JP5909117B2 - Column and beam joint structure - Google Patents

Description

  The present invention relates to a column-to-beam joint structure for joining beams having different heights to a square steel pipe column having a curved surface portion at a corner portion.

  Conventionally, in a structure using a rectangular steel pipe column, a beam made of H-shaped steel may be joined. When joining a column and a beam, it is necessary to efficiently transmit the stress from the beam to the column at the joint. For this purpose, a through diaphragm is formed according to the height of the flange of the beam. There is a need. The through diaphragm is a plate-like member joined between the pillars by welding or the like. When the through diaphragm is used, the flange portion of the beam is abutted and welded on the side surface of the through diaphragm.

  However, the size (height) of the beam joined to the column may not be the same in all directions. For example, a beam having a low height may be joined only in one direction. In such a case, at least one of the upper and lower flange portions of the beam cannot be joined to the through diaphragm to which the other beam is joined.

  As a column beam joining structure for joining beams having different heights, a square cross-section tube, a cross plate supporting two parallel sides of the square cross-section tube, and a corner portion of the square cross-section tube 2 are sandwiched between them. The end of the beam-to-column fitting that is integrally formed by casting with the diagonal plate that supports the sides, and at least the range to which the beam is attached on the outer peripheral surface is formed by welding to a column made of a square cross-section tube. In addition, there is a column beam connection structure in which a beam made of H-shaped steel is bonded to the outer peripheral surface of the column beam connection hardware by non-scallop welding (Patent Document 1).

JP 2001-329613 A

  However, as in Patent Document 1, the work of providing the inner diaphragm inside the column has a problem that the amount of welding is large and workability is poor. Further, in the structure described in Patent Document 1, it is necessary to integrally form the beam-column joint, which increases the mass of the hardware and increases the cost. However, in order to provide a through diaphragm for each beam having a different height, it is necessary to cut a column and sandwich the diaphragm with a diaphragm so as to be joined.

  On the other hand, when the column is a square steel pipe column, the column is manufactured by bending a steel plate, so that a curved surface portion is formed at the corner. Therefore, for example, when the beam is decentered with respect to the column and the bonding is performed so that the side surface of the column is aligned with the side surface of the beam, the beam needs to be bonded to the curved surface portion of the column. However, since a gap is formed between the beam and the curved surface portion, it is necessary to form a diaphragm through the portion in order to efficiently transmit the stress from the beam to the column. However, as described above, it is not desirable to arrange the through diaphragm for each beam height because it requires man-hours.

  The present invention has been made in view of such problems, and when joining beams of different heights to a square steel pipe column, the work can be performed only outside the column with a simple structure without providing a through diaphragm or the like. An object is to provide a possible column-to-beam joint structure.

  In order to achieve the above-described object, the first invention is a junction structure of a column and a beam, which is perpendicular to the width direction along the thickness direction of the main body portion and the width direction end portion of the main body portion. A reinforcing member having a convex portion protruding in one direction, a column having a substantially rectangular cross-sectional shape and a corner portion formed of a curved surface portion; and a first beam joined to the column. In addition, at least one flange portion of the first beam is joined to the outer surface of the column, and at least one end portion in the width direction protrudes from the curved surface portion of the column. At the height of one flange portion of the beam, the reinforcing member is inserted into the gap between the curved surface portion and one flange portion of the first beam, and the reinforcing member is connected to the column and the first One flange portion of the first beam and the column are joined to the beam of the first beam via the reinforcing member. Stress transfer is bonded structure between columns and beams, characterized in that it is carried out between the. A pair of diaphragms formed on the pillars; and a second beam joined to the pillars in a direction different from that of the first beams, and each flange portion joined to the upper and lower diaphragms. The other flange portion of the first beam is preferably joined to one of the diaphragms.

  A column joint surface to be joined to the column, and a beam installation surface that is a surface substantially perpendicular to the column joint surface, and the column joint surface has a notch for preventing interference with the diaphragm. A joining member formed over the width direction of the main body and provided with a concave portion having a depth of half or more of the thickness of the main body on the column joint surface side is further used. One flange portion and the other of the first beam The column joining surface of the joining member is joined to the outer surface side of the column between the diaphragm and the other diaphragm portion of the first beam and the other diaphragm via the joining member. It is desirable that the stress transmission is performed.

  The width of the first beam may be narrower than the width of the column, and the first beam may be joined eccentrically to the column in the width direction.

  It is desirable that the side surface shape of the convex portion of the reinforcing member has a concave curved surface portion that substantially corresponds to the shape of the curved surface portion, and the radius of curvature of the concave curved surface portion is smaller than the radius of curvature of the curved surface portion.

  The length of the reinforcing member is preferably ½ or less of the width of the column.

  According to the first aspect of the present invention, it is possible to obtain a joint structure between a column and a beam that can efficiently transmit stress from the beam to the column even for a column having a curved surface portion at the corner. . Specifically, when a beam having a height different from that of other beams is joined to the column, even if a part of the beam protrudes to the curved surface portion of the column, a reinforcing member having a convex portion is used. By arranging and joining the part in the gap between the column and the beam in the curved surface part, the stress from the beam to the column in the part can be efficiently transmitted.

  Moreover, since the stress from the beam to the column can be efficiently transmitted by using the column joining member, it is not necessary to provide an inner diaphragm. In addition, this joining member has a recess formed on the side of the joining surface to be joined to the column, and since the depth of the recess is more than half of the thickness of the main body, weight reduction can be achieved without having excessive strength. it can. For example, when a force is applied in a direction in which the beam is separated from the column, the column bears a tensile force and the joining member bears a compressive force. At this time, the compressive force applied to the joining member is handled by the outer side from the center of the thickness of the joining member.

  That is, with respect to the direction of the force from the beam described above, the inner side from the center of the thickness of the joining member does not bear the compressive force, and the tensile force is handled by the column. It is unnecessary. Therefore, it is possible to achieve both high strength and light weight by forming a recess in this part.

  Such a configuration is particularly effective when the beam is narrower than the column and arranged eccentrically in the width direction with respect to the column.

  Further, the side surface shape of the convex portion is a concave curved surface portion substantially corresponding to the shape of the curved surface portion at the corner of the column, and the radius of curvature of the concave curved surface portion is made smaller than the radius of curvature of the curved surface portion of the column, thereby reinforcing the member Does not lift from the joint surface of the pillars.

  Further, by setting the length of the reinforcing member to ½ or less of the width of the column, the side surfaces of the column are substantially the same height, and two reinforcing members can be used side by side in the width direction at the same time. Therefore, even if each beam joined to the opposite surface of the column is eccentric in one direction and protrudes from the curved surface portion, a reinforcing member should be used for each beam. Can do.

  According to the present invention, when joining beams of different heights to a square steel pipe column, a column-to-beam junction structure capable of working only with the outside of the column with a simple structure without providing a through diaphragm or the like. Can be provided.

The perspective view which shows the junction structure 1 of a column and a beam. It is a figure which shows the reinforcement member 13, (a) is a perspective view, (b) is a top view. (A) is sectional drawing which shows the junction structure 1 of a pillar and a beam, and is the sectional view on the AA line of FIG. 1, (b) is the C section enlarged view of (a). It is a perspective view which shows the beam joining member 17, (a) is a top perspective view, (b) is a bottom perspective view. It is sectional drawing which shows the junction structure 1 of a pillar and a beam, and is the BB sectional view of FIG. (A) is sectional drawing which shows the joining structure 1 of a pillar and a beam, The DD sectional view (b) of FIG. 1 is the EE sectional view taken on the line (a). The figure which shows the reinforcement members 13a and 13b.

  Hereinafter, a column-to-beam joint structure 1 according to an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a pillar-to-beam joint structure 1. The column-to-beam joint structure 1 is a structure in which a plurality of beams 9a and 9b are joined to a column 5 having a curved surface portion 7 at a corner.

  The column 5 is a hollow rectangular steel tube column, and the beams 9a and 9b are H-shaped steel. The beam 9a and the beam 9b have different beam heights. 1 shows an example in which the beam 9a is formed in one direction of the column 5 and the beam 9b is formed in one direction adjacent thereto, but the present invention is not limited to this, and a plurality of beams 9b are formed. It may be provided in the direction.

  A pair of diaphragms 3 a and 3 b are joined to the column 5. The diaphragms 3 a and 3 b are through-diaphragms that protrude outward from the column 5. The diaphragms 3a and 3b are provided above and below the pillar 5 with a predetermined interval.

  The ends of the upper and lower flange portions of the beam 9a are joined to the diaphragms 3a and 3b by welding, respectively. That is, the installation interval of the diaphragms 3a and 3b coincides with the flange portion interval of the beam 9a. Therefore, the stress from the beam 9a can be reliably transmitted to the column.

  The end of the flange portion 11a above the beam 9b is joined to the upper diaphragm 3a by welding. Since the beam 9b is lower than the beam 9a, a gap is generated between the flange portion 11b below the beam 9b and the diaphragm 3b.

  A beam joining member 17 is joined between the diaphragm 3b and the flange portion 11b of the beam 9b. That is, the flange portion 11 b of the beam 9 b and the column 5 are joined via the beam joining member 17. Therefore, the stress from the beam 9b can be reliably transmitted to the column. Details of the beam joining member 17 will be described later. Further, instead of the beam joining member 17, an inner diaphragm may be used.

  The beam 9 b is joined to a position that is eccentric with respect to the width direction of the column 5. That is, the width of the beam 9b is narrower than the width of the column 5 and the beam 9b is joined to the end of the column 5 so that the side surface of the column 5 and the side surface of the beam 9b coincide. The reinforcing member 13 is joined to the joint portion between the beam 9b and the column 5 and at a height corresponding to the curved surface portion 7. The reinforcing member 13 is a surface perpendicular to the bonding direction with the beam 9b and is bonded to the side surface of the column 5 on the eccentric direction side of the beam 9b.

  2A and 2B are views showing the reinforcing member 13, in which FIG. 2A is a perspective view and FIG. 2B is a plan view. The reinforcing member 13 includes a main body portion 14 that is a substantially rectangular parallelepiped and a convex portion 15. The reinforcing member 13 is a steel material having excellent weldability, for example. In addition, in the figure, although the main-body part 14 is shown by a rectangular parallelepiped, you may form a groove | channel etc. with respect to the welding part mentioned later.

  At one end in the width direction of the main body portion 14 (left and right direction in FIG. 2B), it is perpendicular to the width direction along the thickness direction of the main body portion 14 (up and down direction in FIG. 2A). Protruding portions 15 that protrude in one direction are provided. A concave curved surface portion 16 having an arc shape is formed on the inner surface side of the convex portion 15. That is, the width of the convex portion 15 becomes narrower as it goes to the tip, and becomes wider as it goes to the root portion.

  3A is a cross-sectional view taken along the line AA in FIG. 1, and is a horizontal cross-sectional view of the column-to-beam joint structure 1 in the portion of the reinforcing member 13. FIG. Moreover, FIG.3 (b) is the C section enlarged view of Fig.3 (a). As described above, the curved surface portion 7 is formed at the corner portion of the column 5. Further, the beam 9b is decentered in the width direction of the column 5 so that one side surface (lower side in the drawing) of the column 5 and one side surface (lower side in the drawing) of the beam 9b (flange portion 11b) coincide with each other. Then, the end of the beam 9b (flange portion 11b) is disposed so as to protrude on the curved surface portion 7. That is, a gap is formed between the beam 9b (flange portion 11b) and the column 5 (curved surface portion 7).

  The main body portion 14 of the reinforcing member 13 is joined to the side surface of the column 5 in a direction perpendicular to the joining direction of the beam 9b and on the eccentric direction of the beam 9b (the beam 9b protrudes from the curved surface portion 7). At this time, the convex portion 15 is inserted into the gap between the curved surface portion 7 and the beam 9b (flange portion 11b). That is, the reinforcing member 13 is arranged so that the end surface of the reinforcing member 13 coincides with the side surface of the column 5 (the side surface to which the beam 9b is joined). The main body portion 14 of the reinforcing member 13 is welded to the column 5 and the welding portion 21.

  The inner surface side of the convex portion 15 is disposed so as to face the curved surface portion 7. Here, the concave curved surface portion 16 on the inner surface side of the convex portion 15 has a shape corresponding to the curved surface portion 7, and the curvature radius R 1 (FIG. 2B) is the curvature radius R 2 ( It is set slightly smaller than that in FIG. This is because when R1 is larger than R2, the tip of the convex portion 15 does not come into contact with the column 5. The convex portion 15 and the beam 9b, and the beam 9b and the column 5 are welded by the welding portion 21. That is, the reinforcing member 13, the column 5, and the beam 9b are welded respectively. A slight gap may be formed between the concave curved surface portion 16 and the curved surface portion 7. Moreover, in order to show the appropriate welding allowance with the pillar 5 and the beam 9b, you may form the taper part etc. which show a welding part in the main-body part 14 grade | etc.,.

  The width W (FIG. 2B) of the reinforcing member 13 is ½ or less of the entire width of the column 5. By doing in this way, a pair of reinforcement member 13 can be joined to the same side at the same height. For example, in FIG. 3A, when the beam 9b is joined symmetrically to the right side of the column 5 similarly to the left side, the reinforcing members 13 need to be joined in pairs toward both the left and right sides. In this case, the reinforcing members 13 do not interfere with each other if the width W of the reinforcing members 13 is ½ or less of the total width of the pillars 5.

  Next, the beam joining member 17 will be described. 4A and 4B are perspective views showing the beam joining member 17, in which FIG. 4A is a top perspective view and FIG. 4B is a bottom perspective view. The beam bonding member 17 has a column bonding surface 24 on the bottom side and a beam installation surface 26 on one side. That is, the column joining surface 24 and the beam installation surface 26 are formed substantially perpendicularly.

  The column bonding surface 24 is a part bonded to the surface of the column. A recess 25 is formed in the column bonding surface 24. The depth of the concave portion 25 is desirably a depth that is half or more of the thickness of the main body of the beam joining member 17.

  Further, the notch 19 is formed in the column bonding surface 24 in the width direction. The notch 19 is for avoiding interference with the diaphragm. In the vicinity of the notch 19, the recess 25 is provided with a rib 27 in the width direction as necessary. The end surface of the rib 27 may be flush with the column bonding surface 24, or the height of the rib 27 may be lower than the depth of the recess 25. The rib 27 reinforces the beam joining member by preventing deformation of the beam joining member.

  Tapered portions 23 are provided at the edges of the beam connecting members 17 with the column connecting surfaces on both sides. The taper portion 23 indicates a welding allowance between the beam joining member 17 and the column 5. This is because if the welding allowance is too small, the welding strength cannot be ensured, and if the welding allowance is too large, the distortion of the beam joining member and the like becomes large and excessive cost is required. Therefore, the taper part 23 for showing an appropriate welding allowance is formed.

  The beam joining member 17 is formed so that the thickness is the largest in the notch portion 19 and gradually decreases toward both ends. The shape of the beam joining member 17 is not limited to the illustrated example, and the shape of the recess 25 and the outer shape of the beam joining member 17 are appropriately set as long as the configuration described above is provided.

  FIG. 5 is a diagram showing the column-to-beam joint structure 1 and is a cross-sectional view taken along the line BB in FIG. Similarly, FIG. 6A is a cross-sectional view taken along the line DD of FIG.

  As shown in FIG. 5, the beam joining member 17 is joined to the column 5 so that the upper surface (beam installation surface 26) is in contact with the lower surface of the flange portion 11b of the beam 9b. That is, the beam joining member 17 is fixed so as to fill a space between the upper surface of the protruding portion of the diaphragm 3b that is a through diaphragm and the lower surface of the beam 9b.

  A notch portion 19 is formed at a portion corresponding to the joint portion of the beam joining member 17 with the diaphragm 3b. For this reason, the beam joining member 17 and the diaphragm 3b do not interfere with each other. The lower end of the beam joining member 17 is located below the diaphragm 3b. That is, the beam joining member 17 is joined to the outer peripheral surface of the column 5 across the diaphragm 3b.

  The beam joining member 17 and the column 5 are joined by the welded portion 29 (FIG. 6A) in the tapered portion 23 described above. The contact surface between the lower surface of the flange portion 11b of the beam 9b and the beam installation surface 26 is not necessarily welded. In this case, the lower surface of the flange portion 11b and the beam installation surface 26 may not be in contact with each other. Good.

  In FIG. 5, the flange portion 11 a above the beam 9 b and the contact portion of the diaphragm 3 a are welded, and the contact portion between the web portion of the beam 9 b and the end of the flange portion 11 b and the outer peripheral surface of the column 5 is welded. However, the contact portion between the beam connecting member 17 and the column 5 and the diaphragm 3b may be welded. However, the beam connecting member 17 may be welded to the outer peripheral surface of the column 5, and the beam connecting member 17 and the diaphragm 3b are connected to each other. Does not necessarily need to be welded. In this case, the notch 19 may be enlarged and a gap may be formed between the beam joining member 17 and the diaphragm 3b.

  In addition, as shown in FIG. 5, the extension part of the diaphragm 3b to which the beam joining member 17 is joined (when the beam joining member 17 is joined to the vertical column, the extension part in the direction orthogonal thereto) and the beam joining. Assuming that the thickness of the beam joining member 17 at the intersection with the member 17 (the thickness at the bottom of the concave portion 25 at the part) is T, T is set to be larger than the thickness t of the column 5. That is, the depth of the concave portion 25 is set to be a depth that is half or more of the entire thickness of the main body of the beam joining member 17 and T is larger than t.

  In this manner, by providing the beam joining member 17 between the diaphragm 3b and the beam 9b, the downward stress from the beam 9b, the moment starting from the joint with the diaphragm 3a, and the like can be reliably applied to the column 5. Can communicate.

  FIG.6 (b) is the EE sectional view taken on the line of Fig.6 (a). As described above, the beam joining member 17 is welded to the column 5 at the tapered portion 23. In this state, when a force is applied from the beam to the column, the force is also applied to the beam joining member 17.

  For example, in FIG. 5, it is assumed that a force is applied in a direction in which the beam 9b is separated from the column 5 (right direction in the drawing). In this case, as shown in FIG. 6B, a force in the tensile direction is applied to the inner side (G in the drawing) from the center (F in the drawing) in the thickness direction of the column 5 and the beam joining member 17. . Further, a compressive force is applied to the outer side (H in the figure) than the center (F in the figure) in the thickness direction of the beam joining member 17.

  In this case, since the column 5 can handle the tensile force, excessive strength is not required on the inner side G of the center F of the beam joining member 17. On the other hand, on the outer side H from the center F of the beam joining member 17, since only the beam joining member 17 takes a compressive force, high strength is required.

  In the beam joining member 17 according to the present invention, the portion (H) where high strength is required is made thick, and the portion (G) where strength is not needed is formed with a recess 25 to make the thickness thin. . That is, in a state where the column 5 is bonded, the thickness of the portion far from the bonding surface of the column 5 is increased, so that the reinforcement can be efficiently performed and the weight reduction can be achieved by the recess 25. In particular, the proof strength in the out-of-plane direction of the reinforced column can be improved by increasing the thickness of the portion far from the column.

  The beam joining member 17 does not need to be installed at the lower part of the beam 9b, and may be provided at the upper part. In this case, the beam 9b and the beam joining member 17 may be joined in a state where the top and bottom of FIGS. In this case, the bottom plate of the beam joining member 17 and the contact surface of the beam 9b need to be joined by welding or the like.

  As described above, according to the present embodiment, when the beam 9b is joined to the column 5 in which the curved surface portion 7 is formed at the corner, a part of the beam 9b protrudes from the curved surface portion 7 of the column 5. Even in this case, the stress from the beam 9b can be efficiently transmitted to the column 5. Therefore, even when the width of the beam 9b is narrower than the width of the column 5 and the beam 9b is arranged eccentrically with respect to the column 5 in the width direction, the beam 9b and the column 5 Stress transmission can be ensured.

  Further, by making the curvature radius R1 of the concave curved surface portion 16 on the inner surface of the convex portion 15 smaller than the curvature radius of the curved surface portion 7 of the column 5, the tip of the convex portion 15 does not float from the joint surface of the column 5. . Further, by setting the width W of the reinforcing member 13 to ½ or less of the entire width of the column 5, even if the two reinforcing members 13 are arranged in the width direction at the same height on the side surface of the column 5, They do not interfere with each other.

  Moreover, by using the beam joining member 17, the stress from the beam 9b to the column 5 can be efficiently transmitted without using an inner diaphragm. Therefore, the stress from the beam 9b can be reliably transmitted to the column 5 with a simple structure. Moreover, since the recessed part 25 is formed in the column joining surface side, it is lightweight, and since the thickness of the site | part which needs an especially strength is thick, it can reinforce efficiently.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, in the reinforcing member 13, the inner surface of the convex portion 15 is the concave curved surface portion 16, but the portion may not necessarily be a curved surface. For example, as shown in the reinforcing member 13a shown in FIG. 7A, the inner surface of the convex portion 15 may be a concave surface portion 16a formed by connecting a plurality of straight lines. Also in this case, the concave surface portion 16a may be prevented from interfering with the curved surface portion 7 when the reinforcing member 13a is joined to the column 5.

  Moreover, as shown in the reinforcing member 13b shown in FIG. 7B, the inner surface of the convex portion 15 may be tapered. In this case as well, when the reinforcing member 13 b is joined to the column 5, it is only necessary that the tapered portion does not interfere with the curved surface portion 7.

  Further, in the above-described example, the example using the diaphragms 3a and 3b which are through diaphragms has been described. However, the reinforcing member 13 and the like of the present invention can also be applied to a column-beam joint structure using an inner diaphragm. it can. In other words, the present reinforcing member can be applied if the beam is joined so that the end portion protrudes from a column constituted by a curved portion at the corner portion.

DESCRIPTION OF SYMBOLS 1 ......... Joint structure 3a, 3b of a pillar and beam ......... Diaphragm 5 ......... Column 9a, 9b ......... Beam 11a, 11b ......... Flange part 13, 13a, 13b ......... Reinforcing member 14 ... ... body 15 ... ... convex 16 ... ... concave curved surface 16a ... ... concave surface 17 ... ... beam joining member 19 ... ... notch 21 ... ... weld 23 ... ... taper 24 ... ··· Column connection surface 25 ·········································································

Claims (6)

It is a joint structure between a column and a beam,
Using a reinforcing member having a main body part and a convex part protruding in one of the directions perpendicular to the width direction along the thickness direction of the end part in the width direction of the main body part,
A column whose cross-sectional outer shape is substantially rectangular and whose corners are curved surfaces;
A first beam joined to the column;
Comprising
At least one flange portion of the first beam is joined to the outer surface of the column, and at least one end portion in the width direction protrudes from the curved surface portion of the column,
In the height of one flange portion of the first beam, the reinforcing member is inserted into the gap between the curved surface portion and one flange portion of the first beam. And joined to the first beam,
A structure for joining a column and a beam, wherein stress is transmitted between one flange portion of the first beam and the column via the reinforcing member. A pair of diaphragms formed on the pillars;
A second beam having a height different from that of the first beam, joined to the column in a direction different from the first beam, and each flange portion joined to the upper and lower diaphragms;
Further comprising
The column-to-beam joint structure according to claim 1, wherein the other flange portion of the first beam is joined to one of the diaphragms. A column joint surface to be joined to the column, and a beam installation surface that is a surface substantially perpendicular to the column joint surface, and the column joint surface has a notch for preventing interference with the diaphragm. It is formed over the width direction of the main body, and on the column joint surface side, further using a joining member provided with a recess having a depth of more than half the thickness of the main body,
The column joining surface of the joining member is joined to the outer surface side of the pillar between one flange portion of the first beam and the other diaphragm, and the first beam of the first beam is joined via the joining member. 3. The column / beam joint structure according to claim 2, wherein stress transmission is performed between the other flange portion and the other diaphragm. The width of the first beam is narrower than the width of the column,
The said 1st beam is eccentrically joined to the said column in the width direction, The junction structure of the column and beam in any one of Claims 1-3 characterized by the above-mentioned.   The inner surface shape of the convex portion of the reinforcing member has a concave curved surface portion substantially corresponding to the shape of the curved surface portion, and the curvature radius of the concave curved surface portion is smaller than the curvature radius of the curved surface portion. The column-to-beam junction structure according to any one of claims 1 to 4.   The length of the said reinforcement member is 1/2 or less of the width | variety of the said pillar, The junction structure of the pillar and beam in any one of Claims 1-5 characterized by the above-mentioned.

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