CN210571796U - Fatigue test device for steel box girder oblique web - Google Patents
Fatigue test device for steel box girder oblique web Download PDFInfo
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- CN210571796U CN210571796U CN201921067616.5U CN201921067616U CN210571796U CN 210571796 U CN210571796 U CN 210571796U CN 201921067616 U CN201921067616 U CN 201921067616U CN 210571796 U CN210571796 U CN 210571796U
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Abstract
The utility model provides a fatigue test device for an inclined web plate of a steel box girder, which belongs to the technical field of engineering detection and comprises two groups of supporting components which are respectively arranged at two ends of the inclined web plate and used for supporting the inclined web plate and keeping the inclined web plate in a vertical state and a loading component used for loading vertical acting force on an upper wing plate of the steel box girder; the supporting assembly comprises a plurality of end partition plates which are arranged at intervals along the length direction of the inclined web plate; the top end of the end clapboard is abutted against the bottom surface of the upper wing plate, the end clapboard positioned at the end part of the inclined web plate is connected with the end surface of the inclined web plate, and the other end clapboards are respectively connected with the plate surface of the inclined web plate; the testing device can realize the fatigue test of the inclined web plate of the full-scale test piece with smaller test load, and can consider the influence of the size effect of local welding defects, so that the obtained experimental result is more accurate than that of a reduced-scale test; the utility model provides a steel box girder oblique web fatigue test device realizes requiring lower and the less fatigue test mode of error to the loading equipment.
Description
Technical Field
The utility model belongs to the technical field of the engineering detects, more specifically says, relates to a steel box girder oblique web fatigue test device.
Background
With the rapid progress of the economy of China and the further increase of the investment of urban infrastructure, the steel box girder is widely applied to municipal bridge structures with excellent performance. The steel box girder is generally formed by connecting a top plate, a bottom plate, a web plate, a transverse clapboard, a longitudinal clapboard, a stiffening rib and the like in a full-welding mode; the web part is divided into a straight web and an inclined web according to different included angles with the bottom plate, and the inclined web has the advantages of being attractive, reducing the material consumption of the bottom plate, enabling the stress to be uniform and the like, so that the inclined web used in bridge construction is a trend.
Before the steel box girder is hoisted on site, the oblique web plates need to be welded and assembled in sections. After the assembly, the fatigue performance of the welded part of the inclined web of the steel box girder needs to be evaluated, and the test for evaluating the fatigue performance in the prior art comprises a full-scale test and a reduced-scale test.
In practical application, if a full-scale test is adopted, the fatigue resistance of the full-section steel box girder is large, so that the tonnage of loading equipment is required to be high in the experimental process, and a large amount of manpower and material resources are consumed; if the scale test is adopted, the fatigue performance is related to the construction details, and the scale test ignores some construction details, so that a large analysis error is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steel box girder oblique web fatigue test device, require too high and the great problem of error to loading equipment when aiming at solving among the prior art carrying out fatigue test.
In order to achieve the above object, the utility model adopts the following technical scheme: the fatigue test device for the inclined web plate of the steel box girder comprises two groups of supporting assemblies and a loading assembly, wherein the two groups of supporting assemblies are respectively arranged at two ends of the inclined web plate of the steel box girder and are used for supporting the inclined web plate and keeping the inclined web plate in a vertical state, and the loading assembly is arranged above the inclined web plate and is used for loading vertical acting force to an upper wing plate of the steel box girder;
the supporting assembly comprises a plurality of end partition plates which are arranged at intervals along the length direction of the inclined web plate, and the plate surfaces of the end partition plates are arranged along the vertical direction, wherein the end partition plates positioned on the outer side are connected with the end surface of the inclined web plate, and the rest end partition plates are respectively connected with the plate surface of the inclined web plate; the top end of each end baffle is abutted against the bottom surface of the upper wing plate.
Further, the supporting component further comprises transverse partition plates which are arranged on two sides of the inclined web plate surface and located below the loading portion of the loading component, and the top ends of the transverse partition plates are abutted to the bottom surface of the upper wing plate.
Further, concrete for improving rigidity and dispersing load is filled between every two adjacent end partition plates.
Furthermore, except the end partition plates positioned on the outer side, through holes for enabling the inclined web plate, the upper wing plate and the lower wing plate of the steel box girder to penetrate through are formed in the other end partition plates.
Furthermore, at least two groups of loading assemblies are arranged at intervals along the length direction of the inclined web plate; each group of loading assemblies comprises an actuator for providing thrust and a loading block connected with a power output end of the actuator; the power output end of the actuator moves along the vertical direction; the loading force of the loading block acts on the upper surface of the upper wing plate.
Furthermore, a loading plate is arranged at the power output end of the actuator; the loading block comprises a plurality of loading columns which are respectively connected with the loading plate, the loading columns are vertically arranged, and the bottom surface of the loading block surrounded by the plurality of loading columns is parallel to the upper surface of the upper wing plate.
Further, the loading subassembly is still including being used for supporting the reaction frame of actuator, the reaction frame is including setting up in the oblique web both sides of steel box girder and being used for supporting subaerial stand to and be connected and the bottom surface with two sets of stand tops and the top fixed connection's of actuator reaction roof beam.
Furthermore, be equipped with on the reaction frame and be used for monitoring the actuator with the interval of reaction frame and restriction the actuator outputs the spacing meter of loading power, spacing meter with the actuator electricity is connected.
Further, the steel box girder oblique web fatigue test device also comprises a blocking frame which is arranged on two sides of the oblique web and is abutted to the oblique web.
The utility model provides a steel case roof beam oblique web fatigue test device's beneficial effect lies in: compared with the prior art, the fatigue test device for the inclined web plate of the steel box girder provided by the utility model supports and fixes the two ends of the inclined web plate through the end partition plate, so that the inclined web plate is kept in a vertical state and loads a vertical acting force to the upper wing plate of the inclined web plate through the loading assembly, thereby achieving the test purpose, and on the basis of conforming to the stress law of the web plate, the fatigue test device with smaller required loading force compared with a full-scale test is realized; because the welding seams among all plates of the steel box girder and the heat effect of the welding seams are difficult to reduce the scale, the experimental result obtained by the experiment is more accurate than that obtained by a reducing scale experiment; to sum up two points, the utility model provides a steel box girder oblique web fatigue test device is one kind and requires lower and the less test device of error to loading equipment.
Drawings
Fig. 1 is a front view of a structure of a steel box girder oblique web fatigue test device provided by an embodiment of the present invention (for convenience of observation, a reaction frame in the figure only shows a side column, and a blocking frame also only shows one side);
3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 31 3; 3
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic structural view of an end baffle plate located at the end face of a diagonal web;
FIG. 5 is an enlarged view of a portion of FIG. 1 taken at circle C;
fig. 6 is a partial enlarged view of fig. 2 taken along circle D.
1. A diagonal web; 11. an upper wing plate; 12. a lower wing plate; 21. an end spacer; 211. a through hole; 22. a diaphragm plate; 23. concrete; 3. an actuator; 31. a loading plate; 4. loading a block; 41. loading the column; 5. a reaction frame; 51. a column; 52. a counter-force beam; 53. a limit meter; 6. a blocking frame; 61. a limiting plate; 62. a support plate; 63. a connecting plate.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Please refer to fig. 1 and fig. 2 together, the fatigue testing apparatus for the steel box girder oblique web provided by the present invention is now described, which comprises two sets of supporting components respectively disposed at two ends of the steel box girder oblique web for supporting the oblique web and keeping it in a vertical state, and loading components arranged above the oblique web 1 along the length direction of the oblique web 1 for loading a vertical acting force to the upper wing plate 11 of the steel box girder; specifically, the supporting assembly comprises a plurality of end partition plates 21 which are respectively arranged at two ends of the inclined web plate 1 and supported on the ground, and the end partition plates 21 are arranged at intervals along the length direction of the inclined web plate 1. Specifically, the end partition plates 21 positioned at the end parts of the inclined web plates 1 are connected with the end surfaces of the inclined web plates 1, and the other end partition plates 21 are respectively connected with the plate surfaces of the inclined web plates 1, so that the horizontal limit of the inclined web plates 1 is realized; the bottom of the end partition plate 21 is fixedly arranged on the ground, and the top of the end partition plate 21 is abutted against the bottom surface of the upper wing plate 11, so that the inclined web plate 1 is supported.
By adopting the technical scheme, the inclined web plate 1 is vertically arranged and fixed in the supporting assembly, the side surface of the inclined web plate 1 is abutted against the side surface of the end partition plate 21, the end surface of the inclined web plate 1 is abutted against the surface of the end partition plate 21, and the top end of the end partition plate 21 is abutted against the bottom surface of the upper wing plate 11, so that the inclined web plate 1 is supported and limited and fixed; utilize the loading subassembly to make progress pterygoid lamina 11 top loading effort, later loaded effort turns into fatigue load and follows oblique web 1's direction of height transmission, and this effort is for carrying out a component of the required loading force of loading through full scale experiment oblique web 1, promptly passes through the utility model provides a steel box girder oblique web fatigue test device carries out fatigue test, and required loading force is littleer than the required loading force of full scale experiment, reaches the purpose that reduces the loading equipment requirement. And, through the utility model provides an each welding seam is processed according to the experimental requirement of full chi among the oblique web fatigue test device of steel box girder, and the result of acquireing is more accurate than the scale test.
In order to avoid buckling of the upper wing plate 11 during the fatigue test, please refer to fig. 2 and 6 together, as the utility model provides a concrete implementation of steel box girder oblique web fatigue test device, the supporting component still includes the cross slab 22 that sets up in oblique web 1's both sides and be located the loading portion below of loading subassembly, and the top of cross slab 22 supports on the bottom surface of upper wing plate 11, when the loading portion of loading subassembly applys the effort to upper wing plate 11, cross slab 22 plays and supports upper wing plate 11 and goes to oblique web 1 with the more even transmission of the load of loading subassembly in, avoid oblique web 1 local too high effect of atress.
If the end partition plate 21 is broken during the fatigue test, the two ends of the inclined web plate 1 cannot be supported, so that a test accident occurs; in order to avoid such accidents, please refer to fig. 1 and 5, as a specific embodiment of the steel box girder oblique web fatigue testing apparatus provided by the present invention, concrete 23 for improving rigidity and dispersing load is filled between two adjacent end partition plates of each group, and compared with the prior art, the filling method does not need to open a hole to pour the concrete 23, and only needs to pour the concrete 23 into the cavity between the two end partition plates 21. Simplifying the operation before the concrete 23 is poured. Before the concrete 23 is poured, the openings on both sides of the end partition plates 21 are respectively provided with a template for blocking the openings to prevent the concrete 23 from leaking, so that the poured concrete 23 can be smoothly molded.
In order to guarantee that oblique web 1 can be spacing by end baffle 21 and support, please refer to fig. 3 and fig. 4 together, as the utility model provides a concrete implementation of steel box girder oblique web fatigue test device, except the end baffle 21 that is located the outside, all be equipped with the through-hole 211 that is used for making oblique web 1, upper wing plate 11 and steel box girder's lower wing plate 12 pass on remaining end baffle 21, the inner wall of through-hole 211 is spacing to oblique web 1.
Referring to fig. 2 and fig. 6 together, as a specific embodiment of the fatigue testing device for the inclined web of the steel box girder provided by the present invention, the loading assembly includes an actuator 3 for providing a thrust and a loading block 4 connected to an output end of the actuator 3; wherein, the actuator 3 is fixedly arranged above the upper wing plate 11, and the power output end moves along the vertical direction, and then drives the loading block 4 to provide acting force to the upper wing plate 11; in order to ensure that the force provided by the loading block 4 to the upper wing plate 11 is uniformly applied, the lower surface of the loading block 4 is parallel to the upper surface of the upper wing plate 11. When the loading assembly is used, the actuator 3 is started firstly, the power output end of the actuator 3 provides a vertical downward loading force for the loading block 4, the loading block 4 applies the loading force to the upper surface of the upper wing plate 11, and the loading of the inclined web plate 1 is realized through the transmission of the force.
Because the upper wing plate 21 is in an inclined state in the test process, in order to make each point of the loading stress part of the upper wing plate 11 uniformly stressed, please refer to fig. 6, as a specific implementation manner of the steel box girder oblique web fatigue test device provided by the utility model, the power output end of the actuator 3 is provided with a loading plate 31; the loading block 4 includes a plurality of loading columns 41 with the top ends connected with the bottom surface of the loading plate 31, the loading columns 41 are vertically arranged, the bottom ends of the loading columns 41 are parallel to the upper wing plate 11 and abut against the upper wing plate 11, specifically, the loading columns 41 are different in length and the top ends of the loading columns 41 are connected to the horizontal loading plate 31 to move in the vertical direction, and the bottom surfaces of the loading columns 41 are parallel to the upper surface of the upper wing plate 11, that is, in the same group of loading assemblies, the bottom ends of all the loading columns 41 are coplanar, the loading columns 41 abut against the upper wing plate 11 to enable stress at each point to be uniform, so that the phenomenon of stress concentration is avoided, and meanwhile, the occurrence of damage conditions of the loading columns 41 caused by different lengths of the.
Referring to fig. 2, as a specific embodiment of the fatigue testing device for the oblique web of the steel box girder provided by the present invention, the loading assembly further includes a reaction frame 5 for supporting the actuator 3, the reaction frame 5 is located above the actuator 3, and the bottom surface of the reaction frame 5 is fixedly connected to the top end of the actuator 3; specifically, the reaction frame 5 includes upright posts 51 arranged on both sides of the inclined web 1 and a reaction beam 52 horizontally connected to the top ends of the two upright posts 51, and the actuator 3 is fixed on the bottom surface of the reaction beam 52 and is located right above the position to be loaded on the upper wing plate 11.
Please refer to fig. 2, as a specific implementation manner of the steel box girder oblique web fatigue testing apparatus provided by the present invention, a spacing gauge 53 for monitoring the spacing between the actuator 3 and the reaction frame 5 and limiting the output loading force of the actuator 3 is disposed on the reaction frame 5, the specific reaction frame 5 detects the spacing between the actuator 3 and the reaction beam 52, and the spacing gauge 53 is electrically connected to the actuator 3.
Through adopting above-mentioned technical scheme, when carrying out the loading to oblique web 1, go up aerofoil 11 and actuator 3's power take off end and produce a reaction force, this reaction force pushes up actuator 3 on reaction beam 52, spacing meter 53 monitors the clearance between reaction beam 52 and actuator 3, if appear becoming flexible between reaction beam 52 and actuator 3, the oblique web 11 of explanation below has appeared great deformation, spacing meter 53 transmits this signal for actuator 3 through control system, make actuator 3 close, experimental termination, actuator 3 has been avoided continuing work and has been caused the accident.
Referring to fig. 1 and fig. 2 together, as a specific embodiment of the steel box girder oblique web fatigue testing apparatus provided by the present invention, the steel box girder oblique web fatigue testing apparatus further includes a blocking frame 6 disposed at both sides of the oblique web 1 and abutting against the oblique web 1; specifically, the blocking frame 6 comprises a limiting plate 61 abutted against the side surface of the upper wing plate 11, a supporting plate 62 and a connecting plate 63 which are obliquely arranged, the top end of the supporting plate 62 is fixedly connected with the top end of the limiting plate 61, and the bottom of the supporting plate 62 is obliquely outwards and fixed on the ground; the connecting plate 63 is horizontally disposed between the limiting plate 61 and the supporting plate 62 for reinforcing the connection relationship therebetween.
The baffle frame 6 has a limiting effect on the inclined web plate 1, and the inclined web plate 1 breaks through the end partition plate 21 and the concrete 23 to generate integral buckling during the test, so that the personal safety of field personnel during the test is ensured. The supporting plate 62 provides supporting force for the limiting plate 61, and the limiting plate 61 is abutted against the upper wing plate 11 to play a limiting role; meanwhile, the connecting plate 63 strengthens the strength of the limiting plate 61 and the supporting plate 62, and the stability of the blocking frame 6 is enhanced.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The fatigue test device for the steel box girder oblique web plate is characterized by comprising two groups of supporting assemblies and a loading assembly, wherein the two groups of supporting assemblies are respectively arranged at two ends of the steel box girder oblique web plate and used for supporting the oblique web plate and keeping the oblique web plate in a vertical state, and the loading assembly is arranged above the oblique web plate and used for loading a vertical acting force to an upper wing plate of the steel box girder;
the supporting assembly comprises a plurality of end partition plates which are arranged at intervals along the length direction of the inclined web plate, and the plate surfaces of the end partition plates are arranged along the vertical direction, wherein the end partition plates positioned on the outer side are connected with the end surface of the inclined web plate, and the rest end partition plates are respectively connected with the plate surface of the inclined web plate; the top end of each end baffle is abutted against the bottom surface of the upper wing plate.
2. The steel box girder oblique web fatigue testing device of claim 1, wherein the supporting component further comprises a diaphragm plate arranged on two sides of the oblique web plate surface and located below the loading part of the loading component, and the top end of the diaphragm plate abuts against the bottom surface of the upper wing plate.
3. The fatigue testing device for the inclined web of the steel box girder as recited in claim 1, wherein concrete for improving rigidity and dispersing load is filled between every two adjacent end partition plates.
4. The fatigue testing device for the inclined web of the steel box girder as claimed in claim 1, wherein except the end partition plates positioned at the outer sides, the other end partition plates are provided with through holes for the inclined web, the upper wing plate and the lower wing plate of the steel box girder to pass through.
5. The fatigue testing device for the inclined web of the steel box girder as recited in claim 1, wherein at least two groups of loading assemblies are arranged at intervals along the length direction of the inclined web; each group of loading assemblies comprises an actuator for providing thrust and a loading block connected with a power output end of the actuator; the power output end of the actuator moves along the vertical direction; the loading force of the loading block acts on the upper surface of the upper wing plate.
6. The fatigue testing device for the inclined web of the steel box girder as recited in claim 5, wherein a loading plate is arranged at the power output end of the actuator; the loading block comprises a plurality of loading columns which are respectively connected with the loading plate, the loading columns are vertically arranged, and the bottom surface of the loading block surrounded by the plurality of loading columns is parallel to the upper surface of the upper wing plate.
7. The steel box girder oblique web fatigue test device of claim 5, wherein the loading assembly further comprises a reaction frame for supporting the actuator, the reaction frame comprises upright columns which are arranged on two sides of the steel box girder oblique web and are used for supporting on the ground, and reaction beams which are connected with the top ends of the two sets of upright columns and are fixedly connected with the top ends of the actuator at the bottom surfaces.
8. The fatigue testing device for the inclined web of the steel box girder as recited in claim 7, wherein a limit meter for monitoring the distance between the actuator and the reaction frame and limiting the output loading force of the actuator is arranged on the reaction frame, and the limit meter is electrically connected with the actuator.
9. The fatigue testing device for the oblique web of the steel box girder according to any one of claims 1 to 8, further comprising a baffle frame arranged on two sides of the oblique web and abutted against the oblique web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921067616.5U CN210571796U (en) | 2019-07-09 | 2019-07-09 | Fatigue test device for steel box girder oblique web |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921067616.5U CN210571796U (en) | 2019-07-09 | 2019-07-09 | Fatigue test device for steel box girder oblique web |
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| CN210571796U true CN210571796U (en) | 2020-05-19 |
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| CN201921067616.5U Active CN210571796U (en) | 2019-07-09 | 2019-07-09 | Fatigue test device for steel box girder oblique web |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261250A (en) * | 2019-07-09 | 2019-09-20 | 邢台路桥建设总公司 | Steel box-girder skew web plate fatigue experimental device and fatigue test method |
| CN113293981A (en) * | 2021-06-30 | 2021-08-24 | 苏立超 | Integrated splicing type multi-layer wooden building template and use method thereof |
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2019
- 2019-07-09 CN CN201921067616.5U patent/CN210571796U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261250A (en) * | 2019-07-09 | 2019-09-20 | 邢台路桥建设总公司 | Steel box-girder skew web plate fatigue experimental device and fatigue test method |
| CN110261250B (en) * | 2019-07-09 | 2024-03-12 | 邢台路桥建设集团有限公司 | Fatigue test device and fatigue test method for inclined web plate of steel box girder |
| CN113293981A (en) * | 2021-06-30 | 2021-08-24 | 苏立超 | Integrated splicing type multi-layer wooden building template and use method thereof |
| CN113293981B (en) * | 2021-06-30 | 2023-11-03 | 新疆苏通工程建设有限公司 | Integrated spliced multi-layer wooden building template and application method thereof |
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Address after: No.239, Jianye South Road, Xingtai City, Hebei Province 054000 Patentee after: Xingtai road and Bridge Construction Group Co.,Ltd. Address before: No.239, Jianye South Road, Xingtai City, Hebei Province 054000 Patentee before: XINGTAI ROAD & BRIDGE CONSTRUCTION GENERAL Co.,Ltd. |