JPH0674610B2 - Variable stiffness device unit for vibration control structures - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a variable stiffness device unit used in a seismic control structure, which connects structural elements such as columns, beams, seismic walls, and braces to each other. By changing the rigidity of the structure, the rigidity of the structure can be changed.

[Conventional technology]

2. Description of the Related Art Conventionally, in seismic design of high-rise buildings and important structures, dynamic design has been performed to calculate safety by calculating ground movement and building response during an earthquake.

Seismic resistant methods include seismic isolation or damping methods in which laminated rubber bearings and dampers are interposed between the building and foundation, methods of consuming seismic energy by destroying non-major components of building components, walls or columns. Slits etc. are provided,
There is a method to adjust the building to the optimum rigidity.

By the way, the confirmation of the safety of a building designed by the current seismic design method during an earthquake is based on the basic idea that the absorbed energy due to the hysteresis characteristic accompanied by plasticization of the structure exceeds the earthquake energy acting on the structure. However, this has a reliability problem with respect to the history loop characteristic.

In addition, all of the conventional methods provide a passive seismic resistant structure against natural external forces such as earthquakes and winds, and because the building has a specific natural frequency, resonance phenomena can occur in response to uncertain inputs such as earthquakes. You can't avoid it.

On the other hand, the applicant, in JP-A-62-268479, actively changes the rigidity of the building itself based on the judgment of the response prediction system based on the detected seismic motion instead of the passive seismic resistance method as described above. Therefore, a vibration control method is proposed in which the building is placed outside the resonance region or in a state where the resonance is small, and the safety of the building, the equipment inside the building, and the occupants is improved.

In the above seismic control method, a control device whose connection state is changed by a computer command is installed between all or part of columns, beams, braces, walls and their joints, or between the building and the foundation or an adjacent building. , Damping the building is done as follows.

An earthquake detector is used to detect the occurrence of an earthquake in a narrow area and a wide area around the building, and the observation data is transmitted to a computer via a wired or wireless communication network. The wide area seismic detector is connected to the seismograph at the existing seismic observation point or a specially installed seismometer by a micro line or a telephone line. The narrow-area seismic sensing device is composed of a seismograph installed around the building or in the surrounding ground, and a vibration sensor installed in the building base or inside the building. The influence of wind force is detected by the vibration sensor inside the building.

Regarding the detected earthquake, the computer determines the scale of the earthquake, analyzes the frequency characteristics, predicts the response amount, etc., bypasses the resonance regarding whether or not to control the building vibration, and the control amount when it should be controlled, It is judged that it gives the optimum stiffness (natural frequency) with a small amount of seismic response.

The computer command is transmitted to the control device of each part of the building, and the control device is operated so that the rigidity of the building becomes the optimum rigidity based on the prediction of the computer. For adjusting the connected state, the fixed state and the released state are adjusted by turning on and off with a hydraulic mechanism, electromagnet, etc., and the hydraulic mechanism is used for the outside of the fixed state, the released state, the introduction of tension force and the fixing at any position. Alternatively, a special alloy or the like may be used for adjustment.

Further, the vibration sensor arranged in the building can detect the response amount in each part of the building and the actual vibration when the control is performed, and by feeding back this, the control amount can be corrected.

In addition, conventional variable-rigidity buildings include, for example, expanding or contracting a brace in a structure surrounded by columns and beams, varying the rigidity of the brace itself, or connecting the columns or beams to the brace. Control is performed by changing the rigidity of the frame by switching between on and off (Japanese Patent Laid-Open No. Sho.
63-70734, Japanese Patent Application No. 61-258794, Japanese Patent Application No. 62-285
069, Japanese Patent Application No. 62-285070, Japanese Patent Application No. 62-289780, etc.).

[Problems to be Solved by the Invention]

In conventional variable-rigidity buildings, various variable-rigidity mechanisms have been considered for each structural component, but since the mechanisms are different, it is necessary to control according to the control method and the function of each device. The overall control may be complicated.

The present invention is intended to solve the above problems, and provides a device having versatility by uniting a variable rigidity mechanism.

[Means for Solving the Problems]

Hereinafter, the outline of the present invention will be described using the reference numerals of the drawings corresponding to the embodiments.

The variable-rigidity device unit for seismic control structure of the present invention is a unit arranged between structural components such as columns, beams, seismic walls or braces of a structure, and a male type 2 having a variable connection state. It consists of female mold 3.

The male die 2 and the female die 3 are respectively fixed to one of the facing surfaces of the structural component elements, and the stress transmission state between the structural component elements is made variable by changing the connection state of each unit.

As the compression type unit 1, a guide hole 5 for guiding the rod-shaped fitting portion 4 of the male mold 2 is provided in the female mold 3, and a stopper 6 that operates according to a command from the control mechanism is provided in the guide hole 5. The stopper 6 moves within the guide hole 5 between an entry blocking position (see FIG. 1) that blocks entry of the fitting portion 4 of the male die 2 and an entry allowing position (see FIG. 2) retracted from the guide path. It is possible to transmit the compression force between the male die 2 and the female die 3 by blocking the entry of the male die 2 into the insertion portion 4 or retract the stopper 6 to insert the male die 2 Part 4
By allowing the entry of the above, it is possible to make the state in which the compression force is not transmitted.

Further, as the pull-type unit 11, the rod-shaped fitting portion 14 of the male type 12 is used.
The enlarged head 17 is provided at the tip of the female mold 13, and the enlarged head 17 is locked by the stopper 16 provided in the guide hole 15 of the female die 13 similar to the case of the compression type unit 1, The pulling force can be transmitted between the male mold 12 and the female mold 13 by preventing the male mold 12 and the female mold 13 from being pulled out, or the pulling force is transmitted by retracting the stopper 16 and allowing the fitting portion 14 of the male mold 12 to slip out. It can be in a state not to be performed.

It should be noted that stoppers are provided at two positions in the depth direction within the female guide hole so that one (back side) can prevent the male fitting portion from entering, and the other (front side) is provided in the male fitting portion. By making the enlarged head lockable, it is possible to provide a variable rigidity device unit that can be controlled in both compression and tension directions.

Such variable-rigidity device units are distributed and arranged at necessary locations in the structure, and in the same manner as in the case of the variable-rigidity building described in the section of the prior art, depending on the detected input earthquake motion or the response of the structure, etc. By controlling the connection state of the individual variable rigidity device units, the rigidity of the column beam structure or the entire structure can be changed and the response of the structure can be suppressed.

〔Example〕

 Next, the illustrated embodiment will be described.

1 to 3 show an embodiment of a compression type unit according to the present invention, and a fixing plate 9 provided with a male mold 2 and a female mold 3 on opposing structural components 20 is provided. It is fixed with bolts, etc.

As shown in the figure, the operation of the stopper 6 can prevent the rod-shaped fitting portion 4 of the male die 2 from entering or allow the fitting portion 4 to enter. The stopper 6 is attached by the spring 7 to the fitting portion 4
Is urged toward the guideway side of the
By turning it off, it is possible to take in and out between the position protruding to the guideway side and the position retracted.

FIG. 1 shows a state in which the compression force is transmitted. When the electromagnetic force 8 is turned off, the stopper 6 is projected to the guide path side, and the stopper 6 and the tip of the fitting portion 4 of the male die 2 are brought into contact with each other, the compression force is Transmitted.

In FIG. 2, the electromagnet 8 is turned on and the stopper 6 is retracted to allow the fitting portion 4 of the male die 2 to enter. Even if a force in the compression direction acts, the compression force is not transmitted.
This state is called a relaxation state-1.

Fig. 3 shows a state in which a tensile force is applied.
In this state, no force is transmitted regardless of the position of the stopper 6. This state is called a relaxed state-2.

FIG. 4 shows an embodiment of the tension type unit according to the present invention, in which bolts or the like are used through a fixing plate 19 in which a male mold 12 and a female mold 13 are respectively provided on opposing structural component elements 20. It is fixed.

In the tension type unit 11, an enlarged head is attached to the tip of the male 12 insertion part.
14 'is provided, and the enlarged head 14' can be locked by the stopper 16. The pulling force is transmitted by turning off the electromagnetic force 18 to cause the stopper 16 to protrude to the guide path side, and by locking the enlarged head 14 'of the fitting portion 14 of the male die 12 with the stopper 16. When the electromagnetic force 18 is turned on and the stopper 16 is retracted, the fitting portion 14 of the male die 12 moves freely and the stress is not transmitted.

5 to 7 show an example of the operating state of the apparatus when the compression type unit 1 is installed between the column 21 and the wall 23 of the beam-column structure.

FIG. 5 shows a state in which the compression type unit 1 is in a compressive force transmitting state and the column-beam frame and the wall 23 are connected, and the wall 23 is the column 21 and the beam.
Since it works in cooperation with 22, it has high building rigidity.

In FIG. 6, the compression type unit 1 is in the above-mentioned relaxed state-1, the column beam frame and the wall 23 are not connected, and the wall 23 does not work as a vibration control element. That is, the rigidity of the building is low.

FIG. 7 is similar to FIG. 6, but the compression unit 1 is in the relaxed state-2 described above.

8 to 10 show various uses of the variable rigidity device unit of the present invention.

FIG. 8 shows a column-beam frame and a wall 23 by a plurality of compression type units 1.
The compression type units 1 are arranged symmetrically so that the vibration of the building can be controlled. The control of the compression type unit 1 controls ON / OFF of the electromagnet so as to realize an appropriate building cycle in relation to the predominant cycle of earthquake motion.

In the embodiment of FIG. 9, the brace 24 is made by interposing the tension unit 11 in the center of the brace 24 made of steel or the like.
The rigidity of the building is controlled by making the brace 24 effective or ineffective against the tensile force acting on.

In the embodiment shown in FIG. 10, the compression type unit 1 is interposed in the center of a brace 25 composed of a pair of wires so as to be sandwiched between the wires. When a force in the pulling direction is applied to the wire, the wire brace 25 bears the pulling force by setting the compression unit 1 in the compression force transmitting state, and the wire brace 25 is set in the relaxing state -1 by the compression type unit 1. It will not bear the tensile force.

〔The invention's effect〕

In the conventional variable-rigidity building, the variable-rigidity device unit for seismic control structure of the present invention is designed such that the variable-rigidity mechanism is designed for each structural component and control is performed for each variable-rigidity mechanism. The mechanism is unitized as a device and has versatility, and maintenance and replacement are easy. Further, mass production as a device unit is possible.

The variable rigidity device unit has a simple structure in which the connection state can be changed by controlling the stopper that prevents the male fitting part from entering or exiting in the combination of the male type and the female type. It's easy.

Furthermore, since the control mechanism is unified as a unit, compared to the case where a variable rigidity mechanism is designed for each structural component,
Design of seismic control structure becomes easy.

[Brief description of drawings]

1 to 3 are sectional views showing the structure and function of a variable rigidity device in one embodiment of the present invention, FIG. 4 is a sectional view showing another embodiment, and FIGS. 5 to 7 are damping walls. FIG. 8 is an explanatory view showing the operating state of the device when combined with FIG. 8, and FIGS. 8 to 10 are explanatory views showing various usage examples. 1 ... compression type unit, 2 ... male type, 3 ... female type, 4 ...
... Fitting part, 5 ... Guide hole, 6 ... Stopper, 7 ... Spring, 8 ... Electromagnet, 9 ... Fixing plate, 11 ... Tension type unit, 12 ... Male type, 13 ... Female type, 14…
… Insertion part, 14 ′ …… Enlarged head, 15 …… Guide hole, 16 …… Stopper, 17 …… Spring, 18 …… Electromagnet, 19 …… Fixing plate, 20 …… Structural component, 21 …… Pillars, 22 …… beams, 23 ……
Wall, 24 ... Brace, 25 ... Brace

Front page continued (72) Inventor Tadashi Nasu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Kurata Adult 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Ken Kashima Inside the corporation

Claims (2)

[Claims] 1. A unit arranged between structural components in a structure, having a male mold having a rod-shaped fitting portion fixed to one of the facing surfaces of the structural component, and the male fixed to the other. A guide having a guide hole for guiding the fitting portion of the mold, and the guide hole and the guide hole which prevent the fitting portion from entering a guide path in the guide hole according to a command from a control mechanism. A variable-rigidity device unit for seismic control structure, which is provided with a stopper that can move between an admissible position retracted from a road. 2. A male unit having a rod-shaped fitting portion fixed to one of facing surfaces of the component and having an enlarged head at the tip, which is a unit arranged between the structural components in the structure. The female die is fixed to the other side and has a guide hole for guiding the male fitting portion. The enlarged head portion of the fitting portion is locked in the guiding hole by a command from a control mechanism, A seismic control structure provided with a stopper movable between a slip-out prevention position for preventing movement in the guide hole in a slip-out direction from the guide path and a slip-out allowance position retracted from the guide path. Variable stiffness device unit for.