CN205607789U - Quadrature opposite sex decking U -shaped rib and panel splice fatigue test device - Google Patents
Quadrature opposite sex decking U -shaped rib and panel splice fatigue test device Download PDFInfo
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- CN205607789U CN205607789U CN201620279914.0U CN201620279914U CN205607789U CN 205607789 U CN205607789 U CN 205607789U CN 201620279914 U CN201620279914 U CN 201620279914U CN 205607789 U CN205607789 U CN 205607789U
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Abstract
The utility model relates to a quadrature opposite sex decking U -shaped rib and panel splice fatigue test device, including test piece, test piece restraint device, loading device, controlling means, data acquisition device and computer, the test piece is fixed on the test piece restraint device, loading device includes actuator and load sharing roof beam, controlling means connects perpendicular effort is applyed to the actuator, applys on the panel of test piece through load sharing roof beam symmetry, the data acquisition device is with data transfer to computer, the computer link and the controlling devic. Through the device carries out fatigue test, the reaction U -shaped rib that can be comparatively accurate and the actual stress state of panel junction, and the deformation of its panel and U -shaped rib also is close with the actual state.
Description
Technical field
This utility model relates to a kind of cross bridge floor board U-shaped rib and panel weld fatigue experimental device.
Background technology
In Orthotropic Steel Bridge Deck structure, panel directly bears the effect of automobile wheel load, and by mobile load
Pass to U-shaped rib (longitudinal rib).When automobile wheel load is between adjacent two U-shaped ribs, U-shaped rib is with panel even
Panel near welding seam and U-shaped rib bear the effect (such as Fig. 1 a, shown in 1b) drawing (pressure) power and moment of flexure,
Wherein U-shaped rib web bears pressure and outside moment of flexure, and under this load action, U-shaped rib is connected with panel
Weld seam likely produces the fatigue crack along weldering larynx direction.With panel attachment weld, U-shaped rib occurs that fatigue is split
After stricture of vagina, after particularly crackle splits weld seam, U-shaped rib and panel Joint failure, panel local downwarp increases,
The not only normal driving of impact, and repair extremely difficult, therefore, this position is that steel bridge deck resisting fatigue sets
The emphasis of meter and difficult point.
Improve the anti-fatigue performance of the various structure detail of steel bridge deck both at home and abroad mainly according to a large amount of tired examinations
The achievement tested.Below the fatigue test of cross bridge floor board U-shaped rib and panel junction mainly uses in early days
Two kinds of methods: method 1U shape rib both sides panel is hinged, is directly further applied load U-shaped rib, now U-shaped rib abdomen
Plate tension, and in real bridge, U-shaped rib is generally in pressured state；Method 2 be 4 spacing, assay device is numerous
Trivial, and U-shaped rib stress is the least, simply counter plate out-of-plane deformation has certain constraint.It addition, the U.S. and day
A kind of test load mode of this employing, U-shaped rib is not subject to power, but as welding Additional connections, this
The method of kind is not inconsistent with actual loading and the deformation state of U-shaped rib with panel junction.In a word, the most at present
The test method used, can not well react the actual forced status of U-shaped rib and panel junction.
Utility model content
For solving the problems referred to above, the purpose of this utility model is to provide a kind of cross bridge floor board U-shaped rib
With panel weld fatigue experimental device.
The purpose of this utility model is achieved through the following technical solutions:
A kind of cross bridge floor board U-shaped rib and panel weld fatigue experimental device, including: test specimen,
Test specimen restraint device, charger, control device, data acquisition unit and computer；
Wherein, described test specimen is fixed on described test specimen restraint device；
Described charger includes actuator and load-sharing girder, described load-sharing girder along the lateral arrangement of described test specimen,
Described load-sharing girder upper end is connected with described actuator, and both sides, described load-sharing girder lower end are respectively welded round steel
Rod, described round steel bar lower end is positioned at the top of described test specimen, applies line lotus for simulation on test specimen panel
Carry；
Described control device connects described actuator and applies vertical, and described vertical is passed through
Load-sharing girder symmetry puts on test specimen；
Described data acquisition unit includes readout instrument and multiple foil gauge, multiple displacement transducer；Described should
Become sheet and displacement transducer is separately mounted on described test specimen, and transferred data to by described readout instrument
Computer, described computer connects described control device.
Further, described test specimen includes:
One panel, it is parallel to horizontal direction；
One U-shaped rib, its length is identical with panel, by being welded to connect in described panel bottom surface；
Further, described test specimen restraint device includes U-shaped base, be provided with in the middle of described U-shaped base with
The groove that test specimen U-shaped rib is corresponding, described test specimen U-shaped rib and described U-shaped base are by U-shaped interior lining panel
Fix with high-strength bolt.
Further, the position that test specimen panel both sides are corresponding with load-sharing girder be provided with limiting plate, with fixing
Described load-sharing girder, prevents described load-sharing girder transverse shifting in process of the test.
Further, described limiting plate is bolted.
Further, described data acquisition unit includes 8 foil gauges and 3 displacement transducers.
Further, foil gauge is separately positioned on the end of the U-shaped rib of test specimen and two weld seams of panel,
Displacement transducer is arranged in both sides and the centre of U-shaped rib on test specimen panel.
Further, described U-shaped base bottom is fixed on testing bed, testing stand.
The beneficial effects of the utility model are:
Fatigue test is carried out, it is possible to accurately reaction U-shaped rib and face by device described in the utility model
The actual forced status of plate junction, the deformation of its panel and U-shaped rib is also close with virtual condition.
Accompanying drawing explanation
Fig. 1 a is plate stress schematic diagram at U-shaped rib and panel attachment weld；
Fig. 1 b is the load that in Fig. 1 a, panel and U-shaped rib bear at 1；
Fig. 2 a is U-shaped rib described in the utility model and panel weld fatigue experimental device structural representation；
Fig. 2 b is the Section A-A schematic diagram of Fig. 2 a；
Fig. 3 a is the physical dimension schematic diagram of test specimen described in this utility model embodiment；
Fig. 3 b is test specimen U-shaped rib described in this utility model embodiment and panel angle welding connecting structure details；
Fig. 4 a is foil gauge and displacement transducer installation site structure on test specimen cross section described in the utility model
Schematic diagram；
Fig. 4 b is that in panel plane described in the utility model, foil gauge and displacement transducer installation site structure are shown
It is intended to；
Fig. 4 c is foil gauge installation site structural representation at I in Fig. 4 a；
Fig. 4 d is foil gauge installation site structural representation at II in Fig. 4 b；
Wherein, 1-U shape rib, 2-panel, 3-load-sharing girder, 4-round steel bar, 5-bolt, 6-limiting plate, 7-is high
Strength bolts, 8-interior lining panel, 9-U shape base, 10-testing bed, testing stand, 11-actuator.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with attached
Figure and embodiment, be further elaborated to this utility model.Should be appreciated that described herein
Specific embodiment, only in order to explain this utility model, is not used to limit this utility model.
A kind of cross bridge floor board U-shaped rib and panel weld fatigue experimental device, as shown in Figure 2 a,
Including: test specimen, test specimen restraint device, charger, control device, data acquisition unit and computer；
Wherein, described test specimen is fixed on described test specimen restraint device；
Described test specimen includes:
One panel 2, it is parallel to horizontal direction；
One U-shaped rib 1, its length is identical with panel 2, by being welded to connect in described panel 2 bottom surface；
Described test specimen restraint device includes being provided with and test specimen U in the middle of U-shaped base 9, described U-shaped base 9
The groove that shape rib 1 is corresponding, described test specimen U-shaped rib 1 and described U-shaped base 9 are by U-shaped interior lining panel
8 and high-strength bolt 7 fix.It is fixed on testing bed, testing stand 10 bottom described U-shaped base 9.
Described charger includes actuator 11 and load-sharing girder 3, and described load-sharing girder 3 is along the horizontal stroke of described test specimen
To layout, described load-sharing girder 3 upper end is connected with described actuator 11, and both sides, described load-sharing girder 3 lower end
Being respectively welded round steel bar 4, described round steel bar 4 lower end is positioned at the top of described test specimen；Test specimen panel 2 liang
The position that side is corresponding with described load-sharing girder 3 be provided with limiting plate 6, with fixing described load-sharing girder 3.Described
Limiting plate 6 is fixed by bolt 5.
Described control device connects described actuator 11 and applies vertical, and described vertical is led to
Cross load-sharing girder 3 symmetry to put on test specimen.
Described data acquisition unit includes readout instrument and multiple foil gauge, multiple displacement transducer；Described should
Become sheet and displacement transducer is separately mounted on described test specimen, and transferred data to by described readout instrument
Computer, described computer connects described control device.Described data acquisition unit includes 8 foil gauges
With 3 displacement transducers.Such as Fig. 4 a～4d, foil gauge is separately positioned on U-shaped rib and the panel of test specimen
Article two, the end of weld seam, displacement transducer is arranged in both sides and the centre of U-shaped rib on test specimen panel.
Due to reasons such as test specimen mismachining tolerance, the testing machine actuator errors of centralization, under load action, this
Carrying out symmetrical structure actual loading may be asymmetric, first precompressed 2 times before formally starting static test,
The most repeatedly adjust test specimen and load-sharing girder position so that the strain at 4 angles of panel end face substantially close to.Need
It is noted that as ensureing that the load applied is evenly applied on test specimen as far as possible, 18 test specimens altogether
Paste List foil gauge is adjusted, and has carried out static test.
Static test hierarchical loading, from the beginning of 0, differential for 5kN, it is added to 65kN always, is repeated 3 times,
Average, be result of the test.
The measured value of all stress and displacement measuring points is all linearly increasing with the increase of load, shows at test specimen
In elastic state；Measured value and calculated value coincide preferably, show that Theoretical Calculation is the most truly
React the stress of practical structures.
On panel, the stress of 4 measuring points is closely, shows that finder charge is uniform, is applied symmetrically to examination
On part.When finder charge reaches 65kN, maximum stress is about 200MPa, bending much smaller than steel
Take stress.
When load action is between adjacent two U-shaped ribs, weld seam vertically also exist bigger with weldering larynx direction
Stress, show weld larynx direction be potential fatigue crack direction.The stress value difference of different measuring points is bigger
Mainly affected by the not equal factor of weld shape, strain gauge adhesion position and the joint penetration degree of depth.
Fatigue test is carried out, it is possible to accurately reaction U-shaped rib and face by device described in the utility model
The actual forced status of plate junction, the deformation of its panel and U-shaped rib is also close with virtual condition.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model,
For a person skilled in the art, this utility model can have various modifications and variations.All in this reality
Within novel spirit and principle, any modification, equivalent substitution and improvement etc. made, all should comprise
Within protection domain of the present utility model.
Claims (7)
1. a cross bridge floor board U-shaped rib and panel weld fatigue experimental device, it is characterised in that including: test specimen, test specimen restraint device, charger, control device, data acquisition unit and computer；
Wherein, described test specimen is fixed on described test specimen restraint device；
Described charger includes actuator (11) and load-sharing girder (3), described load-sharing girder (3) is along the lateral arrangement of described test specimen, described load-sharing girder (3) upper end is connected with described actuator (11), and described load-sharing girder (3) both sides, lower end are respectively welded round steel bar (4), described round steel bar (4) lower end is positioned at the top of described test specimen；
Described control device connects described actuator (11) and applies vertical, and described vertical is put on test specimen by load-sharing girder (3) symmetry；
Described data acquisition unit includes readout instrument and multiple foil gauge, multiple displacement transducer；Described foil gauge and displacement transducer are separately mounted on described test specimen, and transfer data to computer by described readout instrument, and described computer connects described control device.
Cross bridge floor board U-shaped rib the most according to claim 1 and panel weld fatigue experimental device, it is characterized in that, described test specimen restraint device includes U-shaped base (9), being provided with the groove corresponding with test specimen U-shaped rib (1) in the middle of described U-shaped base (9), described test specimen U-shaped rib (1) is fixed by U-shaped interior lining panel (8) and high-strength bolt (7) with described U-shaped base (9).
Cross bridge floor board U-shaped rib the most according to claim 1 and panel weld fatigue experimental device, it is characterized in that, the position that test specimen panel (2) both sides are corresponding with described load-sharing girder (3) be provided with limiting plate (6), with fixing described load-sharing girder (3).
Cross bridge floor board U-shaped rib the most according to claim 3 and panel weld fatigue experimental device, it is characterised in that described limiting plate (6) is fixed by bolt (5).
Cross bridge floor board U-shaped rib the most according to claim 1 and panel weld fatigue experimental device, it is characterised in that described data acquisition unit includes 8 foil gauges and 3 displacement transducers.
Cross bridge floor board U-shaped rib the most according to claim 1 and panel weld fatigue experimental device, it is characterized in that, foil gauge is separately positioned on the end of the U-shaped rib of test specimen and two weld seams of panel, and displacement transducer is arranged in both sides and the centre of U-shaped rib on test specimen panel.
Cross bridge floor board U-shaped rib the most according to claim 2 and panel weld fatigue experimental device, it is characterised in that described U-shaped base (9) bottom is fixed on testing bed, testing stand (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620279914.0U CN205607789U (en) | 2016-04-06 | 2016-04-06 | Quadrature opposite sex decking U -shaped rib and panel splice fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620279914.0U CN205607789U (en) | 2016-04-06 | 2016-04-06 | Quadrature opposite sex decking U -shaped rib and panel splice fatigue test device |
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| CN205607789U true CN205607789U (en) | 2016-09-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051172A (en) * | 2017-12-27 | 2018-05-18 | 湖南响箭重工科技有限公司 | Swing arm type landing leg fatigue test device and test method |
| CN108426765A (en) * | 2018-03-30 | 2018-08-21 | 西南交通大学 | The fatigue experimental device of steel bridge deck test specimen |
| CN114942188A (en) * | 2022-06-07 | 2022-08-26 | 山东农业大学 | Orthotropic deck plate fatigue test device and fatigue performance evaluation method |
-
2016
- 2016-04-06 CN CN201620279914.0U patent/CN205607789U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051172A (en) * | 2017-12-27 | 2018-05-18 | 湖南响箭重工科技有限公司 | Swing arm type landing leg fatigue test device and test method |
| CN108426765A (en) * | 2018-03-30 | 2018-08-21 | 西南交通大学 | The fatigue experimental device of steel bridge deck test specimen |
| CN114942188A (en) * | 2022-06-07 | 2022-08-26 | 山东农业大学 | Orthotropic deck plate fatigue test device and fatigue performance evaluation method |
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