CN109487690A - A kind of cable of the anti-skid cord clip of band pin joint rope clip pair and antiskid calculation method - Google Patents
A kind of cable of the anti-skid cord clip of band pin joint rope clip pair and antiskid calculation method Download PDFInfo
- Publication number
- CN109487690A CN109487690A CN201811187714.2A CN201811187714A CN109487690A CN 109487690 A CN109487690 A CN 109487690A CN 201811187714 A CN201811187714 A CN 201811187714A CN 109487690 A CN109487690 A CN 109487690A
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- China
- Prior art keywords
- cable
- cord clip
- skid
- rope
- holder body
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
Abstract
The invention discloses a kind of cable of the anti-skid cord clip of band pin joint rope clip pairs and antiskid calculation method.Cord clip pair includes pin joint type main rope folder and anti-skid secondary cord clip；The pin joint type main rope folder includes the hoist cable Rope holder body that one piece of upper half Rope holder body and one piece have otic placode, the connecting portion of upper half Rope holder body and hoist cable Rope holder body is provided with after mutually matched chimeric tongue and groove, upper half Rope holder body and hoist cable Rope holder body are fitted into tongue and groove and is connected using bolt pair；The anti-skid secondary cord clip includes half Rope holder body of two pieces of pairings, is connected after two and half Rope holder body pairings using bolt pair；In the sliding side that pin joint type main rope presss from both sides, end face fits closely the anti-skid secondary installing Cable-clamp with pin joint type main rope folder end face.The cable pin joint rope clip pair of the anti-skid cord clip of band provided by the invention can increase the resistant slide reliability that cord clip is connect with cable.The skid resistance calculation method of cord clip pair, it is contemplated that hoist cable power weakens the influence to cord clip skid resistance, and calculated result is more acurrate.
Description
Technical field
The invention belongs to bridge suspension cables, the prestressed cable fixture design field of building prestressing force string branch structure, specifically
For the cable pin joint rope clip pair and antiskid calculation method of a kind of anti-skid cord clip of band.
Background technique
Bridge suspension cable, the prestressed cable for building prestressing force string branch structure are needed by the fixture specially designed in local position
It sets and is fastened, while fixture also needs reliably to be connect with Force transmission parts hoist cable, to guarantee stable structure.Pin joint type rope
Folder is saved casting cost and is widely used, be detailed in " Cable because moulding is simple, good to the applicability that cable is linear
Supported bridges concept and design " (this pungent work of J. Jim of Neil).But traditional pin joint rope clip,
Under the pulling force effect of the hoist cable or prestressed cable that are connected with cord clip, the hoist cable Rope holder body of direct tension can occur mutually to strain
Shape leads to the trend come to nothing relative to the suspension cable or prestressed cable surface that are tightened, reduces cord clip fastening force, and then reduce
The friction resistance to sliding power of cord clip to cord clip and is tightened being reliably connected between cable member and adversely affects, and it is sliding to increase cord clip
Move risk.It is detailed in paper " the cord clip antiskid limit frictional resistance analysis based on multiple dimensioned model " (" bridge construction " 2016 the 5th
Phase), " vertically tightening bolts type cable parrel mechanical characteristic and design criteria research " (" bridge construction " the 2nd phase in 2008).Mesh
There is the Case Report common occurrence of hoist cable cord clip sliding in suspension bridge in preceding operation, and skidding distance can reach 30mm, give structure
Safety belt carrys out hidden danger, is detailed in " modern bridge maintenance and management " (Chen Weizhen etc. writes).This engineering problem is urgently resolved.
Summary of the invention
It is an object of the invention to solve under hoist cable pulling force effect, cable is with pin joint type fixture because friction resistance to sliding power reduces
And the problem of sliding.
Realize that the technical solution of the object of the invention is as follows:
A kind of cable pin joint rope clip pair of the anti-skid cord clip of band, including pin joint type main rope folder and anti-skid secondary cord clip；It is described
Pin joint type main rope folder includes the hoist cable Rope holder body that one piece of upper half Rope holder body and one piece have otic placode, upper half Rope holder body and hoist cable cord clip
The connecting portion of body be provided with mutually matched chimeric tongue and groove, upper half Rope holder body and hoist cable Rope holder body and tongue and groove it is chimeric after use spiral shell
The connection of bolt pair；The anti-skid secondary cord clip includes half Rope holder body of two pieces of pairings, is connected after two and half Rope holder body pairings using bolt pair
It connects；In the sliding side that pin joint type main rope presss from both sides, end face fits closely the anti-skid secondary installing Cable-clamp with pin joint type main rope folder end face.
The antiskid calculation method of above-mentioned cord clip pair, skid resistance F are calculated using the following equation:
F=μa[(kl)main+(kl)vice] (1)
Wherein, μaFor cord clip hole wall and the nominal coefficient of friction resistance of the cable surface along cable axial direction, (kl)mainExist for main cord clip
To the fastening pressure of cable, (kl) when prestressed high-strength bolt clipping forcee and hoist cable power collective effectviceIt is pre- at its for secondary cord clip
To the fastening pressure of cable when stress high-strength bolt fastening force acts on, circular is as follows:
Wherein,For the total stretching force of the prestressed high-strength bolt installed on main cord clip,To pacify on anti-skid secondary cord clip
The total stretching force of the prestressed high-strength bolt of dress, μθFor cord clip hole wall with cable surface along the nominal frictional resistance system of cable surface circumferential direction
Number, T are hoist cable power,The mounted angle for being cord clip on cable.
The skid resistance calculation method of cord clip pair is based on Coulomb friction principle, referring to formula (1), it is characterized in that: main rope folder pair
Cable fastening force is codetermined by bolt power and hoist cable power, and anti-skid pair cord clip is only determined cable fastening force by bolt power, referring to
Formula (2)；Cord clip is significant by occurring after prestressed high-strength bolt fastening, between cord clip internal surface of hole and cable steel wire on cable
Extruding scuffing, parallel streak-like recess is presented in cord clip inner surface, and the coefficient of friction resistance that cord clip is contacted with cable surface exists
It is circumferential and axially distinct, to the coefficient of friction resistance of both direction using not same amount in formula, referring to formula (2).
The cable pin joint rope clip pair of the anti-skid cord clip of band provided by the invention, can increase that cord clip connect with cable is anti-
Slide reliability, principle is: when main rope folder because antiskid bearing capacity reduce or hoist cable sliding force increase cause main rope folder generate to
When cable downstream slides trend, it will receive the blocking of anti-skid secondary cord clip and stop sliding trend, to continue to guarantee and cable
It is reliably connected, the antiskid bearing capacity of anti-skid pair cord clip has good antiskid performance because not influenced by hoist cable power.The present invention provides
The skid resistance calculation method for the type cord clip pair, it is contemplated that hoist cable power weakens the influence to cord clip skid resistance, relative to
Do not consider that the pin joint rope clip skid resistance calculation method that hoist cable power influences, calculated result are more acurrate in existing industry standard.
Detailed description of the invention
Fig. 1 is the secondary three-dimensional diagram of the pin joint type cable cord clip with anti-skid cord clip；
Fig. 2 is the side view of cord clip pair；
In figure: 1- main rope folder, 2- anti-skid secondary cord clip, 3- prestressed high-strength bolt pair, 4- cord clip center,Installing Cable-clamp
Inclination angle.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The basic idea of the invention is that: in the anti-skid secondary rope that the sliding side installation of pin joint type main rope folder is bonded with its end face
Folder, when main rope folder because fastening force reduce or hoist cable power increase there is sliding trend when, secondary cord clip it is provided a supporting role so that
Sliding will not occur, and be reliably connected between cord clip and cable to ensure, because not influenced by hoist cable power, its own has secondary cord clip
Good anti-skid performance.It is based on Coulomb friction law for the skid resistance calculation method of the type cord clip pair, considers hoist cable power pair
Skid resistance weakens the influence, and more existing industry standard calculates pin joint rope clip skid resistance the way for ignoring the influence of hoist cable power, energy
Access more accurate result.
Referring to Fig. 1, the pin joint rope clip pair of the cable with anti-skid cord clip, including pin joint type main rope folder, anti-skid secondary cord clip and
Prestressed high-strength bolt pair.Main rope folder includes the clamp of two pieces of pairings, and the otic placode with pin hole is arranged in the side acted on by hoist cable power,
To install anti-skid secondary cord clip in main rope folder sliding side with hoist cable pin joint, end face is bonded with main rope folder end face, major and minor cord clip
Pairing clamp is all made of the connection of prestressed high-strength bolt pair, is anchored on cable.
The skid resistance of cord clip pair calculates, and is based on Coulomb friction law, and considers that hoist cable power influences.Formulation process is such as
Under:
The first step, does not consider that hoist cable power influences, only analyzes under bolt power effect, fastening pressure of the cord clip to cable.By rope
Folder micro unit balance between cord clip and cable, radial pressure q (θ) be expressed as
Wherein, μθFor cord clip hole wall with cable surface along the nominal coefficient of friction resistance of cable surface circumferential direction, by q (θ) along cord clip
Inner wall circulation integral obtains, and cord clip is to cable radial pressure summation (kl)
Wherein Ptot=2P is the summation of whole bolt clipping forcees；
Second step, only considers the effect of hoist cable power, and analysis hoist cable power acts on lower radial pressure between cord clip and cable and changes
It measures Δ q (θ), lower half cord clip is obtained by lower half cord clip (Rope holder body with otic placode) micro unit stress balance and cable radial pressure reduces
Amount is expressed as
It is obtained by lower half cord clip entirety force balance state
Wherein, Δ P is additional bolts pulling force caused by hoist cable power acts on, and T is hoist cable power,For installing Cable-clamp inclination angle, referring to
Fig. 2；
Third step analyzes cord clip under bolt power, hoist cable power collective effect to the radial direction on cable surface using principle of stacking
Pressure, upper half cord clip (with the Rope holder body with otic placode cord clip pairing) is to the radial pressure q of cableu(θ) is
Radial pressure q of the lower half cord clip to cablel(θ) is
By upper half cord clip, lower half cord clip, along its, respectively circumference range is integrated respectively, and is summed, obtain cord clip bolt power,
To total radial pressure on cable surface under hoist cable power collective effect
4th step, for cord clip pair disclosed by the invention, main rope is pressed from both sides to the fastening pressure of cable by hoist cable power and bolt
Power joint effect is calculated and is calculated by formula in step 3, obtains
Wherein,For the total stretching force of the prestressed high-strength bolt installed on main cord clip；
Secondary cord clip is not connect with hoist cable, is only determined by bolt power to cable surface fastening pressure, by formula in step 1
It calculates, obtains
For the total stretching force of the prestressed high-strength bolt installed on anti-skid secondary cord clip；
5th step, for cord clip pair disclosed by the invention, skid resistance F is calculated according to Coulomb friction law, and expression formula is
F=μa[(kl)main+(kl)vice]
Wherein, μaFor cord clip hole wall with cable surface along the nominal coefficient of friction resistance of cable axial direction.
Claims (2)
1. a kind of cable pin joint rope clip pair of the anti-skid cord clip of band, which is characterized in that including pin joint type main rope folder and anti-skid pair
Cord clip；The pin joint type main rope folder includes the hoist cable Rope holder body that one piece of upper half Rope holder body and one piece have otic placode, upper half Rope holder body
The connecting portion of hoist cable Rope holder body is provided with mutually matched chimeric tongue and groove, upper half Rope holder body and hoist cable Rope holder body and tongue and groove is embedding
It is connected after conjunction using bolt pair；The anti-skid secondary cord clip includes half Rope holder body of two pieces of pairings, is made after two and half Rope holder body pairings
It is connected with bolt pair；The anti-skid secondary installing Cable-clamp presss from both sides end in the sliding side that pin joint type main rope presss from both sides, end face and pin joint type main rope
Face fits closely.
2. a kind of antiskid calculation method of the cable pin joint rope clip pair of the anti-skid cord clip of band as described in claim 1, special
Sign is that skid resistance F is calculated using the following equation:
F=μa[(kl)main+(kl)vice] (1)
Wherein, μaFor cord clip hole wall and the nominal coefficient of friction resistance of the cable surface along cable axial direction, (kl)mainIt is being answered in advance for main cord clip
To the fastening pressure of cable, (kl) when power high-strength bolt fastening force and hoist cable power collective effectviceIt is secondary cord clip in its prestressing force
To the fastening pressure of cable when high-strength bolt fastening force acts on, circular is as follows:
Wherein,For the total stretching force of the prestressed high-strength bolt installed on main cord clip,It is installed on anti-skid pair cord clip
The total stretching force of prestressed high-strength bolt, μθFor cord clip hole wall and the nominal coefficient of friction resistance of the cable surface along cable surface circumferential direction, T
For hoist cable power,The mounted angle for being cord clip on cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187714.2A CN109487690B (en) | 2018-10-12 | 2018-10-12 | A kind of antiskid calculation method of the cable pin joint rope clip pair of the anti-skid cord clip of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187714.2A CN109487690B (en) | 2018-10-12 | 2018-10-12 | A kind of antiskid calculation method of the cable pin joint rope clip pair of the anti-skid cord clip of band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109487690A true CN109487690A (en) | 2019-03-19 |
| CN109487690B CN109487690B (en) | 2019-10-01 |
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ID=65689752
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811187714.2A Expired - Fee Related CN109487690B (en) | 2018-10-12 | 2018-10-12 | A kind of antiskid calculation method of the cable pin joint rope clip pair of the anti-skid cord clip of band |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158476A (en) * | 2019-05-22 | 2019-08-23 | 中铁大桥科学研究院有限公司 | A kind of method for stretching for cord clip of suspension bridge screw rod |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3737710A1 (en) * | 1987-11-06 | 1989-05-18 | Pfeifer Seil Hebetech | Clamp for twisted parallel wire bundles |
| CN203080413U (en) * | 2013-02-04 | 2013-07-24 | 中建八局大连建设工程有限公司 | Anti-sliding cable clip |
| CN203174504U (en) * | 2013-02-02 | 2013-09-04 | 四川天元机械工程股份有限公司 | Anti-slip cord clip for suspension bridge |
| CN204151681U (en) * | 2014-10-22 | 2015-02-11 | 德阳天元重工有限公司 | Suspension bridge pin joint formula cord clip |
| CN206289545U (en) * | 2016-12-23 | 2017-06-30 | 大连理工大学 | A kind of cord clip friction skidding device |
-
2018
- 2018-10-12 CN CN201811187714.2A patent/CN109487690B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3737710A1 (en) * | 1987-11-06 | 1989-05-18 | Pfeifer Seil Hebetech | Clamp for twisted parallel wire bundles |
| CN203174504U (en) * | 2013-02-02 | 2013-09-04 | 四川天元机械工程股份有限公司 | Anti-slip cord clip for suspension bridge |
| CN203080413U (en) * | 2013-02-04 | 2013-07-24 | 中建八局大连建设工程有限公司 | Anti-sliding cable clip |
| CN204151681U (en) * | 2014-10-22 | 2015-02-11 | 德阳天元重工有限公司 | Suspension bridge pin joint formula cord clip |
| CN206289545U (en) * | 2016-12-23 | 2017-06-30 | 大连理工大学 | A kind of cord clip friction skidding device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158476A (en) * | 2019-05-22 | 2019-08-23 | 中铁大桥科学研究院有限公司 | A kind of method for stretching for cord clip of suspension bridge screw rod |
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| CN109487690B (en) | 2019-10-01 |
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