CN113585070A - Ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand - Google Patents
Ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand Download PDFInfo
- Publication number
- CN113585070A CN113585070A CN202010366461.6A CN202010366461A CN113585070A CN 113585070 A CN113585070 A CN 113585070A CN 202010366461 A CN202010366461 A CN 202010366461A CN 113585070 A CN113585070 A CN 113585070A
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- Prior art keywords
- anchor cup
- zinc
- wire
- aluminum
- strand
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- -1 zinc-aluminum-magnesium Chemical compound 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 title claims abstract description 22
- 239000000725 suspension Substances 0.000 title claims abstract description 19
- 239000011248 coating agent Substances 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 67
- 239000010959 steel Substances 0.000 claims abstract description 67
- 238000004873 anchoring Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims description 22
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 14
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 239000011701 zinc Substances 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the field of suspension bridges, in particular to a main cable strand of a suspension bridge with an ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating. The utility model provides an ultrahigh strength zinc-aluminum magnesium coating suspension bridge main push-towing rope strand of nai fatigue, includes steel wire bundle (1), and steel wire bundle (1) is laminated mutually outside by 7 at least steel wires (11) and is restrainted the cluster and constitute characterized by: the cable strand is characterized by further comprising anchor cups (2), a wire separating plate (3), a cover plate (4) and anchoring materials (5), wherein the two ends of the cable strand (1) are respectively provided with one anchor cup (2), and the middle parts of the anchor cups (2) are provided with through anchor cup holes (21); the outer bottom surface of the wire separating plate (3) is a spherical crown surface; two ends of the steel wire bundle (1) are respectively scattered into an anchor cup (2), and then the outer end of the steel wire (11) is pressed to form a heading (12); the outer end face of the anchor cup (2) is sealed by a cover plate (4), and an anchoring material (5) is cast in the anchor cup (2) to fixedly integrate the steel wire (11) and the anchor cup (2). The invention has the advantages of uniform stress and high strength.
Description
Technical Field
The invention relates to the field of suspension bridges, in particular to a main cable strand of a suspension bridge with an ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating.
Background
At present, the strength of steel wires adopted by main cable strands of a suspension bridge is generally below 2,000MPa, and with the maturity of steel wire technologies above 2,000MPa, the main cable strands with the strength above 2000MPa inevitably appear in order to improve the tensile strength, but the anchoring force of the currently adopted zinc-copper alloy hot-cast anchor anchorage is difficult to meet the requirement of high strength, so that the application of high-strength steel wires and strands is limited, and the bearing capacity and the service life of the bridge are also reduced.
At present, a steel wire coating for a bridge cable is mainly galvanized, in recent years, part of bridges begin to use steel wires with zinc-aluminum coatings, and the corrosion resistance of the steel wires with the zinc-aluminum coatings on the surface is 2-4 times that of galvanized steel wires. With the recent technical development, steel wires for cables with zinc-aluminum-magnesium coatings begin to appear, and the corrosion resistance of steel wires with zinc-aluminum-magnesium coatings on the surfaces is researched to be more than 3 times that of the steel wires with zinc-aluminum coatings. In order to greatly improve the service life and safety of the cable bridge, it is necessary to adopt a zinc-aluminum-magnesium plated steel wire in the bridge cable.
However, both the zinc-aluminum coated steel wire and the zinc-aluminum-magnesium coated steel wire have a friction coefficient slightly lower than that of the zinc-coated steel wire, and the low friction has an influence on the anchoring performance of the cable.
It is necessary to take corresponding measures to solve the above problems.
Disclosure of Invention
The invention discloses a main cable strand of a suspension bridge with an ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating, aiming at overcoming the defects of the prior art and providing a strand fitting with uniform stress and high strength.
The invention achieves the purpose by the following technical scheme:
the utility model provides an ultra-high strength is able to bear or endure fatigue zinc-aluminum magnesium coating suspension bridge main push-towing rope strand, includes the strand, and the strand is laminated the winding mutually by 7 steel wires outside at least and is constituted characterized by: also comprises an anchor cup, a wire separating plate, a cover plate and an anchoring material,
two ends of each cable strand are respectively provided with an anchor cup, and the middle part of each anchor cup is provided with a through anchor cup hole;
the outer bottom surface of the wire dividing plate is a spherical crown surface, the wire dividing plate is provided with wire dividing holes with the number equal to that of the strand steel wires, the central axis of each wire dividing hole is respectively superposed with one radius of the spherical surface of the wire dividing plate, the wire dividing plate is embedded and fixed in the anchor cup hole, the spherical crown surface of the wire dividing plate faces the outer end surface of the anchor cup hole, the tangent plane at the top end of the spherical crown surface of the wire dividing plate is vertical to the central axis of the anchor cup hole, and the distance from the top point of the spherical crown surface of the wire dividing plate to the inner end surface of the anchor cup hole is equal to the radius of the spherical surface of the wire dividing plate;
two ends of each strand are respectively scattered into one anchor cup, when the strands are scattered, one end of each strand is scattered into each radial steel wire, the outer end of each steel wire penetrates through the inner end surface of the anchor cup hole and then penetrates out of one wire dividing hole of the wire dividing plate, the outer end of each steel wire is pressed into an upset head, and the upset head is attached to the spherical crown surface of the wire dividing plate;
the outer end face of the anchor cup is sealed by a cover plate, and anchoring materials are cast in the anchor cup to fixedly integrate the steel wire and the anchor cup.
The ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand is characterized in that: the anchor cup hole is in a circular truncated cone shape, the large circular bottom surface of the anchor cup hole is an outer end surface, the small circular bottom surface of the anchor cup hole is an inner end surface, the radius of the small circular bottom surface of the anchor cup hole is a, the radius of the large circular bottom surface of the anchor cup hole is 2 a-5 a, the hole depth of the anchor cup hole is 10 a-15 a, and circular arc transition is arranged between the small circular bottom surface of the anchor cup hole and the inner end surface of the anchor cup;
the anchoring material is made of zinc-copper alloy.
The ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand is characterized in that: the minimum part of the thickness of the filament separating plate is not less than 25 mm.
The ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand is characterized in that: an anti-corrosion layer is plated on the outer side surface of the steel wire, the anti-corrosion layer is any one of a zinc layer, a zinc-aluminum alloy layer and a zinc-aluminum-magnesium alloy layer, and the thickness of the anti-corrosion layer is not less than 45 mu m;
the diameter of the upset head is not less than 1.5 times the diameter of the steel wire.
When the anchor cup is used, the two anchor cups are respectively fixed on a bridge, and the cable strand plays a role in bearing load.
The outer ends of all the steel wires are provided with the upset heads, so that an anchoring measure can be added, and the anchoring performance between the steel wires and the anchoring material is improved. The outer surface of the steel wire is plated with the anti-corrosion layer, so that the anti-corrosion capability can be remarkably improved, the anti-corrosion layer is a zinc layer or a zinc-aluminum alloy layer, the anti-corrosion capability can be improved by 2-4 times, the zinc-aluminum-magnesium alloy layer can be improved by 8-10 times, but the friction coefficient of the zinc-aluminum-magnesium coating is lower than that of the zinc-aluminum layer or the zinc-aluminum layer, and therefore the upset head additionally arranged at the outer end of the steel wire can play a good role in supplementing as a second anchoring force.
The outer side surface of the wire separating plate is a spherical crown surface, the radius of the spherical crown surface is equal to the hole depth of an anchor cup hole serving as an anchoring area, the spherical center of the spherical crown surface is the circle center of a small circular bottom surface of a circular table of the anchor cup hole serving as the starting point of the anchoring area, the diameter of the wire separating plate is equal to the diameter of a large circular bottom surface of the circular table of the anchor cup hole, and the thickness of the wire separating plate is not less than 25 mm. By adopting the anchoring structure, when the steel wires are dispersed in a fan shape in the anchor cup and then are fixed on a spherical crown surface through the upset head, the distance from the wire separating plate to the starting point of the anchoring area, namely the distance from the center of the small circular bottom surface of the anchor cup hole circular table, of each steel wire is consistent, so that the stress of each steel wire is uniform, and the static load performance and the fatigue performance of the cable strand are improved.
The small circular bottom surface of the anchor cup hole and the inner end surface of the anchor cup are provided with circular arc transition. After the steel wires are dispersed in a fan shape in the anchor cup, the bending radian of the steel wires on the outer side is larger, and after the cable strand bears tensile force, the stress of the steel wires is concentrated at the starting bending point of the fan-shaped bending, which is not beneficial to the fatigue resistance of the steel wires. The adoption of arc transition can disperse the stress and improve the fatigue resistance of the cable strand.
The invention has the following beneficial effects: the anchor force is big, and bearing capacity is strong, and the static load performance is high, and fatigue resistance can be high.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a front view of the filament separating plate of the present invention;
FIG. 3 is a left side view of the filament separating plate of the present invention;
figure 4 is a schematic view of the upset of the outer end of the wire of the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
The utility model provides an ultrahigh strength zinc-aluminum magnesium coating suspension bridge main push-towing rope strand that resists fatigue, includes strand 1, anchor cup 2, divides filament plate 3, apron 4 and anchor 5, as shown in fig. 1-4, the concrete structure is:
the strand 1 is formed by mutually attaching and winding the outer side surfaces of at least 7 steel wires 11, 51 steel wires 11 are selected and spliced into a regular hexagon cross section in the embodiment, two ends of the strand 1 are respectively provided with an anchor cup 2, and the middle part of the anchor cup 2 is provided with a through anchor cup hole 21;
the wire separating plate 3 is shown in fig. 2 and 3: the outer bottom surface of the wire dividing plate 3 is a spherical crown surface, the wire dividing plate 3 is provided with wire dividing holes 31 with the number equal to that of the steel wires 11 of the cable strand 1, the central axis of each wire dividing hole 31 is respectively superposed with the radius of the spherical surface of the wire dividing plate 3, the wire dividing plate 3 is embedded and fixed in the anchor cup hole 21, the spherical crown surface of the wire dividing plate 3 faces the outer end surface of the anchor cup hole 21, the tangent plane at the top end of the spherical crown surface of the wire dividing plate 3 is vertical to the central axis of the anchor cup hole 21, and the distance from the top point of the spherical crown surface of the wire dividing plate 3 to the inner end surface of the anchor cup hole 21 is equal to the radius of the spherical surface of the wire dividing plate 3;
the two ends of the strand 1 are respectively scattered into an anchor cup 2, when the two ends are scattered, one end of the strand 1 is scattered into the radial steel wires 11, the outer end of each steel wire 11 penetrates through the inner end surface of the anchor cup hole 21 and then penetrates through a wire dividing hole 31 of the wire dividing plate 3, and then as shown in fig. 4: the outer end of the steel wire 11 is pressed into an upset head 12 by an upset head machine, and the upset head 12 is attached to the spherical crown surface of the wire separating plate 3;
the outer end face of the anchor cup 2 is sealed by a cover plate 4, and an anchoring material 5 is cast in the anchor cup 2 so as to fixedly integrate the steel wire 11 and the anchor cup 2.
In this embodiment: the anchor cup hole 21 is in a circular truncated cone shape, the large circular bottom surface of the anchor cup hole 21 is an outer end surface, the small circular bottom surface of the anchor cup hole 21 is an inner end surface, the radius of the small circular bottom surface of the anchor cup hole 21 is a, the radius of the large circular bottom surface of the anchor cup hole 21 is 2 a-5 a, the hole depth of the anchor cup hole 21 is 10 a-15 a, and an arc transition is arranged between the small circular bottom surface of the anchor cup hole 21 and the inner end surface of the anchor cup 2;
the anchoring material 5 is made of zinc-copper alloy.
In this embodiment: the minimum part of the thickness of the wire separating plate 3 is not less than 25 mm.
In this embodiment: an anti-corrosion layer is plated on the outer side surface of the steel wire 11, the anti-corrosion layer is any one of a zinc layer, a zinc-aluminum alloy layer and a zinc-aluminum-magnesium alloy layer, and the thickness of the anti-corrosion layer is not less than 45 micrometers;
the diameter of the upset 12 is no less than 1.5 times the diameter of the wire 11.
When the anchor cup is used, the two anchor cups 2 are respectively fixed on a bridge, and the cable strand 1 plays a role in bearing load.
In the embodiment, the outer ends of all the steel wires 11 are provided with the upset heads 12, so that an anchoring measure can be added, and the anchoring performance between the steel wires 11 and the anchoring material 5 is improved. The outer surface of the steel wire 11 is plated with the anti-corrosion layer, so that the anti-corrosion capability can be remarkably improved, the anti-corrosion layer is a zinc layer or a zinc-aluminum alloy layer, the anti-corrosion capability can be improved by 2-4 times, the zinc-aluminum-magnesium alloy layer can be improved by 8-10 times, but the friction coefficient of the zinc-aluminum-magnesium coating is lower than that of the zinc-aluminum coating or the zinc-aluminum coating, and the upset head 12 additionally arranged at the outer end of the steel wire 11 can play a good supplementary role as a second anchoring force.
The outer side surface of the wire separating plate 3 is a spherical crown surface, the radius of the spherical crown surface is equal to the hole depth of an anchor cup hole 21 serving as an anchoring area, the spherical center of the spherical crown surface is the center of a circle of a round bottom surface of the anchor cup hole 21 serving as the starting point of the anchoring area, the diameter of the wire separating plate 3 is equal to the diameter of a round bottom surface of the round table of the anchor cup hole 21, and the thickness of the wire separating plate 3 is not less than 25 mm. By adopting the anchoring structure, when the steel wires 11 are dispersed in a fan shape in the anchor cup 2 and then are fixed on a spherical crown surface through the upsetting 12, the distance from the wire separating plate 3 to the starting point of the anchoring area, namely the distance from the center of the round bottom surface of the round table of the anchor cup hole 21, of each steel wire 11 is consistent, so that the stress of each steel wire 11 is uniform, and the static load performance and the fatigue performance of the cable strand 1 are improved.
In this embodiment, an arc transition is provided between the small circular bottom surface of the anchor cup hole 21 and the inner end surface of the anchor cup 2. After the steel wires 11 are fanned out in the anchor cup 2, the bending radian of the steel wires 11 on the outer side is larger, and after the cable strand 1 bears tensile force, the stress of the steel wires 11 is concentrated at the starting bending point of the fanning bending, which is not beneficial to the fatigue resistance of the steel wires 11. The arc transition can disperse the stress and improve the fatigue resistance of the cable strand 1.
Claims (5)
1. The utility model provides an ultra-high strength is able to bear or endure fatigue zinc-aluminum magnesium coating suspension bridge main push-towing rope strand, includes strand (1), and strand (1) is laminated the winding mutually by 7 steel wires (11) at least outside and is constituted characterized by: also comprises an anchor cup (2), a wire separating plate (3), a cover plate (4) and an anchoring material (5),
two ends of the cable strand (1) are respectively provided with an anchor cup (2), and the middle part of the anchor cup (2) is provided with a through anchor cup hole (21);
the outer bottom surface of the wire dividing plate (3) is a spherical crown surface, the wire dividing plate (3) is provided with wire dividing holes (31) with the number equal to that of the steel wires (11) of the cable strand (1), the central axis of each wire dividing hole (31) is respectively superposed with the radius of the spherical surface of the wire dividing plate (3), the wire dividing plate (3) is embedded and fixed in the anchor cup hole (21), the spherical crown surface of the wire dividing plate (3) faces the outer end surface of the anchor cup hole (21), the tangent plane at the top end of the spherical crown surface of the wire dividing plate (3) is vertical to the central axis of the anchor cup hole (21), and the distance from the top point of the spherical crown surface of the wire dividing plate (3) to the inner end surface of the anchor cup hole (21) is equal to the radius of the spherical surface of the wire dividing plate (3);
two ends of the strand (1) are respectively scattered into an anchor cup (2), when the strand is scattered, one end of the strand (1) is scattered into each radial steel wire (11), the outer end of each steel wire (11) penetrates through the inner end face of an anchor cup hole (21) and then respectively penetrates out of a wire dividing hole (31) of a wire dividing plate (3), then the outer end of each steel wire (11) is pressed into an upset head (12), and the upset heads (12) are attached to the spherical crown face of the wire dividing plate (3);
the outer end face of the anchor cup (2) is sealed by a cover plate (4), and an anchoring material (5) is cast in the anchor cup (2) to fixedly integrate the steel wire (11) and the anchor cup (2).
2. The ultra-high strength fatigue-resistant zinc-aluminum-magnesium-plated suspension bridge main cable strand as claimed in claim 1, wherein: the anchor cup hole (21) is in a circular truncated cone shape, the large circular bottom surface of the anchor cup hole (21) is an outer end surface, the small circular bottom surface of the anchor cup hole (21) is an inner end surface, the radius of the small circular bottom surface of the anchor cup hole (21) is a, the radius of the large circular bottom surface of the anchor cup hole (21) is 2 a-5 a, the depth of the anchor cup hole (21) is 10 a-15 a, and circular arc transition is arranged between the small circular bottom surface of the anchor cup hole (21) and the inner end surface of the anchor cup (2);
the anchoring material (5) is made of zinc-copper alloy.
3. The ultra-high strength fatigue-resistant zinc-aluminum-magnesium-plated suspension bridge main cable strand as claimed in claim 1 or 2, wherein: the minimum part of the thickness of the wire separating plate (3) is not less than 25 mm.
4. The ultra-high strength fatigue-resistant zinc-aluminum-magnesium-plated suspension bridge main cable strand as claimed in claim 1 or 2, wherein: an anti-corrosion layer is plated on the outer side surface of the steel wire (11), the anti-corrosion layer is any one of a zinc layer, a zinc-aluminum alloy layer and a zinc-aluminum-magnesium alloy layer, and the thickness of the anti-corrosion layer is not less than 45 mu m;
the diameter of the upset head (12) is not less than 1.5 times the diameter of the steel wire (11).
5. The ultra-high strength fatigue-resistant zinc-aluminum-magnesium coated suspension bridge main cable strand of claim 3, which is characterized in that: an anti-corrosion layer is plated on the outer side surface of the steel wire (11), the anti-corrosion layer is any one of a zinc layer, a zinc-aluminum alloy layer and a zinc-aluminum-magnesium alloy layer, and the thickness of the anti-corrosion layer is not less than 45 mu m;
the diameter of the upset head (12) is not less than 1.5 times the diameter of the steel wire (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010366461.6A CN113585070A (en) | 2020-04-30 | 2020-04-30 | Ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010366461.6A CN113585070A (en) | 2020-04-30 | 2020-04-30 | Ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand |
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| Publication Number | Publication Date |
|---|---|
| CN113585070A true CN113585070A (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010366461.6A Pending CN113585070A (en) | 2020-04-30 | 2020-04-30 | Ultrahigh-strength fatigue-resistant zinc-aluminum-magnesium coating suspension bridge main cable strand |
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Application publication date: 20211102 |