JP2009275467A - Steel pipe column and its bonding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weldless bonded steel pipe column having a slime structure without reducing space and exhibiting excellent structural performance and dismantling performance, and to provide a steel pipe column bonding method. <P>SOLUTION: The steel pipe column 100 configured by connecting an upper column section 10 to a lower column section 12 includes: a cross joint 16 that is provided to the lower end of the upper column section 10 and the upper end of the lower column section 12 respectively and includes: a plate having a cross shape seen in the column axial direction and extending in the cross axial direction; a joint panel 22 constituted of a plurality of circumferentially disposed steel plates 22a so as to surround the outer circumference of the joint part 20 formed by vertically abutting the cross joint 16 of the lower column section 12 on the cross joint 16 of the upper column section 10 and also constituted by bonding a plurality of steel plates 22a with bolts while bonding the cross joint 16 of the lower column section 12 to the cross joint 16 of the upper column section 10 with bolts; and mortar 26 filled between the joint part 20 and the joint panel 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a steel pipe column and a method for joining steel pipe columns.

  Conventionally, as shown in Fig. 7, erection pieces projecting on the outer peripheries of the lower and upper joint columns are connected with joint panels as a structure for joining the lower and upper joint columns of steel pipe columns in steel structures. A structure is known in which they are connected to each other and mortar is filled between a joint panel and a column (see, for example, Patent Document 1). According to this structure, the lower node column and the upper node column can be easily firmly joined without being welded.

JP 2007-39952 A

  By the way, the steel pipe column joining structure of the above-mentioned conventional patent document 1 has a problem that the inner space (the space outside the column) is compressed because the diameter of the joining portion increases by the amount of the erection piece. .

  In order to solve this problem, for example, as shown in FIG. 8, it is conceivable to eliminate the erection piece and reduce the diameter of the joint portion to a size that is slightly larger than the column diameter to make the joint detail slim. However, although such joining details satisfy the required performance in structural design, when disassembling, the outer steel pipe must be gas-cut, and it is difficult to cope with reuse of members. In addition, there is a problem in that it takes time to consider the curing of the column member during dismantling and the influence of heat input due to gas cutting.

  The present invention has been made in view of the above circumstances, and has a slim structure that does not compress a space, and provides a welded steel pipe column that is excellent in structural performance and dismantling performance, and a method for joining steel pipe columns. With the goal.

  In order to achieve the above object, a steel pipe column according to claim 1 of the present invention is a steel pipe column configured by joining an upper node column and a lower node column, and includes a lower end of the upper node column and the A cruciform joint formed by a plate extending in the column axis direction as viewed from the column axis direction, and a cruciform joint of the lower node column and the cruciform shape of the upper node column The cruciform joint of the lower joint column and the cruciform joint of the upper joint column, which are composed of a plurality of steel plates arranged in the circumferential direction so as to surround the outer periphery of the joint portion formed by abutting the joint vertically And a joint panel configured by bolting the plurality of steel plates to each other, and a hardened material filled between the joint portion and the joint panel. .

  The steel pipe pillar according to claim 2 of the present invention is the steel pipe pillar according to claim 1, wherein in the joint portion, the cross joint of the lower joint pillar and the cross joint of the upper joint pillar are splice plates. It is characterized by being bolted via.

  Moreover, the steel pipe pillar which concerns on Claim 3 of this invention has the steel plate respectively arrange | positioned between the plates mutually orthogonally crossed in the said joint panel in Claim 1 or Claim 2 mentioned above, Each steel plate is curved in a quadrant arc when viewed in the column axis direction, and is bolted to the cross joint plate of the upper joint column and the lower joint column via rib plates provided at both ends in the circumferential direction. It is characterized by being joined.

  A steel pipe column joining method according to claim 4 of the present invention is a steel pipe column joining method constituted by joining an upper node column and a lower node column, and includes a lower end of the upper node column and a lower side of the upper node column. At the upper end of the node column, a cross-shaped joint made of a plate extending in the column axis direction as viewed in the column axis direction is provided, respectively, and the cross-shaped joint of the lower node column and the cross of the upper node column A plurality of steel plates are arranged in a circumferential direction so as to surround an outer periphery of a joint portion formed by abutting the cruciform joint vertically, and the cruciform joint of the lower joint column and the cruciform joint of the upper joint column And a step of providing a joint panel by bolting the plurality of steel plates to each other, and a step of filling a hardener between the joint portion and the joint panel. And

  According to a fifth aspect of the present invention, there is provided a steel pipe column joining method according to the fourth aspect, wherein the cross joint of the lower joint column and the cross joint of the upper joint column are connected via a splice plate. The method further includes a step of bolting.

  Moreover, the method for joining steel pipe columns according to claim 6 of the present invention is the method according to claim 4 or 5, wherein the joint panel is curved in a quadrant arc shape when viewed in the column axis direction, and the circumferential direction thereof. The steel plate is provided with rib plates at both ends, the steel plates are respectively disposed between the plates of the cross joint orthogonal to each other, and the rib plates are used as the cross joint plates of the upper joint column and the lower joint column. The joint panel is provided by bolting.

  According to the present invention, it is not necessary to provide a protruding member such as an erection piece on the outer periphery of the joint portion of the steel pipe column, and the structure can be made slim, so that the space (internal space) on the outer peripheral side of the column is not compressed. In addition, the upper and lower joint columns and the joint panel are respectively joined by bolts, and at the same time, the gap between the upper and lower joint columns and the joint panel is filled with a hardening material. For this reason, the stress transmission state in the joint part of the steel pipe column can be made a relatively advantageous state, and the rigid joint of the steel pipe column can be realized with a relatively small number of actual bolts. Furthermore, since it is a bolt joint, the steel pipe column can be easily disassembled without requiring gas cutting, and it is possible to cope with the reuse of members.

  Exemplary embodiments of a steel pipe column and a method for joining steel pipe columns according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic front sectional view of a steel pipe column according to the present invention, FIG. 2 is a schematic plan sectional view, FIG. 3 is an exploded front sectional view, and FIG.

  As shown in FIGS. 1, 2, 3 and 4, a steel pipe column 100 according to the present invention includes an upper node column 10 and a lower node column 12 as a circular steel pipe. A cruciform joint 16 is attached to each end of the upper joint column 10 and the lower joint column 12 via a disc-shaped end plate 14. The cruciform joint 16 includes a joining plate 15 extending in the column axis direction assembled in a cross shape when viewed in the column axis direction. The steel pipe column 100 of the present invention includes a joint panel 22 that surrounds a joint portion 20 (joint portion) formed by bolting the joint plates 15 of the upper and lower joint columns 10 and 12 via a splice plate 18, and upper and lower It further includes a mortar 26 as a hardening material filled in the gap 24 between the node columns 10 and 12 and the joint panel 22. In this embodiment, mortar is used as the curing material, but concrete, epoxy resin, or the like may be used as other materials.

  The joint panel 22 is composed of an outer steel pipe for enclosing the outer periphery of the joint portion 20. This outer steel pipe is composed of four steel plates that are curved in a quadrant arc when viewed in the column axis direction, in which a steel pipe having a diameter smaller than that of the upper and lower node columns 10 and 12 is divided into four in the circumferential direction. A rib plate 28 for bolt joining is attached to the periphery of each steel plate 22a. In addition, a mortar injection hole (not shown) is provided in a part of the joint panel 22, and the mortar 26 is injected from the injection hole into the gap 24 between the joint panel 22 and the upper and lower node columns 10 and 12. Has been enabled. Further, the length in the column axis direction of the joint panel 22 is a length corresponding to a section sandwiched between the end plates 14 of the joint portion 20.

Next, the construction procedure of the steel pipe column 100 according to the present invention will be described with reference to FIG. FIG. 5 is a diagram showing an example of a construction procedure by the method for joining the steel pipe columns 100 according to the present invention.
As shown in FIG. 5A, first, the plates 15 of the cruciform joints 16 of the upper and lower joint columns 10 and 12 are joined together with bolts 30 via the splice plate 18, and the columns are positioned and built. Tighten this.

  Next, as shown in FIG. 5 (b), four quadrant arc-shaped steel plates 22a are connected between the plates 15 orthogonal to each other as viewed in the column axis direction of the joint portion 20 via rib plates 28 at both ends. Install each and tighten the bolts. By doing so, the joint panel 22 composed of the four steel plates 22 a is attached so as to surround the outer periphery of the joint portion 20.

  Finally, as shown in FIG. 5 (c), the mortar 26 is filled in the gap 24 between the joint panel 22 and each plate 15 of the joint portion 20, and the steel pipe column 100 of the present invention is completed by waiting for hardening. To do. In this case, since the end plate 14 is provided at the upper and lower end portions of the joint portion 20, there is an effect that the mortar placing form which is necessary for the details of FIGS. 7 and 8 is not required.

Next, the disassembly procedure of the steel pipe column 100 according to the present invention will be described.
First, the bolt 30 of the rib plate 28 of each steel plate 22a constituting the joint panel 22 is removed, and the joint panel 22 is removed. Next, the filled mortar 26 is crushed. Finally, the bolt 30 of the splice plate 18 that joins the cruciform joints 16 of the upper and lower joint pillars 10 and 12 is removed, and the upper and lower joint pillars 10 and 12 are separated to complete the disassembly work.

  Next, a stress transmission mechanism in the joint portion of the steel pipe column 100 according to the present invention will be described with reference to FIG. FIG. 6 is a schematic front sectional view for explaining a stress transmission mechanism of a steel pipe column according to the present invention. FIG. 6 (a) relates to a stress transmission mechanism for a long-term load, and FIG. 6 (b) relates to a stress transmission mechanism for a short-term load. Is.

  As shown in FIG. 6A, the long-term load N such as the upper load is mainly transmitted by the frictional force of the bolt 30 of the bolt joint of the splice plate 18 and the rib plate 28 at the joint 20 of the steel pipe column 100. .

  On the other hand, as shown in FIG. 6B, the short-term load Q due to a roll earthquake or a typhoon is a bolted joint between the splice plate 18 and the rib plate 28 and a joint plate 15 of the cross joint 16 extending in the direction perpendicular to the load. Is transmitted by the leverage reaction force received from the mortar 26. In this steel pipe column 100, when it is designed considering only the bolt joint for short-term load, the number of necessary bolts increases, which is not realistic. However, by performing a design that takes into account the lever reaction force with the mortar 26, it is possible to realize a rigid joint of the steel pipe columns with a realistic number of bolts. The joint design formula in this case can be established by applying the known joint design formula of FIG.

  In the above embodiment, a steel pipe column made of a circular steel pipe has been described as an example. However, a steel pipe column made of a square steel pipe may be used, and even in this case, the same effect as the present invention can be achieved. Further, instead of using a quadrant arc steel plate as a steel plate constituting the joint panel, a steel plate or a flat steel plate having a substantially L-shaped cross section in a column axial direction view may be used. An effect can be produced.

  As described above, according to the present invention, since it is not necessary to provide a protruding member such as an erection piece on the outer periphery of the joint portion of the steel pipe column, the structure can be made slim, so that the space (internal space) on the outer periphery side of the column can be reduced. There is no pressure. In addition, the upper and lower joint columns and the joint panel are respectively joined by bolts, and at the same time, the gap between the upper and lower joint columns and the joint panel is filled with a hardening material. For this reason, the stress transmission state in the joint part of the steel pipe column can be made a relatively advantageous state, and the rigid joint of the steel pipe column can be realized with a relatively small number of actual bolts. Furthermore, since it is a bolt joint, the steel pipe column can be easily disassembled without requiring gas cutting, and it is possible to cope with the reuse of members.

It is a schematic front sectional view showing an example of a steel pipe column according to the present invention. It is a schematic plane sectional view showing an example of a steel pipe pillar concerning the present invention. It is an exploded front sectional view showing an example of a steel pipe pillar concerning the present invention. It is a decomposition plane sectional view showing an example of a steel pipe pillar concerning the present invention. It is a figure which shows an example of the construction procedure by the joining method of the steel pipe pillar which concerns on this invention. It is a schematic front sectional drawing explaining the stress transmission mechanism of the steel pipe column concerning the present invention. It is a schematic perspective view which shows an example of the joining detail of the conventional steel pipe column. It is a schematic perspective view which shows an example of the steel pipe column of the slimming joining detail.

Explanation of symbols

10 Upper joint column 12 Lower joint column 14 End plate 16 Cross joint 18 Splice plate 20 Joint (joint)
22 Joint panel 22a Steel plate 24 Crevice 26 Mortar (hardening material)
28 Rib plate 30 Bolt 100 Steel pipe column

Claims (6)

It is a steel pipe column constructed by joining an upper node column and a lower node column,
A cruciform joint comprising a plate that is provided at a lower end of the upper joint column and an upper end of the lower joint column, and that has a cross shape in the column axis direction and extends in the column axis direction;
It is composed of a plurality of steel plates arranged in a circumferential direction so as to surround an outer periphery of a joint portion formed by vertically butting the cruciform joint of the lower joint pillar and the cruciform joint of the upper joint pillar, A joint panel configured by bolting the plurality of steel plates to each other while bolting the cross joint of the lower joint and the cross joint of the upper joint;
A steel pipe column comprising a hardener filled between the joint portion and the joint panel.   2. The steel pipe column according to claim 1, wherein in the joint portion, the cross joint of the lower joint column and the cross joint of the upper joint column are bolted together via a splice plate. The joint panel includes steel plates respectively disposed between mutually orthogonal plates of the cruciform joint,
Each steel plate is curved in a quadrant arc when viewed in the column axis direction, and is bolted to the cross joint plate of the upper joint column and the lower joint column via rib plates provided at both ends in the circumferential direction. The steel pipe column according to claim 1 or 2, wherein the steel pipe column is joined. A method of joining steel pipe columns configured by joining upper and lower joint columns,
At the lower end of the upper joint column and the upper end of the lower joint column, a cross-shaped joint made of a plate extending in the column shape and the column axis direction as viewed in the column axis direction is provided, respectively.
A plurality of steel plates are arranged in a circumferential direction so as to surround an outer periphery of a joint portion formed by vertically butting the cruciform joint of the lower joint pillar and the cruciform joint of the upper joint pillar, and the lower joint Providing a joint panel by bolting the plurality of steel plates to each other while bolting the cross joint of the columns and the cross joint of the upper joint pillar;
And a step of filling a hardening material between the joint portion and the joint panel.   The method of joining steel pipe columns according to claim 4, further comprising a step of bolting the cross joint of the lower joint column and the cross joint of the upper joint column via a splice plate. The joint panel is formed of a steel plate that is curved in a quadrant arc when viewed in the column axis direction, and has rib plates at both circumferential ends thereof.
The steel plate is disposed between the plates of the cruciform joint orthogonal to each other, and the rib plate is bolted to the plates of the cruciform joint of the upper joint column and the lower joint column to provide the joint panel. The method for joining steel pipe columns according to claim 4 or claim 5, wherein: