JP2001207675A - Damping construction method incorporating damping structure and damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily secure a position for arranging a damping structure by incorporating the damping structure in a stair portion though conventionally various restrictions are imposed in the phase of architectural planning by providing a wall-shaped damping structure for the whole of the plane of structure and thus is has been difficult to secure a wall-shaped plane of structure for attaching the damping structure. SOLUTION: In order to solve the problem, a damping device is arranged astride between landings at the rear surface side and between adjacent landings formed at both the end portions of the stair as a characteristic of the construction method for the damping construction having built-in damping structures and damping devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control structure for a building, and more particularly to a vibration control structure and a vibration control device incorporating a vibration control device for absorbing vibration due to an earthquake, a strong wind, or the like at a stair portion of the structure. It is about the method of building earthquake.

[0002]

2. Description of the Related Art In terms of structural design of structures, seismic resistant structures, seismic isolation structures, vibration control structures, and the like have been introduced as seismic designs. Examples of the earthquake-resistant structure include a strength resistance type using an elastic design method and a hysteresis damping type using an elasto-plastic design method. Examples of the seismic isolation structure include a flexible base structure using laminated rubber and a mechanical insulation method such as a sliding type isolator. Further, as a vibration control structure, there are an energy absorption type, a mass effect utilization type, an active vibration control type, and the like.

[0003] As described above, various means have been adopted as seismic design methods, and various structures have been adopted according to their characteristics. Furthermore, in recent years, as a vibration absorbing material for absorbing vibration, a sandwich type vibration damping steel plate in which a resin having high damping performance is sandwiched between two or more steel plates, or an alloy capable of absorbing high vibration energy as a metal material alone has been developed. We use damping alloys as damping materials. And, as a place for disposing the vibration absorbing material, a vibration damping device is mounted in a structure constituted by columns and beams of a building, and the structure on which the vibration damping device is mounted is a structure for mounting the vibration damping device and its mounting. The entire structure was finished in the shape of a wall with a structure for the purpose.

[0004]

SUMMARY OF THE INVENTION The present invention employs, among the above various seismic design means, a damping structure, and as an arrangement position of the damping structure, the whole structure is a wall-shaped damping structure. As a result, there are various restrictions in terms of architectural planning, and as a result, instead of the conventional technology, it was difficult to secure the wall-shaped structure for mounting the damping device at an appropriate position. By incorporating the damping device into the stairs, it is easy to secure a position where the damping device is to be arranged.

[0005]

One of the concrete means for solving the above-mentioned problem is to control a space between adjacent landings of a stairway having landings formed at both ends and between the landings on the back side thereof. It is a vibration control structure equipped with a vibration device.

[0006] Two of the concrete means for solving the problem are:
A vibration damping structure is provided in which a vibration damping device is disposed at a portion where a landing is formed at both ends of the stairs and the floor of each floor, at a portion where the landing is joined to the floor of each floor.

[0007] The concrete means 3 for solving the problem is as follows.
This is a vibration control structure using an oil damper using a viscoelastic body or the like as a vibration control device.

[0008] Specific means 4 for solving the problem is as follows.
This is a vibration control structure using a honeycomb damper that makes use of the elasto-plasticity of steel as a vibration control device.

[0009] The fifth means for solving the problem is as follows.
This is a seismic control structure in which a slide bearing is arranged between the landing and the receiving beam.

[0010] The concrete means 6 for solving the problem is as follows.
After the stairs having landings formed at both ends manufactured in advance in the stairs room are placed and installed on the beams to receive the stairs, the damping device is straddled across both landings by the mounting bracket provided on the back side of the adjacent landing. This is the attached construction method.

[0011] The concrete means 7 for solving the problem is as follows.
This is a vibration damping construction method in which a mounting bracket is provided on the back side of each adjacent landing, and a vibration damping device using an oil damper using a viscoelastic body or the like is mounted on both landings by using the mounting bracket.

The concrete means 8 for solving the problem is as follows:
This is a vibration damping construction method in which a mounting bracket is provided on the back side of an adjacent landing across the both landings, and a vibration control device using a honeycomb damper utilizing the elasticity and plasticity of steel is mounted between the mounting brackets.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

[0014]

Embodiment 1 FIG. 1 is a perspective view showing a case where the vibration control structure of the present invention is applied to a staircase. The staircase 1 is made in advance in a factory or the like and has a landing 2 on the upper floor and a landing 3 on the lower floor. And a step 4 communicating between the landings 2 and 3, and is installed at a predetermined location in the field. It is usually suspended by a crane or the like and installed sequentially from the lower floor side.

When the stairs 1 are installed, an H connecting the columns 5 in the space of the staircase room between the columns 5 formed in the building.
An end of the landing 2 on the upper floor in the middle of the floor is placed on the upper receiving beam 6 on the flange 7 of the receiving beam 6 such as a shaped steel, and a reinforcing bar for fixing to the floor slab is embedded. Floor landing 3
Of the stairs 1 by placing the end of
Is installed at a predetermined place in the staircase.

The stairs 1a adjacent to the stairs 1 are placed on the flanges 7 of the receiving beams 6 in parallel with the landings 2 on the lower floor, which is located in the middle of the floor, and the landing 2a on the upper floor is ,
The end is placed on the receiving beam 6 on the upper floor side. The landing 3 on the lower floor and the landing 2a on the upper floor are fixedly integrated with the building floor slab. By repeating this, a continuous stair is formed from the lower floor to the upper floor.

In the installation of the stairs 1, the landing 2 on the upper floor and the landing 3a on the lower floor of the stair 1a located above the landing 2 are arranged adjacent to each other as described above. However, a gap W is provided on the side surface, and a vibration damping device 8 is formed below the floor of the landings 2, 2b, 3a, 3c,. In this embodiment, an oil damper using a viscoelastic body or the like is installed as the vibration damping device 8.

FIG. 2 shows landings 2, 2b, 3a, 3c,.
3 is a sectional view taken along a line aa in FIG. 2, and FIG. 4 is a landing section 2, 2b, 3a, 3c.
5 is a cross-sectional view showing the relationship between the receiving beam 6 and the slide bearing 10.

FIGS. 2 to 5 show in detail the arrangement of the vibration damping device 8 installed between the adjacent landings 2, 2b,..., 3a, 3c,. As the above-described vibration damping device, a vibration damping device 8 using an oil damper using a viscoelastic body or the like is provided with a mounting metal 9 provided at each of the landings 2, 2b,..., 3a, 3c,. 3c .. It is fixed to the floor under the straddle.

The landing 2, on the stairs 1, 1a, 1b,
Since a gap W is formed between 2b, 3a, 3c, and so on, when the building shakes due to an earthquake or wind, the gap W and the vibration damping device separate or approach the landings caused by the shaking. It is possible to absorb the displacement that occurs.

The stairs 1 are supported by a flange 7 of a receiving beam 6 for supporting a load in the vertical direction. In a landing portion located in the middle of the floor, the receiving material 1 is placed on the flange 7.
5 is attached and landings 2, 2b,... Are allowed in order to allow horizontal displacement in a direction perpendicular to the ascending and descending direction of the stairs.
A slide bearing 10 is attached to the back side of 3a, 3c,.
Is installed by being fitted to the convex portion provided in. Therefore, the vertical load of the stairs 1 is applied to the receiving beam 6 via the slide bearing 10.
Will be supported.

[0022]

Embodiment 2 FIG. 6 shows another embodiment of the vibration damping device, and FIG. 6 is a front sectional view. As above,
Under the floors of the landings 2, 2b,..., 3a, 3c,. In this embodiment, an elastic-plastic damper is used as the vibration damping device 11. The elasto-plastic damper is formed by arranging circular or polygonal holes horizontally at horizontal intervals in a rectangular parallelepiped mild steel block formed in a fixed size. An elasto-plastic damper in which hexagonal honeycomb-shaped holes are formed is used (hereinafter, referred to as "honeycomb damper").

FIG. 7 is a sectional view taken along the line bb in FIG.
Shows rear views of landings 2, 2b,..., 3a, 3c... H-shaped mounting brackets 13 are mounted facing each other across adjacent landings 2, 3a, and between lower flanges of both mounting brackets 13. Is provided with a honeycomb damper 12.

When the stairs 1 are installed, similarly to the first embodiment, in the space of the staircase room between the columns 5 formed in the building, receiving beams 6 such as H-section steel connecting the columns 5 are provided. The end of the landing 2 on the upper floor, which is located in the middle of the floor, is placed on the upper receiving beam 6 via the slide bearing 10 on the flange 7 of
By mounting the end of the landing 3 on the lower floor on a lower receiving beam (not shown), the stairs 1 are installed at a predetermined place in the staircase (see FIG. 1).

FIG. 9 is a plan view of the building with the stairs installed. The portion surrounded by the dashed line indicates a landing where reinforcing bars are embedded in advance for fixing to each floor slab. is there. Shaking in the X direction of the structure can be dealt with by installing and installing a conventional vibration damping device on the construction surface 14 surrounded by the pillars 5 and the beams 6, and the shaking in the Y direction is provided below the landing floor of the stairs. It became possible to control the vibration with the installed vibration control device.

[0026]

Third Embodiment In the first and second embodiments, the vibration damping devices 8 and 11 are installed under the floors of the adjacent landings 2, 2b,..., 3a, 3c. As an example of the vibration damping device 8 at the connection between the landing and the floor of each floor,
11 can also be installed. At that time, similarly to the first and second embodiments, it is necessary to devise a structure so that the interlayer displacement amount of each floor is concentrated at the place where the vibration damping device is provided.

Next, a method of constructing a vibration control incorporating a vibration control device will be described. In a staircase which is a vertically long space surrounded by columns 5 and beams 6, a staircase 1 having landings 2 and 3 formed at both ends in advance manufactured at a factory or the like is provided with stairs 1 at ends of the landings 2 and 3 by beams 6. (See FIG. 1).

The installation method is as follows. The recess formed in the slide bearing 10 attached to the back side of the landing 2, 3 a is fitted to the projection of the receiving member 15 attached to the upper surface of the flange of the beam 6. 3 a is slidably installed along the upper surface of the beam 6. Next, by attaching the vibration damping device across both landings with the mounting brackets 9 and 13 provided on the back side of the adjacent landing, a vibration damping structure incorporating the vibration damping device is completed (see FIGS. 2 to 8). ).

The case where the vibration damping device 8 using an oil damper using a viscoelastic body or the like is incorporated as the above-described vibration damping device will be described. As shown in FIGS.
Attachment fittings 9 and 9 are provided on the back side of 3a, respectively, and the vibration damping device 8 is attached by using the attachment fittings 9 and 9 so as to be incorporated across both landings.

A description will be given of a case where a vibration damping device 11 using a honeycomb damper utilizing the elasto-plasticity of steel is incorporated as the above-described vibration damping device. As shown in FIGS.
On the back side of the landings 2 and 3a, mounting brackets 13 and 13 having an H-shaped cross section are provided across the landings 2 and 3a.
Attach the damping device 11 between the lower flanges of the 3 and 13.

Although the vibration control device of the present invention has been described above with reference to a precast concrete staircase manufactured in a factory, the present invention can be widely applied to a staircase of an existing building.

[0032]

The vibration damping device and the vibration damping construction method incorporating the vibration damping device according to the present invention are characterized in that the vibration damping devices installed at the landings of the stairs or at the joints between the floors and the landings are capable of moving the stairs up and down. It is possible to realize vibration control for the shaking when the building shakes at right angles. In addition, by installing the vibration control device on the stairs, there is no restriction on the plan of the structure, and the effect of increasing the degree of freedom in design can be expected.

[0033]

[Brief description of the drawings]

FIG. 1 is a perspective view of a step portion showing a state where a vibration control structure of the present invention is installed.

FIG. 2 is a front sectional view of a stair portion showing a state where the vibration control structure of the present invention is installed.

FIG. 3 is a side sectional view of a stair portion showing a state where the vibration control structure of the present invention is installed.

FIG. 4 is a rear view of a stair portion showing a state where the vibration control structure of the present invention is installed.

FIG. 5 is an enlarged sectional view of a landing and a receiving beam on which the vibration control structure of the present invention is installed.

FIG. 6 is a front cross-sectional view of a stair portion showing a state where the vibration control structure of the present invention is installed.

FIG. 7 is an enlarged cross-sectional view of a landing and a receiving beam provided with the vibration control structure of the present invention.

FIG. 8 is a rear view of a stair portion showing a state where the vibration control structure of the present invention is installed.

FIG. 9 is a plan view of a stair portion showing a state where the vibration control structure of the present invention is installed.

[Explanation of symbols]

 1 stairs 1a stairs 1b stairs 2 landings 2a landings 2b landings 3 landings 3a landings 3b landings 4 steps 5 pillars 6 receiving beams 7 flanges 8 damping devices 9 mounting brackets 10 slide bearings 11 damping devices 12 mounting brackets Surface 15 Receiving member

Claims (8)

[Claims] 1. A vibration control structure characterized in that a vibration damping device is provided between landings adjacent to a stairway where a landing is formed and between the landings on the back side thereof. 2. A vibration damping device is provided at a portion of a stairway having landings at both ends where the landing is connected to a floor of each floor, between the landing on the back side and the floor of each floor. Characteristic vibration control device. 3. The vibration damping structure according to claim 1, wherein an oil damper using a viscoelastic body or the like is used as the vibration damping device. 4. The vibration damping device according to claim 1, wherein an elastic-plastic damper utilizing the elasto-plasticity of a steel material is used as the vibration damping device. 5. The vibration damping structure according to claim 1, wherein a slide bearing is provided between the landing and the receiving beam. 6. A staircase having landings formed at both ends in advance in a staircase, which is formed at a factory or the like, is placed on a beam and installed, and is then straddled over both landings by a mounting bracket provided on the back side of the adjacent landing. A method of constructing a vibration damping system incorporating a vibration damping device, wherein the vibration damping device is mounted. 7. A vibration damping device using an oil damper using a viscoelastic body or the like is attached to both landings by attaching a mounting bracket on the back side of each adjacent landing. Item 6. A method of constructing a vibration control incorporating the vibration control device according to Item 6. 8. An H-shaped mounting bracket is provided across the landings on opposite sides of the adjacent landings, and is provided between the lower flanges of both mountings by a honeycomb damper utilizing the elasto-plasticity of steel. A vibration damping construction method incorporating the vibration damping device according to claim 6, wherein a vibration damping device is attached.