JP4129682B2 - Displacement sensor, damping damper and damping structure - Google Patents

Description

  The present invention relates to a displacement sensor that measures the maximum amount of displacement of a vibration control damper, a vibration control damper that includes the displacement sensor, and a vibration control structure that includes the vibration control damper.

A displacement sensor that measures the displacement of the damping damper installed in the building is useful for maintaining the damping damper and grasping the shaking of the building during an earthquake. Conventionally, a displacement sensor has been provided which measures the maximum displacement amount by connecting a detector to measure the rate of change in electrical resistance due to deformation received by an electrical resistor or carbon fiber bundle (see FIG. For example, see Patent Documents 1 and 2.)
JP 2001-153603 A (page 4-7, FIG. 1) JP 2002-303504 A (page 3-6, FIG. 1)

  However, the above-described conventional displacement sensor has a problem that the deformation of the vibration control brace cannot be grasped by simple visual inspection because the maximum displacement is detected by the detector. Further, the above-described conventional displacement sensors are expensive, have high initial installation costs, and require considerable maintenance costs. Therefore, it is difficult to attach a sufficient number of displacement sensors from the viewpoint of economy. Exists.

  The present invention has been made in consideration of the above-described conventional problems, and it is possible to grasp the deformation of the vibration control brace by simple visual inspection, and to install and maintain the vibration control device at low cost, the vibration control damper, and The purpose is to provide a damping structure.

The invention according to claim 1 is a displacement sensor that measures the displacement of a vibration control damper that includes a cylindrical outer portion and an inner portion that is inserted into the outer portion and absorbs vibration energy, and is formed on the outer portion. a viscoelastic member having a length frame is mounted around the hole, and inside formed viscoelastic body of the frame, and a double-edged blade member penetrating the viscoelastic body is fixed to the inner portion, but The blade of the blade member tears the viscoelastic body with relative displacement between the outer portion and the inner portion when the inner portion absorbs the vibration energy and the inner portion is deformed. It is characterized by a displacement sensor that moves while moving .

The invention according to claim 2 is a vibration damping damper comprising a cylindrical outer portion and an inner portion that is inserted into the outer portion and absorbs vibration energy , and is attached around a slot formed in the outer portion. is the frame, and a viscoelastic member having an inner to form a viscoelastic body of the frame, and a double-edged blade member penetrating the viscoelastic body is fixed to the inner portion, provided with a displacement sensor comprising a When the inner portion is deformed to absorb the vibration energy, the blade of the blade member moves while tearing the viscoelastic body in accordance with the relative displacement between the outer portion and the inner portion .

According to a third aspect of the present invention, there is provided a seismic control structure for controlling and reinforcing a frame composed of adjacent columns and beams that are installed between the columns and are vertically opposed to each other. The damping damper of Claim 2 extended is arrange | positioned , The edge part of the said inner side part of this damping damper is joined to the said frame, It is characterized by the above-mentioned.

  Due to such features, when an interlayer deformation of a building occurs due to an earthquake, etc., and the vibration energy at this time is absorbed by the inner part and the inner part is deformed, the blade member cuts the viscoelastic body member accordingly. The viscoelastic body member moves while forming a cut.

According to the displacement sensor, the damping damper, and the damping structure according to the present invention, the displacement sensor that measures the displacement of the damping damper having a cylindrical outer portion and an inner portion that is inserted into the outer portion and absorbs vibration energy. is a frame mounted about the longitudinal hole formed in the outer portion, and a viscoelastic member having an inner which is formed in the viscoelastic body of the frame, the viscoelastic body is fixed to the inner portion A blade member of a double-edged blade, and the blade of the blade member is viscoelastic when the inner part absorbs vibration energy and the inner part is deformed, and the inner part is deformed relative to the outer part. In order to move while tearing the body, when the inner portion absorbs vibration energy and deforms, the blade member moves while tearing the viscoelastic body member, and a cut is formed in the viscoelastic body member. Check the length of the cut visually. By, it is possible to measure the maximum displacement of the seismic control dampers. In addition, since this displacement sensor has a simple configuration, it can be installed at a low cost, and when the cut is formed in the viscoelastic body member due to an earthquake or the like, only the viscoelastic body member has to be replaced, so that it is inexpensive. Maintenance can be performed at maintenance costs.

  Hereinafter, first and second embodiments of a displacement sensor, a damping damper and a damping structure according to the present invention will be described with reference to the drawings.

[First Embodiment]
First, the first embodiment will be described.

  As shown in FIG. 1, a frame 3 is formed in the structure. The frame 3 is composed of adjacent columns 1 and beams 2 that are installed between the columns 1 and face each other up and down. Inside the frame 3, two seismic dampers 4 extending diagonally are arranged in a C shape. A first gusset plate 5 is suspended from the center of the beam 2 forming the upper frame of the frame 3, so that both ends of the beam 2 forming the lower frame of the frame 3 and the columns 1 are inserted. A second gusset plate 6 is provided at the corner. A viscoelastic damping damper 4 is interposed between the first gusset plate 5 and the second gusset plate 6.

  FIG. 2 is a cross-sectional view of the vibration damper 4. As shown in FIGS. 1 and 2, the damping damper 4 includes a cylindrical outer portion 7, an inner portion 8 inserted into the outer portion 7, and a displacement sensor 9 that measures the displacement of the inner portion 8. It is configured. In the outer portion 7, the flanges 10 a of the two channel steels 10 facing each other are joined to each other by a fastening bolt 12 via a cover plate (steel plate) 11, and a closed space 13 having a rectangular shape in cross section is formed inside. Is.

  The inner portion 8 is spaced from the lower end of the outer portion 7 by a plurality of plate-like (three in the figure) first core members 14 inserted into the outer portion 7 with a gap from the upper end of the outer portion 7. A plurality of (two in the figure) plate-like second core members 15 opened in the outer portion 7 and a damper viscoelastic body 16 filled in the outer portion 7 (closed space 13). Has been.

  The first core member 14 and the second core member 15 are alternately inserted into the closed space 13 from the upper and lower ends of the outer portion 7, and the gap between the first core member 14 and the second core member 15. In addition, a damper viscoelastic body 16 is filled in the gap between the channel steel 10 and the first core member 14. The upper end of the first core member 14 that protrudes from the upper end of the outer portion 7 is frictionally joined to the first gusset plate 5 by a high-strength bolt, and the second core member 15 that protrudes from the lower end of the outer portion 7. The lower end of is friction bonded to the second gusset plate 6 by a high-strength bolt.

  In addition, a long hole 17 extending in the axial direction of the vibration damper 4 is formed in one cover plate 11 forming the outer portion 7, and the long hole 17 faces the side surface of the second core member 15. It is formed in the position to do.

  FIG. 3 is a sectional view of the displacement sensor 9, and FIG. 4 is a top view of the displacement sensor 9. As shown in FIGS. 2, 3, and 4, the displacement sensor 9 includes a plate-like viscoelastic body member 18 attached to the outer side portion 7 and a blade member 19 fixed to the inner side portion 8. Yes.

  The viscoelastic body member 18 is disposed outside the long hole 17 of the cover plate 11, and the long hole 17 is closed with the viscoelastic body member 18. The viscoelastic body member 18 includes a frame 21 attached to the cover plate 11 around the long hole 17 and a sensor viscoelastic body 22 formed inside the frame 21. The frame 21 has four corners fixed by screws 20, and an inner frame that faces the long hole 17 of the cover plate 11 is formed. The sensor viscoelastic body 22 facing the long hole 17 is formed of a viscoelastic body made of the same material as the damper viscoelastic body 16, and is a sheet having a length of 150 mm to 200 mm, a width of 30 mm to 40 mm, and a thickness of about 5 mm to 10 mm. It consists of small pieces.

  The blade member 19 is formed in a double-edged shape having a rhombus shape, and both blades 19 a of the blade member 19 are directed in the axial direction of the vibration damping damper 4. The blade member 19 is erected on the side surface of the second core member 15, the middle portion of the blade member 19 penetrates the center portion of the sensor viscoelastic body 22, and the upper end portion of the blade member 19 is the sensor viscoelastic body 22. Protruding from.

  Next, the construction method of the displacement sensor 9, the damping damper 4 and the damping structure having the above-described configuration will be described.

  First, as shown in FIGS. 2, 3, and 4, a process of attaching the displacement sensor 9 to the vibration control damper 4 in advance is performed. A long hole 17 extending in the axial direction of the damping damper 4 is formed in the cover plate 11 in the middle of the damping damper 4 to expose the side surface of the second core member 15. A double-edged blade member 19 is joined and erected at the center of the side surface of the second core member 15 exposed to face the long hole 17. The blade member 19 has both blades 19a arranged in the axial direction of the damping damper 4 and the upper end of the blade member 19 protrudes outward from the long hole 17. Next, the viscoelastic body member 18 is covered with the elongated hole 17, the blade member 19 is passed through the sensor viscoelastic body 22 formed inside the frame 21, and the four corners of the frame 21 are fixed to the cover plate 11 with screws 20. To do. At this time, a hole or a cut for penetrating the blade member 19 is formed in the center of the sensor viscoelastic body 22 in advance, and the blade member 19 is inserted into the cut.

  Next, as shown in FIG. 1, a step of installing the damping damper 4 in the frame 3 is performed. At this time, the first gusset plate 5 is suspended from the central portion of the beam 2 that forms the upper frame of the frame 3 in advance, and both ends of the beam 2 and the columns 1 that form the lower frame of the frame 3 A second gusset plate 6 is provided in the corner of the. And the damping damper 4 is each arrange | positioned between the 1st gusset plate 5 of an upper center, and the 2nd gusset plate 6 of the downward both sides. The upper end of the first core member 14 that is the upper end of the vibration damper 4 is frictionally joined to the first gusset plate 5 with a high-strength bolt, and the second core member 15 that is the lower end of the vibration damper 4 is The lower end is frictionally joined to the second gusset plate 6 with a high-strength bolt.

  According to the displacement sensor 9, the damping damper 4 and the damping structure having the above-described configuration, the displacement sensor 9 has a viscoelastic body member 18 attached to the outer portion 7 and the axial direction of the damping damper 4. And a double-edged blade member 19 that passes through the sensor viscoelastic body 22 of the viscoelastic body member 18 and is fixed to the inner portion 8, so that when the inner portion 8 is deformed, the first core member 14 and the first core member 14 The damper viscoelastic body 16 interposed between the two core members 15 absorbs vibration energy by viscous resistance, the blade member 19 moves while tearing the sensor viscoelastic body 22, and the sensor viscoelastic body 22 has a break. Is formed. The maximum amount of displacement of the damping damper 4 can be measured by visually confirming the length of the cut.

  Further, since the displacement sensor 9 has a simple configuration, it can be installed at a low cost and only the viscoelastic member 18 needs to be replaced when a break is formed in the sensor viscoelastic body 22 due to an earthquake or the like. It can be maintained at low maintenance costs.

  Further, since the sensor viscoelastic body 22 is formed of a viscoelastic body made of the same material as the damper viscoelastic body 16, when the vibration damper 4 is exposed to a high temperature state due to a fire or the like, the damper viscoelastic body 16 is When damage such as melting or physical property change occurs, the sensor viscoelastic body 22 is similarly damaged. Accordingly, the damage state of the damper viscoelastic body 16 that is surrounded by the outer portion 7 and cannot be confirmed from the outside is visually checked by confirming the damage state such as the melting of the sensor viscoelastic body 22 due to heat and the change in physical properties. Thus, it is possible to provide a displacement sensor 9 having both functions of a thermal sensor.

[Second Embodiment]
Next, a second embodiment will be described.

  As shown in FIGS. 5 and 6, a steel-based seismic damper 100 is installed on a frame frame (not shown) having the same configuration as that of the first embodiment. The damping damper 100 includes a cylindrical outer portion 101 and a plate-shaped inner portion 102 inserted into the outer portion 101. The inner part 102 is made of a low yield point steel, and the yield stress is less than that of a normal steel material. The inner portion 102 has a shape in which the central portion 102a is narrower than the both end portions 102b, and the rib plates 103 extending in the axial direction are welded at right angles to the both end portions 102b of the inner portion 102, respectively. Has been.

  In the outer portion 101, two channel steels 104 are arranged at intervals so that the outer web surfaces are opposed to each other, and the flanges 104 a of the two channel steels 104 facing each other are disposed via a cover plate (steel plate) 105. They are joined by fastening bolts 115 respectively. A closed space 106 having a rectangular shape in section is formed between the two channel steels 104. The channel steel 104 and the fastening bolt 115 are formed of a steel material having a higher yield stress level than the inner portion 102. A plurality of rib plates 107 extending in a direction orthogonal to the axial direction are welded at intervals to the middle portion of the two channel steels 104, and a plurality of rib plates 107 arranged at intervals are provided. The rib plates 108 extending in the axial direction are welded to each other.

  Further, a displacement sensor 109 that measures the displacement of the inner portion 102 is attached to the web 104 b of one channel steel 104. The displacement sensor 109 is composed of a plate-like viscoelastic body member 110 attached to the outer side portion 101 and a double-edged blade member 111 standing on the inner side portion 102. The viscoelastic body member 110 is disposed outside a long hole 112 formed in the web 104 b of one channel steel 104, and the long hole 112 is closed by the viscoelastic body member 110. The viscoelastic body member 110 includes a frame 113 that is screwed to the cover plate 105 and a sensor viscoelastic body 114 that is formed inside the frame 113. The blade member 111 passes through the center portion of the sensor viscoelastic body 114, and the upper end portion of the blade member 111 protrudes from the sensor viscoelastic body 114.

  According to the displacement sensor 109, the damping damper 100, and the damping structure having the above-described configuration, when the inner portion 102 of the low yield point steel is deformed, the vibration energy is absorbed, and accordingly, the blade member 111 is moved to the sensor viscosity. The elastic body 114 moves while being cut, and a cut is formed in the sensor viscoelastic body 114. The maximum amount of displacement of the vibration damper 100 can be measured by visually checking the length of the cut.

  The first and second embodiments of the displacement sensors 9 and 109, the damping dampers 4 and 100, and the damping structure according to the present invention have been described above. However, the present invention includes the first and second embodiments described above. It is not limited to the form, and can be appropriately changed without departing from the gist thereof. For example, in the first embodiment described above, the displacement sensor 9 is provided on the cover plate 11 and the blade member 19 is fixed to the side surface of the second core member 15. May be fixed to the side surface of the first core member 14, and even in the case of the viscoelastic damping damper 4, the displacement sensor 9 is provided on the web of the grooved steel 10 as in the second embodiment. Then, the blade member 19 may be fixed to the surface of the grooved steel 10 facing the web, and even in the case of the steel-based damping damper 100, the displacement sensor 9 is attached to the cover plate as in the first embodiment. 11 may be provided.

  In the first embodiment described above, the sensor viscoelastic body 22 is formed of a viscoelastic body made of the same material as that of the damper viscoelastic body 16, but in the present invention, the sensor viscoelastic body 22 is made of the damper viscoelastic body. You may form from the viscoelastic body of the property damaged at the temperature below the temperature which the body 16 damages. As a result, the temperature can be detected before the damper viscoelastic body 16 is damaged, and adverse effects on the damping damper 4 can be suppressed. In the first and second embodiments described above, the sensor viscoelastic bodies 22 and 114 are formed from one type of viscoelastic body, but are formed by combining a plurality of types of viscoelastic bodies having different temperature characteristics. May be. Thereby, the temperature around the vibration dampers 4 and 100 can be grasped step by step.

  In the first and second embodiments described above, the frames 21 and 113 are fixed with screws. However, the present invention may be fixed by welding or may be bonded with an adhesive. In addition, it may be attached in a fitting type. In the first embodiment described above, the sensor viscoelastic body 22 is formed to have a length of 150 mm to 200 mm, a width of 30 mm to 40 mm, and a thickness of about 5 mm to 10 mm. The length of the sensor viscoelastic body 22 may be changed as appropriate according to the amount of displacement, and the deviation or blade of the break damping damper 4 in the axial direction formed in the sensor viscoelastic body 22 when the inner part is deformed or the blade. The width of the sensor viscoelastic body 22 may be changed in consideration of the thickness of the member 19, and the thickness of the sensor viscoelastic body 22 may be changed in consideration of durability.

It is a side view of the damping structure for demonstrating the 1st Embodiment of this invention. It is sectional drawing of the damping damper for demonstrating the 1st Embodiment of this invention. It is sectional drawing of the displacement sensor for demonstrating the 1st Embodiment of this invention. It is a top view of the displacement sensor for demonstrating the 1st Embodiment of this invention. It is sectional drawing for demonstrating the 2nd Embodiment of this invention. It is a top view for demonstrating the 2nd Embodiment of this invention.

Explanation of symbols

1 Pillar 2 Beam 3 Frame 4, 100 Damping damper 7, 101 Outer part 8, 102 Inner part 9, 109 Displacement sensor 18, 110 Viscoelastic body member 19, 111 Blade member

Claims (3)

In a displacement sensor that measures the displacement of a damping damper comprising a cylindrical outer portion and an inner portion that is inserted into the outer portion and absorbs vibration energy,
A viscoelastic body member having a frame attached around a long hole formed in the outer portion, and a viscoelastic body formed inside the frame ;
A double-edged blade member fixed to the inner part and penetrating the viscoelastic body ,
The blade of the blade member moves while tearing the viscoelastic body with relative displacement between the outer portion and the inner portion when the inner portion absorbs the vibration energy and the inner portion is deformed. Displacement sensor characterized by that. In Seismic dampers comprising a cylindrical outer portion, and an inner portion that absorbs inserted through vibration energy into the outer side, and
A viscoelastic body member having a frame attached around a long hole formed in the outer portion, a viscoelastic body formed inside the frame, and fixed to the inner portion and penetrating the viscoelastic body . A displacement sensor comprising a double-edged blade member ,
When the inner portion is deformed to absorb the vibration energy, the blade of the blade member moves while tearing the viscoelastic body with relative displacement between the outer portion and the inner portion. Damper. In the seismic control structure that dampens and strengthens a frame consisting of adjacent columns and beams that are installed between the columns and face each other up and down,
The seismic damper according to claim 2, wherein the seismic damper extends obliquely in the frame, and an end of the inner portion of the seismic damper is joined to the frame. Damping structure.

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