CN109001060A - A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method - Google Patents
A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method Download PDFInfo
- Publication number
- CN109001060A CN109001060A CN201810808716.2A CN201810808716A CN109001060A CN 109001060 A CN109001060 A CN 109001060A CN 201810808716 A CN201810808716 A CN 201810808716A CN 109001060 A CN109001060 A CN 109001060A
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- China
- Prior art keywords
- hoist cable
- anchored end
- pulling force
- fatigue
- sunpender
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
Abstract
The invention discloses a kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and methods, yoke plate including self-balancing bracket and support frame, fixed anchored end and tension-adjustable, fixed anchored end is connected to one end of self-balancing bracket, and yoke plate is connected to the other end of self-balancing bracket；Hoist cable one end is drawn to be connected to fixed anchored end, the other end and yoke plate anchor；Draw the Working-Clip sleeve for hanging cable force loaded members mounted in drawing on hoist cable, sunpender is connected to intermediate plate by connector.Test method includes that hoist cable will be drawn to be connected to fixed anchored end and yoke plate, the tension adjustment of hoist cable will be drawn to the minimum tension value of test requirements document and by the lateral lateral reinforcing of the application on sunpender.Experimental rig, which can really reflect, draws hoist cable fatigue rupture, and power transmission is clear, model is simple and operation is simple；Test method can simulate fretting fatigue, the bending stress fatigue of drawing hoist cable, the failure mode of connector and the anchored end rotation fatigue drawn at hoist cable and anchored end.
Description
Technical field
The invention belongs to bridge technology field, especially a kind of drawing hoist cable pulling force width and the two-way index fatigue of anchored end corner
Experimental rig and method.
Background technique
As the main bearing member of suspension bridge and suspension cable, draw hoist cable by the lotus of stiffening girder of suspension bridge, cable-stayed bridge main-beam
Load is transmitted to main push-towing rope or bridge tower, to guarantee the normal operation of cableway platform.Draw the hoist cable service life design time limit general
It is 30 years, but its service life of ordinary circumstance is well below design requirement.Load-bearing bridge is easy to produce under Under Dynamic Load along bridge
The swing of the vertical, horizontal of beam leads to that hoist cable is drawn to occur repeatedly by curved, since shorter drawing hoist cable rigidity is bigger, to be easier to
Cause fatigue rupture.Under live loading, draw hoist cable bear variation load so as to cause draw hoist cable in steel wire internal force constantly
Change, this change makes steel wire be subjected to that alternate stress is back and forth drawn to be easy to cause drawing hoist cable inside configuration steel wire generation fatigue broken
It is bad.
From another angle, draw hoist cable that can generate small corner at the anchoring with girder junction, long-term
Dynamic loading under, draw the upper and lower anchor head junction of hoist cable steel wire answered by reciprocal bending stress so as to cause section of steel wire
Power generates tension and compression Cyclic Stress and generates steel wire fatigue.Additionally, due to small corner can be generated at anchoring, also can over time
Generate destruction.
For straddle-type anchored end draw hoist cable for, wirerope draw hoist cable around anchoring end position at, due to hoist cable by
To alternate load and lead to ride knee by reciprocal bending load, be easy to produce flexural fatigue.
Research shows that: the main mode for drawing hoist cable to destroy is fatigue rupture.And influence cable body fatigue behaviour because being known as
Many can substantially be divided into:
(1) property of hoist cable itself is drawn, such as: structure, material, intensity, rigidity, wire rope core oil surface, treatment process etc.；
(2) cable body runs factor, such as alternate stress amplitude, impact force, environment；
(3) situation of the anchoring situation and anchorage and connecting pin of wirerope and anchorage.
In current drawing hoist cable fatigue test, only to drawing hoist cable to apply alternation xial feed, do not apply simultaneously curved
The experimental rig of bent load.Test can not react at anchoring and hoist cable is around the stress at cord clip position.
Summary of the invention
The object of the present invention is to provide a kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and
Method can be achieved with drawing the variation of hoist cable axle power and corner by applying smaller cross force.
Realize that the technical solution of the object of the invention is as follows:
A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner, including self-balancing bracket and support
Frame；The self-balancing bracket is the upper and lower rectangle frame being parallel to each other, and support frame is the vertical supporting column for connecting upper and lower rectangle frame；
It further include the yoke plate of fixed anchored end and tension-adjustable, fixed anchored end is connected to self-balancing bracket by the first anchor frame
One end, yoke plate are connected to the other end of self-balancing bracket by the second anchor frame；Hoist cable one end is drawn to be connected to fixed anchored end, separately
One end and yoke plate anchor；It further include drawing to hang cable force loaded members, it includes intermediate plate, connector that cable force loaded members are hung in the drawing
And sunpender, for Working-Clip sleeve mounted in drawing on hoist cable, sunpender is connected to intermediate plate by connector.
Further, the fixed anchored end is pin joint formula anchored end, and the drawing hoist cable is that pin joint formula draws hoist cable.
Further, the fixed anchored end is straddle-type anchored end, and the drawing hoist cable is that straddle-type anchored end draws hoist cable.
The alternative solution of any of the above-described a technical solution is that the sunpender replaces with loading head, and loading head passes through connector
It is connected to intermediate plate.
A kind of drawing hoist cable pulling force width and the two-way index fatigue test method of anchored end corner, including
Step 1: hoist cable one end will be drawn to be connected to fixed anchored end, the other end and yoke plate anchor；
Step 2: the tension adjustment of hoist cable will be drawn to the minimum tension value of test requirements document；
Step 3: by applying lateral lateral reinforcing on sunpender, realizing pulling force width and anchored end corner Two indices fatigue
Test.
Further, in the step 3, by applying lateral lateral reinforcing on sunpender, the equipment of use is very heavy
Top.
The alternative solution of above method technical solution is that the sunpender replaces with loading head；Step 3 replacement are as follows: logical
It crosses and applies lateral lateral reinforcing on loading head, realize pulling force width and anchored end corner Two indices fatigue test.
Further, in the step 3, by applying lateral lateral reinforcing on loading head, the equipment of use is tired
Labor testing machine or vibration excitor.
The beneficial effects of the present invention are: compared with prior art, the examination for drawing hoist cable fatigue rupture can really be reflected by devising
Experiment device has many advantages, such as that power transmission is clear, model is simple and operation is simple.The invention also provides consider bending stress, anchor
Gu Chu and hoist cable around the stress at cord clip position test method, can simulate fretting fatigue that hoist cable and cord clip go out,
Bending stress fatigue, the failure mode of connector and the anchored end rotation fatigue of hoist cable.Test result can be broken for hoist cable fatigue
Bad accurate calculating with the necessary foundation of offer is provided, the state during can also being runed with Comprehensive Assessment hoist cable, therefore have
Significant scientific value and economic benefit.
Detailed description of the invention
Fig. 1 is the structure chart that pin joint formula draws hoist cable fatigue experimental device；
Fig. 2 is the structure chart that straddle-type draws hoist cable fatigue experimental device.
In figure, (1) pin joint formula anchored end, (2) pin joint formula draws hoist cable, and cable force loaded members are hung in the drawing of (3) pin joint formula, (4)
Self-balancing bracket and support frame, the yoke plate of (5) fixed anchored end and tension-adjustable, the straddle-type anchored end that (6) simplify, (7)
Simplified straddle-type anchored end draws hoist cable, and cable force loaded members are hung in the drawing of (8) straddle-type cord clip.
Specific embodiment
The following further describes the present invention with reference to the drawings.
The rectangle frame that self-balancing bracket is made of steel, for balancing the Initial cable force for drawing hoist cable.Support frame is vertical
Support column.Suo Li loaded members are made of intermediate plate, connector and sunpender (or loading head), can be concentrated force when laterally loading
Small-scale even distributed force is converted to avoid stress from concentrating.Both ends anchor frame is made of steel plate.
Self-balancing bracket and support frame are placed on ground, for undertaking test counter-force and as operating platform.
Pin joint formula anchored end 1 is fixed on the top center position of self-balancing bracket, and hoist cable 2 and pin joint formula anchored end 1 is drawn to sell
It connects, the other end of hoist cable and adjustable drag anchored end yoke plate is drawn to anchor.Pin joint formula draws the sunpender connection for hanging cable force loaded members
It, can be mobile to realize that any position loads in any position for drawing hoist cable to after jack.The drawing of pin joint formula is hung cable force and is added
When mount components are loading head, loading head can be loaded with fatigue tester or vibration excitor.
Hoist cable anchored end 6 of straddle-type drawing is fixed on the top center position of self-balancing bracket, and hoist cable 7 is drawn to draw across straddle-type
The yoke plate of the card slot in the middle position of the two side walls of hoist cable anchored end 6, the other end and adjustable pulling force of drawing hoist cable anchors.It rides
After straddle type anchored end draws the sunpender for hanging cable force loaded members to be connected to jack, can any position for drawing hoist cable it is mobile from
And it realizes any position and loads.Straddle-type drawing hang cable force loaded members be loading head when, fatigue tester or vibration excitor can be used
Loading head is loaded.
In this way, the Two indices for realizing drawing hoist cable axle power and corner by applying smaller cross force change repeatedly.
When being tested, draw hoist cable be fixed on self-balancing bracket, will draw the tension adjustment of hoist cable to test requirements document most
Xiao Zhang's force value realizes pulling force width and anchored end corner Two indices fatigue test by the way of laterally reinforcing on drawing hoist cable.?
Draw position and the amount of force for determining on hoist cable and making anchored end corner amplitude and hoist cable internal force amplitude being drawn all to meet test requirements document.
Claims (8)
1. a kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner, which is characterized in that including self-balancing
Bracket and support frame；The self-balancing bracket is the upper and lower rectangle frame being parallel to each other, and support frame is the upper and lower rectangle frame of connection
Vertical supporting column；It further include the yoke plate of fixed anchored end and tension-adjustable, fixed anchored end is connected to by the first anchor frame
One end of self-balancing bracket, yoke plate are connected to the other end of self-balancing bracket by the second anchor frame；Hoist cable one end is drawn to be connected to
Fixed anchored end, the other end and yoke plate anchor；It further include drawing to hang cable force loaded members, cable force loaded members packet is hung in the drawing
Intermediate plate, connector and sunpender are included, for Working-Clip sleeve mounted in drawing on hoist cable, sunpender is connected to intermediate plate by connector.
2. a kind of drawing hoist cable pulling force width as described in claim 1 and the two-way index fatigue experimental device of anchored end corner, special
Sign is that the fixed anchored end is pin joint formula anchored end (1), and the drawing hoist cable is that pin joint formula draws hoist cable (2).
3. a kind of drawing hoist cable pulling force width as described in claim 1 and the two-way index fatigue experimental device of anchored end corner, special
Sign is that the fixed anchored end is straddle-type anchored end (6), and the drawing hoist cable is that straddle-type anchored end draws hoist cable (7).
4. a kind of drawing hoist cable pulling force width as described in any one of claims 1-3 and the two-way index fatigue test dress of anchored end corner
It sets, which is characterized in that the sunpender replaces with loading head, and loading head is connected to intermediate plate by connector.
5. a kind of drawing hoist cable pulling force width and the two-way index fatigue test method of anchored end corner, which is characterized in that including
Step 1: hoist cable one end will be drawn to be connected to fixed anchored end, the other end and yoke plate anchor；
Step 2: the tension adjustment of hoist cable will be drawn to the minimum tension value of test requirements document；
Step 3: by applying lateral lateral reinforcing on sunpender, realizing pulling force width and the examination of anchored end corner Two indices fatigue
It tests.
6. a kind of drawing hoist cable pulling force width as claimed in claim 5 and the two-way index fatigue test method of anchored end corner, special
Sign is, in the step 3, by applying lateral lateral reinforcing on sunpender, the equipment of use is jack.
7. a kind of drawing hoist cable pulling force width as claimed in claim 5 and the two-way index fatigue test method of anchored end corner, special
Sign is that the sunpender replaces with loading head；Step 3 replacement are as follows: by applying lateral lateral reinforcing on loading head,
Realize pulling force width and anchored end corner Two indices fatigue test.
8. a kind of drawing hoist cable pulling force width as claimed in claim 7 and the two-way index fatigue test method of anchored end corner, special
Sign is, in the step 3, by apply on loading head it is lateral it is lateral reinforce, the equipment of use be fatigue tester or
Vibration excitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810808716.2A CN109001060A (en) | 2018-07-18 | 2018-07-18 | A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810808716.2A CN109001060A (en) | 2018-07-18 | 2018-07-18 | A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method |
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| Publication Number | Publication Date |
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| CN109001060A true CN109001060A (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810808716.2A Pending CN109001060A (en) | 2018-07-18 | 2018-07-18 | A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115493925A (en) * | 2022-11-01 | 2022-12-20 | 安徽工业大学 | Bridge sling tension-torsion corrosion fatigue coupling test device and test method |
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2018
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| CN101183061A (en) * | 2006-11-14 | 2008-05-21 | 东芝电梯株式会社 | Wire rope end connector fatigue test apparatus |
| US7552649B1 (en) * | 2008-07-29 | 2009-06-30 | Cheng Uei Precision Industry Co., Ltd. | Cable testing device |
| CN101393094A (en) * | 2008-10-10 | 2009-03-25 | 江阴华新钢缆有限公司 | Avertence tensile machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115493925A (en) * | 2022-11-01 | 2022-12-20 | 安徽工业大学 | Bridge sling tension-torsion corrosion fatigue coupling test device and test method |
| CN115493925B (en) * | 2022-11-01 | 2024-04-09 | 安徽工业大学 | Bridge suspension cable tension-torsion corrosion fatigue coupling test device and test method |
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