JP2005171728A - Bar arrangement structure in reinforced concrete-constructed beam-column connection part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide bar arrangement structure in beam-column connection which enables reduction in the limit of a bar arrangement space and arrangement of beam reinforcements, without setting of level difference and further prevention of pulling of the beam reinforcements. <P>SOLUTION: A main column reinforcement 11 and beam reinforcements 21A-21D and 31A-31D are arranged in a beam-column connection part C1, in which a column 1 and beams 2, 3 are connected. The main beam reinforcements 21A-21D and 31A-31D have a fixing length which is not more than a half of width of the column 1. The right main beam reinforcements 21A-21D and the left main beam reinforcements 31A-31D do not interfere with each other, and the right beam 2 and the left beam 3 are made to be the same level. Fixing nuts 22, 32 are mounted on the top ends of the main beam reinforcements 21A-21D and the main beam reinforcements 31A-31D, respectively and fixing plates 23, 23 are formed at the top end of the fixing nut 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bar arrangement structure in a reinforced concrete column beam joint.

  When joining columns and beams of reinforced concrete buildings, a plurality of beams are often joined to one column. In such a beam-column joint, the reinforcing bars are arranged so as to intersect with each other by taking a level difference between the reinforcing bars that are not on the same straight line.

  An example of a conventional column beam joint is disclosed in Japanese Patent Application Laid-Open No. 11-29979. This beam-to-column joint has a structure in which the beam main bar is fixed inside the column main bar via a joint, and this joint is composed of four fixing brackets having fitting grooves that can be assembled in a cross beam shape. The ends of the main bars of the beam are fixed to the metal fittings, and the fixing metal fittings are fixed to the inside of the column by fixing the fixing metal fittings to each other in a cross-beam shape. By using such four fixing brackets, the pulling-out force of the beam main bars is made orthogonal to obtain high fixing performance.

  Another column beam connection structure is disclosed in Japanese Patent No. 2662150. In this beam-to-column connection structure, a beam-to-column connection structure is disclosed in which beams are bonded to the column from two directions facing each other, and the beam main reinforcement is inserted and fixed to the back of the column. (See FIGS. 11 and 18).

Furthermore, as another column beam connection structure, there is one disclosed in Japanese Patent Application Laid-Open No. 2000-355976. This column beam connection structure has spiral hoop bars that extend spirally along the longitudinal direction of the reinforced concrete column from the top to the bottom of the column-to-beam connection region and whose outer periphery is positioned so as to contact the column main reinforcement of the reinforced concrete column. It is provided.
Japanese Patent Laid-Open No. 11-29979 Japanese Patent No. 2661250 (FIGS. 11 and 18) JP 2000-355976 A

  However, the beam-column joint structure disclosed in Patent Document 1 is applied to a beam-column joint structure in which beams are joined from four directions on the side of the column, and requires a plurality of fixing brackets to obtain fixing force. It is. For this reason, there are problems that the number of members in the joint portion increases and the bar arrangement space is limited.

  Moreover, in the column beam connection structure disclosed in Patent Document 2, a column beam structure in which beams facing each other from two directions are bonded to a column is disclosed. In this column beam structure, a column reinforcing bar is disclosed. Because of the long anchorage length, beam reinforcements facing each other overlap. In order to avoid this overlap, there is a problem that a level difference must be provided between the beam main bars facing each other.

  On the other hand, in the column beam joint structure disclosed in Patent Document 3, the joint is reinforced using spiral hoop bars. However, the spiral hoop is provided as a concrete reinforcing means for suppressing the destruction of the concrete due to the shear stress generated in the concrete placed in the joining region when a tensile force acts on the concrete beam. It is a thing. For this reason, it is only what suppresses destruction of the concrete at the time of arrange | positioning a beam orthogonally, for example, cannot pull out that a beam reinforcement is pulled out from a pillar.

  Accordingly, an object of the present invention is to reduce the limitation of the reinforcing bar space, to arrange the beam reinforcing bars of the beams without providing a level difference, and to further prevent the beam reinforcing bars from being pulled out. The object is to provide a bar arrangement in beam connection.

  The present invention that has solved the above problems is a fixed length of a beam reinforcing bar provided on a beam in a reinforcing structure in a beam-to-column connection part of a reinforced concrete structure in which beams are bonded to a column from two directions facing each other. Is less than half the width of the column, and a reinforcing bar fixing tool is attached to the tip of the beam reinforcing bar.

  In the bar arrangement structure at the beam-column joint according to the present invention, the fixing length of the beam reinforcement provided on the beam with respect to the column is set to be half or less of the column width. For this reason, it is possible to prevent the beam reinforcing bars of the beams facing each other from overlapping each other at the joint portion with the column, so that it is not necessary to provide a level difference. Here, since the fixing length is shortened, the fixing strength is reduced. However, in the bar arrangement structure at the joint portion of the column beam according to the present invention, a reinforcing bar fixing tool is provided at the tip of the beam reinforcing bar. By providing this reinforcing bar fixing tool, it is possible to improve the fixing strength of the beam reinforcing bar sufficiently and to prevent the beam reinforcing bar from being pulled out. Moreover, since only the reinforcing bar fixing tool is attached to the tip of the beam reinforcing bar, a large amount of reinforcing bar space can be eliminated.

  Here, the reinforcing bar fixing tool may be a fixing plate. Further, the beam may be provided with a plurality of beam reinforcing bars adjacent to each other, and the reinforcing bar fixing tool may be a fixing plate that connects adjacent beam reinforcing bars.

  Thus, a fixing plate or the like can be used as the fixing tool.

  Furthermore, the present invention that has solved the above-mentioned problems is a beam reinforcing bar provided at each of the beams facing each other in the reinforcing bar structure at the beam-to-column connection portion of the reinforced concrete structure in which the beams are bonded to the column from two directions facing each other. Reinforcing hoop bars are provided to transmit the stress generated by the beam to the beam reinforcing bars of the beams facing each other.

  In the bar arrangement structure at the column beam joint according to the present invention, reinforcing hoop bars are provided to transmit the stress generated by the beam reinforcing bars provided to the beams facing each other to the beam reinforcing bars of the beams facing each other. The reinforcing hoop bars can prevent the beam bars from being pulled out.

  Moreover, the installation shape of a reinforcement hoop line | wire can be made into the aspect which is a substantially circular shape or a substantially square shape.

  Reinforcing hoops can be installed in such a shape. The “substantially circular” in the present invention includes not only a circular shape but also a shape close to a circular shape such as an elliptical shape or an oval shape. The “substantially square” includes not only regular polygons such as squares, regular pentagons and regular hexagons, but also shapes obtained by slightly deforming these, and shapes obtained by chamfering these corners.

  Furthermore, it can also be set as the aspect by which the reinforcement board is provided in the column head position or column base position located in the vicinity of a column beam junction part.

  By providing such a reinforcing plate, it is possible to suitably prevent the destruction of the concrete forming the column in the vicinity of the column beam joint.

  According to the present invention, it is possible to arrange the beam reinforcing bars of the beams without reducing the limitation of the reinforcing bar space and provide a level difference, and to further prevent the beam reinforcing bars from being pulled out. It is possible to provide a bar arrangement structure in a beam connection.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted. FIG. 1 is an elevational sectional view of a column beam joint having a reinforcing bar structure according to the first embodiment of the present invention, and FIG. 2 is a plan sectional view thereof. The bar arrangement according to this embodiment is provided with a reinforced concrete building.

  As shown in FIGS. 1 and 2, in the column beam joint C <b> 1 having the bar arrangement structure according to the present embodiment, a reinforced concrete column (hereinafter referred to as “column”) 1 includes a plurality of reinforced concrete beams (hereinafter referred to as “beam”). 2 and 3 are joined. A plurality of column main reinforcing bars (column reinforcing bars) 11 extending in the vertical direction are arranged on the column 1. As shown in FIG. 2, twelve of these column main bars 11 are provided with respect to the column 1 and are arranged at equal intervals around the column.

  A plurality of reinforcing bars 12 are attached at predetermined intervals in the height direction so as to wrap around the outer periphery of the column main bars 11. The reinforcing bars 12 are wound around different column main bars 11 depending on the height position, and the column main bars 11 are evenly reinforced in the height direction. For example, two reinforcing bars 12 can be combined from two U-shaped ones and inserted in the longitudinal direction of the pillar perpendicular to the beams 2 and 3.

  Further, in the column beam joint C 1, the two beams 2 and 3 facing each other are joined to the column 1 so as to be orthogonal to the column 1. The beams 2 and 3 are provided with a plurality of beam reinforcing bars (beam reinforcing bars) 21A to 21D and 31A to 31D extending in the horizontal direction. The beam main bars 21A to 21D and 31A to 31D are configured such that the first and second bars are arranged vertically on the beams 2 and 3, respectively, and a total of 16 columns in 4 columns and 4 columns are provided. Yes. In this specification, these beam main bars will be described as the first beam main bars 21A and 31A, the second beam main bars 21B and 31B, the third beam main bars 21C and 31C, and the fourth beam main bars 21D and 31D in order from the top. The beams 2 and 3 are made of so-called full precast, and the 16 beam main bars 21A to 21D and 31A to 31D are arranged, transported to the column beam joint C1 in a state where concrete is placed, and joined to the column 1 Is done.

  A female thread portion is formed at the tip of each beam 2, 3, and fixing nuts 22, 32 are screwed into the female thread portion. Fixing plates 23 and 33 which are reinforcing bar fixing tools of the present invention are formed on the heads of the fixing nuts 22 and 32.

  The two beams 2 and 3 joined to the column 1 are both arranged at the same height with respect to the column 1, and the fixing nuts 22 and 32 are arranged to face each other. . Further, the fixing length of the beam main bars 21 </ b> A to 21 </ b> D and 31 </ b> A to 31 </ b> D at the joint portion with the column 1 is set to be half or less of the width of the column 1. The width | variety of the pillar 1 here says the length between the surfaces where the two beams 2 and 3 are each joined.

  Further, in the upper part of the first beam main bars 21A and 31A of the beam main bars 21A to 21D and 31A to 31D and between the first beam main bars 21A and 31A and the second beam main bars 21B and 31B in the column beam joint C1. A stress transmission muscle 13 is attached to the main muscle 11. The stress transfer bars 13 are also provided below the fourth beam main bars 21D and 31D of the beam main bars 21A to 21D and 31A to 31D and between the third beam main bars 21C and 31C and the fourth beam main bars 21D and 31D. ing. By these stress transmission bars 13, the forces from the beam main bars 21A to 21D and 31A to 31D can be transmitted to the joint. The stress transmission bar 13 can be attached to the column main bar 11 by combining two U-shaped ones and inserting them from the front-rear direction of the column 1 orthogonal to the beams 2 and 3.

  Further, reinforcing steel plates 41 and 42 may be provided respectively at the column head position and the column base position located in the vicinity of the column-beam joint C1 in the column 1. The reinforcing steel plates 41 and 42 are respectively provided at the positions of the columns 1 that are continuous with the beam-column joints C1 to prevent concrete cone breakage at the beam-column joints C1.

  The construction procedure of the bar arrangement structure according to this embodiment having the above configuration will be described.

  First, the column 1 is constructed to a position below the column beam joint C1 that forms the bar arrangement structure. At this time, twelve column main bars 11 protrude from the beam-column joint C1 at the beam-column joint C1. The beams 2 and 3 are joined to the column-beam joint C1 in this state from both sides. As described above, the beams 2 and 3 are made of full precast, and concrete is previously placed and carried in at a factory with the 16 beam main bars 21A to 21D and 31A to 31D protruding from the side. . The beam main bars 21A to 21D and 31A to 31D protruding from the side are arranged in the column beam joint C1, and the column 1 and the beams 2 and 3 are joined.

  In order to join the beams 2 and 3, the beams 2 and 3 are respectively inserted from both sides of the beam-to-column joint C1, and the beam main bars 21A to 21D and 31A to 31D are fixed with a fixing length that is half or less of the width of the column 1. It arrange | positions in the column beam junction part C1. At this time, since the beam main bars 21A to 21D and 31A to 31D have a fixing length that is less than half the width of the column 1, the beam main bars 21A to 21D and 31A to 31D of the beams 2 and 3 facing each other interfere with each other. You can avoid it. Accordingly, the beams 2 and 3 facing each other can be arranged at the same height position.

  When the beams 2 and 3 facing each other are thus arranged, the reinforcing bars 12 and the stress transmission bars 13 are attached to the column main bars 11. The reinforcing bar 12 and the stress transmission bar 13 are sequentially attached to the column main bar 11 at the column beam joint C1. After the reinforcement bars 12 and the stress transmission bars 13 are attached, concrete is placed on the beam-column joint C1. Since the reinforcing bars 12 are attached to the column main bars 11, the load borne by the fixed beam main bars 21A to 21D and 31A to 31D can be transmitted to the entire column beam joint C1. The stress transmission bar 13 includes beam main bars 21A to 21D and 31A to 31D, the upper part of the first beam main bars 21A and 31A, the lower part of the fourth beam main bars 21D and 31D, the first beam main bars 21A and 31A and the second beam. By attaching between the main bars 21B and 31B and between the third beam main bars 21C and 31C and the fourth beam main bars 21D and 31D, the forces of the beam main bars 21A to 21D and 31A to 31D are applied to the column beam joint C1. Can be transmitted efficiently.

  Then, after the upper column 1 is formed, reinforcing steel plates 41 and 42 are provided at the column head position and the column leg position of the column beam joint C1 in the column 1. By providing the reinforcing steel plates 41 and 42, the concrete cone breakage at the column beam joint C1 is prevented.

  Thus, in the bar arrangement structure in the column beam joint C1 according to the present embodiment, the fixing lengths of the beam main bars 21A to 21D and 31A to 31D of the beams 2 and 3 facing each other are less than half of the width of the column 1. The beams 2 and 3 can be arranged at the same height position with no level difference. Further, the fixing length is less than half of the width of the column 1 and there is a concern that the beam main bars 21A to 21D and 31A to 31D may be pulled out. In this regard, in the present embodiment, fixing nuts 22 and 32 are provided at the distal ends of the beam main bars 21A to 21D and 31A to 31D. The fixing nuts 22 and 32 are fixed and fixed to the beam-to-column joint C1 after placing concrete on the beam-to-column joint C1, so that the fixing plates 23 and 33 provided at the tips of the fixing nuts 22 and 32 are fixed. Thus, the beam main bars 21A to 21D and 31A to 31D are prevented from being pulled out.

  In addition, the beams 2 and 3 according to the present embodiment are both made of precast, but can be constructed without passing the main beam between adjacent beams. Therefore, the construction of the beams 2 and 3 can be made very easy. Further, the fixing plates 23 and 33 for preventing the beam main bars 21A to 21D and 31A to 31D from being pulled out are formed on the heads of the fixing nuts 22 and 32, and the size thereof is small. Therefore, it is possible to sufficiently secure a bar arrangement space at the column beam joint C1 and promote a smooth operation.

  In the above embodiment, the fixing plates 23 and 33 provided on the heads of the fixing nuts 22 and 32 are used. However, other fixing plates can be used. For example, as shown in FIG. 3, the fixing plate 24 that connects the adjacent right beam main bars 21 </ b> A to 21 </ b> D in the right beam 2 can be provided. A plurality of holes into which the right beam main bars 21A to 21D can be inserted are formed in the fixing plate 24 so as to be spaced apart in the width direction, and the right beam main bars 21A to 21D are inserted into these holes, respectively. .

  Further, a fixing plate 34 for connecting the left beam main bars 31A to 31D adjacent to each other in the left beam 3 is also provided. The fixing plates 24 and 34 that fix the beam main bars 21A to 21D and 31A to 31D adjacent to each other in the beams 2 and 3 may be provided by the fixing plates 24 and 34, respectively.

  Furthermore, in place of the reinforcing bar 12, a perforated steel plate 25 shown in FIG. The perforated steel plate 25 has an outer shape that is substantially the same as the cross section of the column 1, and a hole is formed at a position where the column main reinforcement 11 in the column 1 is disposed. The column main reinforcing bars 11 can be reinforced by passing the column main reinforcing bars 11 through the holes of the perforated steel plate 25. Moreover, the perforated steel plate 25 and the reinforcing bar 12 can be used in combination. By providing such a perforated steel plate 25, the volume of the part that can be regarded as the column beam joint C1 is increased, so that the yield strength of the joint can be improved. Improvement in the yield strength of the joint can be achieved not only when the perforated steel plate 25 is provided, but also when the reinforcing bar 12 is provided.

  On the other hand, in the above embodiment, the beams 2 and 3 are arranged with no level difference, but as shown in FIG. 5, the beams 2 and 3 are formed with a slight level difference. You can also. In this aspect, the right beam 2 is disposed at a position slightly lower than the left beam 3. At this time, the right beam main bars 21A to 21D of the right beam 2 are arranged at positions slightly lower than the left beam main bars 31A to 31D of the left beam 3. Even in such a case, the beam main bars 21A to 21D and 31A to 31D of the beams 2 and 3 are arranged at positions where they do not interfere with each other, so that the level difference between the right beam 2 and the left beam 3 can be slightly shifted. it can.

  Further, in the beams 2 and 3 in the above-described embodiment, the beam main bars 21A to 21D and 31A to 31D are formed in two steps vertically, and a total of 16 beam main bars 21A to 21D are provided. However, as shown in FIG. The beams 2 and 3 having the beam main bars 21E, 21F, 31E and 31F in total of 8 beams can be used. In this case, the beams 2 and 3 can also be formed with a slight level difference. Moreover, it can also be set as the aspect without a level difference.

  As described above, when the beam main bars 21E, 21F, 31E, and 31F are arranged one step up and down, the stress transfer bars 13 are located outside the beam main bars 21E, 21F, 31E, and 31F at the column beam joint C1 (up and down). (Position) is preferable. By arranging the stress transmission bars 13 in this way, the forces of the beam main bars 21E, 21F, 31E, 31F can be efficiently transmitted to the beam-column joint C1.

  Next, a second embodiment of the present invention will be described. FIG. 7 is an elevational sectional view of a column beam joint having a reinforcing bar structure according to the second embodiment of the present invention, and FIG. 8 is a plan sectional view thereof.

  As shown in FIGS. 7 and 8, in the column beam joint C <b> 2 according to the present embodiment, the beams 2 and 3 are joined to the column 1 as in the first embodiment. Twelve column main bars 11 extending in the vertical direction are arranged on the column 1, and 16 beam main bars 21 and 31 extending in the horizontal direction are arranged on the beams 2 and 3, respectively.

  Reinforcing bars 12 are provided on the column main bars 11 in the column beam joint C2. In addition, a plurality of joint outer reinforcement bars 14 are provided at equal intervals in the vertical direction on the column main bars 11 at the vertical position in the column beam joint C2. Further, a plurality of outer joint reinforcement bars 26 and 36 are also provided at equal intervals in the left-right direction on the beam main bars 21A to 21D and 31A to 31D at the left and right positions in the column beam joint C2. Fixing nuts 22 and 32 similar to those in the first embodiment are provided at the distal ends of the beam main bars 21A to 21D and 31A to 31D.

  Moreover, the reinforcement beam 5 is provided in the column beam junction part C2 which concerns on this embodiment. The reinforcing hoop bar 5 includes an inner reinforcing hoop bar 51 having a circular shape when viewed in plan and an outer side reinforcing hoop bar 52 having a circular shape when viewed in plan. The outer reinforcement hoop muscle 52 has a larger diameter than the inner reinforcement hoop muscle 51, and both are arranged concentrically.

  Further, as shown in FIG. 7, between the first beam main bars 21A and 31A and the second beam main bars 21B and 31B in the beam main bars 21A to 21D and 31A to 31D of the beams 2 and 3, and the third beam main bars 21C, Inner reinforcing hoop bars 51 are provided between 31C and the fourth beam main bars 21D and 31D, respectively. In addition, an inner reinforcing hoop bar 51 and an outer reinforcing hoop bar 52 are provided above the first beam main bars 21A and 31A and below the fourth beam main bars 21D and 31D, respectively.

  In the bar arrangement structure according to this embodiment having the above-described configuration, the beam main bars 21A to 21D and 31A to 31D of the beams 2 and 3 facing each other are less than half the width of the column 1 as in the first embodiment. Since it is the fixing length, both do not interfere with each other. Therefore, the beams 2 and 3 facing each other can be arranged at the same height.

  Further, in the bar arrangement structure according to the present embodiment, the reinforcing hoop bars 5 are provided between the right beam main bars 21A to 21D and the left beam main bars 31A to 31D in the column beam joint C2. The reinforcing hoop bars 5 transmit the pulling force of the right beam main bars 21A to 21D to the left beam main bars 31A to 31D to prevent the left beam main bars 31A to 31D from being pulled out. Conversely, the pulling force of the left beam main bars 31A to 31D is transmitted to the right beam main bars 21A to 21D to prevent the right beam main bars 21A to 21D from being pulled out.

  As described above, by providing the reinforcing hoop bars 5, the right beam main bars 21A to 21D and the left beam main bars 31A to 31D prevent the other from being pulled out by the mutual pulling force. In this way, it is possible to prevent the beam main bars 21A to 21D and 31A to 31D from being pulled out.

  In the second embodiment, a circular hoop is used as the reinforcing hoop, but a substantially rectangular one can be used as the reinforcing hoop as shown in FIGS. In the column beam joint C2 in this aspect, the beams 2 and 3 are joined to the column 1. Twelve column main bars 11 extending in the vertical direction are arranged on the column 1, and 16 beam main bars 21 and 31 extending in the horizontal direction are arranged on the beams 2 and 3, respectively.

  Reinforcing bars 12 are provided on the column main bars 11 in the column beam joint C2. In addition, a plurality of joint outer reinforcement bars 14 are provided at equal intervals in the vertical direction on the column main bars 11 at the vertical position in the column beam joint C2. Further, a plurality of outer joint reinforcement bars 26 and 36 are also provided at equal intervals in the left-right direction on the beam main bars 21A to 21D and 31A to 31D at the left and right positions in the column beam joint C2. Fixing nuts 22 and 32 similar to those in the first embodiment are provided at the distal ends of the beam main bars 21A to 21D and 31A to 31D.

  The reinforcing hoop lines include first to third reinforcing hoop lines 53 to 55 that are installed in a substantially square shape in plan view. These reinforcement hoop muscles 53 to 55 have substantially the same installation shape, and the first reinforcement hoop muscle 53 and the second reinforcement hoop muscle 54 are arranged at the same level position. As shown in FIG. 9, these first reinforcing hoop bars 53 and second reinforcing hoop bars 54 are located above the first beam main bars 21A, 31A, below the second beam main bars 21B, 31B, and the third beam main bars. Arranged above 21C and 31C and below the fourth beam main bars 21D and 31D, respectively. The third reinforcing hoop bar 55 is located on the beam main bar side of the first and second reinforcing hoop bars 53 and 54, and between the first beam main bar 21A, 31A and the second beam main bar 21B, 31B. And the third beam main bars 21C, 31C and the fourth beam main bars 21D, 31D.

  Even when the reinforcing hoop bars 53 to 55 arranged in these positions are used, the pulling force of the right beam main bars 21A to 21D is applied to the left beam main bar 31A as in the second embodiment. To 31D to prevent the left beam main bars 31A to 31D from being pulled out. Conversely, the pulling force of the left beam main bars 31A to 31D is transmitted to the right beam main bars 21A to 21D to prevent the right beam main bars 21A to 21D from being pulled out.

  As described above, by providing the reinforcing hoop bars 53 to 55, the right beam main bars 21A to 21D and the left beam main bars 31A to 31D prevent the other from being pulled out by the mutual pulling force. In this way, it is possible to prevent the beam main bars 21A to 21D and 31A to 31D from being pulled out.

  In the second embodiment, the beam main bar is provided with 16 beam main bars. However, for example, the present invention can also be applied to a beam having eight beam main bars as shown in FIG. Of course, as shown in FIG. 5 and FIG. 6, it can also be used when the beams facing each other have a step.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, the number of column reinforcing bars and the number of beam main reinforcing bars are not limited to the above-described mode, and can be used for various numbers. In the second embodiment, the installation shape of the reinforcing hoop is circular or substantially square, but other shapes may be used.

  Moreover, it can also be set as the aspect which provided the reinforcement hoop reinforcement in said 1st embodiment. Furthermore, it can also be set as the aspect which provides a reinforced steel plate in said 2nd embodiment. Moreover, although the steel plate was used as a reinforcement board provided in the stigma and the column base, the thing of other materials, such as a fiber reinforced plastic, can also be used, for example.

  Furthermore, in the said embodiment, although the thing made from a precast is used as a beam, this invention is applicable also to the thing made from what is called a half precast, and what is constructed on the spot.

It is an elevation sectional view of a column beam junction which has a bar arrangement structure concerning a first embodiment. It is a plane sectional view of a column beam junction which has a bar arrangement structure concerning a first embodiment. It is a plane sectional view of the column beam junction which has a bar arrangement structure concerning the modification of a first embodiment. It is a top view of a perforated steel plate. It is an elevation sectional view of a column beam junction which has a bar arrangement structure concerning other modifications of a first embodiment. It is an elevation sectional view of a column beam junction which has a bar arrangement structure concerning other modifications of a first embodiment. It is an elevation sectional view of a column beam junction which has a bar arrangement structure concerning a second embodiment. It is a plane sectional view of a column beam junction which has a bar arrangement structure concerning a second embodiment. It is an elevation sectional view of a column beam junction which has a bar arrangement structure concerning a modification of a second embodiment. It is a plane sectional view of the beam-column joint part which has a bar arrangement structure concerning the modification of a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Column 2 ... Right beam 3 ... Left beam 5 ... Reinforcement hoop reinforcement 11 ... Column main reinforcement 12 ... Reinforcement reinforcement 13 ... Stress transmission reinforcement 14 ... Outer joint reinforcement reinforcement 21A ... (Right first) Beam reinforcement 21B ... (Right first) 2) Beam main bar 21C (right third) beam main bar 21D (right fourth) beam main bars 21E, 21F, 31E, 31F ... Beam main bars 22, 32 ... Fixing nuts 23, 33, 24, 34 ... Fixing plate 25 ... Perforated steel plates 26, 36 ... joint outer reinforcement bars 31A ... (left first) beam main bar 31B ... (left second) beam main bar 31C ... (left third) beam main bar 31D ... (left fourth) beam main bar 41, 42 ... Reinforced steel plate 51 ... Inner reinforcement hoop reinforcement 52 ... Outer reinforcement hoop reinforcement 53 ... First reinforcement hoop reinforcement 54 ... Second reinforcement hoop reinforcement 55 ... Third reinforcement hoop reinforcement C1, C2 ... Column beam joint

Claims (8)

In the bar arrangement in the reinforced concrete column-beam joint where the beam is joined to the column,
The fixing length of the beam reinforcing bar provided on the beam is less than half of the width of the column,
A reinforcing bar structure in a reinforced concrete column beam joint, wherein a reinforcing bar fixing tool is attached to the tip of the beam reinforcing bar.   The bar arrangement structure in the reinforced concrete column beam joint part according to claim 1, wherein the reinforcing bar fixing tool is a fixing plate. The beam is provided with a plurality of beam reinforcing bars adjacent to each other,
The bar arrangement structure in the reinforced concrete column beam connection part according to claim 1, wherein the reinforcing bar fixing tool is a fixing plate that connects the adjacent beam reinforcing bars.   The bar arrangement structure in the reinforced concrete column-beam joint part according to any one of claims 1 to 3, wherein beams are joined to the columns in the column-beam joint part from two directions facing each other. . In the bar arrangement in the reinforced concrete column-beam joint where the beam is joined to the column from two directions facing each other,
Reinforcement hoop reinforcement for transmitting stress generated by beam reinforcement provided in each of the beams facing each other to the beam reinforcement of the beams facing each other is provided.   The bar arrangement structure in the reinforced concrete column beam joint part according to claim 5, wherein an installation shape of the reinforcing hoop bars is substantially circular.   The bar arrangement structure in the reinforced concrete column beam connection part according to claim 5, wherein an installation shape of the reinforcing hoop bars is substantially square.   The reinforced concrete column beam joint part according to any one of claims 1 to 7, wherein a reinforcing plate is provided at a column head position or a column base position located in the vicinity of the column beam joint part. Reinforcement structure.

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