Beam-column connection structure and method for forming the same

Abstract

The present invention relates to a beam-column connection structure and a method for connecting a beam and a column. The beam-column connection structure comprises a precast column, a precast steel reinforced concrete beam and a plurality of fasteners. The precast column has a plurality of tension bars horizontally arranged inside the precast column and has an engagement assembly. One side of the engagement assembly is connected with one end of each of the plurality of tension bars, and the other side of the engagement assembly has a plurality of second holes therein. One end of the precast steel reinforced concrete beam has a plurality of first holes corresponding to the plurality of second holes. The plurality of fasteners are inserted into the plurality of first holes and the plurality of second holes such that the precast steel reinforced concrete beam is fixed to the precast column.

1 . A beam-column connection structure, comprising:
 a precast column comprising a plurality of tension bars horizontally embedded in the precast column and comprising an engagement assembly, wherein one side of the engagement assembly is connected with a first end of the plurality of tension bars, and the other side of the engagement assembly has a plurality of second through holes;   a precast steel reinforced concrete beam having a plurality of first through holes at an end of the precast steel reinforced concrete beam, wherein the plurality of first through holes corresponds to the plurality of second through holes; and   a plurality of fasteners penetrating through the plurality of first and second through holes so that the precast steel reinforced concrete beam is fixed to the precast column.   
     
     
         2 . The beam-column connection structure according to  claim 1 , wherein the precast steel reinforced concrete beam comprises a steel beam therein, and a section of the steel beam is partially or completely enveloped by reinforced concrete and the end of the precast steel reinforced concrete beam is a bare steel beam section with a predetermined distance, the section being next to the bare steel beam section. 
     
     
         3 . The beam-column connection structure according to  claim 2 , where the steel beam is enveloped by reinforced concrete, on the left side, right side and bottom, but not on the top. 
     
     
         4 . The beam-column connection structure according to  claim 2 , wherein the steel beam of the precast steel reinforced concrete beam comprises:
 a top flange;   a bottom flange substantially parallel to the top flange; and   a web plate substantially perpendicularly connected to the top flange and the bottom flange with two ends thereof.   
     
     
         5 . The beam-column connection structure according to  claim 4 , wherein the plurality of first through holes are linearly disposed on the web plate of the steel beam along the edge of the end of the precast steel reinforced concrete beam, and a plurality of shear studs are provided on an upper surface of the top flange. 
     
     
         6 . The beam-column connection structure according to  claim 1 , wherein a surface of the other side of the engagement assembly is provided with a protrusion substantially perpendicularly extending from the surface, the protrusion having the plurality of second through holes therein. 
     
     
         7 . The beam-column connection structure according to  claim 6 , wherein the protrusion is elongated, the plurality of second through holes are substantially linearly arranged along the protrusion, and the plurality of fasteners are high-tension bolts. 
     
     
         8 . The beam-column connection structure according to  claim 7 , wherein the engagement member further comprises:
 a first engagement member, one side of the first engagement member connecting with the first end of a part of the plurality of tension bars at a first position, the other side of the first engagement member connecting with the engagement assembly; and   a second engagement member, one side of the second engagement member connecting with the first end of the rest part of the plurality of tension bars at a second position, the other side of the second engagement member connecting with the engagement assembly,   wherein the first position is higher than the second position.   
     
     
         9 . The beam-column connection structure according to  claim 1 , wherein the precast column comprises a main rebar assembly and a stirrup assembly fixedly coupled to the main rebar assembly, wherein the stirrup assembly comprises a main spiral stirrup and a plurality of auxiliary spiral stirrups, wherein the plurality of auxiliary spiral stirrups partially overlap the main spiral stirrup, and a major part of the auxiliary spiral stirrups are disposed outside the main spiral stirrup. 
     
     
         10 . The beam-column connection structure according to  claim 9 , wherein the main rebar assembly comprises:
 a set of inner main rebar, the main spiral stirrup surrounding and connecting to outer sides of the set of inner main rebar;   a set of middle main rebar disposed between the main spiral stirrup and the plurality of the auxiliary spiral stirrups; and   a set of outer main rebar disposed outside of the main spiral stirrup and inside of the plurality of the auxiliary spiral stirrups.   
     
     
         11 . A method for forming a beam-column connection, comprising:
 providing a precast column comprising a plurality of tension bars horizontally embedded in the precast column;   providing an engagement assembly;   connecting one side of the engagement assembly with a first end of the plurality of tension bars, wherein the other side of the engagement assembly has a plurality of second through holes;   providing a precast steel reinforced concrete beam, an end of the precast steel reinforced concrete beam having a plurality of first through holes corresponding to the plurality of second through holes; and   penetrating a plurality of fasteners through the plurality of first and second through holes so that the precast steel reinforced concrete beam is fixed to the precast column.   
     
     
         12 . The method according to  claim 11 , further comprising providing a first engagement member and a second engagement member; connecting inner sides of the first and second engagement members to the first end of the plurality of tension bars at a first position and a second position respectively; and connecting the outer sides of the first and second engagement members to the engagement assembly, wherein the first position is higher than the second position. 
     
     
         13 . The method according to  claim 12 , further comprising welding inner sides of the first and second engagement members to the first end of the plurality of tension bars at a first position and a second position respectively, and welding the outer sides of the first and second engagement members to the engagement assembly. 
     
     
         14 . The method according to  claim 13 , further comprising welding a bare steel beam section of the precast steel reinforced concrete beam to the engagement assembly. 
     
     
         15 . The method according to  claim 14 , wherein providing a precast steel reinforced concrete beam comprises providing a steel beam and enveloping a section of the steel beam with reinforced concrete wherein the steel beam comprises a top flange, a web plate and a bottom flange, wherein the top flange is substantially parallel to the bottom flange, and the web plate is substantially perpendicularly connected to the top flange and the bottom flange with two ends thereof. 
     
     
         16 . The method according to  claim 15 , further comprising providing a plurality of shear studs on an upper surface of the top flange, welding the top flange and the bottom flange to a surface of the engagement assembly, and welding the web plate to a protrusion substantially perpendicularly extending from the surface of the engagement assembly. 
     
     
         17 . A method for beam-column connection, comprising:
 providing a precast column comprising a plurality of first and second tension bars horizontally embedded in the precast column, wherein the plurality of second tension bars substantially perpendicularly intersect with the plurality of first tension bars, wherein providing the precast column comprises:   providing a first engagement assembly so that one side of the first engagement assembly connects with a first end of the plurality of first tension bars, and the other side of the first engagement assembly has a plurality of second through holes;   providing a second engagement assembly so that one side of the second engagement assembly connects with a first end of the plurality of second tension bars, and the other side of the second engagement assembly has a plurality of third through holes;   providing a first and a second precast steel reinforced concrete beam, wherein an end of each the first and second precast steel reinforced concrete beams has a plurality of first through holes corresponding to the plurality of second through holes and the plurality of third through holes; and   penetrating a plurality of fasteners through the plurality of first through holes and the plurality of second through holes and through the plurality of first through holes and the plurality of third through holes so that the first and second precast steel reinforced concrete beams are fixed to two adjacent sides of the precast column.   
     
     
         18 . The method according to  claim 17 , wherein providing a first and a second precast steel reinforced concrete beam comprises providing a steel beam therein, and partially or completely enveloping a section of the steel beam with reinforced concrete so that the end at each the first and second precast steel reinforced concrete beams is a bare steel beam section with a predetermined length, the section being next to the bare steel beam section. 
     
     
         19 . The method according to  claim 18 , further comprising surrounding the bare steel beam section with a plurality of first rebar, molding and grouting the left side, right side and bottom side of the bare steel beam section. 
     
     
         20 . The method according to  claim 19 , further comprising horizontally disposing a plate member surrounded by the precast column and the first and second precast steel reinforced concrete beams. 
     
     
         21 . The method according to  claim 20 , further comprising disposing a plurality of second rebar on the plate member, wherein the plurality of second rebar is in a staggered arrangement; and grouting concrete on the plate member and a part of an upper surface of the first and second precast steel reinforced concrete beams. 
     
     
         22 . The beam-column connection structure according to  claim 1 , wherein the side of the engagement assembly, which is connected with the first end of the plurality of tension bars, is opposite to the other side of the engagement assembly, which has a plurality of second through holes. 
     
     
         23 . The beam-column connection structure according to  claim 1 , further comprising another engagement assembly spaced apart from the engagement assembly and connected with a second end of the plurality of tension bars, wherein the second end of the plurality of tension bars is opposite to the first end of the plurality of tension bars.