged to the concrete member with a regular gap thereto to surround a lower flange of the steel frame.   
     
     
         2 . The steel-concrete composite beam according to  claim 1 ,
 wherein the concrete member is formed to bury a part of a lower end of the lower flange and a web of the steel frame so that an upper flange of the steel frame is located to be higher than an upper surface of the concrete member,   wherein the steel-concrete composite beam further comprises a support member formed to extend from the center portion of the steel frame, where the concrete member is not formed, in a lateral direction, and   wherein an upper surface of the support member has the same height as the upper surface of the concrete member.   
     
     
         3 . The steel-concrete composite beam according to  claim 2 , wherein the support member includes:
 a fixed side fixed to the web of the steel frame; and   an installing side extending in parallel with the upper flange in a lateral direction of the steel frame.   
     
     
         4 . The steel-concrete composite beam according to  claim 1 , wherein the concrete member is formed to bury even an upper flange of the steel frame so that an upper surface of the upper flange of the steel frame is located at the same height as an upper surface of the concrete member. 
     
     
         5 . The steel-concrete composite beam according to  claim 1 , wherein a front end of the steel frame is not buried in the concrete member but protrudes out, and a plurality of coupling holes is formed in the front end of the steel frame. 
     
     
         6 . The steel-concrete composite beam according to  claim 2 , wherein a front end of the steel frame is not buried in the concrete member but protrudes out, and a plurality of coupling holes is formed in the front end of the steel frame. 
     
     
         7 . The steel-concrete composite beam according to  claim 3 , wherein a front end of the steel frame is not buried in the concrete member but protrudes out, and a plurality of coupling holes is formed in the front end of the steel frame. 
     
     
         8 . (canceled) 
     
     
         9 . The steel-concrete composite beam according to  claim 4 , wherein a front end of the steel frame is not buried in the concrete member but protrudes out, and a plurality of coupling holes is formed in the front end of the steel frame. 
     
     
         10 . The steel-concrete composite beam according to  claim 1 , wherein a length of the center portion of the steel frame, where the concrete member is not formed, is greater than a sum of the lengths of the concrete members. 
     
     
         11 . The steel-concrete composite beam according to  claim 2 , wherein a length of the center portion of the steel frame, where the concrete member is not formed, is greater than a sum of the lengths of the concrete members. 
     
     
         12 . The steel-concrete composite beam according to  claim 3 , wherein a length of the center portion of the steel frame, where the concrete member is not formed, is greater than a sum of the lengths of the concrete members. 
     
     
         13 . The steel-concrete composite beam according to  claim 4 , wherein a length of the center portion of the steel frame, where the concrete member is not formed, is greater than a sum of the lengths of the concrete members. 
     
     
         14 . The steel-concrete composite beam according to  claim 1 , wherein a plurality of stud members is formed at a side of a web of the steel frame, which is buried in the concrete member. 
     
     
         15 . The steel-concrete composite beam according to  claim 2 , wherein a plurality of stud members is formed at a side of a web of the steel frame, which is buried in the concrete member. 
     
     
         16 . The steel-concrete composite beam according to  claim 3 , wherein a plurality of stud members is formed at a side of a web of the steel frame, which is buried in the concrete member. 
     
     
         17 . The steel-concrete composite beam according to  claim 4 , wherein a plurality of stud members is formed at a side of a web of the steel frame, which is buried in the concrete member. 
     
     
         18 . A method for constructing a building, comprising:
 installing a pillar member; and   connecting the steel-concrete composite beam according to  claim 1  to the pillar member.   
     
     
         19 . A method for constructing a building, comprising:
 installing a pillar member; and   connecting the steel-concrete composite beam according to  claim 2  to the pillar member.   
     
     
         20 . A method for constructing a building, comprising:
 installing a pillar member; and   connecting the steel-concrete composite beam according to  claim 3  to the pillar member.   
     
     
         21 . A method for constructing a building, comprising:
 installing a pillar member; and   connecting the steel-concrete composite beam according to  claim 4  to the pillar member.