JP2005146582A - Connection structure between reinforced column and steel frame beam, and method of manufacturing anchoring fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure between a reinforced column and a steel frame beam, which ensures the mechanical strength and dimensional accuracy, and contributes to shortening of a construction period and reduction of construction costs, and to provide a method of manufacturing anchoring fittings for use in the connection structure. <P>SOLUTION: According to the connection structure between the reinforced column and the steel frame beam, the anchoring fittings are embedded in the reinforced column at beam connection locations, and allow an end of the steel frame beam to be connected thereto. Each anchoring fitting is integrally molded of a rod portion and female screw portions, and made of the same material. The rod portion is formed like a deformed bar or a threaded bar, and the female screw portions are formed at both ends of the rod portion in a manner radially expanded from the same. Further a corner angle between the rod portion and each female screw portion is gently formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a joining structure of a reinforced concrete column and a steel beam in which a fixing metal is embedded in a beam joint portion of a reinforced concrete column, and an end of a steel beam is joined by the fixing metal, and manufacture of a fixing metal used for the joining structure. Regarding the method.

  Conventionally, a composite structure composed of a reinforced concrete column resistant to compressive force and a steel beam resistant to bending is well known. The present applicant also discloses a composite structure including a joint structure of a reinforced concrete column and a steel beam in Patent Document 1. This will be described with reference to FIGS. FIG. 8 is a longitudinal sectional view of a composite structure composed of a reinforced concrete column 1 and a framework of a steel beam 2 joined to the reinforced concrete column 1. FIG. 9A is a schematic view of a conventional joint between the reinforced concrete column 1 and the steel beam 2 in the circle A shown in FIG. 8, and FIG. 9B is a horizontal sectional view of the reinforced concrete column 1. FIG. 10A is a schematic diagram of a joint between a reinforced concrete column 1, a split tee 3 or a high split tee 3 attached to the side surface thereof, and a steel beam 2 attached between the reinforced concrete columns 1. FIG. 11 is a side view of the fixing hardware 18 in FIG.

  9A and 9B, a split tee 3 or a high split tee 3 is attached to the side of the reinforced concrete column 1 in advance by a high tension bolt 4 to a fixing hardware 18 penetrating through the reinforced concrete column 1, and a steel beam 2 is attached between the reinforced concrete columns 1 by high tension bolts 5.

  10A and 10B, the fixing hardware 18 is embedded inside the reinforced concrete column 1 so as to penetrate the reinforced concrete column 1. The fixing hardware 18 is embedded in accordance with the position of the mounting hole formed in the flange of the split tee 3 or the high split tee 3 that is attached to a predetermined position on the side surface of the reinforced concrete column 1. The fixing metal 18 is formed by casting a female threaded metal 16 made of cast metal to both ends of the threaded reinforcing bar 17 or the deformed reinforcing bar 17 by an amorphous joint 19 or a frictional joint 19.

  Note that the fixing metal 18 at the joint between the reinforced concrete column 1 and the steel beam 2 in the circle B shown in FIG. 8 is formed by friction welding 19 or an amorphous female screw 16 at one end of the deformed reinforcing bar 17 or the threaded reinforcing bar 17. It joins by the joining 19, and the screw fixing board is joined to the other end part by the screwing means.

  According to Patent Document 1 by the present applicant, fixing in the joint portion by the screw reinforcing bar 17 or the deformed reinforcing bar 17 is restrained by the screw reinforcing bar 17 or the deformed reinforcing bar 17, so that fixing performance can be increased. Further, the joint between the reinforced concrete column 1 and the steel beam 2 is performed by the split tee 3 in which a fixing metal 18 in which a female screw metal is bonded to the screw rebar 17 or the deformed reinforcing bar 17 and is bonded to the fixing metal 18 is used. Different reinforced concrete columns 1 and steel beams 2 can be joined.

  On the other hand, in Patent Document 2, as a metal fitting for joining steel frames, a bolt hole is drilled in a flat surface of a horizontally long boss whose one end is vertically flat, and the flat part of the boss is brought into contact with the first steel frame. There is a description that a bolt is fastened, a flat plate portion is formed in the lateral direction of the other end of the boss, and a bolt is fastened by contacting a flange of a second steel frame to which the flat plate portion is to be joined. Further, Patent Document 2 includes a description of die-forging or casting of a boss portion and a flat plate portion integrally. According to this patent document 2, since the bolt is arranged on the beam flange line, there is no lever action with respect to the pulling force, and the joint efficiency of the bolt becomes 100%. It is said that it is simplified, the processing cost is reduced, and the quality is easy to ensure.

JP 2001-303666 A (Claim 1, Claim 2, Claim 4, Claim 5, Paragraph 0032) JP-A-9-195394 (Claim 1, Claim 2, Paragraph 0022)

  The fixing hardware described in Patent Document 1 is frictionally bonded or amorphously bonded to the deformed reinforcing bar or the screw reinforcing bar and the female threaded metal. However, it is necessary to further improve the mechanical strength of the bonded portion, and to check the dimensional accuracy. There is a need to reduce time and cost. Furthermore, when the other end of the screw rebar is a screw-type fixing plate, it is necessary to reduce the time and cost of screwing, grout injection, curing, and the like.

  On the other hand, as described in Patent Document 2, in a joint structure in which the ends of the steel beam are joined with a fixing metal embedded in a reinforced concrete column, even if it is simply integrated by die forging or casting, depending on the shape of the fixing metal Strength may be insufficient, and anchorage to reinforced concrete columns may be insufficient.

  An object of the present invention is to obtain a joint structure between a reinforced concrete column and a steel beam that can ensure mechanical strength and dimensional accuracy and reduce time and cost, and a method for manufacturing a fixing hardware used for the joint structure.

  The inventors of the present invention provide a fixing metal body in which a bar portion having a deformed reinforcing bar shape or a threaded reinforcing bar shape and female screw portions expanded from the bar portions at both ends thereof are integrally formed of the same material, or a bar portion and one end thereof. If the female screw part expanded from the rod part and the fixing plate part enlarged from the rod part at the other end are made into a fixing hardware integrally formed of the same material, and the stress is not easily concentrated, the above The inventor has obtained knowledge that the problem can be solved and has arrived at the present invention.

  That is, the present invention is a bonded structure of a reinforced concrete column and a steel beam in which a fixing metal is embedded in a beam joint of a reinforced concrete column, and an end of the steel beam is bonded by the fixing metal, and the fixing metal is The deformed reinforcing bar-shaped or threaded reinforcing bar-shaped rod part and the female thread part expanded from the rod part at both ends thereof are integrally formed of the same material, and the corners of the rod part and the female thread part are gently formed. It is characterized by being. Here, the deformed reinforcing bar shape or the threaded reinforcing bar shape means the same shape as the deformed reinforcing bar or the screw reinforcing bar, or a similar shape thereof, and integrally molded with the same material means that the diameter is expanded from the rod portion and the rod portions at both ends thereof. This means that the female thread part is integrally molded with the same material. Further, the gentle corner angle means that a substantially curved surface of R 0.2 mm or more, preferably R 1 mm or more is given to the corner angle. By setting it as the said structure, it becomes a joining structure of the reinforced concrete pillar and steel beam which can ensure mechanical strength and dimensional accuracy, and can reduce time and expense.

  Further, the present invention is a joining structure of a reinforced concrete column and a steel beam in which a fixing metal is embedded in a beam joint part of a reinforced concrete column, and an end of the steel beam is joined by the fixing metal, and the fixing metal is deformed The reinforcing bar-shaped or threaded reinforcing bar-shaped rod part, the female screw part whose diameter is enlarged from the stick part at one end thereof, and the fixing plate part whose diameter is enlarged from the stick part at the other end are integrally formed of the same material, and The corners of the rod portion and the female screw portion and between the rod portion and the fixing plate portion are gently formed. Molding integrally with the same material means that the rod part and the female screw part expanded from the rod part at one end and the fixing plate part enlarged from the rod part at the other end are integrally molded from the same material / material. Say that. By setting it as the said structure, it becomes a joining structure of the reinforced concrete pillar and steel beam which can shorten a work period while ensuring mechanical strength and dimensional accuracy. Note that the fixing plate portion applies a bearing pressure from the steel beam to the reinforced concrete column.

  In the present invention, it is preferable that the fixing metal has a parallel surface with the axis of the rod portion on the side surface of the rod portion. Here, the entire parallel surface may not be parallel. With the above-described configuration, the fixing metal is horizontally arranged in the mold and the concrete is cast, and the steel beam ends can be joined with the fixing metal with high accuracy. When the outer diameter of the female thread portion can be increased, a parallel surface with the shaft center of the rod portion can be formed on the side surface of the outer diameter of the female thread portion.

  In the present invention, it is preferable that the fixing hardware is provided with a length adjusting fitting connected thereto. Concrete is cast into a formwork in which rebars and fixing hardware are placed to form reinforced concrete columns. By adopting the above configuration, even if there is a variation in the width of the formwork, for example, 2 to 5 mm, the fixing hardware is used. It can be made to correspond by the length adjustment metal fitting connected to.

  In the present invention, it is preferable that the fixing hardware includes a positioning metal fitting with the steel beam embedded in the reinforced concrete column together with the fixing hardware. By setting it as the said structure, a some fixed metal fitting is accurately arrange | positioned in a formwork, concrete is laid, and a some fixed metal fitting is embed | buried in a reinforced concrete pillar. Since the plurality of fixing hardware are embedded with high accuracy, the split tee and the high split tee are positioned with high accuracy, and can be easily joined with no deviation from the end of the steel beam.

  In the present invention, it is preferable that the fixing hardware is integrally formed from deformed reinforcing bars or screw reinforcing bars. Since the deformed reinforcing bar or the threaded reinforcing bar has large unevenness that exhibits the fixing strength with the reinforced concrete, the unevenness can be used as a rod part as it is.

  In the present invention, the fixing hardware is preferably made of forged steel, cast steel, or spheroidal graphite cast iron. Forged steel, cast steel, or spheroidal graphite cast iron may be used as long as the shape and strength of the fixing hardware are ensured.

  Next, the present invention is a method for manufacturing a fixing hardware, the step of forming a deformed reinforcing bar or a threaded reinforcing bar to a predetermined length, and forging processing at both ends of the bar of the deformed reinforcing bar or the threaded reinforcing bar to form a flange portion. The method includes a step, a step of forming a female screw on an end face of the flange portion, and a step of gently connecting the rod portion and the female screw portion. By adopting the above-described configuration, it is possible to obtain a fixing hardware capable of ensuring mechanical strength and dimensional accuracy and reducing time and cost.

  Further, the present invention is a method for manufacturing a fixing hardware, a step of forming a deformed reinforcing bar or a threaded reinforcing bar to a predetermined length, a step of forging the end of the bar of the deformed reinforcing bar or the threaded reinforcing bar to form a flange part, Forming a female screw on an end face of the flange, forming a fixing plate by forging the other end of the deformed reinforcing bar or the screw reinforcing rod, the rod and the female screw, and the rod and the fixing plate. And a step of gently connecting the parts to each other. By adopting the above-described configuration, it is possible to obtain a fixing hardware capable of ensuring mechanical strength and dimensional accuracy and reducing time and cost.

  According to the joining structure of a reinforced concrete column and a steel beam and the method for manufacturing a fixing hardware according to the present invention, it is possible to secure mechanical strength and dimensional accuracy and reduce time and cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1A shows a reinforced concrete column 1 used as a middle column and a split tee 3 or a high split tee 3 attached to a side surface thereof and a steel beam 2 attached between the reinforced concrete columns 1 of Example 1 of the present invention. It is a schematic diagram which shows a junction part. FIG. 1B is a side view in which an intermediate portion of the fixing hardware 8 shown in FIG.

  In FIG. 1 (a), the fixing hardware 8 includes a split tee 3 or a high split tee 3 that penetrates the reinforced concrete column 1 inside the reinforced concrete column 1 and is attached to a predetermined position on the side of the reinforced concrete column 1. It is embedded according to the position of the mounting hole drilled in the flange. Then, the female thread portions 6 and 6 of the fixing hardware 8 are slightly exposed from the side surface of the reinforced concrete column 1, and the split tee 3 or the high split tee 3 is joined to the female thread portions 6 and 6 by the high tension bolt 4, and the reinforced concrete column. 1 are installed at predetermined intervals.

  Next, a steel beam 2 is attached between the reinforced concrete columns 1. The steel beam 2 is joined to the split tee 3 or the high split tee 3 attached to the reinforced concrete column 1 with a high tension bolt 5. A steel beam 2 is attached to a reinforced concrete column 1 that is a column.

  1 (b), the fixing metal member 8 is integrally formed of the same material with the rod portion 7 of the screw rebar and the female screw portions 6 and 6 formed with the female screws 6a and 6a having diameters expanded from the rod portions 7 at both ends thereof. And mechanical strength is ensured. Further, both corner angles 6d and 6d connecting the rod portion 7 and the female screw portions 6 and 6 are gently formed to be R1 mm, and it is difficult to concentrate stress on the corner angles 6d and 6d, thereby further ensuring mechanical strength. ing.

  Next, a method for manufacturing the fixing hardware 8 of Example 1 will be described with reference to FIG. In FIG. 2, first, (a) a material 7 b made of screw rebar is cut into a predetermined length by a cutting grindstone 21. Next, (b) one end of the material 7b is heated to a predetermined temperature, and then placed on the lower die 22 of the forging machine, hot forging processing is performed to lower and press the upper die 23, and the flange portion 6b is formed. To do. Here, the corners of 22a of the lower die 22 and 23a of the upper die 23 are set to R1 mm, and after hot forging, the corner 6a between the rod portion 7 and the female thread portion 6 expanded from the rod portion is connected at R1 mm. I am doing so. Similarly, the other is subjected to hot forging to form the other flange 6b. Next, (c) unnecessary burrs and the like are removed to obtain a material before the female thread processing. Further, the end face 6c is processed as necessary. Next, in (d), female thread processing is performed on the flanges 6b and 6b to form female thread portions 6 and 6, respectively. Through the above-described steps, the fixing hardware 8 is obtained which is used for the joining structure of the reinforced concrete column 1 and the steel beam 2 and uses the threaded joint reinforcing bar as a raw material, and can secure mechanical strength and dimensional accuracy and can reduce time and cost. .

  FIG. 3 (a) shows a reinforced concrete column 1 used as a middle column and a steel beam 2 attached between a split tee 3 or a high split tee 3 and a reinforced concrete column 1 attached to the side surface of Example 2 of the present invention. It is a schematic diagram which shows a junction part. FIG. 3B is a plan view showing a part of the fixing hardware 8 from the direction of arrow A in FIG. 3A and 3B, the same functions as those in FIGS. 1A and 1B described above are denoted by the same reference numerals.

  In FIG. 3 (b), the fixing hardware 8 is formed by integrally forming the deformed reinforcing bar portion 7 and the female screw portions 6 and 6 expanded from the rod portions 7 at both ends thereof with the same material so that the mechanical strength is increased. It is secured. Further, the corner 6d between the rod portion 7 and the female screw portions 6 and 6 is gently formed with R1 mm, so that stress is hardly concentrated on the corner 6d. Further, a parallel surface 8 a with the axis of the rod portion 7 is formed on the side surface of the rod portion 7. Accordingly, when the fixing hardware 8 is horizontally placed on the mold and the concrete is placed, and the ends of the steel beam 2 are joined with the fixing hardware 8 via the split tee 3 or the high split tee 3, the level accuracy can be improved. Can be joined with good. The fixing hardware 8 of the second embodiment can be manufactured by manufacturing the parallel surface 8a after manufacturing the same as in the first embodiment.

  FIG. 4A shows a reinforced concrete column 1 used as an outer column and a split tee 3 attached to the side surface thereof, or a high split tee 3 and a steel beam 2 attached to the reinforced concrete column 1 of Example 3 of the present invention. It is a schematic diagram which shows a junction part. FIG. 4B is a side view in which an intermediate portion of the fixing hardware 10 in FIG. 4A is omitted. 4A and 4B, the same functions as those in FIGS. 1A and 1B described above are denoted by the same reference numerals.

  In FIG. 4A, the fixing hardware 10 is a flange of a split tee 3 or a high split tee 3 that is attached to a predetermined position on the side of the reinforced concrete column 1 inside the reinforced concrete column 1 together with the fixing plate portion 11 at the left end in the figure. It is buried in accordance with the position of the mounting hole drilled in.

  Then, the female screw portion 6 at the right end in the figure of the fixing hardware 8 is slightly exposed from the side surface of the reinforced concrete column 1, and the split tee 3 or the high split tee 3 is joined to the female screw portion 6 by the high tension bolt 4. 1 is installed.

  Next, the steel beam 2 is attached to the reinforced concrete column 1. The steel beam 2 is joined to the split tee 3 previously attached to the reinforced concrete column 1 or the high split tee 3 with a high tension bolt 5, so that A steel beam 2 is attached to a certain reinforced concrete 1.

  In the fixing hardware 10 shown in FIG. 4B, the threaded reinforcing bar portion 7, the female screw portion 6 whose diameter is enlarged from the rod portion 7 at one end thereof, and the fixing plate portion 11 whose diameter is enlarged from the rod portion 7 at the other end are the same. It is molded integrally with the material to ensure mechanical strength. Further, the corner angle 6d where the rod portion 7 and the female screw portion 6 are connected and the corner angle 11d where the rod portion 6 and the fixing plate portion 11 are connected are gently formed into R1 mm, and stress is concentrated on the corner angles 6d and 11d. It is difficult to secure mechanical strength. The fixing hardware 8 of Example 3 can also be manufactured in the same manner as in Example 1.

  FIG. 5A shows a reinforced concrete column 1 used as a middle column and a steel beam 2 attached between a split tee 3 or a high split tee 3 attached to the side surface of the reinforced concrete column 1 and a reinforced concrete column 1 according to the fourth embodiment of the present invention. It is a schematic diagram which shows a junction part. FIG. 5B is a side view in which an intermediate portion of the fixing hardware 8 in FIG. 5A is omitted. 5A and 5B, the same functions as those in FIGS. 1A and 1B described above are denoted by the same reference numerals.

  5 (a) and 5 (b), the fixing hardware 8 is composed of a screw rebar rod portion 7, a female screw portion 6 whose diameter is expanded from the rod portion 7 at the left end, and a male screw portion 12 at the other end made of the same material. Molded to ensure mechanical strength. Further, the corner angle 6d where the rod portion 7 and the female screw portion 6 are connected and the corner angle 12d where the rod portion 6 and the male screw portion 12 are connected are gently formed into R1 mm, so that stress is hardly concentrated on the corner angles 6d and 12d. Yes.

  A female screw 15 formed at one end of the length adjusting metal fitting 14 is screwed into the male screw portion 12 of the fixing hardware 8, and is fixed and connected by a nut 13. The length adjusting bracket 14 is provided with a female screw 15 to which the high tension bolt 4 is screwed at the other end. Thereby, even if the width 1b of the formwork (not shown) varies, for example, 2 to 5 mm, it can be dealt with by the length adjusting fitting 14 connected to the fixing hardware 8. That is, the screwing depth between the male threaded portion 12 of the fixing hardware 8 and the length adjusting bracket 14 may be adjusted in accordance with the width 1b of the mold and fixed with the nut 13. The fixing hardware 8 of Example 4 can also be manufactured in the same manner as in Example 1.

  FIG. 6A shows a reinforced concrete column 1 used as an outer column and a split tee 3 attached to the side surface thereof, or a high split tee 3 and a steel beam 2 attached to the reinforced concrete column 1 of Example 5 of the present invention. It is a schematic diagram which shows a junction part. FIG. 6B is a side view in which an intermediate portion of the fixing hardware 8 of FIG. 6A is omitted. 6A and 6B, the same functions as those in FIGS. 1A and 1B described above are denoted by the same reference numerals.

  In FIG. 6A, the fixing hardware 8 is a flange of a split tee 3 or a high split tee 3 attached to a predetermined position on the side of the reinforced concrete column 1 inside the reinforced concrete column 1 together with the fixing plate portion 19 at the left end in the figure. It is buried in accordance with the position of the mounting hole drilled in. In the fixing metal 8 shown in FIG. 6B, the fixing metal 8 shown in FIGS. 5A and 5B in Example 4 described above is diverted, and a separate fixing is performed on the male screw portion 12 of the fixing metal 8. The female screw 19b of the plate part 19 is screwed and assembled. The fixing hardware 8 makes parts common and facilitates the management of the parts. Note that the fixing hardware 8 of Example 5 also has sufficient mechanical strength, and can be manufactured in the same manner as in Example 1.

  FIG. 7 shows a joint structure between a reinforced concrete column 1 and a steel beam 2 provided with a positioning bracket 17 for the steel beam 2 in addition to the fixing hardware 8 according to the sixth embodiment of the present invention. Schematic view, (b) is a partially enlarged view of the joint of (a), and (c) is a side view of the positioning fitting 17. 7A and 7B, the same functions as those in FIGS. 1A and 1B described above are denoted by the same reference numerals.

  7A, 7 </ b> B, and 7 </ b> C, the fixing hardware 8 includes a positioning bracket 17 with the steel beam 2 that is embedded in the reinforced concrete 1 pillar together with the fixing hardware 8. The positioning fitting 17 is formed with positioning holes 17a that are aligned with the mounting holes formed in the upper and lower split tees 3 or the high split tee 3.

  The joint structure of the reinforced concrete column 1 and the steel beam 2 is formed as follows. First, the plurality of fixing hardware 8 and the positioning bracket 17 are temporarily tightened with the high tension bolt 4 and embedded in a mold (not shown) so that the positioning hole 17a of the positioning bracket 17 is slightly visible. Next, concrete is placed in the formwork, and the temporarily tightened high tension bolt 4 is removed to form a reinforced concrete column 1. Next, the split tee 3 or the high split tee 3 is joined to the fixing hardware 8 integrated with the reinforced concrete column 1 by the high tension bolt 4 through the positioning hole 17a. Next, the steel beam 2 is joined to the split tee 3 or the high split tee 3 with a high tension bolt 5.

  According to the sixth embodiment, the plurality of fixing hardware 8 is accurately placed in the mold and the concrete is placed, and the plurality of fixing hardware 8 is embedded in the reinforced concrete column 1. Since the plurality of fixing hardware 8 is embedded with high accuracy, the split tee 3 and the high split tee 3 can be positioned with high accuracy, and can be easily joined to the end of the steel beam 2 without displacement.

  As mentioned above, although Examples 1-6 demonstrated based on the fixing metal integrally formed by the deformed reinforcing bar or the screw reinforcing bar, if the shape and intensity | strength as a fixing metal are ensured, forged steel or cast steel, or spherical graphite Cast iron may be used.

: (A) shows the junction part of the reinforced concrete pillar 1 used as a center pillar of Example 1, and the steel beam 2 attached between the split tee 3 attached to the side surface or the high split tee 3 and the reinforced concrete pillar 1 It is a schematic diagram, and (b) is a side view in which an intermediate portion of the fixing hardware 8 in (a) is omitted. FIG. 3 is a view showing a method for manufacturing the fixing metal 8 of Example 1. : (A) shows the junction part of the reinforced concrete pillar 1 used as a center pillar of Example 2, and the steel beam 2 attached between the split tee 3 attached to the side surface or the high split tee 3 and the reinforced concrete pillar 1 It is a schematic diagram, (b) is a plan view showing a part of the fixing hardware 8 from the arrow A of (a). : (A) shows the junction part of the reinforced concrete pillar 1 used as an outer pillar of Example 3, and the split tee 3 attached to the side surface, or the steel beam 2 attached to the high split tee 3 and the reinforced concrete pillar 1 It is a schematic diagram, and (b) is a side view in which an intermediate portion of the fixing hardware 8 in (a) is omitted. : (A) shows the junction part of the reinforced concrete pillar 1 used as a center pillar of Example 4, and the steel beam 2 attached between the split tee 3 or high split tee 3 attached to the side surface, and the reinforced concrete pillar 1 It is a schematic diagram, and (b) is a side view in which an intermediate portion of the fixing hardware 8 in (a) is omitted. : (A) shows the junction part of the reinforced concrete pillar 1 used as an outer pillar of Example 6, and the split tee 3 attached to the side surface, or the high split tee 3 and the steel beam 2 attached to the reinforced concrete pillar 1 It is a schematic diagram, and (b) is a side view in which an intermediate portion of the fixing hardware 8 in (a) is omitted. : In addition to the fixing hardware 8 of Example 6, the joining structure of the reinforced concrete column 1 and the steel beam 2 provided with the positioning bracket 17 with the steel beam 2 is shown, (a) is a schematic diagram of the joint, (b) (A) is the elements on larger scale of the junction part, (c) is a side view of the positioning metal fitting 17. FIG. : It is a longitudinal cross-sectional view of the composite structure which consists of the frame | frame of the reinforced concrete pillar 1 and the steel beam 2 joined to this reinforced concrete pillar 1. FIG. : (A) is a schematic diagram of the conventional junction part of the reinforced concrete pillar 1 and the steel beam 2 in the circle A shown in FIG. 8, (b) is a horizontal sectional view of the reinforced concrete pillar 1. : (A) is a schematic diagram of the junction part of the reinforced concrete pillar 1, the split tee 3 attached to the side surface or the high split tee 3, and the steel beam 2 attached between the reinforced concrete pillars 1, (b) It is a side view of the fixing metal object 18 in a).

Explanation of symbols

1: Reinforced concrete pillar 1b: Width of formwork 2: Steel beam 3: Split tee or high split tee 4, 5: High tension bolt 6: Female thread 6b: Gutter 6d, 11d, 12d: Corner 7: Bar 7b : Material (screw rebar or deformed rebar)
8, 18: Fixing hardware 8a: Parallel surfaces 11, 19: Fixing plate portion 12: Male screw portion 14: Length adjusting bracket 15: Male screw 16: Female screw hardware 17: Positioning bracket 17a: Positioning hole 19a: Female screw

Claims (9)

A fixing metal is embedded in a beam joint of a reinforced concrete column, and an end of the steel beam is joined by the fixing metal, and the fixing metal is a deformed reinforcing bar shape or a screw reinforcing bar. The shaped rod portion and the female screw portion expanded from the rod portion at both ends thereof are integrally formed of the same material, and the corner angle between the rod portion and the female screw portion is gently formed. The joint structure of reinforced concrete columns and steel beams. A fixing metal is embedded in a beam joint of a reinforced concrete column, and an end of the steel beam is joined by the fixing metal, and the fixing metal is a deformed reinforcing bar shape or a screw reinforcing bar. A rod portion having a shape, a female screw portion expanded from the rod portion at one end thereof, and a fixing plate portion expanded from the rod portion at the other end are integrally formed of the same material, and the rod portion and the female screw portion And a connecting structure of a reinforced concrete column and a steel beam, characterized in that the corners of the bar portion and the fixing plate portion are gently formed. The joint structure of a reinforced concrete column and a steel beam according to claim 1 or 2, wherein the fixing hardware has a side surface of the bar portion and a parallel surface with the axis of the rod portion. The joint structure of a reinforced concrete column and a steel beam according to any one of claims 1 to 3, wherein the fixing hardware is provided with a length adjusting metal fitting connected thereto. The joint of the reinforced concrete column and the steel beam according to any one of claims 1 to 4, wherein the fixing hardware includes a positioning fitting with the steel beam embedded in the reinforced concrete column together with the fixing hardware. Construction. The joint structure of a reinforced concrete column and a steel beam according to any one of claims 1 to 5, wherein the fixing hardware is integrally formed from deformed reinforcing bars or threaded reinforcing bars. The joint structure of a reinforced concrete column and a steel beam according to any one of claims 1 to 5, wherein the fixing hardware is made of forged steel, cast steel, or spheroidal graphite cast iron. A method of manufacturing a fixing metal, the step of forming a deformed bar or a screw rebar to a predetermined length, the step of forging at both ends of the bar part of the deformed bar or the screw rebar, and forming a flange part, the end face of the hook part A method of manufacturing a fixing hardware comprising the steps of: forming a female screw on the screw, and connecting the rod portion and the female screw portion gently. A method of manufacturing a fixing hardware, the step of forming a deformed reinforcing bar or a threaded reinforcing bar to a predetermined length, the step of forging the end of the bar of the deformed reinforcing bar or the threaded reinforcing bar to form a flange, Forming a female screw on the other end, forming a fixing plate portion by forging the other end of the deformed reinforcing bar or the rod portion of the threaded reinforcing bar, and gently moving the rod portion and the female screw portion, and the rod portion and the fixing plate portion. A method of manufacturing a fixing hardware, comprising the step of connecting.

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