CN208938508U - A kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation - Google Patents
A kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation Download PDFInfo
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- CN208938508U CN208938508U CN201821114730.4U CN201821114730U CN208938508U CN 208938508 U CN208938508 U CN 208938508U CN 201821114730 U CN201821114730 U CN 201821114730U CN 208938508 U CN208938508 U CN 208938508U
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Abstract
The utility model provides the scale (model) test device of a kind of monitoring continuous rigid frame bridge temperature and mobile load deformation, including reduced scale box beam and it is used to support the thin-wall piers that reduced scale box beam is fixedly connected below reduced scale box beam, the upper surface of reduced scale box beam is placed with clump weight, the side of reduced scale box beam is provided with opening, changes in temperature air blower described in changes in temperature air blower of the reduced scale box beam opening side setting towards opening setting, reduced scale box beam span centre has reaction frame, reduced scale box beam has the box beam amesdial for being provided with and being respectively used to measurement box beam end horizontal deformation and span centre vertical deformation towards reduced scale box beam away from one end of changes in temperature air blower and reduced scale box beam span centre lower part, thin-wall piers upper end side has the bridge pier amesdial for measuring the deformation of thin-wall piers top horizontal, the utility model simulator can reflect that middle span deflexion cracking occurs for practical continuous rigid frame bridge When suffered tired vehicular load, solve the disadvantages of other monitoring methods period is long, and complexity is high, monitoring instrument difficult arrangement.
Description
Technical field
The utility model relates to the scale (model) test devices of a kind of monitoring continuous rigid frame bridge temperature and mobile load deformation.
Background technique
Continuous rigid frame bridge is the continuous bridge of bridge pier and girder consolidation, since its bridge type is simple and beautiful, good integrity, and driving
Comfortable and design theory and construction technology are more mature, deep to be liked by Bridge Design person, in the economic span model of 100-300m
In enclosing, it has also become most competitive one of bridge type on highway bridge.However, current most of companies through runing after a period of time
All there are many diseases in continuous rigid frame bridge, and wherein the cracking of box beam bottom caused by the excessive downwarp of span centre has become bridge type harm most
Big disease, box beam bottom reduces the rigidity of box beam after cracking, and exacerbates middle span deflexion, forms a kind of vicious circle.
In order to guarantee bridge using safe, at present engineering circles use increase external prestressing, affixing steel plate, sticking carbon fiber plus
The various methods such as thick web, newly-increased steel frame are reinforced, though these methods alleviate continuous rigid frame bridge to a certain extent
Cracking and downwarp situation, but there is downwarp and new stress crack again at several years post-reinforcing, reinforcing repeatedly produces height
High maintenance cost, investigation shows that the maintenance and reinforcement expense of part continuous rigid frame bridge has been even more than and builds cost, until current
Until, the excessive downwarp of continuous rigid frame bridge span centre and box beam bottom cracking are still an engineering difficulty for having perplexed science of bridge building teacher
Topic.
The problem of continuous rigid frame bridge span centre excessive downwarp, not yet solves so far, the health monitoring in relation to the bridge increasingly by
To the attention of engineers and technicians.Deflection of bridge span is assessment one of bridge health situation and the key factor of safety, and continuous
The bearing capacity of rigid frame bridge, stiffness variation and internal force distribution are closely related, amount of deflection cross senior general directly affect road-ability and
Safety, therefore safe early warning can be played the role of by being monitored to deflection of bridge span, be had very important significance.At present to continuous
The health monitoring of rigid frame bridge generally by sensor embedding in bridge structure, carries out the bridge structure deformation in operation long-term
Real time on-line monitoring assesses the safety of bridge, however sensor can only be adopted according to the health status of Analysis on monitoring data bridge
Collect the corresponding variate of box beam, then the relative deformation value of box beam is obtained by strain calculation, can not directly measure box beam in temperature
Absolute deformation value under degree and the loads such as automobile, also complexity due to bridge operation and disease problem often result in embedding box beam
Occur damaging after interior sensor long-time use or failure conditions, it can not deformation in monitor bridge span.Exactly
The deficiencies of being designed due to continuous rigid frame bridge monitoring technology and structure is to cause continuous rigid frame bridge middle span deflexion cracking disease that can not obtain
To the key factor effectively solved.
Summary of the invention
The utility model improves the above problem, i.e., the technical problems to be solved in the utility model is at present to even
The health monitoring of continuous rigid frame bridge generally by sensor embedding in bridge structure, is grown the bridge structure deformation in operation
Phase real time on-line monitoring assesses the safety of bridge, however sensor can only according to the health status of Analysis on monitoring data bridge
The corresponding variate of box beam is collected, then the relative deformation value of box beam is obtained by strain calculation, box beam can not be directly measured and exist
Absolute deformation value under the loads such as temperature and automobile, also complexity due to bridge operation and disease problem often result in embedding case
Occur damaging after sensor long-time use in beam or failure conditions, it can not deformation in monitor bridge span.
The specific embodiment of the utility model is: a kind of scaled model of monitoring continuous rigid frame bridge temperature and mobile load deformation
Experimental rig, which is characterized in that including reduced scale box beam and be used to support reduced scale box beam be fixedly connected on it is thin below reduced scale box beam
Wall bridge pier, the upper surface of the reduced scale box beam are placed with clump weight, and the side of the reduced scale box beam is provided with opening, the reduced scale
Box beam is open side setting towards the changes in temperature air blower for the setting that is open, and the reduced scale box beam span centre has reaction frame, the reduced scale
The having to be provided with towards reduced scale box beam away from one end of changes in temperature air blower and reduced scale box beam span centre lower part of box beam is respectively used to survey
The box beam amesdial of measuring tank beam end horizontal distortion and span centre vertical deformation, thin-wall piers upper end side have for measuring
The bridge pier amesdial of thin-wall piers top horizontal deformation.
Further, the reaction frame includes a pair of supporting for being erected at reduced scale box beam two sides, a pair of supporting it is upper
Portion is fixedly connected with crossbeam, the drive that jack is provided in the middle part of the crossbeam and jack is driven to exert a force to reduced scale box beam upper surface
Dynamic device.
Further, the jack is placed in the span centre position of the reduced scale box beam, and the driving device is hydraulic
The telescopic end of cylinder, the hydraulic cylinder is fixedly connected with jack.
Further, clump weight is placed in the axis line position of the reduced scale box beam, the jack and the counterweight
Block is in same axial location.
Compared with prior art, the utility model has the following beneficial effects: the utility model pours reality in laboratory
The scaled model of continuous rigid frame bridge, general scaling factor are that 0.05(reduced scale bridge length/realistic bridges are long), it is easy to operate, it is easy for construction, it can
Using the effective simulated driving mobile load of laboratory loading device to the repeated action of bridge structure and by being passed through changes in temperature into box beam
Gas effectively realizes the simulation of gradient of temperature, can flexibly and easily lay amesdial device, timely and accurately monitors the change of bridge
Shape situation；2. case of the reduced scale rigid frame bridge respectively under the independent operating condition such as self weight, mobile load, temperature difference or composite condition can be monitored effectively
The sensitive load of box beam mid-span deflection variation is effectively assessed in the variation of beam mid-span deflection, and monitoring data can also be effectively anti-
The deformation for reflecting practical bridge structure, adopts an effective measure avoided in time, and monitoring data can be the conjunction of continuous rigid frame bridge
Reason design and safe driving provide safeguard；3. reduced scale bridge model can be repeated in laboratory fatigue loading (100,000 times with
On) until large deflection and cracking, and real-time monitoring bridge deformation situation occurred in span centre box beam, the generation of model rigid frame bridge can be obtained
Large deflection fatigue load suffered when cracking can reflect tired vehicle suffered when middle span deflexion cracking occurs for practical continuous rigid frame bridge
Load solves the disadvantages of other monitoring methods period is long, and complexity is high, monitoring instrument difficult arrangement, while indoor model
Test can observe box beam basal crack development condition at any time, it is difficult solve the problems, such as practical Bridge Crack Monitoring, and can directly supervise
The absolute deformation value for surveying continuous rigid frame bridge solves the problems, such as that other monitoring means can not directly measure box beam deformation.
Detailed description of the invention
Fig. 1 is the structural facades figure of the utility model.
Fig. 2 is the texture edge figure of the utility model.
Fig. 3 is the structure top view of the utility model.
Fig. 4 is the schematic cross-section of box beam end and span centre.
Fig. 5 is the schematic cross-section at bridge pier.
Figure label explanation: 10- reduced scale box beam, 110- load backing plate, 120- sliding support, 20- thin-wall piers, 30- match
Pouring weight, 40- changes in temperature air blower, 50- reaction frame, 510- support frame, 520- crossbeam, 530- jack, 610- box beam amesdial,
620- bridge pier amesdial.
Specific embodiment
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
As shown in Fig. 1~5, a kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation, including
Reduced scale box beam 10 and the thin-wall piers 20 that reduced scale box beam 10 is fixedly connected below reduced scale box beam are used to support, the reduced scale box beam
10 upper surface is placed with clump weight 30, and the side of the reduced scale box beam is provided with opening, and reduced scale box beam opening side is set
The changes in temperature air blower 40 towards opening setting is set, the reduced scale box beam span centre has reaction frame 50, and the reduced scale box beam deviates from
One end and reduced scale box beam span centre lower part of changes in temperature air blower, which have to be provided with towards reduced scale box beam 10, is respectively used to measurement box beam
The box beam amesdial 610 of end horizontal deformation and span centre vertical deformation, thin-wall piers upper end side have thin for measuring
The bridge pier amesdial 620 of wall pier coping portion horizontal distortion.
In application, general scaling factor is 0.05(reduced scale by the scaled model for pouring practical continuous rigid frame bridge in laboratory
Bridge length/realistic bridges are long), thin-wall piers 20 are fixedly connected with reduced scale box beam 10, and clump weight 30 is for simulating diaphragm plate, railing and paving
The weight such as layer are filled, the clump weight 30 is placed in the reduced scale box beam axis line position and guarantees whole 10 stress of reduced scale box beam
Equilibrium, the both ends of reduced scale box beam 10 are hinged with sliding support 120 for simulating abutment.
With reference to Fig. 1, deformation caused by 10 gradient of temperature of reduced scale box beam is monitored, the other end closed at one end of reduced scale box beam 10 is had
There is opening, changes in temperature air blower 40 described in the utility model refers to blow out the air blower of low temperature or high temperature air, can be with
Cooled down using electric-heating-wire-heating or the air outlet for linking refrigeration equipment, is passed through cold air or heating by changes in temperature air blower 40
In reduced scale box beam 10, using the temperature difference inside and out thermometer or temperature-sensing probe measurement reduced scale box beam 10, reduced scale is monitored respectively
The end of the deformation of box beam 10 and thin-wall piers 20 under the different temperature difference, box beam amesdial 610 and bridge pier amesdial 620 connects respectively
Reduced scale box beam 10 and thin-wall piers are touched to realize induction and measurement to reduced scale box beam 10 and thin-wall piers deformation.Temperature can be obtained
10 middle span deflexion displacement of reduced scale box beam caused by degree is gone up and down and the horizontal distortion for causing 10 end of thin-wall piers 20 and reduced scale box beam,
Deformation at a temperature of more convenient simulation reduced scale rigid frame bridge, can reflect box beam of the practical rigid frame bridge under gradient of temperature across
Middle deformation.
The reduced scale box beam span centre has reaction frame 50, and reaction frame 50 includes a pair of the longitudinal direction for being erected at reduced scale box beam two sides
The support frame 510 of setting, the top of a pair of supporting are fixedly connected with crossbeam 520, are provided with jack 530 in the middle part of the crossbeam
And the driving device that driving jack exerts a force to reduced scale box beam upper surface, generally the driving device is hydraulic cylinder, described
The telescopic end of hydraulic cylinder is fixedly connected with jack, and the jack is placed in span centre position and the institute of the reduced scale box beam
The clump weight stated is in same axial location.
As shown in Fig. 2, using the jack 530 on reaction frame 50 to 10 repeated stock of reduced scale box beam, while monitoring reduced scale
Deformation of the box beam 10 under vehicular load repeatedly, it is general to be placed with load backing plate in the position that reduced scale box beam corresponds to jack
110, apply repeatedly tired lotus on the load backing plate 110 at 10 span centre axis of reduced scale box beam using the loading device in laboratory
It carrying, reverse cyclic loadings number monitors the deformation at the top of 10 span centre of reduced scale box beam and end and thin-wall piers up to 100,000 times or more at any time,
There is crack up to 10 root edge of reduced scale box beam in reverse cyclic loadings, can monitor 10 span centre of reduced scale box beam using bridge pier amesdial 620 at this time
Maximum defluxion and cause the maximum horizontal of reduced scale box beam 10 and thin-wall piers 20 to deform, and the maximum of reduced scale box beam 10 can be obtained
Fatigue cracking loads number, can relatively accurately reflect the stress of practical rigid frame bridge.
To sum up using the effective simulated driving mobile load of laboratory loading device to the repeated action of bridge structure and by case
It is passed through the simulation that air-conditioning effectively realizes gradient of temperature in beam, can flexibly and easily lay amesdial device, timely and accurately
Monitor the deformation of bridge；2. reduced scale rigid frame bridge can effectively be monitored respectively in the independent operating condition such as self weight, mobile load, temperature difference or group
The box beam mid-span deflection variation under operating condition is closed, the sensitive load of box beam mid-span deflection variation is effectively assessed, monitoring data
The deformation that can also effectively reflect practical bridge structure, adopts an effective measure avoided in time, and monitoring data can be company
The rational design and safe driving of continuous rigid frame bridge provide safeguard；Add 3. fatigue can be repeated in reduced scale bridge model in laboratory
There is large deflection and cracking, and real-time monitoring bridge deformation situation up to span centre box beam in load (100,000 times or more), and mould can be obtained
Fatigue load suffered when large deflection cracking occurs for type rigid frame bridge, when can reflect that middle span deflexion cracking occurs for practical continuous rigid frame bridge
Suffered tired vehicular load solves the disadvantages of other monitoring methods period is long, and complexity is high, monitoring instrument difficult arrangement,
Indoor model test can observe box beam basal crack development condition at any time simultaneously, solve asking for practical Bridge Crack Monitoring hardly possible
Topic, and the absolute deformation value of continuous rigid frame bridge can be directly monitored, box beam deformation can not directly be measured by solving other monitoring means
The problem of.
If the utility model is open or relates to the components or structural member of connection fastened to each other, except as otherwise sound
It is bright outer, it is fixedly connected it is to be understood that connection (such as using bolt or screw connection) can be removedly fixed, can also manage
Solution are as follows: it is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (
Such as manufactured using casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).
In addition, for indicating positional relationship or shape applied in above-mentioned any technical solution disclosed by the utility model
Term its meaning includes approximate with its, similar or close state or shape unless otherwise stated.
Either component provided by the utility model by multiple individual component parts either assembled, or
The separate part that integrally formed technique manufactures.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (4)
1. the scale (model) test device of a kind of monitoring continuous rigid frame bridge temperature and mobile load deformation, which is characterized in that including reduced scale
Box beam and the thin-wall piers that reduced scale box beam is fixedly connected below reduced scale box beam are used to support, the upper surface of the reduced scale box beam is put
It is equipped with clump weight, the side of the reduced scale box beam is provided with opening, and reduced scale box beam opening side setting is arranged towards opening
Changes in temperature air blower, the reduced scale box beam span centre have reaction frame, the reduced scale box beam away from changes in temperature air blower one end and
Reduced scale box beam span centre lower part have be provided with towards reduced scale box beam be respectively used to measurement box beam end horizontal deformation and span centre it is vertical
The box beam amesdial of deformation, thin-wall piers upper end side have the bridge pier thousand for measuring the deformation of thin-wall piers top horizontal
Divide table.
2. the scale (model) test device of a kind of monitoring continuous rigid frame bridge temperature and mobile load deformation according to claim 1,
It is characterized in that, the reaction frame includes a pair of supporting for being erected at reduced scale box beam two sides, the top of a pair of supporting is fixed
It is connected with crossbeam, jack and the driving for driving jack to exert a force to reduced scale box beam upper surface dress are provided in the middle part of the crossbeam
It sets.
3. the scale (model) test device of a kind of monitoring continuous rigid frame bridge temperature and mobile load deformation according to claim 2,
It is characterized in that, the jack is placed in the span centre position of the reduced scale box beam, the driving device is hydraulic cylinder, institute
The telescopic end for stating hydraulic cylinder is fixedly connected with jack.
4. the scale (model) test device of a kind of monitoring continuous rigid frame bridge temperature and mobile load deformation according to claim 3,
It is characterized in that, clump weight is placed in the axis line position of the reduced scale box beam, the jack is in the clump weight
Same axial location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821114730.4U CN208938508U (en) | 2018-07-14 | 2018-07-14 | A kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821114730.4U CN208938508U (en) | 2018-07-14 | 2018-07-14 | A kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation |
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| CN208938508U true CN208938508U (en) | 2019-06-04 |
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| CN201821114730.4U Expired - Fee Related CN208938508U (en) | 2018-07-14 | 2018-07-14 | A kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036091A (en) * | 2018-07-14 | 2018-12-18 | 福州大学 | A kind of scale (model) test devices and methods therefor of monitoring continuous rigid frame bridge temperature and mobile load deformation |
| CN114045739A (en) * | 2021-12-21 | 2022-02-15 | 石家庄铁道大学 | Verification assembly, system and method for reinforcing heavy haul railway bridge through simply supported continuous system |
-
2018
- 2018-07-14 CN CN201821114730.4U patent/CN208938508U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036091A (en) * | 2018-07-14 | 2018-12-18 | 福州大学 | A kind of scale (model) test devices and methods therefor of monitoring continuous rigid frame bridge temperature and mobile load deformation |
| CN114045739A (en) * | 2021-12-21 | 2022-02-15 | 石家庄铁道大学 | Verification assembly, system and method for reinforcing heavy haul railway bridge through simply supported continuous system |
| CN114045739B (en) * | 2021-12-21 | 2024-02-09 | 石家庄铁道大学 | Design method for reinforcing heavy-load railway bridge by simply supported-to-continuous system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190604 Termination date: 20210714 |