CN104535406A - Fatigue loading device of steel truss bridge welded joint under multi-axis loading effect - Google Patents
Fatigue loading device of steel truss bridge welded joint under multi-axis loading effect Download PDFInfo
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- CN104535406A CN104535406A CN201410781509.4A CN201410781509A CN104535406A CN 104535406 A CN104535406 A CN 104535406A CN 201410781509 A CN201410781509 A CN 201410781509A CN 104535406 A CN104535406 A CN 104535406A
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Abstract
The invention relates to a fatigue loading device of a steel truss bridge welded joint under a multi-axis loading effect. The fatigue loading device comprises three main parts including an end combined type bearing framework, a hydraulic jack and a precision force sensor, wherein the end combined type bearing framework comprises four parts including a framework base, a framework arm, a circular disc linking part and a fixed anchor block; the hydraulic jack is fixed on the framework arm by bolting between an additional steel plate and a pull rod of the framework arm; the precision force sensor is arranged between the hydraulic jack and a steel truss bridge welded joint member; the fixed anchor block adopts a groove-shaped steel block and is used for bolting and anchoring the steel truss bridge welded joint member; the angle of the framework arm can be adjusted under the control of a hinging system composed of the circular disc linking part, a hollow thin-wall cylinder and a solid cylinder; and the length of the framework arm can be adjusted so that the aim that complicated steel truss bridge welded joint members with different angles can be accurately loaded, and the operation is simple.
Description
Technical field
The invention belongs to field of civil engineering, be specifically related to the fatigue loading device of a kind of steel girder bridge complicated welded connections under multiaxis load action.
Background technology
Complicated welded connections has overall performance good because of it, save steel and high-strength bolt, handsome in appearance, facilitate building site to install, improve the advantages such as girder steel industrial manufacturing degree, in the steel girder bridge that China builds in recent years, obtain application.But because the rod member of this category node junction is numerous, complex structure, be in typical multiaxis load action and spatial complex stress, its fatigue behaviour determines the safety of bed rearrangement bridge and durable, at extraneous variable cycle load as under the effect of the load such as vehicular load and wind load, can there is crackle, even rupture in complicated welded connections, and then jeopardize safety in production in use for some time because of Multiaxial Fatigue Damage.
There are the problems referred to above to prevent steel girder bridge complicated welded connections, fatigue checking computations in advance can be just carried out in the design phase, take necessary antifatigue measure, and then the appearance of effective containment fatigure failure, therefore how accurately the fatigue behaviour under multiaxis load action of tested steel truss-type bridges complicated welded connections becomes current urgent problem.
Summary of the invention
The object of the present invention is to provide the fatigue loading device of a kind of steel girder bridge complicated welded connections under multiaxis load action, for the fatigue behaviour under multiaxis load action of tested steel truss-type bridges complicated welded connections.
To achieve these goals, the invention provides following technical scheme:
The fatigue loading device of steel girder bridge complicated welded connections under multiaxis load action, comprises end combined bearing frame, three hydraulic jack, precision force transducer three parts;
Described end combined bearing frame comprises frame base, three frame arm, disk connectors and fixing anchor blocks, four parts; Described frame base and the xsect of frame arm are all the rectangular frame of two blocks of " 25b type " common channel-section steels and two block plates composition, and two blocks of " 25b type " common channel-section steels be arranged in parallel, and two block plates are separately positioned on the two ends of " 25b type " common channel-section steel; Steel girder bridge complicated welded connections component is fixed on frame base by fixing anchor block, and additional rectangular steel plates is all welded in three node ends of steel girder bridge complicated welded connections component, realizes the applying of eccentric fatigue load; Three frame arm are hinged successively, and the frame arm of head end is connected by disk connector with frame base, and the frame arm of end is connected by disk connector with frame base; Each hydraulic jack is fixed in a frame arm by the bolt between frame arm additional steel plates and pull bar, arranges precision force transducer between the movable end of each hydraulic jack and one piece of rectangular steel plates.
One end of described frame arm is the enclosed construction that steel plate combination becomes, hollow thin-wall cylinder is set in end, fixed head is increased in order to realize the fixing of hollow thin-wall cylinder, first close remaining silent with the steel plate with frame arm uniform thickness at the other end, and frame arm side direction is steel plate extension at the other end and solid cylinder is set in end, and the internal diameter of hollow thin-wall cylinder is greater than the external diameter of solid cylinder to reach hinged object, in order to strengthen the steel plate stability of end, solid cylinder place, stiffener is set between frame arm and side direction steel plate.
Described disk connector is by steel plate dish, circular arc shifting chute, affixed bolt and the affixed bolt composition of slidingtype, described steel plate dish is provided with circular arc shifting chute, the wherein affixed end being bolted to hollow thin-wall cylinder place, to screw on again during installation matching nut, the end, solid cylinder place with the end, solid cylinder place of frame base adjacent frame boom or frame base fixed by the affixed bolt of slidingtype, the nut screwing clamping of affixed for slidingtype bolt only can be realized fixing frame arm when fixing, and frosted process will be done to increase the friction factor of nut and steel plate dish by the surrounding of circular arc shifting chute, prevent the movement of the affixed bolt of slidingtype.
The adjustable length of described frame arm.
Described fixing anchor block adopts flute profile bloom, and for fixing steel girder bridge complicated welded connections component, the anchoring of fixing employing bolt, the bottom two supports form making steel girder bridge complicated welded connections component is affixed.
Beneficial effect of the present invention is as follows:
The end combined bearing frame that the present invention proposes can effectively realize the fatigue loading of steel girder bridge complicated welded connections under multiaxis load action, the angle of frame arm can be adjusted by the control of the articulated system of disk connector and hollow thin-wall cylinder and solid cylinder composition, reach the object that all can accurately load the steel girder bridge complicated welded connections of different angles, simple to operate, be the fatigue loading device of a kind of good steel girder bridge complicated welded connections under multiaxis load action.
Accompanying drawing explanation
Fig. 1 is fatigue loading device elevation drawing of the present invention;
Fig. 2 is fatigue loading device II-II sectional view of the present invention;
Fig. 3 is fatigue loading device I-I sectional view of the present invention;
Fig. 4 is frame arm schematic diagram;
Fig. 5 is the III-III sectional view of frame arm;
Fig. 6 is that frame arm connects schematic diagram with frame base;
Fig. 7 is disk connector schematic diagram;
Fig. 8 is end combined bearing frame cross sectional representation;
Fig. 9 is that steel girder bridge complicated welded connections loads schematic diagram.
In figure, 1-holds combined bearing frame, 2-hydraulic jack, 3-precision force transducer, 4-rectangular steel plates, 5-steel girder bridge complicated welded connections component, 11-frame base, 12-frame arm, 13-disk connector, 14-fixes anchor block, 121-hollow thin-wall cylinder, 122-solid cylinder, 123-frame arm additional steel plates, 124-pull bar, 125-fixed head, 126-stiffener, 131-steel plate dish, 132-circular arc shifting chute, the affixed bolt of 133-, the affixed bolt of 134-slidingtype.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The fatigue loading device of steel girder bridge complicated welded connections under multiaxis load action, comprises end combined bearing frame 1, three hydraulic jack 2, precision force transducer 3 three parts;
End combined bearing frame 1 as described in Fig. 1, Fig. 8 comprises frame base 11, three frame arm 12, disk connectors 13 and fixing anchor blocks 14 4 parts; Described frame base 11 and the xsect of frame arm 12 are all the rectangular frame of two blocks of " 25b type " common channel-section steels and two block plates composition, and two blocks of " 25b type " common channel-section steels be arranged in parallel, and two block plates are separately positioned on the two ends of " 25b type " common channel-section steel; Steel girder bridge complicated welded connections component is fixed on frame base by fixing anchor block 14, and additional rectangular steel plates 4 is all welded in three node ends of steel girder bridge complicated welded connections component 5, realizes the applying of eccentric fatigue load; Three frame arm 12 are hinged successively, and the frame arm of head end is connected by disk connector with frame base, and the frame arm of end is connected by disk connector with frame base; Each hydraulic jack 2 is fixed in a frame arm 12 by the bolt between frame arm additional steel plates 123 and pull bar 124, arranges precision force transducer 3 between the movable end of each hydraulic jack 2 and one piece of rectangular steel plates 4.
As Fig. 2, Fig. 3, Fig. 4, Fig. 5, one end of frame arm 12 described in Fig. 6 is the enclosed construction that steel plate combination becomes, hollow thin-wall cylinder 121 is set in end, fixed head 125 is increased in order to realize the fixing of hollow thin-wall cylinder 121, first close remaining silent with the steel plate with frame arm 12 uniform thickness at the other end, and frame arm 12 side direction is steel plate extension at the other end and solid cylinder 122 is set in end, and the internal diameter of hollow thin-wall cylinder 121 is greater than the external diameter of solid cylinder 122 to reach hinged object, in order to strengthen the steel plate stability of end, solid cylinder 122 place, stiffener 126 is set between frame arm 12 and side direction steel plate.
As shown in Figure 7, described disk connector is by steel plate dish 131, circular arc shifting chute 132, affixed bolt 133 and the affixed bolt 134 of slidingtype form, described steel plate dish is provided with circular arc shifting chute, wherein affixed bolt 133 is fixed on the end at hollow thin-wall cylinder 121 place, to screw on again during installation matching nut, the affixed bolt of slidingtype 134 fixing and the end, solid cylinder 122 place of frame base adjacent frame boom 12 or the end, solid cylinder 122 place of frame base 11, the nut screwing clamping of affixed for slidingtype bolt 134 only can be realized fixing frame arm 12 when fixing, and frosted process will be done to increase the friction factor of nut and steel plate dish 131 by the surrounding of circular arc shifting chute 132, prevent the movement of the affixed bolt 134 of slidingtype.The section form of steel girder bridge complicated welded connections component 5 mostly is hollow box-shaped and I-shaped.
As shown in Figure 9, by the length of conditioning box boom 12, the loading to steel girder bridge complicated welded connections component 5 when α angle and β angle number change can be adapted to.
Fixing anchor block 15 as shown in Figure 1, Figure 2, described in Fig. 3, Fig. 9 adopts flute profile bloom, and for fixing steel girder bridge complicated welded connections component 5, the anchoring of fixing employing bolt, the bottom two supports form making steel girder bridge complicated welded connections component 5 is affixed.
Claims (4)
1. the fatigue loading device of steel girder bridge welding node under multiaxis load action, comprises end combined bearing frame (1), three hydraulic jack (2), force snesor (3) three parts;
Described end combined bearing frame (1) comprises frame base (11), three frame arm (12), disk connector (13) and fixing anchor block (14) four parts; Described frame base (11) and the xsect of frame arm (12) are all the rectangular frame of two blocks of " 25b type " common channel-section steels and two block plates composition, two blocks of " 25b type " common channel-section steels be arranged in parallel, and two block plates are separately positioned on the two ends of " 25b type " common channel-section steel; Steel girder bridge complicated welded connections component is fixed on frame base by fixing anchor block (14), and additional rectangular steel plates (4) is all welded in three node ends of steel girder bridge complicated welded connections component, realizes the applying of eccentric fatigue load; Three frame arm (12) are hinged successively, and the frame arm of head end is connected by disk connector with frame base, and the frame arm of end is connected by disk connector with frame base; Each hydraulic jack (2) is fixed on a frame arm (12) by the bolt between frame arm additional steel plates (123) and pull bar (124), arranges force snesor (3) between the movable end of each hydraulic jack (2) and one piece of rectangular steel plates (4).
2. the fatigue loading device of a kind of steel girder bridge welding node according to claim 1 under multiaxis load action, it is characterized in that: one end of described frame arm (12) is the enclosed construction that steel plate combination becomes, hollow thin-wall cylinder (121) is set in end, fixed head (125) is increased in order to realize the fixing of hollow thin-wall cylinder (121), first close remaining silent with the steel plate with frame arm (12) uniform thickness at the other end, and frame arm (12) side direction is steel plate extension at the other end and solid cylinder (122) is set in end, and the internal diameter of hollow thin-wall cylinder (121) is greater than the external diameter of solid cylinder (122) to reach hinged object, in order to strengthen the steel plate stability of solid cylinder (122) end, place, stiffener (126) is set between frame arm (12) and side direction steel plate.
3. the fatigue loading device of a kind of steel girder bridge welding node according to claim 1 under multiaxis load action, it is characterized in that: described disk connector is by steel plate dish (131), circular arc shifting chute (132), affixed bolt (133) and the affixed bolt of slidingtype (134) composition, described steel plate dish is provided with circular arc shifting chute, wherein affixed bolt (133) is fixed on the end at hollow thin-wall cylinder (121) place, to screw on again during installation matching nut, the affixed bolt of slidingtype (134) is fixed and solid cylinder (122) end, place of frame base adjacent frame boom (12) or solid cylinder (122) end, place of frame base (11), the nut screwing clamping of affixed for slidingtype bolt (134) only can be realized fixing frame arm (12) when fixing, and frosted process will be done to increase the friction factor of nut and steel plate dish (131) by the surrounding of circular arc shifting chute (132), prevent the movement of the affixed bolt of slidingtype (134).
4. the fatigue loading device of a kind of steel girder bridge welding node according to claim 1 under multiaxis load action, is characterized in that: the adjustable length of described frame arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410781509.4A CN104535406B (en) | 2014-12-16 | 2014-12-16 | Fatigue loading device of steel truss bridge welded joint under multi-axis loading effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410781509.4A CN104535406B (en) | 2014-12-16 | 2014-12-16 | Fatigue loading device of steel truss bridge welded joint under multi-axis loading effect |
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| CN104535406B CN104535406B (en) | 2017-02-22 |
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| CN201410781509.4A Expired - Fee Related CN104535406B (en) | 2014-12-16 | 2014-12-16 | Fatigue loading device of steel truss bridge welded joint under multi-axis loading effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782623A (en) * | 2017-11-22 | 2018-03-09 | 上海筑邦测控科技有限公司 | Multi purpose space loading test platform |
Citations (7)
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|---|---|---|---|---|
| JPH06148046A (en) * | 1992-11-06 | 1994-05-27 | Japan Atom Energy Res Inst | Gripper for fatigue test piece |
| JPH06307999A (en) * | 1993-04-26 | 1994-11-04 | Kawasaki Steel Corp | Method and equipment for inspecting welded part of steel band |
| CN101105428A (en) * | 2007-07-10 | 2008-01-16 | 浙江大学 | Armoured concrete test teaching integrated loading device |
| CN103696368A (en) * | 2013-08-12 | 2014-04-02 | 中铁十六局集团第三工程有限公司 | Cantilever construction detachable triangle hanging basket load-bearing primary truss |
| CN203587339U (en) * | 2013-12-09 | 2014-05-07 | 华东交通大学 | Torsion component loading device |
| CN104142270A (en) * | 2014-07-31 | 2014-11-12 | 桂林理工大学 | Large reverse loading device |
| CN204269465U (en) * | 2014-12-16 | 2015-04-15 | 浙江大学 | The fatigue loading device of steel girder bridge welding node under multiaxis load action |
-
2014
- 2014-12-16 CN CN201410781509.4A patent/CN104535406B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06148046A (en) * | 1992-11-06 | 1994-05-27 | Japan Atom Energy Res Inst | Gripper for fatigue test piece |
| JPH06307999A (en) * | 1993-04-26 | 1994-11-04 | Kawasaki Steel Corp | Method and equipment for inspecting welded part of steel band |
| CN101105428A (en) * | 2007-07-10 | 2008-01-16 | 浙江大学 | Armoured concrete test teaching integrated loading device |
| CN103696368A (en) * | 2013-08-12 | 2014-04-02 | 中铁十六局集团第三工程有限公司 | Cantilever construction detachable triangle hanging basket load-bearing primary truss |
| CN203587339U (en) * | 2013-12-09 | 2014-05-07 | 华东交通大学 | Torsion component loading device |
| CN104142270A (en) * | 2014-07-31 | 2014-11-12 | 桂林理工大学 | Large reverse loading device |
| CN204269465U (en) * | 2014-12-16 | 2015-04-15 | 浙江大学 | The fatigue loading device of steel girder bridge welding node under multiaxis load action |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782623A (en) * | 2017-11-22 | 2018-03-09 | 上海筑邦测控科技有限公司 | Multi purpose space loading test platform |
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Granted publication date: 20170222 Termination date: 20201216 |