JPH11117572A - Composite base isolation (support and buffer, combined) device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb and attenuate vertical fluctuation and horizontal fluctuation of an earthquake and reduce propagation of earthquake waves by enclosing a spiral steel-made spring and a steel-made woven fabric in a columnar rubber body, and supporting an upper building by a composite base isolation device inserting an adjustment rod. SOLUTION: A circular spiral steel-made spring 44 and a cylindrical steel-made woven fabric 48 are enclosed in a solid columnar rubber body 46, the lower attaching board 24 of a composite base isolation device 22 drilling a plurality of adjustment rod insertion holes 30 is bolt-joined to a support foundation part 12, and an upper attaching board 38 is bolt-joined to the lower part of an upper building 20. An adjustment rod 28 extended from the support foundation part 12 is inserted in the adjustment rod insertion hole 30 to support the upper building 20. Thereby the vertical fluctuation of earthquake is absorbed and attenuated by the rubber body 46 and a steel-made spring 44, excessive deformation of the composite base isolation device 22 is prevented for horizontal fluctuation as the adjustment rod 28 is a buffer, and the steel-made woven fabric 48 prevents shearing and buckling of the columnar rubber body 46. Thus, the vertical fluctuation of an earthquake center part is effectively absorbed and attenuated and the horizontal fluctuation can be also absorbed and attenuated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel compound seismic isolation device which is free from vertical or horizontal motion due to seismic waves on buildings and structures and does not collapse or tilt when an earthquake occurs.

[0002]

2. Description of the Related Art As shown in FIG. 6, the structure of a conventional seismic isolation device is formed by laminating a disk-shaped metal disk 6 and a protective film disk 4 having the same diameter. Are alternately fixed with an adhesive to form a laminate, and a lower mounting plate 2 is provided at the lower end of the laminate.
4. An upper mounting plate 38 is provided at one upper end.

In addition to the seismic isolation device 2 described above, a device (generally referred to as a damper {hereinafter referred to as a shock absorber}) 50 for adjusting the seismic isolation effect shown in FIG. 4 is installed. The seismic structure is established and it becomes a seismically isolated building.

[0004] The conventional seismic isolation device 2 and the shock absorber 50 described above.
When an earthquake occurs in the area where the building with the building is built, the upper building is affected by the horizontal and vertical waves of the earthquake, and the effect of the seismic isolation device 2 and the shock absorber 50 is used. 8, the seismic isolation device 2 shown in FIG. At the time of this displacement, the height (thickness) of the cross-sectional shape of the protection board 4 of the seismic isolation device 2 is extremely small with respect to the width (diameter), and the shear deformation, not the bending deformation, is caused by horizontal displacement. In the worst case, it is assumed that the protective layer 4 is broken, and depending on the situation, the adhesive fixing surface 8 of the protective layer 4 and the metal plate 6 may be broken before the fracture.
Is likely to occur at the same time, and the laminate 2 itself may collapse.

The above-described conventional seismic isolation device 2 is displaced with respect to a vertical wave as shown in FIG. 6, but the displacement amount is H _{1 to} H _{2 to} H _{3, which} is very small compared to the horizontal wave, and The waves are hardly mitigated by the seismic isolation device 2 and directly affect the upper building 20. The upper building 20 follows the sway of the vertical wave and sways similarly, and the main structure of the main body of the building is seriously affected. Causes structural damage. Analysis of the past damage situation in the epicenter of the earthquake and related active faults shows that the damage caused by vertical waves (vertical sway) is enormous, and the damage such as collapse and collapse of buildings is concentrated, leading to vertical waves. Is urgently required, and it can be said that the response to vertical waves is a weak point (defect) for the conventional seismic isolation device 2.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional seismic isolation devices, and is intended to dramatically reduce the influence of seismic waves on buildings when an earthquake occurs. To provide a new device that can completely respond to horizontal waves (horizontal sway) without any catastrophic damage due to vertical waves (vertical sway) in the epicenter area and related active fault surrounding area, without buffer The purpose is to:

[0007]

In order to solve the above-mentioned problems, a compound seismic isolation device of the present invention is installed at the upper end of a support base portion of a building, and the building is constructed and installed at the upper end of the seismic isolation device. In the event of an earthquake, a columnar protection film as shown in FIGS. 1 and 2 comprising a columnar protection film as a main member and a circular spiral steel spout enclosed therein. The membrane and the circular spiral steel strip follow the vertical wave (vertical sway) of the seismic wave, respectively, absorb and diverge the seismic force as shown in FIG. 5, and apply to the building structure etc. by the direct hit of the seismic wave to the upper building. Damage is avoided.

[0008] In the above configuration, by enclosing (casting) a cylindrical steel woven fabric into the columnar protective film, abrupt deformation of the seismic isolation device due to horizontal and vertical seismic waves when an earthquake occurs. A seismic isolation device characterized by suppressing columnar protective membranes from being tuned to the frequency of seismic waves by the strong tension of steel woven fabric, adjusting the displacement cycle of the building, and suppressing the amplitude slightly. It is.

Due to the strong horizontal seismic wave at the time of the earthquake, the upper building is displaced to an extreme state from the position of the supporting ground in normal times and is forced to move left and right, and it is assumed that the seismic isolation device itself may be damaged. However, the steel adjusting rod 28 fixed to the support base portion 8 and vertically inserted into the seismic isolation device 22 is displaced to an extreme state, and the displacement of the seismic isolation device which is forced to move left and right is made of steel. It has the feature of suppressing and controlling by the rigidity of the adjusting rod, and finally controlling and controlling the displacement of the upper building. The range of the effect is naturally 360 degrees omnidirectional since the installation condition is perpendicular to the horizontal plane. Demonstrate its function.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing the structure of a compound seismic isolation device according to the present invention. In FIG. 1, the same or similar parts and members as those in FIGS. 2 to 7 are described using the same reference numerals.

FIG. 3 is a perspective view showing a building in which the compound seismic isolation device according to the present invention is introduced.

In FIG. 3, an upper building 20 is a seismic isolation structure building according to the present invention. The support base part 12 has a square support base beam 16. The supporting foundation beam 16 is integrated with the pressure plate 14, and the structure is a reinforced concrete structure.

In FIG. 3, reference numeral 22 denotes a combined seismic isolation device of the present invention. The support base portion 12 has an appropriate strength and scale calculated individually by a structural calculation based on the Building Standard Law of the upper building 20, and this figure shows a general example. Composite seismic isolation device 22
The diameter and height of the outer shape, various dimensions of the other components of the seismic isolation device, and the number of used and installed positions of the seismic isolation device 22 are determined based on the structural calculation.

In FIG. 2, the upper end portion 1 of the support base portion 12 is shown.
Numeral 8 is constructed to be at least 30 cm higher than the ground around the construction site of the upper building 20 to prevent inflow of rainwater or the like and to prevent the composite seismic isolation device 22 from being soiled.

In FIG. 2, the seismic isolation structure building according to the present invention is composed of a support base portion 12, a composite seismic isolation device 22, and an upper building 20.

Here, a general construction method of the seismic isolation structure building according to the present invention will be described with reference to FIGS.
After confirming that the ground strength (ground strength) of the building site of the seismic isolation structure building conforms to the structural design strength (in the case of non-compliance, it is corrected by the pile foundation, etc.), it is dug down to the supporting ground surface of the pressure plate 14. (Excavation), rebar construction of the pressure-resistant panel 14, and continuous concrete placement. After the pressure plate 14 is completed, the construction of the supporting foundation beam 16 is started. At this time, the compound seismic isolation device 2
2 mounting bolts 2 for mounting and fixing to the supporting foundation beam 16
6 and the adjusting rod 28 are temporarily fixed to the installation position of the composite seismic isolation device 22 after confirming the accuracy in the horizontal and vertical directions respectively, and after the completion of the rebar construction of the supporting foundation beam 16, the concrete construction is carried out and a predetermined time after the completion. (Building Standards Law)
When the strength reaches the design strength, the mounting bolt 26 and the adjusting rod 28 are completely fixed to the support foundation beam 16.

After the concrete strength of the pressure-resistant panel 14 and the support base portion 12 reaches the design strength, the portion of the upper end portion 18 of the support base where the composite seismic isolation device 22 is installed is carefully cleaned. The level adjustment is carefully performed by using a high-strength mortar grout and a steel level spacer, etc., so that the installation setting level of the composite seismic isolation device 22 is uniformly finished in each place. In addition, the already-installed mounting bolts 26 and the adjusting rods 28 are protected to prevent damage due to the construction.

After the high-strength mortar grout reaches the design strength, the installation work of the composite seismic isolation device 22 of the present invention is started. After confirming whether the mounting bolts 26 and the adjusting rods 28 for the device projecting above the upper end portion 18 of the support base are damaged, and cleaning the adhered matter such as concrete, the lower mounting plate of the compound seismic isolation device 22. Adjustment rod insertion hole 30 drilled in 24
The lower end of the composite base isolation device 22 is carefully inserted into the adjustment rod insertion hole 30 while being aligned with the upper end of the adjustment rod 28 projecting above the upper end 18 of the support base, and gradually lowered. 24, while gradually lowering the upper end of the mounting bolt 26 protruding above the upper end 18 of the support base.
Adjustment surface 3 of lower mounting plate 24 and support base upper end 18
4 is adhered. After the descent, the nuts of the mounting bolts 26 at the upper end portion 18 of the support base are tightened, and the tightening torque is confirmed with a torque wrench or the like, and the mounting and fixing of the composite seismic isolation device 22 to the support base portion 12 are completed.

After the mounting and fixing of the composite seismic isolation device 22 to the support base 12 are completed, the construction of the upper building 20 is started.
FIGS. 1 and 2 both show a reinforced concrete structure as a general example. However, even in a structure such as a steel frame structure or a wooden structure, a composite or seismic isolation device 2 such as a base portion or a base portion of an upper building or the like.
The connection and fixation of the second mounting plate 38 with the upper mounting plate 38 are basically the same and are not shown. Prior to construction, the composite seismic isolation device 22 is wrapped with a curing protection sheet or the like in order to prevent soiling and damage during construction. The driving anchor-bolt 36 of the upper building 20 is inserted into the mounting hole 32 of the upper mounting panel 38 of the composite seismic isolation device 22, and after confirming each set level such as horizontal and vertical, it is temporarily fixed to the upper mounting panel 38.

After the anchor-bolt 36 has been temporarily fixed to the upper mounting board 38 of the combined seismic isolation device 22, the construction of the foundation 40 of the upper building 20 is started. After the construction of the base portion 40 is completed, it is confirmed that the portion has reached a predetermined strength. Then, the mounting nut 42 of the driving anchor-bolt 36 in the mounting hole 32 of the upper mounting plate 38 on the composite seismic isolator 22 side is tightened, and a torque wrench is used. The tightening torque is confirmed by the above method, and the attachment and fixation of the base portion 40 of the upper building 20 to the composite seismic isolation device 22 are completed. Building work is completed through a predetermined process, and the seismic isolation structure building according to the combined seismic isolation device 22 of the present invention is completed.

In the above example, the composite seismic isolation device 22 has a cylindrical shape, but the general shape may be another column shape such as a square pole shape.

In the above-described example, the spiral spiral steel ridges 44 are used. However, the shape may be a circular shape such as a square shape or the like, and the material may be steel or resin.

In the above example, the adjusting rod 28 is made of steel.
The material can be steel or resin.

In the above example, the lower and upper mounting plates 24 and 38 of the composite seismic isolation device 22 are joined and fixed to the steel ridges 44 by welding. However, a hook bolt fastening method or a screw-in method may be used.

When the location of the seismic isolation structure according to the present invention having the above configuration is in the epicenter of an earthquake or in the vicinity of an active fault, the vertical motion caused by the seismic wave accompanying the occurrence of the earthquake, and in the outer epicenter area, the horizontal motion; In addition, the seismic isolation effect is exerted on a composite wave (three-dimensional wave) of vertical and horizontal motions depending on the crustal condition, and this seismic isolation device is applicable to any seismic wave and any region. Among the seismic waves associated with the occurrence of the earthquake, the seismic isolation structure building and the displacement of the seismic isolation device due to the vertical wave are shown in FIG. 5 for the seismic isolation building according to the present invention, and in FIG. 6 for the conventional seismic isolation structure building. Is shown.

As shown in FIG. 5, when the supporting ground 10 (the stratum) of the seismic isolation structure building according to the present invention is displaced up and down by the seismic wave due to the occurrence of the earthquake, the supporting base portion 12 which is fixed to the supporting ground 10 is the same. Cause displacement. As a matter of course, the upper end portion 18 of the support base and the composite seismic isolation device 2 that is fixed thereto
The second lower mounting plate 24 also causes the same displacement. Support ground 1
0 to the support foundation 12, and further to the upper end 18 of the support foundation and the lower mounting board 24 of the composite seismic isolation device 22, the seismic force of the vertical motion due to the seismic wave is propagated, and the seismic force is transmitted through the composite seismic isolation device 22. Goes toward the upper building 20. Due to the elasticity of the steel bar 44 of the device and the compression of the cylindrical protective membrane 46,
The seismic force in the direction of the upper building 20 is absorbed and diverged and attenuated, and the seismic force transmitted to the upper building 20 is extremely small. No harm is done. Since the seismic force propagates very little to the upper building 20, the seismic force on the columns and beams of the structure is very small, so the dimensions of the columns and beams are smaller than those of the conventional seismic isolation structure. It reduces the size of the building and expands the building space. However, as shown in FIG. 6, the seismic isolation structure of the conventional seismic isolation device (laminated protective membrane type) does not attenuate the vertical seismic force propagation through the seismic isolation device 22 as shown in FIG. It is propagated in the direction of the building 20, and the upper building 20 is supposed to cause damage to the resident, the accommodations, etc., including the structure.

In the seismic isolation structure according to the present invention having the above structure in the epicenter outer peripheral area, the influence of the horizontal motion (horizontal shaking) by the seismic wave accompanying the earthquake is shown in FIG.
Absorbed by the elastic deformation of No. 4 and the respective displacements such as the compression of the columnar protective film 46, the propagation of the horizontal shaking energy to the upper building or the like is prevented, and the shaking of the building or the like due to the earthquake is revolutionary. As a result, the seismic energy applied to the main building structure is extremely small, so the design strength of the columns and beams is smaller than that of the building with the conventional laminated rubber type seismic isolation device.・ Because the beams become thinner, construction costs will be reduced and the building space will be larger.

The seismic isolation structure building according to the present invention having the above configuration is required for the seismic isolation structure building of the conventional seismic isolation device (laminated protective membrane type) by the operation of the adjusting rod 28 of the seismic isolation device. Combination with a shock absorber (damper) is not required, and the seismic isolation device of the present invention alone produces a seismic isolation effect. In addition, the shock absorber attached to the seismic isolation structure building related to the conventional laminated rubber type seismic isolation device is affected by the horizontal motion (horizontal vibration) due to the seismic wave caused by the earthquake due to the shape and material of the shock absorber main body. Although the form shows a displacement, the form gives an unnecessary rotational stress to the upper building due to the "torsional deformation" accompanied by rotation, and the occurrence of side effects of the building shake is assumed, but the seismic isolation structure building according to the present invention The objects are free of side-effect building shakes.

With the above structure, the seismic isolation structure building according to the composite seismic isolation device 22 in which the steel woven fabric 48 is enclosed in the cylindrical protective film body 46 of the present invention shown in FIG. At this time, horizontal stress acts on the foundation 40 due to the seismic energy of horizontal motion (horizontal shaking) accompanying the occurrence of the earthquake, and this stress propagates from the supporting foundation beam 16 to the seismic isolation device 22. As shown in FIG. 7, the apparatus 22 has a cylindrical protective film body 46 which takes advantage of the integral molding characteristic different from that of the laminated body to form a gently quadratic curve and a steel woven fabric 48.
No local buckling peculiar to the laminate occurs due to the sealing effect of the above, and the columnar protective film body 46 does not collapse or break at all. On the other hand, in the conventional seismic isolation device, as shown in FIG. 8, the thickness of a single protective plate 4 forming a laminate is significantly larger than the width (diameter) of the protective plate 4. Thin, horizontal motion due to earthquake (horizontal sway)
The seismic energy causes local discontinuous deformation of the displacement, and furthermore, since the laminated body is manufactured by alternately bonding and adhering the protective plate 4 and the metal plate 6 with an adhesive, the thin protective plate 4 is manufactured. The local buckling force is concentrated by the horizontal movement, and the thin protective film board 4 follows the horizontal displacement, and the main body of the protective film board 4 is broken or the adhesive film between the protective film board 4 and the metal plate 6 is separated. Due to detachment, it will not function as a seismic isolation device, and enormous damage to upper buildings will be assumed.

In the above-described embodiment, the middle-high-rise reinforced concrete building according to the present invention is exemplified and described. However, in the present invention, the structure of the upper building or the like is made of steel, wooden, block, or masonry. It goes without saying that the height of the building can be applied to all heights such as low-rise, middle-high-rise, and super-high-rise buildings.

[0032]

As described above, according to the seismic isolation structure of the composite seismic isolation device of the present invention, the building above the composite seismic isolation device is isolated and isolated from any shaking during an earthquake. And collapsing and collapse of structures (pillars, beams, walls, floors), damage to related facilities, functional impairment, and fall / fall of furniture and storage items such as indoor furniture such as buildings・
It makes it possible to have no accidents such as scattering, and has an epoch-making effect on the response to vertical motion seismic waves, a major cause in the epicenter (the epicenter), which causes unprecedented damage due to the earthquake.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the structure of a compound seismic isolation device of the present invention.

FIG. 2 is a detailed longitudinal sectional view of the combined seismic isolation device of the present invention.

FIG. 3 is a schematic perspective view of a seismic isolation structure building according to the present invention.

FIG. 4 is a schematic perspective view of a seismic isolation structure building according to a conventional laminated protective film type seismic isolation device.

FIG. 5 shows the state of displacement due to seismic waves and vertical motion (vertical sway) of the compound seismic isolation device such as the seismic isolation structure building according to the present invention when constructed in the epicenter (the epicenter) at the time of the earthquake. FIG. 2 is a schematic cross-sectional explanatory view and a conceptual table showing the same.

FIG. 6: Seismic wave of the laminated protective film type seismic isolation device such as a seismic isolation structure building related to the conventional laminated protective film type seismic isolation device when built in the epicenter (the epicenter) at the time of the earthquake It is a schematic sectional explanatory view and a conceptual table showing a state of displacement due to vertical movement (vertical swing).

FIG. 7 is a schematic diagram showing a state of displacement of the compound seismic isolation device such as the seismic isolation structure according to the present invention due to seismic waves and horizontal motion (horizontal shaking) when constructed in the epicenter outer peripheral area at the time of the earthquake. It is sectional explanatory drawing and a conceptual table.

FIG. 8 is a schematic diagram showing the state of displacement of the compound seismic isolation device such as the seismic isolation structure according to the present invention due to seismic waves and horizontal motion (horizontal shaking) when it is built in the epicenter outer peripheral area when an earthquake occurs. It is an elevation explanatory view and a conceptual table.

[Explanation of symbols]

 2 Conventional Seismic Isolation Device 4 Protective Panel 6 Metal Board 8 Laminated Material Bonding Surface 10 Support Ground 12 Support Foundation Portion 14 Pressure-Proof Board 16 Support Foundation Beam 18 Support Foundation Top End 20 Upper Building 22 Composite Seismic Isolator 24 of the Present Invention 24 Lower mounting plate 26 Mounting bolt 28 Adjusting rod 30 Adjusting rod insertion hole 32 Mounting hole 34 Mounting adjustment surface 36 Driving anchor-bolt 38 Upper mounting plate 40 Base (base) part 42 Mounting nut 44 Steel strip 46 Columnar protective film 48 Steel woven fabric 50 Shock absorber

Claims (8)

[Claims] 1. An apparatus which is installed between a building and a supporting foundation portion of the building and an upper building main body, etc., and avoids the influence of an impact force due to a seismic wave upon occurrence of an earthquake on the upper building and the like. The conventional device has a cylindrical shape in its outline, and its configuration is a laminate made of a disk-shaped protective film with the same dimensions as a disk-shaped steel plate.
The steel plate and the protective film are formed in a laminated shape using an adhesive. The composite seismic isolation device of the present invention is mainly composed of a steel beam and a protective soul, and the seismic isolation effect of the conventional device is remarkable even for "two-dimensional horizontal seismic waves". On the other hand, the apparatus according to the present invention is a compound seismic isolation apparatus characterized in that it produces a seismic isolation effect on all three-dimensional seismic waves such as "horizontal and vertical directions". 2. The compound seismic isolation device according to claim 1, wherein said device has a form in which a circular spiral steel beam is enclosed inside a cylindrical protective soul. 3. The apparatus according to claim 1, wherein a plurality of steel rods (hereinafter referred to as steel adjustment rods) are vertically and centrally provided along the splines at a central portion of the circular spiral steel spout enclosed in the cylindrical protective membrane. The composite seismic isolation device according to claim 1 or 2, wherein the composite seismic isolation device is configured by being inserted in a circular shape. 4. The method according to claim 1, wherein the circular spiral steel beam is fixed to a mounting plate below the seismic isolation device, and the steel adjusting rod is fixed to a support base. Composite seismic isolation device. 5. Conventional seismic isolation device (generally referred to as bearing)
The seismic isolation structure building was constructed by installing a function to adjust the seismic isolation effect separately from the main body of the device (generally referred to as a damper {buffer}) in another place. This compound seismic isolation device, which is composed of a steel steel beam, a steel adjustment rod, and a cylindrical protective membrane soul, has the function of adjusting the seismic isolation effect only with this device (generally referred to as a damper {buffer}). 5. The method according to claim 1, wherein:
The compound seismic isolation device according to any one of the above. 6. Since the conventional laminate device is made of a protective film and a steel plate, "horizontal shearing" and "vertical buckling" are expected to occur due to deformation due to seismic waves. In order to prevent the occurrence of "shearing" and "buckling", a cylindrical steel cloth is enclosed between the cylindrical protective membrane of this device and the circular spiral steel beam, and "horizontal shearing" and 6. The compound seismic isolation device according to claim 5, wherein the protective soul is protected from "vertical buckling". 7. The apparatus has the above-mentioned mounting plate at the upper and lower ends thereof, and the mounting plate and the circular helical steel bar are fixed by welding, or the mounting plate and the circular helical steel bar are fixed. The composite seismic isolation device according to any one of claims 1 to 6, wherein the composite seismic isolation device can be fixed with a fastener. 8. The mounting plates at the upper and lower ends of the apparatus are respectively fastened to a building, a support base portion of the building, an upper building main body, and the like by bolts. The bolts are embedded in the reinforcing concrete frame of the supporting base portion except for the mounting portion. The compound seismic isolation device according to any one of claims 1 to 7, wherein: