JP2005023774A - Buckling restraint member for vibration control and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily manufacturable, inexpensive, and compact buckling restraint member for vibration control and to provide its manufacturing method. <P>SOLUTION: An external pipe 2 in the buckling restraint member 1 for vibration control is divided to form a plurality of semicylindrical divided bodies 4, a steel-made central shaft force member 3 passes through the semicylindrical divided bodies 4, then the plurality of semicylindrical divided bodies 4 are joined to constitute the external pipe 2, and filler 7 which is solidified as time elapses is filled into the external pipe 2. The plurality of semicylindrical divided bodies 4 are arranged and the external pipe 2 constituted by joining them is arranged on an outer side in an intermediate part of the steel-made central shaft force member 3 provided with an adhesion prevention coating 8. Outside diameter d3 in the radial direction of the external pipe 2 is set to be smaller than outside diameter D3 in a mounting part 9 in both end parts of the steel-made central shaft force member 3. The filler 7 which is solidified as time elapses is filled/solidified in the external pipe 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibration-damping buckling restraining member used as a structural element that resists horizontal force such as seismic force or wind force in a building or other structure, and a manufacturing method thereof.

  Conventionally, as shown in FIGS. 4 and 5, since the steel pipe constituting the outer pipe 2 in the buckling restraining member 1 for vibration suppression is an integral one, the thickness of the steel central axial force member 3 is the outer pipe. 2 or less (for example, refer to Patent Document 1). Further, since the outer tube 2 is arranged so as to be covered from the end of the steel central axial force member 3 on the side of the mounting portion, the inner diameter D1 of the outer tube 2 is equal to or larger than the outer diameter D of the mounting portion. Needed dimensions. The central portion having a small cross-sectional area of the steel central axial force member 3 is a portion that absorbs energy by plasticizing this portion when receiving a compressive force, etc. In order to restrain buckling of this portion. The outer tube 2 having a large inner diameter is not necessary as in the prior art, and it has been desired to reduce the size. However, as described above, the buckling restraining member 1 for vibration suppression is provided due to manufacturing restrictions. In the case of manufacturing, the manufacturing freedom was low and the size was large.

  Conventionally, a buckling-restrained brace is also known in which a brace core material is sandwiched between a pair of steel materials in which concrete is preliminarily filled in a grooved steel material (see Patent Document 2).

As described above, when a brace core is placed between precast steel / concrete steel composite material in which concrete is pre-filled and solidified into grooved steel, the surface smoothness of the concrete or the surface of the grout on the concrete In order to increase the smoothness, high accuracy is required and a high level of skill is required, and it is difficult for the brace core material and the concrete to adhere to each other through an anti-adhesion coating made of an unbonding agent on the brace core material. There is.
Utility Model Registration No. 2533935 JP 2002-167863 A

  The present invention is not subject to manufacturing restrictions limited by member dimensions as in the prior art, and manufacturing without requiring high smoothness on the concrete surface, such as precast steel / concrete members. An object of the present invention is to provide an easy, inexpensive and small buckling restraining member for vibration suppression and a method for manufacturing the same.

  In order to advantageously solve the above-described conventional problems, the present invention is configured as follows.

  1st invention divides | segments the outer tube | pipe in a buckling restraining member, it is set as a some semi-cylinder division body, and after passing a steel center axial force member through a semi-cylindrical division body, these some semi-cylinder division | segmentation A body is joined to form an outer tube, and the outer tube is filled with a solidifying filling material over time.

  According to a second invention, in the first invention, the outer diameter of the outer tube joined with the plurality of semi-cylindrical divided bodies is made smaller than the outer diameter of the attachment portions at both ends of the steel central axial force member. It is characterized by being.

  A third invention is characterized in that, in the first or second invention, the temporally solidifying filling material is mortar or concrete.

  A fourth invention is characterized in that, in the first or second invention, the temporally solidifying filling material is lightweight mortar or lightweight concrete obtained by mixing mortar or concrete with a heat insulating lightweight aggregate of synthetic resin. .

  A fifth invention is characterized in that, in the fourth invention, the synthetic resin-based heat insulating lightweight aggregate is foamed polystyrene.

  A sixth invention is characterized in that, in the first to fifth inventions, the fluidized solidifying filling material in a fluid state is filled into a space in the outer tube joined with a semi-cylindrical divided body and solidified.

  A seventh invention is the first to fifth inventions, in which the fluidized solidifying filling material with time is filled in the recesses of the two semi-cylindrical divided bodies and solidified, and then between the semi-cylindrical divided bodies. The steel axial force member is sandwiched, and both the semi-cylindrical divided bodies are integrated by welding or a joint fitting.

  An eighth invention is characterized in that, in the first to seventh inventions, a steel central axial force member is previously provided with an adhesion preventing coating.

  According to a ninth aspect of the invention, an outer tube configured by arranging and joining a plurality of semi-cylindrical divided bodies is arranged outside the intermediate portion of the steel central axial force member provided with the adhesion preventing coating, and The outer diameter in the radial direction of the outer tube is set to be smaller than the outer diameter of the mounting portion at both ends of the steel central axial force member, and the outer tube is filled with a solidifying filling material made of mortar or concrete. It is characterized by being solidified.

  According to a tenth aspect of the present invention, an outer tube configured by arranging and joining a plurality of semi-cylindrical divided bodies is disposed outside an intermediate portion of a steel central axial force member provided with an adhesion preventing coating, and The outer diameter of the outer pipe in the radial direction is set smaller than the outer diameter of the mounting portion at both ends of the steel central axial force member, and in the outer pipe, mortar or concrete is a synthetic resin-based lightweight lightweight aggregate. It is characterized in that it is configured by filling and solidifying a temporally solidifying filling material made of a light weight mortar or light weight concrete.

  According to an eleventh aspect of the invention, an outer tube configured by arranging and joining a plurality of semi-cylindrical divided bodies is disposed outside the intermediate portion of the steel central axial force member provided with the adhesion preventing coating, and The outer diameter in the radial direction of the outer tube is set to be smaller than the outer diameter of the mounting portion at both ends of the steel central axial force member, and a synthetic resin such as mortar or concrete foam polystyrene is mixed in the outer tube. It is characterized by being filled with lightweight mortar or lightweight concrete.

  According to the present invention, the vibration control is not subject to manufacturing restrictions that are limited by member dimensions as in the prior art, and high smoothness is not required for the concrete surface like precast steel and concrete. The buckling restraining member can be easily manufactured at a low cost and can be reduced in size.

  The cross-sectional dimensions of the outer tube can be made reasonably small, and it is possible to easily achieve a sufficient contact between the steel central axial force member and the solidifying filling material over time through the anti-adhesion coating. It is easy to control the film thickness. In addition, as described above, when it becomes a small vibration-damping buckling restraining member, it is possible to reduce the wall thickness dimension of the building in which the brace of the present invention is inserted, because the space between the pillars or beams of the building or structure is good. The dead space can be reduced and the indoor space can be increased.

  By configuring the solidifying filler material over time with lightweight concrete or lightweight filler made by mixing synthetic resin-based heat insulating lightweight aggregate with concrete, the buckling restraining member for vibration damping is reduced in weight, This facilitates handling and improves workability, and contributes to weight reduction of the structural frame.

  Next, the present invention will be described in detail based on the illustrated embodiment.

  1 and 2 show the manufacturing procedure of the vibration-damping buckling restraining member of the present invention, and FIG. 3 shows the manufactured vibration-damping buckling restraining member 1, which is first shown in FIG. The outer tube 2 in the vibration-damping buckling restraining member 1 is configured by combining a pair of semi-cylindrical divided bodies 4 having a square groove shape (in the case of illustration) or a semicircular cross section. The semi-cylindrical divided body 4 may use a steel material having a groove-shaped cross section, or may be formed by cutting a steel pipe having a rectangular or circular cross section.

  As described above, the outer tube 2 in the vibration-damping buckling restraining member 1 is divided into a plurality of semi-cylindrical divided bodies 4 having both side plates 5 and connecting plates 6 for connecting them, and steel. The manufactured center axial force member 3 is passed through the semi-cylindrical divided body 4, and the semi-cylindrical divided body 4 is positioned at an intermediate portion in the axial direction of the central axial force member 3, and as shown in FIG. The end portions of the side plates 5 of the semi-cylindrical divided body 4 are joined together by welding W (in the case of illustration) or the like to form the outer tube 2, or appropriately joined via a joining plate to constitute the outer tube 2. A split-type lid (not shown) is disposed at the lower end of the outer tube 2, and the outer tube 2 is filled with the solidifying filling material 7 with time and cured, and the split-type lid is removed as necessary. As shown in FIG. 3, the vibration-damping buckling restraining member 1 is manufactured.

  In the case where the intermediate portion of the steel central axial force member 1 is plasticized, it is preferable that an adhesion preventing coating 8 is provided in advance in order to reduce the close contact with the steel central axial force member 1. Before the solidifying filling material 7 is filled, it is necessary that the anti-adhesion coating 8 is applied and formed on the intermediate portion of the steel central axial force member 3. As a material for forming the adhesion preventing coating 8, other materials such as rubber asphalt, butyl rubber, and urethane resin can be used according to the type of the solidifying filler 7 with time.

  The temporal solidification filling material 7 can be composed of lightweight mortar or lightweight concrete obtained by mixing mortar, concrete, mortar, or concrete with a synthetic resin-based heat insulating lightweight aggregate.

  Of the solidifying filling material 7 with time, mortar and concrete are general materials. Moreover, in lightweight concrete, as a lightweight aggregate mixed with mortar or concrete, there is a synthetic resin-based heat-insulating lightweight lightweight particle having a special surface processed and good kneadability with mortar and cement milk. As a specific example of the light-weight particles, as shown in FIG. 3 (c), it is composed of foamed polystyrene beads 12 formed by coating a plurality of internally-fired polystyrene cells 10 with a four-layer coat 11. Some have a surface treatment layer 13 applied for the purpose of imparting affinity with milk and water-reducing properties. The light-weight particles (beads 12) have, for example, the characteristics of particle size: 0.5 mmφ to 2.8 mmφ (92% or more), water absorption rate: 0, thermal conductivity: 0.03 kcal / mh ° C. Excellent in lightness, heat insulation, non-water absorption, workability, etc.

  The characteristics of the lightweight filler are as follows: (1) The lightweight particles are closed cells, thereby being excellent in thermal insulation and stable in quality (specific gravity, strength, thermal insulation). (2) Non-water-absorbing, thereby stable quality (specific gravity, strength, heat insulation), ultra-lightweight concrete is possible, pumping property is excellent, quality material age change is small, shrinkage cracks, It has characteristics such as excellent freeze-thaw resistance. (3) Since it is an elastic body (it does not compress and break), it has characteristics such as stable quality (specific gravity, strength, heat insulation) and excellent pumping characteristics, and it is much more on-site construction management than other lightweight concrete. Easy quality control.

  As another means for filling the outer tube 2 with lightweight mortar or lightweight concrete, before joining the two semi-cylindrical divided bodies 4, end portions of the semi-cylindrical divided bodies 4 are covered with a cover plate (not shown). Closed to form recesses on the inside thereof, fluidized lightweight mortar or lightweight concrete urethane is stored in the recesses on the inner side of each semi-cylindrical divided body 4 and cured and molded. Thereafter, the steel central axial force member 3 is sandwiched between two semi-cylindrical divided bodies 4 filled with the lightweight mortar or lightweight concrete, and the ends of the semi-cylindrical divided bodies 4 are joined together by welding W. The outer tube 2 may be configured. In this case, the two semi-cylindrical divided bodies 4 may be joined and integrated with a fastening band or other joint fitting instead of the weld W.

  A lightweight mortar or lightweight concrete solidifying filler 7 with time can be used in the same manner as described above. That is, fluidized lightweight mortar or lightweight concrete is filled and solidified in the space in the outer tube 2 formed by joining the two semi-cylindrical divided bodies 4 or flows into the recesses of the two semi-cylindrical divided bodies 4. In addition to filling and solidifying a lightweight mortar or light concrete, a steel central axial force member 3 may be sandwiched and the ends of the semi-cylindrical divided bodies 4 may be joined and integrated by any joining means.

  The film thickness of the anti-adhesion coating 8 provided on the steel central axial force member 3 varies depending on the material of the anti-adhesion coating when filling the solidifying filling material 7 with time. Since it is only necessary to apply a thick coating, it is easy to control the film thickness of the anti-adhesion coating 8, and the adhesion between the anti-adhesion coating 8 and the solidifying filling material 7 is high. Also, the close contact between the steel central axial force member 3 and the steel central axial force member 3 can be increased.

  When carrying out the present invention, the outer diameter d3 of the outer tube 2 joined with a plurality of semi-cylindrical divided bodies 4 is that of the attachment portion 9 provided with bolt holes or the like at both ends of the steel central axial force member 3. If the outer diameter dimension D3 is set to be smaller than the outer diameter dimension D3, the outer diameter dimension of the cross section of the intermediate portion of the damping buckling restraining member 1 can be reduced, and the damping buckling restraining member 1 can be made small and inexpensive. Since it can be set as the buckling restraining member 1 for vibration suppression, it is preferable. For example, in FIG. 3 (b), the vertical dimension and the horizontal dimension of the outer tube cross section where the semi-cylindrical divided bodies 4 are joined together may be reduced. The vertical dimension or the horizontal dimension Of these, only one dimension may be made smaller than the outer diameter dimension D3 of the attachment portions 9 at both ends of the steel central axial force member 1.

  As shown in the embodiment shown in FIG. 3, a plurality of semi-cylindrical divided bodies 4 are arranged and joined to the outside of the intermediate portion of the steel central axial force member 3 provided with the adhesion prevention coating 8. The outer pipe 2 is arranged, and the outer diameter dimension d3 of the outer pipe 2 in the radial direction is set smaller than the outer diameter dimension D3 of the attachment portion 9 at both ends of the steel central axial force member 3, and the outer pipe 2 is a buckling restraining member 1 for vibration damping constructed by filling and solidifying the solidifying filling material 7 with time, the cross-sectional dimension d3 in the intermediate portion of the buckling restraining member 1 for damping is attached to both ends. It is reasonably smaller than the outer diameter D3 of the portion 9, the cross-sectional dimension of the outer tube 2 is reduced, the amount of material can be reduced, and the filling amount of the solidifying and filling material 7 to be filled and solidified is also reduced. Thus, an inexpensive vibration-damping buckling restraining member 1 can be obtained.

  As in the above-described embodiment, in the present invention, the outer tube 2 is divided into two parts, so that the outer tube 2 can be obtained even when the attachment portion 9 of the steel central axial force member 3 to the column / beam has a large size. There is no need to increase the cross-sectional size, and the cross-sectional dimension of the steel central axial force member 3 can be appropriately set. Moreover, as a manufacturing procedure, in order to join the semi-cylindrical divided bodies 4 after passing the steel central axial force member 3 through the half-cylindrical divided parts 4, and to fill the solidifying filling material 7 with time, The steel central axial force member 3 and the temporally solidifying filling material 7 can be easily brought into close contact with each other through the adhesion preventing film 8.

Further, when the buckling restraining member 1 for vibration suppression is small as described above, it can fit between the columns or beams of the building or structure, can reduce the wall thickness dimension, and can reduce the dead space. The indoor space can be enlarged.

It is a perspective view which shows the state just before joining a semi-cylindrical division body through a pair of semi-cylindrical division bodies by passing the steel center axial force member provided with the adhesion prevention film. It is a perspective view which shows the state just before joining the half cylindrical division body shown in FIG. 1 by welding, and filling mortar or concrete. The buckling restraining member for vibration suppression manufactured by the manufacturing method of the present invention is shown, (a) is a longitudinal side view, (b) is a cross-sectional plan view near the center of (a), ( c) is an enlarged view of light-weight particles in the light-weight aggregate constituting the temporally solidifying filling material. (A) is a side view which shows an example of the center axial force member in the conventional buckling restraining member for damping | damping, (b) is a partial vertical side view which shows the conventional buckling restraining member for damping | damping. (A) is sectional drawing of the center vicinity of the center axial force member in the conventional buckling restraining member for damping | damping shown in FIG. 4, (b) is the edge part vicinity in the conventional buckling restraining member for damping | damping shown in FIG. It is a plane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buckling restraining member 2 for vibration control 3 Outer tube 3 Steel central axial force member 4 Semi-cylindrical divided body 5 Side plate 6 Connection plate 7 Solidification filling material 8 Adhesion prevention coating 9 Attachment part 10 Styrene cell 11 Four-layer coat 12 Foamed polystyrene beads 13 Surface treatment layer

Claims (11)

The outer tube in the buckling restraining member is divided into a plurality of semi-cylindrical divided bodies, and after passing the steel central axial force member through the semi-cylindrical divided bodies, the plurality of semi-cylindrical divided bodies are joined. A method of manufacturing a buckling restraining member for vibration damping, comprising an outer tube and filling the outer tube with a solidifying filler material over time. The outer diameter of the outer tube joined with a plurality of semi-cylindrical divided bodies is made smaller than the outer diameter of the attachment portions at both ends of the steel central axial force member. The manufacturing method of the buckling restraining member for vibration suppression as described. The method of manufacturing a buckling restraining member for vibration damping according to claim 1 or 2, wherein the temporally solidifying filling material is mortar or concrete. 3. The buckling restraint for vibration suppression according to claim 1 or 2, wherein the solidifying aging filling material is lightweight mortar or lightweight concrete obtained by mixing mortar or concrete with synthetic resin-based heat insulating lightweight aggregate. Manufacturing method of member. 5. The method of manufacturing a vibration-damping buckling restraining member according to claim 4, wherein the synthetic resin-based heat insulating lightweight aggregate is foamed polystyrene. 6. The buckling for vibration damping according to any one of claims 1 to 5, wherein the fluidized temporally solidifying filling material is filled into a space in the outer tube joined with a semi-cylindrical divided body and solidified. A method for manufacturing a restraining member. After filling the solidified filling material with fluidity into the recesses of the two semi-cylindrical divided bodies and solidifying them, a steel axial force member is sandwiched between the two semi-cylindrical divided bodies, and both semi-cylindrical divided parts are separated. The method for manufacturing a vibration-damping buckling restraint member according to any one of claims 1 to 5, wherein the body is integrated by welding or a joint fitting. The method for manufacturing a vibration-damping buckling restraining member according to any one of claims 1 to 7, wherein an adhesion prevention coating is provided in advance on the steel central axial force member. An outer tube configured by arranging and joining a plurality of semi-cylindrical divided bodies is disposed outside the intermediate portion of the steel central axial force member provided with the adhesion preventing coating, and the radial direction of the outer tube The outer diameter dimension of the steel center axial force member is set to be smaller than the outer diameter dimension of the mounting portion at both ends, and the outer tube is filled and solidified with a solidifying filler material made of mortar or concrete. A buckling restraining member for vibration control, characterized in that An outer tube configured by arranging and joining a plurality of semi-cylindrical divided bodies is disposed outside the intermediate portion of the steel central axial force member provided with the adhesion preventing coating, and the radial direction of the outer tube The outer diameter dimension of the steel central axial force member is set to be smaller than the outer diameter dimension of the mounting portion at both ends, and the outer pipe is formed by mixing a synthetic resin-based heat insulating lightweight aggregate with mortar or concrete. A vibration-damping buckling restraining member characterized in that it is configured by filling and solidifying a solidifying filling material made of lightweight mortar or lightweight concrete. An outer tube configured by arranging and joining a plurality of semi-cylindrical divided bodies is disposed outside the intermediate portion of the steel central axial force member provided with the adhesion preventing coating, and the radial direction of the outer tube The outer diameter dimension of the steel central axial force member is set to be smaller than the outer diameter dimension of the mounting portion at both ends, and a lightweight mortar formed by mixing a synthetic resin such as mortar or concrete foam polystyrene in the outer tube. A buckling restraining member for vibration control, characterized by being filled with lightweight concrete.

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