CN104535406B - 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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- CN104535406B CN104535406B CN201410781509.4A CN201410781509A CN104535406B CN 104535406 B CN104535406 B CN 104535406B CN 201410781509 A CN201410781509 A CN 201410781509A CN 104535406 B CN104535406 B CN 104535406B
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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 is and in particular to a kind of steel girder bridge complicated welded connections are in multiaxis load action
Under fatigue loading device.
Background technology
Complicated welded connections have overall performance good because of it, save steel and high-strength bolt, handsome in appearance, facilitate building site to pacify
The advantages of dress, raising girder steel industrial manufacturing degree, applied in the steel girder bridge that China builds in recent years.But due to
The rod member of such node junction is numerous, construction is complicated, be in typical multiaxis load action and spatial complex stress, and it is tired
Labor performance determine the safety of bed rearrangement bridge with durable, in extraneous variable cycle load such as the loads such as vehicular load and wind load
Under effect, can crackle in use for some time, even rupture because of Multiaxial Fatigue Damage in complicated welded connections, and then endanger
And safety in production.
In order to prevent steel girder bridge complicated welded connections from the problems referred to above occurring, can just carry out fatigue in the design phase and test in advance
Calculate, take necessary antifatigue measure, and then the effective appearance containing fatigue rupture, therefore how accurately to test steel truss
The fatigue behaviour under multiaxis load action of bridge complicated welded connections becomes current urgent problem.
Content of the invention
It is an object of the invention to provide a kind of fatigue under multiaxis load action for steel girder bridge complicated welded connections adds
Carry and put, for testing the fatigue behaviour under multiaxis load action of steel girder bridge complicated welded connections.
To achieve these goals, the present invention provides technical scheme below：
A kind of fatigue loading device under multiaxis load action for steel girder bridge complicated welded connections, holds including end combined type
Carry framework, three hydraulic jack, three parts of precision force transducer；
Described end combined bearing frame includes frame base, three frame arm, disk connectors and fixes anchor block four
Individual part；The cross section of described frame base and frame arm is all two pieces " 25b types " common channel-section steel and two pieces of steel plate compositions
Rectangular frame, two pieces " 25b type " common channel-section steel be arranged in parallel, and two blocks of steel plates are separately positioned on the two of " 25b type " common channel-section steel
End；Steel girder bridge complicated welded connections component is fixed on frame base by fixing anchor block, steel girder bridge complicated welded connections
Additional rectangular steel plates are all welded in three node ends of component, realize the applying of eccentric fatigue load；Three frame arm are cut with scissors successively
Connect, the frame arm of head end is connected by disk connector with frame base, the frame arm of end and frame base are joined by disk
Fitting connects；Each hydraulic jack is fixed in a frame arm by the bolt between frame arm additional steel plates and pull bar,
Precision force transducer is set between the movable end of each hydraulic jack and one piece of rectangular steel plates.
The enclosed construction that one end of described frame arm becomes for steel plate combination, arranges hollow thin-wall cylinder in end, in order to
Realize the fixation of hollow thin-wall cylinder and increase fixed plate, the other end first with the steel plate of frame arm uniform thickness to remain silent into
Row closing, and frame arm is laterally extended and arranges in end solid cylinder for steel plate in the other end, and hollow thin-wall cylinder
Internal diameter is more than the external diameter of solid cylinder to reach hinged purpose, in order to strengthen the steel plate stability of solid cylinder place end,
Stiffener is set between frame arm and lateral steel plate.
Described disk connector is made up of steel plate disk, circular arc shifting chute, affixed bolt and the affixed bolt of slidingtype, described
Steel plate disk be provided with circular arc shifting chute, the wherein affixed end being bolted to hollow thin-wall cylinder place, twist again during installation
Upper matching nut, the fixing solid cylinder place end with frame base adjacent frame boom of the affixed bolt of slidingtype or frame base
Solid cylinder place end, the nut screwing clamping of affixed for slidingtype bolt only be can achieve the fixation to frame arm when fixing,
And frosted process will be done to increase the coefficient of friction of nut and steel plate disk by the surrounding of circular arc shifting chute, prevent the affixed bolt of slidingtype
Movement.
The adjustable length of described frame arm.
Described fixing anchor block adopts flute profile bloom, is used for fixing steel girder bridge complicated welded connections component, fixing employing
Bolt anchoring, the bottom two supports form making steel girder bridge complicated welded connections component is affixed.
Beneficial effects of the present invention are as follows：
End proposed by the present invention combined bearing frame can effectively be realized to steel girder bridge complicated welded connections in multiaxis
Fatigue loading under load action, by the control of disk connector and the articulated system of hollow thin-wall cylinder and solid cylinder composition
System can adjust the angle of frame arm, reaches the mesh that the steel girder bridge complicated welded connections to different angles all can accurately load
, simple to operate, it is a kind of fatigue loading device under multiaxis load action for preferable steel girder bridge complicated welded connections.
Brief description
Fig. 1 is the fatigue loading device elevation of the present invention；
Fig. 2 is the fatigue loading device II-II profile of the present invention；
Fig. 3 is the fatigue loading device I-I profile of the present invention；
Fig. 4 is frame arm schematic diagram；
Fig. 5 is the III-III profile of frame arm；
Fig. 6 couples schematic diagram for frame arm with frame base；
Fig. 7 is disk connector schematic diagram；
Fig. 8 is end combined bearing frame cross-sectional view；
Fig. 9 loads schematic diagram for steel girder bridge complicated welded connections.
In figure, 1- end combined bearing frame, 2- hydraulic jack, 3- precision force transducer, 4- rectangular steel plates, 5- steel truss
Bridge formation complicated welded connections component, 11- frame base, 12- frame arm, 13- disk connector, 14- fixes anchor block, and 121- is hollow
Thin cylinder, 122- solid cylinder, 123- frame arm additional steel plates, 124- pull bar, 125- fixed plate, 126- stiffener, 131-
Steel plate disk, 132- circular arc shifting chute, the affixed bolt of 133-, the affixed bolt of 134- slidingtype.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
A kind of fatigue loading device under multiaxis load action for steel girder bridge complicated welded connections, holds including end combined type
Carry 1, three hydraulic jack 2 of framework, 3 three parts of precision force transducer；
End combined bearing frame 1 as described in Fig. 1, Fig. 8 includes 11, three frame arm 12 of frame base, disk connection
Part 13 and fixing 14 4 parts of anchor block；The cross section of described frame base 11 and frame arm 12 is all that two pieces " 25b types " are general
Groove steel and the rectangular frame of two pieces of steel plate compositions, two pieces " 25b type " common channel-section steel be arranged in parallel, and two blocks of steel plates are separately positioned on
The two ends of " 25b type " common channel-section steel；Steel girder bridge complicated welded connections component passes through fixing anchor block 14 and is fixed on frame base,
Additional rectangular steel plates 4 are all welded in three node ends of steel girder bridge complicated welded connections component 5, realize eccentric fatigue load
Apply；Three frame arm 12 are hinged successively, and the frame arm of head end is connected by disk connector with frame base, the framework of end
Arm is connected by disk connector with frame base；Each hydraulic jack 2 passes through frame arm additional steel plates 123 and pull bar 124
Between bolt be fixed in a frame arm 12, between the movable end of each hydraulic jack 2 and one piece of rectangular steel plates 4 arrange
Precision force transducer 3.
The enclosed construction that one end of frame arm 12 as described in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 becomes for steel plate combination, at end
Portion arranges hollow thin-wall cylinder 121, increases fixed plate 125 to realize the fixation of hollow thin-wall cylinder 121, in the other end
Closed to remaining silent with the steel plate with frame arm 12 uniform thickness first, and extend lateral for frame arm 12 simultaneously for steel plate in the other end
Solid cylinder 122 is set in end, and the internal diameter of hollow thin-wall cylinder 121 is hinged to reach more than the external diameter of solid cylinder 122
Purpose, in order to strengthen the steel plate stability of solid cylinder 122 place end, arrange between frame arm 12 and lateral steel plate and put more energy into
Plate 126.
As shown in fig. 7, described disk connector by steel plate disk 131, circular arc shifting chute 132, affixed bolt 133 and slides
The affixed bolt of formula 134 forms, and described steel plate disk is provided with circular arc shifting chute, and wherein affixed bolt 133 is fixed on hollow thin-wall
The end that cylinder 121 is located, matching nut of screwing on again during installation, the affixed bolt of slidingtype 134 is fixed and frame base adjacent frame
The solid cylinder 122 place end of the solid cylinder 122 place end of boom 12 or frame base 11, by slidingtype when fixing
The nut screwing clamping of affixed bolt 134 only can achieve the fixation to frame arm 12, and the surrounding of circular arc shifting chute 132 will do at frosted
Reason, to increase the coefficient of friction of nut and steel plate disk 131, prevents the movement of the affixed bolt of slidingtype 134.The complicated weldering of steel girder bridge
The section form connecing node component 5 mostly is hollow box-shaped and I-shaped.
As shown in figure 9, by the length adjusting frame arm 12, being adapted to when α angle and the change of β angle number to steel girder bridge
The loading of complicated welded connections component 5.
As shown in Figure 1, Figure 2, the fixing anchor block 15 described in Fig. 3, Fig. 9 adopts flute profile bloom, is used for fixing the complicated weldering of steel girder bridge
Connect node component 5, fixing using bolt anchoring, make steel girder bridge complicated welded connections component 5 bottom two supports form be
Affixed.
Claims (4)
1. fatigue loading device under multiaxis load action for a kind of steel girder bridge welding node, including end combined bearing frame
(1), three hydraulic jack (2), (3) three parts of force snesor；
Described end combined bearing frame (1) include frame base (11), three frame arm (12), disk connector (13) and
Fixing (14) four parts of anchor block；The cross section of described frame base (11) and frame arm (12) is all that two pieces " 25b types " are general
Groove steel and the rectangular frame of two pieces of steel plate compositions, two pieces " 25b type " common channel-section steel be arranged in parallel, and two blocks of steel plates are separately positioned on
The two ends of " 25b type " common channel-section steel；Steel girder bridge complicated welded connections component passes through fixing anchor block (14) and is fixed in frame base
On, additional rectangular steel plates (4) are all welded in three node ends of steel girder bridge complicated welded connections component, realize eccentric fatigue lotus
The applying carrying；Three frame arm (12) are hinged successively, and the frame arm of head end is connected by disk connector with frame base, end
Frame arm be connected by disk connector with frame base；Each hydraulic jack (2) passes through frame arm additional steel plates (123)
Bolt and pull bar (124) between, is fixed on a frame arm (12), the movable end of each hydraulic jack (2) and one piece
Setting force snesor (3) between rectangular steel plates (4).
2. fatigue loading device under multiaxis load action for a kind of steel girder bridge welding node according to claim 1,
It is characterized in that：The enclosed construction that one end of described frame arm (12) becomes for steel plate combination, in end setting hollow thin-wall circle
Cylinder (121), increases fixed plate (125) to realize the fixation of hollow thin-wall cylinder (121), uses first and framework in the other end
The steel plate of arm (12) uniform thickness is closed to remaining silent, and the other end lateral for frame arm (12) is extended for steel plate and sets in end
Put solid cylinder (122), and the internal diameter of hollow thin-wall cylinder (121) is hinged to reach more than the external diameter of solid cylinder (122)
Purpose, in order to strengthen the steel plate stability of solid cylinder (122) place end, setting between frame arm (12) and lateral steel plate adds
Strength plate (126).
3. fatigue loading device under multiaxis load action for a kind of steel girder bridge welding node according to claim 1,
It is characterized in that：Described disk connector by steel plate disk (131), circular arc shifting chute (132), affixed bolt (133) and slides
The affixed bolt of formula (134) forms, and described steel plate disk is provided with circular arc shifting chute, and wherein affixed bolt (133) is fixed on hollow
The end that thin cylinder (121) is located, matching nut of screwing on again during installation, the affixed bolt of slidingtype (134) is fixed and framework bottom
Solid cylinder (122) the place end of seat adjacent frame boom (12) or solid cylinder (122) the place end of frame base (11),
The nut screwing clamping of affixed for slidingtype bolt (134) only be can achieve the fixation to frame arm (12) when fixing, and circular arc moves
The surrounding of groove (132) will do frosted and process to increase the coefficient of friction of nut and steel plate disk (131), prevent the affixed bolt of slidingtype
(134) movement.
4. fatigue loading device under multiaxis load action for a kind of steel girder bridge welding node according to claim 1,
It 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN104535406A CN104535406A (en) | 2015-04-22 |
| CN104535406B true 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3247738B2 (en) * | 1992-11-06 | 2002-01-21 | 日本原子力研究所 | Fatigue specimen gripper |
| JPH06307999A (en) * | 1993-04-26 | 1994-11-04 | Kawasaki Steel Corp | Method and equipment for inspecting welded part of steel band |
-
2014
- 2014-12-16 CN CN201410781509.4A patent/CN104535406B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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