KR20140146815A - Earthquake isolation device having anti-bridge and tensile reinforcing - Google Patents

Abstract

The present invention relates to a seismic isolation device having anti-bridge and tensile reinforcing performance, wherein omnidirectional horizontal displacement is absorbed to secure the stability of a bridge, an upper structure can be stably supported so as to minimize the unseating failure due to overturning, and simplify the manufacturing due to the very simple structure. A seismic isolation device having anti-bridge and tensile reinforcing performance, according to the present invention, comprises: a lower plate (10) having guide rails (12) provided in parallel to each other at a space from each other and provided to the top surface of the lower structure of the bridge; bidirectional blocks (20) having first and second guide grooves (21, 22) perpendicular to each other and slidingly coupled to the guide rails (12) through the first guide grooves (21); an upper plate (30) having guide rails (32) slidingly provided to the second guide grooves (22) of the bidirectional blocks (20) and provided to the bottom surface of the upper structure of the bridge; and an energy dissipation member (40) arranged between the lower plate (10) and the upper plate (30) and allowing the horizontal displacement while supporting the weight of the upper structure in the gravity direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an earthquake isolation device having anti-

The present invention relates to an isolation device having anti-fall prevention and tensile resistance performance capable of absorbing a horizontal displacement in all directions to ensure stability of a bridge, and stably supporting an upper bridge structure to minimize the risk of fall-

In general, important facilities such as distribution facilities and gas tanks, bridges, and major buildings are installed on the lower structure to ensure vibration damping and stability against earthquakes.

In this type of seismic isolation device, a coil spring is mainly used to perform a seismic isolation function. However, due to the characteristic of the coil spring, the shock absorbing performance is excellent, but the damping ability is small. .

Such an isolation device using coil springs is not suitable for use in lightweight distribution facilities such as railroad bridges and lightweight structures such as gas tanks, as compared with weight structures such as railway bridges.

In addition, there is an isolator equipped with a hydraulic damper at the center of the polyurethane disc receiver, but this is a fundamental problem that it is difficult to make and maintain and manage because of using a viscous body.

As a seismic isolation device in which such a conventional problem is solved, Patent Registration No. 10-1162687 is disclosed in a patent publication.

Since the seismic isolation device is developed for supporting a lightweight superstructure such as a distribution facility or a gas tank, the use of the seismic isolation device is inadequate for supporting a heavy structure such as a bridge or a building. There is a risk of overturning of the upper structure that is seamed easily due to the easy lifting phenomenon. Furthermore, since the number of the component parts is relatively large, it was difficult to manufacture the product and the manufacturing cost was increased. And there was a fundamental problem that management was difficult.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a bridge structure capable of absorbing a horizontal displacement in all directions to secure stability of a bridge and to stably support a bridge overhead structure, The object of the present invention is to provide a seismic isolation device having a structure that is very simple and easy to manufacture and has anti-fall prevention and tensile resistance.

According to an aspect of the present invention,

A lower plate provided on the upper surface of the lower structure of the bridge, the lower plate being provided with guide rails spaced apart from each other and installed side by side;

A bi-directional block having first and second guide grooves orthogonal to each other and slidably coupled to the guide rail via a first guide groove;

An upper plate having a guide rail slidably installed in a second guide groove of the bidirectional block, the upper plate being installed on the lower surface of the upper structure of the bridge;

And an energy dissipating mechanism disposed between the bottom plate and the top plate for supporting the weight of the upper structure in a gravitational direction while allowing a displacement in a horizontal direction.

In the present invention, a stopper for restricting lateral movement of the bidirectional block is further provided at the distal end of the guide rail.

Further, in the present invention, the guide rails inserted into the first and second guide grooves of the bidirectional block are formed to be relatively smaller than the first and second guide grooves.

According to the present invention, since the guide rail of the lower plate and the upper plate are slidably connected to each other through the bidirectional block, the guide rail can be horizontally moved in one direction (in the direction of the throttle axis or perpendicular to the throttle) It is possible to allow an excessive displacement to stabilize the upper structure.

Further, since the guide rails of the lower plate and the upper plate are fitted in the first guide grooves and the second guide grooves of the bidirectional blocks, respectively, so that they can only move in the horizontal direction and can not be released in the vertical direction, Even if the upper structure is transmitted to the upper structure and the upper structure receives tensile force, the problem that the upper structure is overturned due to the coupling structure can be minimized.

In addition, when an excessive displacement due to a horizontal load or an impact load such as an earthquake occurs, the bidirectional block moving along the guide rail is impulsive to the stopper, thereby limiting the movement and absorbing the shock. Therefore, an excessive horizontal load or impact load It is possible to minimize the problem of damaging and damaging the bridge structure, and also to solve the problem that the bridge overhead structure is dropped due to the movement restriction.

Further, since a separate stopper is integrally formed on the guide rail without having to be installed in the upper structure and the lower structure, the installation space can be reduced, a work space can be secured during maintenance, and a problem It is possible to expect an additional effect that can be solved.

Further, since the present invention has a very simple structure and is very easy to manufacture, there is an advantage that the manufacturing cost and manufacturing time can be shortened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a seismic isolation device having fall protection and tensile resistance capabilities according to the present invention; FIG.
FIG. 2 is an exploded perspective view of a seismic isolation device having fall prevention and tensile resistance performance according to the present invention. FIG.
3 and 4 are a cross-sectional view taken along the line A-A 'and a cross-sectional view taken along the line B-B' in FIG.
5 is a perspective view for explaining an operation relationship between a guide rail and a bidirectional block in a seismic isolation device having anti-fall prevention and tensile resistance performance according to the present invention.
6 is a plan view of a seismic isolation device having fall protection and tensile resistance performance according to the present invention.
7 and 8 are views for explaining the behavior of a seismic isolation device having anti-falling and tensile resistance properties according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a seismic isolation device having anti-fall prevention and tensile resistance performance according to the present invention, FIG. 2 is an exploded perspective view of a seismic isolation device having anti- 1 is a cross-sectional view taken along line A-A 'and B-B' of FIG. 1, and FIG. 5 is a perspective view for explaining an operation relationship between a guide rail and a bidirectional block in a seismic isolation device having anti- 6 is a plan view of a seismic isolation device having anti-falling and tensile resistance capabilities according to the present invention.

1 and 2, a seismic isolation apparatus according to an embodiment of the present invention includes a lower plate 10, a bidirectional block 20, an upper plate 30, and an energy dissipating mechanism 40.

The bottom plate 10 and the top plate 30 are formed of plate-shaped bases 11 and 31 and a pair of guide rails 12 and 32 and are arranged orthogonally to each other via the bidirectional block 20 And the energy dissipating mechanism 40 is installed between the bottom plate 10 and the top plate 30. The energy dissipating mechanism 40 is installed between the bottom plate 10 and the top plate 30,

Referring to FIG. 2, the bi-directional block 20 includes first and second guide grooves 21 and 22 which are orthogonal to a lower surface and an upper surface.

The guide rails 12 and 32 of the lower plate 10 and the upper plate 30 are slidably engaged with the first guide groove 21 and the second guide groove 22, The lower plate 10 and the upper plate 30 are inserted into the first guide groove 21 and the second guide groove 22 respectively (see FIGS. 3 and 4) .

For example, the first guide groove 21 and the second guide groove 22 are T-shaped, and the guide rails 12 and 32 are correspondingly coupled to each other. When the guide rails 12 and 32 are coupled to each other, So that it is impossible to deviate in the vertical direction.

The above-described structure is merely an example, and any known structure can be applied as long as it has the same function as described above.

The guide rails 12 and 32 of the lower plate 10 and the upper plate 30 are slidably connected to each other in an orthogonal state through the bidirectional block 20 so that the guide rails 12 and 32 can be slid in one direction The vertical movement in the direction perpendicular to the throttling axis) and the horizontal movement in the forward direction allow the displacement of the upper structure to be more stabilized.

Even if an earthquake load and an excessive wind load are exerted on the upper structure to generate a tensile force on the upper structure, the guide rails 12 and 32 of the lower plate 10 and the upper plate 30 are engaged with the first guide grooves 21 And the second guide groove 22 so that they can only move in the horizontal direction and can not be separated in the vertical direction. Therefore, the problem of overturning the upper structure can be minimized.

The energy dissipating mechanism 40 is a well known seismic mechanism such as Lead Rubber Bearing (LBS), Friction Pendulum System (FPS), High Damping Rubber Bearing (HDRB) In the present embodiment, is disposed between the bottom plate 10 and the top plate 30, and functions to allow horizontal displacement of the upper structure of the bridge while supporting the weight in the gravity direction.

As a preferred example, a high-damping rubber bearing is used in the case of the present embodiment, and a highly damped rubber bearing is already well-known in the related field, so a detailed description thereof will be omitted.

Meanwhile, when an excessive horizontal load or an impact load such as an earthquake is applied, the bi-directional block 20 and the guide rails 12 and 32 move along the throttling direction and the perpendicular direction of the throttle along with the energy dissipating mechanism 40, However, if the limit is reached and the function is lost, there is a serious problem that the damage of the energy dissipating mechanism 40 as well as the upper structure of the bridge is broken, leading to a large accident.

In order to solve the above problems, stoppers (13, 33) for restricting horizontal movement of the bidirectional block (20) are provided at both ends of the guide rails (12, 32) Respectively.

According to the present embodiment, since the bidirectional block 20 moving along the guide rails 12 and 32 is excessively displaced due to a horizontal load or an impact load such as an earthquake, Of course, since the impact is absorbed, the problem of damaging the energy dissipating mechanism 40 due to an excessive horizontal load or an impact load can be minimized, and also the problem of the bridge overhead structure being broken due to the movement restriction can be solved.

In addition, since it is formed integrally with the guide rails 12 and 32 without being separately installed in the upper structure and the lower structure, the installation space can be reduced, the work space can be secured during maintenance, We can expect additional effects that can solve the problem of losing.

If the guide rails 12 and 32 are formed to fit into the first and second guide grooves 21 and 22, the substantial support is not provided by the energy dissipating mechanism 40 but the first and second guide grooves 21 and 22, 22 and the guide rails 12, 32, the bi-directional block 20 and the guide rails 12, 32, which are weak in bearing strength, are inevitably damaged immediately, and the frictional resistance is also relatively large, Therefore, it is possible to easily lose the function and shorten the replacement period, thereby causing frequent maintenance and traffic congestion due to vehicle control.

The guide rails 12 and 32 inserted into the first and second guide grooves 21 and 22 of the bidirectional block 20 are inserted into the first and second guide grooves 21 and 22, 3 to 5 as shown in FIGS.

According to this embodiment, when the seismic isolation device according to the present invention is installed between the lower structure and the upper structure of the bridge, the seismic isolation device is compressed by the weight of the upper structure (refer to FIG. 5) Since the upper structure is supported on the whole, the first and second guide grooves 21 and 22 and the guide rails 12 and 32 have a clearance that can be moved up and down to some extent and smooth horizontal movement is possible, The same problem can be solved at a time.

The operation of the present invention constructed as described above will be described with reference to Figs. 6 to 8. Fig.

FIGS. 7 and 8 are views for explaining the behavior of a seismic isolation apparatus having fall prevention and tensile resistance performance according to the present invention.

The energy dissipating mechanism 40 is positioned between the guide rails 12 of the lower plate 10 and the first guide grooves 12 of the bi- (21) to the guide rail (12) of the lower plate (10).

The guide rail 32 of the upper plate 30 is slidably engaged with the second guide groove 22 of the bi-directional block 20 formed in the direction orthogonal to the first guide groove 21, When the stoppers 13 and 33 are provided at both ends of the guide rails 12 and 32, they are shaped as shown in Fig.

When the seismic isolation device according to the present invention assembled as shown in FIG. 1 is disposed between the lower structure and the upper structure of the bridge, its installation is completed.

6, when the seismic load is generated, the lower plate 10 is moved together with the lower structure. More specifically, the movement in the direction perpendicular to the throttling axis is performed by a guide rail The main body 12 is moved along the guide rail 32 of the top plate 30 via the bidirectional block 20 so that the natural period of the upper structure is lengthened, As the rail 12 moves through the bidirectional block 20, the inherent period of the upper structure is increased so that the seismic load is naturally damped (reduced). As a result, the seismic load transmitted to the upper structure is reduced, Vibration) and distortion can be prevented.

In particular, when an excessive displacement due to a horizontal load or an impact load such as an earthquake occurs, the bidirectional block 20 moving along the guide rails 12 and 32 is urged against the stoppers 13 and 33, The problem of damaging the energy dissipating mechanism 40 due to an excessive horizontal load or an impact load can be minimized and also the problem of the bridge overhead structure being broken due to the movement restriction can be solved.

The above-described series of processes are shown in FIGS. 7 and 8. FIG.

When a seismic load is generated in the diagonal direction between the direction of the throttle axis and the direction perpendicular to the throttle axis, the bottom plate 10 simultaneously moves in the direction perpendicular to the throttling axis (or the direction perpendicular to the throttling axis) The longer period is used to reduce the seismic response of the bridge superstructure.

The guide rails 12 and 32 of the lower plate 10 and the upper plate 30 are inserted into the first guide groove 21 and the second guide groove 22 of the bidirectional block 20, And it is impossible to deviate in the vertical direction.

Therefore, even if the earthquake load and the excessive wind load are transmitted to the upper structure, even if the upper structure receives the tensile force, the problem of falling over due to overturning of the upper structure due to the coupling structure can be minimized.

Although the seismic isolation device according to the present invention is described as being limited to a bridge as a preferred embodiment, it can be applied to a building if necessary.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10: bottom plate 11.31: base 12.32: guide rail
13.33: stopper 20: bidirectional block 21: first guide groove
22: second guide groove 30: top plate 40: energy dissipating mechanism

Claims (3)

A lower plate provided on the upper surface of the lower structure of the bridge, the lower plate being provided with guide rails spaced apart from each other and installed side by side;
A bi-directional block having first and second guide grooves orthogonal to each other and slidably coupled to the guide rail via a first guide groove;
An upper plate having a guide rail slidably installed in a second guide groove of the bidirectional block, the upper plate being installed on the lower surface of the upper structure of the bridge;
And an energy dissipating device disposed between the bottom plate and the top plate for supporting a weight of the upper structure in a gravitational direction while allowing a displacement in a horizontal direction.
The method according to claim 1,
Wherein a stopper for restricting lateral movement of the bidirectional block is further provided at a distal end of the guide rail.
3. The method according to claim 1 or 2,
Wherein the guide rails inserted into the first and second guide grooves of the bidirectional block are formed to be relatively smaller than the first and second guide grooves.

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