JP6424075B2 - REINFORCED CONCRETE COLUMN STEEL BEAM JOINTING MEMBER, ITS MANUFACTURING METHOD, AND BUILDING CONSTRUCTION METHOD - Google Patents

Description

  The present invention relates to a reinforced concrete column steel beam joint member, a manufacturing method thereof, and a building construction method that achieve rationalization of the construction of a building in which reinforced concrete columns, steel beams, and brace materials are arranged, and that achieve a reduction in work period and cost.

  As a building having a composite structure composed of steel and concrete, a structural form in which column members are made of reinforced concrete and beam members are made of steel is adopted. In a building of this structure type, a brace member (hereinafter referred to as a brace) may be provided in order to reduce the burden on the column member and the beam member when the seismic force is applied. For example, in a brace design where the lower end of the brace is fixed to the column base and the upper end is fixed to the lower end of the beam, the extension line on the lower end side of the member axis is the intersection of the axis of the orthogonal column member and the axis of the beam member (See Patent Document 1). In this design, there is a problem in that a part of a member (for example, a support plate) that supports the lower end of the brace is arranged in the cross section of the reinforced concrete column, and the formwork and the brace interfere when the reinforced concrete column is constructed.

  Moreover, in the beam-column joint structure of Patent Document 1, a frame-shaped reinforcing steel plate (a cover plate) is provided so as to surround the beam-column joint (panel portion). In this column-beam joint, steel materials of various shapes such as cover plates and brace connecting members have to be arranged after the construction of the reinforced concrete columns, and the work processes such as concrete work and steel material installation work are complicated.

  In addition, there is a design that uses reinforced concrete columns as precast concrete columns in order to reduce work on site, but it is necessary to incorporate steel materials in advance when manufacturing precast concrete columns, so the procurement of steel materials at the prefab factory and the manufacturing process are complicated. There is a problem that it does not lead to shortening the construction period.

JP 7-331739 A

  As a method for solving the above-mentioned problem, it is possible to design a structure in which the extension line of the brace member axis is eccentric by a predetermined amount from the intersection of the column member axis and the beam member axis so that the brace does not interfere with the reinforced concrete column. . According to this method, the steel material constituting the reinforced concrete column and the brace does not interfere with each other, so that the problem that the work at the column beam joint becomes complicated can be solved. However, since a large eccentric moment acts on the beam-column joint, it must be designed as a structure that reinforces the steel material around the beam-column joint and ensures the leverage of the joint. For this reason, there exists a possibility that construction cost may increase rather than the case where a brace passes the intersection of the axis of a pillar member, and the axis of a beam member.

  Therefore, the object of the present invention is to solve the problems of the prior art described above, and to construct the reinforced concrete column while designing the extension line of the member axis of the brace to pass through the intersection of the axis of the column member and the axis of the beam member. In order to prevent a decrease in work efficiency due to the presence of brace plates, a reinforced concrete column steel beam joint member as a precast member, a method of manufacturing the same, and a building construction method using the column beam joint member It is to provide.

In order to achieve the above object, the reinforced concrete column steel beam joint member of the present invention is a reinforced concrete comprising a precast member in which braces are arranged so that the member axis passes through the intersection of the member axis of the column and the beam to be joined. A column steel beam connecting member , a closing plate surrounding a portion where the beam converges so as to form the outer shape of the column, and a column main bar through hole is disposed in a space surrounded by the closing plate, and is filled with concrete and a beam-column joints is being fabricated integrally with the pillar beam, and a end the pillars of the lower or concrete pillar destination hitting portion located partially within interferes range of the upper end of the brace, A reinforced concrete column is joined to the concrete column leading portion.

As a method of manufacturing a reinforced concrete column steel beam joint member, the present invention provides a method for producing a column at a portion where the steel beam where braces are arranged converges so that the member axis passes through the intersection of the member axis of the column and the beam to be joined. A side formwork having a height including a range in which an end of a brace attached to an upper surface or a lower surface of the steel beam and a lower end or a part of the upper end of the column interfere with each other is attached to form an outer shape of the steel beam. and attach in close contact with the upper end of the closing plate, the pillar main reinforcement through holes are arranged, and Da設concrete in a space surrounded by the closing plate and the side mold, and the beam-column joints It is characterized in that the concrete column tip is manufactured integrally.

  As a building construction method using reinforced concrete columns and steel beam joints, reinforced concrete columns with column main bars arranged at the top end through the beam-to-column joints are erected at predetermined intervals, and above the reinforced concrete columns. The beam-column connecting member according to claim 1 is installed on the end face, a steel beam is installed between the reinforced concrete columns to hold the frame, and the upper-level reinforced concrete column is erected on the column-beam connecting member. At the lower end of the reinforced concrete column, the lower column main bar and the upper floor column main bar that penetrate the column beam joint are connected by connecting means, and between the upper level steel beam and the lower level steel beam It is characterized in that a building is constructed by laying braces on the floor and sequentially stacking reinforced concrete columns and column beam joint members.

In the method the construction of the building, said reinforced concrete column is a precast concrete member, said mounted erected on a concrete pillar destination beating section on, joined to the beam-column joint member Luke, or the reinforced concrete pillars, in construction site concrete element, the mold on said concrete pillar destination beating unit, assembling a rebar, is constructed concreting, Rukoto joined to the beam-column joint member is preferred.

  According to the present invention, in the design in which the extension line of the member axis of the brace passes through the intersection of the member axis of the reinforced concrete column and the member axis of the steel beam, the brace is attached in advance when the reinforced concrete column or the precast concrete column is constructed. When building a building using a beam-column joint member with a plate positioned in the beam-beam joint, it is possible to increase the efficiency of the construction of reinforced concrete columns and the assembly work of steel beams. Play.

The perspective view which showed the whole structure of the reinforced concrete column steel beam joining member of one Embodiment of this invention. Explanatory drawing which showed the manufacture procedure of a reinforced concrete column steel beam joining member (display by a side view). Explanatory drawing which showed the manufacture procedure of a reinforced concrete column steel beam joining member (display by a top view). Explanatory drawing which showed the manufacture process of the reinforced concrete column leading part of the reinforced concrete column steel beam joining member. Procedure explanatory drawing which showed the construction procedure of the reinforced concrete column and steel beam composite structure building which incorporated the reinforced concrete column steel beam joint member (the 1). Procedure explanatory drawing which showed the construction procedure of the reinforced concrete column and steel beam composite structure building which incorporated the reinforced concrete column steel beam joint member (the 2).

  Hereinafter, the basic structure of the reinforced concrete column steel beam joint member of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a joint member 10 (column beam joint member) constituting a joint portion (column beam joint portion) which is a connection portion between a reinforced concrete column and a steel beam. 2 and 3 are explanatory views showing the manufacturing procedure of the joint member 10. In FIGS. 2 (a) and 3 (a), a steel beam as a steel member, a closing plate (to be described later) )) Can be confirmed.

  As shown in FIGS. 1 and 6, the joint member 10 of the present embodiment is a precast member having a composite structure of steel and concrete that connects the reinforced concrete columns 1 and 1 on the upper and lower floors and the steel beam 2 on each floor. It is. As shown in FIGS. 1, 2 (c), and 3 (c), the planar shape is equal to the cross section of the reinforced concrete column 1, and the outer peripheral surface has a height substantially equal to the beam height of the end steel beam 12. Surrounded by a steel plate closing plate 11, short end steel beams 12 extend from the outer sides of the four sides of the closing plate 11 so as to have a cross shape in plan view.

  When the joint member 10 is installed on a lower-floor pillar at the time of building construction, as shown in FIG. 6, each member of the pillar and beam joined to the joint portion is in the longitudinal direction of each steel beam 2. And the member axis in the height direction of the reinforced concrete column 1 are converged so that they coincide at the center position of the joint. And the extended line of the member axis line of a brace passes along the center position of this joint part. Thereby, the axial force of the brace is transmitted to the joint portion without being eccentric with respect to the joint portion, and it is possible to avoid occurrence of an eccentric moment in the joint portion.

  The structure of the reinforced concrete column leading part which comprises a part of the joint member 10 constructed in the upper surface of the joint part is demonstrated. The height of this reinforced concrete column heading portion (hereinafter simply referred to as the column heading portion) is equal to the height of the support plate 14 that fixes the lower end of the brace to the beam side as shown in FIGS. Equally, the planar shape is the same as the cross-sectional shape of the reinforced concrete column as shown in FIG. Further, column main bar insertion holes are formed in the vicinity of each corner portion of the joint member 10 so as to penetrate through the entire height of the joint member 10. In the present embodiment, three sheath tubes are arranged in parallel at each corner position, and these sheath tubes function as column main reinforcement insertion holes.

  As shown in FIG. 2A, the attachment plate 14 is welded and fixed to the upper surface of the upper flange 12 a of the end steel beam 12 so that a part in the length direction protrudes from the joint member 10. ing. Further, stiffening plates 15 are attached to both side surfaces of the attachment plate 14 at an angle equal to the inclination angle of the end brace 13. The stiffening plate 15 smoothly transmits the axial force of the brace to the joint member 10.

  Hereinafter, the manufacturing procedure of the joint member 10 will be described with reference to FIGS. The steel member which is the main component of the joint member 10 is manufactured in advance at a steel processing factory. As shown in FIGS. 2 (a) and 3 (a), the basic shape of the steel member of the present embodiment is a cross shape in plan view, and defines a space equal to the column outer circumference at the intersection of the beams. A closing plate 11 is attached so as to be formed. In a building, two to four steel beams 2 (FIG. 5) (end steel beam 12) converge at a joint portion to be joined to a column and a beam according to the joint location. Accordingly, the planar shape of the steel member is I-shaped, L-shaped, T-shaped, or cross-shaped. In the present embodiment, a steel member in which one end brace 13 is attached to the upper flange 12a of the end steel beam 12 via the accessory plate 14 is carried into a precast member production yard at a building construction site. .

  In the production yard, the sheath tube 16 through which the column main reinforcement 5 (FIG. 5A) passes is arranged in four spaces between the end steel beam 12 and the closing plate 11 of the carried steel member (see FIG. 5). 4). Further, as a concrete placement work for the joint member 10, the bottom portion of the portion surrounded by the closing plate 11 is closed with a bottom mold (not shown), for the column tip portion 10 </ b> B formed on the upper side of the steel member. A side mold 17 is attached. The side mold 17 is a substantially square frame in plan view as shown in FIG. 4, and is attached in close contact with the upper surface of the steel member. As the formwork, conventional wooden formwork, steel formwork, etc. can be used, but each part has almost the same shape, so it is easy to assemble and remove the frame, and adopts one that can be used multiple times. It is preferable. Moreover, it is also preferable to arrange a reinforcing material (not shown) on the outer periphery as needed so as not to be deformed with respect to the side pressure of the concrete immediately after placing.

  After the mold is assembled, concrete is placed in a space surrounded by the closing plate 11, the bottom mold, and the side mold. After curing for a predetermined period, the bottom mold and the side mold are removed. As shown in FIG. 1, the joint member 10 is surrounded by a closing plate 11, and a column beam joint portion 10 </ b> A in which concrete is filled is integrated with a column tip portion 10 </ b> B formed at an upper portion thereof. A composite structure. Further, the splicing plate 14 at the lower end of the end brace 13 is embedded in the concrete of the column leading portion 10B and does not interfere with the lower end of the column. For this reason, as will be described later, it is possible to easily install the upper floor pillar simply by positioning the upper floor precast concrete pillar member and placing it on the upper surface of the pillar leading portion 10B.

A building construction procedure using the joint member 10 as a precast member produced in the production yard of the construction site will be described with reference to FIGS.
Fig.5 (a) has shown the state by which the precast reinforced concrete pillar was standingly arranged in the predetermined floor. A plurality of column main bars protrude from the upper surface of the reinforced concrete column. Since this column main bar serves as a guide when installing the joint member 10 manufactured with high accuracy as a precast member, it is preferable to ensure the bar arrangement accuracy of the column main bar in the case of an in-situ reinforced concrete column.

  After the joint member 10 is placed on the upper surface of the reinforced concrete column, the installation position is held by a support (not shown), the steel beam 2 is joined to the end steel beam 12, and the brace 3 is joined to the end brace 13. (FIG. 5B). At this stage, it is also preferable to join a small beam (not shown) to the steel beam 2 to increase the rigidity of the steel frame. FIG. 6 shows that the concrete slab 6 of the corresponding floor is constructed from the construction stage of FIG. 5 (b), the reinforced concrete pillar 1 of the upper floor is built, and the joining with the joint member 10 is completed. It is explanatory drawing which showed the construction | assembly stage which builds the joint member 10 on the reinforced concrete pillar 1. FIG.

  In this way, it is possible to build a building frame by alternately stacking reinforced concrete columns 1 and joint members 10 that are precast members. However, it is possible to ensure the lamination accuracy of each member and to ensure the rigidity of the frame. In order to ensure, it is necessary to fix the column main reinforcement 5 in the joint member 10 and the reinforced concrete column 1 at the upper end of the column main reinforcement at an early stage. For this purpose, a grout filling path 25 communicating with the column main reinforcement fixing portion at the lower end of the reinforced concrete column 1 or the column main reinforcement insertion hole 26 of the joint member 10 is formed, and the grout is filled after the joint member 10 is installed on the pillar. It is preferable to integrate the reinforced concrete column 1 and the joint member 10 via the column main reinforcement 5. In addition, a speed-up process in which a plurality of joint members 10 and a plurality of steel beams 2 are grounded in advance on the ground to form a unit, and stiffen them so that no distortion occurs. Laws can also be adopted. In addition, as shown in FIG.5 (c), the brace 3 may be arrange | positioned toward the downward direction from the joint member 10. FIG. In this case, the column joint portion 10C is provided as a portion corresponding to the column tip portion 10B shown in FIG. 5A. To manufacture this portion, the same as the case of manufacturing the column tip portion 10B. What is necessary is just to produce the joint member 10 by performing work, and to join the reinforced concrete pillar 1 by replacing the top and bottom of the joint member 10.

  The joint member 10 that plays the role of joining the reinforced concrete pillars 1 on the upper and lower floors is a composite structure of steel and concrete capable of exhibiting a predetermined strength. Therefore, if the filled grout exhibits a predetermined strength, the upper floor Column load and beam bending moment can be borne. Therefore, since the main frame can be constructed in advance, it becomes possible to proceed with the construction of the building by the so-called “building escape construction method”.

By adopting the above-mentioned joint member, the following effects can be obtained.
(1) Since the axis of the brace member is not eccentric with respect to the center position of the joint, no additional bending moment is generated at the joint. Therefore, there is no need to reinforce the column ends, beam ends, and joints.
(2) A brace plate is inserted into a part of the joint member, and a specially shaped formwork is used for that part.However, since it is partial and can be diverted to the same shape, the work efficiency is reduced. Absent.
(3) Since the column member and the brace plate do not interfere with each other, the column member can be a rectangular parallelepiped precast member. For this reason, since the formwork for the precast member has a simple shape, the formwork can be easily manufactured, assembled, and disassembled, and the production cost and work cost can be reduced. In addition, when the column member is constructed by cast-in-place concrete, it is easy to process, assemble, and disassemble the on-site formwork. For this reason, a system formwork etc. can be employ | adopted, the frequency | count of diversion of a formwork increases, and cost reduction of material cost and work cost can be aimed at.

  In addition, this invention is not limited to the Example mentioned above, A various change within the range shown to each claim is possible. In other words, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

1 Reinforced concrete column 2 Steel beam 3 Brace 5 Column main reinforcement 6 Concrete slab 10 Column beam joint member
10A Column beam joint part 10B Column tip 11 Blocking plate 12 End steel beam 13 End brace 14 End plate 16 Sheath tube 17 Side form frame 25 Grout filling path 26 Column main reinforcement insertion hole

Claims (5)

Reinforced concrete column steel beam joining member consisting of precast members with braces arranged so that the member axis passes through the intersection of the member axis of the column and beam to be joined ,
A closing plate surrounding a portion where the beams converge so as to form an outer shape of the column;
A column main beam through hole is arranged in a space surrounded by the closing plate, and a column beam joint portion filled with concrete;
A concrete column leading portion that is manufactured integrally with the beam-column joint, and is located within a range in which an end of the brace interferes with a lower end or a part of the upper end of the column ;
A reinforced concrete column steel beam joining member, wherein a reinforced concrete column is joined to the concrete column leading portion. Attach the closing plate to form the outer shape of the column at the part where the steel beam where the braces are arranged converges so that the member axis passes through the intersection of the member axis of the column and beam to be joined,
Height side mold of which includes an end part and interfere the range of the lower end or upper end of the pillar brace attached to the upper or lower surface of the steel beam, collected in close contact with the upper end of the closing plate Paste,
Placing concrete in the space surrounded by the closing plate and the side mold, where the columnar muscle through holes are arranged,
A method for producing a reinforced concrete column steel beam joint member, wherein a column beam joint portion and a concrete column leading portion are integrally fabricated. Reinforced concrete columns with column main reinforcements with upper ends penetrating the beam-to-column joints are erected at predetermined intervals.
The beam-column joining member according to claim 1 is installed on the upper end surface of the reinforced concrete column, and a steel beam is installed between the reinforced concrete columns to hold the frame.
A reinforced concrete column on the upper floor is erected on the beam-column joining member,
At the lower end of the reinforced concrete column on the upper floor, the lower column main bar and the upper column main bar that penetrate the column beam joint are connected by a connecting means, and the upper floor steel beam and the lower floor steel beam A brace was installed between
A building construction method characterized in that a building is constructed by sequentially stacking reinforced concrete columns and beam-column joint members. The reinforced concrete column is a precast concrete member, said mounted erected on a concrete pillar destination beating section on, how to build a building according to claim 3 that will be joined to the beam-column joint member. The reinforced concrete column is a construction site concrete element, the concrete pillar destination beating section on the mold, assemble the reinforcing steel, is constructed concreting, building of claim 3 that will be joined to the beam-column joint member How to build.

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