KR102300119B1 - Bridge Safety Diagnosis System And Safety Diagnosis Method Using The Bridge Supporter's Movement Amount And The Distance Between Bridges Detection - Google Patents

Abstract

The present invention relates to a bridge safety diagnosis system through detection of bridge bearing movement amount and laying gap distance, and safety diagnosis method using same, and more particularly, to a bridge safety diagnosis system comprising a laying gap distance measuring device, a bridge bearing movement amount measuring device, and a safety diagnosis server. The laying gap distance measuring device is fixedly installed in the central part of the vertical plane of the lower surface of a slab facing a parapet wall in a bridge upper structure facing the parapet wall. After detecting the distance from the parapet wall by a laser sensor, the detected data is transmitted to the safety diagnosis server through wired/wireless communication. An object of the present invention is to provide a safety diagnosis system and a method that can secure both economic feasibility and strong safety.

Description

Bridge Safety Diagnosis System And Safety Diagnosis Method Using The Bridge Supporter's Movement Amount And The Distance Between Bridges Detection

The present invention relates to a bridge safety diagnosis system and a safety diagnosis method using the same by detecting the amount of movement of the bridge bearing and the distance between the bearings, and more particularly, it comprises a device for measuring the distance between the bearings, a device for measuring the amount of movement of the bridge bearings, and a safety diagnosis server, The intercostal distance measuring device is fixedly installed in the central part on the vertical plane of the lower surface of the slab facing the alternating chest wall in the bridge superstructure facing the alternating chest wall, after detecting the distance to the alternating chest wall by the laser sensor Data is transmitted to the safety diagnosis server by wired/wireless communication, and the bridge bearing movement measuring device is installed on the railing of the upper surface of the wall where the bridge bearing is installed, and the lower part of the bridge bearing is horizontally irradiated by a laser sensor to measure the distance, , for the upper part of the bridge support, the distance is measured by giving a gradient toward a certain point of the upper part of the bridge support, and the measured data is transmitted to the safety diagnosis server by wire/wireless communication, and the safety diagnosis server is the Data and average temperature data from the server of the Korea Meteorological Administration until 24 hours before the detected time of the area where the bridge is located are transmitted and stored through wired/wireless communication, and the data of the allowable movement of the bridge bearing for each bridge bearing subject to a predetermined safety diagnosis is stored. Calculate the actual movement amount of the bridge bearing based on the data stored in the storage unit and the data storage unit, and calculate the results according to the formula for calculating the movement amount of the bridge bearing and the formula for the expansion and contraction movement of the inter-oil distance, but the following 1)- The conditions a, 1)-b are selected and applied according to the elongation or contraction according to the season, and the corresponding signal is output according to the condition satisfaction and dissatisfaction, respectively, by determining whether the condition is satisfied, 2) Detecting the amount of movement of the bridge bearing and the distance between the bearings, characterized in that it comprises a calculation unit that determines whether a condition is satisfied and outputs a corresponding signal according to the condition satisfaction and dissatisfaction, respectively, and a display unit that displays the output signal of the calculation unit to the outside It relates to a bridge safety diagnosis system and a safety diagnosis method using the same.

1)-a During extension (summer season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing + movement amount of detection

1)-b During contraction (winter season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing - movement amount detected

2) Inter-oil distance elongation movement according to formula ≤ Inter-oil distance actual measurement

In general, for structures such as bridges, when five years have elapsed after completion, structural safety diagnosis is conducted to evaluate the safety of bridge structures.

For this purpose, the safety of bridge structures must be evaluated, and bridge management is required to prevent major accidents in advance even for bridges that have passed a certain period of time after completion.

However, at present, it is true that there are many difficulties in safety diagnosis because there is no standardized measurement method for large structures such as bridges.

In general, in a bridge among road structures, a number of upper plates are installed and connected on a steel box, and the connection parts of these upper plates have a certain width so that the structure can cope with the phenomenon of expansion and contraction by itself due to changes in external temperature caused by seasonal changes. An expansion joint is formed, and when the amount of change of the expansion joint changes to a safety value or more, it is directly related to the safety of the bridge, so it is necessary to check and check frequently.

Expansion joints are the items that require the most frequent design changes, and it is common for detailed discussions on expansion joints to take place when the entire process has been completed. After completion of construction, frequent defects occur due to excessive oil gap, inappropriate standard selection, and errors such as Pre-Setting.

In particular, if the structure in the area where the expansion joint is installed is not properly spaced, durability is reduced due to unstable support conditions, and corrosion occurs on the upper part of the bridge and the support due to leakage due to loss of waterproofing function, which significantly affects the lifespan and safety of the entire bridge. As a result, in long-distance bridges, structures must be constructed based on the interval suggested in each product specification, and the biggest failure factor at each site is the failure to adjust the interval. It cannot be excluded that the installation stage is almost in a critical path state in terms of process, and there is a risk of insolvency.

In the previous gap check of expansion joints, effective bridge safety diagnosis could not be taken as the bridge manager took periodic measurements using separate measuring tools along the work passages provided on both sides of the lower part of the bridge. There was always the risk of manager's safety accident, and there were many inconvenient problems in management.

A detection sensor capable of monitoring internal cracks in a building structure is disclosed in Korean Patent Laid-Open Publication No. 10-2000-0065831, the detection sensor is made by penetrating an optical fiber cable through a body made of the same material as the structure (concrete). It is provided to be embedded in a structure, and this detection sensor is intended to break or deform when the structure is internally cracked and cause a virtual error in its optical transmission function, that is, the structure in which the detection sensor is embedded is one end of the optical fiber cable. It is possible to monitor internal cracks in the base structure according to the presence or absence of laser light or changes in the amount of light by receiving laser light emitted from the other end and incident laser light from the sensor. , it can be monitored at all times only when the embedded fiber optic cable is safely constructed and well-preserved, and there is a problem that it cannot be reused or restored if there is a problem at one end of the fiber optic cable buried there due to internal cracks in the structure.

In addition, bridges are generally in the form of structures in which a deck is placed on a pier, and regardless of the construction method, the pier, the deck supported by the pier, and the bridge bearing placed between the pier and the pier to absorb the impact caused by the rolling of the top plate (Generally referred to as a bridge support device in one or less cases), wherein the bridge support is between the pier and the upper plate, while absorbing the vibration or impact force generated by the upper plate and expanding or contracting according to the temperature change. It is a means with a buffering function that can receive displacement, so that the external force generated from the top plate does not reach the pier or abutment.

A seat device for a bridge equipped with a safety diagnosis system is disclosed in Korean Patent Registration No. 10-1140735, so that the deformation progress of the elastic pad constituting the seat device can be sequentially checked according to the degree of progress. Although we provide bridge seating devices equipped with a safety diagnosis system that allows managers to easily determine whether or not there is an abnormality in the device and when to replace the device, the problem of having too many configurations for each number of bridge devices, the initial construction cost and Excessive maintenance cost is easily expected, so it is not a reasonable solution.

Registered Patent No. 10-2000-0065831 (Title of the invention: detection sensor capable of monitoring internal cracks in building structures) Registered Patent No. 10-1140735 (Title of the invention: Bridge device equipped with safety diagnosis system)

An object of the present invention is to provide a system for diagnosing bridge safety by comparing the allowable amount of movement of bridge bearings according to calculation of the actual measurement through the measurement of the amount of movement of the bridge bearing and the amount of movement between the bearings and the amount of elongation between the bearings, and a safety diagnosis method using the same.

Another object of the present invention is to provide a safety diagnosis system and method for ensuring both economical efficiency and strong safety by diagnosing the safety of a bridge with a minimum of equipment and devices.

Another object of the present invention is to enable the measurement within a very short time, and to ensure the safety of the user because the measurement person does not need to be in the measurement position where the actual sensor or the like is located.

The present inventor's bridge safety diagnosis system through the detection of the movement amount of the bridge bearing and the distance between the bearings is configured to include a device for measuring the distance between the bearings, the device for measuring the amount of movement of the bridge bearing, and a safety diagnosis server.

The intercostal distance measuring device is fixedly installed in the central part on the vertical plane of the lower surface of the slab facing the alternating chest wall in the bridge superstructure facing the alternating chest wall, after detecting the distance to the alternating chest wall by the laser sensor Data is transmitted to the safety diagnosis server by wired/wireless communication.

The bridge bearing movement measuring device is installed on the railing of the upper surface of the wall where the bridge bearing is installed, and the distance is measured by horizontally irradiating the lower part of the bridge bearing by a laser sensor, and a certain point of the upper part of the bridge bearing is measured for the upper part of the bridge bearing. It measures the distance by giving a gradient to the direction and transmits the measured data to the safety diagnosis server by wired/wireless communication.

The safety diagnosis server receives and stores the data detected every time preset by the user and the average temperature data up to 24 hours before the detected time of the area where the bridge is located from the Meteorological Administration server through wired/wireless communication, and stores it, and performs a predetermined safety diagnosis The actual movement amount of the bridge bearing is calculated based on the data storage unit in which the allowable movement amount data of the bridge bearing for each bridge bearing is stored and the data stored in the data storage unit, and calculated according to the formula for calculating the movement amount of the bridge bearing and the distance between the bridges and the expansion and contraction movement formula to derive the result value, but select and apply any one of the following conditions 1)-a, 1)-b according to the elongation or contraction according to the season, and determine whether the conditions are satisfied or dissatisfied, respectively. Including a display unit that outputs a corresponding signal and outputs the corresponding signal according to the condition satisfaction and dissatisfaction respectively by determining whether the condition is satisfied 2) regarding the following interval distance, and a display unit that displays the output signal of the operation unit to the outside characterized in that it is composed.

1)-a During extension (summer season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing + movement amount of detection

1)-b During contraction (winter season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing - movement amount detected

2) Inter-oil distance elongation movement according to formula ≤ Inter-oil distance actual measurement

으로 정해진다.The formula for the allowable movement amount of the bridge bearing calculated from the safety diagnosis server is Equation

is determined as

는 온도 변화에 따른 이동량을 의미하는 것으로서, 수학식

로 정의되고,

는 회전에 의한 이동량을 의미하는 것으로서, 수학식

로 정의된다.remind

is the movement amount according to the temperature change,

is defined as

is the amount of movement by rotation,

is defined as

는 온도 변화(콘크리트 교량 -5 ~ 35 ℃, 강재 교량 -10 ~ 40 ℃ 범위)를 의미하되 검측 당시 현재 온도 변화는 검측시로부터 24시간전 부터 검측시까지의 검측 지역의 평균온도를 기준으로 하여 정해지되 수축경우는 온도 변화 범위 중 최하온도와 평균온도의 차가 되며, 신장 경우는 온도 변화 범위 중 최고온도와 평균온도의 차가 되며, L은 지간장을 mm 단위로 환산한 것을 의미하며, α는 선팽창계수로서 콘크리트 교량 경우에는 1x10^-5, 강재 교량 경우에는 1.2x10^-5의 값을 가진다.remind

is the temperature change (concrete bridge -5 ~ 35 ℃, steel bridge -10 ~ 40 ℃ range), but the current temperature change at the time of detection is based on the average temperature of the detection area from 24 hours before detection However, in the case of contraction, it is the difference between the lowest temperature and the average temperature in the temperature change range, and in the case of elongation, it is the difference between the highest temperature and the average temperature in the temperature change range. As a coefficient of linear expansion, it has a value of 1x10^-5 for concrete bridges and 1.2x10^-5 for steel bridges.

는 콘크리트 거더일 경우는 1/300, 강재 거더일 경우는 1/150 값으로 입력되는 상수값이다.The h means converting the value of 2/3 of the height of the girder or the height of the beam into a mm value,

is a constant value input as 1/300 in case of concrete girder and 1/150 in case of steel girder.

으로 정해진다.The formula for the amount of elongation and movement between the interstitial distances calculated from the safety diagnosis server is Equation

is determined as

는 온도 변화에 따른 이동량을 의미하는 것으로서, 수학식

로 정의되고,

는 회전에 의한 이동량을 의미하는 것으로서, 수학식

로 정의된다.remind

is the movement amount according to the temperature change,

is defined as

is the amount of movement by rotation,

is defined as

는 온도 변화를 의미하며 검측시로부터 24시간전 부터 검측시까지의 검측 지역의 평균온도를 기준으로 하되 콘크리트 교량 경우는 35 ℃에서 상기 평균 온도를 뺀 값, 강재 교량 경우는 40℃ 에서 상기 평균 온도를 뺀 값을 의미하며, L은 지간장을 mm 단위로 환산한 것을 의미하며, α는 선팽창계수로서 콘크리트 교량 경우에는 1x10^-5, 강재 교량 경우에는 1.2x10^-5의 값을 가진다.remind

is the temperature change, based on the average temperature of the detection area from 24 hours before the detection to the time of detection. For a concrete bridge, the value obtained by subtracting the above average temperature from 35 ℃, and for a steel bridge, the average temperature at 40 ℃ It means the value minus , L means the conversion of span length in mm, and α is the coefficient of linear expansion, which is 1x10^-5 in the case of a concrete bridge and 1.2x10^-5 in the case of a steel bridge.

는 콘크리트 거더일 경우는 1/300, 강재 거더일 경우는 1/150 값으로 입력되는 상수값이다.The h means converting the value of 2/3 of the height of the girder or the height of the beam into a mm value,

is a constant value input as 1/300 in case of concrete girder and 1/150 in case of steel girder.

The bridge safety diagnosis method using the bridge safety diagnosis system by detecting the movement amount of the bridge support and the distance between the bridges is

a step of calculating the amount of movement of the bridge bearing and the amount of extension of the distance between the bridges according to the corresponding formula;

Detecting the actual movement amount of the bridge bearing using the bridge bearing movement measuring device to measure the movement amount of the bridge bearing;

Calculating the actual measurement amount of the oil-to-oil distance using an oil-to-oil distance measuring device;

A bridge that determines whether the predetermined allowable movement amount of the bridge bearing is equal to or greater than the sum of the calculated movement amount of the bridge bearing and the detected movement in summer season, and whether the allowable movement of the bridge bearing is greater than or equal to the value obtained by subtracting the detected movement from the calculated value of the movement of the bridge bearing in winter Determining whether the support range of the allowable movement amount;

Determining whether or not the inter-oil distance elongation movement amount is abnormal in the inter-oil distance elongation movement amount calculated in the inter-oil distance extension movement amount calculated in the bridge bearing allowable movement amount and the inter-oil distance extension movement amount calculation step;

If the condition is satisfied in the step of determining whether the range of movement of the bearing support is normal, the determination and output step of determining whether the bridge bearing is normal and outputting it to the outside;

a bridge bearing abnormality determination and output step of determining an abnormality when the condition is not satisfied in the determination step of whether the range of the allowed movement amount of the bridge bearing is present and outputting it to the outside;

If the condition is satisfied in the determining whether the distance between the breasts is abnormal in the elongation and movement amount, the normal determination and output step of determining whether it is normal and outputting it to the outside;

an abnormality determination and output step of determining an abnormality in the case of dissatisfaction with the condition in the determination step of determining whether an abnormality of the intercostal distance elongation and movement is abnormal and outputting it to the outside; and

an end step of terminating the bridge safety diagnosis; is composed of

The present invention has the following effects.

(1) The present invention diagnoses bridge safety by comparing the allowable amount of bridge bearing movement and the elongation movement amount between the bridge bearings according to the calculation of the actual measurement through the measurement of the bridge bearing movement and the inter-oil distance, so it is very simple and quick to diagnose the safety of the bridge. to be able to judge

(2) The present invention enables the diagnosis of bridge safety with minimum equipment and devices to ensure both economical efficiency and strong safety.

(3) The present invention enables measurement within a very short time, and there is no need for the person to be measured at the actual position where the sensor is located, thereby preventing a user's safety accident.

1 is a view schematically showing a bridge safety diagnosis system through the present inventors' bridge bearing movement amount and oil-to-oil distance detection.
2 is a view schematically showing the actual measurement of the movement amount of the bridge bearing and the distance between the bridges, respectively, through the bridge safety diagnosis system through the detection of the amount of movement of the bridge bearing and the distance between the supports of the present invention.
3 is a diagram graphically showing how the bridge bearing movement amount can be determined in relation to the measured distance.
4 is a view showing the safety diagnosis method using the bridge safety diagnosis system through the present inventors' bridge bearing movement amount and inter-oil distance detection in time series steps.

First, prior to entering into the detailed description of the present invention, if it is determined that the detailed description of the known technology or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the terms to be described later are terms defined in consideration of the function in the present invention, which may vary depending on the intention or custom of the user or operator, so the definition is "through the detection of the movement amount of the bridge support and the distance between the Bridge safety diagnosis system and safety diagnosis method using the same" should be made based on the content throughout this specification.

The terminology used herein is for the purpose of referring to specific embodiments only, and is not intended to limit the invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite.

The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or component. It does not exclude the presence or addition of groups.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms defined in the dictionary are further interpreted as having a meaning consistent with the related art literature and the presently disclosed content, and unless defined, are not interpreted in an ideal or very formal meaning.

1 is a diagram schematically showing a bridge safety diagnosis system through the inventors' bridge bearing movement amount and inter-oil distance detection, and FIG. 2 is a bridge bearing movement amount and It is a diagram schematically showing the actual measurement of the amount of expansion and contraction between the spans, and FIG. 3 is a diagram graphically showing how the amount of movement of the bridge bearing can be determined in relation to the measured distance, and FIG. It is a diagram showing the safety diagnosis method using the bridge safety diagnosis system through time series steps.

Referring to FIG. 1 , the present inventor's bridge safety diagnosis system by detecting the amount of movement of the bridge bearing and the distance between the bearings is configured to include a device for measuring the distance between the intervals 100 , the device for measuring the amount of movement of the bridge bearing 200 , and a safety diagnosis server.

1 and 2, the inter-interval distance measuring device 100 is fixedly installed in the central part on the vertical plane of the lower surface of the slab facing the alternating chest wall in the bridge superstructure (BS) facing the alternating chest wall, the laser sensor After detecting the distance from the alternating chest wall (meaning the interstitial distance (BSD)), the detected data is transmitted to the safety diagnosis server through wired/wireless communication.

1 to 3, the bridge bearing movement measuring device 200 is installed on the railing of the upper surface of the wall where the bridge bearing (RP) is installed, and the lower part of the bridge bearing is horizontally irradiated by a laser sensor to measure the distance, , for the upper part of the bridge support, the distance is measured by giving a gradient toward a certain point on the upper part of the bridge support, and the measured data is transmitted to the safety diagnosis server by wired/wireless communication.

Referring to FIG. 3 , the height of the bridge bearing (RP) is a, the horizontal distance b of the bridge bearing, and the diagonal distance c by the laser sensor.

The process for finding x is as follows, and it goes without saying that this formula development process is programmed in the calculation unit of the safety diagnosis server.

(1) sinθ = a/c

(2) θ=sin^-1(a/c)

(3) cosθ=x/c

(4) x=c·cosθ

(5) x=c cos(sin^-1(a/c))

(6) Bridge bearing movement = b - c cos(sin^-1(a/c))

The actual movement distance derivation by this calculation process is simple and economical because the physical size of the bridge bearing movement measurement apparatus 200 including the laser sensor can be greatly reduced.

The safety diagnosis server (not shown and unsigned) transmits data detected every time preset by the user and average temperature data from the Meteorological Administration server to 24 hours before the detected time in the area where the bridge is located through wired/wireless communication The data storage unit in which the allowable movement data of the bridge bearing for each bridge bearing subject to safety diagnosis is stored and the actual movement amount of the bridge bearing is calculated based on the data stored in the data storage unit, and the bridge bearing movement amount calculation formula and the interval According to the distance expansion and contraction movement formula, the result is calculated, but the conditions 1)-a, 1)-b for the following bridge bearings are selected and applied according to the seasonal extension or contraction, and the satisfaction is determined. to output a corresponding signal according to condition satisfaction and dissatisfaction, respectively, and to determine whether the 2) condition regarding the following interval is satisfied and output a corresponding signal according to the condition satisfaction and dissatisfaction, respectively, and the output signal of the operation unit It is characterized in that it is configured to include a display unit for displaying to the outside.

1)-a During extension (summer season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing + movement amount of detection

1)-b During contraction (winter season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing - movement amount detected

2) Inter-oil distance elongation movement according to formula ≤ Inter-oil distance actual measurement

The amount of movement of the bridge bearing follows the formula determined below, which will be described in detail below.

으로 정해진다.The formula for the allowable movement amount of the bridge bearing calculated from the safety diagnosis server is Equation

is determined as

는 온도 변화에 따른 이동량을 의미하는 것으로서, 수학식

로 정의되고,

는 회전에 의한 이동량을 의미하는 것으로서, 수학식

로 정의된다.remind

is the movement amount according to the temperature change,

is defined as

is the amount of movement by rotation,

is defined as

는 온도 변화(콘크리트 교량 -5 ~ 35 ℃, 강재 교량 -10 ~ 40 ℃ 범위)를 의미하되 검측 당시 현재 온도 변화는 검측시로부터 24시간전 부터 검측시까지의 검측 지역의 평균온도를 기준으로 하여 정해지되 수축경우는 온도 변화 범위 중 최하온도와 평균온도의 차가 되며, 신장 경우는 온도 변화 범위 중 최고온도와 평균온도의 차가 되며, L은 지간장을 mm 단위로 환산한 것을 의미하며, α는 선팽창계수로서 콘크리트 교량 경우에는 1x10^-5, 강재 교량 경우에는 1.2x10^-5의 값을 가진다.remind

is the temperature change (concrete bridge -5 ~ 35 ℃, steel bridge -10 ~ 40 ℃ range), but the current temperature change at the time of detection is based on the average temperature of the detection area from 24 hours before detection However, in the case of contraction, it is the difference between the lowest temperature and the average temperature in the temperature change range, and in the case of elongation, it is the difference between the highest temperature and the average temperature in the temperature change range. As a coefficient of linear expansion, it has a value of 1x10^-5 for concrete bridges and 1.2x10^-5 for steel bridges.

The value corresponding to the difference between the lowest temperature and the average temperature during contraction will be a - value, and the value corresponding to the difference between the highest temperature and the average temperature during extension will be a + value. The sum of the calculated values of the movement amount by

The calculated value of the movement of the bridge bearing thus obtained becomes a (-) value, but when 1)-b is contracted (winter season), the allowable movement of the bridge bearing ≥ the calculated amount of the movement of the bridge bearing - When substituting it into the detection movement formula, it must be converted to a (+) value. This is because the allowable movement of the bridge bearing is also substituted with a + value.

는 콘크리트 거더일 경우는 1/300, 강재 거더일 경우는 1/150 값으로 입력되는 상수값이다.The h means converting the value of 2/3 of the height of the girder or the height of the beam into a mm value,

is a constant value input as 1/300 in case of concrete girder and 1/150 in case of steel girder.

으로 정해진다.The formula for the amount of elongation and movement between the interstitial distances calculated from the safety diagnosis server is Equation

is determined as

는 온도 변화에 따른 이동량을 의미하는 것으로서, 수학식

로 정의되고,

는 회전에 의한 이동량을 의미하는 것으로서, 수학식

로 정의된다.remind

is the movement amount according to the temperature change,

is defined as

is the amount of movement by rotation,

is defined as

는 온도 변화를 의미하며 검측시로부터 24시간전 부터 검측시까지의 검측 지역의 평균온도를 기준으로 하되 콘크리트 교량 경우는 35 ℃에서 상기 평균 온도를 뺀 값, 강재 교량 경우는 40℃ 에서 상기 평균 온도를 뺀 값을 의미하며, L은 지간장을 mm 단위로 환산한 것을 의미하며, α는 선팽창계수로서 콘크리트 교량 경우에는 1x10^-5, 강재 교량 경우에는 1.2x10^-5의 값을 가진다.remind

is the temperature change, based on the average temperature of the detection area from 24 hours before the detection to the time of detection. For a concrete bridge, the value obtained by subtracting the above average temperature from 35 ℃, and for a steel bridge, the average temperature at 40 ℃ It means the value minus , L means the conversion of span length in mm, and α is the coefficient of linear expansion, which is 1x10^-5 in the case of a concrete bridge and 1.2x10^-5 in the case of a steel bridge.

는 콘크리트 거더일 경우는 1/300, 강재 거더일 경우는 1/150 값으로 입력되는 상수값이다.The h means converting the value of 2/3 of the height of the girder or the height of the beam into a mm value,

is a constant value input as 1/300 in case of concrete girder and 1/150 in case of steel girder.

Referring to Figure 4, the bridge safety diagnosis method using the bridge safety diagnosis system through the detection of the distance between the bridge bearing movement and

A step (S100) of calculating the allowable movement amount of the bridge bearing and the amount of extension of the distance between the bridge bearings according to the corresponding formula (S100);

A bridge bearing actual movement amount detecting step (S110) of actually measuring the bridge bearing movement amount using a bridge bearing movement amount measuring device;

Calculating the actual measurement amount of the inter-oil distance using an inter-oil distance measuring device (S210);

A bridge that determines whether the predetermined allowable movement amount of the bridge bearing is equal to or greater than the sum of the calculated movement amount of the bridge bearing and the detected movement in summer season, and whether the allowable movement of the bridge bearing is greater than or equal to the value obtained by subtracting the detected movement from the calculated value of the movement of the bridge bearing in winter Determining whether the support range of the allowable movement amount (S120);

Determining whether or not the inter-oil distance elongation movement amount is greater than the inter-oil distance extension movement amount calculated in the inter-oil distance extension movement amount calculated in the bridge bearing allowable movement amount and the inter-oil distance extension movement amount calculation step (S220);

If the condition is satisfied in the step of determining whether the range of the allowed movement amount of the bridge bearing is satisfied, the bridge bearing normal determination and output step of outputting it to the outside (S130a);

If the condition is not satisfied in the determination step of whether the range of the allowed movement amount of the bridge bearing is abnormal, the determination and output step of determining an abnormality and outputting it to the outside (S130b);

If the condition is satisfied in the determination of whether the inter-milk distance elongation and movement is abnormal, it is determined as normal and the inter-interval distance is normal determination and output step (S230a) of outputting it to the outside;

In the case of dissatisfaction with the condition in the determination of whether the amount of movement is abnormal in the distance between the breasts, an abnormal determination and output step (S230b) of determining an abnormality and outputting it to the outside; and

an end step of terminating the bridge safety diagnosis; is composed of

(1) For example, for a concrete bridge with span span of 100000 mm and beam height of 2300 mm, the current temperature change is determined based on 13 degrees, and assuming that the allowable movement of the bridge support is 53 mm and the movement of detection is -22 mm, the following is determined as

는 최대 수축시 -5 - 13 = -18℃, 최대 신장시 35 - 13 = 22℃로 정해짐에 따라, 최대 수축될 경우의 계산 신축량은 -18*100000*1x10^-5 = -18mm이고, 최대 신장될 경우의 계산 신축량은 22*100000*1x10^-5=22mm이며,

는 2/3*2300*1/300=5.1mm로 계산됨에 따라 수축시 계산 이동량은 -12.9mm(공식 산입시 + 값 내지 절대값으로 계산), 신장시 계산 이동량은 27.1mm로 계산되는데, 동절기의 수축 경우에 해당되므로, In other words

is determined as -5 - 13 = -18℃ at maximum contraction and 35 - 13 = 22℃ at maximum elongation. The calculated stretch amount for maximum elongation is 22*100000*1x10^-5=22mm,

is calculated as 2/3*2300*1/300=5.1mm, so the calculated movement amount during contraction is -12.9mm (calculated as a + value or absolute value during official calculation), and the calculated movement amount during extension is calculated as 27.1mm. As it corresponds to the case of contraction of

During contraction (winter season), the allowable movement of the bridge bearing ≥ the calculated amount of movement of the bridge bearing - According to the detected movement, the condition of 53 ≥ 12.9 + 22 is satisfied.

If the value (calculated amount of movement of bridge bearing - movement amount detected) becomes larger than the allowable movement value of bridge bearing, it is judged as abnormal. will have to proceed

(2) For example, assuming that the current temperature change is determined based on 13 degrees for a steel bridge with a span length of 50000 mm and a beam height of 3500 mm, the amount of elongation and movement between spans is determined as follows.

는 최대 신장시 40 - 13 = 27℃로 정해짐에 따라, 최대 신장될 경우의 신장량은 27*50000*1.2x10^-5=16.2mm가 되며,

는 2/3*3500*1/150=15.6mm가 된다.In other words

is determined as 40 - 13 = 27℃ at maximum elongation, so the elongation at maximum elongation is 27*50000*1.2x10^-5 = 16.2mm,

is 2/3*3500*1/150=15.6mm.

In other words, since the amount of movement between the breasts is 16.2+15.6=31.8mm, if the actual measured amount of the distance between the breasts is 31.8mm or more, a safety diagnosis is made, and if it is less than that, an abnormality is judged. If the result does not change after passing through, the implementation process for bridge safety is carried out.

The present invention has the following effects.

(1) The present invention compares the allowable amount of movement of the bridge bearing according to the calculation of the amount of movement of the bridge bearing and the actual measurement through the measurement of the inter-oil distance and the expansion and contraction movement of the inter-oil distance to diagnose the safety of the bridge. to be able to judge

(2) The present invention enables the diagnosis of bridge safety with minimum equipment and devices to ensure both economical efficiency and strong safety.

(3) The present invention enables measurement within a very short time, and there is no need for the person to be measured at the actual position where the sensor is located, thereby preventing a user's safety accident.

BS: bridge superstructure A: abutment
RP : Bridge bearing BSD : Interval distance
100: Interval distance measuring device
200: Bridge bearing movement amount measuring device

Claims (4)

In the bridge safety diagnosis system by detecting the movement amount of the bridge support and the distance between the
The bridge safety diagnosis system is
It consists of a distance measuring device, a bridge bearing movement measuring device, and a safety diagnosis server.
The intercostal distance measuring device is fixedly installed in the central part on the vertical plane of the lower surface of the slab facing the alternating chest wall in the bridge superstructure facing the alternating chest wall, after detecting the distance to the alternating chest wall by the laser sensor Data is transmitted to the safety diagnosis server by wire/wireless communication,
The bridge bearing movement measuring device is installed on the railing of the upper surface of the wall where the bridge bearing is installed, and the distance is measured by horizontally irradiating the lower part of the bridge bearing by a laser sensor, and a certain point of the upper part of the bridge bearing is measured for the upper part of the bridge bearing. It measures the distance by giving a gradient toward the
The safety diagnosis server receives and stores the data detected every time preset by the user and the average temperature data up to 24 hours before the detected time of the area where the bridge is located from the Meteorological Administration server through wired/wireless communication, and stores it, and performs a predetermined safety diagnosis The actual movement amount of the bridge bearing is calculated based on the data storage unit in which the allowable movement amount data of the bridge bearing for each bridge bearing is stored and the data stored in the data storage unit, and calculated according to the formula for calculating the movement amount of the bridge bearing and the distance between the bridges and the expansion and contraction movement formula to derive the result value, but select and apply any one of the following conditions 1)-a, 1)-b according to the elongation or contraction according to the season, and determine whether the conditions are satisfied or dissatisfied, respectively. Including a display unit that outputs a corresponding signal and outputs the corresponding signal according to the condition satisfaction and dissatisfaction respectively by determining whether the condition is satisfied 2) regarding the following interval distance, and a display unit that displays the output signal of the operation unit to the outside Bridge safety diagnosis system through the detection of the distance between the bridge bearing movement and the oil, characterized in that it is configured.
1)-a During extension (summer season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing + movement amount of detection
1)-b During contraction (winter season), allowable movement of bridge bearing ≥ Calculation amount of movement of bridge bearing - movement amount detected
2) Inter-oil distance elongation movement according to formula ≤ Inter-oil distance actual measurement The method according to claim 1,
The formula for calculating the amount of movement of the bridge bearing calculated from the safety diagnosis server is

is determined as

is the movement amount according to the temperature change,

is defined as

is the amount of movement by rotation,

is defined as

is the temperature change (concrete bridge -5 ~ 35 ℃, steel bridge -10 ~ 40 ℃ range), but the current temperature change at the time of detection is based on the average temperature of the detection area from 24 hours before detection However, in the case of contraction, it is the difference between the lowest temperature and the average temperature in the temperature change range, and in the case of elongation, it is the difference between the highest temperature and the average temperature in the temperature change range. As a coefficient of linear expansion, it has a value of 1x10^-5 in the case of a concrete bridge and 1.2x10^-5 in the case of a steel bridge,
h means that 2/3 of the girder height or beam height is converted into mm value,

A bridge safety diagnosis system by detecting the movement amount of the bridge bearing and the distance between the bridges, characterized in that it is a constant value that is input as 1/300 in the case of a concrete girder and 1/150 in the case of a steel girder. The method according to claim 1,
The formula for the amount of elongation and movement between the interstitial distances calculated from the safety diagnosis server is Equation

is determined as

is the movement amount according to the temperature change,

is defined as

is the amount of movement by rotation,

is defined as

is the temperature change, based on the average temperature of the detection area from 24 hours before the detection to the time of detection. For a concrete bridge, the value obtained by subtracting the above average temperature from 35 ℃, and for a steel bridge, the average temperature at 40 ℃ means the value subtracted, L means the conversion of span length in mm, and α is the coefficient of linear expansion, which is 1x10^-5 in the case of a concrete bridge and 1.2x10^-5 in the case of a steel bridge,
h means that 2/3 of the girder height or beam height is converted into mm value,

A bridge safety diagnosis system by detecting the movement amount of the bridge bearing and the distance between the bridges, characterized in that it is a constant value that is input as 1/300 in the case of a concrete girder and 1/150 in the case of a steel girder. The method for diagnosing bridge safety using the bridge safety diagnosis system by detecting the amount of movement of the bridge bearing according to any one of claims 1 to 3 and the distance between oil and gas.
a step of calculating the amount of movement of the bridge bearing and the amount of extension of the distance between the bridges according to the corresponding formula;
Detecting the actual movement amount of the bridge bearing using the bridge bearing movement measuring device to measure the movement amount of the bridge bearing;
Calculating the actual measurement amount of the oil-to-oil distance using an oil-to-oil distance measuring device;
A bridge that determines whether the predetermined allowable movement amount of the bridge bearing is equal to or greater than the sum of the calculated movement amount of the bridge bearing and the detected movement in summer season, and whether the allowable movement of the bridge bearing is greater than or equal to the value obtained by subtracting the detected movement from the calculated value of the movement of the bridge bearing in winter Determining whether the support range of the allowable movement amount;
Determining whether or not the inter-oil distance elongation movement amount is abnormal in the inter-oil distance elongation movement amount calculated in the inter-oil distance extension movement amount calculated in the bridge bearing allowable movement amount and the inter-oil distance extension movement amount calculation step;
If the condition is satisfied in the step of determining whether the range of movement of the bearing support is normal, the determination and output step of determining whether the bridge bearing is normal and outputting it to the outside;
a bridge bearing abnormality determination and output step of determining an abnormality when the condition is not satisfied in the determination step of whether the range of the allowed movement amount of the bridge bearing is present and outputting it to the outside;
If the condition is satisfied in the determining whether the distance between the breasts is abnormal in the elongation and movement amount, the normal determination and output step of determining whether it is normal and outputting it to the outside;
an abnormality determination and output step of determining an abnormality in the case of dissatisfaction with the condition in the determination step of determining whether an abnormality of the intercostal distance elongation and movement is abnormal and outputting it to the outside; and
an end step of terminating the bridge safety diagnosis; A bridge safety diagnosis method using a bridge safety diagnosis system by detecting the amount of movement of the bridge support and the distance between the bridges, characterized in that it consists of.

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