JP3533301B2 - A frame with a built-in seismic damper and a frame with seismic columns - Google Patents

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 frame structure of a building including such a seismic resistant 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.

Of these, the ramen structure absorbs normal seismic energy within the elastic range of the structure, and always supports the load for the maximum seismic energy exceeding it. It is designed to be absorbed by plastic deformation of both ends of the beam or columns.

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

[0006]

In the above-mentioned conventional structure, in the rigid frame structure, when the energy of a large earthquake exceeding the elastic range of the main structure acts, the beam or column which is the main structure is plastically deformed to reduce the energy. By absorbing it, it is possible to avoid the collapse of buildings and protect human lives. However, since the main structure that constantly supports the load is plastically deformed, it is difficult to reuse after the earthquake, and it is premised on being demolished, and as a result, there is a disadvantage that the property value cannot be protected.

On the other hand, in the brace structure, if the brace that does not always support the load against a large earthquake can be plasticized as described above, it can be repaired more easily than the ramen structure, and it is economical. Value is easy to maintain.
However, when the brace is arranged, the opening cannot be taken, so that the design is difficult due to restrictions on the arrangement of the brace. Further, the brace structure has a drawback that it has a low energy absorption capacity.

The present invention eliminates the above-mentioned conventional drawbacks, has an excellent ability to absorb earthquake energy, and can absorb the earthquake input energy during a large earthquake without plastically deforming the main structure. Therefore, the purpose was to realize a frame structure of columns and buildings that can be easily repaired after an earthquake.

[0009]

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

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

Similarly, it is desirable that a connecting plate is provided so as to project from the side surface of the flange along the longitudinal direction, and the end portion of the web is overlapped and joined to the connecting plate.

Further, the web may be composed of two steel plates laminated on both sides of the connecting plate.

At this time, a flange having a lower end to which a joint plate for joining to a beam or a base is attached is preferably used.

Further preferably, a column base member having a small cross section is projected from the end surface of the flange in the extension direction of the flange, the joint plate is attached to the tip of the column base member, and the joint plate is mounted. And a rib plate attached between the flange ends.

The frame frame of the present invention for solving the above-mentioned problems includes a seismic resistant column composed of 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 being configured.

Another frame frame structure of the present invention comprises a seismic resistant column composed of a steel plate web as a damper element having a large number of slits and a pair of steel pipe flanges, and a supporting column supporting a vertical load. It is characterized in that it is placed in a required place.

In the above-mentioned frame structure, preferably, a beam-winning structure in which a beam horizontally penetrates each column is used.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a frame structure of a rigid frame in a building of the present invention. In the figure
(1) is a column with a built-in seismic damper (called seismic column),
(2) shows the supporting columns. (3) is the base, (4)
(4) ... indicates a beam. Seismic columns (1) and foundations (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 joints.
Further, the entire frame has a beam-winning structure in which the beams (4) (4) ... Penetrate in the horizontal direction, and therefore the seismic-resistant column (1) and the supporting column (2)
The horizontal mounting positions of can be freely moved, and these can be arranged at required points so that openings of arbitrary sizes can be taken at required points. The support column (2) is for supporting a vertical load.

FIG. 2 and subsequent figures show the structure of the seismic resistant column (1) and its mounting structure. In the figure, (5) and (5) show a pair of left and right flanges made of a rectangular steel pipe, and (6) shows a steel plate web attached between these flanges (5) and (5). The web (6) is composed of two steel plates (9) (9) formed by arranging a number of laterally long slits (7) (7) ... Strip-shaped connecting plates (8) and (8) are integrally projectingly provided on opposing side surfaces of the flanges (5) and (5) made of rectangular steel pipes, respectively, in the longitudinal direction, that is, in the vertical direction.

Then, both ends of the steel plates (9) and (9) in the width direction are overlapped from both front and back sides of the connection plates (8) and (8), and at the overlapped parts, they are aligned with each other. High-strength bolts to the formed bolt holes (12) (12)
Insert and tighten the nut (3) to
(9) Web (7) consisting of (9) and flange (5) made of steel pipe
The earthquake-resistant column (1) that is integrated with (5) is assembled. A large number of high-strength bolts (12) (12) are attached at intervals in the vertical direction. It is also possible to use a round steel pipe for the flanges (5) (5).

As shown in FIGS. 2 and 3, the flanges (5) and (5) are shorter than the web (7), and both ends of the flanges (5) and (5) are rounded with a small cross section through the joint plates (13). A column base member (14) made of a shaped steel pipe is provided so as to project in the extension direction of the flange (5). At the tip of these column base members (14), join plate (15)
(15) are integrally fixed to each other, and further, four rib plates (16) are formed on the outer peripheral portion of the column base member (14) between the joint plate (15) and the end plate (13). 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), and the tip of one rib plate (16) is also joined to the end face of the connecting plate (8). There is.

The joint plates 15, 15 ... Are rigidly joined to the facing surfaces of the base 3 and the corresponding beam 4 by high-strength bolts 17, respectively. Both the base (3) and the beam (4) are H
It is made of shaped steel, and the joint plates (15), (15) ... Are joined to the flange (18) portion thereof.

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

In the above, the seismic resistant column (1) is such that the web (6) having the slits (7) and (7) is elastically deformed at the slit (7) portion when normal seismic energy is applied. The slits (7) are prevented from being plastically deformed by the plastic deformation of the slits (7) when they are absorbed by the strong energy during a large earthquake. Therefore, the load of the building itself is
(5) Since it is in a state of being supported by the portion (5), by removing the high-strength bolts (12) (12) ...
(6) Parts can be replaced and attached. Therefore, it is not necessary to demolish the building, and it is possible to quickly perform disaster recovery for such a large earthquake at low cost.

Incidentally, the connection between the steel plates (9) (9) and the flange (5) can be replaced by welding or the like instead of using the high-strength bolt (12), but it is preferable that such a connection is made. High strength bolts (12) are used.

[0026]

As described above, in the earthquake-resistant column of the present invention,
The seismic energy is absorbed by the deformation of the web with many slits, and in the event of a large earthquake, this web part only plastically deforms and the flange side does not plastically deform, so this web part only needs to be replaced. Thus, disaster recovery can be performed quickly and at a minimum cost. Therefore, unlike the conventional structure in which the entire building is plastically deformed and then demolished, a much more economical and rapid disaster recovery can be achieved.

Further, in the ramen structure frame of the present invention,
By using the seismic resistant column as described above, it is possible to obtain the effect that the disaster recovery in the event of an earthquake can be similarly performed economically and quickly.

In this case, by using the support pillars in combination, it is possible to effectively support the load of the entire building and to take as large an opening as possible. At the same time, the beam-winning structure can increase the degree of freedom in arranging the openings.

[Brief description of drawings]

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

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

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

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

FIG. 5 is a vertical cross-sectional view of the joint between the earthquake-resistant column and the base and the foundation.

[Explanation of symbols]

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

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04C 3/32 E04B 1/24 E04H 9/02 301

Claims (9)

(57) [Claims] 1. A column having a built-in seismic damper, comprising a web made of steel plate as a damper element having a large number of slits and a pair of flanges made of steel pipe. 2. The pillar having a built-in seismic damper according to claim 1, wherein the web and the flange are joined by a high-strength bolt. 3. The connecting plate is provided on the side surface of the flange so as to project in the longitudinal direction, and the end portion of the web is overlapped and joined to the connecting plate.
Pillar with built-in seismic damper as described. 4. The column with a built-in seismic damper according to claim 3, wherein the web is made of two steel plates stacked on both sides of the connecting plate. 5. A column having a built-in seismic damper according to any one of claims 1 to 4, wherein a joint plate for joining to a beam or a base is attached to the lower end of the flange. 6. A column base member having a small cross section is projected from the end face of the flange in the extension direction of the flange, the joint plate is attached to the tip of the column base member, and the joint plate and the flange end are attached. A column having a built-in seismic damper according to claim 5, wherein a rib plate is attached between the parts. 7. A frame structure having a seismic-resistant column, comprising a seismic-resistant column composed of a steel plate web as a damper element having a large number of slits and a pair of flanges made of steel pipe. . 8. 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, and a supporting column for supporting a vertical load are arranged at required points. A characteristic ramen structure skeleton. 9. The frame frame structure according to claim 7 or 8, wherein the beam has a beam-winning structure in which each beam penetrates horizontally in each column.