CN111424561A - Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge - Google Patents
Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge Download PDFInfo
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- CN111424561A CN111424561A CN202010375447.2A CN202010375447A CN111424561A CN 111424561 A CN111424561 A CN 111424561A CN 202010375447 A CN202010375447 A CN 202010375447A CN 111424561 A CN111424561 A CN 111424561A
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
Abstract
The invention discloses a layered suspension structure of a single-side double-main-cable steel truss stiffening girder suspension bridge. The single-side double main cables are arranged in a mode that one main cable is arranged at the upper part and the other main cable is arranged at the lower part in an unequal height mode, or in a mode that the inner side main cable and the outer side main cable are arranged in parallel in equal height, or in a mode that the inner side main cable and the outer side main cable are arranged in a double-chain mode. The invention can reduce the bridge deck width occupied by the main cable suspension area, thereby reducing the constant load of the stiffening girder and reducing the transverse width of the bridge tower. The layered suspension can also effectively reduce the problem that the suspension point force is too concentrated on the upper (or lower) layer node. The lengths of the slings at the inner side and the outer side are different, so that the slings can be prevented from resonating at the same frequency. The heights of the inner main cable and the outer main cable are different, so that the vibration of the cables caused by wake flow can be avoided. The double main cables can also reduce the S-shaped deflection of the stiffening beam if arranged in a double-chain form.
Description
Technical Field
The invention relates to the technical field of suspension bridge structures, in particular to a layered suspension structure of a single-side double-main-cable steel truss stiffening girder suspension bridge.
Background
The suspension bridge has beautiful shape and strong spanning capability, and is one of the preferred structural forms of the large-span bridge. At present, 26 suspension bridges (including a highway-railway dual-purpose bridge) with span of more than 1000m are built and currently built in China, wherein the Sihong bridge has the span of 1700m and is the suspension bridge with the largest span in China. The suspension bridge with the largest span in the world is the Japanese Mingshi strait bridge, and the span of the suspension bridge reaches 1991 m. With the increasing maturity of technologies such as large-span suspension bridge design and construction and the urgent engineering requirements of river-crossing and sea-crossing bridges on super-large-span bridge structures, the span of the suspension bridge is expected to break through 3000m in the future. The main cable is used as a main bearing component of the large-span suspension bridge and plays the role of constant load and live load transmitted from the stiffening beam, so the bearing capacity of the main cable directly restricts the further development of the span of the suspension bridge.
The large-span suspension bridge built at home and abroad mostly adopts a cable system that a transverse bridge arranges a main cable to one side, and the transverse bridge arranges a single main cable to one side, so the bearing capacity of the main cable is generally improved by increasing the section diameter of the main cable, improving the strength grade of high-strength steel wires of the main cable and the like, therefore, for the suspension bridge with larger span, the diameter of the main cable is often designed to be very large, for example, the diameter of the main cable of the Japanese Mingli Haichang bridge reaches 1.12m, the larger the diameter, the larger the cable clip connected with the main cable is, the difficulty of skid resistance of a tight cable and the cable clip is greatly increased, so the scheme of realizing the span break-through of the large-span suspension bridge by increasing the diameter of the main cable in the future can be changed into the mode of arranging more than one main cable to one side, the transverse bridge arranges two main cables to one side of the suspension bridge in a mode that two main cable trusses are arranged in parallel and at the same height, and is simultaneously connected with a hanging point on the steel stiffening girder, for example, the American flourishing bridge, the problem of the constant frequency of the suspension cable is caused by the suspension cable, the suspension bridge, the suspension cable system is increased, and the suspension cable is caused by the problem that the vibration of the suspension cable is increased, the suspension bridge deck, the suspension cable system is 3583, and the suspension bridge surface is caused by the suspension cable system, and the suspension cable is increased.
Disclosure of Invention
The invention provides a layered suspension structure of a single-side double-main-cable steel truss stiffening girder suspension bridge, which can be used for single-layer or double-layer bridge deck steel truss stiffening girder suspension bridges needing double main cables.
The technical scheme for realizing the purpose of the invention is as follows:
the utility model provides a two main push-towing rope bridge's of unilateral layering suspension structure of steel truss stiffening girder, the two main push-towing rope of unilateral leans on the inboard main push-towing rope of bridge floor to be connected to the last chord of steel truss stiffening girder through cable clamp and hoist cable, leans on the main push-towing rope of the bridge floor outside to be connected to the bracket that steel truss stiffening girder lower chord stretches out through cable clamp and hoist cable.
Furthermore, the unilateral double main cables are arranged in an unequal height mode that one main cable is arranged above the other main cable.
Furthermore, the single-side double main cables are arranged in parallel and at the same height by adopting the inner main cables and the outer main cables.
Further, the single-side double-main cable is arranged in a double-chain mode through an inner main cable and an outer main cable.
Compared with the prior art, the invention has the beneficial effects that the bridge deck width occupied by the main cable suspension area can be reduced, so that the constant load of the stiffening girder is reduced, and the transverse width of the bridge tower is also reduced. The layered suspension can also effectively reduce the problem that the suspension point force is too concentrated on the upper (or lower) layer node. The lengths of the slings at the inner side and the outer side are different, so that the slings can be prevented from resonating at the same frequency. The heights of the inner main cable and the outer main cable are different, so that the vibration of the cables caused by wake flow can be avoided. The double main cables can also reduce the S-shaped deflection of the stiffening beam if arranged in a double-chain form.
Drawings
FIG. 1 is a schematic diagram of the unequal height arrangement of main cables in a layered suspension structure of a single-side double-main-cable steel truss stiffening girder suspension bridge according to the invention.
FIG. 2 is a schematic diagram of the parallel equal-height arrangement of main cables of a layered suspension structure of a single-side double-main-cable steel truss stiffening beam suspension bridge of the invention.
Fig. 3 is a schematic diagram of the arrangement form of the main cable double chains of the layered suspension structure of the single-side double-main-cable steel truss stiffening beam suspension bridge of the invention.
Fig. 4 is a schematic diagram of the cross-bridge connection between the main cables (arranged at unequal heights) and the steel truss stiffening girder of the layered suspension structure of the single-side double-main-cable steel truss stiffening girder suspension bridge of the invention.
FIG. 5 is a schematic diagram of the cross-bridge connection between the main cables (arranged in parallel and equal height) and the steel truss stiffening girder of the layered suspension structure of the single-side double-main-cable steel truss stiffening girder suspension bridge of the invention.
FIG. 6 is a schematic cross-bridge connection of main cables and steel truss stiffeners of a single-side single-main cable suspension bridge structural system.
FIG. 7 is a schematic cross-bridge connection of main cables and steel truss stiffeners of a single-sided double-main cable suspension bridge structure.
In the figure, 1, a main cable, 2, a sling, 3, a main tower, 4, a steel truss stiffening girder, 5, a main cable saddle, 6, an anchoring system, 7, an upper chord, 8, a lower chord, 9, a web member, 10, a bridge deck, 11, an upper chord hoisting point and 12, a lower chord hoisting point.
Detailed Description
As shown in fig. 1 to 5, a single-side double-main-cable steel truss stiffening girder suspension bridge layered suspension structure system, wherein the single-side double-main-cable 1 adopts an unequal-height arrangement form of one main cable above and one main cable below, or adopts a parallel equal-height arrangement form of an inner main cable and an outer main cable, or adopts a double-chain arrangement form of the inner main cable and the outer main cable. The main cables 1 are arranged at one side of the transverse bridge (four on both sides), the main cable 1 close to the inner side of the bridge deck 10 is connected with the upper chord of the steel truss stiffening beam 4 through a cable clamp and a sling 2, and the main cable 1 close to the outer side is connected with the bracket extending out of the lower chord of the steel truss stiffening beam 4 through the cable clamp and the sling 2.
As shown in fig. 6 and 7, in the currently used single-side single-main-cable suspension bridge structural system and the existing single-side double-main-cable suspension bridge structural system, the connection modes of the main cable 1 and the steel truss stiffening girder 4 are as follows: the main cable 1 is connected with an upper chord hoisting point 11 on the steel truss stiffening beam 4 through a sling 2. The current single-layer suspension mode has the following problems: the width of the bridge deck occupied by the main cable and the width of the bridge tower are increased, the dead load of the stiffening beam is increased, the sling force is large, the lifting point force is too concentrated, and the cable vibration caused by the same-frequency resonance or wake flow of the sling is easy to cause. As shown in fig. 2, a suspension bridge layered suspension structure system with single-side double main cables and steel truss stiffening beams has technical innovation in the suspension mode of the main cables 1 and the steel truss stiffening beams 4, and the traditional single-layer suspension structure system is changed into a layered suspension structure system, so that the width of the bridge deck occupied by the main cables and the transverse width of a bridge tower can be reduced, and the constant load of the stiffening beams can be reduced; meanwhile, the layered suspension can also effectively reduce the problem that the lifting point force is too concentrated on the upper (or lower) layer node; the lengths of the slings at the inner side and the outer side are different, so that the slings can be prevented from resonating at the same frequency; the heights of the inner main cable and the outer main cable are different, so that the vibration of the cables caused by wake flow can be avoided.
The invention designs a structure system for layered suspension of a single-side double-main-cable steel truss stiffening girder suspension bridge, which can be used for single-layer or double-layer bridge deck steel truss stiffening girder suspension bridges needing double main cables.
Claims (4)
1. The layered suspension structure of the single-side double-main-cable steel truss stiffening beam suspension bridge is characterized in that main cables close to the inner side of a bridge floor are connected to an upper chord of the steel truss stiffening beam through cable clamps and suspension cables, and main cables close to the outer side of the bridge floor are connected to brackets extending out of a lower chord of the steel truss stiffening beam through cable clamps and suspension cables.
2. The layered suspension structure of a single-sided double-main-cable steel truss stiffening beam suspension bridge as claimed in claim 1, wherein the single-sided double main cables are arranged in unequal heights with one main cable above and the other main cable below.
3. The layered suspension structure of a single-sided double-main-cable steel truss stiffened beam suspension bridge of claim 1, wherein the single-sided double main cables are arranged with the inner and outer main cables parallel and equal height.
4. The layered suspension structure of a single-sided double-main-cable steel truss stiffened beam suspension bridge of claim 1, wherein said single-sided double main cables are double-stranded arrangement of inner and outer main cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375447.2A CN111424561A (en) | 2020-05-07 | 2020-05-07 | Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375447.2A CN111424561A (en) | 2020-05-07 | 2020-05-07 | Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge |
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| Publication Number | Publication Date |
|---|---|
| CN111424561A true CN111424561A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010375447.2A Pending CN111424561A (en) | 2020-05-07 | 2020-05-07 | Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854012A (en) * | 2021-03-29 | 2021-05-28 | 中交武汉港湾工程设计研究院有限公司 | Cable crane for suspension bridge with four main cables |
| CN113585040A (en) * | 2021-07-07 | 2021-11-02 | 中交第二公路勘察设计研究院有限公司 | Suspension bridge with four main cables with different vertical span ratios |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6301736B1 (en) * | 2000-04-20 | 2001-10-16 | Ernst G. Knolle | Elevated suspended guideway |
| CN104195946A (en) * | 2014-07-04 | 2014-12-10 | 林同棪国际工程咨询（中国）有限公司 | Staged implementation method of multi-bridge-floor-layer suspension bridge for highway and rail |
| CN205711750U (en) * | 2016-06-21 | 2016-11-23 | 罗应建 | Double-strand height rope suspension bridge |
| CN107476181A (en) * | 2017-08-30 | 2017-12-15 | 中铁大桥勘测设计院集团有限公司 | Cable-stayed bridge and its construction method are anchored outside a kind of combined purlin |
| CN108625289A (en) * | 2018-04-24 | 2018-10-09 | 中铁大桥勘测设计院集团有限公司 | A kind of stringer and erection method suitable for stiffening girder of suspension bridge |
-
2020
- 2020-05-07 CN CN202010375447.2A patent/CN111424561A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6301736B1 (en) * | 2000-04-20 | 2001-10-16 | Ernst G. Knolle | Elevated suspended guideway |
| CN104195946A (en) * | 2014-07-04 | 2014-12-10 | 林同棪国际工程咨询（中国）有限公司 | Staged implementation method of multi-bridge-floor-layer suspension bridge for highway and rail |
| CN205711750U (en) * | 2016-06-21 | 2016-11-23 | 罗应建 | Double-strand height rope suspension bridge |
| CN107476181A (en) * | 2017-08-30 | 2017-12-15 | 中铁大桥勘测设计院集团有限公司 | Cable-stayed bridge and its construction method are anchored outside a kind of combined purlin |
| CN108625289A (en) * | 2018-04-24 | 2018-10-09 | 中铁大桥勘测设计院集团有限公司 | A kind of stringer and erection method suitable for stiffening girder of suspension bridge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854012A (en) * | 2021-03-29 | 2021-05-28 | 中交武汉港湾工程设计研究院有限公司 | Cable crane for suspension bridge with four main cables |
| CN113585040A (en) * | 2021-07-07 | 2021-11-02 | 中交第二公路勘察设计研究院有限公司 | Suspension bridge with four main cables with different vertical span ratios |
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Application publication date: 20200717 |
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