JP2001032368A - Energy absorption construction for column to beam jointing portion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide easy installation by fixing a part of steel rod to either a column or beam, arranging a steel rod projecting out from a part to the other of column or beam at a vacant place formed to the other and then filling lead or a visco-elasticity body therein. SOLUTION: Four energy absorbing structures 6 are respectively arranged up and down between each side face of columns 1 and 2 and between a downstairs beam 3 and an upstairs beam 4. In this case, one end portion 11 of the steel rod 13 is embedded in the column 1 and fixed, and the portion projecting out from one end portion 11 to the beam 4 is arranged with a gap to the beam 4 in a recess 12 formed in the beam 4. Also, the recess 12 is filled up with lead by surrounding the steel rod 13. Other energy absorbing structures 6 are also formed in the same manner. When vibration occurs in a horizontal direction H1 due to earthquake, the steel rod 13 has a displacement relative to a beam 4 inside the recess, a plastic flow occurs to the lead 14 by such displacement, and vibration energy is absorbed by the plastic flow of the lead 14. Thereby, even though the energy absorbing ability per one is reduced, a large energy absorbing ability can be realized as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a high-rise office building,
The present invention relates to an energy absorbing structure at a joint between a column and a beam of a structure such as an apartment house or a detached house.

[0002]

SUMMARY OF THE INVENTION In order to make structures such as high-rise office buildings, apartment houses and detached houses flexible, and to attenuate the rolling caused by an earthquake or the like as early as possible, these structures are used. Various proposals have been made for an object to have a vibration damping structure.

[0003] As a proposal, a vibration damping device is arranged on the wall of a structure, and the vibration damping device absorbs the rolling energy of the upper floor beam relative to the lower floor beam to reduce the rolling of the structure. There is a so-called damping wall that attenuates as soon as possible.

[0004] In the case of a damping wall, if the wall thickness can be made relatively large, it is not so difficult to install the same. However, if the wall thickness cannot be made thicker, the installation becomes difficult. In addition, although the damping wall is preferable for absorbing the rolling energy, since the interior of the decorative wall plate becomes like a cavity, there is a possibility that the strength of the structure is reduced.

[0005] In addition to the damping wall, a damper device such as a steel rod damper is disposed between the floor slab of the structure and the foundation in order to attenuate the roll of the structure due to an earthquake or the like as early as possible. A technique has also been proposed, but in this technique, the absorption of the roll energy between the floor slab and the foundation, in other words, the centralized roll energy absorption, Requires a large energy absorption capacity, and therefore must be large, and handling is troublesome.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a room space for a structure as desired and to be able to disperse and dispose the structure throughout the structure. Another object of the present invention is to provide an energy absorbing structure of a beam-column joint which can exhibit a large energy absorbing ability as a whole even if the energy absorbing ability per unit is reduced, and is easy to install.

[0007]

According to the first aspect of the present invention, an energy absorbing structure at a joint between a column and a beam is partially embedded and fixed in one of the column and the beam. And projecting from the part toward the other of the column and the beam, and a steel rod disposed in a space formed in the other, and the space surrounding the steel rod is filled in the space. And lead or a viscoelastic body.

According to the energy absorbing structure of the column-beam joint of the first aspect, a part of the steel rod is embedded and fixed in one of the column and the beam, and the lead or the viscoelastic material is formed of the column and the beam. Since the space formed in the other of the above is filled, it can be installed without narrowing the room space of the structure, and can be distributed and disposed throughout the structure, and therefore, However, even if the energy absorption capacity is small, large energy absorption capacity can be exhibited as a whole, and in addition, installation is extremely easy.

The lead used in the present invention has a high purity, for example, a purity of 99.9 in order to absorb desired energy.
% Or more, and as the viscoelastic body, a viscoelastic body made of an epoxy-based polymer material, silicone gel or high-damping rubber can be mentioned as a preferable example.

In the energy absorbing structure for a beam-column joint according to the second aspect of the present invention, in the energy absorbing structure for a beam-column joint according to the first aspect, the other of the column and the beam is provided in a space. A communicating hole is further formed, and the steel rod is slidably mounted in the hole through the void.

[0011] According to the energy absorbing structure of the beam-column joint of the second aspect, the steel rod is slidably supported even in the hole, and the volume of the steel rod does not change in the void due to the earthquake. Therefore, in the relative vibration of the steel rod, plastic flow or viscous shear can be reliably generated in the lead or viscoelastic body densely filled in the void, and vibration energy absorption can be preferably achieved.

In order to absorb the change in the volume of the steel rod in the void space due to the earthquake, a viscoelastic body whose volume changes substantially by pressurization and decompression may be used.

According to a third aspect of the present invention, in the energy absorbing structure of a beam-column joint, the energy absorbing structure of the beam-column joint of the first or second aspect is embedded in the other of the column and the beam. A steel cylinder is further provided, and lead or a viscoelastic body is accommodated in the cylinder.

According to the energy absorbing structure of the beam-column joint of the third aspect, since the lead or the viscoelastic body is accommodated in the cylinder, the work of filling and accommodating the lead or the viscoelastic body becomes easy. , The lead or the viscoelastic body can be prevented from dissipating, and the lead or the viscoelastic body can be held at a predetermined position. The cylindrical body is not limited to a cylindrical shape, and may be a rectangular cylindrical shape such as a square, or any shape such as a truncated cone or a drum shape. In addition, the outer peripheral surface of the cylindrical body may be provided with irregularities so that the cylindrical body can be firmly held on the other of the column and the beam by the irregularities. It is more preferable that the outer peripheral surface side of the lead or the viscoelastic body is firmly held in the cylindrical body by being attached to the inner peripheral surface.

In the energy absorbing structure for a beam-column joint according to a fourth aspect of the present invention, in the energy absorbing structure for a beam-column joint according to the third aspect, both ends of the cylindrical body are closed by elastic bodies; The steel rod is slidably penetrated through the elastic body.

According to the energy absorbing structure of the beam-column joint of the fourth aspect, the lead or the viscoelastic body is prevented from dissipating similarly to or more than the energy absorbing structure of the beam-column joint of the third aspect. And the lead or viscoelastic body can be held in place for a long period of time. In addition, similar to the energy absorbing structure of the beam-column joint of the second aspect, the volume of the steel rod in the void in the earthquake can be increased. Since no change occurs, in the relative vibration of the steel rod, plastic flow or viscous shear can be reliably generated in the lead or viscoelastic material densely filled in the void, and vibration energy absorption is more preferably achieved. it can.

In the energy absorbing structure for a beam-column joint according to the fifth aspect of the present invention, in the energy absorbing structure for a beam-column joint according to any one of the first to fourth aspects, the steel rod may be made of lead or viscoelastic. It has an enormous part in the area surrounded by the body.

According to the energy absorbing structure of the beam-column joint of the fifth aspect, a large flow resistance can be generated in the lead or the viscoelastic body by the relative movement of the enormous portion in the void due to the earthquake. Sufficient vibration energy can be absorbed on the basis of the large flow resistance, and the vibration can be effectively and quickly attenuated as quickly as possible.

In the energy absorbing structure for a beam-column joint according to the sixth aspect of the present invention, in the energy absorbing structure for a beam-column joint according to any one of the first to fifth aspects, one end of the steel rod is connected to the column. Embedded and fixed, the other end of the steel rod is
It is located in the void formed in the beam.

According to the energy absorbing structure of the beam-column joint of the sixth aspect, a void is formed in the beam and one end of the steel rod is fixed to the pillar, so that the strength of the pillar is reduced by the void. Not
Therefore, in the structure having the energy absorbing structure of the present invention, it is not necessary to use a particularly strong thick pillar.

In the energy absorbing structure for a beam-column joint according to the seventh aspect of the present invention, in the energy absorbing structure for a beam-column joint according to any one of the first to fifth aspects, the intermediate portion of the steel rod is a column. Embedded and fixed, one end of the steel rod is
It is arranged in the void formed in the beam, and the other end of the steel rod is
It is arranged in a space formed in an adjacent beam sandwiching a column between the beam and the beam.

According to the energy absorbing structure of the beam-column joint of the seventh aspect, the intermediate portion of the steel rod can be firmly fixed,
Since both ends of the steel rod can be used for energy absorption, cost can be reduced and energy can be absorbed efficiently.

In the energy absorbing structure for a beam-column joint according to the eighth aspect of the present invention, in the energy absorbing structure for a beam-column joint according to any one of the first to fifth aspects, one end of the steel rod is connected to the beam. Embedded and fixed, the other end of the steel rod is
The steel bar is embedded and fixed in an adjacent beam sandwiching the column with the beam, and an intermediate portion of the steel bar is disposed in a space penetrating the column.

According to the energy absorbing structure of the beam-column joint of the eighth aspect, the steel rod has a double-supported structure, and the middle part of the steel rod is arranged in the space. Similarly to the energy absorbing structure of the beam-column joint of the embodiment, the volume of the steel rod does not change in the void due to the earthquake, and the vibration energy can be preferably absorbed.

In the energy absorbing structure for a beam-column joint according to the ninth aspect of the present invention, the void is filled with lead in the energy absorbing structure for a beam-column joint according to any of the first to eighth aspects. According to the energy absorbing structure of the beam-column joint of the tenth aspect of the present invention, in the energy absorbing structure of the beam-column joint of any one of the first to eighth aspects, the viscoelastic body is located in the void. Is filled.

When one end, the other end, or the intermediate portion of the steel bar is embedded and fixed in one of the column and the beam, the one end, the other end, or the intermediate portion of the steel bar is attached to the steel bar. A fixing flange-shaped locking member for preventing the slide-out and firmly fixing to the one side is attached by welding, screwing, caulking, or the like, and one end or the other end of the steel rod or the intermediate portion together with the locking member. It is good to embed a part in the one side.

According to the eleventh aspect of the present invention, in the energy absorbing structure of a beam-column joint of any one of the first to tenth aspects, the steel rod is a deformed steel rod. Consists of

In the energy absorbing structure of the beam-column joint of the eleventh aspect, similar to the energy absorbing structure of the beam-column joint of the fifth aspect, lead or viscoelasticity is obtained by relative movement in a space caused by an earthquake. Since a large flow resistance can be generated in the body, it is possible to sufficiently absorb vibration energy based on the large flow resistance, and it is possible to effectively and effectively attenuate the vibration as quickly as possible. In addition, it can be firmly fixed to one of the column and the beam.

In the present invention, the concrete constituting the columns or beams may be either precast-prestressed concrete (PCa-PC) or precast concrete (PCa-RC).

[0030]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a preferred embodiment of the present invention. In addition,
The present invention is not limited to these examples.

In FIG. 1 and FIG. 2, the lower side beam 3 and the upper side beam 4 made of PCa-PC are respectively provided on the side surfaces of the columns 1 and 2 made of PCa-PC adjacent to the high-rise office building as a structure. Are press-fitted and attached via a PC steel material 5 such as a PC steel wire or a PC steel rod in a prestressed state.
When the beams 3 and 4 are crimped and attached to the respective side surfaces of the columns 1 and 2 via the PC steel material 5 in a state where such prestress is given, the columns 1 and 2 and the beams 3 and 4 respectively The joint can be relatively flexible but strong, and is preferred in connection with the energy absorbing structure of the present invention.
It is needless to say that a plurality of PC steel materials 5 may be used as necessary.

In the present embodiment, four energy absorbing structures 6 at the joint between the column and the beam are arranged between each side surface of the column 1 and the lower and upper beams 3 and 4, respectively. Similarly, four upper and lower beams are arranged between each side surface of the pillar 2 and the lower beam 3 and the upper beam 4, respectively. Since any of the energy absorbing structures 6 is formed in the same manner, one of the energy absorbing structures 6 is further arranged between the pillar 1 and the upper beam 4 abutting on one side surface 7 of the pillar 1 in the upper beam 4. The energy absorbing structure 6 will be described in detail.

The energy absorbing structure 6 has one end 11 as a part embedded and fixed in one of the prismatic column 1 and the prismatic beam 4, in this example, the column 1. The other end of the column 1 and the beam 4, in this example, protruding from the one end 11 toward the beam 4, and a column-shaped recess 12 as a space formed in the beam 4 is formed with a gap with the beam 4. The steel bar 13 includes a round steel bar 13 and lead 14 that surrounds the steel bar 13 and fills the recess 12. In this example, the other end 15 of the steel bar 13 is located in the middle of the recess 12, and therefore, the steel bar 13 is cantilevered by the column 1. Note that the steel bar 13 may be a deformed steel bar instead of a round bar.

In the energy absorbing structure 6, the column 1 flexes and tilts due to the vibration in the horizontal direction H1 due to the earthquake, and when the beam 4 vibrates in the horizontal direction H1, the side surfaces 7 and 7
Sliding displacement occurs between the end surface 16 of the beam 4 and
As a result, the steel rod 13 is displaced relative to the beam 4 in the recess 12, and this displacement causes a plastic flow of the lead 14, and the plastic flow of the lead 14 causes the relative vibration energy of the column 1 to the beam 4. Will be absorbed.

Since the energy absorbing structure 6 is disposed between the pillar 1 and the beam 4, it can be installed without narrowing the room space of a structure such as a high-rise office building.
In addition, it can be distributed and arranged in the entire high-rise office building, and even if the energy absorption capacity per unit is reduced, a large energy absorption capacity can be exhibited as a whole.
Since it can be formed together with the formation and assembly of the beam 4 and the assembly, the installation is easy.
In order to fix one end 11 of the steel bar 13 to the column 1, the recess 1
2 does not cause the strength of the column 1 to decrease, and therefore, in a structure such as a high-rise office building equipped with the energy absorbing structure 6, it is not necessary to use a particularly strong and thick column 1.

In the energy absorbing structure 6, the lead 14 is filled and stored in the recess 12 formed in the beam 4 as it is, but a steel cylindrical body 21 is embedded in the beam 4 as shown in FIG. Alternatively, the lead 14 may be accommodated in the interior 22 of the cylindrical body 21 as an empty space. When the lead 14 is accommodated in the cylindrical body 21 in this way, the installation work of the lead 14 becomes easy, and the lead 4 beam 4
Can be prevented, and the lead 14 can be held at a predetermined position. In this example, a plurality of annular irregularities 24 and 25 are provided on the outer peripheral surface 23 of the cylindrical body 21, and the irregularities 24 and 2
5, the cylinder 21 is firmly fixed to the beam 4.

Further, as shown in FIG. 3, the other end 15 of the steel rod 13 may be slidably mounted in a round hole 26 formed in the beam 4. Are supported at both ends, and since the volume of the steel bar 13 does not change in the interior 22 due to the earthquake, the interior 22 is densely filled by the relative vibration of the steel bar 13 in the horizontal direction H1. Plastic flow can be reliably caused in the lead 14 which has
Vibration energy absorption can be preferably achieved. Both ends of the cylindrical body 21 shown in FIG. 3 are closed by elastic bodies 27 and 28 such as rubber plates as lid members, and the steel rod 13 is slidably penetrated through the elastic bodies 27 and 28. ing. In such a configuration, the leakage of the lead 14 can be more reliably prevented, and the lead 14
Is easily applied, and the elastic deformation of the elastic bodies 27 and 28 facilitates relative fluctuation of the steel rod 13 with respect to the beam 4 in the vertical direction V, which is preferable.

Further, as shown in FIG. 3, an enlarged portion 29 is formed in a portion of the steel rod 13 surrounded by the lead 14, and when the steel rod 13 is relatively vibrated in the horizontal direction H1 with respect to the beam 4, In this case, a large plastic flow resistance may be generated, and the vibration may be damped more quickly and effectively.

As shown in FIG. 3, a flange-shaped locking member 31 is attached to one end 11 of the steel rod 13 by welding, screwing, caulking, or the like, so that the column 1 of the one end 11 of the steel rod 13 Of the steel rod 13 is prevented from coming off.
You may make it be fixed firmly.

In the above description, an independent steel rod 13 is provided on each side of the column 1.
The energy absorbing structure 6 was formed by providing the intermediate portion 41 of the steel rod 13 instead of the pillar 1 as shown in FIG.
The steel rod 13 is fixed to the column 1 and
Is arranged in a recess 12 formed in the beam 4 on the side surface 42 facing the side surface 7, and the other end 15 of the steel rod 13 is
One steel rod 1 is arranged in the recess 12 formed in the beam 4 on the side surface 7 which is the adjacent beam sandwiching the column 1 between the beam 4 on the side surface 42 side.
Each energy absorbing structure 6 may be formed by sharing 3 with the two energy absorbing structures 6.

In the energy absorbing structure 6 shown in FIG. 4, the intermediate portion 41 of the steel rod 13 can be firmly fixed.
Can be used for energy absorption as a result, cost can be reduced, and energy can be efficiently absorbed.

Further, although the steel rod is cantilevered in the energy absorbing structure 6, the energy absorbing structure 6 may be constituted by supporting the steel rod 61 at both ends as shown in FIG. . That is, in the energy absorbing structure 6 shown in FIG. 5, one end 62 of the steel rod 61 is embedded and fixed in the beam 4 on the side surface 7 of the column 1, and the other end 63 of the steel rod 61 is
The intermediate portion 64 of the steel rod 61 is embedded and fixed in the adjacent beam 4 sandwiching the column 1 between the column 4 and the beam 4 on the side surface 7 side of the column 1.
The lead 14 is filled and accommodated in the through-hole 65 as a space passing through the through hole 65. The steel bar 61 is perpendicular to the steel bar 61 in the horizontal plane in the same manner as the steel bar 61.
6 may be provided and another vibration control device may be provided between the column 1 and the beam 4.

In the energy absorbing structure 6 shown in FIG. 5, the steel rod 61 is a double-supported structure, and the intermediate portion 64 of the steel rod 61 is disposed in the through hole 65. A volume change of the steel rod 61 in the through hole 65 does not occur during the earthquake, and vibration energy absorption can be preferably achieved.

In the above example, the recess 12 or the through hole 65 is filled with lead 14, but instead of the lead 14, a viscoelastic material is
2 may be filled and accommodated.

[0045]

According to the present invention, the room space of the structure can be desirably secured, and furthermore, it can be dispersed and arranged over the entire structure. As a result, it is possible to provide an energy absorbing structure of a beam-column joint that can exhibit a large energy absorbing ability and can be easily installed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an example of a preferred embodiment of the present invention.

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

FIG. 3 is a sectional view of another example of the preferred embodiment of the present invention.

FIG. 4 is a sectional view of still another example of the preferred embodiment of the present invention.

FIG. 5 is a sectional view of still another example of the preferred embodiment of the present invention.

[Explanation of symbols]

 1, 2 pillar 3, 4 beam 6 energy absorption structure of pillar-beam joint 12 recess 13 steel rod 14 lead

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumiya Osugi 2-1-2-22 Shiomi, Koto-ku, Tokyo Inside Kume Design Inc. (72) Inventor Keizo Tanabe 8--20-2 Nishishinjuku, Shinjuku-ku, Tokyo Kurosawa Construction Co., Ltd. (72) Inventor Ikuo Shimoda 1-3-2 Shiba-Daimon, Minato-ku, Tokyo Oil industry Co., Ltd. F-term (reference) 3J066 AA26 BA04 BB04 BC01 BD07 BG04

Claims (12)

[Claims] An energy absorbing structure at a joint between a column and a beam, a part of which is embedded and fixed in one of the column and the beam, and a part of the structure is connected to the column and the beam. A steel rod protruding toward the other of the beams and disposed in a cavity formed in the other of the beams; and a lead or viscoelastic body surrounding the steel rod and filling the cavity. Energy absorption structure of the beam-column joint. 2. The other of the column and the beam is further formed with a hole communicating with the cavity, and the steel rod passes through the cavity,
The energy absorbing structure for a beam-column joint according to claim 1, wherein the energy absorbing structure is slidably mounted in the hole. 3. The method according to claim 1, further comprising a steel cylinder embedded in the other of the column and the beam, wherein the cylinder contains lead or a viscoelastic body. Energy absorption structure at the beam-column joint. 4. The energy of a beam-column joint according to claim 3, wherein both ends of the cylindrical body are closed by an elastic body, and the steel rod is slidably penetrated through the elastic body. Absorbing structure. 5. The energy absorbing structure for a beam-column joint according to claim 1, wherein the steel rod has an enlarged portion in a portion surrounded by lead or a viscoelastic body. 6. The steel rod according to claim 1, wherein one end of the steel rod is embedded in and fixed to a pillar, and the other end of the steel rod is disposed in a space formed in the beam. The energy absorption structure of the beam-column joint section according to the paragraph. 7. An intermediate portion of a steel rod is embedded and fixed in a column, one end of the steel rod is disposed in a space formed in a beam, and the other end of the steel rod is The energy absorbing structure for a beam-column joint according to any one of claims 1 to 5, wherein the energy absorbing structure is arranged in a space formed in an adjacent beam sandwiching the column between the beam and the beam. 8. One end of a steel rod is embedded and fixed in a beam, and the other end of the steel rod is embedded and fixed in an adjacent beam sandwiching a column between the steel rod and the steel rod. The middle part of the rod is
The energy absorbing structure for a beam-column joint according to any one of claims 1 to 5, wherein the energy absorbing structure is arranged in a space penetrating the column. 9. The energy absorbing structure for a beam-column joint according to claim 1, wherein the space is filled with lead. 10. The energy absorbing structure for a beam-column joint according to claim 1, wherein the vacant space is filled with a viscoelastic body. 11. The energy absorbing structure for a beam-column joint according to claim 1, wherein the steel bar is formed of a deformed steel bar. 12. A structure such as a high-rise office building, an apartment house, a detached house, or the like, comprising the column-beam joint energy absorbing structure according to any one of claims 1 to 11.