WO2023031997A1

WO2023031997A1 - Hysteretic damper structure and method for assembling same

Info

Publication number: WO2023031997A1
Application number: PCT/JP2021/031718
Authority: WO
Inventors: 昭二森川; 清相田; 邦昭三好
Original assignee: 三菱重工業株式会社; 三菱パワー株式会社
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2023-03-09

Abstract

Provided is a hysteretic damper structure of which the external form can be reduced in size. A hysteretic damper structure (10) is provided between a plurality of vertically extending columns (2) and a plurality of beams (3) extending horizontally between the plurality of columns. The hysteretic damper structure comprises a pair of hysteretic damper sections (11) that are disposed at both ends in the longitudinal direction and that absorb energy by plastic deformation, and an intermediate section (20) connecting the pair of hysteretic damper sections. The intermediate section is made of a longitudinally extending hollow rectangular member and has four surfaces (20a, 20b, 20c, 20d) formed on the rectangular member. Two opposing surfaces (20a, 20b) of the four surfaces are parallel to planes formed by the columns and the beams, and the remaining two opposing surfaces (20c, 20d) are orthogonal to the planes.

Description

Hysteretic damper structure and its assembly method

The present invention relates to a hysteretic damper structure and its assembly method.

As a background art of this technical field, Patent Document 1, for example, describes a hysteretic damper structure used as a diagonal member (brace) of a steel frame structure composed of columns and beams. The hysteresis damper structure includes a pair of hysteresis damper portions arranged at both ends in the longitudinal direction, and an intermediate portion connecting the pair of hysteresis damper portions. fixed to the steel structure.

Each of the pair of hysteresis type damper parts has a core made of combined steel plates and a stiffening steel pipe arranged around the core. When the hysteresis type damper structure receives an alternating axial force of a predetermined magnitude or more due to an earthquake, the core material is plastically deformed to absorb the energy. Further, the intermediate portion is made of a round steel pipe having higher rigidity than the core material, and transmits the axial force to the pair of hysteresis type damper portions when the alternating axial force acts.

Japanese Patent No. 5216050

By the way, in an existing boiler plant, for example, the hysteretic damper structure described in Patent Document 1 may be used to perform seismic reinforcement work on the boiler support steel frame. However, various pipes, electrical cables and equipment have already been installed around the boiler support steel frame, limiting the space for fixing the hysteretic damper structure to the boiler support steel frame. Therefore, miniaturization of the outer shape of the hysteretic damper structure described in Patent Document 1 is required.

The present invention has been made in view of such circumstances, and its main purpose is to provide a hysteretic damper structure that can be miniaturized.

In order to achieve the above object, a typical present invention provides a hysteretic damper structure provided between a plurality of columns extending in a vertical direction and a plurality of beams extending horizontally between the columns. A body comprising a pair of hysteresis type damper portions arranged at both ends in the longitudinal direction and absorbing energy by plastic deformation, and an intermediate portion connecting the pair of hysteresis type damper portions, the intermediate portion a hollow rectangular member extending in a direction and having four surfaces formed on said rectangular member, two of said four surfaces facing each other being formed by said posts and said beams; Parallel to a plane, the remaining two opposing surfaces are characterized by being orthogonal to said plane.

According to the present invention, the outer shape of the hysteretic damper structure can be made smaller. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

FIG. 2 is a side view showing the overall configuration of the hysteretic damper structure according to the first embodiment; 1 shows the configuration of a hysteretic damper structure according to the first embodiment, (a) is a partial vertical cross-sectional view, (b) is a cross-sectional view taken along line 2b-2b of (a), and (c) is 2c of (a). -2c arrow sectional view. (a) is a top view showing the overall configuration of the hysteresis damper structure shown in FIG. 1, (b) is a perspective view of an intermediate portion constituting the hysteresis damper structure shown in (a), (c) is ), and (d) is a cross-sectional view along 3d-3d of (a). 3(a) to 3(d) are diagrams for explaining a method of assembling the hysteretic damper structure shown in FIG. 1; FIG. FIG. 5 is a diagram comparing the effect of the hysteretic damper structure according to the first embodiment with that of the conventional technique; (a) is a side view illustrating the overall configuration of a hysteretic damper structure according to the second embodiment, (b) is a cross-sectional view taken along line 6b-6b of (a), and (c) is a third embodiment. A side view for explaining the overall configuration of the hysteresis damper structure, (d) is a cross-sectional view taken along line 6d-6d of (c), and (e) is for explaining the overall configuration of the hysteresis damper structure according to the fourth embodiment. (f) is a cross-sectional view taken along line 6f-6f of (e). Figure 6(f) shows another embodiment of Figure 6(f);

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the hysteretic damper structure 100 is a steel structure composed of a plurality of columns 2 extending in the vertical direction and a plurality of beams 3 extending horizontally between the columns 2. 1, it is provided on a diagonal line between these pillars 2 and beams 3 . The hysteresis damper structure 100 includes a pair of hysteresis damper portions 11 arranged at both ends in the longitudinal direction, and an intermediate portion 20 connecting the pair of hysteresis damper portions 11 . A pair of hysteretic damper portions 11 each includes a core member 12 and a stiffening steel pipe 18 . The hysteresis type damper structure 100 is fixed via joint portions 13 by bolt joints 15 to the joint members 4 respectively attached to the diagonal joints between the columns 2 and the beams 3 .

<Core material 12>
The core material 12 has a cross-shaped cross section by combining steel plates of uniform thickness (FIG. 2(b)). The core member 12 has one end connected to the intermediate portion 20 and the other end provided with the joint portion 13 . The core member 12 is integrally formed in the axial direction from the connection end with the intermediate portion 20 to the joint portion 13 . The hysteresis type damper portion 11 absorbs energy by plastically deforming the core member 12 when an alternating axial force of a predetermined magnitude or more acts. The core member 12 and the intermediate portion 20 may be connected by a known method such as using an interrupted gusset plate. Further, the joint portion 13 is provided with a bolt hole 14 for joining the joint member 4 with a bolt joint 15 (FIG. 2(a)). Furthermore, in order to improve the rigidity of the core material 12, a plurality of stiffening plates 16 made of steel are fixed to the side where the joint part 13 is provided by a known technique such as welding (Fig. 2 ( c)).

<Stiffening steel pipe 18>
The stiffening steel pipe 18 has a rectangular cross section and is arranged around the core material 12 with a predetermined gap d therebetween. Inside the stiffening steel pipe 18 , the tops of the projecting plates 12 a to 12 d forming the cross-shaped core member 12 face the corners of the stiffening steel pipe 18 . The stiffening steel pipe 18 restrains the core member 12 from buckling by preventing deformation exceeding the predetermined gap d when the core member 12 receives alternating axial force. As a result, the core material 12 exhibits the same elastoplastic behavior when receiving a compressive axial force as when receiving a tensile force. One end of the stiffening steel pipe 18 is connected to the intermediate portion 20, and the other end is provided with an open end portion 19 through which the core member 12 penetrates (FIG. 2(a)). Since the core material 12 penetrates through the open end portion 19, it is allowed to expand and contract when receiving an alternating axial force.

<Intermediate part 20>
The intermediate portion 20 is positioned between the pair of hysteretic damper portions 11 to connect them. The intermediate portion 20 has higher rigidity than the core member 12, and transmits the axial force to the pair of hysteresis type damper portions 11 when the alternating axial force acts. By providing the intermediate portion 20, compared to a structure in which the hysteresis damper structure occupies the entire length in the case where the intermediate portion 20 is not provided, the manufacturing accuracy control of the hysteresis damper portion 11 is facilitated. It is possible to lengthen the mold damper structure 100 . Since the yield axial force can be adjusted by the hysteresis damper portion 11 and the axial rigidity can be adjusted by the intermediate portion 20, the optimum member characteristics can be set for the hysteresis damper structure 100. becomes possible. Details of the shape of the intermediate portion 20 will be described later.

<Basic action of the hysteresis type damper structure>
For example, when an earthquake load acts on the hysteresis damper structure 100, the alternating axial force (tensile force and compression force) is applied to the hysteresis damper structure 100 via the joints 13 at both ends of the hysteresis damper structure 100. It is transmitted to the intermediate part 20 via the core material 12 of 11. Then, when the tensile axial force reaches the yield axial force (+Ny) of the core material 12, plastic deformation (+δ) occurs, and when the compressive axial force reaches the yield axial force (−Ny) of the core material 12, plastic deformation (−δ ) occurs. At this time, the core material 12 that receives the compressive axial force tends to undergo buckling deformation, but the stiffening steel pipe 18 restrains the deformation and prevents the buckling. Thus, the entire hysteretic damper structure 100 responds with a hysteresis curve, resulting in absorption of seismic energy and damping of vibration.

In the course of the history described above, when a tensile force acts on the core material 12 in a steady state in which no alternating axial force acts, the core material 12 passes through the open end 19 and is exposed to the outside of the stiffening steel pipe 18. In some cases, even if the core material 12 exposed to the outside receives a compressive axial force, the stiffening plate 16 prevents the core material 12 from locally buckling deformation.

<Shape of intermediate portion 20>
Details of the shape of the intermediate portion 20 according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 3(a) and (b), the intermediate portion 20 is a hollow rectangular steel pipe (rectangular steel pipe) extending in the longitudinal direction (horizontal direction in FIG. 3(a), in other words, the axial direction). shaped member) and has four surfaces formed on this rectangular steel tube and four back surfaces corresponding to these four surfaces. The four surfaces consist of a front surface 20a, a rear surface 20b opposite the front surface 20a, an upper surface 20c perpendicular to the front surface 20a and the rear surface 20b, and a lower surface 20d opposite the upper surface 20c.

As shown in FIG. 1, when the hysteretic damper structure 100 is fixed to the steel frame structure 1, the front surface 20a and the rear surface 20b (two surfaces facing each other) of the intermediate portion 20 are the pillars 2 and the beams 3. It is a plane parallel to the plane R formed by and. On the other hand, the upper surface 20c and the lower surface 20d (remaining two surfaces facing each other) of the intermediate portion 20 are surfaces orthogonal to the plane R thereof. In the present embodiment, the shape of the longitudinal section obtained by cutting the intermediate portion 20 along a plane orthogonal to the longitudinal direction (axial direction) is "square", but it may be "rectangular". Here, the term "square" includes not only a shape whose four corners are completely right-angled, but also a shape in which the four corners are rounded for manufacturing reasons. The same applies to the case of "rectangle".

In addition, as shown in FIGS. 3(a) and 3(b), the intermediate portion 20 has a split structure that can be split into two along a direction perpendicular to the longitudinal direction at the central position. ing. Specifically, the intermediate portion 20 has a first intermediate portion 21 and a second intermediate portion 22 . One end of the first intermediate portion 21 is connected to the hysteretic damper portion 11 (core material 12 ), and the other end of the first intermediate portion 21 is connected to the second intermediate portion 22 . Similarly, one end of the second intermediate portion 22 is connected to the hysteretic damper portion 11 (core material 12 ), and the other end of the second intermediate portion 22 is connected to the first intermediate portion 21 .

The first intermediate portion 21 and the second intermediate portion 22 are a plurality of long flat plate-shaped splices arranged on the front side and the back side across the connecting portion of the first intermediate portion 21 and the second intermediate portion 22. It is connected via a plate (also called “splicing plate”) 23 . Hereinafter, in the first embodiment, the splice plate (first connection plate) 23 arranged on the front side is referred to as "first splice plate 23", and the splice plate (second connection plate) 23 arranged on the back side. is referred to as "second splice plate 23".

A plurality of (18 in the first embodiment) bolt holes 23a are formed in the first splice plate 23 and the second splice plate 23, and the first intermediate portion 21 and the second intermediate portion 22 each have a Bolt holes 20e are formed at positions corresponding to the bolt holes 23a when the splice plate 23 is attached. Then, bolts 24a are inserted into the bolt holes 23a of the first splice plate 23, the bolt holes 20e of the first intermediate portion 21 and the second intermediate portion 22, and the bolt holes 23a of the second splice plate 23. A nut 24b is attached to 24a (FIG. 3(c)). Note that the diameter and number of bolts are determined in consideration of the arrangement of the bolts 24a according to the alternating axial force acting on the hysteretic damper structure 100 and the size of the splice plate 23, so that the number of bolts varies. Therefore, the number of

bolt holes

23a and 20e is not limited to 18 as described above, but may be 12, for example, and bolts 24a may be inserted into these

bolt holes

23a and 20e.

Circular openings (through holes) 25 are formed in the first intermediate portion 21 and the second intermediate portion 22 near the positions where the first splice plate 23 and the second splice plate 23 are arranged, respectively. It is Specifically, an opening window 25 is formed in the front surface 20 a and the rear surface 20 b of the first intermediate portion 21 so as to be adjacent to one end of the first splice plate 23 and the second splice plate 23 . Similarly, the front surface 20a and the rear surface 20b of the second intermediate portion 22 are formed with opening windows 25 adjacent to the other ends of the first splice plate 23 and the second splice plate 23, respectively. The size of the opening window 25 is set so that the fingers, arms, elbows, etc. of the operator can be inserted. Note that the shape of the opening window 25 is not limited to a circular shape. A closing plate 26 is attached so as to close the opening window 25 (FIG. 3(d)).

<Method for assembling hysteretic damper structure 100>
Next, a method for assembling the hysteretic damper structure 100 according to the first embodiment will be described with reference to FIG. For convenience of explanation, only the intermediate portion 20 is shown in FIG. 4, and the configuration of the hysteretic damper portion 11 and the like is not shown.

First, the pair of hysteretic damper portions 11 (one end of the core material 12) are connected by welding, for example, an interrupt gusset plate to one end side of the first intermediate portion 21 and one end side of the second intermediate portion 22 ( not shown).

Next, as shown in FIG. 4A, one end side of the first splice plate 23 is arranged on the surface of the other end side of the second intermediate portion 22 (the side opposite to the end portion to which the hysteretic damper portion 11 is attached). Then, one end side of the second splice plate 23 is arranged on the back surface of the other end side of the second intermediate portion 22 . At this time, the plurality of bolt holes 23a provided in the first splice plate 23, the plurality of bolt holes 23a provided in the second splice plate 23, and the plurality of bolt holes 20e provided in the second intermediate portion 22 position.

Then, an operator puts his or her finger into the opening window 25 of the second intermediate portion 22 for the bolt holes 20e and 23a of all or part of the first splice plate 23, the second intermediate portion 22, and the second splice plate 23. Insert the arm, elbow, etc., insert the bolt 24a, and fasten (temporarily tighten) the nut 24b to the inserted bolt 24a. As a result, one end side of the first splice plate 23 and one end side of the second splice plate 23 are fixed (semi-fixed) to the second intermediate portion 22 . This series of operations is also performed on the remaining front and back surfaces of the second intermediate portion 22 .

In this way, the first splice plate 23 and the second splice plate 23 are each fixed (semi-fixed) to the second intermediate portion 22 at one end, and have a gap S (for inserting the first intermediate portion 21) at the other end. FIG. 4(a)) is formed.

Next, as shown in FIG. 4B, the other end side of the first intermediate portion 21 is inserted into the gap S provided between the first splice plate 23 and the second splice plate 23, and the first The first intermediate portion 21 is pushed toward the second intermediate portion 22 until the ends of the intermediate portion 21 and the second intermediate portion 22 are in contact with each other (FIG. 4(c)).

The plurality of bolt holes 23a provided in the first splice plate 23, the plurality of bolt holes 23a provided in the second splice plate 23, and the bolt holes 20e provided in the first intermediate portion 21 are aligned. Then, an operator inserts fingers, arms, elbows, or the like from the opening window 25 of the first intermediate portion 21, inserts the bolt 24a into each of the bolt holes 20e and 23e, and tightens the nut 24b to the inserted bolt 24a. Then, in the state shown in FIG. 4(a), all the bolts 24a are tightened together with the temporarily tightened bolts 24a. In addition, in the state of FIG. 4A, when the bolts 24a are inserted only into some of the bolt holes 20e and 23a, the bolts 24a are inserted into all the places where the bolts 24a are not inserted. A nut 24b is fastened to the bolt 24a. Thereby, the other end side of the first splice plate 23 and the other end side of the second splice plate 23 are fixed to the first intermediate portion 21 (FIG. 4(d)). After performing such work on all the front and back surfaces of the first intermediate portion 21 , all the opening windows 25 are finally covered with the closing plate 26 . By the above procedure, the first intermediate portion 21 and the second intermediate portion 22 are connected via the first splice plate 23 and the second splice plate 23, and the assembly work of the hysteretic damper structure 100 is completed.

<Description of effect>
First, the effects of the square cross-sectional shape of the intermediate portion 20 on the outer dimensions will be described. The maximum stress σ _max generated in the member is obtained by the formula σ _max =M/Z. where M is the bending moment and Z is the section modulus. From this equation, when the bending moment M is constant, the section modulus Z should be kept constant in order to keep the maximum stress σ _max generated in the member constant. Since the section modulus Z is determined according to the cross-sectional shape of the member, if the outer dimensions of each member are obtained and compared so that the cross-sectional area of each member and the section modulus Z are equal, the same design conditions (i.e. , the bending moment M is constant, and the maximum stress σ _max is constant), the cross-sectional shape with the smallest outer dimension can be known.

Fig. 5 compares the external dimensions for square, circular, and rhomboid cross-sectional shapes under the same design conditions as described above. In FIG. 5, L1 is the neutral axis of each cross section, L2 is a straight line passing through the upper end of the square cross section, L3 is a straight line passing through the lower end of the square cross section, L4 is a straight line passing through the upper end of the circular cross section, and L5 is the lower end of the circular cross section. , L6 is a straight line passing through the top end of the rhombic cross-section, and L7 is a straight line passing through the bottom end of the rhombic cross-section.

As shown in FIG. 5, the square outer dimension _h1 corresponds to the length between the upper line L2 and the lower line L3, and the circular outer dimension _h2 corresponds to the length between the upper line L4 and the lower line L5. , the outer dimension _h3 of the rhombus corresponds to the length between the upper line L6 and the lower line L7. Therefore, the size relationship of the outer dimensions of the square, the circle, and the rhombus is "h ₁ <h ₂ <h ₃ ". Therefore, when the cross section is square, the outer dimensions can be reduced by (h ₂ −h ₁ ) compared to when the cross section is circular, and when compared to when the cross section is rhomboid, the outer dimensions can be reduced by ( h ₃ -h ₁ ).

Thus, when designing so that the cross-sectional area (corresponding to mass per unit length) and bending moment M are constant and the maximum stress _σmax acting on the intermediate portion 20 is constant, the cross-sectional shape is square. However, compared to other cross sections (circular, rhomboid), the outer dimensions can be minimized. In the first embodiment, the intermediate portion 20 is made of a hollow rectangular steel pipe having a square cross section, so that the hysteretic damper structure 100 has a more compact outer dimension than the conventional one.

In addition, when conducting seismic reinforcement work in an existing boiler plant, since various pipes, electrical cables, and equipment have already been installed around the boiler support steel frame, a hysteretic damper structure will be installed. Space is often very tight. However, according to the first embodiment, since the intermediate portion 20 having a hollow square cross section is designed to be compact, the hysteretic damper structure can be constructed even in a narrow space without performing large-scale modification work. 100 can be installed. More specifically, in order to install the hysteresis type damper structure 100, it is possible to reduce the number of man-hours for disassembly work and modification work for avoiding interference with pipes, electric cables, equipment, etc. attached to the boiler support steel frame. .

Also, in the first embodiment, the intermediate portion 20 can be divided into the first intermediate portion 21 and the second intermediate portion 22 . Therefore, handling of the first intermediate portion 21 and the second intermediate portion 22 is easier than when the intermediate portion 20 is handled as a single unit. For example, compared to the case where the intermediate part 20 is hung integrally, the length is about half, so when moving the first intermediate part 21 and the second intermediate part 22 respectively, interference with equipment etc. is reduced. Since handling becomes easier and the suspension load is about half, the size of the suspension jig and suspension device can be reduced. In particular, in an existing boiler plant, the space for routing and the space after installation are limited, so it is very convenient if the intermediate section 20 has a split structure. In addition, since the intermediate part 20 can be disassembled for transportation, the size and weight of the maintenance floor and scaffolding can be reduced.

In addition, since the intermediate portion 20 of the hysteretic damper structure 100 can be divided, both the length and the mass can be approximately halved. When such a hysteresis type damper structure 100 is attached to the existing steel frame structure 1, the hysteresis type damper structure 100 must be brought into the boiler building from outside the boiler building and moved to a predetermined installation location. During this movement, there are many obstacles (equipment, pipes, etc.) and, of course, there is no floor for access. Moreover, even if an access floor is installed, the strength of the floor may not be sufficient.

Under such circumstances, when the load of the hysteresis damper structure 100 is temporarily deposited on the beam 3 of the existing steel frame structure 1 on the route to move the hysteresis damper structure 100 to a predetermined installation location in the boiler building. There is In this case, the following first to fourth cases are conceivable. In the first case, a suspension lug is simply attached to the beam 3 by welding or the like, and the load of the hysteretic damper structure 100 is transferred to the beam 3 via this suspension lug. not.

On the other hand, in the second case, there is no beam 3 at the position where the load for moving the hysteretic damper structure 100 is suspended. In this case, a new beam 3 must be installed. . In the third case, the strength of the beam 3 at the position where the load is suspended is insufficient. In this case, the existing beam 3 must be reinforced. Furthermore, the fourth case is a case where the floor for access is installed in the existing steel structure 1 and this floor is moved. Reinforcement of floor beams and elimination of other obstacles must be carried out. Therefore, in the case of the third case and the fourth case described above, since the above-mentioned reinforcement and additional reinforcement occur, the hysteresis type damper structure 100 should have a shorter length, and the mass (load) should be reduced. A lighter one can reduce the reinforcement range and reinforcement content.

Further, in the first embodiment, the first splice plate 23 is arranged on the front surface side across the connecting portion between the first intermediate portion 21 and the second intermediate portion 22, and the second splice plate is arranged on the back surface side. Since the first intermediate portion 21 and the second intermediate portion 22 are connected via the plate 23, the work of connecting the first intermediate portion 21 and the second intermediate portion 22 is simple. Furthermore, since the first intermediate portion 21 and the second intermediate portion 22 are connected by the two splice plates 23, even if the load acting on the hysteretic damper structure 100 is large, the load can be withstood.

In addition, in the first embodiment, since the opening windows 25 are provided in the first intermediate portion 21 and the second intermediate portion 22, respectively, there is no need to prepare a special tool or the like when attaching the splice plate 23. , no complicated work is required. In addition, since the cover plate 26 that closes the opening window 25 is provided, there is an advantage that rainwater and dust can be prevented from entering the intermediate portion 20 . Note that the assembly method described in the first embodiment can be applied even if the intermediate portion 20 is a rectangular member with a rhombic cross section.

(Reference to other embodiments)
Next, another embodiment of the divided structure of the intermediate portion 20 will be described. In addition, in the following description, the same reference numerals are given to the same configurations as those of the above-described first embodiment, and the description thereof is omitted.

(Second embodiment)
A hysteretic damper structure 200 according to the second embodiment will be described with reference to FIGS. This hysteretic damper structure 200 differs from the first embodiment in that the first intermediate portion 21 and the second intermediate portion 22 are connected via flange portions 27a and 27b without using a splice plate 23. different.

The other end of the first intermediate portion 21 is provided with a first flange portion 27a, and the other end of the second intermediate portion 22 is provided with a second flange portion 27b. A plurality of (12 in the second embodiment) bolt holes (not shown) are formed in each of the first flange portion 27a and the second flange portion 27b, and bolts 24a are inserted into these bolt holes.

A method of assembling the hysteretic damper structure 200 according to the second embodiment will be described. First, the hysteretic damper section 11 is connected to one end side of each of the first intermediate section 21 and the second intermediate section 22 . Next, the first flange portion 27a of the first intermediate portion 21 and the second flange portion 27b of the second intermediate portion 22 are brought into contact with each other. In this state, the bolts 24a are inserted from the first intermediate portion 21 side into the bolt holes formed in the respective flange portions 27a and 27b, and nuts (not shown) are attached from the second intermediate portion 22 side for fastening. The first flange portion 27a and the second flange portion 27b are connected. This completes the assembly work of this hysteretic damper structure 200 .

According to the hysteretic damper structure 200 according to the second embodiment, the same effects as those of the first embodiment can be obtained. In particular, since the first intermediate portion 21 and the second intermediate portion 22 can be connected via the first flange portion 27a and the second flange portion 27b, the assembly work is easy. It should be noted that the second embodiment is preferably adopted when the magnitude of the load acting on the steel frame structure 1 is relatively small.

(Third embodiment)
A hysteretic damper structure 300 according to the third embodiment will be described with reference to FIGS. This hysteretic damper structure 300 differs from the first embodiment in that the first intermediate portion 21 and the second intermediate portion 22 are joined by welding without using the splice plate 23 .

A method of assembling the hysteretic damper structure 300 according to the third embodiment will be described. First, the hysteretic damper section 11 is connected to one end side of each of the first intermediate section 21 and the second intermediate section 22 . Next, the other end side of the second intermediate portion 22 and the other end side of the first intermediate portion 21 are butted against each other and joined by welding. This completes the assembly work of the hysteretic damper structure 300 .

According to the hysteretic damper structure 300 according to the third embodiment, it is possible to achieve the same effects as those of the first embodiment. In particular, it is effective when the magnitude of the load acting on the steel frame structure 1 is very large.

(Fourth embodiment)
A hysteretic damper structure 400 according to the fourth embodiment will be described with reference to FIGS. This hysteretic damper structure 400 differs from the first embodiment in that the splice plate 23 is arranged only on the surface side of the connecting portion between the first intermediate portion 21 and the second intermediate portion 22 .

A method of assembling the hysteretic damper structure 400 according to the fourth embodiment will be described. First, the hysteretic damper section 11 is connected to one end side of each of the first intermediate section 21 and the second intermediate section. Next, one end side of a splice plate (connection plate) 23 is attached to each of the four surfaces on the other end side of the second intermediate portion 22 using bolts 24a. Next, while the other end side of the second intermediate portion 22 and the other end side of the first intermediate portion 21 are in contact with each other, four surfaces on the other end side of the first intermediate portion 21 are bolted using bolts 24a. Attach the other end of the splice plate 23 . This completes the assembly work of this hysteretic damper structure 400 .

According to the hysteretic damper structure 400 according to the fourth embodiment, it is possible to achieve the same effects as those of the first embodiment. In particular, in the fourth embodiment, since the number of splice plates 23 is smaller than that in the first embodiment, the assembly work time can be shortened compared to the first embodiment. In addition, it is preferable to apply 4th Embodiment when the load which acts on the steel-frame structure 1 is smaller than 1st Embodiment. Also in the fourth embodiment, the opening window 25 shown in the first embodiment may be provided. Furthermore, a configuration such as that shown in FIG. 7 may be employed in which the splice plate 23 is attached to the intermediate portion 20 using bolts 24a and nuts 24b.

The present invention is not limited to the above embodiments, and various modifications are possible without departing from the gist of the present invention. Subject to invention. Although the above embodiments show preferred examples, those skilled in the art can realize various alternatives, modifications, variations or improvements from the contents disclosed in this specification, These are included in the technical scope described in the appended claims.

For example, in the above embodiment, as shown in FIG. 1, both ends of the hysteretic damper structure 100 are fixed to the joint members 4 respectively attached to the diagonal joints between the columns 2 and the beams 3. It is not limited to this. For example, one end of the hysteresis damper structure 100 may be fixed to the joint member 4 between the column 2 and the beam 3, while the other end of the hysteresis damper structure 100 may be fixed to the center of the beam 3. .

Also, in the first embodiment, the intermediate portion 20 has a split structure, but it is not limited to this, and the intermediate portion 20 may have an integral structure. In addition, in the first embodiment, the opening windows 25 are formed on the front surface 20a and the rear surface 20b of the intermediate portion 20, but are not limited to this configuration, and may be formed on the upper surface 20c and the lower surface 20d of the intermediate portion 20. Alternatively, they may be provided on all

surfaces

20a, 20b, 20c, and 20d.

2 pillar 3 beam 11 hysteretic damper section 20 intermediate section 20a front surface (two surfaces facing each other)
20b posterior surface (two opposing surfaces)
20c upper surface (remaining two opposing surfaces)
20d lower surface (remaining two opposing surfaces)
21 first intermediate portion 22 second intermediate portion 23 splice plate (connection plate, first connection plate, second connection plate)
25 opening window (through hole)
27a first flange portion 27b

second flange portion

100, 200, 300, 400 hysteresis type damper structure R plane

Claims

A hysteretic damper structure provided between a plurality of columns extending in a vertical direction and a plurality of beams extending horizontally between the plurality of columns,
a pair of hysteretic damper portions arranged at both ends in the longitudinal direction and absorbing energy by plastic deformation;
an intermediate portion connecting the pair of hysteretic damper portions,
said intermediate portion comprising a longitudinally extending hollow rectangular member and having four surfaces formed on said rectangular member;
Of the four surfaces, two opposing surfaces are parallel to the plane formed by the pillar and the beam, and the remaining two opposing surfaces are orthogonal to the plane. A hysteresis type damper structure.
The hysteretic damper structure according to claim 1,
The intermediate portion has a first intermediate portion and a second intermediate portion that can be split in the longitudinal direction,
A hysteretic damper structure, wherein the first intermediate portion and the second intermediate portion are joined by welding.
The hysteretic damper structure according to claim 1,
The intermediate portion has a first intermediate portion and a second intermediate portion that can be split in the longitudinal direction,
The first intermediate portion is provided with a first flange portion, the second intermediate portion is provided with a second flange portion,
A hysteretic damper structure, wherein the first intermediate portion and the second intermediate portion are connected via the first flange portion and the second flange portion.
The hysteretic damper structure according to claim 1,
The intermediate portion has a first intermediate portion and a second intermediate portion that can be split in the longitudinal direction,
A hysteretic damper structure, wherein the first intermediate portion and the second intermediate portion are connected via a connecting plate arranged on the surface side across both.
The hysteretic damper structure according to claim 1,
The intermediate portion has a first intermediate portion and a second intermediate portion that can be split in the longitudinal direction,
The first intermediate portion and the second intermediate portion are connected via a first connecting plate arranged on the front side and a second connecting plate arranged on the back side across both. History type damper structure.
In the hysteretic damper structure according to claim 5,
The first intermediate portion and the second intermediate portion are large enough to allow the operator's fingers, arms, elbows, etc. to be inserted near the positions where the first connecting plate and the second connecting plate are arranged, respectively. A hysteretic damper structure, characterized in that a through hole with a depth is provided.
A pair of hysteresis damper portions arranged at both ends in the longitudinal direction to absorb energy by plastic deformation, and an intermediate portion formed of a hollow rectangular member extending in the longitudinal direction and connecting the pair of hysteresis damper portions. , the intermediate portion has a first intermediate portion and a second intermediate portion that can be divided in the longitudinal direction, and the first intermediate portion and the second intermediate portion are provided with fingers, arms, elbows, etc. of the operator, respectively. A method for assembling a hysteretic damper structure having a through hole sized to allow insertion of
connecting the pair of hysteretic damper portions to one end side of the first intermediate portion and one end side of the second intermediate portion;
One end side of the first connection plate is arranged on the surface of the other end side of the second intermediate portion, one end side of the second connection plate is arranged on the back surface, and an operator inserts a finger into the through hole of the second intermediate portion. , arms, elbows, etc. are put in, one end side of the first connection plate and one end side of the second connection plate are temporarily fixed to the second intermediate portion with bolts, and the other end side of the first connection plate and providing a gap for inserting the first intermediate portion between the second connecting plate and the other end of the second connecting plate;
After inserting the other end side of the first intermediate portion into the gap provided between the other end side of the first connecting plate and the other end side of the second connecting plate, a step of fixing the other end side of the first connection plate and the other end side of the second connection plate to the first intermediate portion by bolts by inserting fingers, arms, elbows, or the like of an operator into the through holes; A method for assembling a hysteretic damper structure, comprising: