JP2936294B2 - Joint structure of movable bearing in communication passage of structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a movable support portion which enables a support portion of a communication passage connecting high places of a structure to be movable.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a movable bearing portion of a communication passage connecting high places of a structure separated by a road or the like has a base end fixed to a steel frame of one structure and the other end is free. The bearing steel 30 at the tip of the horizontal girder is made of tetrafluoroethylene resin (commercially available) on the steel 31 fixed to the other structure with a space between the bearing steel 30 of the horizontal girder and the other structure. The horizontal girder is placed via a thin plate 32 having a small coefficient of friction, such as Teflon, so that even if a slight horizontal force is applied due to an earthquake or the like, the horizontal girder is freely displaced.

[0003]

The movable bearing of the conventional communication passage has a Teflon-like structure between the tip of the horizontal girder of the structure and the steel material on which the horizontal girder of the structure is placed when a horizontal force such as an earthquake is applied. By interposing a thin sheet, the coefficient of friction is reduced as much as possible, and the tip of the horizontal girder of one structure and the steel material of the other structure restrain each other, causing damage such as breakage or deformation. For the purpose of preventing the displacement, the displacement was released by sliding with low friction based on the technical concept of allowing the displacement to be as free as possible.However, since the friction coefficient of Teflon on the bearing surface is extremely small, about 0.01, Even when the acceleration of the horizontal force is extremely small, such as 80 gal or less, the tip of the horizontal girder moves and the support part is displaced, the joint of the communication passage is bent, and the appearance is impaired. It is troublesome that repairs must be performed for every small earthquake or other vibration that often occurs due to the provision of equipment piping such as cables, and walking while passing through the communication passage because the tip of the horizontal girder shakes due to a small earthquake etc. There is a drawback that gives a feeling of instability to the elderly and gives anxiety about the reliability of the structure of the communication passage.

The present invention solves the above-mentioned drawbacks and prevents the tip of the horizontal girder from moving by a horizontal force such as an earthquake that is small enough not to damage the structure, causing a joint to bend or requiring repair work. 80 gal (Seismic intensity 5
The end of the horizontal girder moves in the event of an earthquake or the like above, but the conventional bearings try to minimize the friction as opposed to trying to minimize the friction. It is an object of the present invention to provide a joint structure of a movable bearing that can prevent damage such as breakage or deformation.

[0005]

According to the present invention, an upper steel plate attached to a horizontal girder at the end of a communication passage is directly mounted on a lower steel plate attached to a support beam.
The acceleration of horizontal force such as an earthquake is 80 between the upper steel plate and the lower steel plate.
The upper steel plate with the joint structure and the surface of the movable bearing part in the communication passage of the structure that is tightened with high-strength bolts so that it is displaced when it exceeds about gal, and the surface of the movable bearing is finished by grinding and molybdenum disulfide treatment on it The L-shaped plate is brought into contact with both side edges of the lower steel plate and the upper steel plate, the lower steel plate and
Means are provided for joining the movable bearings in the communication passage of the structure which is fastened with high-strength bolts through the form plate.

[0006]

The operation of the present invention will be described with reference to embodiments.
The conventional friction member using Teflon has a coefficient of friction of about 0.01, so the bearing portion is moved even with a horizontal force such as an extremely small earthquake having an acceleration of 80 gal or less. The upper steel plate and the lower steel plate of the bearing are fastened with high-strength bolts so that when the horizontal force exceeding the acceleration of about 80 gal is applied, both steel plates are displaced. Never move. However, by measuring and adjusting the tightening force of the high-strength bolt with a strain gauge, when an earthquake or the like with a large acceleration of 80 gal or more occurs, the tip of the communication passage may move on the support beam. It is possible to prevent the structure from being damaged or deformed.

[0007]

An embodiment of the present invention will be described with reference to the drawings. In FIG. 4, a communication passage 3 connecting the structures 1 and 2 is provided at a high place between the structure 1 and the structure 2 separated by a road or the like. In FIG. 5, an overhang 4 is provided on the side surface of the structure 1, a base 5 of the communication passage 3 is attached to the overhang 4, and a distal end 6 of the overhang 4 is a bearing made of H-shaped steel or the like attached to the structure 2. Mounted on beams 7.
As shown in FIGS.
The lower steel plate 9 is fixed to the bearing beam 7 reinforced by welding in the length direction thereof by welding or the like. The lower steel plate 9 has an upper surface in the longitudinal direction of which is polished to a similar finish, and if necessary, is treated with manganese phosphate, and then is subjected to a treatment such as application of molybdenum disulfide to have a friction coefficient of about 0.2 to 0.4. A long hole 11 is formed in the friction surface 10, and a high-strength bolt 13 is inserted into the long hole 11 via a washer 12 from below. Below the horizontal girder 14 made of H-section steel or the like at the end 6 of the communication passage 3, the lower surface is a friction surface 1 of the lower steel plate 9.
An upper steel plate 16 having the same size as the lower steel plate 9 having the same friction surface 15 as that of the lower steel plate 9 is attached by the following means.

That is, on the upper steel plate 16, the engaging body 1
7 Mounting body 18 behind and supporting body 19 of mounting body 18
The horizontal girder 14 is fitted between the engaging members 17 of the support member 20 by welding or the like, and the bolt holes provided in the upper steel plate 16 at positions corresponding to the long holes 11 of the lower steel plate 9. 21 is a leg 2 of the high-strength bolt 13.
2, a low friction plate 23 made of tetrafluoroethylene resin (trade name: Teflon) is laid between the upper surface of the upper steel plate 16 and the lower surface of the horizontal girder 14. An intermediate flange 14b is provided at the center of the web 14a of the horizontal girder 14 at the height thereof.
Reinforcing ribs 24 are attached between b and the lower flange 14c.

An L plate having a bolt hole 25 at a position corresponding to the bolt hole 21 of the upper steel plate 16 on the lower surface on both sides of the lower steel plate 9.
The shape plate 26 is abutted, and a side portion of the upper steel plate 16 and a rising portion 27 of the L-shaped plate 26 abutting on the upper plate 16 are fastened with screws 28,
The lower steel plate 9 can slide between the upper steel plate 16 and the L-shaped plate 26 integrally fastened by the high-strength bolts 13.

[0010]

According to the present invention, a seismic intensity of about 8 corresponds to about 5.
With horizontal force such as an earthquake of 0 gal or less, the bearings do not move and the joints do not bend, so there is no need to repair each time even for a small earthquake, etc. 80ga
In the case of a large earthquake exceeding l, the bearing is moved to prevent damage such as breakage or deformation of the communication passage or building, and the upper steel plate and the lower steel plate are directly joined and bolted. Therefore, the structure is simple and it is useful for saving materials and construction costs.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a movable bearing taken along line AA of FIG. 2 showing one embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a front view showing an overview of the communication passage.

FIG. 5 is a schematic plan view of the communication passage.

FIG. 6 is a front view showing a conventional example.

[Explanation of symbols]

 3 Communication passage 6 Tip 7 Bearing beam 9 Lower steel plate 13 High strength bolt 14 Horizontal girder 16 Upper steel plate 26 L-shaped plate

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeo Minewaki 2-5-1-4 Minamisuna, Koto-ku, Tokyo Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Yoshimi Shibasaki 8--21 Ginza, Chuo-ku, Tokyo No. 1 Takenaka Corporation Tokyo Main Store (56) References JP-A 63-99051 (JP, U) JP-A 59-156916 (JP, U) JP-A 62-125116 (JP, U) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) E04H 9/02 E04B 1/36

Claims (3)

(57) [Claims] 1. An upper steel plate (16) attached to a horizontal girder (14) at a tip (6) of a communication passage (3) is directly placed on a lower steel plate (9) attached to a support beam (7). Upper steel plate (1
6) and the lower steel plate (9) are subjected to an acceleration of 80 gal, such as an earthquake.
A joint structure of a movable bearing in a communication passage of a structure which is fastened with a high-strength bolt (13) so as to be displaced when the degree exceeds a certain degree. 2. An L-shaped plate (26) is brought into contact with both edges of the upper steel plate (16) and the lower steel plate (9), and is passed through the upper steel plate, the lower steel plate and the L-shaped plate (26) with a high-strength bolt (13). The joint structure of the movable bearing part in the communication passage of the structure according to claim 1, which is tightened. 3. The structure according to claim 1, wherein the lower surface of the upper steel plate and the upper surface of the lower steel plate are finished by polishing and are subjected to molybdenum disulfide treatment. Connection structure of the movable bearing in the communication passage.