Construction method of column-beam joint portion and partition member used in the construction method

Abstract

To prevent air from accumulating in a column-beam joint portion.SOLUTION: In a construction method of a column-beam joint portion, a column-beam joint portion 40 that is arranged at a part where a steel beam 3 in which an upper flange 31a and a lower flange 31b are connected by a web 31c intersects with a column member (an RC column 2) is surrounded by a closing steel plate 41 made of a square cross-section column, and concrete 24J which becomes a part of the column member is placed inside the closing steel plate 41 from an upper end opening of the closing steel plate 41. A concrete placing space inside the closing steel plate 41 is divided into a plurality of individual placing spaces F1 to F4 by a web 32c of a steel beam (a beam-joint bracket 32), and the concrete 24J is placed sequentially into the plurality of individual placing spaces F1 to F4 with partition members 90 extending vertically upward from an upper flange 32a of the steel beam (the beam-joint bracket 32) arranged between upper end openings of neighboring individual placing spaces.SELECTED DRAWING: Figure 8A

Description

[Technical Field]

[0001] The present invention relates to a construction method for a column-beam joint surrounded by a closing steel plate made of a rectangular cross-section column, which is arranged at the intersection of a column member such as a reinforced concrete column or a steel-reinforced concrete column and a steel beam, and a partition member used in the construction method. [Background technology]

[0002] A known example of a beam-column joint that is installed at the intersection of a steel beam and a column member is the beam-column joint disclosed in Patent Document 1 (Japanese Patent No. 7270095). This type of beam-column joint is surrounded by a closing steel plate made of a rectangular cross-section column, and concrete that will become part of the column member is poured inside the closing steel plate from the opening at the top end of the closing steel plate.

[0003] The concrete pouring space inside the sealing steel plate is divided into several individual pouring spaces by the webs of the steel beams (beam joint brackets) to which the sealing steel plate is welded. When pouring concrete (ready-mixed concrete) into the concrete pouring space from a concrete pump truck via pipes and hoses, careful pouring is required to prevent voids from forming under the upper and lower flanges of the steel beams.

[0004] However, both squeeze and piston concrete pump trucks have pulsations in the flow of ready-mixed concrete discharged from the hose tip, and the piston type has particularly large pulsations. This makes it difficult to pour ready-mixed concrete precisely in the desired location, and it is not uncommon for ready-mixed concrete to be poured simultaneously into multiple individual pouring spaces across the web 32c, as shown in Figure 12. This makes it easy for gaps to form below the upper and lower flanges.

[0005] If these air pockets (voids) exist, areas of the ready-mixed concrete will be left unfilled, and concrete settlement cracks will likely occur around these unfilled areas. For this reason, air vent holes 32h are formed as shown in Figure 3 of Patent Document 1 to release the air below the upper and lower flanges 32a, 32b, but this has not yet completely eliminated the air pockets.

[0006] Because the underside of the upper and lower flanges cannot be directly inspected with the naked eye, the current practice is to reduce the flow rate of the ready-mixed concrete and pour it slowly, which inevitably slows down the construction speed. Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, an object of the present invention is to provide a construction method for a column-beam joint that prevents air pockets from forming in the column-beam joint, and a partition member to be used in the construction method. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the construction method of the present invention for a column-beam joint is a construction method for a column-beam joint in which a column-beam joint arranged at a point where a steel beam, whose upper and lower flanges are connected by a web, intersects with a column member is surrounded by a closing steel plate made of a square cross-section column, and concrete that will become part of the column member is poured inside the closing steel plate from the upper end opening of the closing steel plate, characterized in that the concrete pouring space inside the closing steel plate is divided into a plurality of individual pouring spaces by the web of the steel beam, and concrete is poured sequentially into the plurality of individual pouring spaces with partition members extending vertically upward from the upper flange of the steel beam arranged between the upper end openings of adjacent individual pouring spaces. [Effects of the Invention]

[0009] According to the present invention, air pockets at column-beam joints can be suppressed. [Brief explanation of the drawings]

[0010] [Figure 1] This is an elevation view showing part of a building that uses a mixed RCS structure of reinforced concrete columns and steel beams. [Figure 2] FIG. 2 is a cross-sectional elevation view showing the configuration of the beam-column joint portion of FIG. [Figure 3] FIG. 2 is a horizontal cross-sectional view showing the configuration of the beam-column joint of FIG. [Figure 4] FIG. 2 is a perspective view showing the configuration of the beam-to-column joint portion of FIG. [Figure 5] FIG. 2 is a cross-sectional elevation view illustrating a method for constructing the beam-column joint of FIG. [Figure 6] FIG. 1 is a perspective view of a beam joining bracket. [Figure 7] FIG. [Figure 8A] This is a plan view of the partition member placed on the column-beam joint. [Figure 8B] FIG. 10 is a perspective view showing the state in which a partition member is placed on a column-beam joint. [Figure 8C] FIG. 10 is a perspective view showing a first modified example of the partition member. [Figure 8D] FIG. 10 is a perspective view showing a second modified example of the partition member. [Figure 9A] 1A to 1D are plan views showing states in which concrete is sequentially poured into a plurality of individual pouring spaces inside a closing steel plate. [Figure 9B] 9A(a) is an elevation view and a plan view showing the initial stage of pouring concrete, and FIG. 9B is an elevation view and a plan view showing the intermediate stage of pouring concrete. [Figure 10] FIG. 10 is an elevation view of an embodiment in which a concrete filling detection sensor is attached to a closing steel plate. [Figure 11] This is an elevation view showing several types of column members to be joined to S-beams. [Figure 12] FIG. 10 is a cross-sectional elevation view showing a conventional method for constructing a column-beam joint. DETAILED DESCRIPTION OF THE INVENTION

[0011] ●Column-beam joints in RCS mixed structure Hereinafter, a beam-column joint and its construction method according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an elevation view showing a part of a building that uses an RCS mixed structure of reinforced concrete columns and steel beams. A beam-column joint 40 according to the embodiment is disposed at the intersection of an RC column 2 and a steel beam 3 as column members.

[0012] Fig. 2 is an elevational cross-sectional view of a column-beam joint 40, Fig. 3 is a horizontal cross-sectional view of Fig. 2, and Fig. 4 is a perspective view of the column-beam joint 40. As shown in Fig. 1, a building 1 includes a plurality of reinforced concrete columns 2 extending in the vertical direction and steel beams 3 erected between adjacent reinforced concrete columns 2 on each floor of the building 1. The reinforced concrete columns 2 and the steel beams 3 are joined to each other at column-beam joints 40.

[0013] As shown in Figs. 1 to 3, the RC column 2 is made of reinforced concrete and mainly comprises column main reinforcements 21 and concrete 24. The column main reinforcements 21 extend in the vertical direction, and a plurality of them (3 x 4 = 12 in Fig. 3) are arranged within the cross section of the RC column 2. The concrete 24 has, for example, a rectangular shape in plan cross section, and is provided so as to embed the column main reinforcements 21.

[0014] The RC column 2 has a column-like portion 2C extending in the vertical direction, which corresponds to the main body of the RC column 2, between the column-beam joints 40 located above and below each other. The column-like portion 2C includes shear reinforcement bars 22 in addition to the column main reinforcement bars 21 and concrete 24.

[0015] A plurality of shear reinforcement bars 22 are provided at intervals in the vertical direction. Each shear reinforcement bar 22 is arranged so as to surround a column main reinforcement bar 21. In the column-shaped portion 2C, concrete 24 is provided so as to bury these column main reinforcement bars 21 and shear reinforcement bars 22.

[0016] As shown in Figure 1, the steel beam 3 comprises a steel beam main body 31 and a beam joint bracket 32 ​​provided at a beam-column joint 40. The steel beam main body 31 integrally comprises an upper flange 31a provided in a horizontal plane, a lower flange 31b provided below and parallel to the upper flange 31a, and a web 31c located in a vertical plane and provided to vertically connect the upper flange 31a and the lower flange 31b. The end of the steel beam main body 31 is joined to the beam joint bracket 32 ​​via a joint plate 34.

[0017] The beam joint brackets 32 are provided so as to protrude from the RC column 2 in the direction in which the steel beams 3 extend. For example, when the RC column 2 is placed inside the building 1 and the steel beams 3 are joined to the RC column 2 on all four sides as shown in Fig. 3, the beam joint brackets 32 are provided so as to extend from the RC column 2 on all four sides.

[0018] Here, the beam joint brackets 32 located on opposite sides of the RC column 2 are continuous in a straight line. That is, at the beam-column joint 40 of the RC column 2 to which steel beams 3 are joined on all four sides, the beam joint brackets 32 are provided in a cross shape in plan view. Furthermore, a portion of each beam joint bracket 32 ​​is embedded in the concrete 24J of the beam-column joint 40, and the remaining portion is provided protruding from the concrete 24J along the extension direction of each of the four steel beams 3 joined to the RC column 2.

[0019] 2, each beam-connecting bracket 32 ​​integrally comprises an upper flange 32a provided in a horizontal plane, a lower flange 32b provided below and parallel to the upper flange 32a, and a web 32c located in a vertical plane and provided to vertically connect the upper flange 32a and the lower flange 32b. The slab 5 is formed by pouring concrete to a predetermined thickness above the upper flange 32a.

[0020] As shown in Fig. 3, a closing steel plate 41 is provided at the beam-column joint 40. The slab 5 is formed up to the outside of the closing steel plate 41. After concrete 24J is poured inside the closing steel plate 41, the slab 5 is also formed on the closing steel plate 41 as shown in Fig. 2.

[0021] The closing steel plates 41 are provided between adjacent webs 32c of the beam-joint bracket 32 ​​in the circumferential direction of the RC column 2. Each closing steel plate 41 is roughly L-shaped in plan view, and has a first surface 41a perpendicular to the extension direction of one of the adjacent webs 32c of the beam-joint bracket 32, and a second surface 41b perpendicular to the extension direction of the other web 32c.

[0022] 2, the ends of the first surface 41a and the second surface 41b of each closing steel plate 41 are provided so as to close the gap between the upper flange 32a and the lower flange 32b of the beam-joining bracket 32 ​​that constitutes the steel beam 3. That is, the ends of the first surface 41a and the second surface 41b of the closing steel plate 41 are welded to the lower surface of the upper flange 32a of the beam-joining bracket 32, the upper surface of the lower flange 32b, and the side surface of the web 32c.

[0023] Furthermore, in the closing steel plate 41, a corner 41c where the first surface 41a and the second surface 41b intersect can be formed at a right angle to form an L-shape in plan view. By providing such closing steel plates 41 that are approximately L-shaped in plan view between the beam joint brackets 32 extending in all directions from the RC column 2, these closing steel plates 41 form a rectangular cross-section column 45 that is rectangular in plan view and extends in the vertical direction.

[0024] The beam-column joint 40 has a joint body 40A as shown in Figure 2. The joint body 40A is formed by pouring concrete 24J inside a closing steel plate 41 (a rectangular cross-section column 45). In the joint body 40A, column main reinforcement bars 21 are arranged to extend in the vertical direction.

[0025] As shown in Fig. 3, multiple column main reinforcements 21 (3 x 4 = 12) are arranged on the outer periphery of the RC column 2. The column main reinforcements 21 arranged on the outer periphery of the RC column 2 are arranged between adjacent webs 32c of the beam-joint bracket 32.

[0026] 2, in the joint body 40A, only the column main reinforcement bars 21 are provided, and no shear reinforcement bars are provided. In other words, no shear reinforcement bars are provided between the upper flange 32a and the lower flange 32b of the beam joint bracket 32, inside the closing steel plate 41. In addition, at the intersection of the beam joint brackets 32, air vent holes 32h are formed vertically penetrating the upper flange 32a and the lower flange 32b to vent air during concrete pouring.

[0027] In the beam-column joint 40, the concrete 24J of the joint body 40A can be made of high-strength concrete if necessary. The joint body 40A is constructed by pouring concrete in situ integrally with the upper end portion of the column-shaped portion 2C formed by the formwork MB in Figure 4, and is connected to the column-shaped portion 2C of the column body below.

[0028] 1, a brace 50 is provided between steel beams 3, 3 positioned above and below each other. The brace 50 has both ends joined to the middle part of the steel beam 3 and the beam-to-column joint 40, for example.

[0029] The end of the brace 50 is joined to the beam-column joint 40 via a joint plate 51. The joint plate 51 is joined to the beam joint bracket 32 ​​by welding or the like. A part of the joint plate 51 is embedded in the concrete 24 of the RC column 2, and the remaining part is exposed to the outside of the RC column 2.

[0030] ● Construction method for column-beam joints To construct the beam-column joint 40, first, an RC column 2 is constructed as shown in Fig. 5. That is, shear reinforcement bars 22 are connected to the column main reinforcement bars 21, and the column main reinforcement bars 21 are surrounded by formwork.

[0031] The column 2C is then formed by pouring concrete 24. The concrete 24 of the column 2C may be poured in place, or the concrete 24 may be precast concrete, in which case the concrete 24 is molded in advance. Alternatively, the beam connection bracket 32 ​​may be integrated with the concrete 24 of the column 2C to form a precast concrete structure.

[0032] Next, as shown in Fig. 6, a beam joint bracket 32 ​​having a cross shape in plan view and having a closing steel plate 41 welded thereto is hung by a crane and inserted into the upper end of the column main reinforcement 21. Then, the lower flange 32b of the beam joint bracket 32 ​​is placed on the upper end surface of the formwork MB that has been installed at the upper end of the column part 2C with ensuring accuracy in the height direction, as shown in Figs. 2 and 4.

[0033] Finally, concrete 24J is poured inside the closing steel plate 41 as shown in Figures 2 and 3. Details of the pouring method will be described later with reference to Figures 8A, 9A, and 9B.

[0034] The closing steel plate 41 is a square cylindrical body with right-angled or curved corners 41c, and is welded to the web 32c and the upper and lower flanges 32a, 32b of the steel beam 3. When pouring concrete 24J into the beam-column joint 40, the closing steel plate 41 functions as a formwork (bearing plate) that covers the periphery of the beam-column joint 40.

[0035] ● Pouring concrete using partition materials 6 and 7 are perspective views of a beam-column joint 40 in which a closing steel plate 41 is welded to a beam joint bracket 32. The concrete pouring space inside the closing steel plate 41 is divided into four individual pouring spaces F1-F4 by the four webs 32c of the beam joint bracket 32. The lower ends of the individual pouring spaces F1-F4 are connected to each other via the inside of the formwork MB in FIG.

[0036] The construction method of this embodiment is characterized in that, with the partition member 90 placed on the top surface of the beam-connecting bracket 32 ​​as shown in Fig. 8A, the worker M sequentially pours concrete into the four individual pouring spaces F1-F4. From the viewpoint of workability, the pouring order is preferably clockwise or counterclockwise, but it is also possible to pour concrete in any order.

[0037] The partition member 90 has four plate members 91, which are assembled in a roughly cross shape in plan view and welded together. The shape of the partition member 90 can be any shape as long as it separates the upper end openings of adjacent individual concrete pouring spaces F1-F4 and extends vertically upward from the upper flange of the steel beam (the upper surface of the beam joining bracket 32).

[0038] If necessary, lighting means 93 such as an LED lamp can be provided on the upper end of the plate member 91. By illuminating the interior of the individual pouring spaces F1-F4 with the lighting means 93, the concrete pouring status (filling status) in the individual pouring spaces F1-F4 can be easily visually confirmed even in a dark working environment.

[0039] Therefore, it becomes easy for one worker M to fill the inside of the sealing steel plate 41 with ready-mixed concrete without any gaps. To make it even easier to check the filling status of the ready-mixed concrete, a sensor that can tell when concrete has been filled can be placed or a through-hole can be formed at the position indicated by P on the upper side of the sealing steel plate 41 as shown in Figure 4. Conventionally, because the upper and lower floors are blocked off by the slab 5 as shown in Figure 2, even if another worker was placed on the floor below and wanted to visually check for concrete leaking from gaps G in Figure 4 or the like to check the concrete pouring status (filling status), it was very difficult for the worker M on the floor above to cooperate.

[0040] A rectangular vertical hole 92 is formed in the center of the welding side of the partition member 90. A bolt B standing in the center of the upper flange 32a is inserted into this vertical hole 92 as shown in FIG. 8B.

[0041] 8A about the bolt B. The horizontal length of the plate member 91 should preferably be limited to a length that does not interfere with the column main reinforcement 21.

[0042] The direction and position of illumination of the lighting means 93 can be changed by appropriately rotating the partition member 90 around the bolt B. This allows for more detailed confirmation of the concrete pouring status in the individual pouring spaces F1-F4.

[0043] It is not necessary for the partition member 90 to be rotatable. The partition member 90 may also be fixedly engaged with the upper end openings of the individual casting spaces F1-F4.

[0044] As shown in Figure 8A, the partition member 90 is positioned at a predetermined rotational position, and the individual pouring spaces F1-F4 are separated by the plate members 91. In this state, concrete is poured first from the individual pouring space F1. During pouring, the concrete is vibrated with a vibrator to improve the filling properties of the concrete.

[0045] Next, concrete is poured into the individual pouring spaces F2⇒F3⇒F4, for example. The concrete may be poured clockwise, such as in the individual pouring spaces F1⇒F2⇒F4⇒F3, or counterclockwise, such as in the individual pouring spaces F1⇒F3⇒F4⇒F2. The partition member 90 can be embedded in the columnar portion 2C after the concrete has been poured.

[0046] In this way, because the individual pouring spaces F1-F4 are separated by the plate member 91, even if ready-mixed concrete is discharged with large pulsations from the hose H held by the worker M, the ready-mixed concrete will not go beyond the plate member 91 and enter other pouring spaces. Therefore, it is possible to prevent gaps from occurring below the upper and lower flanges 32a, 32b of the steel beam.

[0047] Partition member variation 1 The partition member 90 is not limited to the shape shown in Figures 8A and 8B. Figure 8C is a perspective view showing a first modified example of the partition member 90.

[0048] The partition member 90 of the first modification has two plate members 91 connected in an L-shape. The partition member 90 can be rotated by 90 degrees at a time, allowing concrete to be poured into the individual pouring spaces F1⇒F2⇒F3⇒F4 in that order, for example.

[0049] Partition member variation 2 8D is a perspective view showing Modification 2 of partition member 90. Partition member 90 of Modification 2 has two plate members 91 connected in an L shape and a connecting plate 94. Engagement portions 95 are formed at the lower ends of the two plate members 91 for engaging with the edge of upper flange 32a.

[0050] The partition member 90 is lifted slightly and rotated 90 degrees at a time, so that the engaging portions 95 of the two plate members 91 engage with the edges of the upper flanges 32a of the individual concrete pouring spaces F1-F4. Concrete can then be poured into the individual concrete pouring spaces F1 ⇒ F2 ⇒ F3 ⇒ F4, for example.

[0051] ●Changes in concrete pouring conditions 9A(a)⇒(b)⇒(c)⇒(d) show the changes in the concrete pouring state when concrete is poured in the order of F1⇒F2⇒F3⇒F4. Concrete 24J at the lower end (above the lower flange 32b) of the joint body 40A is shown in light ink.

[0052] As can be seen from Fig. 9A, by sequentially pouring concrete into the four individual pouring spaces F1-F4 (pouring ports 1-4), the air in the joint body 40A can be smoothly expelled to the outside. Therefore, concrete 24J can be evenly distributed throughout the entire joint body 40A without creating air pockets (voids) below the upper and lower flanges 32a, 32b as shown in Fig. 11.

[0053] 9B shows the change in the pouring state of concrete 24J at the beginning and middle of pouring when pouring concrete into individual pouring space F1 (pouring port 1) as shown in FIG. 9A(a). As shown in FIGS. 9B(a1) and (b1), at the beginning of pouring, concrete 24J is completely poured into the lower end of individual pouring space F1 (pouring port 1), and some of the concrete 24J flows into the adjacent individual pouring spaces F2 and F3 through the formwork MB at the lower end of individual pouring space F1. At this stage, almost no concrete 24J has yet flowed into individual pouring space F4, which is diagonally opposite individual pouring space F1.

[0054] As shown in Figures 9B(a2) and (b2), during the middle stage of pouring, concrete 24J is completely poured into the lower ends of all individual pouring spaces F1-F4, including inside the formwork MB. The pouring height of concrete 24J in individual pouring space F1 is about 50%. In addition, the pouring height of concrete 24J in individual pouring space F4, diagonally opposite to the adjacent individual pouring spaces F2 and F3, is about 20%.

[0055] At the end of the pouring stage, the pouring height of concrete 24J in individual pouring space F1 will be 100%, and the pouring height of concrete 24J in the other individual pouring spaces F2-F4 will be about 50%. Once pouring of concrete 24J in individual pouring space F1 is complete, concrete is poured into the other individual pouring spaces F2-F4 in the order F2⇒F3⇒F4.

[0056] By sequentially pouring concrete into the individual pouring spaces F1-F4 in this manner, the pouring height of the concrete in the individual pouring spaces F1-F4 can be increased stepwise or gradually, thereby allowing the air in the joint body 40A to be smoothly expelled to the outside.

[0057] In particular, air can be effectively pushed out from the underside of the upper flange 32a and the lower flange 32b, where air accumulation was likely to occur with conventional construction methods, thereby preventing air accumulation below the upper flange 32a and the lower flange 32b.

[0058] ●Concrete filling detection sensor 10 is an elevation view of an embodiment in which sensors S1 to S3 for detecting filling of concrete 24J are attached to a sealing steel plate 41. The three sensors S1 to S3 are attached at equal intervals in the height direction of the sealing steel plate 41 in the order of low position, middle position, and high position.

[0059] The sensors S1 to S3 may be, for example, a lighting sensor as disclosed in Patent Document 2 (Japanese Patent Laid-Open Publication No. 2005-248471), which detects the filling of concrete 24J by passing electricity through a pair of terminals protruding inside the sealing steel plate 41. Alternatively, the sensors S1 to S3 may be, for example, an acceleration sensor as disclosed in Patent Document 3 (Japanese Patent No. 6482331), which detects the filling of concrete 24J by detecting the vibration of a vibrator that improves the filling efficiency when pouring concrete.

[0060] The number of sensors S1 to S3 may be increased or decreased as appropriate. In the embodiment of Fig. 10, the low-position sensor S1 is disposed above the lower flange 32b, and the high-position sensor 3 is disposed below the upper flange 32a. The middle-position sensor 2 is disposed exactly midway between the upper and lower sensors 1 and 3. There does not necessarily need to be multiple sensors S1 to S3; for example, it is sufficient to have either the middle-position sensor S2 or the high-position sensor S3.

[0061] Meanwhile, LED lamps L1 to L3 are arranged in a horizontal band on a plate member 91 of the partition member 90. These LED lamps L1 to L3 constitute an alarm means, and are configured to receive signals from sensors S1 to S3 wirelessly via Bluetooth or the like and light up in sequence.

[0062] That is, when the filling height of the concrete 24J inside the sealing steel plate 41 exceeds the low-position sensor S1, the lowest LED lamp L1 lights up first, as shown in Figure 10(a), and similarly, when the filling height exceeds the middle-position sensor S2, the second-lowest LED lamp L2 also lights up, as shown in Figure 10(b), and when the filling height reaches sensor S3, all of the LED lamps L1 to L3 light up, as shown in Figure 10(c). In this way, the filling height of the concrete 24J inside the sealing steel plate 41 can be easily visually confirmed by the sensors S1 to S3 and the LED lamps L1 to L3, making it easier for the worker M to pour the concrete.

[0063] As a notification means in place of the LED lamps L1 to L3, a speaker may be attached to the plate member 91 of the partition member 90. The detection results of the sensors S1 to S3 can also be notified by sound from the speaker.

[0064] For example, as the sensors S1 to S3 detect in sequence, the interval between intermittent sounds emitted from the speaker can be shortened in stages. Alternatively, as the sensors S1 to S3 detect in sequence, the speaker can emit a synthesized voice saying, "First height completed," "Second height completed," "Third height completed," etc. The LED lamps L1 to L3 and the speaker can be made detachable from the plate member 91 so that they can be reused.

[0065] Summary Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications are possible. For example, the column member to which the steel beam 3 is joined is not limited to the RC column 2. As shown in Figure 11(a), the present invention can also be applied to a construction method for a beam-column joint that joins a steel beam (S beam) to a steel-framed reinforced concrete column (SRC column).

[0066] The present invention can also be applied to a construction method for a column-beam joint when connecting an S column to the top end of an RC column, as shown in Figure 11(b).The present invention can also be applied to a construction method for a column-beam joint where the S beam has a step or eccentricity.

[0067] Furthermore, the beam joint bracket 32 ​​is cross-shaped in plan view when the RC column 2 is placed inside the building 1, but can be T-shaped in plan view when the RC column 2 is placed inside the exterior wall of the building 1. Furthermore, it can be L-shaped in plan view when the RC column 2 is placed at the corner of the building 1. The construction method and partition member of the present invention can also be used in column-beam joints that have such T-shaped or L-shaped beam joint brackets in plan view. [Explanation of symbols]

[0068] 1: Building 2: RC column 2C: Column 3: Steel beam 5: Slab 21: Main column reinforcement 22: Cross-section reinforcement 24: Concrete 24J: Concrete 31: Steel beam body 31a: Upper flange 31b: Lower flange 31c: Web 32: Beam connection bracket 32a: Upper flange 32b: Lower flange 32c: Web 32h: Air vent hole 34: Joint plate 40: Column-beam joint 40A: Joint body 41: Closing steel plate 41a: First side 41b: Second side 41c: Corner 42: Bottom closing steel plate 43, 44: Shear reinforcement 45: Square cross-section column 50: Brace 51: Joint plate 80: Nut 81: Beam support member 90: Partition member 91: Plate member 92: Vertical hole 93: Lighting means 94: Connecting plate 95: Engagement part B: Bolts F1-F4: Individual casting spaces L1~L3: LED lamp (notification means) MB: Formwork S1 to S3: Sensors [Prior art documents] [Patent documents]

[0069] [Patent Document 1] Patent No. 7270095 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-248471 (illumination sensor 3 in FIG. 2) [Patent Document 3] Patent No. 6482331 (Acceleration sensor 6 in Figure 2)

Claims

1. A method for constructing a column beam joint, in which a steel beam having an upper flange and a lower flange connected by a web intersects with a column member, is surrounded by a closing steel plate made of a rectangular cross section column, and concrete that will become part of the column member is poured from an upper end opening of the closing steel plate to the inside of the closing steel plate, A method for constructing a beam-column joint, characterized in that the concrete pouring space inside the closing steel plate is divided into a plurality of individual pouring spaces by the web of the steel beam, and concrete is poured sequentially into the plurality of individual pouring spaces with partition members extending vertically upward from the upper flange of the steel beam disposed between the upper end openings of adjacent individual pouring spaces.

2. 2. The method for constructing a beam-column joint according to claim 1, wherein the column member is a reinforced concrete column or a steel-reinforced concrete column.

3. A construction method for a column-beam joint as described in claim 1, characterized in that the partition member is cross-shaped when viewed in a plane and the center portion of the cross is supported by the upper flange of the steel beam located in the center of the concrete pouring space.

4. 4. The method for constructing a beam-column joint according to claim 3, wherein the central portion of the cross is rotatably supported by the upper flange.

5. 2. The method for constructing a beam-column joint according to claim 1, wherein the partition member is provided with a lighting means for illuminating the individual concrete pouring spaces.

6. 2. The method for constructing a beam-column joint according to claim 1, wherein the partition member is formed with an engaging portion that engages with the upper end opening of the individual concrete pouring space.

7. A partition member used in the construction method of a column-beam joint of any one of claims 1 to 6, which extends vertically upward from the upper flange of the steel beam between the upper end openings of adjacent individual casting spaces inside the filling steel plate.

8. 8. A partition member according to claim 7, further comprising lighting means for illuminating the individual concrete pouring spaces.

9. A partition member according to claim 7, characterized in that an engaging portion is formed to engage with an upper end opening of the individual concrete pouring space.

10. A partition member as claimed in claim 7, characterized in that one or more sensors for detecting the concrete filling height are attached to the blocking steel plate, and the detection results of the sensors are displayed by one or more alarm means attached to the partition member.

11. A partition member as claimed in claim 10, characterized in that a plurality of sensors are attached at predetermined intervals in the height direction of the blocking steel plate, and the detection results of each sensor are displayed in sequence by the plurality of alarm means as the concrete filling progresses.

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