CN108169002A - A kind of reduced scale test model and method for testing steel-concrete composite beam Creep Characteristics - Google Patents
A kind of reduced scale test model and method for testing steel-concrete composite beam Creep Characteristics Download PDFInfo
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- CN108169002A CN108169002A CN201711399866.4A CN201711399866A CN108169002A CN 108169002 A CN108169002 A CN 108169002A CN 201711399866 A CN201711399866 A CN 201711399866A CN 108169002 A CN108169002 A CN 108169002A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0605—Mechanical indicating, recording or sensing means
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of structure testing methods of field of civil engineering.For steel-concrete combination beam full size long duration load test operation difficult problem, a kind of scaled model is invented, the model component is simple, small, the small spatial position such as can be placed under desk；Instrument is using vibrating string extensometer and thousand points of meters with position contrast test, it is ensured that the accuracy of result；Data collection uses Portable data acquisition instrument, can carry out energization acquisition for a long time, also can manually acquire；Result of the test can be compared with written calculation result.The data that experiment is collected can accurately describe mechanical characteristic of the steel-concrete structure under action of long-term load, disclose the long-term Laws of Mechanics of combination beam.
Description
Technical field
Patent of the present invention belongs to civil engineering structure experimental technique field, is related to a kind of test steel-concrete composite beam Xu
Become the reduced scale test model and method of characteristic.
Background technology
Steel-concrete composite beam has significant technical economic benefit and is widely applied prospect.The structure is in validity period
Between, the concrete in combination beam, which can generate, creeps, and girder steel will lead to the constraint of the deformation section occurs inside static determinacy combination beam
Stresses re-distribution can also cause indeterminate combination beam (contraction) second inner force of creeping changed over time, so as to cause combination
The change of beam section final stress state, for value up to as many as several times of flexible deformation, this requires stringent structure non-amount of deflection
Chang Buli.
However the influence crept to steel-concrete composite beam performance is sufficiently complex, contains a considerable amount of uncertainties,
The result inherently stochastic variable that nearly all factor for influencing to creep is generated together with them in order to obtain these parameters, is led to
It often needs to carry out full scale test.Belong to long-term mechanical property due to creeping, it is time-consuming very long, generally to continue 1 year or more, by environment
Disturbance and lab space are affected, while the experiment needs long-term measured data, and traditional foil gauge reading needs logical exchange
Electricity, and what is observed is short-term data, and stable, long-term, the accurate purpose for obtaining test specimen valid data, therefore combination beam is not achieved
The experiment of full size long duration load to implement be highly difficult.
Invention content
For steel-concrete composite beam full size long duration load test operation difficult problem, a kind of scaled model is invented, the mould
Type component is simple, small, the small spatial position such as can be placed under desk；Instrument is same using vibrating string extensometer and thousand points of meters
Position contrast test, it is ensured that the accuracy of result；Data collection uses Portable data acquisition instrument, can carry out energization acquisition for a long time,
Also it can manually acquire；Result of the test can be compared with written calculation result.
Description of the drawings
Fig. 1 is scaled model y direction schematic diagram；
Fig. 2 is scaled model lateral cross-sectional dimension schematic diagram；
Fig. 3 is scaled model perspective view.
In figure respectively marked as：1 is steel-concrete composite beam；2 be standard steel loading blocks；3 be standard steel cushion block；4 be percentage
Table；5 be vibrating string extensometer；6 be band gauge length amesdial；7 be Portable data acquisition instrument；8 triangular support bases；9 half rocker bearings；
10 Ribbed Bars；11 steel plates.
Specific embodiment
The content of patent of the present invention is realized by following technical solution.
1）8 He of bearing is set up at the relatively small indoor spaces of artificial disturbance, about 4 square metres of operating space floor space
Bearing 9, makes steel-concrete component 1, and the size of component 1 can be by actual size scaled down, steel plate-reinforcing bar pattern
Convenient for manual calculation result and comparison of test results analysis；One piece of cushion block 3 is respectively put on bearing 8 and 9；Component 1, which conserves to be placed into for 7 days, to be added
On the bearing of cushion block 3.
2）The same day of bearing is placed into component（That is the 7th day of component conservation）, by a vibrating string extensometer 5 and one
Band gauge length amesdial 6 is separately mounted to component top edge, lower edge steel plate 11 and concrete lower edges；5 and 6 mounted on same
Position carries out data comparison.A dial gauge is installed respectively at component span centre and bearing 8,9.
3）In the same day of instrument installation（That is the 7th day of component conservation）, standard steel loading blocks 2 are placed on to the trisection of component
At point, while connect sinusoid strain gauge 5 with Portable data acquisition instrument 7 and measure within first day, the time point subsequently measured
For：Measurement daily in 1st month is primary, measures within every 3 days the 2nd, the 3rd month once, measures within every 7 days the 4th to 12nd month once, when
Between span be 1 year.It can be measured after 1 year every 10 days primary.
4) data at each measuring point can use the result of vibrating string extensometer 5 and the result measured with gauge length amesdial
It is compared；Result of the test can be compared with the result of hand computation simultaneously.
Claims (2)
1. a kind of experimental rig and test method for measuring composite structure Creep Characteristics, it is characterised in that：Component is simple, volume
It is small, it the small spatial position such as can be placed under desk；Instrument is using vibrating string extensometer and thousand points of meters with position contrast test, it is ensured that
As a result accuracy；Data collection uses Portable data acquisition instrument, can carry out energization acquisition for a long time, also can manually acquire；Examination
Testing result can be compared with written calculation result；The data that experiment is collected can accurately describe steel-concrete structure long-term
Mechanical characteristic under load action discloses the long-term Laws of Mechanics of combination beam.
2. experimental rig as described in claim 1 and test method include component making, instrument Installation And Test scheme, specifically
Step includes：
1）Bearing 8 and bearing are set up at the relatively small indoor spaces of artificial disturbance, about 4 square metres of operating space floor space
9, steel-concrete component 1 is made, the size of component 1 can be easy for by actual size scaled down, steel plate-reinforcing bar pattern
Manual calculation result and comparison of test results are analyzed；One piece of cushion block 3 is respectively put on bearing 8 and 9；Component 1 conserves 7 days and is placed into cushioning block
On 3 bearing；
2）The same day of bearing is placed into component（That is the 7th day of component conservation）, by a vibrating string extensometer 5 and a band mark
Component top edge, lower edge steel plate 11 and concrete lower edges are separately mounted to away from amesdial 6；5 and 6 are mounted on same position
It puts, carries out data comparison.A dial gauge is installed respectively at component span centre and bearing 8,9；
3）In the same day of instrument installation（That is the 7th day of component conservation）, standard steel loading blocks 2 are placed on to the trisection point of component
Place, while connect sinusoid strain gauge 5 with Portable data acquisition instrument 7 and carry out measurement in first day, the time point subsequently measured be：
It measures once within 1st month, is measured within every 3 days the 2nd, the 3rd month once daily, measure within every 7 days the 4th to 12nd month primary, the time
Span is 1 year.It can be measured after 1 year every 10 days primary；
4) data at each measuring point can be carried out with the result of vibrating string extensometer 5 with the result measured with gauge length amesdial
Comparison；Result of the test can be compared with the result of hand computation simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399866.4A CN108169002A (en) | 2017-12-22 | 2017-12-22 | A kind of reduced scale test model and method for testing steel-concrete composite beam Creep Characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399866.4A CN108169002A (en) | 2017-12-22 | 2017-12-22 | A kind of reduced scale test model and method for testing steel-concrete composite beam Creep Characteristics |
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| Publication Number | Publication Date |
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| CN108169002A true CN108169002A (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711399866.4A Pending CN108169002A (en) | 2017-12-22 | 2017-12-22 | A kind of reduced scale test model and method for testing steel-concrete composite beam Creep Characteristics |
Country Status (1)
| Country | Link |
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| CN (1) | CN108169002A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060541A (en) * | 2018-06-22 | 2018-12-21 | 中国十七冶集团有限公司 | A kind of steel-concrete combination beam detection device and its application method |
| CN109738178A (en) * | 2019-03-11 | 2019-05-10 | 南京工业大学 | Wood-concrete combination beam shear connector push out test device and method under fire |
| CN111879231A (en) * | 2020-07-21 | 2020-11-03 | 三峡大学 | High-output-sensitivity concrete surface strain sensor and manufacturing and measuring method thereof |
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| US20100092247A1 (en) * | 2004-07-23 | 2010-04-15 | Smart Structures, Inc. | Monitoring system for concrete pilings and method of installation |
| CN101464234A (en) * | 2008-12-31 | 2009-06-24 | 上海市隧道工程轨道交通设计研究院 | Duct test piece production method used for duct piece connector test |
| CN102053027A (en) * | 2010-10-27 | 2011-05-11 | 中铁十局集团有限公司 | Method for manufacturing model beam for simulating and analyzing shrinkage creep of high-speed railway precast box beam |
| CN104392148A (en) * | 2014-12-15 | 2015-03-04 | 重庆交通大学 | Method for setting pre-camber of special cable-stayed bridge for long-span rail |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060541A (en) * | 2018-06-22 | 2018-12-21 | 中国十七冶集团有限公司 | A kind of steel-concrete combination beam detection device and its application method |
| CN109060541B (en) * | 2018-06-22 | 2020-10-23 | 中国十七冶集团有限公司 | Steel concrete composite beam detection device and application method thereof |
| CN109738178A (en) * | 2019-03-11 | 2019-05-10 | 南京工业大学 | Wood-concrete combination beam shear connector push out test device and method under fire |
| CN111879231A (en) * | 2020-07-21 | 2020-11-03 | 三峡大学 | High-output-sensitivity concrete surface strain sensor and manufacturing and measuring method thereof |
| CN111879231B (en) * | 2020-07-21 | 2022-02-01 | 三峡大学 | High-output-sensitivity concrete surface strain sensor and manufacturing and measuring method thereof |
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Application publication date: 20180615 |