CN105463979B - Space trident beam string foot bridge - Google Patents
Space trident beam string foot bridge Download PDFInfo
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- CN105463979B CN105463979B CN201610008350.1A CN201610008350A CN105463979B CN 105463979 B CN105463979 B CN 105463979B CN 201610008350 A CN201610008350 A CN 201610008350A CN 105463979 B CN105463979 B CN 105463979B
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- girder
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- line
- connecting rod
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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
- E01D12/00—Bridges characterised by a combination of structures not covered as a whole by a single one of groups E01D2/00 - E01D11/00
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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
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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
- E01D19/04—Bearings; Hinges
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of space trident beam string foot bridge, including the first girder, the second girder and the 3rd girder, one end of three road girders is intersected in the node that crosses, and the other end of three road beams is supported on abutment by hold-down support；Be provided with the first drag-line between in the middle part of first girder and in the middle part of described second girder, in the middle part of the second girder and in the middle part of the 3rd girder between be provided with the second drag-line, in the middle part of the 3rd girder and in the middle part of the first girder between be provided with the 3rd drag-line；The side wall of node of crossing is provided with three otic placodes, is provided with first connecting rod, is provided with second connecting rod, is provided with third connecting rod between third ear plate and the 3rd drag-line between the second otic placode and the second drag-line between the first otic placode and the first drag-line.Horizontal displacement under bearing vertical uniform load q for the energy limiting structure of the present invention, can lift the integral rigidity of trident beam string bridge, it is possible to decrease three road girders cross the stress raisers degree of node, meanwhile, can improve vibration comfort during pedestrian bridge.
Description
Technical field
The present invention relates to bridge construction technical field, particularly to a kind of space trident beam string foot bridge.
Background technology
Beam string bridge have stress clearly, from heavy and light the features such as, its concept proposed the eighties in 20th century.Beam string bridge
Structural system is more succinct, girder (bridge deck) scale of construction is huge, and conventionally form has the letter of a girder (single girder) for setting
Strutbeam, this kind of version is easy to design, construction and later maintenance, existing application example in science of bridge building at home.
But, beam string bridge also has shortcoming：The rigidity of tension string beam structure is little, amount of deflection under live loading for the girder, bridge floor
Acceleration under the effect of mobile load exciting force is all larger.If beam string bridge is used for foot bridge, the vibration comfort to gap bridge pedestrian
There is considerable influence.
Particularly, when girder be trinary beam, the node that crosses of girder arch upward upwards, drag-line horizontal alignment " indent " when, if
Using the structural system of conventional beam string bridge, then there is following point：1) integral rigidity of structure subtracts with respect to single main beam structure
Weak；2) horizontal displacement under bearing vertical uniform load q for the structure is larger；3) the vibration comfort problem of pedestrian bridge is more tight
Weight.
Content of the invention
In view of the drawbacks described above of prior art, the technical purpose of the present invention is to provide a kind of space trident beam string people
Row bridge, improves larger, pedestrian bridge the vibration comfort problem of horizontal displacement under bearing vertical uniform load q for the existing structure
The defect such as more serious.
For achieving the above object, the invention provides a kind of space trident beam string foot bridge, including the first girder, second
Girder and the 3rd girder, one end of described first girder, described second girder and described 3rd girder is the end that crosses, described first
The end that crosses of girder, described second girder and described 3rd girder is intersected in the node that crosses, described first girder, described second master
The other end of beam and described 3rd girder be supported end, described first girder, described second girder and described 3rd girder
Socket end is supported on abutment by the first hold-down support, the second hold-down support and the 3rd hold-down support respectively；In described first girder
Be provided with the first drag-line between in the middle part of portion and described second girder, in the middle part of described second girder and in the middle part of described 3rd girder between set
Have the second drag-line, in the middle part of described 3rd girder and in the middle part of described first girder between be provided with the 3rd drag-line；The described node that crosses
Side wall is provided with three otic placodes, and three described otic placodes are respectively the first otic placode, the second otic placode and third ear plate, and described first otic placode sets
Be placed in described first girder and described second girder intersection crosses on the wall of node side, and described second otic placode is arranged at described the
Two girders cross on the wall of node side with described 3rd girder intersection, and described third ear plate is arranged at described 3rd girder and institute
State crossing on the wall of node side of the first girder intersection；It is provided with first connecting rod between described first otic placode and described first drag-line,
It is provided with second connecting rod between described second otic placode and described second drag-line, be provided between described third ear plate and described 3rd drag-line
Third connecting rod.
Can bear, using hold-down support, the horizontal thrust that girder produces under outer load action, can bear limiting structure
Horizontal displacement under vertical uniform load q, discharges rotation displacement, makes trident beam string form 3 points of hinged space arch structures, can
The integral rigidity of lifting trident beam string bridge.
Further, it is provided with the first anchor structure inside described first girder span centre, set inside described second girder span centre
There is the second anchor structure, inside described 3rd girder span centre, be provided with the 3rd anchor structure；The two ends of described first drag-line anchor respectively
It is fixed on described first anchor structure and described second anchor structure, the two ends of described second drag-line are anchored in described second respectively
On anchor structure and described 3rd anchor structure, the two ends of described 3rd drag-line are anchored in described 3rd anchor structure and respectively
On one anchor structure.
Further, described first drag-line, described second drag-line and described 3rd drag-line are parallel steel stranded wire drag-line, institute
State after the first drag-line, described second drag-line and described 3rd drag-line are installed and carry out tensioning.According to the principle of Cable Structure Stress stiffening,
The integral rigidity that largely active tensioning can effectively lift trident beam string bridge is carried out to three drag-lines, drag-line is carried out open
The stretching force size drawn should by Bridge Design teacher according to meet bridge structure stress, rigidity, stability etc. items technical performance
Requirement determining.
Further, described first drag-line, described second drag-line and described 3rd drag-line are respectively equipped with the first drag-line curved
Break, the second drag-line inflection point and the 3rd drag-line inflection point, described first drag-line inflection point is provided with the first steering gear, and described
Two drag-line inflection points are provided with the second steering gear, and described 3rd drag-line inflection point is provided with the 3rd steering gear；Described first connecting rod,
Described second connecting rod and described third connecting rod are equipped with upper end articulated section and lower end articulated section；Described first connecting rod, described second
The upper end articulated section of connecting rod and described third connecting rod is cut with scissors with described first otic placode, described second otic placode and described third ear plate respectively
Connect, the upper end articulated section of described first connecting rod, described second connecting rod and described third connecting rod all can rotate in vertical guide；Described
The lower end articulated section of one connecting rod, described second connecting rod and described third connecting rod respectively with described first steering gear, described second turn
Hinged to device and described 3rd steering gear, the lower end articulated section of described first connecting rod can be in two anchors at described first drag-line two ends
Rotate in the space plane that the upper end articulated section of solid point and described first connecting rod is constituted, the lower end articulated section of described second connecting rod can
Rotate in the space plane that the upper end articulated section of two anchor points at described second drag-line two ends and described second connecting rod is constituted,
The lower end articulated section of described third connecting rod can be in the upper end of two anchor points at described 3rd drag-line two ends and described third connecting rod
Rotate in the space plane that articulated section is constituted.The two ends of connecting rod adopt hinged form, release the Moment at End of connecting rod, can drop
Low three road girders cross the stress raisers degree of node, it is possible to decrease the local that parallel steel stranded wire drag-line inflection point is born is curved
Square.
The intersection point of two anchor points, connecting rod and otic placode of drag-line, these three points can form a space plane, and drag-line bends
Point is located in this plane.Between drag-line inflection point and two anchor points of drag-line, the distance controlling of straight line is 1000mm.First drag-line
The particular location of inflection point, the second drag-line inflection point and the 3rd drag-line inflection point is subject to according to meeting bridge structure by Bridge Design teacher
Determining, this drag-line inflection point is that unique exist for the requirement of the items technical performance such as power, rigidity, stability.
Further, described first connecting rod, described second connecting rod and described third connecting rod are conventional reinforcing pull rod.
Further, the length of described first girder is 50m-56m, and the length of described second girder is 20m-24m, described
The length of the 3rd girder is 12m-15m；Described first girder and angle on horizontal plane for described second girder be 130 °-
140 °, described second girder and angle on horizontal plane for described 3rd girder are 100 ° -110 °, described 3rd girder with
Angle on horizontal plane for described first girder is 110 ° -120 °.
Further, the section of described first girder, described second girder and described 3rd girder by together with top board, one
Road base plate, twice skew web plate, twice straight web composition.
Further, the span centre of described first girder arranges a TMD antivibrator, the span centre setting the of described second girder
Two TMD antivibrators, a described TMD antivibrator is arranged at described first main beam section central authorities at base plate, described 2nd TMD
Antivibrator is arranged at described second main beam section central authorities at base plate, and a described TMD antivibrator and described 2nd TMD damp
The weight sum of device is the 1.0%-2.0% of the gross weight of described space trident beam string foot bridge.Wherein single TMD antivibrator
Weight need Bridge Design teacher to be drawn according to the dynamic characteristic calculation of bridge structure.TMD antivibrator can significantly lower three road masters
Acceleration responsive under the excitation of bridge floor pedestrian's load for the beam, can improve vibration comfort during pedestrian bridge.
Further, described first main depth of beam is 0.5m-2.1m, and the width of described first girder top board is 5.0m-
5.4m, the thickness 36mm-40mm of described first girder top board, the width of described first kingpost baseplate is 2.4m-4.9m, described the
The thickness of one kingpost baseplate is 36mm-40mm, and the thickness of the described straight web of first girder and described first girder skew web plate is
14mm-20mm；Described second main depth of beam is 0.5m-1.8m, and the width of described second girder top board is 4.0m-4.4m, institute
The thickness stating the second girder top board is 36mm-40mm, and the width of described second kingpost baseplate is 2.4m-3.8m, and described second is main
The thickness of beam base plate is 36mm-40mm, and the thickness of the described straight web of second girder and described second girder skew web plate is 14mm-
20mm；Described 3rd main depth of beam is 0.5m-1.5m, and the width of described 3rd girder top board is 3.0m-3.2m, the described 3rd
The thickness of girder top board is 36mm-40mm, and the width of described 3rd kingpost baseplate is 1.0m-2.3m, described 3rd kingpost baseplate
Thickness be 36mm-40mm, the thickness of the described straight web of 3rd girder and described 3rd girder skew web plate is 14mm-20mm.
The thickness of the top board, base plate and web of three road girders all partially thick more than 80% for the girder of conventional steel structure bridge,
The bending resistance the moment of inertia of Ke Ling tri- road girder and shearing rigidity significantly improve, and can effectively lift the overall vertically firm of trident beam string bridge
Degree.
Further, described first hold-down support, described second hold-down support and described 3rd hold-down support are 7MN's
Bearing；Described first drag-line, described second drag-line carry out tensioning with described 3rd drag-line stretching force after installing is described parallel
0.2-0.3 times of guy of twisted steel cable tensile strength.
Beneficial effects of the present invention：
The present invention, due to employing said structure design, has the advantages that：1) hold-down support can bear girder and exist
The lower horizontal thrust producing of external load effect, can horizontal displacement under bearing vertical uniform load q for the limiting structure, three can be lifted
The integral rigidity of fork beam string bridge.2) three drag-lines are carried out largely actively by the principle according to Cable Structure Stress stiffening
Tensioning can effectively lift the integral rigidity of trident beam string bridge.3) two ends of connecting rod adopt hinged form, release connecting rod
Moment at End, it is possible to decrease three road girders cross the stress raisers degree of node, it is possible to decrease the local that drag-line inflection point is born
Moment of flexure.4) TMD antivibrator can significantly lower acceleration responsive under the excitation of bridge floor pedestrian's load for the three road girders, can improve pedestrian
Vibration comfort during gap bridge.5) thickness of the top board, base plate and web of three road girders is with respect to the master of conventional steel structure bridge
For beam, the bending resistance the moment of inertia of all partially thick more than 80%, Ke Ling tri- road girder and shearing rigidity significantly improve, and can effectively lift three
The overall vertical rigidity of fork beam string bridge.
Technique effect below with reference to design, concrete structure and generation to the present invention for the accompanying drawing is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description
Fig. 1 is the overlooking the structure diagram of a preferred embodiment of the present invention.
Fig. 2 is along line A-A side view in Fig. 1.
Fig. 3 is along line B-B side view in Fig. 1.
Fig. 4 is along line C-C side view in Fig. 1.
Fig. 5 is along line D-D profile in Fig. 1.
In figure, 1 first girder；11 first hold-down supports；12 first anchor structures；13 the oneth TMD antivibrators；14 first is main
The top board of beam；The straight web of 15 first girders；The skew web plate of 16 first girders；The base plate of 17 first girders；2 second girders；21
Second hold-down support；22 second anchor structures；23 the 2nd TMD antivibrators；3 the 3rd girders；31 the 3rd hold-down supports；32 the 3rd anchors
Fixing structure；4 cross node；41 first otic placodes；42 second otic placodes；43 third ear plates；5 first drag-lines；51 first connecting rods；52 first
Drag-line inflection point；6 second drag-lines；61 second connecting rods；62 second drag-line inflection points；7 the 3rd drag-lines；71 third connecting rods；72 the 3rd
Drag-line inflection point；8 abutments
Specific embodiment
As Figure 1-Figure 4, a specific embodiment of space of the present invention trident beam string foot bridge, including the first girder 1,
Second girder 2 and the 3rd girder 3, one end of the first girder 1, the second girder 2 and the 3rd girder 3 is the end that crosses, the first girder 1,
The end that crosses of the second girder 2 and the 3rd girder 3 is intersected in the node 4 that crosses, the first girder 1, the second girder 2 and the 3rd girder 3
The other end is supported end, the supported end of the first girder 12, the second girder and the 3rd girder 3 pass through respectively the first hold-down support 11,
Second hold-down support 21 and the 3rd hold-down support 31 are supported on abutment 8, the first hold-down support 11, the second hold-down support 21 and the 3rd
Hold-down support 31 is the hold-down support of 7MN.
The hold-down support that the present embodiment uses is existing product in prior art.
It is provided with the first anchor structure 12 inside first girder 1 span centre, inside the second girder 2 span centre, be provided with the second anchor structure
22, it is provided with the 3rd anchor structure 32 inside the 3rd girder 3 span centre；The two ends of the first drag-line 5 are anchored in the first anchor structure respectively
12 and second on anchor structure 22, and the two ends of the second drag-line 6 are anchored in the second anchor structure 22 and the 3rd anchor structure 32 respectively
On, the two ends of the 3rd drag-line 7 are anchored on the 3rd anchor structure 32 and the first anchor structure 12 respectively.First drag-line 5, second draw
Rope 6 and the 3rd drag-line 7 are parallel steel stranded wire drag-line, and parallel steel stranded wire drag-line is existing product in prior art.First draws
Rope, the second drag-line and the 3rd drag-line carry out tensioning after installing, and the stretching force carrying out tensioning is parallel steel stranded wire drag-line tensile strength
0.2-0.3 times.The parallel steel stranded wire drag-line specification that the present embodiment uses is 51 Фs15.24～55 Фs15.24.The present embodiment
The anchor structure using is prior art.
The side wall of node 4 of crossing is provided with three otic placodes, and three otic placodes are respectively the first otic placode 41, the second otic placodes 42 and the 3rd
Otic placode 43, what the first otic placode 41 was arranged at the first girder 1 and the second girder 2 intersection crosses on the wall of node side, the second otic placode 42
Be arranged at the second girder 2 and the 3rd girder 3 intersection crosses on the wall of node side, third ear plate 43 be arranged at the 3rd girder 3 with
First girder 1 intersection crosses on the wall of node side.
First drag-line inflection point 52, the second drag-line bending are respectively equipped with the first drag-line 5, the second drag-line 6 and the 3rd drag-line 7
Point 62 and the 3rd drag-line inflection point 72, the first drag-line inflection point is provided with the first steering gear (not shown), the second drag-line bending
Point is provided with the second steering gear (not shown), and the 3rd drag-line inflection point is provided with the 3rd steering gear (not shown)；Every is drawn
The intersection point of two anchor points, connecting rod and otic placode of rope, these three points can form a space plane, and drag-line inflection point is located at this and puts down
On face.Between drag-line inflection point and two anchor points of drag-line, the distance controlling of straight line is 1000mm.Those skilled in the art should
Know, the position of the first drag-line inflection point, the second drag-line inflection point and the 3rd drag-line inflection point is by Bridge Design teacher according to satisfaction
The requirement of the items technical performance such as bridge structure stress, rigidity, stability is determining.Used in the present embodiment, steering gear is another
Outer patent protection (application number 201520845191.1), here is omitted.
It is provided with first connecting rod 51 between first otic placode 41 and the first steering gear, set between the second otic placode 42 and the second steering gear
There is second connecting rod 61, between third ear plate 43 and the 3rd steering gear, be provided with third connecting rod 71.First connecting rod 51, second connecting rod 61 and
Third connecting rod 71 is conventional reinforcing pull rod, first connecting rod 51, second connecting rod 61 and third connecting rod 71 be equipped with upper end articulated section and
Lower end articulated section；The upper end articulated section of first connecting rod 51, second connecting rod 61 and third connecting rod 71 respectively with the first otic placode 41, second
Otic placode 42 and third ear plate 43 are hinged, and the upper end articulated section of first connecting rod 51, second connecting rod 61 and third connecting rod 71 all can be in lead
Vertical plane rotates；The lower end articulated section of first connecting rod 51, second connecting rod 61 and third connecting rod 71 respectively with the first steering gear, second turn
Hinged to device and the 3rd steering gear, the lower end articulated section of first connecting rod can in two anchor points at the first drag-line two ends and first even
Rotate in the space plane that the upper end articulated section of bar is constituted, the lower end articulated section of second connecting rod can be at two of the second drag-line two ends
Rotate in the space plane that the upper end articulated section of anchor point and second connecting rod is constituted, the lower end articulated section of third connecting rod can be the 3rd
Rotate in the space plane that the upper end articulated section of two anchor points at drag-line two ends and third connecting rod is constituted.
The length of the first girder 1 is 50m-56m, and the length of the second girder 2 is 20m-24m, and the length of the 3rd girder 3 is
12m-15m；First girder 1 and the second girder 2 angle on horizontal plane is 130 ° -140 °, and the second girder 2 and the 3rd is main
Angle on horizontal plane for the beam 3 is 100 ° -110 °, and the angle on horizontal plane is the 3rd girder 3 with the first girder 1
110°-120°.
The section of the first girder 1, the second girder 2 and the 3rd girder 3 by together with top board, together base plate, twice skew web plate,
The straight web of twice forms.The span centre of the first girder 1 arranges a TMD antivibrator 13.As shown in figure 5, the top that the first girder includes
Plate 14, base plate 17, skew web plate 16 and straight web 15, a TMD antivibrator 13 is arranged at the first girder 1 Section Central near base plate
At 17.The span centre of the second girder 2 arranges the 2nd TMD antivibrator 23, and the 2nd TMD antivibrator 23 is arranged in the second girder 2 section
At base plate, the weight sum of a TMD antivibrator 13 and the 2nd TMD antivibrator 23 is space trident beam string foot bridge for centre
Gross weight 1.0%-2.0%.
The height of the first girder 1 is 0.5m-2.1m, and the width of the first girder top board 14 is 5.0m-5.4m, the first girder top
The thickness 36mm-40mm of plate 14, the width of the first kingpost baseplate 17 is 2.4m-4.9m, and the thickness of the first kingpost baseplate 17 is
36mm-40mm, the thickness of the first girder straight web 15 and the first girder skew web plate 16 is 14mm-20mm；The height of the second girder 2
Spend for 0.5m-1.8m, the width of the second girder top board is 4.0m-4.4m, the thickness of the second girder top board is 36mm-40mm, the
The width of two kingpost baseplates is 2.4m-3.8m, and the thickness of the second kingpost baseplate is 36mm-40mm, the straight web of the second girder and the
The thickness of two girder skew web plate is 14mm-20mm；The height of the 3rd girder 3 is 0.5m-1.5m, the width of the 3rd girder top board
For 3.0m-3.2m, the thickness of the 3rd girder top board is 36mm-40mm, and the width of the 3rd kingpost baseplate is 1.0m-2.3m, the 3rd
The thickness of kingpost baseplate is 36mm-40mm, and the thickness of the straight web of the 3rd girder and the 3rd girder skew web plate is 14mm-20mm.
In the present embodiment, all using high-strength low-alloy structural steel, strength grade is Q370qD to three road girders, certainly, some other
Can also be from the more excellent material of performance in embodiment.
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art is no
Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technology in the art
It is available that personnel pass through logical analysis, reasoning, or a limited experiment under this invention's idea on the basis of existing technology
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of space trident beam string foot bridge is it is characterised in that include the first girder, the second girder and the 3rd girder, institute
The one end stating the first girder, described second girder and described 3rd girder is the end that crosses, described first girder, described second girder
It is intersected in the node that crosses with the end that crosses of described 3rd girder, described first girder, described second girder and described 3rd girder
The other end be supported end, the supported end of described first girder, described second girder and described 3rd girder passes through first respectively
Hold-down support, the second hold-down support and the 3rd hold-down support are supported on abutment；With described second girder in the middle part of described first girder
Be provided with the first drag-line between middle part, in the middle part of described second girder and in the middle part of described 3rd girder between be provided with the second drag-line, described
It is provided with the 3rd drag-line between in the middle part of 3rd girder and in the middle part of described first girder；The side wall of the described node that crosses is provided with three ears
Plate, three described otic placodes are respectively the first otic placode, the second otic placode and third ear plate, and it is main that described first otic placode is arranged at described first
Beam and described second girder intersection cross on the wall of node side, and described second otic placode is arranged at described second girder and described the
Three girder intersections cross on the wall of node side, and described third ear plate is arranged at described 3rd girder and is crossed with described first girder
Place crosses on the wall of node side；Be provided with first connecting rod between described first otic placode and described first drag-line, described second otic placode with
It is provided with second connecting rod between described second drag-line, between described third ear plate and described 3rd drag-line, be provided with third connecting rod.
2. space according to claim 1 trident beam string foot bridge is it is characterised in that inside described first girder span centre
It is provided with the first anchor structure, be provided with the second anchor structure inside described second girder span centre, set inside described 3rd girder span centre
There is the 3rd anchor structure；The two ends of described first drag-line are anchored in described first anchor structure and described second anchor structure respectively
On, the two ends of described second drag-line are anchored on described second anchor structure and described 3rd anchor structure respectively, and the described 3rd
The two ends of drag-line are anchored on described 3rd anchor structure and the first anchor structure respectively.
3. space according to claim 2 trident beam string foot bridge it is characterised in that described first drag-line, described
Two drag-lines and described 3rd drag-line are parallel steel stranded wire drag-line, and described first drag-line, described second drag-line and the described 3rd draw
Rope carries out tensioning after installing.
4. space according to claim 1 trident beam string foot bridge it is characterised in that described first drag-line, described
It is respectively equipped with the first drag-line inflection point, the second drag-line inflection point and the 3rd drag-line inflection point on two drag-lines and described 3rd drag-line,
Described first drag-line inflection point is provided with the first steering gear, and described second drag-line inflection point is provided with the second steering gear, and described
Three drag-line inflection points are provided with the 3rd steering gear；Described first connecting rod, described second connecting rod and described third connecting rod are equipped with
End articulated section and lower end articulated section；The upper end articulated section of described first connecting rod, described second connecting rod and described third connecting rod is respectively
Hinged with described first otic placode, described second otic placode and described third ear plate, described first connecting rod, described second connecting rod and described
The upper end articulated section of third connecting rod all can rotate in vertical guide；Described first connecting rod, described second connecting rod and described third connecting rod
Lower end articulated section hinged with described first steering gear, described second steering gear and described 3rd steering gear respectively, described first
The lower end articulated section of connecting rod can be in the upper end articulated section structure of two anchor points at described first drag-line two ends and described first connecting rod
Rotate in the space plane becoming, the lower end articulated section of described second connecting rod can in two anchor points at described second drag-line two ends and
Rotate in the space plane that the upper end articulated section of described second connecting rod is constituted, the lower end articulated section of described third connecting rod can be described
Rotate in the space plane that the upper end articulated section of two anchor points at the 3rd drag-line two ends and described third connecting rod is constituted.
5. space according to claim 4 trident beam string foot bridge it is characterised in that described first connecting rod, described
Two connecting rods and described third connecting rod are conventional reinforcing pull rod.
6. according to the arbitrary described space trident beam string foot bridge of claim 1-5 it is characterised in that described first girder
Length is 50m-56m, and the length of described second girder is 20m-24m, and the length of described 3rd girder is 12m-15m；Described
One girder and angle on horizontal plane for described second girder are 130 ° -140 °, and described second girder is main with the described 3rd
Angle on horizontal plane for the beam is 100 ° -110 °, and described 3rd girder and described first girder are on horizontal plane
Angle is 110 ° -120 °.
7. space according to claim 6 trident beam string foot bridge it is characterised in that described first girder, described
The section of two girders and described 3rd girder by together with top board, together base plate, twice skew web plate, twice straight web composition.
8. space according to claim 7 trident beam string foot bridge is it is characterised in that the span centre of described first girder sets
Put a TMD antivibrator, the span centre of described second girder arranges the 2nd TMD antivibrator, and a described TMD antivibrator is arranged at institute
State the first main beam section central authorities at base plate, it is close that described 2nd TMD antivibrator is arranged at described second main beam section central authorities
At base plate, the weight sum of a described TMD antivibrator and described 2nd TMD antivibrator is described space trident beam string People's Bank of China
The 1.0%-2.0% of the gross weight of bridge.
9. space according to claim 8 trident beam string foot bridge is it is characterised in that described first main depth of beam is
0.5m-2.1m, the width of described first girder top board is 5.0m-5.4m, the thickness 36mm-40mm of described first girder top board,
The width of described first kingpost baseplate is 2.4m-4.9m, and the thickness of described first kingpost baseplate is 36mm-40mm, described first
The thickness of the straight web of girder and described first girder skew web plate is 14mm-20mm；Described second main depth of beam is 0.5m-
1.8m, the width of described second girder top board is 4.0m-4.4m, and the thickness of described second girder top board is 36mm-40mm, described
The width of the second kingpost baseplate is 2.4m-3.8m, and the thickness of described second kingpost baseplate is 36mm-40mm, described second girder
The thickness of straight web and described second girder skew web plate is 14mm-20mm；Described 3rd main depth of beam is 0.5m-1.5m,
The width of described 3rd girder top board is 3.0m-3.2m, and the thickness of described 3rd girder top board is 36mm-40mm, the described 3rd
The width of kingpost baseplate is 1.0m-2.3m, and the thickness of described 3rd kingpost baseplate is 36mm-40mm, the straight abdomen of described 3rd girder
The thickness of plate and described 3rd girder skew web plate is 14mm-20mm.
10. space according to claim 3 trident beam string foot bridge is it is characterised in that described first hold-down support, institute
State the second hold-down support and described 3rd hold-down support is the bearing of 7MN；Described first drag-line, described second drag-line and described
3rd drag-line carries out tensioning stretching force after installing is 0.2-0.3 times of described parallel steel stranded wire drag-line tensile strength.
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| CN201610008350.1A CN105463979B (en) | 2016-01-07 | 2016-01-07 | Space trident beam string foot bridge |
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| CN105463979B true CN105463979B (en) | 2017-03-08 |
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| CN106337371B (en) * | 2016-11-16 | 2018-02-06 | 上海市城市建设设计研究总院（集团）有限公司 | Using the three beam intersecting sites and its manufacture method of the steel box-girder in single Room section of case three |
| CN109868724B (en) * | 2019-04-04 | 2024-06-04 | 同济大学建筑设计研究院(集团)有限公司 | Double-fold-line bridge span assembly for cable stiffening |
| CN110258776B (en) * | 2019-07-24 | 2024-05-14 | 陈菲 | Prestressed bridge and manufacturing method and application thereof |
| CN111608065B (en) * | 2020-04-27 | 2021-08-17 | 江苏华通工程检测有限公司 | Three-leaf rose-line-shaped concrete filled steel tube flying swallow type cable-stayed arch bridge and construction method |
| CN113481825B (en) * | 2021-07-21 | 2023-02-28 | 上海市政工程设计研究总院（集团）有限公司 | Large-span bridge structure of Y-shaped girder |
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| FI95305C (en) * | 1992-11-25 | 1996-01-10 | Jari Ruusunen | Construction method |
| CN201534946U (en) * | 2009-09-30 | 2010-07-28 | 成都市武侯专利咨询研发转化研究所 | Overpass with platform bridge on junction of three roads |
| CN201873916U (en) * | 2010-07-19 | 2011-06-22 | 张航 | Simple three-branch road interchange overpass |
| CN204266107U (en) * | 2013-11-14 | 2015-04-15 | 天津城建设计院有限公司 | A kind of three dimensions steel mesh main arch cross section |
| CN205347960U (en) * | 2016-01-07 | 2016-06-29 | 上海市城市建设设计研究总院 | String roof beam foot bridge is opened to space trident |
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