JP2000303718A - Connecting structure for base isolation building frame and its construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide connecting structure for a base isolation building frame capable of displaying a base isolation function perfectly by flexibly following movement at the time of earthquake, strong in secular distortion and maintenance-free for a long period of time and its construction method. SOLUTION: Connecting structure for this base isolation building frame is to arrange a gasket 3 on an upper surface of a building base part 1 and to bury a sliding member 5 on a lower surface of a base building frame 4 of an upper part base isolation building 2 to make contact with the gasket 3, and its construction is to fix the gasket 3 by a arranging a groove type member on the upper surface of the building base part 1, to set a formwork to construct the base building frame 4 on foundations of clearance setting members interposed on both sides of the gasket 3 thereafter, to arrange the sliding member 5 to make contact with the gasket 3 in a pressurizing state on the formwork and to deposit concrete of the base building frame 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jointed structure of a base-isolated building body in which a flexible member provided between a base of a base-isolated building and an upper base-isolated building is slidably set and its construction. About the method.

[0002]

2. Description of the Related Art In recent years, seismic isolation structures have often been adopted in buildings to avoid damages caused by shaking in daily life and vibrations caused by earthquakes. In many seismic isolation structures, the basic structure and the upper building are connected via seismic isolation devices, so it is common that the boundary is separated with a predetermined gap. is there. Therefore, seismic isolation building 30
Then, as shown in FIG. 4, the building base 31 in the seismic isolation layer
Butyl rubber 3 at the boundary between the upper seismic isolation building 32 and small animals such as rats, insects and water.
3 is performed.

However, butyl rubber has the following problems since it adheres to the upper and lower frames. Because of the lack of flexibility, butyl rubber cannot follow the movement of the skeleton during an earthquake. Resistance to the movement of the frame is generated and seismic isolation performance is impaired. There is a strong possibility that the rupture will occur during the first earthquake, and the ability to prevent inundation and insect invasion will not be maintained.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention has been devised in order to solve the above problems, and the seismic isolation function is flexibly followed by the movement during an earthquake. An object of the present invention is to provide a jointed structure of a seismic isolation building frame and a construction method which can be exhibited, is resistant to aging, and is maintenance-free for a long period of time.

[0005]

The joint structure of a seismically isolated building frame according to the present invention basically has a flexible elastic member having a smooth upper end provided on the upper surface of a base of a building. The initial purpose is to adopt a gasket that protects the base as a flexible elastic member by burying a sliding member on the lower surface of the base frame of the upper seismic isolation building in contact. Have achieved.

Further, according to the method of constructing a skeleton joint of a base-isolated building according to the present invention, a groove-shaped member having rising portions at both ends is provided on the upper surface of a building base, and then a gasket is inserted into a groove of the groove-shaped member. To form a building base, and then form a formwork for constructing the base frame based on the gap setting members interposed on both sides of the gasket, and then press the gasket in a pressed state. After placing the sliding members in contact with the formwork, the concrete of the base frame is poured in and the formwork is removed after predetermined curing, so that the joint structure of the seismic isolation building frame can be slid. Building.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The joint structure of a seismic isolation building frame according to the present invention basically comprises a flexible elastic member having a smooth upper end disposed on the upper surface of a base of a building and an upper portion contacting the flexible elastic member. It consists of a sliding member buried under the base frame of the base-isolated building, and a gasket is used as a specific flexible elastic member to flexibly follow the movement during an earthquake. Can be fully demonstrated. An embodiment will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a joint structure of a base-isolated building frame according to the present invention. In the figure, 1 is a base part of a base-isolated building, and 2 is an upper base-isolated building. A gasket 3 is provided on the upper surface of the base portion 1, and a sliding member 5 that is in contact with the gasket 3 is embedded on a lower surface of the base frame 4 of the upper seismic isolation building 2.

On the upper surface 6 of the base 1, a groove-shaped member 7 is laid for disposing the gasket 3. Base 1
A sealing material is applied between the upper surface 6 and the groove-shaped member 7 to improve the adhesion between the members to prevent water from entering.

Since the gasket 3 is fixed to the inside of the channel member 7 by applying a sealing material, the gasket 3 is protected by being sandwiched between the rising portions of the channel member 7. Therefore, even if a horizontal force is applied, it can withstand without causing unnecessary deformation.

An upper seismic isolation building 2 constructed with a predetermined gap from the base 1 has a sliding member 5 embedded in the lower surface of a base frame 4 of the building. It is composed of a metal plate provided with folded portions 9 and 9 at both ends of the surface 8, and while the folded portion 9 is in close contact with the base frame 4 to prevent falling off,
The sliding surface 8 is in contact with the gasket 3.

Although the gasket 3 is pressed by the sliding member 5 and deformed flat, the gasket 3 can smoothly slide on the sliding surface 8 of the sliding member 5, so that it can flexibly follow the movement during an earthquake. In addition to exerting the seismic isolation function, the pressed and deformed contact prevents invasion and inundation of small animals and insects.

Next, a method of constructing the skeleton joint according to the present invention will be described. FIG. 2 shows a process of disposing the gasket 3 on the upper surface 6 of the base 1 after the construction of the base 1 is completed. A curl plug 10 is buried and placed on the upper surface 6 of the base 1, and a sealing material is applied between the curl plug 10 and the upper surface 6, and a groove-shaped member 7 is provided. The groove-shaped member 7 is formed of plastic and has a groove shape having rising portions 11, 11 at both ends, and is fixed by stainless steel countersunk screws 12 screwed with the curl plug 10. The gasket 3 has a solid portion 13
A sealing material is applied around the solid portion 13 of the gasket, and is then pressed into the groove of the channel member 7 and fixed.

FIG. 3 is a partial sectional view of a formwork for constructing the base frame 4 of the upper seismic isolation building 2 in which the sliding member 5 is embedded on the lower surface. As shown, styrofoams 15 are arranged on both sides of the gasket 3 to set a predetermined gap between the base 1 and the base frame 4 of the upper seismic isolation building 2, and form 16 for constructing the base frame. Place.

Next, the sliding member 5 made of a metal plate is put on the gasket 3 and the sliding member 5 is pressed, so that the sliding member 5 is fixed to the mold while holding down the gasket 3. The fixing operation is performed by pressing the folded portion 9 of the sliding member 5 with the slab puller 17 and fixing the slab puller 17 to the fixing members 18 and 18 nailed to the formwork 16.

[0016] The concrete placement work thereafter is as usual, and concrete is placed before the concrete placement. In this case, if there is a concern that the sliding surface 8 may be lifted, it is also considered that a bar spacer (not shown) is arranged on the sliding surface 8 and pressed down with the weight of the reinforcing bar. is there.

After the predetermined curing, the styrofoam 15 and the mold 16 are removed, so that the gasket 3 is disposed on the upper surface of the base 1 and the lower surface of the base frame 4 supported with a predetermined gap. The construction in which the sliding member 5 in contact with the gasket 3 is embedded is completed.

According to this construction, the gasket 3 deforms the hollow portion 14 into a flat shape, but the solid portion 13 is protected by being sandwiched between the rising portions 11 of the groove-shaped member 7. The folded portion 9 of the member 5 also sufficiently adheres to the concrete of the base frame 4 to prevent falling off, so that the gasket 3 smoothly follows the movement at the time of the earthquake and smoothly slides on the sliding surface 8, The obstruction of the building without intrusion of insects or inundation has been established without disturbing the seismic isolation function.

As described above in detail with reference to the embodiments, the joint structure of a base-isolated building frame according to the present invention and the method of constructing the same have flexible elasticity at the boundary between the base and the upper base-isolated building. The members are arranged to enable smooth sliding, so they can flexibly follow the movement during an earthquake and exert their seismic isolation function without regret. State is established.

Although the present invention has been described in detail based on the embodiments, the joint structure of the base-isolated building frame according to the present invention basically has a smooth elastic flexible upper end on the upper surface of the building base. Since the sliding member is buried on the lower surface of the base frame of the upper seismic isolation building in which the member is disposed and abuts on the flexible elastic member, the structure is not limited to the above embodiment. Rather, various changes can be made without departing from the spirit of the invention.

[0021]

The joint structure of a seismic isolation building frame according to the present invention basically comprises a flexible elastic member having a smooth upper end disposed on the upper surface of a base of a building and an upper seismic isolation member abutting on the flexible elastic member. It is constructed by burying a sliding member on the lower surface of the base of the building. Specifically, it is characterized by adopting a gasket that protects the base as a flexible elastic member. In addition to flexibly following the seismic isolation function, it has the effect of being resistant to aging and establishing a maintenance-free state for a long time.

Further, according to the method of constructing a skeleton joint of a base-isolated building according to the present invention, a groove-shaped member having rising portions at both ends is arranged on the upper surface of a building base, and then a gasket is placed in the groove of the groove-shaped member. To form a building base, and then form a formwork for constructing the base frame based on the gap setting members interposed on both sides of the gasket, and then press the gasket in a pressed state. After placing the sliding members in contact with the formwork, the concrete of the base body is poured in, and the formwork is removed after predetermined curing. Has an effect of being able to smoothly construct the joint structure of the above.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a joint structure of a base-isolated building frame according to the present invention.

FIG. 2 is a cross-sectional view of a base showing a construction method of a skeleton joint according to the present invention.

FIG. 3 is a partial cross-sectional view of a base frame form showing a method of forming a frame joint according to the present invention.

FIG. 4 is a sectional view showing a joint structure of a conventional base-isolated building frame.

[Explanation of symbols]

1 base, 2 upper base isolated building, 3 gasket,
4 Base frame, 5 sliding members, 6 Upper surface of base,
7 groove type member, 8 sliding surface, 9 folded part, 10
Curl plug, 11 rising part, 12 countersunk screws,
13 Solid part of gasket, 14 Hollow part of gasket, 15 Styrofoam, 16 Formwork, 17
Slab pull, 18 fixing members, 30 base-isolated building, 3
1 building base, 32 base-isolated building, 33 butyl rubber,

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masanobu Sasaki 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Yuji Yasuoka 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Kazuhiko Tsunoda 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2D046 DA12 2E001 DA01 DG02 DH13 DH16 DH31 EA02 FA21 GA13 GA67 HA04 HB01 HB03 HE01 LA01 LA10 LA20 MA04

Claims (3)

[Claims] 1. A joint structure of a base-isolated building frame having a flexible member interposed between a building base and an upper base-isolated building. A joint structure for a base-isolated building frame, wherein a member is provided, and a sliding member is buried under the base frame of the upper base-isolated building abutting on the flexible elastic member. 2. The structure according to claim 1, wherein the flexible elastic member is a gasket that protects a base portion. 3. A method for constructing a skeleton joint of a base-isolated building in which a flexible member is interposed between the base of the building and the upper base-isolated building, wherein rising portions are provided at both ends on the upper surface of the base of the building. And a gasket is fixed in the groove of the groove member to form a building base, and then the base is formed on the basis of a gap setting member interposed on both sides of the gasket. Setting a mold for constructing the skeleton, then disposing a sliding member in contact with the gasket in a pressed state on the mold,
3. The method according to claim 2, wherein the concrete of the base frame is cast and the form is removed after predetermined curing.