JP2016084697A - Base-isolation structure for house, and wooden base-isolated house provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base-isolation structure of a simple configuration for readily base-isolating a house.SOLUTION: A base-isolation structure of a house H is installed on a ground G, and includes a foundation 11 having a foundation rising part 11a, an anchor bolt 14 having a leg part 14b embedded in the foundation rising part 11a, a sill 12 mounted on the foundation rising part 11a, a plurality of columns 13 erected on the sill 12, a cross-linking material 13a fitted between the plurality of columns 13, and a drum-shaped base-isolation member 15 fixed on the cross-linking material 13a and on a head part 14a of the anchor bolt 14 roughly at a center of the base-isolation member.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a base-isolated structure of a house and a wooden base-isolated house having the structure.

  In Japan, an earthquake-prone country, various earthquake countermeasures have been adopted, but the main earthquake countermeasures include earthquake resistance, seismic isolation, and seismic control. Seismic resistance refers to a construction that strongly reinforces the house so that the house does not collapse against seismic motion. Assuming that the ground motion is transmitted to the house, the pillars, beams, and walls can withstand that force. Reinforcement methods are taken.

  However, in the earthquake-resistant structure, even if it is possible to prevent the house itself from collapsing due to the earthquake motion, there is a risk that the furniture and electrical appliances inside the house may fall over and fall due to the shaking of the earthquake motion. As a result, the furniture may be destroyed or damaged, and the resident may be damaged by the furniture that has fallen or dropped.

  On the other hand, seismic isolation means the installation of a special base (seismic isolation bearing) that does not transmit earthquake motion on the foundation foundation of the house, and this seismic isolation support prevents the transmission of earthquake motion to the house. Although displacement occurs between the ground and the house, the shaking of the house can be greatly reduced. As described above, in the case of seismic isolation, the furniture or the like can be prevented from falling without requiring large-scale seismic reinforcement (see, for example, Patent Document 1).

  For this reason, it is desirable to perform seismic isolation not only for new houses but also for existing houses, but the conventional technology is effective for rolling, but often not effective for pitching, There was a problem that it was difficult to exhibit the seismic isolation effect for both pitch and roll.

JP 2014-015829 A

  Therefore, in view of the above problems, the present invention provides a seismic isolation structure for a house capable of exerting a seismic isolation effect for both pitch and roll with a simple configuration, and a wooden seismic isolation house including the same. The purpose is to provide.

The present invention is grasped by the following composition in order to achieve the above-mentioned object.
(1) A seismic isolation structure for a house, which is installed on the ground and has a foundation rising part, an anchor bolt having a leg embedded in the foundation rising part, and placed on the foundation rising part A base, a plurality of pillars constructed on the foundation, a bridge member attached between the pillars, and a bridge member fixed to the bridge member and fixed to a head of the anchor bolt at a substantially center. And a seismic isolation member.

(2) In the configuration of (1) above, the seismic isolation member may be composed of a single coil spring.

(3) In the configuration of (1), the seismic isolation member may be composed of two conical coil springs that are combined so that their upper bases face each other.

(4) In the configuration according to any one of (1) to (3), the seismic isolation member further includes another conical coil spring that is combined at the lower end thereof so that the bottoms of each other face each other. You may have.

(5) In any one of the constitutions (1) to (4), the seismic isolation member may be covered with a covering rubber.

(6) In the configuration of any one of (1) to (5), a bearing mechanism may be further provided between the base and the foundation rising portion.

(7) In the configuration of (6), the bearing mechanism may have a double bearing structure.

(8) A wooden base-isolated house having the base-isolated structure of any one of the above (1) to (7).

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide a seismic isolation structure for a house that can exhibit a seismic isolation effect for both pitch and roll with a simple configuration, and a wooden seismic isolation house including the same.

It is the figure which looked at the base isolation structure which concerns on 1st Embodiment of this invention from the direction orthogonal to the extension direction of a foundation standing part. Similarly, it is the enlarged view seen from the direction parallel to the extension direction of a foundation standing part. Similarly, it is a figure which shows the example which arrange | positions an anchor bolt to the foundation of a house. It is a figure which expands and shows the principal part of FIG. It is a figure which shows the principal part of the seismic isolation structure which concerns on 2nd Embodiment of this invention corresponding to FIG. Similarly, it is the figure which looked at the extending direction of a base from upper direction. It is a figure which shows the modification of 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

<First Embodiment>
The seismic isolation structure 10 of the house H which concerns on 1st Embodiment of this invention is demonstrated with reference to drawings. In addition, since the case where it is wooden as the house H is taken up and demonstrated below, the house H returns to the wooden seismic isolation house provided with the seismic isolation structure 10. FIG.

  In addition, 1st Embodiment is a form described in Japanese Patent Application No. 2014-232140 used as the foundation of the domestic priority claim of this application, The content described in the "detailed explanation of the invention" of the said basic application is as follows. is there.

“When we lift a foundation with a solid foundation of 30 tsubo or a wooden house, we need 30 tons of hydraulic jack per place. In the same state, we need a hydraulic jack to lift up from the base. 4 tons lifted lightly. "

“When the same pressure is applied from the same direction, the lighter weight is farther than the heavier one. When the base is not fixed with anchor bolts, naturally the upper side of the base jumps higher than the lower side. So, without fixing the anchor bolts, I thought of a way to kill forces in all directions and keep the building anchored to the foundation. "

“In addition, a round protrusion was added to the upper part of the conventional basic packing to reduce the friction of the building. This time, the pillar is 2 × 6 and the diameter of the roll absorbing hole is assumed to be 80 mm. If you use the diameter, it will also absorb more. "

  Further, the contents described in “Simple Description of Drawings” of the basic application are as follows.

  Regarding FIG. 1 (similar to FIG. 1 of the present application), “In order to make the weight of the upper and the foundation more clear, the foundation rises and the solid foundation has a resistance of 200 mm, and the pile increases the resistance.”

  Regarding Fig. 2 (similar to Fig. 2 of the present application), "Development of anchor bolt and trapezoidal spring. Anchor bolt pitch is 1300 mm or less, foundation packing is fixed to the upper part of the foundation for lateral sliding, and a stainless steel plate is trapezoided to the lower part of the base. Both springs are fixed with countersunk screws, and by fixing the upper part of the anchor bolt and the center part of the two trapezoidal springs, it is possible to absorb the thrust and roll from the basement. "

  Regarding FIG. 3 (similar to FIG. 3 of the present application), “the position of the anchor bolt of the 1F portion of the total 30 tsubo, the position and number of the foundation packing, and the corner foundation for further integrating the foundation.”

  Regarding FIG. 4 (similar to FIG. 4 of the present application), “an enlarged view of anchor bolts and trapezoidal springs, which are important parts of this theme”.

  Regarding FIG. 5 (omitted in the present application), “absorption of roll is caused by distortion of the spring, and absorption of pitch is absorbed by the contraction of the spring.”

  In making the above contents the first embodiment of the present application, the following will be described again with reference to FIGS. 1 to 4 of the present application. This description does not add any new matter to the form described in the basic application.

  Drawing 1 is a figure which looked at seismic isolation structure 10 of house H concerning a 1st embodiment from the direction orthogonal to the extension direction of foundation rise part 11a mentioned below. The house H is, for example, a wooden house. It may be an existing house or a new house to be built in the future.

  As shown in FIG. 1, the seismic isolation structure 10 of the house H according to the first embodiment includes a foundation 11 having a foundation rising part 11 a and a leg part 14 b embedded in the foundation rising part 11 a. An anchor bolt 14, a base 12 placed on the foundation rising portion 11 a, a plurality of columns 13, 13 constructed on the base 12, and a bridging material 13 a attached between the plurality of columns 13, 13 And a hook-shaped seismic isolation member 15 fixed to the bridging material 13a and fixed to the head 14a of the anchor bolt 14 at a substantially central position.

  Here, the head 14a of the anchor bolt 14 is inserted into a through hole 12a penetrating the base 12 so as to be swingable with respect to the base 12, that is, in order to absorb the roll. Normally, the head 14a of the anchor bolt 14 penetrates the base 12 in a dense state for earthquake resistance, but in the first embodiment, it can swing laterally in the through hole 12a. As described above, the base 12 is provided in a free state. The diameter of the through hole 12a can be set to, for example, 80 mm with respect to a general shaft diameter reference dimension (13 mm or more) of the anchor bolt 14 when the base 12 is made of 2 × 6 materials. If the diameter of the through-hole 12a is made larger, the absorption power can be increased accordingly.

  In addition, in the house H, a floor 19 is stretched on the base 12, and a pile 18 is provided below the foundation 11. The thickness of the foundation 11 and the foundation rising part 11a is, for example, 200 mm, the weight below the foundation 11 is increased, and a pile (pile) 18 is provided below the foundation 11 to increase the resistance to the ground G. .

  Next, with reference to FIG.2 and FIG.4, the seismic isolation structure 10 is demonstrated. FIG. 2 is a view of the seismic isolation structure 10 of the house H according to the first embodiment from the direction parallel to the extending direction of the foundation rising portion 11a, and FIG. 4 is an enlarged view of the main part. . As shown in FIGS. 2 and 4, the seismic isolation member 15 is a zigzag coil spring and is fixed at its upper end to a bridging material 13 a attached between a plurality of columns 13, 13. In the approximate center, the head 14a of the anchor bolt 14 and the nut 141 are firmly connected, and the lower end thereof is fixed to the base 12. The base 12 is fixed by positioning the annular lower end of the seismic isolation member 15 so as to surround the through hole 12a of the base 12 and screw-fixing between the stainless plate 20 provided on the lower surface of the base 12.

  As the seismic isolation member 15, a single coiled coil spring may be used, or two conical coil springs are used with their upper base sides (smaller diameter sides) facing each other. May be. In addition, when the seismic isolation member 15 is viewed from the side or in a cross-sectional view, one zigzag shape appears as a combination of a lower trapezoid and an upper inverted trapezoid, and one conical shape appears as a trapezoid.

  A foundation packing 21 is fixed on the upper surface of the foundation rising portion 11 a in order to allow side slip, and the stainless steel plate 20 is placed on the foundation packing 21. Here, the friction of the house H can be further reduced by providing a round protrusion on the upper surface of the foundation packing 21.

  The arrangement of the seismic isolation member 15 can be performed, for example, as shown in FIG. FIG. 3 is a diagram showing an example in which the anchor bolts 14 are arranged on the foundation of the house H. The position of the anchor bolts 14 is indicated on the upper surface of the foundation rising portion 11a of the first floor portion of the total 30 tsubo. ing. Here, 45 anchor bolts 14 are provided. Of course, the number of anchor bolts 14 is arbitrarily determined according to the structure and size of the house H. The pitch when the anchor bolts 14 are arranged is preferably 1300 mm or less.

  With the above configuration, the seismic isolation structure 10 absorbs the pitching that is pushed up from the basement by moving the hook-shaped seismic isolation member 15 up and down when an earthquake occurs. The central part of the hook-shaped seismic isolation member 15 tightly coupled to the head 14a can absorb the roll.

Second Embodiment
Next, the seismic isolation structure 10 of the house H which concerns on 2nd Embodiment of this invention is demonstrated with reference to FIG.

  As shown in FIG. 5, the seismic isolation member 15 </ b> B according to the second embodiment is provided with another conical coil spring on the lower bottom of each of the spell-shaped seismic isolation members 15 of the first embodiment. Are the same as in the first embodiment. The other conical coil spring is disposed so as to be accommodated in a through hole 12 a provided in the base 12.

  With reference to FIG. 6, the state which attaches the seismic isolation member 15B (the seismic isolation member 15 is the same) to the base 12 is demonstrated. FIG. 6 is a view of the extending direction of the base 12 from above, and columns 13 and 13 are provided on the upper surface thereof, and anchor bolts 14 are provided therebetween. The seismic isolation member 15 </ b> B is fixed to the base 12 with a mounting screw 22 on the outer periphery thereof at a position centered on the anchor bolt 14. Here, the head 14a of the anchor bolt 14 is inserted into the through hole 12a penetrating the base 12 so as to be swingable with respect to the base 12, as in the first embodiment. In the embodiment, in order to obtain a larger absorption capacity, it is preferable that the diameter of the through hole 12a of the base 12 made of 2 × 6 material is, for example, 180 mm.

  By configuring in this way, the seismic isolation member 15B according to the second embodiment is obtained by adding a conical coil spring to the pinched coil spring, and a through-hole 12a having a larger diameter on the base 12, By disposing the seismic isolation member 15B composed of a coil spring of a larger size, it is possible to increase the absorption capacity for pitching, rolling, and both, and it is possible to cope with larger earthquake motion.

<Modification>
The following deformation | transformation can be added with respect to the seismic isolation structure 10 of above-described 1st Embodiment and 2nd Embodiment. As a first modification, the seismic isolation member 15 and the seismic isolation member 15B may be covered with the covering rubber 16. FIG. 7A shows a case where the seismic isolation member 15B is covered with the covering rubber 16, and in order from the top, the first inverted conical coil spring 15B1, the second conical coil spring 15B2, 3 is covered with a covering rubber 16. Of course, the seismic isolation member 15 can be similarly covered with the covering rubber 16. By covering with the covering rubber 16, it becomes possible to cope with a larger earthquake motion, and the vibration of the seismic isolation member 15 or 15 </ b> B is braked to facilitate the restoration.

  As a second modification, instead of the foundation packing 21, as shown in FIG. 7A, the bearing mechanism 17 may be provided on the foundation rising portion 11a. On the bearing mechanism 17, the stainless steel plate 20 provided on the lower surface of the base 12 is positioned. As the bearing mechanism 17, as shown in FIG.7 (b), the double bearing structure provided with the 1st bearing 17b and the 2nd bearing 17c can be used suitably for the main body 17a. By providing the bearing mechanism 17, it is possible to promote the propagation of the rolling of the foundation 11 to the house H.

  Although the embodiment and the modified examples have been specifically described above, the present invention is not limited to the above-described embodiment and the like, and includes various modifications. It will be clear to the person skilled in the art from the description of the scope of claims. For example, it is also possible to apply the seismic isolation structure 10 by constructing the house H with a lightweight steel structure, a reinforced concrete structure, or the like instead of a wooden structure.

DESCRIPTION OF SYMBOLS 10 ... Base-isolation structure 11 ... Foundation 11a ... Foundation rising part 12 ... Base 12a ... Through hole 13 ... Column 13a ... Bridge material 14 ... Anchor bolt 14a ... Head 14b ... Leg part 141 ... Nuts 15, 15B ... Seismic isolation member ( coil spring)
16 ... Coated rubber 17 ... Bearing mechanism 18 ... Pile
19 ... Floor 20 ... Stainless steel plate 21 ... Foundation packing 22 ... Mounting screw H ... House G ... Ground

Claims (8)

The seismic isolation structure of the house
A foundation installed on the ground and having a foundation rising part;
Anchor bolts having legs embedded in the foundation rising part,
A foundation placed on the foundation rising portion;
A plurality of pillars built on the foundation;
A bridging material attached between the plurality of pillars;
A seismic isolation member having a hook shape, which is fixed to the bridging material and fixed to the head of the anchor bolt at substantially the center.   2. The seismic isolation structure for a house according to claim 1, wherein the seismic isolation member is composed of a single coil spring.   2. The seismic isolation structure for a house according to claim 1, wherein the seismic isolation member is composed of two conical coil springs combined so that their upper bases face each other.   The said seismic isolation member further has another conical coil spring combined with the lower end of the seismic isolation member so that the bottoms of each other face each other. Seismic isolation structure of the house.   The seismic isolation structure for a house according to any one of claims 1 to 4, wherein the seismic isolation member is covered with a covering rubber.   Furthermore, it has a bearing mechanism between the said foundation and the said foundation standing part, The seismic isolation structure of the house of any one of Claim 1 to 5 characterized by the above-mentioned.   The base isolation structure according to claim 6, wherein the bearing mechanism has a double bearing structure.   A wooden base-isolated house provided with the base base isolation structure according to any one of claims 1 to 7.

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