CN107101764A - A kind of experimental rig for being used to test main push-towing rope side force - Google Patents
A kind of experimental rig for being used to test main push-towing rope side force Download PDFInfo
- Publication number
- CN107101764A CN107101764A CN201710410055.3A CN201710410055A CN107101764A CN 107101764 A CN107101764 A CN 107101764A CN 201710410055 A CN201710410055 A CN 201710410055A CN 107101764 A CN107101764 A CN 107101764A
- Authority
- CN
- China
- Prior art keywords
- main push
- towing rope
- side force
- cable saddle
- load cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/06—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using mechanical means
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Abstract
The invention discloses a kind of experimental rig for being used to test main push-towing rope side force, cable saddle is fixed on the top center position of self-balancing type pedestal, and two side walls of cable saddle leave the vertical neck matched with load cell.Load cell is secured by bolts in orifice plate and forming array form by some sensing elements, and sensing element top surface directly contacts to test the side force of corresponding position with parallel steel wire.Parallel steel wire by two ends rope boots constitute tested main push-towing rope it is overall and with tension rod pin joint, realize that Suo Li is loaded by centre-hole jack so that thread in cable saddle from producing side force.Power transmission of the present invention clearly, operation it is simple, side force that can be at real-time testing different height, test result can for main push-towing rope side frictional force accurate calculating and the necessary foundation of offer is provided, therefore with significant scientific value and economic benefit.
Description
Technical field
The invention belongs to suspension bridge technical field, and in particular to the experiment dress of side force between a kind of test main push-towing rope and cable saddle
Put.
Background technology
As the major bearing structures of suspension bridge, main push-towing rope by the cable saddle at the top of bridge tower realize across full curve mistake
Cross, and produce CONTACT WITH FRICTION relation with cable saddle simultaneously.To ensure full bridge structure safety, can not occur to slide relatively between main push-towing rope and cable saddle
Move, namely require that the frictional force between main push-towing rope and cable saddle can not be poor less than the main push-towing rope power of cable saddle both sides, therefore the standard of antiskid frictional force
Really calculate most important.
It can be seen from Coulomb friction law, the design conditions of frictional force are the active forces between clear and definite contact surface.Due to cable saddle
The bottom surface of saddle groove is circular arc, therefore the main push-towing rope for undertaking axial force can produce radial load when by cable saddle in saddle groove bottom；Together
When again due to saddle groove lateral spacing act on, also can saddle groove side produce suitable side force.At present, the calculating letter of main push-towing rope radial load
It is single clear and definite, but still lack reliable main push-towing rope side force computational methods, and it is then more deficient for the experimental test of main push-towing rope side force,
This directly results in main push-towing rope side frictional force and is difficult to accurately calculate with making full use of.
With the further development of bridge construction, multi-span suspension bridges arise at the historic moment, and the bridge type is by increasing middle bridge tower
Mode realizes the span ability of overlength, is acknowledged as the preferable bridge type across wide water domains such as bay, straits.However, for many
When for tower suspension bridge, central tower side is fully loaded, opposite side is unloaded, the main push-towing rope power difference of middle Tasso saddle both sides will differ huge, and
Simplify processing mode according to existing cable saddle structure type and the tradition for ignoring the friction of main push-towing rope side, can not often meet main push-towing rope
Antiskid requirement, this turn into multi-span suspension bridges develop key restriction factors.
To solve to propose the Skid Resistance Measures that vertical friction plate is set up in cable saddle in the problem, engineering, the measure due to
The side friction face of main push-towing rope can be increased, therefore with theoretic feasibility, if but applied to real bridge, still need to lateral to solve
Condition premised on power problem, this just proposes more urgent reality need to developing rational main push-towing rope side force experimental rig
Ask.
The content of the invention
For the above-mentioned technical problem present in prior art, it is used to test main push-towing rope side force the invention provides a kind of
Experimental rig.
The technical solution adopted for the present invention to solve the technical problems is：
It is a kind of to be used to testing the experimental rig of main push-towing rope side force, including self-balancing type pedestal 1, stand on self-balancing type pedestal
Cable saddle 2 and tested main push-towing rope 8 dynamometry and load maintainer；Cable saddle 2 is fixed at the top center position of self-balancing type pedestal 1；
Leave the vertical neck 3 for laying array load cell 20, vertical neck 3 in the centre position of two side walls of cable saddle 2
Size match with array load cell；
Described array load cell is fixed on orifice plate 6 and forming array shape by some sensing elements 4 by bolt 5
Formula, depending on being vertically arranged the number of plies according to arrangement height of the parallel steel wire 7 in cable saddle 2, sensing element 4 directly with parallel steel wire 7
Contact to measure the side force of corresponding position；
Described loading device includes tension rod 10, centre-hole jack 11 and bolt-nut 12；Tension rod 10 is worn
Core type jack 11 and with the pin joint of rope boots 9 at the tested two ends of main push-towing rope 8, tighten bolt-nut 12 in the end of tension rod 10.Positioned at certainly
Centre-hole jack 11 between balanced type pedestal 1 and bolt-nut 12 realizes that Suo Li is loaded, by array load cell 20
Sensing element 4 senses the side force that parallel steel wire 7 is produced in cable saddle 2.
Sensing element 4 in the array load cell 20 is arranged in longitudinal direction at least arrangement three.
The beneficial effects of the invention are as follows：Compared with prior art, main push-towing rope and cable saddle knot can truly be reflected to the present invention by devising
The experimental rig and loading scheme of structure feature and stress relation, it is proposed that the lateral force test method of array, with power transmission clearly,
The advantages of model is simple and operates simple.Test result can be the accurate calculating of main push-towing rope side frictional force and make full use of offer
Necessary foundation, therefore with significant scientific value and economic benefit.
The present invention is further described with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the overall elevation of the present invention.
Fig. 2 is Fig. 1 partial top view.
Fig. 3 is sectional views of the Fig. 1 along AA directions.
Fig. 4 is the schematic diagram of the array load cell of the present invention.
In figure, 1. self-balancing type pedestals, 2. cable saddles, 3. vertical necks, 4. sensing elements, 5. bolts, 6. orifice plates, 7. is flat
Row steel wire, 8. tested main push-towing ropes, 9. rope boots, 10. tension rods, 11. centre-hole jacks, 12. bolt-nuts, 20. array dynamometry
Unit.
Specific embodiment
In the embodiment of the experimental rig of the main push-towing rope side force shown in Fig. 1~Fig. 4, self-balancing type pedestal 1 is placed in ground,
For undertaking experiment counter-force and as operating platform.Cable saddle 2 is fixed on the top center position of self-balancing type pedestal 1, cable saddle 2
Vertical neck 3 is left in the centre position of two side walls, for laying array load cell 20, if array load cell 20 by
Dry sensing element 4 is in turn secured to constitute on orifice plate 6 by bolt 5.To avoid " dimensional effect ", sensing element 4 is in longitudinal direction
At least arrangement three is arranged, in the vertical arrangement number of plies then foundation cable saddle 2 depending on the arrangement height of parallel steel wire 7.Vertical neck 3
Size matches with load cell, therefore constraint reaction can be provided for load cell, and can ensure that side force is directly acted on
On the sensing element 4 of corresponding position.On the other hand, be tested main push-towing rope 8 be made up of substantial amounts of parallel steel wire 7, parallel steel wire 7 according to
Predetermined arrangement mode passes through cable saddle 2, and constitutes entirety by rope boots 9 at two ends.Tension rod 10 passes through centre-hole jack 11, and
With the pin joint of rope boots 9, the end of tension rod 10 is provided with bolt-nut 12.Start centre-hole jack 11, tested main push-towing rope 8 can be carried out
Tensioning is loaded.
The specific test method of the present embodiment is：The sensing element 4 of predetermined quantity is in turn secured to by bolt 5 first
On orifice plate 6, so as to form array load cell, and the device is embedded in vertical neck 3；According to predetermined arrangement shape
Formula, the parallel steel wire 7 of the section of cable saddle 2 is regularly arranged and be put into saddle groove；Then, tension rod 10 is passed through into self-balancing type pedestal
1 reserving hole, and with the pin joint of rope boots 9 of tested main push-towing rope 8；Centre-hole jack 11 is installed at the two ends of self-balancing type pedestal 1,
And extend there through tension rod 10；Then, bolt-nut 12 is tightened in the end of tension rod 10, makes itself and centre-hole jack 11
Hold out against；Finally, start the centre-hole jack 11 of both sides, realize the loading of pre- standing wire force value, now parallel steel wire 7 is just in saddle groove
It is interior to produce side force certainly, and measured by the sensing element 4 at the diverse location of array load cell 20, so as to just can obtain lateral
The size and distribution pattern of power, and then provide necessary foundation for the checking of correlation theory achievement.
The embodiment of the present invention is described above in association with accompanying drawing, but these explanations can not be understood to limitation
The scope of the present invention, protection scope of the present invention is limited by appended claims, any in the claims in the present invention base
Change on plinth is all protection scope of the present invention.
Claims (3)
1. a kind of experimental rig for being used to test main push-towing rope side force, it is characterised in that including self-balancing type pedestal (1), stand on certainly
The dynamometry and load maintainer of cable saddle (2) and tested main push-towing rope (8) on balanced type pedestal；Cable saddle (2) is fixed on self-balancing type pedestal
(1) at top center position；Leave for laying array load cell in the centre position of two side walls of cable saddle (2)
(20) vertical neck (3), the size of vertical neck (3) matches with array load cell；
Described array load cell (20) is fixed on orifice plate (6) by some sensing elements (4) and constituted by bolt (5)
Array format, is vertically arranged depending on arrangement height of the number of plies foundation parallel steel wire (7) in cable saddle (2), and sensing element (4) is directly
Contact to measure the side force of corresponding position with parallel steel wire (7).
2. the experimental rig according to claim 1 for being used to test main push-towing rope side force, it is characterised in that described loading dress
Put including tension rod (10), centre-hole jack (11) and bolt-nut (12)；Tension rod (10) passes through centre-hole jack
(11) and with rope boots (9) pin joint at tested main push-towing rope (8) two ends；Bolt-nut (12) is tightened in tension rod (10) end；Positioned at certainly
Centre-hole jack (11) between balanced type pedestal (1) and bolt-nut (12) realizes that Suo Li is loaded, by array dynamometry list
The side force that sensing element (4) the sensing parallel steel wire 7 of first (20) is produced in cable saddle (2).
3. the experimental rig according to claim 1 for being used to test main push-towing rope side force, it is characterised in that the load cell
(20) sensing element (4) in is arranged in longitudinal direction at least arrangement three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710410055.3A CN107101764A (en) | 2017-06-03 | 2017-06-03 | A kind of experimental rig for being used to test main push-towing rope side force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710410055.3A CN107101764A (en) | 2017-06-03 | 2017-06-03 | A kind of experimental rig for being used to test main push-towing rope side force |
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| Publication Number | Publication Date |
|---|---|
| CN107101764A true CN107101764A (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710410055.3A Pending CN107101764A (en) | 2017-06-03 | 2017-06-03 | A kind of experimental rig for being used to test main push-towing rope side force |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323187A (en) * | 2020-03-19 | 2020-06-23 | 中国矿业大学 | Device and method for monitoring dynamic contact state of main cable and main cable saddle of suspension bridge |
| CN111829945A (en) * | 2020-06-08 | 2020-10-27 | 德阳天元重工股份有限公司 | Anti-sliding behavior and mechanical characteristic test assembly and test method between main cable and saddle |
| CN111855169A (en) * | 2020-06-12 | 2020-10-30 | 德阳天元重工股份有限公司 | Suspension bridge AS method main cable strand boot anchoring test assembly and test method thereof |
| CN113076611A (en) * | 2021-04-09 | 2021-07-06 | 西南交通大学 | Stress redistribution evaluation method for cable body component in fire state and application thereof |
| CN114108463A (en) * | 2021-12-08 | 2022-03-01 | 湖北省交通规划设计院股份有限公司 | Suspension bridge cable tower stress state active control system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323187A (en) * | 2020-03-19 | 2020-06-23 | 中国矿业大学 | Device and method for monitoring dynamic contact state of main cable and main cable saddle of suspension bridge |
| CN111829945A (en) * | 2020-06-08 | 2020-10-27 | 德阳天元重工股份有限公司 | Anti-sliding behavior and mechanical characteristic test assembly and test method between main cable and saddle |
| CN111855169A (en) * | 2020-06-12 | 2020-10-30 | 德阳天元重工股份有限公司 | Suspension bridge AS method main cable strand boot anchoring test assembly and test method thereof |
| CN113076611A (en) * | 2021-04-09 | 2021-07-06 | 西南交通大学 | Stress redistribution evaluation method for cable body component in fire state and application thereof |
| CN113076611B (en) * | 2021-04-09 | 2022-07-05 | 西南交通大学 | Stress redistribution evaluation method for cable body component in fire state and application thereof |
| CN114108463A (en) * | 2021-12-08 | 2022-03-01 | 湖北省交通规划设计院股份有限公司 | Suspension bridge cable tower stress state active control system |
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Application publication date: 20170829 |