JP2000213205A - Damper construction of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper construction capable of effectively damping at low cost without directionality in the damping of vibration of a structure. SOLUTION: A sideway member 7 for fixing is projectingly provided in the horizontal direction through a rib 13 fitted to a reinforcing ring 12 fitted to the outer circumference of a cylindrical body 1, and the upper end part of a steel bar damper 10 of circular section is fitted and fixed to the fitting hole 7a provided on the sideway member 7 for fixing. The lower end of the steel bar damper 10 is engaged with the hole 11a of a load member 11 projectingly provided from a horizontal supporting member 4, so as to allow movement in the axial direction and restrain movement in the horizontal direction. The axis line Z2 in the lengthwise direction of the steel bar damper 10 is made in parallel with the axis line Z1 in the lengthwise direction of the cylindrical body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper structure for damping vibration of a structure such as a chimney.

[0002]

2. Description of the Related Art FIGS. 8 and 9 show an example of the structure of a chimney, in which a tubular body 1 erected on the ground is made up of a steel tower 2 and a horizontal member 3.
In the configuration supported by the above, there is a tubular body 1 between the tubular body 1 and the horizontal member 3.
A plurality of steel dampers 5 for suppressing vibration of the steel are inserted. FIG. 10 shows the details of the main part (part C), in which the lower end of a steel damper 5 whose base end is fixed to the horizontal support member 4 is inserted between a pair of stoppers 6-6 provided on the tubular body 1. With the configuration, the vibration of the cylindrical body 1 is absorbed and attenuated by the deformation of the steel damper 5. That is,
This steel damper is made up of cylindrical body 1 by external force such as earthquake or wind.
The present invention can be applied to a structure in which relative displacement occurs between the horizontal support member 4 to which the steel damper 5 is fixed.

[0003]

However, the above-mentioned conventional steel damper 5 is generally made of an H-shaped, I-shaped or rectangular cross-section steel. Therefore, for example, in the case of a rectangular cross-section as shown in FIG. , X-x direction (perpendicular to the cylinder body center direction y-y) exerts an effect of a capacity of 100% only on vibration s, but has an effect on vibrations s' or s "in other directions. For this reason, conventionally, it is necessary to arrange a large number (four sets in the figure) of steel dampers 5 around the cylindrical body 1 as shown in FIG. SUMMARY OF THE INVENTION In view of the above-described problems, an object of the present invention is to provide a damper structure capable of performing low-cost and effective damping without damping the vibration of a structure. I do.

[0004]

According to the first aspect of the present invention, there is provided a damper structure for attenuating the vibration of a structure which is an attenuated body, wherein the damper member is formed of a round bar having a circular cross section. Fixing one end in the longitudinal direction of the damper member to a fixing attachment material projecting laterally from the structure,
A load member protruded in a lateral direction from a base constructed separately from the structure at a portion separated from the one end in the longitudinal direction of the damper member is allowed to move in the longitudinal direction, A structure in which movement in a direction perpendicular to the direction is engaged so as to restrain the damper member so that the longitudinal axis of the damper member is parallel to the longitudinal axis of the structure. Is provided.

According to a second aspect of the present invention, there is provided the damper structure according to the first aspect, wherein the damper member is made of steel. According to the third aspect of the present invention, there is provided the damper structure according to the first aspect of the present invention, wherein the portion to be engaged with the load member is the other end in the longitudinal direction of the damper member.

According to a fourth aspect of the present invention, there is provided a damper structure according to the first aspect, wherein the damper member is fixed to the fixing side member via a mounting ring having a width in the longitudinal direction. . According to the fifth aspect of the present invention, there is provided the damper structure according to the fourth aspect of the present invention, wherein the inner surface of the mounting ring in contact with the damper member has a curved surface that opens outward at the end near the load member.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the portion of the damper member separated from the portion engaged with the load member is provided on the supporting side projecting laterally from the structure. A damper structure is provided which is not movable in the lateral direction and is movably engaged in the longitudinal direction. Claim 7
According to the invention of claim 6, in the invention of claim 6, a portion of the damper member supported by the supporting side member is an end opposite to an end fixed to the fixing attachment material, and the damper member is There is provided a damper structure adapted to be engaged with a load member at a portion intermediate between these two end portions. According to an eighth aspect of the present invention, in the invention of the sixth aspect, the engaging portion of the supporting side member with the damper member is formed in a curved surface, and the supporting side member is formed by an external tangent line surrounding the damper member. A damper structure adapted to support a member is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a damper structure according to the present invention will be described with reference to the drawings. 1 and 2 show the first
An example of installation when the damper structure of the embodiment is applied to the chimney shown in FIG. This damper structure is installed between the tubular body 1 and the horizontal support member 4 where relative displacement occurs due to an external force such as an earthquake or wind.

As shown in the figure, a fixing side member 7 is projected in a horizontal direction via a rib 13 attached to a reinforcing ring 12 attached to the outer periphery of the tubular body 1.
The upper end portion of a steel bar damper 10 made of a steel bar having a circular cross section is fitted and fixed to the mounting holes 7a and 7b formed in the steel tower 2, and the lower end portion of the steel bar damper 10 is moved laterally from the horizontal support member 4 of the steel tower 2. Is fitted into a hole 11a formed in the load member 11 protruding from
Horizontal movement engages to restrain. here,
The dimensions of the fixing side member 7 and the load member 11 are selected such that the longitudinal axis Z2 of the steel bar damper 10 is parallel to the longitudinal axis Z1 of the cylindrical body 1. In the first embodiment, two sets of the steel bar dampers 10 are arranged on the cylindrical body 1 as shown in FIG.
It may be a set.

When a vibration s occurs in the cylindrical body 1, the vibration s
Is transmitted from the rib 13 to the fixing side member 7, thereby forcibly deforming the steel bar damper 10 using the support center O1 of the load member 11 as an action point, and the vibration energy of the cylindrical body 1 is absorbed by the deformation energy. The vibration of the cylinder body 1 is attenuated.

FIG. 4 shows the characteristics of the steel bar damper 10 in this case. Since the damper 10 has a circular cross section, the vibration s in the direction xx perpendicular to the cylinder body center direction yy is xy. Naturally, the same damping effect of the same ability can be exerted on vibrations s' and s "in arbitrary directions including the yy direction. It is not necessary to arrange many dampers around one body,
The required damping effect can be obtained with the minimum necessary arrangement of the damper structure, and the equipment cost is greatly reduced.

Next, a damper structure according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a mounting ring 9 is provided around a steel bar damper 10 and the steel bar damper 10 is attached to the mounting ring 9.
Are different from the first embodiment in that they are fitted into the holes 7a 'and 7b' of the fixing side member 7 via the through hole, but the other parts are the same. The lower end of the inner surface of the mounting ring 9 which is in contact with the steel bar damper 10 is a curved surface 9a extending outward.

In the second embodiment, the vibration of the tubular body 1 can be attenuated by the same operation as in the first embodiment. However, the steel bar damper 10 has a curved lower end extending outward. Since it is fitted into the hole of the fixing side member 7 via the ring 9, the portion that contacts the lower end of the fixing side member 7 as in the case of the first embodiment when vibration occurs is generated. There is no stress concentration due to sudden bending, and durability is improved.

Next, a damper structure according to a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, the fixing side member 7 and the method of attaching the steel bar damper 10 to the fixing side member 7 are the same as those in the first embodiment. However, in addition to the fixing side member 7, a supporting side member 8 is further provided via a rib 13 attached to the reinforcing ring 12.

The supporting member 1 is attached to the side member 8.
The lower end portion of the steel bar damper 10 is fitted to the support ring 14, and the steel bar damper 10 is supported by the side member 8 via the support ring 14 so as to be movable in the longitudinal direction and immovable in the lateral direction. Have been. here,
The support ring 14 provided on the supporting side member 8 has a curved support surface, and supports the steel bar damper 10 with a line circumscribing the steel bar damper 10.

On the other hand, an intermediate portion in the longitudinal direction of the steel bar damper 10 is formed on a load member 11 projecting laterally from the horizontal support member 4 of the steel tower 2 as in the first and second embodiments. It is fitted into the hole 11a, and is engaged so as to allow movement in the axial direction and restrict movement in the horizontal direction.

In the first and second embodiments, since the steel bar damper 10 is cantilevered by the fixing side member 7, a large bending stress is applied when vibration is generated. As shown in the above, at the upper end and the lower end, it is fixed in the lateral direction so that a large bending stress is not applied when vibration occurs. Therefore, as compared with the first and second embodiments, the strength required for the fixing side member 7 and the steel bar damper 10 is reduced, and as a result, the whole can be formed small and lightweight. .

FIG. 7 shows a structure of a fourth embodiment, which is a combination of the third embodiment and the second embodiment. That is,
The difference from the third embodiment is that a steel bar damper 10 is fitted and attached to the fixing side member 7 via a mounting ring 9. With this configuration, the fourth embodiment further suppresses stress concentration and improves durability as compared with the third embodiment.

[0019]

According to the invention described in each claim, the damper member is made of a round bar having a circular cross section, and can also attenuate vibrations in a direction perpendicular to the longitudinal direction of the structure. . According to claims 4 and 5, the damper member is:
Attached to the fixing side member via a mounting ring having a width in the longitudinal direction, abrupt bending of the damper member is prevented, and durability of the damper member is improved. In particular, claim 5
With such a configuration, a curved surface that opens outward is formed at the end of the mounting ring on the inner surface in contact with the damper member, which is closer to the load member. improves. According to the invention of claim 6, since the damper member is supported at two places, the strength required for the fixing side member and the damper member is reduced, and as a result, the whole is formed small and lightweight. Can be.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a diagram showing an arrangement of a steel bar damper in the first embodiment.

FIG. 4 is a diagram showing characteristics of a steel bar damper.

FIG. 5 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a diagram illustrating a configuration of a third exemplary embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a fourth exemplary embodiment of the present invention.

FIG. 8 is a side view of a configuration example of a chimney.

FIG. 9 is a sectional view of an intermediate portion of the chimney of FIG. 8;

FIG. 10 is a diagram showing details of a portion C in FIG. 9;

FIG. 11 is a diagram illustrating a force acting on a steel damper 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cylindrical body 2 ... Steel tower 3 ... Horizontal member 4 ... Horizontal support member 7 ... Side member 7a, 7b, 7a ', 7b' ... Hole 8 ... Side member for support 9 ... Mounting ring 10 ... Steel bar damper 11 ... Load member 12 ... Reinforcement ring 13 ... Rib 14 ... Support ring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Haruyuki Kanayama 4--22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Yoshiaki Itakura Kannon-Shimmachi 4 No. 6-22, Mitsubishi Heavy Industries, Ltd.Hiroshima Research Center (72) Inventor Yasushi Nukai 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Haruo Yokoyama 1, Uchisaiwaicho, Chiyoda-ku, Tokyo No. 1-3 Tokyo Electric Power Company (72) Inventor Takayuki Aoyagi 3-3 Higashi Ueno 3-chome, Taito-ku, Tokyo F-term (reference) 3J066 AA26 BA10 BB01 BB04 CA06

Claims (8)

[Claims] 1. A damper structure for damping the vibration of a structure (1) which is a damped body, wherein a damper member (10) is formed of a round bar having a circular cross section. A fixing side member (7) projecting one end in the longitudinal direction from the structure (1) in the lateral direction.
And a load projecting laterally from a base (4) constructed separately from the structure (1) at a portion separated from the one end in the longitudinal direction of the damper member (10). The member (11) is allowed to move in the longitudinal direction while restraining the movement in a direction perpendicular to the longitudinal direction, so that the longitudinal axis of the damper member (10) is aligned with the longitudinal axis of the structure. A damper structure for a structure, wherein a damper member (10) is provided so as to be parallel to the structure. 2. The damper structure according to claim 1, wherein the damper member is made of steel. 3. The damper structure according to claim 1, wherein the portion engaged with the load member is the other end of the damper member in the longitudinal direction. 4. The damper member according to claim 1, wherein the damper member is fixed to the fixing lateral member via a mounting ring having a width in the longitudinal direction. Damper structure. 5. The mounting ring according to claim 4, wherein a curved surface (9a) that opens outward is formed at an end of the inner surface of the mounting ring (9) that is in contact with the damper member (10) and is closer to the load member. Damper structure. 6. The load member (1) of the damper member (10).
The part separated from the part engaged in 1) is engaged with the supporting side member (8) projecting laterally from the structure (1) so as to be immovable in the lateral direction and movably in the longitudinal direction. The damper structure according to claim 1, wherein 7. A portion of the damper member (10) supported by the supporting side member (8) is an end opposite to an end fixed to the fixing side member (7), Member (1
7. The damper structure according to claim 6, wherein 0) is engaged with the load member (11) at an intermediate portion between the both ends. 8. An engaging portion of the supporting side member (8) with the damper member (10) is formed in a curved surface, and the supporting side member (8) is an external tangent line surrounding the damper member (10). The damper structure according to claim 6, wherein the damper member (10) is supported.