CN2583190Y - Chain support bridge structure - Google Patents
Chain support bridge structure Download PDFInfo
- Publication number
- CN2583190Y CN2583190Y CN 02289587 CN02289587U CN2583190Y CN 2583190 Y CN2583190 Y CN 2583190Y CN 02289587 CN02289587 CN 02289587 CN 02289587 U CN02289587 U CN 02289587U CN 2583190 Y CN2583190 Y CN 2583190Y
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- Prior art keywords
- cable
- bridge
- king
- tower
- flexible cable
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Abstract
The utility model relates to a cable supporting bridge structure which comprises a king tower, a bridge floor system and flexible cables, wherein, the flexible cables are tensioned on the king tower and penetrate from the lower parts of nodes on both sides of two symmetrical beam structures which take the center of a bridge floor of the bridge floor system as the symmetry axis, and the flexible bracing cables are made to play a supporting role to a main beam of the bridge floor system; both ends of the flexible cables are anchored. The cable supporting bridge structure has the advantages of low king tower, large rigidity and few anchor heads, and the utility model solves the problems of the existing cable-stayed bridge structure and the existing suspension bridge structure.
Description
Technical field
The utility model belongs to a kind of bridge construction.
Background technology
Suspension bridge and cable stayed bridge are two kinds of typical form of structure in the long-span bridge girder construction, and its common characteristic is that span is big, and cost is low, and construction fast.But these two kinds of bridges all respectively have shortcoming: the angle α of the oblique cord of cable stayed bridge and bridge floor must be greater than 23 °, the pass of its king-tower height and span is h 〉=1/41, otherwise the efficient of rope is too low, so when the span of this bridge is big, its king-tower height is higher, has increased difficulty of construction and cost; Anchor head is more, and cost is increased; In addition, as shown in Figure 1, in the bridge middle part, oblique cord component in the horizontal direction is bigger, and the component of in the vertical direction is less, in the time of will carrying big load like this at bridge middle part not only king-tower be subjected to big pulling force, and the bridge deck part also is subjected to two opposite pulling force on the horizontal direction, make the bearing capacity step-down of bridge, also can produce immense pressure at the slant-pull structure root.
In the suspension bridge structure, because its main rope is a flexible cable, not to be fixed on the king-tower, the main rope two ends are lived by the earth anchor grappling, so its rigidity of structure is little, wind resisting stability is poor; Under the non-symmetrical load effect, vertical relative displacement can take place in main push-towing rope and stiff girder, and produces moderate finite deformation; The floor system deadweight and the suffered load of bridge floor of bridge all will act on above the earth anchor by main rope, so not only the requirement of strength of main rope is higher, and has huge earth anchor at the bridge two ends, have increased difficulty of construction and cost.
The utility model content
At the problems referred to above of present cable stayed bridge and suspension bridge existence, the purpose of this utility model is to provide a kind of cable supporting bridge girder construction, has merged the advantage of cable stayed bridge and suspension bridge, has solved the problems referred to above that cable stayed bridge and suspension bridge exist preferably.
The cable supporting bridge girder construction that the utility model provides comprises king-tower, floor system, a plurality of flexible cable.Each flexible cable stretch-draw is on king-tower, and the flexible cable between two king-towers is to run through in the past under the node of girder construction both sides of two symmetries of axis of symmetry with the bridge floor center from floor system, and the girder in the floor system is held, and the flexible cable two ends are lived by anchoring.
Cable saddle can be arranged at above-mentioned king-tower top, and flexible cable can stride across cable saddle and be anchored at the neighbour and step up.
Described flexible cable can be anchored on the king-tower.
This cable supporting bridge girder construction because flexible cable is to pass the girder construction of deck system and it is held, has following advantage so compare with cable stayed bridge and suspension bridge:
(1) profile and cable stayed bridge are basic identical, but the stressed difference of bridge construction, the closer to the rope of span centre, big more with the ratio of horizontal reacting force to the vertical counter-force of the constraint of beam, horizontal component is more little, so the efficient of rope is higher.
(2) angle of cut with beam need not to be limited, so tower height can reduce.
(3) because tower height is lower than suspension cable structure, and be a rope, so its rigidity is difficult for producing the anti-destruction of wind greatly.
(4) because flexible cable is to hold deck system, so reduced anchor head quantity.
(5) construction is simplified than cable stayed bridge, can keep vegetarian earlier and be fixed on two ends, and when cantilever construction, front end has had fulcrum.
(6) owing to flexible cable adopts from anchor, need not expensive earth anchor.
Description of drawings
Fig. 1 is the beam body force diagram of cable stayed bridge bridge floor system;
Fig. 2 is the cable supporting bridge girder construction schematic diagram of the utility model embodiment 1;
Fig. 3 is the cable supporting bridge girder construction schematic diagram of the utility model embodiment 2;
Fig. 4 is the beam body force diagram of the deck system of the novel cable supporting bridge girder construction of this usefulness.
The specific embodiment
Below in conjunction with the drawings and specific embodiments cable supporting bridge girder construction of the present utility model is described further.
Embodiment 1
As shown in Figure 2, the cable supporting bridge structure comprises king-tower 1, deck system 2 and flexible cable 3, flexible cable 3 strides across the cable saddle (omitting among the figure) on the king-tower 1, two ends are anchored on the anchor node of deck system 2 both sides, flexible cable 3 between the king-tower passes on the node (omitting among the figure) of the girder construction of deck system 2 both sides, and making the center line with deck system 2 serves as that axisymmetric two the girder construction tie points of symmetry are held by flexible cable 3.
As shown in Figure 4, the cable supporting bridge girder construction bridge floor beam body stressing conditions of this structure is different with cable stayed bridge, can not produce harmful horizontal pull to both sides at the active force near bridge floor center institute rope.
Embodiment 2
As shown in Figure 3, cable supporting bridge girder construction in the present embodiment comprises king-tower 10, deck system 11 and flexible cable 12, flexible cable 12 passes under the anchor node (omitting the figure) on the girder construction both sides of deck system 11, and deck system 11 is held, and flexible cable 12 two ends are anchored on the king-tower 10.
Claims (3)
1, a kind of cable supporting bridge girder construction, comprise king-tower, deck system and flexible cable, it is characterized in that: each flexible cable stretch-draw is on king-tower, flexible cable between two king-towers is to run through the past under the node of girder construction both sides of two symmetries of axis of symmetry corbel is lived with the bridge floor center from floor system, and the anchoring of flexible cable two ends is lived.
2, cable supporting bridge girder construction as claimed in claim 1 is characterized in that: cable saddle is arranged at described king-tower top, and flexible cable strides across the neighbour that cable saddle is anchored at the deck system of king-tower another side and steps up.
3, cable supporting bridge girder construction as claimed in claim 1, it is characterized in that: described flexible cable is anchored on the king-tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02289587 CN2583190Y (en) | 2002-11-25 | 2002-11-25 | Chain support bridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02289587 CN2583190Y (en) | 2002-11-25 | 2002-11-25 | Chain support bridge structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2583190Y true CN2583190Y (en) | 2003-10-29 |
Family
ID=33749089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02289587 Expired - Lifetime CN2583190Y (en) | 2002-11-25 | 2002-11-25 | Chain support bridge structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2583190Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775365A (en) * | 2015-02-28 | 2015-07-15 | 张跃平 | Cable-stayed bridge construction method |
| CN110939066A (en) * | 2019-12-06 | 2020-03-31 | 中铁大桥勘测设计院集团有限公司 | Method for determining tension of anchor cross-wire strand |
-
2002
- 2002-11-25 CN CN 02289587 patent/CN2583190Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775365A (en) * | 2015-02-28 | 2015-07-15 | 张跃平 | Cable-stayed bridge construction method |
| CN110939066A (en) * | 2019-12-06 | 2020-03-31 | 中铁大桥勘测设计院集团有限公司 | Method for determining tension of anchor cross-wire strand |
| CN110939066B (en) * | 2019-12-06 | 2021-08-03 | 中铁大桥勘测设计院集团有限公司 | Method for determining tension of anchor cross-wire strand |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121125 Granted publication date: 20031029 |