CN106835938A - A kind of beam-arch structure and beam-arch composition bridge - Google Patents
A kind of beam-arch structure and beam-arch composition bridge Download PDFInfo
- Publication number
- CN106835938A CN106835938A CN201710218572.0A CN201710218572A CN106835938A CN 106835938 A CN106835938 A CN 106835938A CN 201710218572 A CN201710218572 A CN 201710218572A CN 106835938 A CN106835938 A CN 106835938A
- Authority
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- Prior art keywords
- arch
- suspension rod
- girder
- arch rib
- rib
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D12/00—Bridges characterised by a combination of structures not covered as a whole by a single one of groups E01D2/00 - E01D11/00
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
- E01D6/02—Truss-type bridges of bowstring type
Abstract
The present invention relates to a kind of beam-arch structure and beam-arch composition bridge.The invention discloses a kind of beam-arch structure, including two skewbacks, arch rib and girder are connected between two skewbacks, several suspension rods of interval setting between the girder and the arch rib, all suspension rods are symmetrical arranged on the arch rib span centre and do not interlock, and relatively described arch rib span centre is obliquely installed each described suspension rod and the bottom of each suspension rod is close to the arch rib span centre respectively.With a kind of beam-arch structure of the present invention, compare existing vertical suspension rod beam-arch structure or Nielsen style beam-arch structure, because suspension rod is symmetrical arranged on arch rib span centre and does not interlock, and be obliquely installed to arch rib span centre, make a concerted effort size of all suspension rods to arch rib tension level component can effectively be increased, thrust of the arch rib to skewback is reduced with this, reduce the stress in arch springing section, this is simple and reliable for structure, can be constructed using existing method, the internal force in arch springing section is effectively reduced, is increased the safety coefficient of structure or the design difficulty of reduction skewback and is built materials.
Description
Technical field
The present invention relates to science of bridge building field, more particularly to a kind of beam-arch structure and beam-arch composition bridge.
Background technology
Beam-arch composition bridge organically combines two kinds of structural systems of large-span continuous beam and arch, and the two common cooperation will
Load in the range of across footpath is delivered on bearing.The advantage of arch is that the rigidity of structure is big, potential bearing capacity is big, stock utilization is high；Beam
Advantage can be to directly take on train load and can undertake larger pulling force, therefore the two is combined, and can play each of which
Advantage, their own shortcoming can be overcome again, be a kind of structure stress rationally, good appearance, novel bridge.
Existing beam-arch composition bridge can be divided into two classes according to the arrangement of suspension rod, and the first kind is to use vertical suspension rod, such as
Shown in Fig. 1；Equations of The Second Kind, as shown in Fig. 2 this kind of suspension rod arrangement is also Nielsen style, is intersected oblique using oblique suspension rod is intersected
Suspension rod can improve the integral rigidity of rib structure relative to vertical lifted pile layout, but in order to avoid intersecting suspension rod in sky
Between on conflict, it is necessary to using hand basket arch structure (i.e. two panels arch rib needs to be inclined to bridge inner side), CFST X-type arch is tiltedly hung with intersecting
The arch rib construction of bar combination is sufficiently complex, therefore using seldom in actual design, built beam-arch composition bridge is substantially all to be adopted
With vertical suspension rod.
As shown in the figures 1 and 2, a skewback 1 is respectively provided with two adjacent bridge piers 6, girder 3 is connected between two skewbacks 1
And arch rib 2, arch rib 2 be located at the top of girder 3, several suspension rods 4 are set between arch rib 2 and girder 3, arch rib 2 intersects with skewback 1
The section of arch rib 2 at place is referred to as arch springing section, and arch springing section is the maximum section of the stress of arch rib 2, is also the design of beam-arch composition bridge
Controlling position；No matter using vertical suspension rod or intersect oblique suspension rod, the arch springing section stress of existing beam-arch composition bridge all than larger,
And turned into one of major control factors of such Bridge Design；The internal force in arch springing section how is reduced, is arch bridge design person
Always in thinking and the technical issues that need to address.
The content of the invention
It is an object of the invention to overcome the arch springing section stress in the presence of prior art big, the security of structure is influenceed
Above-mentioned deficiency, there is provided a kind of beam-arch structure and beam-arch composition bridge.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of beam-arch structure, including two skewbacks, are connected with arch rib and girder between two skewbacks, the girder and
Several suspension rods of interval setting between the arch rib, all suspension rods are symmetrical arranged on the arch rib span centre and do not hand over
Mistake, each described suspension rod respectively relatively described arch rib span centre be obliquely installed and each suspension rod bottom be close to the arch rib across
In.
Using a kind of beam-arch structure of the present invention, existing vertical suspension rod beam-arch structure or Nielsen style beam are compared
Arch structure, because suspension rod is symmetrical arranged on arch rib span centre and does not interlock, and is obliquely installed to arch rib span centre, can effectively increase
All suspension rods reduce thrust of the arch rib to skewback to the size of making a concerted effort of arch rib tension level component with this, that is, reduce arch springing section
Stress, this is simple and reliable for structure, using existing method can construction, effectively reduce the internal force in arch springing section, same area
Increase the safety coefficient of structure under arch springing section, the size in arch springing section is reduced under same safety coefficient and skewback is reduced
Design difficulty and build materials.
Preferably, the suspension rod and the inclination angle of the girder are θ, 90 ° of 60 °≤θ ＜.
Herein it should be noted that suspension rod described in i-th is θ with the inclination angle of the girderi, 60 °≤θi90 ° of ＜.
Preferably, it is vertically arranged the suspension rod at the arch rib span centre.
Preferably, the suspension rod is flexible suspension rod, including hoist cable and pillar, the pillar are socketed on outside the hoist cable.
Preferably, the pillar uses stainless steel.
Preferably, all suspension rods are generally aligned in the same plane interior with the arch rib.
Preferably, the connecting portion of each suspension rod is provided with bucker.
Preferably, the girder connects and waterproof construction is provided with the suspension rod, and the waterproof construction includes being located at the master
The projection on beam top, the projection has the gradient, and slopes down to the girder top surface by the suspension rod.
Using this structure, during the position that rainwater is fallen at the top of suspension rod connection girder, the slope along projection flows to girder
Top surface is elsewhere, it is ensured that prominence does not remain ponding.
Preferably, the gradient is more than or equal to 2%, set the scope of the gradient and the numerical value of the gradient according to
Local storm intensity determines.
Present invention also offers a kind of beam-arch composition bridge, including at least one beam-arch structure as described in any of the above and
Several bridge piers, two skewbacks of each beam-arch structure are located therein on the two neighboring bridge pier, and remaining is adjacent
Girder is set between two bridge piers.
Using a kind of beam-arch composition bridge of the present invention, existing vertical suspension rod beam-arch composition bridge or Nelson's body are compared
Binder encircles composite bridge, because suspension rod is symmetrical arranged on arch rib span centre and does not interlock, and is obliquely installed to arch rib span centre, Neng Gouyou
The all suspension rods of effect increase reduce thrust of the arch rib to skewback to the size of making a concerted effort of arch rib tension level component with this, that is, reduce arch
The stress in pin section, this is simple and reliable for structure, can be constructed using existing method, effectively reduces the internal force in arch springing section, equally
Increase the safety coefficient of structure under the arch springing section of area, the size in arch springing section is reduced under same safety coefficient and is subtracted
The design difficulty and construction materials of few skewback.
Preferably, the beam-arch structure also includes suspension rod crossbeam, and the suspension rod crossbeam is located at the girder bottom and along institute
The setting of girder cross section is stated, the suspension rod is through the girder and is connected to the suspension rod crossbeam.
In sum, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, with a kind of beam-arch structure of the present invention, existing vertical suspension rod beam-arch structure or Nielsen style are compared
Beam-arch structure, because suspension rod is symmetrical arranged on arch rib span centre and does not interlock, and is obliquely installed to arch rib span centre, can effectively increase
Big all suspension rods reduce thrust of the arch rib to skewback to the size of making a concerted effort of arch rib tension level component with this, that is, reduce arch springing and cut
The stress in face, this is simple and reliable for structure, can construction, the effectively internal force in reduction arch springing section, same area using existing method
Arch springing section under increase the safety coefficient of structure, the size in arch springing section is reduced under same safety coefficient and arch is reduced
The design difficulty and construction materials of seat；
2nd, with a kind of beam-arch structure of the present invention, the girder to be connected and be provided with waterproof construction at the suspension rod, institute
Stating waterproof construction includes being located at the projection on the girder top, and the projection has the gradient, and is sloped down to by the suspension rod
The girder top surface, using this structure, during the position that rainwater is fallen at the top of suspension rod connection girder, flows to along the slope of projection
Girder top surface is elsewhere, it is ensured that prominence does not remain ponding；
3rd, with a kind of beam-arch composition bridge of the present invention, existing vertical suspension rod beam-arch composition bridge or Nelson are compared
System beam-arch composition bridge, because suspension rod is symmetrical arranged on arch rib span centre and does not interlock, and is obliquely installed to arch rib span centre, can
Effectively increase make a concerted effort size of all suspension rods to arch rib tension level component, thrust of the arch rib to skewback is reduced with this, that is, reduce
The stress in arch springing section, this is simple and reliable for structure, can be constructed using existing method, effectively reduces the internal force in arch springing section, together
Increase the safety coefficient of structure under the arch springing section of sample area, reduced under same safety coefficient arch springing section size and
Reduce the design difficulty of skewback and build materials.
Brief description of the drawings
Fig. 1 is the structural representation of existing vertical suspension rod beam-arch composition bridge；
Fig. 2 is the structural representation of existing Nielsen style beam-arch composition bridge；
Fig. 3 is the structural representation of beam-arch composition bridge of the present invention；
Fig. 4 is the partial side view of Fig. 3；
Fig. 5 is the schematic diagram of waterproof construction；
Fig. 6 is the stress diagram of beam-arch structure；
Fig. 7 is arch rib X-direction stress diagram.
Marked in figure：1- skewbacks, 2- arch ribs, 3- girders, 31- projections, 4- suspension rods, 41- hoist cables, 42- pillars, 5- waterproofs
Cover, 6- bridge piers, 7- suspension rod crossbeams.
Specific embodiment
With reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
For the scope of above-mentioned theme of the invention is only limitted to following embodiment, all technologies realized based on present invention belong to this
The scope of invention.
Embodiment
As shown in fig. 3 to 7, a kind of beam-arch composition bridge of the present invention, including at least one beam-arch structure and several bridges
Pier 6, two skewbacks 1 of each beam-arch structure are located therein on the two neighboring bridge pier 6, remaining two neighboring institute
State setting girder 3 between bridge pier 6.
The beam-arch structure includes two skewbacks 1, and arch rib 2 and girder 3, the master are connected between two skewbacks 1
Several suspension rods 4 of interval setting between beam 3 and the arch rib 2, all suspension rods 4 are symmetrical arranged on the span centre of the arch rib 2
And do not interlock, the relatively described span centre of arch rib 2 is obliquely installed each described suspension rod 4 and the bottom of each suspension rod 4 is leaned on respectively
To the span centre of the arch rib 2.Suspension rod 4 described in i-th is θ with the inclination angle of the girder 3i, 60 °≤θi90 ° of ＜.
As a preferred scheme of the present embodiment, the suspension rod 4 is vertically arranged at the span centre of the arch rib 2, it is all described
Suspension rod 4 is generally aligned in the same plane interior with the arch rib 2.As shown in figure 4, the beam-arch structure also includes suspension rod crossbeam 7, the suspension rod
Crossbeam 7 is located at the bottom of the girder 3 and is set along the cross section of the girder 3, and the suspension rod 4 is through the girder 3 and is connected to
The suspension rod crossbeam 7.
As shown in figure 5, the suspension rod 4 is flexible suspension rod, including hoist cable 41 and pillar 42, the pillar 42 is socketed on described
Outside hoist cable 41, the pillar 42 uses stainless steel.The connecting portion of each suspension rod 4 is provided with bucker 5.The girder
Waterproof construction is provided with the 3 connection suspension rods 4, the waterproof construction includes the projection 31 located at the top of the girder 3, described prominent
Playing 31 has the gradient, and slopes down to the top surface of the girder 3 by the suspension rod 4, and using this structure, rainwater falls into suspension rod 4
During the position at the top of connection girder 3, the top surface of girder 3 is flowed to elsewhere along the slope of projection, it is ensured that do not remained at projection 31
Ponding；The gradient is equal to 2%.
As shown in fig. 6, in the presence of the deadweight of the girder 3 and load, 4 pairs of works of the arch rib 2 of suspension rod described in i-th
It is f with pulling forcei, the arch rib 2 deadweight and the pulling force effect of the suspension rod 4 under can act thrust F to the skewback 1, by
Active force and reaction force principle, the skewback 1 also can produce deboost F, pulling force f to arch springing sectioniWith thrust F decomposable asymmetric choice nets
It is horizontal x directions and the component in vertical y directions.
It can be seen from y directions stress balance according to the arch rib 2, the y directions vertical force sum that external load is produced is 0, described
Arch rib 2 is conducted oneself with dignity and the vertical tension ∑ f of all suspension rods 4iyWith the vertical component F of the thrust F of the skewback 1yIn the opposite direction, thus institute
Arch rib 2 is stated to conduct oneself with dignity and the vertical tension ∑ f of all suspension rods 4iySum is equal to the vertical component F of the thrust F of the skewback 1y, FyOnly
It is relevant with vertical load, it is unrelated with whether the suspension rod 4 inclines.
As shown in fig. 7, it can be seen from x directions stress balance according to the arch rib 2, the x directions horizontal force that external load is produced it
Be 0, due to the stress of the arch rib 2 on its span centre symmetrical, the x directions horizontal component size phase of left and right half arch rib 2
Deng, it is in opposite direction, wherein the x directions horizontal component of left half arch rib 2 is HIt is left=(∑ fix+Fx), the x of right half arch rib 2
Direction horizontal component is HIt is right=-(∑ fix+Fx)。
For the beam-arch composition bridge of identical span, no matter the suspension rod 4 (refers to that the suspension rod 4 is adopted using which kind of type of attachment
With being vertically arranged, Nielsen style sets or is obliquely installed), when external load is certain, the x directions level point that external load is produced
Power (∑ fix+Fx) it is constant, increase ∑ fixF can be reducedx；
For existing vertical suspension rod beam-arch composition bridge, the vertical inclination angle of the suspension rod 4 is 0, the suspension rod 4 without horizontal component and
∑fixIt is 0, now FxMaximum, and FyOnly it is relevant with vertical load, it is unrelated with whether the suspension rod 4 inclines, so when FxAnd Fy's
F is maximum with joint efforts, and arch springing section and the stress of the skewback 1 are maximum；
For existing Nielsen style beam-arch composition bridge, the adjacent angle of inclination of the suspension rod 4 is conversely, the level of its generation
Component major part is cancelled out each other, ∑ fixVery little and be difficult adjustment, ∑ fixTo FxInfluence very little, is also possible to that negative interaction can be played sometimes,
Now FxIt is larger, so when FxAnd FyMake a concerted effort F it is larger, arch springing section and the stress of the skewback 1 are larger；
For beam-arch composition bridge of the present invention, because the suspension rod 4 is obliquely installed, vertical suspension rod beam-arch composition is compared
Bridge and Nielsen style beam-arch composition bridge can increase ∑ fix, therefore beam-arch composition bridge F of the present inventionxIt is smaller, FxAnd Fy's
F is smaller with joint efforts, and arch springing section and the stress of the skewback 1 are greatly reduced.
With a kind of beam-arch composition bridge of the present invention, existing vertical suspension rod beam-arch composition bridge or Nelson's body are compared
Binder encircles composite bridge, because suspension rod 4 is symmetrical arranged on the span centre of arch rib 2 and does not interlock, and is obliquely installed to the span centre of arch rib 2, energy
Enough sizes of making a concerted effort for effectively increasing all suspension rods 4 to the tension level component of arch rib 2, thrust of the arch rib 2 to skewback 1 is reduced with this,
Reduce the stress in arch springing section, this is simple and reliable for structure, can be constructed using existing method, effectively reduce the interior of arch springing section
Power, increases the safety coefficient of structure under the arch springing section of same area, the area that arch springing section is reduced under same safety coefficient is big
Design difficulty that is small and reducing skewback 1 and construction materials.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of beam-arch structure, including two skewbacks (1), arch rib (2) and girder (3) are connected between two skewbacks (1),
Several suspension rods (4) of interval setting between the girder (3) and the arch rib (2), it is characterised in that all suspension rods (4)
It is symmetrical arranged on the arch rib (2) span centre and is not interlocked, each described suspension rod (4) relatively described arch rib (2) span centre respectively
It is obliquely installed and the bottom of each suspension rod (4) is close to the arch rib (2) span centre.
2. a kind of beam-arch structure according to claim 1, it is characterised in that the suspension rod (4) is inclined with the girder (3)
Angle is θ, 90 ° of 60 °≤θ ＜.
3. a kind of beam-arch structure according to claim 1, it is characterised in that be vertically arranged institute at arch rib (2) span centre
State suspension rod (4).
4. a kind of beam-arch structure according to claim 1, it is characterised in that the suspension rod (4) is flexible suspension rod, including is hung
Rope (41) and pillar (42), the pillar (42) are socketed on the hoist cable (41) outward.
5. a kind of beam-arch structure according to claim 1, it is characterised in that all suspension rods (4) and the arch rib (2)
In being generally aligned in the same plane.
6. a kind of beam-arch structure according to claim 1, it is characterised in that the connecting portion of each suspension rod (4) sets
There is bucker (5).
7. a kind of beam-arch structure according to claim any one of 1-6, it is characterised in that girder (3) connection is described
Suspension rod (4) place is provided with waterproof construction, and the waterproof construction includes the projection (31) located at the girder (3) top, the projection
(31) with the gradient.
8. a kind of beam-arch structure according to claim 7, it is characterised in that the gradient is more than or equal to 2%.
9. a kind of beam-arch composition bridge, it is characterised in that including at least one beam-arch structure as described in claim any one of 1-8
With several bridge piers (6), two skewbacks (1) of each beam-arch structure are located therein the two neighboring bridge pier (6)
On, girder (3) is set between remaining two neighboring described bridge pier (6).
10. a kind of beam-arch composition bridge according to claim 9, it is characterised in that the beam-arch structure also includes that suspension rod is horizontal
Beam (7), the suspension rod crossbeam (7) is set positioned at the girder (3) bottom and along the girder (3) cross section, the suspension rod (4)
Through the girder (3) and it is connected to the suspension rod crossbeam (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710218572.0A CN106835938A (en) | 2017-04-05 | 2017-04-05 | A kind of beam-arch structure and beam-arch composition bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710218572.0A CN106835938A (en) | 2017-04-05 | 2017-04-05 | A kind of beam-arch structure and beam-arch composition bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106835938A true CN106835938A (en) | 2017-06-13 |
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ID=59142885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710218572.0A Pending CN106835938A (en) | 2017-04-05 | 2017-04-05 | A kind of beam-arch structure and beam-arch composition bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374324A (en) * | 2018-04-09 | 2018-08-07 | 广西大学 | Big truss arched bridge |
| CN108930222A (en) * | 2018-07-18 | 2018-12-04 | 广西大学 | Camber consolidates triangle arch bridge |
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| CN108374324B (en) * | 2018-04-09 | 2023-12-19 | 广西大学 | large truss arch bridge |
| CN108930222A (en) * | 2018-07-18 | 2018-12-04 | 广西大学 | Camber consolidates triangle arch bridge |
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