KR102506948B1 - Supporting body, measuring device, and measuring method - Google Patents

Abstract

A load supporting member 5 disposed between the upper shoe 3 fixed to the upper structure of the structure and the lower shoe 2 fixed to the lower structure of the structure and supporting the load applied from the upper structure side of the structure provide In addition, according to the change in the distance between the upper shoe 3 and the lower shoe 2 in the direction in which the upper shoe 3 and the lower shoe 2 overlap with the load supporting member 5 interposed therebetween, Proximity sensors 10 and 11 for measuring physical quantities are provided.

Description

Supporting body, measuring device, and measuring method

The present invention relates to a support body disposed between a superstructure and a lower structure of a structure such as a bridge or a building, and a technique for measuring a change in force due to a load applied to the support body.

Conventionally, in structures such as bridges and buildings, a support body (hereinafter simply referred to as a support body) is disposed between an upper structure and a lower structure. For example, in a bridge on which moving objects such as cars and trains run, supports are arranged between a bridge girder (upper structure) and a bridge pier (lower structure). Jiseung is a member that supports the load from the upper structure and transmits it to the lower structure. To the support, a dead load due to the weight of the girder or a live load due to a vehicle traveling on the girder is applied.

In recent years, there has been a demand to measure the reaction force of the ground for the maintenance of structures and the like. The reaction force of the support is changed by deterioration of the support, subsidence of the substructure, fluctuation of the substructure, and the like. That is, by measuring the reaction force of the support and obtaining its change, it is possible to determine whether a problem such as deterioration of the support, subsidence of the substructure, fluctuation of the substructure, etc. has occurred.

As a knowledge capable of measuring reaction force, there is one disclosed in Patent Literature 1, for example. The knowledge disclosed in Patent Literature 1 is a laminated rubber formed by alternately laminating steel plates and rubber layers composed of thick upper and lower steel plates and a plurality of thin-walled intermediate steel plates, a load that supports the load applied from the bridge girder side to the pier side It is a rubber support made as a support member. The laminated rubber is provided with a plurality of measuring holes that penetrate from one of the upper and lower steel plates in the thickness direction and reach the inside of the adjacent rubber layer, and fill each measuring hole with a viscous fluid, and the steel plate side of each measuring hole. It is a configuration in which a pressure sensor is installed in the part and the corresponding measurement hole is closed.

Japanese Patent No. 4891891

However, the knowledge disclosed in Patent Literature 1 includes a process of providing a plurality of measurement holes for attaching pressure sensors to laminated rubber as a load-bearing member, a process of filling each measurement hole with a viscous fluid, and a pressure sensor in each measurement hole. It is manufactured by performing the process of attaching to the steel plate side part, and the process of closing each measuring hole provided with the pressure sensor. That is, in the case of Jiseung described in Patent Literature 1, the manufacturing process of laminated rubber as a load bearing member was complicated.

An object of the present invention is to provide a support body capable of measuring a physical quantity such as a reaction force according to an applied load and having a simple manufacturing process.

Another object of the present invention is to provide a technique capable of measuring a change in force corresponding to a load applied to a supporting body.

In order to achieve the above object, the support body of the present invention is configured as follows.

The upper shoe is fixed to the upper structure of the structure, and the lower shoe is fixed to the lower structure of the structure. The load supporting member is disposed between the upper shoe and the lower shoe and supports a load applied from the upper structural side of the structure. Further, the sensor measures a target distance that changes according to a change in the distance between the upper shoe and the lower shoe in the direction in which the upper shoe and the lower shoe overlap with the load supporting member interposed therebetween.

In the target distance that changes according to the change in the distance between the upper shoe and the lower shoe,

(1) Distance between upper and lower structures

(2) Distance between lower shoe and upper structure

(3) Distance between upper shoe and lower structure

(4) Distance between upper shoe and lower shoe

etc.

A change in the distance between the upper shoe and the lower shoe is a change in deformation of the load supporting member. For this reason, the reaction force of the support body (load supporting member) can be calculated by using the target distance measured by the sensor and the Young's modulus E of the load supporting member.

Therefore, by continuously or periodically measuring the target distance that changes according to the change in the distance between the upper shoe and the lower shoe by the sensor, it is possible to obtain a change in reaction force or the like of the support body. Then, by using the obtained change in the reaction force of the supporting body, etc., maintenance of the structure can be performed simply and appropriately.

In addition, the sensor may be installed on any of the upper shoe, the lower shoe, the upper structure of the structure, or the lower structure of the structure, as long as it can measure the target distance that changes according to the change in the distance between the upper shoe and the lower shoe.

In particular, if the sensor is installed on one side of the upper shoe or the lower shoe, and the object to be measured by the sensor is installed on the other side of the upper shoe or the lower shoe, the upper shoe and the lower shoe It is possible to measure the reference value of the target distance that changes according to the change in the distance of the shoe. Using this reference value, the size of the dead load due to the upper structure of the structure can be obtained when installed between the upper structure and the lower structure of the structure.

In addition, the number of sensors may be 1 or plural. When the number of sensors is plural, it is preferable to install them on both sides with the load supporting member interposed therebetween.

Further, the measuring device of the present invention calculates a change in the reaction force of the support body or the like from a measured value of a target distance that changes according to a change in the distance between the upper shoe and the lower shoe by the sensor.

Further, according to the measurement method of the present invention, it is possible to simply measure the object distance that changes according to the change in the distance between the upper shoe and the lower shoe by means of a sensor.

According to the present invention, it is possible to simplify the manufacturing process of the supporting body capable of measuring physical quantities related to the reaction force or the like according to the applied load.

In addition, it is possible to easily measure physical quantities related to the reaction force or the like according to the load applied to the supporting body.

1 is a schematic cross-sectional view of an elevated road bridge in the bridge axis direction.
2 is a schematic cross-sectional view of an elevated road bridge in a direction perpendicular to a bridge axis.
Fig. 3(A) is a schematic plan view of the branch viewed from the bridge axis direction, and Fig. 3(B) is a cross-sectional view in the AA direction in Fig. 3(A).
Fig. 4(A) is a cross-sectional view in the BB direction in Fig. 3(A), and Fig. 4(B) is a cross-sectional view in the CC direction in Fig. 3(A).
Fig. 5 is a diagram showing knowledge about another example.
6(A) and (B) are diagrams showing knowledge relating to another example.
7 (A) and (B) are diagrams showing knowledge regarding another example.
8 is a schematic diagram illustrating a monitoring system.
Fig. 9 is a block diagram showing the configuration of main parts of the reaction force measuring device.
Fig. 10 is a block diagram showing the configuration of main parts of the management device.
11 is a flowchart showing the operation of the reaction force measuring device.
Fig. 12 is a diagram showing measurement data stored in a storage unit.
Fig. 13 is a diagram showing the relationship between the measurement time and the amount of change ΔR in the reaction force R of the jiseung.
Fig. 14 shows the maximum value of the amount of change ΔR of the reaction force R of the power (1).
Fig. 15 is a diagram showing the frequency of the change amount ΔR of the reaction force R of the power 1.
Fig. 16 is a diagram showing a procedure of a reaction force measuring method.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described. First, an embodiment of a propagation body (hereinafter simply referred to as a propagation body) will be described.

BACKGROUND OF THE INVENTION [0002] Jiseung is a member that is placed between the upper structure and lower structure of a structure such as a bridge or a building to support the load of the upper structure. Jiseung dampens the vibration of the upper structure and transmits it to the lower structure.

1 is a schematic cross-sectional view of an elevated road bridge (bridge) as a structure in a bridge axis direction (vehicle traveling direction). Fig. 2 is a schematic cross-sectional view of an elevated road bridge in a direction perpendicular to a bridge axis (vehicle width direction). In the elevated road bridge, the support 1 is arranged between the pier 100 as a lower structure and the main girder 101 as an upper structure. The piers 100 are arranged at appropriate intervals in the bridge axis direction. In the upper structure, a road surface, a side wall, etc. on which vehicles run are formed on a top plate provided on the upper surface (opposite surface to the pier side) of the main girder 101. The support (1) supports the load of the superstructure including the main girder (101). The support 1 supports a dead load due to the weight of the superstructure or a live load due to vibration caused by the weight of a vehicle traveling on the road or the relative displacement of the superstructure with respect to the lower structure. In this example, as shown in FIG. 2, on the upper surface of the pier 100 (opposite surface to the main girder 101), three supports 1 are arranged in a direction perpendicular to the bridge axis and fixed.

Fig. 3(A) is a schematic plan view of the branch viewed from the bridge axis direction, and Fig. 3(B) is a cross-sectional view in the A-A direction in Fig. 3(A). 4(A) is a B-B direction cross-sectional view in FIG. 3(A), and FIG. 4(B) is a C-C direction cross-sectional view in FIG. 3(A). Jiseung 1 includes a lower shoe 2, an upper shoe 3, a base plate 4, a load supporting member 5, proximity sensors 10 and 11, and installation metal members 20 and 21 ) is provided.

The support 1 is overlapped in the order of the upper shoe 3, the load supporting member 5, the lower shoe 2, and the base plate 4 from the side of the main girder 101.

The upper shoe 3 is fixed to the main girder 101. In addition, the base plate 4 is fixed to the pier 100 by anchor bolts or the like not shown. The lower shoe (2) is attached to the base plate (4). That is, the lower shoe 2 is fixed to the pier 100 via the base plate 4. In the support 1, as in this example, if there is one in which the lower shoe 2 and the base plate 4 are constituted by each member, the lower shoe 2 and the base plate 4 are constituted by one member. There is also. The support 1 may be composed of the lower shoe 2 and the base plate 4 by individual members, or may be composed of the lower shoe 2 and the base plate 4 by one member. Further, in the lower shoe 2, a concave portion (recess) is formed on the opposite side of the pier 100 (the opposite side of the main girder 101).

In the load supporting member 5, the end on the pier 100 side is inserted into the concave portion of the lower shoe 2, and the end on the main girder 101 side protrudes from the concave portion of the lower shoe 2. . The load supporting member 5 and the upper shoe 3 are in contact with each other on opposite surfaces. Between the lower shoe 2 and the upper shoe 3, the load supporting member 5 is positioned, and the lower shoe 2 and the upper shoe 3 are not in contact. The load supporting member 5 is a member that supports a horizontal force (horizontal load) due to the relative displacement of the upper shoe 3 and the lower shoe 2 in the horizontal direction (the bridge axis direction or the direction perpendicular to the bridge axis), or a vertical force. It is composed of a member or the like that supports a force in a direction (vertical load).

In addition, the support 1 may be provided with a side block (not shown) that limits the amount of relative displacement of the upper shoe 3 and the lower shoe 2 in the horizontal direction.

In addition, the knowledge 1 of this example has provided the two proximity sensors 10 and 11 to the lower shoe 2. Proximity sensors 10, 11 may be any sensors that can measure the distance from the detection surface of the proximity sensors 10, 11 to the detection target object (corresponding to the target distance referred to in the present invention) in a non-contact manner. do. As the proximity sensors 10 and 11, the sensors described in http://www.fa.omron.co.jp/products/family/1457/ may be used, for example.

The proximity sensors 10 and 11 are installed on both sides of the support 1 with the load supporting member 5 interposed therebetween. Proximity sensors 10 and 11 are arranged in a direction perpendicular to the bridge axis. Proximity sensors 10 and 11 are attached to mounting metal members 20 and 21 attached to the lower shoe 2 . The mounting metal members 20 and 21 are fixed to the lower shoe 2 . These proximity sensors 10 and 11 measure the distance from the detection surface to the facing surface of the main girder 101. The detection surfaces of the proximity sensors 10 and 11 face the bottom surface of the main girder 101. The proximity sensors 10 and 11 in this example measure the distance between the lower shoe 2 and the upper structure (main girder 101).

In the support 1, when a load is applied from the superstructure side, the load supporting member 5 is deformed. Therefore, when the load applied to the support 1 changes from the superstructure side, the amount of deformation of the load supporting member 5 changes, and as a result, the distance between the pier 100 and the facing surface of the main girder 101 is changed The amount of change in the distance between the pier 100 and the opposite surface of the main girder 101 and the amount of change in the distance between the lower shoe 2 and the upper structure (main girder 101) are the same. In addition, the amount of change in the distance between the opposing surfaces of the pier 100 and the main girder 101 and the amount of change in the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2 are the same. That is, the amount of change in the distance between the lower shoe 2 and the upper structure (main girder 101) measured by the proximity sensors 10 and 11 is the distance between the upper shoe 3 and the opposing surface of the lower shoe 2 is the change in

The reaction force measurement device 50 described later determines the amount of change Δx in the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2,

Δx=(Δx1+Δx2)/2

calculated by Δx1 is the amount of change in the distance from the detection surface of the proximity sensor 10 to the opposite surface of the main girder 101,

Δx1 = reference distance of proximity sensor 10 - measurement distance of proximity sensor 10

calculated by In addition, Δx2 is the amount of change in the distance from the detection surface of the proximity sensor 11 to the opposite surface of the main girder 101,

Δx2 = reference distance of proximity sensor 11 - measurement distance of proximity sensor 11

calculated by The standard distance of the proximity sensors 10 and 11 should just be the distance measured by each proximity sensor 10 and 11 at the time of installation of the support 1, etc. In addition, as described above, the proximity sensors 10 and 11 are arranged in a direction orthogonal to the bridge axis with the load supporting member 5 interposed therebetween. Then, the amount of change Δx1 of the distance from the detection surface of the proximity sensor 10 to the opposite surface of the main girder 101 and the amount of change Δx2 of the distance from the detection surface of the proximity sensor 11 to the opposite surface of the main girder 101 The average of is calculated as the amount of change Δx in the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2. Therefore, in the amount of change Δx of the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2, the difference in the amount of change in the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2 in the direction perpendicular to the bridge axis (Difference between Δx1 and Δx2) can be canceled.

In this way, this knowledge 1 can measure the amount of change Δx of the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2. Further, when the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2 is shortened by Δx, the amount of change ΔR in the reaction force R of the load supporting member 5 is,

ΔR=E×Δx

am. However, E is the Young's modulus of the load supporting member 5. That is, this knowledge 1 can also measure the change in reaction force R of the load supporting member 5.

In addition, the distance measured by the proximity sensors 10 and 11 is not particularly limited as long as it is a distance that changes according to a change in the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2. For example, as shown in FIG. 5, the proximity sensors 10 and 11 are installed on the upper shoe 3, and the detection surface of the proximity sensors 10 and 11 and the opposite surface of the base plate 4 It may be configured to measure the distance. Moreover, as shown in FIG. 6(A), while attaching the proximity sensors 10 and 11 to the lower shoe 2, the detection target object 30 facing the detection surface of the proximity sensors 10 and 11 , 31) may be attached to the upper shoe 3 to measure the distance between the detection surfaces of the proximity sensors 10 and 11 and the opposing surfaces of the detection targets 30 and 31 . Moreover, as shown in FIG. 6(B), while attaching the proximity sensors 10 and 11 to the upper shoe 3, the detection target object 30 facing the detection surface of the proximity sensors 10 and 11 , 31) may be installed on the lower shoe 2 to measure the distance between the detection surfaces of the proximity sensors 10 and 11 and the opposing surfaces of the detection targets 30 and 31 .

In addition, the number of proximity sensors installed in the jiseung 1 and their arrangement are not particularly limited. For example, the Jiseung 1 may have a configuration in which two proximity sensors 10 and 11 are installed as shown in Fig. 7(A), and four proximity sensors 10, 11, 12 and 13 As shown in FIG. 7(B), a configuration may be provided.

5 and 6 are views seen from the same direction as FIG. 3(A), and FIG. 7 is a sectional view in a direction corresponding to FIG. 4(B).

Next, an embodiment of the reaction force measurement device (corresponding to the measurement device in the present invention) will be described. Here, the knowledge 1 shown in FIG. 3 is taken as an example.

Fig. 8 is a schematic diagram showing a monitoring system using the reaction force measuring device according to this example. This monitoring system includes a plurality of reaction force measurement devices 50 and a management device 60 . Each reaction force measurement device 50 is communicatively connected to the management device 60 via a network 70 . In this example, the reaction force measuring device 50 and the support 1 are matched one-to-one. The reaction force measuring device 50 calculates the reaction force of the associated support 1 (load supporting member 5), and notifies the management device 60 of the calculation result via the network 70.

The management device 60 is installed in a management office or the like that manages the condition of the bridge. In this management device 60, the administrator checks the state of each branch 1, and the like.

Fig. 9 is a block diagram showing the configuration of main parts of the reaction force measuring device. The reaction force measurement device 50 includes a control unit 51, a sensor processing unit 52, a storage unit 53, and a communication unit 54.

The controller 51 controls the operation of each part of the body of the reaction force measuring device 50.

The sensor processing unit 52 is connected to the proximity sensors 10 and 11 of the Ji Seung 1. The sensor processing unit 52 receives measurement signals from the proximity sensors 10 and 11 (the measurement distance from the detection surface to the opposing surface). As described above, the proximity sensors 10 and 11 measure the distance from the detection surface to the facing surface of the main girder 101. The sensor processing unit 52 processes the measurement signal inputted from the proximity sensor 10 or 11 for each proximity sensor 10 or 11 that is connected, and calculates the amount of change ΔR of the reaction force R of the power 1. circuitry (in this example, two processing circuits). The sensor processing unit 52 includes an input unit and an arithmetic unit according to the present invention.

The storage unit 53 stores the reference distance of the proximity sensors 10 and 11, measurement data, and the like.

The communication unit 54 controls communication with the management device 60 via the network 70 and transmits measurement data stored in the storage unit 53 to the management device 60 .

In addition, each reaction force measuring device 50 is provided with an identification code for identifying its own device. As described above, since the reaction force measurement device 50 and the support 1 are associated on a one-to-one basis, the corresponding support 1 can be specified from the identification code of the reaction force measurement device 50.

Fig. 10 is a block diagram showing the configuration of main parts of the management device. The management device 60 includes a control unit 61, an operation unit 62, a display unit 63, a storage unit 64, and a communication unit 65.

The control unit 61 controls the operation of each unit of the main body of the management device 60.

An input device such as a mouse or keyboard is connected to the operation unit 62 . An operator performs an input operation to the main body of the management apparatus 60 by operating an input device connected to the operation unit 62 . The operation unit 62 receives an input to the main body of the management device 60 .

A display device such as a liquid crystal display is connected to the display unit 63 . The display unit 63 controls screen display on the connected display device.

The storage unit 64 stores various parameters and the like used for controlling the operation of the main body of the management device 60.

The communication unit 65 controls communication with the reaction force measuring device 50 via the network 70.

The operation of the reaction force measuring device 50 will be described below.

11 is a flowchart showing the operation of the reaction force measuring device. The reaction force measurement device 50 measures the measured value of the distance from the detection surface to the opposite surface of the main girder 101, measured by the proximity sensors 10 and 11, at a predetermined measurement time interval a (for example, 20msec interval) and repeatedly acquired. When the reaction force measurement device 50 acquires the measured value of the distance from the detection surface to the opposite surface of the main girder 101 measured by the proximity sensors 10 and 11 (s1), the upper shoe 3 and the lower The amount of change Δx of the distance between the opposing surfaces of the shoe 2 is calculated (s2).

As described above, the variation Δx of the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2 is

Δx=(Δx1+Δx2)/2

am. In addition, Δx1 and Δx2 are

Δx1 = reference distance of proximity sensor 10 - measurement distance of proximity sensor 10

Δx2 = reference distance of proximity sensor 11 - measurement distance of proximity sensor 11

am.

The reaction force measuring device 50 stores the reference distance of the proximity sensor 10 and the reference distance of the proximity sensor 11 in the storage unit 53 .

The reaction force measuring device 50 uses the amount of change Δx of the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2 calculated in s2 to calculate the amount of change ΔR of the reaction force R of the support 1 (s3) . The change in reaction force R, ΔR, is

ΔR=E×Δx

am. However, E is the Young's modulus of the load supporting member 5.

The reaction force measuring device 50 is the distance from the detection surface measured by the proximity sensors 10 and 11 at the measurement time, s1, to the opposite surface of the main girder 101, the upper shoe 3 and the lower shoe calculated at s2 A record (current measurement result) in which the amount of change Δx of the distance between the opposing surfaces in (2) and the amount of change ΔR of the reaction force R of the load supporting member 5 calculated in s3 are correlated (s4), back to s1

Fig. 12 is a diagram showing measurement data stored in a storage unit. In FIG. 12, it is an example in the case where measurement time interval a is set to 20 msec. 12, Sa# (#=1, 2, 3...) is the measured distance to the opposite surface of the main girder 101 by the proximity sensor 10, and Sb# is the proximity sensor 11 is the measured distance to the opposite surface of the main girder 101 by In addition, ave# is the amount of change Δx of the distance between the opposing surfaces of the upper shoe 3 and the lower shoe 2 calculated in s2. In addition, ΔR# is the amount of change ΔR of the reaction force R of the power (1) calculated in s3.

In addition, the reaction force measurement device 50 transmits the measurement data stored in the storage unit 53 by the communication unit 54 to the management unit 60 when a predetermined notification timing arrives. This notification timing may be set every day or every several hours.

The management device 60 receives the measurement data transmitted from the reaction force measuring device 50 at the communication unit and stores it in the storage unit 64 .

In addition, the management device 60 processes measurement data stored in the storage unit 64 (measured data transmitted from the reaction force measurement device 50) according to the operator's input operation in the operation unit 62. And the processing result is displayed on the display unit 63.

For example, the management device 60 displays the relationship between the measurement time and the amount of change ΔR in the reaction force R of the control unit 1 on the display unit 63 according to the operator's input operation on the operation unit 62. do Fig. 13 is a diagram showing the relationship between the measurement time and the amount of change ΔR in the reaction force R of the jiseung. In Fig. 13, the horizontal axis is the measurement time, and the vertical axis is the magnitude of the change ΔR of the reaction force R of the support (1). In FIG. 13 , the place where the amount of change ΔR of the reaction force R of the support 1 is large is the timing when the axle load of the running vehicle is applied to the support 1 . The amount of change ΔR of the reaction force R of the support 1 changes according to the magnitude of the live load.

In addition, the reaction force measurement device 50 can also obtain the magnitude of the live load (for example, the axle load of the vehicle running) by the amount of change ΔR of the reaction force R of the support 1. The magnitude of the live load is

Live Load=ΔR×A/H

can be calculated by However, A is an area where the load supporting member 5 is pressed by the upper shoe 3 (a contact area between the upper shoe 3 and the load supporting member 5). In addition, H is the length (height) of the load bearing member 5 in the vertical direction (the direction in which the upper shoe 3 and the lower shoe 2 are aligned).

In addition, the reaction force measurement device 50 may display the data shown in FIG. 14 or FIG. 15 on the display unit 63 according to the operator's input operation on the operation unit 62 . Fig. 14 shows the maximum value of the amount of change ΔR of the reaction force R of the power (1). 15 is a diagram showing the frequency of the change amount ΔR of the reaction force R of the power 1. 14 is a graph in which the maximum value of the change ΔR of the reaction force R of the power (1) within the detection time is plotted for each detection time, with the detection time interval set to, for example, 5 minutes or 10 minutes.

In addition, if it is the support 1 of the structure shown in FIG. 6, the distance between the detection surface measured by the proximity sensor 10 and the detection target object 30 in the state in which no load is applied to this support 1 By making the distance between the detection surface measured by the proximity sensor 11 and the detection target 31 the reference distance of the proximity sensor 10 as the reference distance of the proximity sensor 10, the dead load (load of the upper structure) By, the reaction force R of Jiseung (1) can be obtained.

In addition, even with the support 1 installed on the existing bridge, the amount of change ΔR of the reaction force R can be measured with respect to this support 1.

Specifically, as shown in FIG. 16 , the proximity sensors 10 and 11 are placed on the opposite surfaces of the upper shoe 3 and the lower shoe 2 to the support 1 that measures the amount of change ΔR of the reaction force R. It is installed so that it can measure the target distance that changes according to the change in the distance between the spaces (s11). Further, the proximity sensors 10 and 11 are connected to the reaction force measurement device 50 (s12). Then, the reaction force measuring device 50 is caused to execute the processing shown in FIG. 11 .

Thereby, the amount of change ΔR of the reaction force R can be measured also for the support 1 installed on the existing bridge.

In this case, the reference distance of the proximity sensors 10 and 11 may be the distance measured by the proximity sensors 10 and 11 at a timing when no live load is applied to the support 1 .

In this way, according to the change in the distance between the upper shoe 3 and the lower shoe 2 in the direction in which the upper shoe 3 and the lower shoe 2 overlap with the load supporting member 5 interposed therebetween. By a simple method of installing the proximity sensors 10 and 11 that measure the changed object distance, it is possible to measure a physical quantity related to a reaction force or the like according to an applied load.

1 : Jiseung
2: lower shoe
3: upper shoe
4 : base plate
5: load supporting member
10 to 13: proximity sensor
20, 21: installation metal member
30, 31: object to be detected
50: reaction force measurement device
51: control unit
52: sensor processing unit
53: storage unit
54: Ministry of Communications
100: Pier
101: main girder

Claims (10)

An upper shoe fixed to the superstructure of the bridge;
A lower shoe fixed to the lower structure of the bridge;
a load supporting member disposed between the upper shoe and the lower shoe and supporting a load applied from the upper structure side of the bridge;
It is provided on one side of the upper shoe or the lower shoe, and according to a change in the distance between the upper shoe and the lower shoe in the direction in which the upper shoe and the lower shoe overlap with the load supporting member interposed therebetween. Equipped with a sensor for non-contact measurement of the changed distance to the target;
The support body, wherein the sensors are provided on both sides in a direction orthogonal to the bridge axis with the load supporting member interposed therebetween. According to claim 1,
The sensor measures the distance to a measurement target object installed on the other side of the upper shoe or the lower shoe, where the sensor is not installed, in a non-contact manner as the target distance. an input unit for inputting the target distance measured by the sensor of the support body according to claim 1;
and an arithmetic unit for processing the target distance input to the input unit and calculating an amount of change in force according to a load applied to the load supporting member. According to claim 3,
The measuring device, wherein the calculation unit calculates an amount of change in the reaction force of the load supporting member. It is disposed between the upper structure and the lower structure of the bridge, and measures the force according to the load applied to the load supporting member with respect to the support overlapping in the order of the upper shoe, the load supporting member, and the lower shoe from the superstructure side. is a measurement method,
a sensor for non-contactly measuring a target distance that changes according to a change in the distance between the upper shoe and the lower shoe in a direction in which the upper shoe and the lower shoe overlap with the load supporting member interposed therebetween; Or installed on one side of the lower shoe,
A calculation unit processes the target distance measured by the sensor and calculates a magnitude of force according to a load applied to the load supporting member;
The measuring method, wherein the sensors are provided on both sides in a direction orthogonal to the throttle axis with the load supporting member interposed therebetween. According to claim 5,
The measuring method according to claim 1 , wherein the calculator calculates an amount of change in reaction force of the load supporting member. delete delete delete delete

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