CN109341990A - The experiment loading device and its loading method of steel box girder under distortion load - Google Patents
The experiment loading device and its loading method of steel box girder under distortion load Download PDFInfo
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- CN109341990A CN109341990A CN201811260111.0A CN201811260111A CN109341990A CN 109341990 A CN109341990 A CN 109341990A CN 201811260111 A CN201811260111 A CN 201811260111A CN 109341990 A CN109341990 A CN 109341990A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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Abstract
The present invention provides the experiment loading devices and its loading method of steel box girder under distortion load.The experiment loading device includes: hydraulic-servo-load group, power decomposition component, buckstay, load plate, experiment steel box-girder, jack, bracket, support etc..Hydraulic-servo-load group is horizontal positioned, and two sides load simultaneously parallel.Buckstay is between hydraulic-servo-load group and power decomposition component.In loading procedure, the center of distortion of experiment steel box-girder need to be passed through with joint efforts.Power decomposition component includes: Orthogonal Decomposition plate, roller bearing and roller etc., can be the tangential component along each plate member of box beam by horizontal loading forces Orthogonal Decomposition.Load plate bears the vertical extruding force of roller, passes through fillet weld transmitting distortion load component between experiment steel box-girder.The design of this loading scheme effectively eliminates bending and torsional load component in eccentric load, directly obtains box section distortion deformation and the components of stress.
Description
Technical field
The invention belongs to Steel Structural Design field, in particular to the experiment of steel box girder loads dress under a kind of distortion load
It sets.
Background technique
As industrialization of the country process is constantly accelerated, steel box girder is widely used in the people's livelihood such as bridge, highway basis and sets
Apply construction.Under eccentric load effect, box beam is except bending, in addition to torsional deflection, because of variable geometry, beam section there is also
Transverse deflections, i.e. distortion deformation.Existing document shows: the box beam for being 30m for span, when wall thickness and deck-molding ratio are 0.1
When, by distorting and reversing the lonitudinal warping stress of generation up to the 23~27% of bending normal stresses, and the lateral delfection stress that distorts
It is reachable horizontal with the same order of magnitude of bending normal stresses, it is therefore necessary to give certain attention to box section distortion effect.
In Practical Project, counted frequently with an amplification conversion factor and eccentric load in deform and answer caused by allocation of distortion
Power.This conversion factor experience design method owned by France, calculating error is larger, and non-system considers external applied load, constraint and box beam internal structure
Etc. factors distortion load component caused by influence.
Therefore, the art can directly extract steel box-girder cross section distortion under eccentric load there is an urgent need to one kind and deform and answer
The experimental method of power.
Summary of the invention
It is an object of that present invention to provide it is a kind of distortion load under steel box girder experiment loading device and its loading method,
To directly be accurately obtained the deformation of steel box-girder cross section distortion and stress under eccentric load, to overcome Reduced Coefficient Method in Practical Project
Deficiency in.
On the one hand, the present invention provides a kind of experiment loading device of steel box girder under distortion load, feature exists
In: including hydraulic-servo-load group, power decomposition component, buckstay, load plate, experiment steel box-girder, jack, bracket, support etc..
The hydraulic-servo-load group is horizontal positioned, and two sides load simultaneously parallel.
The buckstay is between the hydraulic-servo-load group and the power decomposition component.In loading procedure, resultant force is needed
Pass through the center of distortion of the experiment steel box-girder.
The power decomposition component includes: Orthogonal Decomposition plate, roller bearing and roller etc., can be by horizontal loading forces Orthogonal Decomposition
Along the tangential component of each plate member of box beam.
The load plate bears the vertical extruding force of the roller, passes through fillet weld transmitting distortion between the experiment steel box-girder
Load component.
On the other hand, the present invention also provides a kind of experiment loading method of steel box girder under distortion load, packets
Include following step:
(1) the experiment loading device of steel box girder under the described in any item distortion loads of claim 1-5 is prepared, wherein
Hydraulic-servo-load group (110) is horizontal positioned；
(2) it is loaded simultaneously parallel in the two sides of the hydraulic-servo-load group (110), comprising:
During loading, pass through the center of distortion of experiment steel box-girder (150) with joint efforts；
By adjusting jack (160), so that hydraulic-servo-load group (110), power decomposition component (120), buckstay
(130) and the kernel of section of experiment steel box-girder (150) is in sustained height, to avoid the torsional deflection generated by height difference；
Four pieces of load plates (140) are centrosymmetric, and two sides roller (253) should be with four pieces of load plates (140) simultaneously when load
Contact, to improve experiment measurement accuracy, reduce error；
So that load plate (140) is born roller (253) vertical extruding force, passes through fillet welding between the experiment steel box-girder (150)
Stitch (341) transmitting distortion load component；
In loading procedure, the center of distortion amount of side-shift of real-time monitoring experiment steel box-girder (150) is answered, to effectively control two sides
The fltting speed and loading force of hydraulic-servo-load group (110).
Above-mentioned loading method, may also include that
By increasing plate thickness or partition quantity, have buckstay (130), power decomposition component (120) and load plate (140) etc.
Standby greater stiffness.
The beneficial effect comprise that
(1) by using above-mentioned experiment loading scheme, the distortion load bearing part in eccentric load can be effectively extracted, directly
To box section distortion deformation and the components of stress.
(2) by using above-mentioned experiment loading scheme, the box section distorting stress components of strain and box beam can accurately be predicted
Highly, the relationship of the parameters such as plate member thickness, block board thickness and position, to be provided reliably for box beam size design in Practical Project
Data.
(3) by using above-mentioned experiment loading scheme, it can accurately measure the distortional buckling critical force of box beam danger plate member, from
And the rational deployment for partition and longitudinal stiffener provides reference.
Detailed description of the invention
Figure 1A is that the experiment loading device of steel box girder under the distortion load according to one embodiment of the present invention is vertical
Body figure.
Figure 1B is that the experiment loading device of steel box girder under the distortion load according to one embodiment of the present invention is flat
Face figure.
Fig. 2 power decomposition component Local map.
Fillet weld schematic diagram between Fig. 3 load plate and experiment box beam.
In figure, 110-- hydraulic-servo-load group, 120-- power decomposition component, 130-- buckstay, 140-- load plate,
150-- experiment steel box-girder, 160-- jack, 170-- bracket, 180-- support, 251-- Orthogonal Decomposition plate, 252-- roller bearing,
253-- roller, 341-- fillet weld.
Specific embodiment
Unless otherwise defined, technical term used in the present embodiment is identical as meaning known to those skilled in the art.
Below with reference to embodiment and attached drawing, the technical solutions of the present invention will be further described.
According to a kind of embodiment, Fig. 1 and Fig. 2 is the experiment loading scheme of steel box girder under distorting load, comprising: liquid
Press servo loading group 110, power decomposition component 120, buckstay 130, load plate 140, experiment steel box-girder 150, jack 160, branch
Frame 170, support 180 etc..The hydraulic-servo-load group 110 is horizontal positioned, and two sides load simultaneously parallel.The buckstay 130
Between the hydraulic-servo-load group 110 and the power decomposition component 120.In loading procedure, the experiment need to be passed through with joint efforts
The center of distortion of steel box-girder 150.The power decomposition component 120 includes: Orthogonal Decomposition plate 251, roller bearing 252 and roller 253 etc.,
It can be the tangential component along each plate member of box beam by horizontal loading forces Orthogonal Decomposition.The load plate 140 bears the roller 253 and hangs down
Straight extruding force passes through 150 transmitting distortion load components of fillet weld 341 of the experiment steel box-girder.
Preferably, the load plate 140 is four pieces, and four pieces of load plates 140 are centrosymmetric, two sides when load
Roller answers 253 to contact simultaneously with four pieces of load plates 140, to improve experiment measurement accuracy, reduce error.
In loading procedure, by adjusting jack 160, so that hydraulic-servo-load group 110, power decomposition component 120, rigidity
Beam 130 and experiment 150 cross-section center of steel box-girder should be at sustained height, to avoid the torsional deflection generated by height difference.
For the measurement error for reducing the experiment distortion deformation of steel box-girder 150, can be made just by increasing plate thickness or partition quantity etc.
Property beam 130, power decomposition component 120 and load plate 140 etc. have greater stiffness.
For the loaded in parallel for guaranteeing hydraulic-servo-load group 110, loading velocity should not be too fast.Meanwhile answering real-time monitoring tubular
The oil pressure and oil temperature of road internal hydraulic pressure oil guarantee safety.
The above is only embodiments of the present invention or embodiment, is not intended to limit the invention in any way, all bases
The technology of the present invention essence becomes any reasonable modification, change and equivalent structure made by embodiment of above or embodiment
It changes, is still within the scope of the technical scheme of the invention.
Claims (8)
1. the experiment loading device of steel box girder under a kind of distortion load characterized by comprising hydraulic-servo-load group
(110), power decomposition component (120), buckstay (130), load plate (140), experiment steel box-girder (150), jack (160), branch
Frame (170), support (180)；Wherein, the hydraulic-servo-load group (110) is horizontal positioned, and two sides load simultaneously parallel；It is described
Buckstay (130) is between the hydraulic-servo-load group (110) and the power decomposition component (120), in loading procedure, closes
Power need to pass through the center of distortion of experiment steel box-girder (150).
2. loading device according to claim 1, wherein having four pieces of load plates (140).
3. loading device according to claim 1, the power decomposition component (120) includes: Orthogonal Decomposition plate (251), rolling
Horizontal loading forces Orthogonal Decomposition can be the tangential component along each plate member of box beam by axis (252) and roller (253).
4. loading device according to claim 1, the load plate (140) bears the vertical extruding force of the roller (253),
Pass through fillet weld (341) transmitting distortion load component between the experiment steel box-girder (150).
5. loading device according to claim 1, four pieces of load plates (140) are centrosymmetric, two sides institute when load
It states roller to answer (253) and four pieces of load plates (140) while contacting, to improve experiment measurement accuracy, reduce error.
6. loading device according to claim 1, in loading procedure, by adjusting the jack (160), so that described
Hydraulic-servo-load group (110), the power decomposition component (120), the buckstay (130) and the experiment steel box-girder (150)
Cross-section center should be at sustained height, to avoid the torsional deflection generated by height difference.
7. the experiment loading method of steel box girder under a kind of distortion load comprising following step:
(1) the experiment loading device for preparing steel box girder under distortion load described in any one of claims 1-6, wherein hydraulic
Servo loading group (110) is horizontal positioned；
(2) it is loaded simultaneously parallel in the two sides of the hydraulic-servo-load group (110), comprising:
During loading, pass through the center of distortion of experiment steel box-girder (150) with joint efforts；
By adjusting jack (160) so that hydraulic-servo-load group (110), power decomposition component (120), buckstay (130) and
The kernel of section of experiment steel box-girder (150) is in sustained height, to avoid the torsional deflection generated by height difference；
Four pieces of load plates (140) are centrosymmetric, and two sides roller is answered (253) and four pieces of load plates (140) while being contacted when load,
To improve experiment measurement accuracy, reduce error；
So that load plate (140) is born roller (253) vertical extruding force, passes through fillet weld between the experiment steel box-girder (150)
(341) transmitting distortion load component；
During loading, the center of distortion amount of side-shift of real-time monitoring experiment steel box-girder (150), so that effectively control two sides are hydraulic
The fltting speed and loading force of servo loading group (110).
8. loading method according to claim 7, further include:
By increasing plate thickness or partition quantity, have buckstay (130), power decomposition component (120) and load plate (140) larger
Rigidity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811260111.0A CN109341990A (en) | 2018-10-26 | 2018-10-26 | The experiment loading device and its loading method of steel box girder under distortion load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811260111.0A CN109341990A (en) | 2018-10-26 | 2018-10-26 | The experiment loading device and its loading method of steel box girder under distortion load |
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| CN109341990A true CN109341990A (en) | 2019-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116029041A (en) * | 2023-03-29 | 2023-04-28 | 民航机场规划设计研究总院有限公司 | Method for calculating transverse distribution of load of large-width-span-ratio aircraft load bridge |
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|---|---|---|---|---|
| CN102677708A (en) * | 2012-03-05 | 2012-09-19 | 王振东 | Method for applying prestress by reaction beam for static load test of pile foundation and steel box girder |
| JP2015094758A (en) * | 2013-11-14 | 2015-05-18 | 株式会社神戸製鋼所 | Residual stress calculation method |
| US20170102229A1 (en) * | 2015-04-15 | 2017-04-13 | General Electric Company | Data Acquisition Devices, Systems and Method for Analyzing Strain Sensors and Monitoring Turbine Component Strain |
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2018
- 2018-10-26 CN CN201811260111.0A patent/CN109341990A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677708A (en) * | 2012-03-05 | 2012-09-19 | 王振东 | Method for applying prestress by reaction beam for static load test of pile foundation and steel box girder |
| JP2015094758A (en) * | 2013-11-14 | 2015-05-18 | 株式会社神戸製鋼所 | Residual stress calculation method |
| US20170102229A1 (en) * | 2015-04-15 | 2017-04-13 | General Electric Company | Data Acquisition Devices, Systems and Method for Analyzing Strain Sensors and Monitoring Turbine Component Strain |
Non-Patent Citations (1)
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| 任扬志: "考虑变间距隔板的起重机偏轨箱梁畸变特性研究", 《中国博士学位论文全文数据库》 * |
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| CN116029041A (en) * | 2023-03-29 | 2023-04-28 | 民航机场规划设计研究总院有限公司 | Method for calculating transverse distribution of load of large-width-span-ratio aircraft load bridge |
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Application publication date: 20190215 |