JPH10169095A - Post with built-in aseismatic damper and rigid-frame structure skeleton with aseismatic post - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily repair damages after an earthquake by applying the constitution that an aseismatic post formed out of a steel web as a damper element having many slits, and a pair of steel flanges is combined with a support post for bearing a vertical load, so as to form a skeleton. SOLUTION: An aseismatic post 1 is made of a pair of right and left flanges 5 formed out of square tubes and a steel web 6 formed between the flanges 5. Furthermore, strip type joint plates 8 are integrally projected from the opposite surfaces of the flanges 5 formed out of two steel plates 9 having many laterally long slits 7 arranged in a vertical direction and the square tube along the vertical direction of the breadthwise center part of the web 6. Then, both breadthwise ends of each of the steel plates 9 are superposed via both upper and reverse sides of the joint plates 8. Thereafter, a high tension bolt 12 is inserted in the superposed part and tightened with a nut, thereby assembling the aseismatic post 1. According to this construction, only the web 6 gives plastic deformation, upon the occurrence of an earthquake, and the flanges 5 are not subjected to plastic deformation. Consequently, a repair work can be quickly executed by changing only the web 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002] The present invention relates to a column having a built-in seismic damper and a frame structure of a building including such a seismic column.

[0003]

2. Description of the Related Art Conventionally, a ramen structure and a brace structure have been used as means for absorbing seismic energy in a building.

[0004] Of these, the ramen structure absorbs ordinary seismic energy within the elasticity range of the structure, and always supports a load for the largest seismic energy exceeding it. It is made to absorb by plastic deformation of both ends of a beam or a column.

On the other hand, the brace structure absorbs ordinary seismic energy within the elastic range of the brace,
The largest seismic energy is also absorbed by the plastic deformation of the brace.

[0006]

In the above-mentioned conventional structure, in the case of the rigid frame structure, when energy of a large earthquake exceeding the elasticity range of the main structure acts, the beam or the column, which is the main structure, is plastically deformed and the energy is reduced. By absorbing, it is possible to avoid the collapse of the building and save human life. However, since the main structure that constantly supports loads is plastically deformed, it is difficult to reuse the structure after an earthquake, and it is supposed to be demolished. As a result, there is a disadvantage that the property value cannot be protected.

On the other hand, in the case of the brace structure, if the brace which does not always support a load against a large earthquake can be plasticized well as described above, repair can be easily performed as compared with the ramen structure and the property can be improved. Value is easy to maintain.
However, when the brace is arranged, the opening cannot be formed, so that the arrangement of the brace is restricted and the design becomes difficult. Further, the brace structure has a disadvantage that it has a low energy absorption capacity by itself.

The present invention solves the conventional drawbacks described above and has excellent seismic energy absorption capability, and can absorb the earthquake input energy at the time of a large earthquake without plastically deforming the main structure. Therefore, the purpose of the present invention is to realize pillar and building frame structures that can be easily repaired after an earthquake.

[0009]

In order to solve the above-mentioned problems, a pillar according to the present invention comprises a steel plate web as a damper element having a large number of slits and a pair of flanges made of a steel pipe. It is assumed that.

In the above, preferably, the web and the flange are joined by a high-strength bolt.

[0011] Similarly, it is preferable that a connecting plate is provided on the side surface of the flange along the longitudinal direction, and the end of the web is overlapped with the connecting plate and joined.

Further, it is conceivable that the web is composed of two steel plates superposed on both surfaces of the connecting plate.

At this time, a structure in which a joining plate for joining to a beam or a base is attached to the lower end of the flange is preferably used.

Further, preferably, a column base member having a small cross section is protruded from an end face of the flange toward an extension direction of the flange, and the joint plate is attached to a tip end of the column base member, and the joint plate is provided. And a rib plate between the flange ends.

Further, the frame structure of the present invention for solving the above-mentioned problems includes an earthquake-resistant column comprising a steel plate web as a damper element having a large number of slits and a pair of steel pipe flanges. It is characterized by comprising.

According to another frame structure of the present invention, a seismic column comprising a steel plate web as a damper element having a large number of slits and a pair of steel tube flanges, and a support column for supporting a vertical load are provided. It is characterized in that it is placed at key points.

In the above-described frame structure, preferably, a frame having a beam winning structure in which a beam penetrates each column in a horizontal direction is used.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a frame of a ramen structure in a building according to the present invention. In the figure
(1) A column with a built-in seismic damper (referred to as a seismic column),
(2) shows a support column. (3) is the base, (4)
(4)... Indicate beams. Seismic columns (1), base (3) and beams
The joint with (4) is a rigid joint, and both ends of the support column (2) are joined to the base (3) and the beam (4) by pin joining.
Moreover, the whole frame has a beam winning structure in which the beams (4) (4) ... penetrate in the horizontal direction, and therefore, the seismic column (1) and the supporting column (2)
The horizontal mounting positions can be freely moved, and they are arranged at necessary places so that an opening of an arbitrary size can be formed at a necessary place. The support column (2) is for supporting a vertical load.

FIG. 2 et seq. Show the structure of the above-mentioned seismic column (1) and its mounting structure. In the figures, (5) and (5) indicate a pair of left and right flanges made of a rectangular steel pipe, and (6) indicates a steel plate web attached between the flanges (5) and (5). The web (6) is composed of two steel plates (9) (9) formed by arranging a large number of horizontally long slits (7) (7) at the center in the width direction. Band-shaped connecting plates (8) (8) are integrally formed on opposite sides of the flanges (5) (5) made of rectangular steel pipes in the longitudinal direction, that is, along the vertical direction.

The steel plates (9) and (9) are overlapped at both ends in the width direction from the front and back surfaces of the connection plates (8) and (8), and the overlapping portions match each other. High strength bolts (12) (12) to formed bolt holes
And tighten the nuts (3) to
(9) Web (7) consisting of (9) and flange made of steel pipe (5)
The seismic column (1) that is integrated with (5) is assembled. A large number of high-strength bolts (12) are mounted at intervals in the vertical direction. As the flanges (5) and (5), a round steel pipe can be used.

As shown in FIGS. 2 and 3, the flanges (5) and (5) are shorter than the web (7), and have small cross-sections at both ends via a joining plate (13). A column base member (14) made of a shaped steel pipe projects in the extension direction of the flange (5). At the end of these column base members (14), a joining plate (15)
(15) are integrally fixed to each other, and further, between the joint plate (15) and the end plate (13), four rib plates (16) are formed on the outer peripheral portion of the column base member (14). It is fixed in a cross shape. The upper and lower ends of the rib plate (16) are joined to the end plate (13) or the joining plate (15). I have.

Each of the connecting plates 15 is rigidly connected to the corresponding surface of the base 3 and the beam 4 by means of a high-strength bolt 17. Both the base (3) and the beam (4) are H
It is made of shaped steel, and the joining plates (15) (15) are joined to the flange (18).

FIG. 5 shows a base at the lower end of the earthquake-resistant column (1).
This shows the joint structure between (3) and the foundation (20). The base (3) made of H-section steel is joined to the anchor bolt (22) of the foundation (20) at the lower flange (21). Have been.
(23) is a floor made of an ALC plate. The outer side of the base (3) is covered with a concrete block (25). The vertical load acting on the seismic column (1) is transmitted to the foundation (20) via the base (3). On the other hand, the bending moment from the first floor during the earthquake is absorbed by the base (3) and hardly transmitted to the foundation (20). (24) is an outer wall material.

In the above, the seismic column (1) is such that when ordinary seismic energy acts, the web (6) on which the slits (7) and (7) are formed is elastically deformed at the slit (7). When a large amount of energy at the time of a large earthquake acts, the slits 7 are plastically deformed, thereby preventing the flanges 5 and 5 from being plastically deformed. For this reason, the load of the building itself is
(5) Since the web is supported by the portion (5), the web is removed by removing the high-strength bolts (12) (12).
(6) Parts can be replaced and attached. Therefore, there is no need to demolish the building, and it is possible to quickly recover from such a large earthquake at a low cost.

The connection between the steel plates (9) and (9) and the flange (5) can be replaced by welding or the like instead of using the high-strength bolt (12). High strength bolts (12) are used.

[0026]

As described above, in the earthquake-resistant column of the present invention,
Absorbs seismic energy by deformation of the web with many slits formed, and in the event of a large earthquake, only the web part is plastically deformed and the flange side is not plastically deformed. Thus, disaster recovery can be performed quickly and with a minimum cost. Therefore, unlike the conventional building, the whole building is plastically deformed, and later, the building can be demolished.

Further, in the frame structure of the present invention,
The use of the above-mentioned seismic column has an effect that the disaster recovery in the event of an earthquake can be performed economically and quickly in the same manner.

At this time, by using the support columns in combination, it is possible to obtain an opening as large as possible while effectively supporting the load of the whole building. In addition, by using a beam winning structure, the degree of freedom in arranging the openings can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a frame structure of the present invention.

FIG. 2 is an overall side view of a mounting portion of a column having a seismic damper of the present invention.

FIG. 3 is an enlarged side view of the main part.

FIG. 4 is a cross-sectional view of a main part of the earthquake-resistant column of the present invention.

FIG. 5 is a longitudinal sectional view of a joint between a seismic column and a foundation and a foundation.

[Explanation of symbols]

 (1) Seismic column (2) Support column (3) Base (4) Beam (5) Flange (6) Web (7) Slit (8) Connection plate (9) Steel plate (12) High strength bolt (14) Column base Parts (15) Connecting plate

Claims (9)

[Claims] 1. A column with a built-in seismic damper, comprising a steel plate web as a damper element having a number of slits and a pair of flanges made of a steel pipe. 2. The column according to claim 1, wherein the web and the flange are joined by a high-strength bolt. 3. A connecting plate protruding from a side surface of the flange along a longitudinal direction thereof, and an end of the web is overlapped and joined to the connecting plate.
A column with a built-in seismic damper described. 4. The pillar according to claim 3, wherein the web is made of two steel plates stacked on both surfaces of the connecting plate. 5. A column incorporating a seismic damper according to claim 1, wherein a joint plate for joining to a beam or a base is attached to a lower end of the flange. 6. A column base member having a small cross section is protruded from an end face of the flange toward an extension direction of the flange, and the joining plate is attached to a tip end of the column base member. 6. A column with a built-in earthquake-resistant damper according to claim 5, wherein a rib plate is attached between the portions. 7. A frame structure with a seismic column, comprising a seismic column comprising a steel plate web as a damper element having a number of slits and a pair of flanges made of a steel pipe. . 8. A seismic column consisting of a steel plate web as a damper element having a number of slits and a pair of steel pipe flanges, and a support column for supporting a vertical load are arranged at essential places. Characteristic ramen frame. 9. The frame structure according to claim 7, wherein each of the columns has a beam winning structure in which a beam penetrates in a horizontal direction.