CN110220626A - A kind of I-shaped steel-concrete composite beam support reaction detection method - Google Patents
A kind of I-shaped steel-concrete composite beam support reaction detection method Download PDFInfo
- Publication number
- CN110220626A CN110220626A CN201910425227.3A CN201910425227A CN110220626A CN 110220626 A CN110220626 A CN 110220626A CN 201910425227 A CN201910425227 A CN 201910425227A CN 110220626 A CN110220626 A CN 110220626A
- Authority
- CN
- China
- Prior art keywords
- steel
- jack
- girder
- support reaction
- shaped steel
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Abstract
Present invention relates particularly to a kind of I-shaped steel-concrete composite beam support reaction detection methods, the combination beam is made of steel girder, concrete slab, WELDING STUDS, wherein steel girder by the I-shaped girder of twice, span centre needle beam, fulcrum cross bearer, choose arm crossbeam and form, steel girder is connected by WELDING STUDS with concrete slab, and composite structure is formed.A hydraulic jack and displacement meter is respectively set in each position of the fulcrum of I-shaped steel-concrete composite beam in support reaction detection method of the present invention.Jack synchronization of jacking up certain altitude, it is ensured that all supports of integrin steel girder all come to nothing, and measure each jack support reaction in stationary state.This method realizes the precise measurement of I-shaped steel-concrete composite beam support reaction by relatively simple technological means by means of the instrument and equipment of the routine such as jack, displacement meter, provides technology for the correction of subsequent support reaction and the adjustment of secondary stress and guarantees.
Description
Technical field
The invention belongs to technical field of bridge engineering, and in particular to a kind of I-shaped steel-concrete composite beam support reaction inspection
Survey method.
Background technique
" combination beam " concept that reinforced concrete bridge deck plate and girder steel are cooperatively formed by shear connector is originating from 20
The Germany of the thirties in century, and be widely used in the climax of America and Europe's transport development sixties.To in the 1990s,
Beam type combined bridge is promoted rapidly in European Countries and Japan, it has also become the mainstream bridge type of large span beam bridge.
In the 21st century, China is in the side such as composite bridge design theory, shear key structure form and construction technology
There are many innovations and development in face again, so that composite bridge is widely used.Composite bridge principal mode has:
Combined steel plate beam, compound section steel box girder, combination steel truss girder, Corrugated webs combination beam etc..I-shaped steel-concrete composite beam is common
Combined steel plate beam bridge, it is made of steel girder, concrete slab, WELDING STUDS, wherein steel girder by the I-shaped girder of two panels,
Span centre needle beam, fulcrum cross bearer choose arm crossbeam composition, and steel girder is connected by WELDING STUDS with concrete slab, shape
At composite structure.
Combination beam construction is made of steel girder factory indoor, and the full weldering mode in scene connects；Floorings are pre- using factory
System, the wet joint concrete of cast in situs or the live total cross-section cast-in-place concrete bridge floor of use.Since steel girder all uses work
Font opening section has many advantages, such as that advanced simple structure, technical-economic index, construction and operation maintenance are convenient.
The combination beam is opening section, and during Steel Structure Installation, due to not yet forming composite structure with concrete, structure is rigid
Degree is smaller, along with construction period manufacture and installation accuracy error, falsework sedimentation etc. influence, is easy to cause girder steel support reaction
Distribution is uneven, so that structure is generated secondary stress, and then influence structural stress state.Thus it is necessary to be detected to support reaction, and
Support reaction correction is carried out using effective means, improves structure stress, enhances the cracking resistance of concrete slab, improves structure
Service life.And it adjusts on condition that needing to carry out precise measurement to support reaction.
Traditional support reaction detection method is to carry out local jacking in some support position by jack, to seat empty
One pressure sensor is set between support and kingpost baseplate afterwards, using the pressure of the sensor measured as the anti-of the support
Power.Then the test for completely joining each end reaction entirely is circuited sequentially.Since this method is not disposable synchro measure, single support
Jacking will receive the influence of steel girder frame overall stiffness, lead to the actual weight of the sum of support reaction measured and integrin bridge
Deviation.
Summary of the invention
In view of the above-mentioned problems, the invention proposes a kind of I-shaped steel-concrete composite beam support reaction detection method, it can
Realize the precise measurement of I-shaped steel-concrete composite beam support reaction.
To achieve the goals above, technical scheme is as follows: a kind of I-shaped steel-concrete composite beam support reaction
Detection method, the I-shaped steel-concrete composite beam include the twice I-steel girder along bridge to setting, are located at the work
Concrete slab above shaped steel girder, it is big that the position of the fulcrum between the stringer of the twice I-shaped cross-section is provided with fulcrum
Crossbeam, if the span centre position between the stringer of the twice I-shaped cross-section is provided with arterial highway span centre needle beam, I-shaped section of twice
The two sides of face stringer, which are respectively arranged with, chooses arm crossbeam, and the I-shaped steel-concrete composite beam bottom position of the fulcrum is provided with bridge
Pier capping beam, pier cap beam two sides position corresponding with i shaped steel girder are provided with support, the I-steel main girder frame
On the support at the top of pier cap beam, it is characterised in that detection method includes the following steps for the support reaction:
A, jack and displacement meter, the jack is respectively set in each fulcrum of the I-shaped steel-concrete composite beam
And displacement meter is arranged between fulcrum cross bearer and pier cap beam；
B, the jack synchronization of jacking up sustained height of each fulcrum, I-shaped steel-concrete composite beam is integrally jacked up, institute
State displacement meter for measure jack jacking distance, to ensure that top lifting height is consistent, at the same ensure I-steel girder with it is each
Support at the top of the pier cap beam of fulcrum all comes to nothing；
C, after jacking in place, the reality in each jack support reaction of the disposable synchro measure of stationary state, as each support of girder steel
Survey counter-force；
D, jack is fallen after rise, I-steel girder and support weld；
E, jack is removed, the detection of girder steel support reaction is completed.
Further, fulcrum cross bearer side is provided with crossbeam and puts more energy into, and each fulcrum cross bearer is put more energy into crossbeam
2 digital jack and 2 displacement meters are respectively set in corresponding position.
Further, before monitoring, all jack, displacement meter are demarcated.
Further, jack synchronization of jacking up, jacking amount are controlled the 1/2800 ~ 1/3200 of girder across footpath.
Further, jack oil pressure meter accuracy grade is not less than 0.4 grade, and displacement meter accuracy class is not less than 0.01mm.
Detection device of the invention when in use, first makes each jack synchronization of jacking up sustained height, it is ensured that integrin girder steel
Each support all comes to nothing, must be anti-in each very heavy topmast of the disposable synchro measure of stationary state after jack jacking in place
Power, the actual measurement support reaction as I-shaped steel-concrete composite beam.
The invention has the advantages that passing through relatively simple technology by means of the instrument and equipment of the routine such as jack, displacement meter
Means realize the precise measurement of I-shaped steel-concrete composite beam support reaction, are the correction and secondary stress of subsequent support reaction
Offer technology is adjusted to guarantee.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 is I-shaped steel-concrete composite beam totality elevation；
Fig. 2 is I-shaped steel-concrete composite beam plan view；
Fig. 3 is that A-A section --- span centre is without crossbeam location criteria cross section in Fig. 1；
Fig. 4 is B-B section --- span centre needle beam location criteria cross section in Fig. 1；
Fig. 5 is C-C section --- fulcrum cross bearer position cross section in Fig. 1；
Fig. 6 is I-shaped steel-concrete composite beam support reaction detection device scheme of installation.
Specific embodiment
Feature of the invention and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, with
Convenient for the understanding of technical staff of the same trade:
Such as Fig. 1 ~ Fig. 5, label 1-12 is respectively as follows: 1 in figure --- I-shaped girder, 2 --- needle beam, 3 --- cross bearer,
4 --- crossbeam is put more energy into, 5 --- choose arm crossbeam, 6 --- concrete slab, 7 --- WELDING STUDS, 8 --- anticollision barrier, 9 ---
--- support, 11 --- the jack, 12 --- displacement meter of pier cap beam, 10.
Embodiment:
Fig. 1 ~ 5 are three stride continuous combination beam totality elevation, plan view, cross-sectional view, and the combination beam is by steel girder, concrete bridge
Panel 6, WELDING STUDS 7 form, wherein steel girder by the I-shaped girder 1 of twice, span centre needle beam 2, fulcrum cross bearer 3, choose arm cross
Beam 5 forms, and steel girder is connected by WELDING STUDS 7 with concrete slab 6, forms composite structure.
The steel girder of the combination beam is made of factory indoor, and the full weldering mode in scene connects.Since steel girder uses I-shaped
Shape opening section, during Steel Structure Installation, due to not yet forming composite structure with concrete, the rigidity of structure is smaller, along with applying
The Boundary Condition Effects such as installation accuracy error, bracket relative settlement between duration are easy to cause the distribution of girder steel support reaction uneven, make to tie
Structure generates secondary stress, and then influences structural stress state.Thus it is necessary to detect to support reaction, and use effective means
Support reaction correction is carried out, structure stress is improved.
Support reaction detection method is as follows:
1, after steel girder erection, the crossbeam of each fulcrum cross bearer shown in Fig. 5 is put more energy into position, and setting 2 is digital very heavy
Top and 2 displacement meters.Three-span continuous beam full-bridge amounts to 8 digital jack and 8 displacement meters.
2,8 jack synchronization of jacking up certain altitudes, it is ensured that 8 supports of integrin girder steel all come to nothing.
3, in 8 jack support reaction R of the disposable synchro measure of stationary state1~R8, actual measurement as each support of girder steel
Counter-force.
4, jack is fallen after rise, girder and support weld.
5, jack is removed, the detection of girder steel support reaction is completed.
Support reaction detection principle and points for attention:
1, the synchronization of jacking up of jack palpus, jacking amount are preferably controlled 1/2800 ~ 1/3200 or so of girder across footpath.
2, jack oil pressure meter accuracy grade is not less than 0.4 grade, and displacement meter accuracy class is not less than 0.01mm.
3, before monitoring, all jack, displacement meter must be demarcated.
The present invention passes through relatively simple technological means --- and jack and displacement meter realize I-shaped steel-concrete
The precise measurement of combination beam support reaction provides technology guarantee for the correction of subsequent support reaction.
Claims (5)
1. a kind of I-shaped steel-concrete composite beam support reaction detection method, the I-shaped steel-concrete composite beam includes suitable
Twice I-steel girder of the bridge to setting, concrete slab above the i shaped steel girder, the twice work
Position of the fulcrum between shaped sections stringer is provided with fulcrum cross bearer, the span centre position between the stringer of the twice I-shaped cross-section
It is equipped with arterial highway span centre needle beam if installing, the two sides of twice I-shaped cross-section stringer, which are respectively arranged with, chooses arm crossbeam, the I-shaped
Shape steel-concrete composite beam bottom position of the fulcrum is provided with pier cap beam, the pier cap beam two sides and i shaped steel girder pair
The position answered is provided with support, and the I-steel main beam supporting is on the support at the top of the pier cap beam, it is characterised in that described
Support reaction detection method includes the following steps:
A, jack and displacement meter are respectively set in each position of the fulcrum of the I-shaped steel-concrete composite beam, described thousand
Jin top and displacement meter are arranged between fulcrum cross bearer and pier cap beam；
B, the jack synchronization of jacking up sustained height of each fulcrum, I-shaped steel-concrete composite beam is integrally jacked up, institute
State displacement meter for measure jack jacking distance, to ensure that top lifting height is consistent, at the same ensure I-steel girder with it is each
Support at the top of the pier cap beam of fulcrum all comes to nothing；
C, after jacking in place, the reality in each jack support reaction of the disposable synchro measure of stationary state, as each support of girder steel
Survey counter-force；
D, jack is fallen after rise, I-steel girder and support weld；
E, jack is removed, the detection of girder steel support reaction is completed.
2. a kind of I-shaped steel-concrete composite beam support reaction detection method according to claim 1, it is characterised in that institute
It states fulcrum cross bearer side and is provided with crossbeam and put more energy into, each fulcrum cross bearer is being respectively set 2 with crossbeam corresponding position of putting more energy into
A digital jack and 2 displacement meters.
3. a kind of I-shaped steel-concrete composite beam support reaction detection method according to claim 1, it is characterised in that prison
Before survey, all jack, displacement meter are demarcated.
4. a kind of I-shaped steel-concrete composite beam support reaction detection method according to claim 1, it is characterised in that thousand
Jin top synchronization of jacking up, jacking amount are controlled the 1/2800 ~ 1/3200 of girder across footpath.
5. a kind of I-shaped steel-concrete composite beam support reaction detection method according to claim 1, it is characterised in that thousand
Jin top oil pressure gauge accuracy class is not less than 0.4 grade, and displacement meter accuracy class is not less than 0.01mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425227.3A CN110220626A (en) | 2019-05-21 | 2019-05-21 | A kind of I-shaped steel-concrete composite beam support reaction detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425227.3A CN110220626A (en) | 2019-05-21 | 2019-05-21 | A kind of I-shaped steel-concrete composite beam support reaction detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110220626A true CN110220626A (en) | 2019-09-10 |
Family
ID=67821635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910425227.3A Pending CN110220626A (en) | 2019-05-21 | 2019-05-21 | A kind of I-shaped steel-concrete composite beam support reaction detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110220626A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700113A (en) * | 2019-11-05 | 2020-01-17 | 中建交通建设集团有限公司 | Prestress applying device of non-prestressed beam bridge and construction method thereof |
| CN112095444A (en) * | 2020-09-16 | 2020-12-18 | 贵州路桥集团有限公司 | I-shaped steel-concrete composite beam secondary stress adjustment system |
| CN112729635A (en) * | 2021-02-20 | 2021-04-30 | 河北省建筑科学研究院有限公司 | Computer-based real-time monitoring method for stress state of steel-concrete composite beam |
| CN114354111A (en) * | 2022-01-06 | 2022-04-15 | 长安大学 | Vehicle-bridge coupling vibration test structure |
-
2019
- 2019-05-21 CN CN201910425227.3A patent/CN110220626A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700113A (en) * | 2019-11-05 | 2020-01-17 | 中建交通建设集团有限公司 | Prestress applying device of non-prestressed beam bridge and construction method thereof |
| CN112095444A (en) * | 2020-09-16 | 2020-12-18 | 贵州路桥集团有限公司 | I-shaped steel-concrete composite beam secondary stress adjustment system |
| CN112095444B (en) * | 2020-09-16 | 2022-04-15 | 贵州路桥集团有限公司 | I-shaped steel-concrete composite beam secondary stress adjustment system |
| CN112729635A (en) * | 2021-02-20 | 2021-04-30 | 河北省建筑科学研究院有限公司 | Computer-based real-time monitoring method for stress state of steel-concrete composite beam |
| CN112729635B (en) * | 2021-02-20 | 2022-04-15 | 河北省建筑科学研究院有限公司 | Computer-based support and monitoring method for monitoring stress state of steel-concrete composite beam in real time |
| CN114354111A (en) * | 2022-01-06 | 2022-04-15 | 长安大学 | Vehicle-bridge coupling vibration test structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110220626A (en) | A kind of I-shaped steel-concrete composite beam support reaction detection method | |
| CN108457188B (en) | A kind of walking incremental launching construction by multipoint jacking construction | |
| CN103266573B (en) | Steel Box Girder of Self-Anchored Suspension beam unidirectional single-point three slideway synchronous push construction method | |
| CN108589556B (en) | Across operation line low clearance swivel bridges construction | |
| CN105544412B (en) | Incremental launching construction method for three-main-truss rigid suspension cable stiffening continuous steel truss girder with stiffening chord | |
| CN102071814B (en) | High-rise long-span door type truss integral lifting device and construction method thereof | |
| CN106284079A (en) | A kind of bridge break post replace classification synchronize integral jacking construction method | |
| CN102808383B (en) | Curved bridge counter-slope jacking construction process | |
| CN104452597B (en) | Pier prestressed cap beam with extra length Construction Supporting System in water | |
| CN214271732U (en) | Bridge construction that stridees across railway line is with dilatory device | |
| CN105507168A (en) | Multi-span box girder integral ultrahigh alternate jacking construction system and method | |
| CN110205933A (en) | A kind of arch rib of long-span steel arch bridge assembly falsework | |
| CN113622316A (en) | Steel truss girder multipoint traction type pushing construction system and construction method thereof | |
| CN110700100A (en) | Bailey beam bundle construction method for cast-in-situ platform of high-pier small-radius curve ramp bridge | |
| CN112627055A (en) | Bridge bent cap formwork support adjusting device and bridge bent cap construction method | |
| CN109811665A (en) | The installation method of assembled heavy type steel corbel | |
| CN110144804A (en) | A kind of I-shaped steel-concrete composite beam secondary stress adjustment device and its method of adjustment | |
| CN216640288U (en) | Tower-passing sliding platform for steel box girder of cable-stayed bridge | |
| Zhang et al. | The world's first extradosed bridge with corrugated steel webs: Japan's Ohmi–Odori Bridge | |
| CN105423880B (en) | A kind of method for hanging main push-towing rope measurement deflection of bridge span | |
| CN113718627A (en) | Construction method for adjusting gravity center of open bridge body | |
| CN102704414A (en) | Construction method for jacking arched bridges | |
| CN108517779B (en) | Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder | |
| CN106869319A (en) | Large span steel truss installation method | |
| Liu et al. | Dongping channel bridge: long-span steel arch bridge in high-speed railway, China |
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 |