CN206233085U - A kind of secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull - Google Patents
A kind of secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull Download PDFInfo
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- CN206233085U CN206233085U CN201621290641.6U CN201621290641U CN206233085U CN 206233085 U CN206233085 U CN 206233085U CN 201621290641 U CN201621290641 U CN 201621290641U CN 206233085 U CN206233085 U CN 206233085U
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- cable
- suspension
- bridge
- suspension rod
- span
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Abstract
The utility model discloses a kind of secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull.Technical essential of the present utility model is that the combined type long-span bridge structure is slant-pull structure near its bridge tower, span centre is suspended-cable structure, and the main push-towing rope middle part of suspended-cable structure is connected by suspension rod with bridge floor girder；Suspension cable more long is connected by secondary suspension rod with the main push-towing rope of the suspended-cable structure in slant-pull structure, and the secondary suspension rod anchor point of the suspension cable is on anchor point and the line of lower anchor point thereon；In the main push-towing rope and secondary suspension rod junction, put more energy into suspension rod connection main push-towing rope and bridge floor girder are installed additional.With main push-towing rope be connected suspension cable by secondary suspension rod by the utility model, and by putting more energy into, with suspension cable be connected bridge floor by suspension rod, effectively combines the large span of suspension cable and the big axial rigidity of suspension cable, improves the span ability and wind resisting stability of bridge.
Description
Technical field
The utility model belongs to Longspan Bridge vibration proof structure technical field, and in particular to a kind of secondary suspension rod of suspension cable oblique pull
Combined type long-span bridge structure.
Background technology
In order to across great river, great river, or zanjon, valley, and even island over strait, the span of required bridge is increasing.
Bridge Structure form of the existing span more than 1000m includes cable-stayed bridge, suspension bridge and combination.Suspension cable and oblique pull group
Bridge structure is closed as shown in figure 1, using suspension cable structure system near bridge tower, and suspended-cable structure body is used in span centre part
System.In Fig. 1,1 represents left bridge tower, and 2 represent suspension cable, and 3 represent main push-towing rope, and 4 represent suspension rod, and 5 represent right bridge tower, and 6 represent bridge floor master
Beam.
Under gravity, with the increase of its length, its sag also increases sharply suspension cable, as shown in Figure 2.Identical
The inclination angle angle of horizontal plane (upper and lower anchored end line with), Suo Li and linear meter(lin.m.) quality (quality of unit length rope) under, oblique pull
The sag f of rope approximately square is directly proportional to span L, and in Fig. 2, T represents cable tension.When suspension cable is shorter, its axial direction
Rigidity (upper and lower anchored end is along the Suo Li incrementss required for line direction increase unit length) is big, and bridge intrinsic frequency is high, resists
Wind stability is good；And with the increase of bridge span, suspension cable length increases, the sag of suspension cable increases rapidly, causes oblique pull
The axial rigidity of rope is significantly reduced.The reduction of suspension cable axial rigidity will cause the reduction of bridge intrinsic frequency, and bridge is in wind
Effect is lower will easily to occur various wind-induced vibrations, therefore, the span of cable-stayed bridge is reached after 1000m, it is difficult to continue to increase.
Bridge floor load is transferred to main push-towing rope by suspension bridge using two huge main push-towing ropes across two bridge tower tops, suspension rod, and main push-towing rope will
All bridge floor vertical loads are transferred to bridge tower.Relative to cable-stayed bridge, the span ability of suspension bridge is bigger, but suspension bridge is hung down using big
Degree main push-towing rope bear bridge vertical load, load is along main push-towing rope cross direction profiles, and main push-towing rope lateral stiffness is small, thus suspension bridge intrinsic frequency
It is lower, it is more easy to the significantly vibration caused danger under wind action.Existing suspension bridge is required for using various additional wind-resistance measures,
Suppress the wind-induced vibration of bridge.
In order to further increase the span and wind resisting stability of bridge, Partial Bridges use oblique pull and combination both suspension cable
System, i.e., use suspension cable structure system near bridge tower, and uses suspended-cable structure system in span centre part.The addition energy of suspension cable
Increase the antitorque and bending rigidity of suspension bridge, but with the increase of suspension cable length, its axial rigidity is equally significantly reduced, therefore
The simple combination of the two can not greatly improve the antitorque and bending rigidity of bridge, therefore be difficult to improve the wind resistance stabilization of bridge
Property, the span ability of bridge also is difficult to improve, and some special geographical environments need the bigger bridge structure of span ability
Form.
The content of the invention
The purpose of this utility model is to provide a kind of secondary suspension rod group of suspension cable oblique pull that can improve Wind-resistance of Bridges stability
Box-like long-span bridge structure.
Above-mentioned purpose of the present utility model is realized by the following technical solutions：The secondary suspension rod group of the suspension cable oblique pull
Box-like long-span bridge structure is slant-pull structure near its bridge tower, span centre is suspended-cable structure, and the main push-towing rope middle part of suspended-cable structure is by hanging
Bar is connected with bridge floor girder；Suspension cable more long is connected by secondary suspension rod with the main push-towing rope of the suspended-cable structure in slant-pull structure,
And the secondary suspension rod anchor point of the suspension cable is on anchor point and the line of lower anchor point thereon；The main push-towing rope with it is secondary
Suspension rod junction, installs put more energy into suspension rod connection main push-towing rope and bridge floor girder additional.
Specifically, the secondary suspension rod anchor point is located at the midpoint of suspension cable.
Specifically, the suspension rod of putting more energy into is vertical with bridge floor girder.
Span centre of the present utility model is suspended-cable structure, near bridge tower be slant-pull structure, and for suspension cable more long, lead to
Cross secondary suspension rod to be connected with main push-towing rope, with suspension cable be connected bridge floor by suspension rod by putting more energy into, effectively combine the large span and oblique pull of suspension cable
The big axial rigidity of rope, improves the span ability and wind resisting stability of bridge.Base of the utility model in cable suspension bridge beam
On plinth, using secondary suspension rod and suspension rod of putting more energy into, suspension cable, cable-stayed system are efficiently combined, bridge is significantly improved with the cost of very little
Rigidity and wind resisting stability, for bridge with super-large span design provide new method.
Brief description of the drawings
Fig. 1 is existing suspension cable and oblique pull combined bridge structural representation.
Fig. 2 is the force analysis figure of existing highway bridge suspension cable.
Fig. 3 is the structural representation of the utility model embodiment.
Fig. 4 is the force analysis figure of the utility model bridge stay cable.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
It is the secondary suspension rod combined type long-span bridge structural representation of suspension cable oblique pull of the utility model embodiment referring to Fig. 3,
As can be seen from Fig. 3, left bridge tower 1 and right bridge tower 5 are neighbouring for slant-pull structure, span centre are suspended-cable structure, in the main push-towing rope 3 of suspended-cable structure
Portion is connected by suspension rod 4 with bridge floor girder 6.It is also shown from Fig. 3, left bridge tower 1 and right bridge tower 5 are in the slant-pull structure of span centre
Two suspension cables 2 more long are connected by two secondary suspension rods 7 with the main push-towing rope 3 of suspended-cable structure respectively, and make the secondary of suspension cable 2
Suspension rod anchor point is on upper anchor point and the line of lower anchor point of suspension cable 2；In the junction of main push-towing rope 3 and secondary suspension rod 7,
Install put more energy into the connection main push-towing rope 3 of suspension rod 8 and bridge floor girder 6 additional, suspension rod 7 of putting more energy into is vertical with bridge floor girder 6.
Principle of the present utility model is as follows：
Bridge can be twisted under wind effect, bent etc. it is various forms of significantly vibrate, and with bridge span
Increase, the reduction of structural natural frequencies, the possibility that it occurs significantly wind-induced vibration is bigger.
Suspension bridge undertakes all bridge floor loads using main push-towing rope, and main push-towing rope laterally undertakes load, although large carrying capacity, but laterally
Rigidity is small, and bridge intrinsic frequency is low, and wind-induced vibration easily occurs.
Cable-stayed bridge undertakes bridge floor vertical load by suspension cable axial direction tensioning, and when suspension cable is shorter, setting out is small, closely
Like being straight line, its axial rigidity is big, thus cable-stayed bridge intrinsic frequency is higher, is not susceptible to wind-induced vibration.With bridge span
Increase, suspension cable increases, and setting out f square is increased with suspension cable span L, and its axial rigidity is significantly reduced, and bridge is solid
Having frequency reduces rapidly, and the wind resisting stability of cable-stayed bridge reduces rapidly with the increase of span.In order to reduce the sag of suspension cable,
Increase secondary suspension rod on suspension cable, connect suspension cable and suspension cable main push-towing rope, make the upper and lower anchor point of suspension cable and secondary Hanger Anchor
On same straight line, the sag of suspension cable is significantly reduced, and axial rigidity is also significantly improved, as shown in Figure 4 for solid point.Due to secondary
Suspension rod to suspension cable for laterally load, the lateral stiffness very little of suspension cable, thus only need very little power F (F be much smaller than suspension cable
Tension force T) the secondary suspension rod anchor point of suspension cable can be moved on the line of the upper and lower anchor point of suspension cable.To reduce suspension cable
Main push-towing rope deformation effect suspension cable it is linear, in secondary suspension rod and main push-towing rope junction, install put more energy into suspension rod connection main push-towing rope and girder additional, subtract
The movement of small main push-towing rope and secondary suspension rod tie point, as shown in Figure 3.
Because the sag of suspension cable is reduced, suspension cable just can be with longer, and the suspension cable bridge portion of center section can be with
Shorter, compared with existing cable suspension bridge beam body system, the intrinsic frequency of bridge of the present utility model is higher, and wind resisting stability is more
Good, its span can be bigger.Similarly, the secondary suspension rod of multiple spot can be used to longer suspension cable, further increase suspension cable axle
To rigidity；For shorter suspension cable, can be preferably located in suspension cable only with a secondary suspension rod, secondary suspension rod anchor point
At point.
Above example is only used for explaining the utility model that be not used to limit the utility model, the utility model may be used also
To have other deformations, conversion and application, such as：
(1) secondary suspension rod can use different directions.
(2) secondary suspension rod can be directly connected to bridge floor.
(3) same point connects many suspension rods of putting more energy into.
(4) the secondary suspension rod in many places is increased on same suspension cable.
(5) suspension bridge middle part suspension rod 4 is fully phased out.
Claims (3)
1. the secondary suspension rod combined type long-span bridge structure of a kind of suspension cable oblique pull is slant-pull structure near its bridge tower, span centre is suspension cable
Structure, the main push-towing rope middle part of suspended-cable structure is connected by suspension rod with bridge floor girder；It is characterized in that：Oblique pull more long in slant-pull structure
Rope is connected by secondary suspension rod with the main push-towing rope of the suspended-cable structure, and the secondary suspension rod anchor point of the suspension cable is in anchor thereon
On solid point and the line of lower anchor point；In the main push-towing rope and secondary suspension rod junction, put more energy into suspension rod connection main push-towing rope and bridge floor are installed additional
Girder.
2. the secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull according to claim 1, it is characterised in that：It is described secondary
Suspension rod anchor point is located at the midpoint of suspension cable.
3. the secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull according to claim 1, it is characterised in that：It is described to put more energy into
Suspension rod is vertical with bridge floor girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621290641.6U CN206233085U (en) | 2016-11-29 | 2016-11-29 | A kind of secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621290641.6U CN206233085U (en) | 2016-11-29 | 2016-11-29 | A kind of secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206233085U true CN206233085U (en) | 2017-06-09 |
Family
ID=58980210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621290641.6U Withdrawn - After Issue CN206233085U (en) | 2016-11-29 | 2016-11-29 | A kind of secondary suspension rod combined type long-span bridge structure of suspension cable oblique pull |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206233085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400670A (en) * | 2016-11-29 | 2017-02-15 | 湖南科技大学 | Suspended-cable and cable-stayed secondary suspender combined type large-span bridge structure |
-
2016
- 2016-11-29 CN CN201621290641.6U patent/CN206233085U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400670A (en) * | 2016-11-29 | 2017-02-15 | 湖南科技大学 | Suspended-cable and cable-stayed secondary suspender combined type large-span bridge structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170609 Effective date of abandoning: 20180515 |