CN105648895A - Half-*-shaped cable-stayed bridge - Google Patents
Half-*-shaped cable-stayed bridge Download PDFInfo
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- CN105648895A CN105648895A CN201610123525.3A CN201610123525A CN105648895A CN 105648895 A CN105648895 A CN 105648895A CN 201610123525 A CN201610123525 A CN 201610123525A CN 105648895 A CN105648895 A CN 105648895A
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- cable
- brace
- anchor hole
- suspension cable
- sarasota
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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
- E01D11/04—Cable-stayed bridges
-
- 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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a half-*-shaped cable-stayed bridge. Inclined rods are arranged between a main beam and a cable bent tower. The inclined rods, the main beam and the cable bent tower share a common end point. Anchor holes are formed in the upper surface and the lower surface of each inclined rod. The anchor holes in the upper surface of each inclined rod and the cable bent tower are connected through upper stay cables. The anchor holes in the lower surface of each inclined rod and the main beam are connected through lower stay cables. The inner included angle formed by each lower stay cable and the upper stay cable adjacent to the lower stay cable is smaller than 180 degrees. By the adoption of the half-*-shaped cable-stayed bridge, the height of the tower is effectively reduced, the axial force of the main beam is reduced, the natural vibration amplitude of the stay cables is effectively restrained when the stay cables are broken through the inclined rods, and the fatigue of the stay cables is relieved; and the anti-torsion capacity and the anti-wind stability of the main beam are improved.
Description
Technical field
The invention belongs to a kind of cable-stayed bridge, particularly a kind of half meter of font cable-stayed bridge.
Background technology
Along with the development of Bridge Design building technology, what main span exceeded km is generally cable-stayed bridge and two kinds of bridge types of suspension bridge. Compare from bridge integral rigidity, under same span, cable-stayed bridge is better than suspension bridge, but in span ability, suspension bridge is better than cable-stayed bridge, the key point that restriction cable-stayed bridge span increases further is in that: along with span increases, the maximum axial pressure that stiff girder bears is excessive, and current material is difficult to bear; Along with span increases, bridge tower height increases, and drag-line drift increases, and amplitude is bigger.
In prior art, as Chinese patent CN104264579A devises a kind of self-anchored type suspension cable oblique pull co-operative system steel structure bridge, its girder is steel-structure box girder, reduces girder axle power by alleviating the deadweight of girder, but this structure bridge tower is higher, and girder weight capacity is poor; Chinese patent CN101215819B devises a kind of separated double-layer bridge-floor cable stayed bridge, this cable-stayed bridge includes upper strata girder, lower floor's girder, upper deck of bridge and lower floor's bridge floor adopt independent drag-line arrangement form, suspension cable needed for lower floor's bridge floor is reserved steel thimble traverse from upper strata, this cable-stayed bridge all drag-lines drift is longer, relatively big at vehicle pass-through and high wind effect downhaul amplitude, and the axle power of this structure cable-stayed bridge of Long span is bigger; Chinese patent CN104612032A devises a kind of big across tilting arch bridge pylon cable-stayed bridge, this cable-stayed bridge reduces bridge tower height by arranging curved Bridge, this bridge tower discontinuity, the power of vertical direction can not be passed to girder, long-time unbalance stress can cause that bridge tower ruptures, and reduces bridge service life.
Summary of the invention
For the problems referred to above, the invention provides a kind of half meter of font cable-stayed bridge, by setting up brace between girder and Sarasota, increase bottom suspension cable anchoringwire Liang Jiao on girder, reduce suspension cable axial thrust load on girder direction, thus reducing the axle power of girder; Reduce the drift of suspension cable, reduce the sag of suspension cable, add the rigidity of suspension cable, and solve the vibration problem of suspension cable; The Suo Liang angle of top suspension cable reduces, it is possible to effectively reduce tower height.
The present invention takes techniques below scheme to be attained in that
Half meter of font cable-stayed bridge includes Sarasota (1), girder (2), suspension cable (3), brace (7), brace (7) is arranged on Sarasota (1) both sides, having a common end points with girder (2) and Sarasota (1), brace (7) is divided into suspension cable (3) bottom suspension cable (31) and top suspension cable (32);Brace (7) upper surface, lower surface arrange anchor hole, girder (2) upper surface both sides and Sarasota (1) left and right sides arrange anchor hole, the anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) anchor hole and is connected, and the anchor hole of brace (7) upper surface passes sequentially through top suspension cable (32) with homonymy Sarasota (1) anchor hole and is connected; The within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��. The load acted on girder (2) follows following Path of Force Transfer: girder �� bottom suspension cable �� brace �� top suspension cable �� bridge tower �� basis; Brace (7) is as power transmission transition member, a piece elongated suspension cable of conventional cable-stayed bridge is divided into the drag-line that two sections of Suo Liang angles are different, reduce the drift of suspension cable (3), reduce the sag of suspension cable, add the rigidity of suspension cable, and reduce the vibration problem of suspension cable; It is anchored in the suspension cable level inclination on brace (7) to increase, reduces the compressive stress of girder.
The further technical scheme of the present invention is: Sarasota (1) both sides arrange two braces (7), Sarasota and two braces a common end points, and two braces form " V " font, and symmetrical about Sarasota (1).
The further technical scheme of the present invention is: brace (7) upper surface, lower surface anchor hole symmetrical about brace (7).
The further technical scheme of the present invention is: also include linking beam (6), linking beam (6) is horizontally set between Sarasota (1) and brace (7), linking beam (6) one end is fixing with brace (7) to be connected, and the other end is fixing with Sarasota (1) to be connected; Linking beam (6) upper surface arranges anchor hole, and the anchor hole method of attachment being positioned at linking beam (6), brace (7), Sarasota (1) and girder (2) is:
A, is positioned at the Sarasota anchor hole above linking beam (6) and brace (7) the upper surface anchor hole above homonymy linking beam and described linking beam upper surface anchor hole is sequentially connected with by top suspension cable (32);
B, is positioned at the anchor hole below linking beam (6) and brace (7) the upper surface anchor hole below linking beam described in homonymy is sequentially connected with by top suspension cable (32);
C, the anchor hole between anchor hole and two linking beams of homonymy and bottom linking beam upper surface anchor hole between two linking beams are sequentially connected with;
D, the anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) anchor hole and is connected;
E, the within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��.
The further technical scheme of the present invention is: brace (7) the lower surface anchor hole being positioned at bottom linking beam (6) top passes sequentially through bottom suspension cable (31) with girder (2) anchor hole of opposite side and is connected.
The invention has the beneficial effects as follows:
1, by the supporting role of brace, increasing bottom suspension cable anchoringwire Liang Jiao on girder, reducing suspension cable axial thrust load on girder direction, thus reducing the axle power of girder;
2, the Suo Liang angle of brace top suspension cable reduces, it is possible to effectively reduce tower height;
3, suspension cable is divided into two sections by brace, reduces the drift of suspension cable, reduces the sag of suspension cable, adds the rigidity of suspension cable, and reduces the vibration problem of suspension cable.
4, brace stretching oblique drag-line, eliminates on Sarasota the work platforms needed for stretch-draw or the required Hanging Basket of stretch-draw at the bottom of beam, reduces working measure expense, accelerate construction speed.
5, part suspension cable intersection is oblique is anchored on brace, adds the torsional rigidity of girder and the wind loading rating of whole bridge.
6, by brace, cable tension can be carried out secondary adjustment distribution, shorten and adjust rope construction period and practice.
Accompanying drawing explanation
Fig. 1 is the plane graph of half meter of font cable-stayed bridge;
Fig. 2 is half meter of font cable-stayed bridge plane graph with linking beam;
Fig. 3 is that bottom suspension cable adjacent top suspension cable forms within angle schematic diagram;
Fig. 4 is the axonometric chart of half meter of font cable-stayed bridge;
Fig. 5 is half meter of font cable-stayed bridge main-beam anchor point place force analysis figure;
Fig. 6 is half meter of font cable-stayed bridge and prior art angle contrast figure.
In figure: 1, Sarasota; 2, girder; 3, suspension cable; 31, bottom suspension cable; 32, top suspension cable; 4, pier; 5, bearing; 6, linking beam; 7, brace; 8, bottom suspension cable adjacent top suspension cable forms within angle.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-6 and embodiment 1-4, the present invention will be described.
Force principle in conjunction with-6 couples of present invention of Fig. 1 illustrates:
Force principle:
The stress of half meter of font cable-stayed bridge main-beam is similar with the main beam stress character of conventional cable-stayed bridge, and its stress diagram is as it is shown in figure 5, m2G is the vertical load that girder is transferred to drag-line, H2Suo Li, �� for bottom suspension cable2For the Suo Liang angle of bottom suspension cable, its value is more than Suo Liang angle ��, the F of conventional cable-stayed bridge correspondence drag-lineAxle 2The axial force of girder is passed to for single suspension cable, and the control axle power F of girderMax, 2Superposition for girder sections axle power. Wherein:
FMax, 2=�� FAxle 2
Compared with conventional cable-stayed bridge, due to Suo Liang angle ��2Increase, drag-line passes to the axial compressive force F of girderAxle 2Reduce, and then the control axle power F of girderMax, 2Also can reduce, it is possible to effectively solve cable-stayed bridge and control the problem that axle power is excessive.
Embodiment 1:
Embodiment 1 is a kind of half meter of font cable-stayed bridge, as shown in Figure 1, comprise 2 Sarasotas (1), 1 girder (2), 320 suspension cables (3), 4 braces (7), 1 pier (4), 2 bearings (5), span 800 meters. brace (7) is arranged on Sarasota (1) both sides, having a common end points with girder (2) and Sarasota (1), brace (7) is divided into suspension cable (3) bottom suspension cable (31) and top suspension cable (32), brace (7) is hollow section, hollow parts meets the space needed for suspension cable symmetry tension operation, 80 anchor holes of brace (7) upper and lower surface asymmetric distribution, the girder (2) of homonymy is corresponding with Sarasota (1) both sides distributed 160 anchor holes, anchor hole and the Sarasota (1) of brace (7) upper surface are sequentially connected with by top suspension cable (32), anchor hole and the girder (2) of brace (7) lower surface are sequentially connected with by bottom suspension cable (31), the within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��, the Suo Liang angle of bottom suspension cable increases by more than 11 ��, and drag-line (3) passes to the axial compressive force of girder (2) and reduces, and then the control axle power of girder (2) also can reduce, and efficiently solves cable-stayed bridge and controls the problem that axle power is excessive.
According to conventional design, the Suo Liang angle increasing lower floor's suspension cable can make tower height become big, and as shown in Figure 6, wherein H is the tower height of conventional cable-stayed bridge, H1Being the tower height of half meter of font cable-stayed bridge, top suspension cable corresponding to half meter of font cable-stayed bridge Suo Liang angle on floor stringer can reduce (��1< ��) so that tower height reduces, tower height is reduced to the 73% of conventional cable-stayed bridge. Girder anti-twisting property improves 12%, and wind resisting stability improves 16%, and drag-line peak swing is reduced to 8cm by 14cm, saves stretching construction platform and Hanging Basket more than 200 ten thousand yuan, 2 months reductions of erection time.
Embodiment 2:
Embodiment 2 is a kind of half meter of font cable-stayed bridge, as shown in Figure 1, comprise 2 Sarasotas (1), 1 girder (2), 320 suspension cables (3), 4 braces (7), 1 pier (4), 2 bearings (5), span 800 meters. brace (7) is arranged on Sarasota (1) both sides, a common end points is had with girder (2) and Sarasota (1), brace (7) is divided into suspension cable (3) bottom suspension cable (31) and top suspension cable (32), and brace (7) is symmetrical about Sarasota, brace (7) is hollow section, hollow parts meets the space needed for suspension cable symmetry tension operation, brace (7) upper and lower surface is symmetrical 80 anchor holes, the girder (2) of homonymy is corresponding with Sarasota (1) both sides distributed 160 anchor holes, anchor hole and the Sarasota (1) of brace (7) upper surface are sequentially connected with by top suspension cable (32), anchor hole and the girder (2) of brace (7) lower surface are sequentially connected with by bottom suspension cable (31), the within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��, the Suo Liang angle of bottom suspension cable increases by more than 12 ��, and drag-line (3) passes to the axial compressive force of girder (2) and reduces, and then the control axle power of girder (2) also can reduce, and efficiently solves cable-stayed bridge and controls the problem that axle power is excessive.
According to conventional design, the Suo Liang angle increasing lower floor's suspension cable can make tower height become big, and as shown in Figure 6, wherein H is the tower height of conventional cable-stayed bridge, H1Being the tower height of half meter of font cable-stayed bridge, top suspension cable corresponding to half meter of font cable-stayed bridge Suo Liang angle on floor stringer can reduce (��1< ��) so that tower height reduces, tower height is reduced to the 73% of conventional cable-stayed bridge. Girder anti-twisting property improves 14%, and wind resisting stability improves 16%, and drag-line peak swing is reduced to 7cm by 14cm, saves stretching construction platform and Hanging Basket more than 200 ten thousand yuan, 2 months reductions of erection time.
Embodiment 3:
Embodiment 3 is a kind of half meter of font cable-stayed bridge, as shown in Figure 2, comprise 2 Sarasotas (1), 1 girder (2), 600 suspension cables (3), 4 braces (7), 8 linking beams (6), 1 pier (4), two bearings (5), span 1500 meters. brace (7) is arranged on Sarasota (1) both sides, having a common end points with girder (2) and Sarasota (1), brace (7) is divided into suspension cable (3) bottom suspension cable (31) and top suspension cable (32), arranging 2 linking beams (6) between Sarasota (1) and brace (7), linking beam (6) one end is fixing with brace (7) to be connected, and the other end is fixing with Sarasota (1) to be connected, linking beam (6) and brace (7) are hollow section, hollow parts meets the space needed for suspension cable symmetry tension operation, on brace (7), lower surface distributed 150 anchor holes, two linking beam (6) upper surfaces between Sarasota (1) and brace (7) distributed 30 anchor holes, the girder (2) of homonymy is corresponding with Sarasota (1) both sides distributed 360 anchor holes, it is positioned at the Sarasota anchor hole above linking beam (6) and brace (7) the upper surface anchor hole above homonymy linking beam and described linking beam upper surface anchor hole is sequentially connected with by top suspension cable (32), brace (7) the upper surface anchor hole of the anchor hole and homonymy linking beam (6) lower section that are positioned at linking beam (6) lower section is sequentially connected with by top suspension cable (32), it is positioned at the anchor hole between two linking beams (6) and the anchor hole between two linking beams (6) of homonymy and bottom linking beam (6) upper surface anchor hole is sequentially connected with, the anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) anchor hole and is connected, and the within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��,The anchor-hold Suo Liang angle on girder (2) can be increased further due to the effect of brace, the Suo Liang angle of every skew cables increases by more than 9 ��, drag-line passes to the axial compressive force of girder and reduces, and then the control axle power of girder (2) also can reduce, efficiently solve cable-stayed bridge and control the problem that axle power is excessive.
According to conventional design, the Suo Liang angle increasing lower floor's suspension cable can make tower height become big, and as shown in Figure 6, wherein H is the tower height of conventional cable-stayed bridge, H1Being the tower height of half meter of font cable-stayed bridge, top suspension cable corresponding to half meter of font cable-stayed bridge Suo Liang angle on floor stringer can reduce (��1< ��) so that tower height reduces, tower height is reduced to the 81% of conventional cable-stayed bridge. Girder anti-twisting property improves 10%, and wind resisting stability improves 13%, and drag-line peak swing is reduced to 13cm by 20cm, saves stretching construction platform and Hanging Basket more than 500 ten thousand yuan, 4 months reductions of erection time.
Embodiment 4:
Embodiment 4 is a kind of half meter of font cable-stayed bridge, as shown in Figure 4, comprise 2 Sarasotas (1), 1 girder (2), 600 suspension cables (3), 4 braces (7), 8 linking beams (6), 1 pier (4), two bearings (5), span 1500 meters. brace (7) is arranged on Sarasota (1) both sides, having a common end points with girder (2) and Sarasota (1), brace (7) is divided into suspension cable (3) bottom suspension cable (31) and top suspension cable (32), arranging 2 linking beams (6) between Sarasota (1) and brace (7), linking beam (6) one end is fixing with brace (7) to be connected, and the other end is fixing with Sarasota (1) to be connected, linking beam (6) and brace (7) are hollow section, hollow parts meets the space needed for suspension cable symmetry tension operation, on brace (7), lower surface distributed 150 anchor holes, two linking beam (6) upper surfaces between Sarasota (1) and brace (7) distributed 30 anchor holes, the girder (2) of homonymy is corresponding with Sarasota (1) both sides distributed 360 anchor holes, it is positioned at the Sarasota anchor hole above linking beam (6) and brace (7) the upper surface anchor hole above homonymy linking beam and described linking beam upper surface anchor hole is sequentially connected with by top suspension cable (32), brace (7) the upper surface anchor hole of the anchor hole and homonymy linking beam (6) lower section that are positioned at linking beam (6) lower section is sequentially connected with by top suspension cable (32), it is positioned at the anchor hole between two linking beams (6) and the anchor hole between two linking beams (6) of homonymy and bottom linking beam (6) upper surface anchor hole is sequentially connected with, brace (7) the lower surface anchor hole being positioned at bottom linking beam (6) lower section passes sequentially through bottom suspension cable (31) with homonymy girder (2) anchor hole and is connected, brace (7) the lower surface anchor hole being positioned at bottom linking beam (6) top passes sequentially through bottom suspension cable (31) with girder (2) anchor hole of opposite side and is connected, and the within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��, the anchor-hold Suo Liang angle on girder (2) can be increased further due to the effect of brace, the Suo Liang angle of every skew cables increases by more than 8 ��, drag-line passes to the axial compressive force of girder and reduces, and then the control axle power of girder (2) also can reduce, efficiently solve cable-stayed bridge and control the problem that axle power is excessive.
According to conventional design, the Suo Liang angle increasing lower floor's suspension cable can make tower height become big, and as shown in Figure 6, wherein H is the tower height of conventional cable-stayed bridge, H1Being the tower height of half meter of font cable-stayed bridge, top suspension cable corresponding to half meter of font cable-stayed bridge Suo Liang angle on floor stringer can reduce (��1< ��) so that tower height reduces, tower height is reduced to the 81% of conventional cable-stayed bridge.Girder anti-twisting property improves 10%, and wind resisting stability improves 15%, and drag-line peak swing is reduced to 14cm by 20cm, saves stretching construction platform and Hanging Basket more than 500 ten thousand yuan, 4 months reductions of erection time.
The parameter comparison such as following table of embodiment 1-4 and prior art:
Claims (5)
1. half meter of font cable-stayed bridge, including Sarasota (1), girder (2), suspension cable (3), it is characterised in that also include brace (7); Brace (7) is arranged on Sarasota (1) both sides, having a common end points with girder (2) and Sarasota (1), brace (7) is divided into suspension cable (3) bottom suspension cable (31) and top suspension cable (32); Brace (7) upper surface, lower surface arrange anchor hole, girder (2) upper surface both sides and Sarasota (1) left and right sides arrange anchor hole, the anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) anchor hole and is connected, and the anchor hole of brace (7) upper surface passes sequentially through top suspension cable (32) with homonymy Sarasota (1) anchor hole and is connected; The within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��.
2. half meter of font cable-stayed bridge according to claim 1, it is characterized in that, Sarasota (1) both sides arrange two braces (7), Sarasota and two braces a common end points, two braces form " V " font, and symmetrical about Sarasota (1).
3. half meter of font cable-stayed bridge according to claim 1, it is characterised in that described brace (7) upper surface, lower surface anchor hole symmetrical about brace (7).
4. half meter of font cable-stayed bridge according to claim 1, characterized by further comprising linking beam (6), linking beam (6) is horizontally set between Sarasota (1) and brace (7), linking beam (6) one end is fixing with brace (7) to be connected, and the other end is fixing with Sarasota (1) to be connected; Linking beam (6) upper surface arranges anchor hole, and the anchor hole method of attachment being positioned at linking beam (6), brace (7), Sarasota (1) and girder (2) is:
A, is positioned at the Sarasota anchor hole above linking beam (6) and brace (7) the upper surface anchor hole above homonymy linking beam and described linking beam upper surface anchor hole is sequentially connected with by top suspension cable (32);
B, is positioned at the anchor hole below linking beam (6) and brace (7) the upper surface anchor hole below linking beam described in homonymy is sequentially connected with by top suspension cable (32);
C, the anchor hole between anchor hole and two linking beams of homonymy and bottom linking beam upper surface anchor hole between two linking beams are sequentially connected with;
D, the anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) anchor hole and is connected;
E, the within angle (8) that bottom suspension cable (31) adjacent top suspension cable (32) is formed is less than 180 ��.
5. half meter of font cable-stayed bridge with linking beam according to claim 4, it is characterized in that, brace (7) the lower surface anchor hole being positioned at bottom linking beam (6) top passes sequentially through bottom suspension cable (31) with girder (2) anchor hole of opposite side and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610123525.3A CN105648895A (en) | 2016-03-04 | 2016-03-04 | Half-*-shaped cable-stayed bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610123525.3A CN105648895A (en) | 2016-03-04 | 2016-03-04 | Half-*-shaped cable-stayed bridge |
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| CN105648895A true CN105648895A (en) | 2016-06-08 |
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| CN201610123525.3A Pending CN105648895A (en) | 2016-03-04 | 2016-03-04 | Half-*-shaped cable-stayed bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281623A (en) * | 2020-10-30 | 2021-01-29 | 上海市政工程设计研究总院（集团）有限公司 | Longitudinal V-shaped cable tower cable-stayed bridge |
-
2016
- 2016-03-04 CN CN201610123525.3A patent/CN105648895A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281623A (en) * | 2020-10-30 | 2021-01-29 | 上海市政工程设计研究总院（集团）有限公司 | Longitudinal V-shaped cable tower cable-stayed bridge |
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Application publication date: 20160608 |
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