JP4657967B2 - Column / beam joint structure of H-shaped steel column - Google Patents

Description

  The present invention adopts H-shaped steel columns even when H-shaped steel beams are joined in an oblique direction in addition to the vertical and horizontal directions, so that these beams do not cause harmful deformation in the columns. The present invention relates to a column / beam joint structure of an H-shaped steel column that can be rigidly joined.

Patent Document 1 is known as a structure using H-shaped steel as a column. FIG. 12 of Patent Document 1 shows a state in which a beam of H-shaped steel is joined to an H-shaped steel column from three directions in the vertical and horizontal directions and an oblique direction sandwiched between them. Specifically, the longitudinal beam is joined to the front and back of the column web, the transverse beam is joined to the column flange, and the oblique beam is joined between the column flange and the web.
JP-A-1-203540

  The H-shaped steel has a strong axis direction along the web and a weak axis direction along the flange. When the beam is attached to the H-shaped steel column from the vertical and horizontal directions, the H-shaped steel column is used when the beam only needs to be joined in the weak axis direction. This is because if a beam is rigidly connected in the weak axis direction, a moment acts, which is not preferable. When beams must be rigidly connected in both the vertical and horizontal directions, it is common to use steel pipes as columns. However, the use of steel pipes increases costs. Furthermore, in the case of a H-shaped steel column, when a beam is attached from an oblique direction in addition to the vertical and horizontal directions, the connection of the oblique beam becomes a connection to the periphery of the flange end of the column, and the structure becomes more complicated. At the same time, stress transmission is complicated, and deformation occurs in the torsional direction of the column. Therefore, even when the beam is joined to the H-shaped steel column from an oblique direction, pin connection is forced, resulting in the beam becoming rigid. There is a problem that it will be necessary.

  The present invention was devised in view of the above-described conventional problems, and in addition to the vertical and horizontal directions, even when the H-shaped steel beam is joined from an oblique direction, an H-shaped steel column is adopted, An object of the present invention is to provide a column / beam joint structure of an H-shaped steel column capable of rigidly joining these beams so that no harmful deformation occurs in the columns.

  The column / beam joint structure of the H-shaped steel column according to the present invention is the column / beam of the H-shaped steel column to which the H-shaped steel beam is joined from the X direction, the Y direction, and the oblique direction sandwiched between the X and Y directions. It is a joint structure, and a diaphragm is joined to each of the lower column upper end and upper column lower end, and a web stiffener and a flange stiffener are fitted between these diaphragms in accordance with the web position and flange position of the upper and lower columns, respectively. And connecting the upper and lower flanges of each beam to each of the diaphragms, bonding the X-direction beam web to the web stiffener, bonding the Y-direction beam web to the flange stiffener, The flange stiffener is joined to the oblique beam web, and the oblique stiffener is joined to the flange stiffener. To construct a box shape including a Ebusutifuna, said along the flange stiffener web direction of the column between, characterized in that joining the pair of component forces stiffener joined to the beam web front and back surfaces of the X-direction.

  The flange stiffener to which the oblique beam web is joined is formed wider than the flange of the column.

  The beam ends of all the beams are set to the same height, and the beam ends of these beams are joined to the upper and lower sets of diaphragms.

  In the column / beam joint structure of the H-shaped steel column according to the present invention, the H-shaped steel column is adopted even when the H-shaped steel beam is joined from an oblique direction in addition to the vertical and horizontal directions. Thus, these beams can be rigidly bonded so that no harmful deformation occurs in the columns.

  Hereinafter, a preferred embodiment of a column / beam joint structure of an H-shaped steel column according to the present invention will be described in detail with reference to the accompanying drawings. The column / beam joint structure of the H-shaped steel column according to the present embodiment can be applied to an S-structured ramen frame building, and basically, as shown in FIGS. The column / beam joint structure of the H-shaped steel column 4 to which the H-shaped steel beams 1, 2 and 3 are respectively joined from the direction and the oblique direction sandwiched between the X and Y directions, the upper end of the lower column 4a and the upper Diaphragms 6 and 7 are joined to the lower ends of the pillars 4b, and a web stiffener 8 and a flange stiffener 9 are arranged between the diaphragms 6 and 7 so as to match the web 4w position and the flange 4f position of the upper and lower pillars 4a and 4b, respectively. The upper and lower flanges 1fa, 1fb, 2fa, 2fb, 3fa, 3fb of the beams 1, 2 and 3 are joined to the diaphragms 6 and 7, respectively, and the web stiffener 8 is joined to the beam web 1w in the X direction. The flange stiffener 9 is joined to the flange stiffener 9 by joining the beam web 2w in the Y direction and joining the oblique beam web 3w to the end of the flange stiffener 9 and joining the oblique beam web 3w. In order to form a box shape including the web stiffener 8, a pair of segments joined along the web direction of the column 4 between the flange stiffeners 9, in other words, along the web stiffener 8, to the front and back of the beam web 1 w in the X direction. The force stiffener 10 is joined.

  In the present embodiment, the left and right directions (X direction) and the front-rear direction (Y direction) orthogonal to each other, and the direction of 45 ° diagonally between the X direction and the Y direction (oblique direction) ) In which the H-shaped steel beams 1, 2, 3 from the eight directions are respectively joined. The column / beam joint 5 of the H-shaped steel column 4 is set between the lower column 4a made of H-shaped steel on the lower floor and the upper column 4b made of H-shaped steel on the upper floor. In the present embodiment, the beam ends of all the beams 1, 2, 3 are set to be the same. The diaphragms 6 and 7 are made of steel plates, and are provided in pairs of upper and lower plates. The diaphragms 6 and 7 have a planar outer contour formed in an octagon shape so as to correspond to the eight beams 1, 2 and 3 joined from eight directions. These diaphragms 6 and 7 are in contact with the lower surface of the lower diaphragm 6 disposed on the lower side at the upper end portion of the lower column 4a and the upper surface of the upper diaphragm 7 disposed on the upper side with the lower end portion of the upper column 4b. Joined by welding. Thereby, these diaphragms 6 and 7 are made into a diaphragm type.

  The web stiffener 8 is made of a steel plate, and is provided between the diaphragms 6 and 7 in accordance with the web 4w positions of the upper and lower pillars 4a and 4b. The flange stiffener 9 is also made of a steel plate, and a pair of flange stiffeners 9 are provided between the diaphragms 6 and 7 in accordance with the positions of the flanges 4f of the upper and lower pillars 4a and 4b. The web stiffener 8 and the flange stiffener 9 are an assembly (built H) 11 that is assembled into a H-shaped section by integrally welding and joining the center of the pair of flange stiffeners 9 to both ends of the web stiffener 8. . The thickness of each steel plate of the assembly 11 is preferably set to be equal to or greater than the thickness of the flange 4f and the web 4w of the upper and lower pillars 4a and 4b. Instead of such an assembly 11, H-shaped steel may be employed.

  The assembly 11 is disposed between the upper and lower diaphragms 6 and 7 in an upright position. The upper and lower ends of the web stiffener 8 are joined to the upper surface of the lower diaphragm 6 and the lower surface of the upper diaphragm 7 by welding, respectively. The upper and lower ends of the flange stiffener 9 are also joined to the upper surface of the lower diaphragm 6 and the lower surface of the upper diaphragm 7 by welding, respectively. As a welding method, fillet welding, partial penetration welding, and butt welding are available, but when the above-described assembly 11 and the upper and lower diaphragms 6 and 7 are joined, butt welding is most preferable. In the illustrated example, the web 4w dimension of the upper pillar 4b is set to be shorter than the web 4w dimension of the lower pillar 4a, and the web stiffener 8 matches the web 4w dimension of the upper and lower pillars 4a and 4b. Thus, the width is narrowed from the lower end toward the upper end. Accordingly, the pair of flange stiffeners 9 are disposed in a slightly inclined state so that the distance from the lower diaphragm 6 toward the upper diaphragm 7 gradually decreases. When the dimensions of the web 4w of the upper and lower pillars 4a and 4b are the same, the web stiffener 8 has a constant width from the upper end to the lower end, and the flange stiffener 9 is arranged in an upright state.

  Further, the width dimension W of the flange stiffener 9 may be the same as the flange width of the upper column 4a or the lower column 4b, but it is bonded to a beam web 3w of an oblique beam 3 described later, or to a component force stiffener 10. In order to secure a margin for the above, it is preferable that the flange width of the upper column 4a and the lower column 4b is set to be somewhat wider. As a result, the upper column 4b and the lower column 4a are successively arranged in the height direction through the web stiffener 8 and the flange stiffener 9 sandwiched between the upper and lower diaphragms 6 and 7 in the column / beam joint portion 5. Connected.

  Upper and lower flanges 1fa, 1fb, 2fa, 2fb, 3fa, and 3fb of the beam ends of the beams 1, 2, and 3 are joined to the upper and lower diaphragms 6 and 7, respectively, by welding. Specifically, the upper and lower flanges 1fa, 1fb, 2fa, 2fb, 3fa, 3fb of the beam ends of the beams 1, 2, 3 are connected to the beam webs 1w, 2w, 3w, the web stiffener 8 and the flange stiffener 9, respectively. In order to insert between the upper and lower diaphragms 6 and 7 to be joined, the upper and lower flanges 1fa, 1fb, which are cut out from the beam webs 1w, 2w, 3w with a length corresponding to the insertion allowance and formed by cutting. The cut ends of 2fa, 2fb, 3fa, and 3fb are joined to the sides of the octagonal diaphragms 6 and 7, respectively. The dimensions of the sides of the diaphragms 6 and 7 are set wider than the width dimensions of the upper and lower flanges 1fa, 1fb, 2fa, 2fb, 3fa, and 3fb of the beams 1, 2, and 3 in order to allow flexibility in connection. The

  Of the beams 1, 2, 3 thus joined to the upper and lower diaphragms 6, 7, the beam webs 1 w of the pair of X-directional beams 1 are the lower surface of the upper diaphragm 7, the upper surface of the lower diaphragm 6, and Further, the front and back surfaces of the web stiffener 8 are joined by welding. The joining position of the X-direction beam 1 to the web stiffener 8 of the beam web 1w is set so as to be continuous with each other with the web stiffener 8 interposed therebetween. The beam web 2w of the pair of Y-direction beams 2 is welded to the lower surface of the upper diaphragm 7 and the upper surface of the lower diaphragm 6, and also the surface of the flange stiffener 9, that is, the side opposite to the side to which the web stiffener 8 is joined. Be joined. The joining positions of the beam webs 2w of these Y-direction beams 2 with respect to the respective flange stiffeners 9 are set so as to be continuous with each other including the web stiffener 8. Accordingly, the beam webs 1w and 2w of the X and Y direction beams 1 and 2 are configured to cross in a cross shape at the column / beam joint portion 5 including the web stiffener 8.

  Further, with respect to the beam web 3w of the diagonal beam 3 from four directions, two diagonal beams 3 sandwiching one of the Y-direction beams 2 are made into one set, and the beam web of the pair of diagonal beams 3 is set. 3 w is joined to the surface of the common flange stiffener 9 by welding so as to sandwich the beam web 2 w of the Y-direction beam 2. The beam webs 3w of the diagonal beams 3 are also joined to the lower surface of the upper diaphragm 7 and the upper surface of the lower diaphragm 6 by welding.

  The component force stiffeners 10 are paired along the web direction of the upper and lower pillars 4a and 4b with the beam web 1w of the X-direction beam 1 joined to the web stiffener 8 interposed between the pair of flange stiffeners 9. Arranged. These component force stiffeners 10 are formed such that the width dimension of the flange stiffener 9 gradually decreases from the lower side toward the upper side in response to the distance between the lower diaphragm 6 and the upper diaphragm 7 gradually decreasing. . These component force stiffeners 10 are made of a steel plate, and upper and lower edges thereof are joined to the lower surface of the upper diaphragm 7 and the upper surface of the lower diaphragm 6 by welding. One of the right and left end edges is on the back surface of each flange stiffener 9 on the side opposite to the side to which the beam web 3w of the oblique beam 3 is joined, and the other is the surface of the beam web 1w of the X direction beam 1. Both are joined to the back surface by welding. The joint positions of these component force stiffeners 10 are continuous in a straight line with the beam web 1w of the X direction beam 1 interposed therebetween, and coincide with the joint positions of the beam web 3w of the oblique beam 3 in each flange stiffener 9. Is set. Welding methods include fillet welding, partial penetration welding, and butt welding, but upper and lower diaphragms 6 and 7 and upper and lower flanges 1fa, 1fb, 2fa, and 2fb of the beam ends of beams 1, 2, and 3 are used. , 3fa, 3fb are preferably joined by butt welding or fillet welding.

  Accordingly, each of the oblique beams 3 has a box shape with a rectangular cross section constituted by a pair of flange stiffeners 9, a web stiffener 8, and a pair of component force stiffeners 10. It is joined to a rigid portion 12 in which a Y-direction beam 2 is joined to an X-direction beam 1 and a flange stiffener 9.

  The operation of the column / beam joint structure of the H-shaped steel column according to this embodiment will be described. In construction, the lower diaphragm 6 is joined on the lower column 4a, and then the web stiffener is placed on the lower diaphragm 6. 8 and flange stiffener 9 assembly 11, then each beam 1, 2, 3 is joined to assembly 11, component force stiffener 10 is joined, and then upper diaphragm 7 is joined thereon. Thus, the column / beam joint 5 is constructed, and then the upper column 4b is joined onto the upper diaphragm 7.

Regarding the transmission of the acting stress due to the moment, shearing force and axial force from the column 4 and the beams 1, 2, 3 in the column / beam joint 5 configured in this way, the rigid portion 12 for the Y-direction beam 2. In particular, the moment can be borne by the flange stiffener 9 joined to the web stiffener 8. Also, the moment can be applied to the X-directional beam 1 by the component force stiffener 10 or the web stiffener 8 in the rigid portion 12. Thereby, the X and Y direction beams 1 and 2 can be rigidly joined to the column / beam joint 5 of the H-shaped steel column 4. Further, with respect to the oblique beam 3, as shown in the figure, the reaction force moment M ′ due to the moment M acting on the oblique beam 3 is applied to the X-direction beam via the flange stiffener 9, the web stiffener 8 and the component force stiffener 10. direction and Y-direction beam direction moment M _'x, M' is dispersed as _y, the flanges stiffener 9, the moment M _'x, M' _y dispersed by web stiffener 8 and the component force stiffener 10, X-direction beam 1 And the moments M ′ _x1 and M ′ _y1 acting on the Y-direction beam 2 respectively, so that even in the column / beam joint 5 to which the diagonal beam 3 is joined, these diagonal beams 3 can be rigidly joined.

  As described above, in the column / beam joint structure of the H-shaped steel column according to the present embodiment, the diaphragms 6 and 7 are joined to the upper end of the lower column 4a and the lower end of the upper column 4b, respectively. A web stiffener 8 and a flange stiffener 9 are provided between the upper and lower pillars 4a and 4b so as to correspond to the positions of the web 4w and the flange 4f, respectively, and are joined to each other. , 2, 3, the upper and lower flanges 1 fa, 1 fb, 2 fa, 2 fb, 3 fa, 3 fb are joined, the web stiffener 8 is joined to the beam web 1 w of the X direction beam 1, and the flange stiffener 9 is joined to the Y direction beam 2. The beam web 2w of the diagonal beam 3 is bonded to the flange stiffener 9 and the beam web 3w of the diagonal beam 3 is bonded to the flange stiffener 9. In order to form a box shape including the flange stiffener 9 and the web stiffener 8, a pair of component force stiffeners 10 joined to the front and back of the beam web 1 w of the X-direction beam 1 along the web direction of the column 4 between the flange stiffeners 9. Since the X / Y direction beams 1 and 2 can be rigidly connected to the column / beam joint 5 using the component force stiffener 10, the web stiffener 8 and By the action of the component force stiffener 10 on the flange stiffener 9, the acting stress acting on the oblique beam 3 can be rationally distributed to the X and Y beams 1, 2, etc., and can be borne. It can be rigidly joined to the mouth 5.

  As a result, when the diagonal beam 3 is simply rigidly connected to the column 4, the torsional stress and the harmful deformation associated therewith are caused to the column 4 and the X / Y direction beams 1 and 2 due to the moment input from the diagonal beam 3. It can be prevented from occurring. Moreover, since it can join rigidly, the size of each beam 1,2,3 can be designed small.

  In addition, because the structure can be rigidly connected by simply adding the component force stiffener 10, the structure of the column / beam joint 5 can be prevented from becoming complicated. Moreover, since it can construct | assemble on the basis of H-shaped steel, a cost increase can be prevented compared with the case where a steel pipe is employ | adopted. Further, since the flange stiffener 9 to which the beam web 3w of the oblique beam 3 is joined is formed wider than the flange 4f of the upper and lower columns 4a and 4b, the beam web 3w of the oblique beam 3 is easily joined. be able to. Furthermore, the beam ends of all the beams 1, 2 and 3 are set to the same height, and the beam ends of these beams 1, 2 and 3 are joined to a pair of upper and lower diaphragms 6 and 7. By doing so, it is possible to further prevent the column / beam joint structure from becoming complicated.

  4 to 6 show modifications of the above embodiment. FIG. 4 shows a case where the oblique beam 3 is joined from two directions. In this case, the upper and lower diaphragms 6 and 7 are formed in a hexagonal shape, and the flange stiffener 9 to which the oblique beam 3 is not joined does not need to secure a margin for joining with the component force stiffener 10. What is necessary is just to set more than the flange width of the upper and lower pillars 4a and 4b. FIG. 5 shows a case where the diagonal beam 3 is joined from one direction, and shows the basic structure of the configuration of the present invention. In this case, the upper and lower diaphragms 6 and 7 are formed in a pentagonal shape, and a pair of component force stiffeners 10 are provided on one side of the web stiffener 8 where the oblique beam 3 to be joined is located.

  FIG. 6 is a view corresponding to FIG. 2 when the haunch portion 13 is formed by the built-in H at the beam end portion. In the case where the beams are different from each other, by providing the hunch 13, the lower flange 3 fa can be joined to the common lower diaphragm 6 even if the beam is low, and the column / beam joint is provided. The structure of the part 5 can be simplified. On the other hand, for example, when the beams of the oblique beam 3 are different from the beams of the X and Y beams 1, 2, the lower diaphragm 6 is arranged on the lower column 4a in two upper and lower stages. The lower flanges 1fa, 1fb, 2fa, 2fb, 3fa, 3fb of the Y direction beams 1 and 2 and the oblique direction beam 3 may be individually joined to the lower diaphragm 6. In the said embodiment, although all the joining locations were demonstrated as welding joining, you may make it join by bolt joining. Although not shown, the form of the column / beam joint 5 at the outer periphery of the building, that is, the X-directional beam 1 and the Y-directional beam 2 that are not arranged to sandwich the diagonal beam 3 in FIGS. The case where no is provided is also included in the present invention.

It is a plane sectional view showing one suitable embodiment of the pillar and beam joint part structure of the H type steel pillar concerning the present invention. In FIG. 1, it is an AA arrow directional cross-sectional view. 1. It is a BB arrow directional cross-sectional view in FIG. It is a plane sectional view showing a modification of a pillar / beam joint structure of the H-shaped steel pillar shown in FIG. FIG. 7 is a plan sectional view showing another modification of the column / beam joint structure of the H-shaped steel column shown in FIG. 1. It is sectional drawing corresponding to FIG. 2 which shows the other modification of the pillar and beam joint part structure of the H-shaped steel pillar shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 X direction beam 2 Y direction beam 3 Diagonal direction beam 4 H-shaped steel column 4a Lower column 4b Upper column 5 Column / beam joint 6 Lower diaphragm 7 Upper diaphragm 8 Web stiffener 9 Flange stiffener 10 Component stiffener

Claims (3)

A column / beam joint structure of an H-shaped steel column to which an H-shaped steel beam is joined from an oblique direction sandwiched between an X direction, a Y direction, and an X / Y direction,
Join the diaphragm to each of the lower column upper end and upper column lower end,
Between these diaphragms, a web stiffener and a flange stiffener are provided in accordance with the web position and flange position of the upper and lower pillars, respectively.
Join the upper and lower flanges of each beam to each of the diaphragms,
Join the beam stiffener in the X direction,
Join the beam web in the Y direction to the flange stiffener,
While joining the beam web in the diagonal direction to the flange stiffener,
In order to form a box shape including the flange stiffener and the web stiffener to which the oblique beam web is joined, the X-direction beam web is joined to the front and back of the column along the web direction of the column between the flange stiffeners. A column / beam joint structure of an H-shaped steel column characterized by joining a pair of component force stiffeners.   The column / beam joint structure of an H-shaped steel column according to claim 1, wherein the flange stiffener to which the oblique beam web is joined is formed wider than the flange of the column.   The H-section steel according to claim 1 or 2, wherein the beam ends of all the beam ends are set to the same height, and the beam end portions of the beams are joined to the pair of upper and lower diaphragms. Column / beam joint structure of the column.

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