CN110276133A - Box girder bridge overturn-preventing based on structural response measurement monitors system - Google Patents
Box girder bridge overturn-preventing based on structural response measurement monitors system Download PDFInfo
- Publication number
- CN110276133A CN110276133A CN201910551259.8A CN201910551259A CN110276133A CN 110276133 A CN110276133 A CN 110276133A CN 201910551259 A CN201910551259 A CN 201910551259A CN 110276133 A CN110276133 A CN 110276133A
- Authority
- CN
- China
- Prior art keywords
- support
- corner
- box girder
- vertical displacement
- bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Evolutionary Computation (AREA)
- Computing Systems (AREA)
- Emergency Management (AREA)
- Signal Processing (AREA)
- Medical Informatics (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention discloses a kind of box girder bridge overturn-preventing monitoring system based on structural response measurement, including multipair vertical displacement sensor, vertical displacement sensor mounted in pairs is at pier top support both ends, continuously acquire the vertical displacement under external loads act at measuring point, the support corner of corresponding position is conversed by vertical displacement, judge whether support comes to nothing according to support corner, further judge that bridge structure whether there is a possibility that toppling risk, the acquisition of monitoring field placement information and network communication system, and deployment information processing analysis turn-key system beyond the clouds.The advantages that present invention, which has, to be calculated simply, and system cost is low, easy for construction, the overturn-preventing suitable for all kinds of box girder bridges monitors.
Description
Technical field
The present invention relates to a kind of bridge health monitoring field, in particular to it is a kind of suitable for all kinds of box girder bridges based on structure
The box girder bridge overturn-preventing of response measurement monitors system.
Background technique
Box girder bridge, especially Single column pier Curved Box-Girder Bridge, are widely used in urban viaduct, interchange overpass and circle
Bridge.But such box bridge is mostly whole lifting structure, center of gravity is higher；Single column pier bridge pier top is relatively narrow, so that between support
Distance is limited, can only even use single support sometimes.Therefore, there is itself resistance to capsizing deficiency in such box bridge.
On the other hand, overload of vehicle problem is got worse and generally, and loaded vehicle or overload vehicle unilateral side load to form the general of the tilting moment that transfinites
Rate is very big, and the potential danger that structure is toppled can not be ignored.In recent years, a lot of box girder bridge capsizing cases have occurred.
The research of existing such box bridge antidumping, calculating and antidumping energy primarily directed to anti-coccidia index
The analysis of power influence factor instructs the calculating of box bridge structure lateral stability to design with this.However, for having built up
Bridge is difficult to situations such as considering overload, abnormal traffic flow thoroughly due to the randomness of vehicular load in design process；Moreover,
Structure drag itself also has uncertainty.So although inclining using anti-coccidia index to the anti-of bridge in design
The ability of covering is provided, but can not ensure structure safety completely in actual use.
About mechanism of toppling studies have shown that the process description that topples of box bridge are as follows: in toppling for automobile and other loads
Under power effect, unidirectional compression support successively comes to nothing to axis outside of toppling without other fulcrums, and Boundary Conditions in Structures fails and loses flat
The process (as shown in Figure 1) of weighing apparatus.Under conditions of the design of the components such as the support of bridge structure, bridge pier is reasonable, performance is intact, beam body
It big corner occurred will lead to portion of standoff to come to nothing, so that it is the premise toppled that beam body, which forms rotating mechanism,.
For the practical safe condition during effectively holding bridge operation, whether accurate evaluation bridge has the wind to topple
Danger avoids, early warning and alarm capsizing case, this is that the application needs improved place emphatically.
Summary of the invention
The technical problems to be solved by the invention provide a kind of box girder bridge overturn-preventing monitoring system based on structural response measurement
System, the overturn-preventing state of monitoring and evaluation box girder bridge, avoid, early warning and alarm capsizing case generation.
In order to solve the above-mentioned technical problems, the present invention provides a kind of box girder bridge overturn-preventing prisons based on structural response measurement
Examining system, the monitoring system include multipair vertical displacement sensor, and vertical displacement sensor mounted in pairs is in pier top support two
End continuously acquires the vertical displacement under external loads act at measuring point, is turned by the support that vertical displacement converses corresponding position
Angle judges whether support comes to nothing according to support corner, further judges that bridge structure whether there is a possibility that toppling risk, prison
Site layout project information collection and network communication system are surveyed, and deployment information processing analysis turn-key system beyond the clouds.
Beam body bottom surface keeps being a flat surface and be in close contact with the top surface of pier top support, and beam body corner is equal to support corner branch
, the vertical displacement at this measuring point is converted into the actual rotational angle of support.
The pier top support includes pier top single support and pier top double support, is to define beam body and support for pier top single support
One side edge is initially separated as seat empty；For pier top double support be define beam body and side support to be completely separated into support de-
It is empty；What Critical angle when support is started to come to nothing was defined as support allows corner.
The support allows corner to gradually become smaller over time, establishes the finger that support allows corner time-varying effecting
Number attenuation model.
The support corner, which is greater than, allows corner, determines that support is now in the state of coming to nothing, thus in the calculating observation period
Seat empty probability.
The bridge structure whether there is a possibility that toppling risk, be to determine bridge structure according to seat empty situation
Practical supporting constraint situation is the critical state toppled when beam body support point-blank forms rotating mechanism.
The vertical displacement that displacement sensor of the invention obtains is scaled the support corner of corresponding position.With support
It does not come to nothing for control condition, analysis obtains support and allows corner.By the corner of actual measurement with allow corner to compare, obtain
Know whether each support of bridge comes to nothing, so that it is determined that the practical supporting constraint situation of bridge structure, further judgement monitoring
Whether bridge has a possibility that toppling.
The present invention considers influence of the rubber material ages to support performance, establishes the finger that support allows corner time-varying effecting
Number attenuation model, makes method of the invention consider the influence of time-varying degradation resistance.
Superior effect of the invention is:
1) displacement sensor required for measuring the present invention is based on structural response is cheap, easy for construction；For such
For the not high beam bridge of cost itself, the cost that the present invention monitors system is low；
2) present invention calculates simply, operand is small, and the continuous real-time for analyzing result is guaranteed in data processing；
3) what is monitored the present invention is based on structural response is structure in all external mobile load (temperature loads, vehicular load
Deng) the lower overall response of effect, the more comprehensively truly actual state of reaction bridge.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 bridge topples mechanism schematic diagram；
Fig. 2 is structural principle block diagram of the invention；
Fig. 3 is the actual environment and sensor arrangement situation that the embodiment of the present invention is mounted on Tongji University's road EN ramp bridge；
Fig. 4 is that the embodiment of the present invention is calculating resulting seat empty probability using Tongji University road EN ramp bridge monitoring data
(with continuous 30 days observation data instances of part of in September, 2017)；
Fig. 4 a is not consider to allow the time-varying effecting of corner；
Fig. 4 b is the time-varying effecting for considering to allow corner；
Fig. 5 is support of embodiment of the present invention actual rotational angle and allows the relationship of corner (to be with 1 number of September in 2017
Example)；
Fig. 6 come to nothing between each support of the embodiment of the present invention probability comparable situation (with part of in September, 2017 continuous 30 days
Observe data instance)；
Fig. 7 is that rubber support deforms schematic diagram；
Fig. 8 is to allow corner exponential decay model；
Figure label explanation
V1-v6-displacement sensor.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.
Fig. 2 shows the structural principle block diagrams of the embodiment of the present invention.As shown in Fig. 2, the present invention provides one kind based on knot
The box girder bridge overturn-preventing of structure response measurement monitors system, and the monitoring system includes multipair vertical displacement sensor, vertical displacement
Sensor mounted in pairs continuously acquires the vertical displacement under external loads act at measuring point, by vertical position at pier top support both ends
The support corner for conversing corresponding position is moved, judges whether support comes to nothing according to support corner, further judges bridge structure
With the presence or absence of topple risk a possibility that, the acquisition of monitoring field placement information and network communication system, and deployment information beyond the clouds
Processing analysis turn-key system.
Portion of standoff comes to nothing, and to form rotating mechanism be the precondition that bridge topples.Coming to nothing rear support cannot be normal
Work, structural stress state are difficult to hold, and stablize the critical state of safety using this state as evaluation antidumping.By guaranteeing branch
Seat, which does not come to nothing, effectively to avoid the generation of bridge capsizing case, controls the present invention is based on support corner and carries out bridge antidumping
Analysis, specific as follows:
1) seat empty control condition:
Rubber support is widely used in box girder bridge, no matter single support or double support is placed on bridge pier, rubber support
Deformation can regard as by support vertically be averaged compressive deformation δcmIt is formed with support rotational deformation θ.When smaller rotation occurs for beam body,
Box beam bottom and rubber support completely attach to, corner, that is, rubber support corner of beam body, with beam body further turn to it is super
The turning power of rubber support is crossed, beam body and seating plane are initially separated.For pier top single support, beam body and support a side are defined
Edge is initially separated as seat empty；For pier top double support, defines beam body and side support is completely separated into seat empty, such as scheme
Shown in 7.
It is learnt by Fig. 7, the case where for pier top single support, to prevent seat empty, needs to meet:
That is:
θ in above-mentioned (2) formula is beam body corner (support corner), and L is support direction across bridge length, δcmAccording to " highway reinforcing bar
Concrete and prestressed concrete bridge contain design specification " regulation of the clause 8.4 of (JTG D62-2004) calculates, it may be assumed that
The case where accordingly, for single support, chooses support corner pilot angle:
Similarly, for pier top double support the case where, support corner pilot angle are as follows:
Wherein, RckFor abutment pressure standard value, teFor support rubber layer overall thickness, AeFor support effective pressure area, EbFor
Rubber elastomer bulk modulus, Eb=2000MPa, EeFor support pressure-proof elasticity modulus, Ee=5.4GeS2, S is support shape system
Number.
Convenient for statement, note support corner pilot angle is θ0:
Seat empty and then bring the risk that bridge topples in order to prevent, during bridge operation, support corner should meet such as
Lower relationship:
θ < θ0 (7)
Based on the reliability analysis of support corner control, by (7) formula and (1) formula, the power function for expressing seat empty can
It indicates are as follows:
Wherein, v1, v2For the shift value that displacement sensor measures, which is stochastic variable caused by external mobile load, θ0It is not
Support allows corner, is considered as constant.
The limit state equation of corresponding seat empty are as follows:
As Z > 0, indicate that support does not come to nothing；
As Z < 0, indicate that support has come to nothing；
As Z=0, indicate that support is in the limiting condition that do not come to nothing also that will come to nothing.
If (8) probability density function of formula Z is fZ(z), then the failure probability of seat empty are as follows:
(10) formula, since the displacement data observed is discrete random variable, is not present for continuous variable
fZ(z) probability density function, (10) formula are written as following form:
Wherein, nfFor the number for making data point of power function (9) formula less than 0 in unit observation time, n is unit sight
Survey the sum of data point in the time.Each support is calculated separately out by formula (11) and occurs the probability to come to nothing in observation time.
(11) what formula calculated is the probability of single seat empty, and single seat empty is simultaneously not equal to entire bridge superstructure
It can topple, because bridge is supported on multiple supports, only when enough seat empties make structure support straight at one
On line, bridge superstructure just will form rotating mechanism and then topple.
2) support allows the time-varying effecting of corner
By (3) formula, support allows the compression modulus E of corner and rubber materiale, bulk modulus EbIt is related, and rubber material is deposited
In problem of aging.Under environmental activity (heat, oxygen etc.), the performance of rubber material can be reduced, to influence the service life of support.
Studies have shown that hardness increases after ageing of rubber, elongation is reduced；Compression modulus EeWith bulk modulus EbIncrease；Support is vertically put down
Equal compressive deformation δcmIt can reduce.Learn that support allows corner also can accordingly reduce by (4), (5) formula again.So rubber support
Allowing corner is the function of time, and over time, the aging of rubber material is constantly deepened, and support allows corner gradually
Become smaller, this is unfavorable to bridge antidumping, it is necessary to take into account support allows the time-varying effecting of corner.
According to the research of existing rubber material ageing of performance rule, bridge rubber bearing appearance is described using exponential function
Perhaps the time-varying effecting of corner, it may be assumed that
θ0,t=θ0e-kt (12)
Wherein, θ0Allow corner for initial time, provided by (4) formula or (5) formula, k be constant to be determined, t be support from
To the time for calculating moment experience from the date of production, unit conversion is day, θ0,tIndicate t moment rear support allows corner.
Since the aging rule for accurately describing rubber material is extremely difficult, the mid-90 in last century, railway science institute
16 years, the 19 years and 22 years board-like supports of natural rubber have been used to do mechanical property and anatomy experiment capital iron clad road,
Support resistance to compression and shear modulus increase separately about 20%, and elongation reduces by 15%~20%.According to the experiment, observe (3)-
(5) formula, support allow corner that will reduce by 30% or so.Therefore, the coefficient k in (12) formula presses following value: support uses 20 years
After (7300d), support allows corner to become the 70% of initial value, then has:
θ0,7300=θ0e-7300k=0.7 θ0 (13)
It solves:
It obtains (14) formula substitution (12) to allow corner attenuation law, as shown in Figure 8.
After considering the time-varying effecting that support allows corner, the power function and failure probability of seat empty are respectively by (8) formula
(11) formula is rewritten are as follows:
Wherein, p in (16) formulaf,tAfter indicating that support dispatches from the factory t days, the failure probability of seat empty in observation period；nf,t
And ntIt is respectively to make power function (15) formula less than total of the number of 0 data point and data point in unit observation time
Number.
By overturn-preventing disclosed in this invention monitoring system deployment in Shanghai Tongji University road EN ramp bridge (as shown in Figure 3), and
By the analysis to monitoring data, the feasibility and validity of the method for the present invention are shown.
Analysis result gives the probability that comes to nothing of daily each support (as shown in Fig. 4 a, Fig. 4 b- Fig. 6), the results showed that
1, after considering the time-varying effecting that support allows corner, the probability that coming to nothing occurs in support is significantly increased, it is foreseeable that with
The continuation aging of rubber material, support turning power can continue to decline, and the risk that the probability and bridge of seat empty topple all will
Increase therewith；
2, the support on the bridge pier of both ends is prior to the seat empty on span centre bridge pier, the first half term of ramp bridge due to sighting distance compared with
Difference, vehicle residence time on bridge is long, and the support on the bridge pier of ring road first half term most easily comes to nothing；
3, single seat empty is not meant to that bridge can topple, but from safety considerations, when single support is de-
Empty probability is excessive should to be caused enough attention and take appropriate measures.
The foregoing is merely preferred embodiments of the invention, are not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of the present invention within.
Claims (6)
1. a kind of box girder bridge overturn-preventing based on structural response measurement monitors system, it is characterised in that: the monitoring system includes
Multipair vertical displacement sensor, vertical displacement sensor mounted in pairs continuously acquire external loads effect at pier top support both ends
Vertical displacement at lower measuring point, the support corner of corresponding position is conversed by vertical displacement, judges support according to support corner
Whether come to nothing, further judges that bridge structure whether there is a possibility that toppling risk, the acquisition of monitoring field placement information and net
Network communication system, and deployment information processing analysis turn-key system beyond the clouds.
2. the box girder bridge overturn-preventing according to claim 1 based on structural response measurement monitors system, it is characterised in that: beam
Body bottom surface keeps being a flat surface and be in close contact with the top surface of pier top support, and beam body corner is equal to support corner seating, this measuring point
The vertical displacement at place is converted into the actual rotational angle of support.
3. the box girder bridge overturn-preventing according to claim 1 based on structural response measurement monitors system, it is characterised in that: institute
Stating pier top support includes pier top single support and pier top double support, is to define beam body and support one side edge is opened for pier top single support
Beginning is separated into seat empty；It is to define beam body and side support is completely separated into seat empty for pier top double support；By support
What Critical angle when starting to come to nothing was defined as support allows corner.
4. the box girder bridge overturn-preventing according to claim 3 based on structural response measurement monitors system, it is characterised in that: institute
That states support allows corner to gradually become smaller over time, establishes the exponential damping mould that support allows corner time-varying effecting
Type.
5. the box girder bridge overturn-preventing according to claim 1 or 3 based on structural response measurement monitors system, feature exists
In: the support corner, which is greater than, allows corner, determines that support is now in the state of coming to nothing, thus support is de- in the calculating observation period
Empty probability.
6. the box girder bridge overturn-preventing according to claim 1 based on structural response measurement monitors system, it is characterised in that: institute
Stating bridge structure whether there is a possibility that toppling risk, be the practical Zhi Chengyue that bridge structure is determined according to seat empty situation
Beam situation is the critical state toppled when beam body support point-blank forms rotating mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910551259.8A CN110276133B (en) | 2019-06-24 | 2019-06-24 | Box girder bridge anti-overturning monitoring system based on structural response measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910551259.8A CN110276133B (en) | 2019-06-24 | 2019-06-24 | Box girder bridge anti-overturning monitoring system based on structural response measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110276133A true CN110276133A (en) | 2019-09-24 |
| CN110276133B CN110276133B (en) | 2023-05-05 |
Family
ID=67961743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910551259.8A Active CN110276133B (en) | 2019-06-24 | 2019-06-24 | Box girder bridge anti-overturning monitoring system based on structural response measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110276133B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350128A (en) * | 2020-03-20 | 2020-06-30 | 浙江省交通规划设计研究院有限公司 | Method and system for monitoring and early warning of overturning risk of beam bridge of single-column pier |
| CN111412829A (en) * | 2020-04-21 | 2020-07-14 | 东南大学 | Real-time monitoring and early warning device for overturning and collapsing of beam bridge |
| CN113310527A (en) * | 2021-06-16 | 2021-08-27 | 深圳防灾减灾技术研究院 | Overload and overturning monitoring and early warning method for single-pier overpass based on comprehensive perception |
| CN113701712A (en) * | 2021-08-09 | 2021-11-26 | 广州建设工程质量安全检测中心有限公司 | Method and device for detecting inclination of main beam when bridge and support are disengaged |
| CN113823069A (en) * | 2021-09-23 | 2021-12-21 | 浙江交工金筑交通建设有限公司 | Be used for continuous case roof beam of variable cross section to prevent toppling construction monitoring early warning system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160225155A1 (en) * | 2015-01-29 | 2016-08-04 | Industry-Academic Cooperation Foundation, Yonsei University | System and method for image-based structural health monitoring suitable for structures having uncertain load conditions and support conditions |
| CN109916358A (en) * | 2019-03-05 | 2019-06-21 | 广西天道信息技术有限公司 | High-speed rail bridge support and beam-ends gap automatic monitoring device and its detection method |
-
2019
- 2019-06-24 CN CN201910551259.8A patent/CN110276133B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160225155A1 (en) * | 2015-01-29 | 2016-08-04 | Industry-Academic Cooperation Foundation, Yonsei University | System and method for image-based structural health monitoring suitable for structures having uncertain load conditions and support conditions |
| CN109916358A (en) * | 2019-03-05 | 2019-06-21 | 广西天道信息技术有限公司 | High-speed rail bridge support and beam-ends gap automatic monitoring device and its detection method |
Non-Patent Citations (2)
| Title |
|---|
| 汪瑞: "钢箱梁桥抗倾覆稳定性关键技术研究", 《城市道桥与防洪》 * |
| 陈瑶: "独柱墩桥梁抗倾覆稳定验算方法及参数影响分析", 《浙江交通职业技术学院学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350128A (en) * | 2020-03-20 | 2020-06-30 | 浙江省交通规划设计研究院有限公司 | Method and system for monitoring and early warning of overturning risk of beam bridge of single-column pier |
| CN111412829A (en) * | 2020-04-21 | 2020-07-14 | 东南大学 | Real-time monitoring and early warning device for overturning and collapsing of beam bridge |
| CN113310527A (en) * | 2021-06-16 | 2021-08-27 | 深圳防灾减灾技术研究院 | Overload and overturning monitoring and early warning method for single-pier overpass based on comprehensive perception |
| CN113310527B (en) * | 2021-06-16 | 2022-05-20 | 深圳防灾减灾技术研究院 | Single pier overpass overload and overturning monitoring and early warning method based on comprehensive perception |
| CN113701712A (en) * | 2021-08-09 | 2021-11-26 | 广州建设工程质量安全检测中心有限公司 | Method and device for detecting inclination of main beam when bridge and support are disengaged |
| CN113701712B (en) * | 2021-08-09 | 2024-02-02 | 广州建设工程质量安全检测中心有限公司 | Method and device for detecting inclination of main beam when bridge and support are in void |
| CN113823069A (en) * | 2021-09-23 | 2021-12-21 | 浙江交工金筑交通建设有限公司 | Be used for continuous case roof beam of variable cross section to prevent toppling construction monitoring early warning system |
| CN113823069B (en) * | 2021-09-23 | 2023-08-04 | 浙江交工金筑交通建设有限公司 | Monitoring and early warning system for anti-overturning construction of variable-section continuous box girder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110276133B (en) | 2023-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110276133A (en) | Box girder bridge overturn-preventing based on structural response measurement monitors system | |
| Xu et al. | Buffeting-induced fatigue damage assessment of a long suspension bridge | |
| CN106436557B (en) | Method for improving anti-overturning performance of single-pier bridge | |
| CN107687924A (en) | The safe early warning method and system of a kind of bridge | |
| CN106702909B (en) | A kind of double width steel box-girder entirety swivel structure and construction method | |
| CN106012791B (en) | Three across the antinode steel concretes of work beam shear wave three combine T-shaped continuous beam | |
| Muller | The bi-stayed bridge concept: Overview of wind engineering problems | |
| CN112818444A (en) | Railway concrete bridge linear real-time control method based on operation and driving safety | |
| Ma et al. | Defect investigation and replacement implementation of bearings for long-span continuous box girder bridges under operating high-speed railway networks: A case study | |
| CN103147405A (en) | Method for erecting steel girder of cable-stayed bridge with diagonal main trusses | |
| CN104389263A (en) | High-speed railway bridge wind blocking structure | |
| CN206667029U (en) | A kind of hybrid structure of arch and beam formula concrete continuous girder bridge structure | |
| Jiawei et al. | Dynamic analysis of swivel construction method under multi-variable coupling effects | |
| Jensen | Cable-supported bridges: Design, maintenance, rehabilitation and management | |
| Cheng et al. | Bearing Repair and Monitoring for Poyanghu Cable‐Stayed Bridge | |
| Sung et al. | A study on damage assessment of the scoured bridges | |
| Rosvall et al. | Induced stresses from lifting and moving highway bridges with self-propelled modular transporters | |
| Zhao et al. | Cable Replacement Scheme for Low Tower Cable-Stayed Bridges Based on Sensitivity Analysis | |
| CN107588809A (en) | A kind of frictional high-strength bolts in rod member connecting node come off recognition methods | |
| CN103268397B (en) | RC simple T beam bridge bearing capacity rapid method for assessment based on fracture height | |
| Leto | PRELIMINARY DESIGN OF THE MESSINA STRAIT BRIDGE. | |
| Yao et al. | Intelligent transportation operation and maintenance integrated processing data collection and information analysis | |
| Wang et al. | The Future Direction of Bridge Seismic Research-Intelligence and Resilience | |
| Seim | Why bridges have failed throughout history | |
| Yao et al. | Intelligent monitoring and control method of the life-cycle cable-stayed bridge with steel-concrete composite beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |