CN205443902U - Half meter style of calligraphy cable -stay bridge - Google Patents

Abstract

The utility model discloses a half meter style of calligraphy cable -stay bridge, through set up the down tube between girder and cable support tower, the down tube has a common extreme point with girder and cable support tower, and the surface all sets up the anchor eye about the down tube, and down tube upper surface anchor eye and cable support tower are connected with the upper portion suspension cable, and down tube lower surface anchor eye and girder are connected with the lower part suspension cable, and the lower part suspension cable is lighter than 180 rather than the interior contained angle that neighbouring upper portion suspension cable formed. The utility model discloses a half meter style of calligraphy cable -stay bridge effectively reduces the tower height, reduces the axle power of girder, and down tube disconnection cable has effectively restrained the natural vibration range of cable, has reduced the fatigue of suspension cable, the anti -torque capacity and the anti -wind stability of girder have been increased.

Description

Half meter of font cable-stayed bridge

Technical field

This utility model 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, main span exceedes generally cable-stayed bridge and two kinds of bridge types of suspension bridge of km.Compare from bridge integral rigidity, under same span, cable-stayed bridge is better than suspension bridge, but in terms of span ability, suspension bridge is better than cable-stayed bridge, the key point that restriction cable-stayed bridge span increases further is: along with span increases, the maximum axial pressure that stiff girder is born 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 use independent drag-line arrangement form, suspension cable needed for lower floor's bridge floor is reserved steel thimble from upper strata and is passed, 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 greatly 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 bridge tower rupture, reduction bridge service life.

Summary of the invention

For the problems referred to above, this utility model provides a kind of half meter of font cable-stayed bridge, by setting up brace between girder and Sarasota, increases bottom suspension cable anchoringwire Liang Jiao on girder, reduce suspension cable axial thrust load on girder direction, thus reduce 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, and can effectively reduce tower height.

This utility model 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 bottom suspension cable (31) and top suspension cable (32) suspension cable (3)；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 °.Act on the load on girder (2) and follow 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；The suspension cable level inclination being anchored on brace (7) increases, and reduces the compressive stress of girder.

Further technical scheme of the present utility model is: Sarasota (1) both sides arrange two braces (7), Sarasota and two braces has a common end points, two braces to form " V " font, and symmetrical about Sarasota (1).

Further technical scheme of the present utility model is: brace (7) upper surface, lower surface anchor hole symmetrical about brace (7).

Further technical scheme of the present utility model 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, the other end is fixing with Sarasota (1) to be connected, and linking beam (6) upper surface arranges anchor hole；It is positioned at brace (7) the upper surface anchor hole above Sarasota anchor hole and the homonymy linking beam of linking beam (6) top and described linking beam upper surface anchor hole passes through top suspension cable (32) and is sequentially connected with；It is positioned at brace (7) the upper surface anchor hole below anchor hole and the linking beam described in homonymy of linking beam (6) lower section to pass through top suspension cable (32) and be sequentially connected with；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；The anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) 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 °.

Further technical scheme of the present utility model 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 beneficial effects of the utility model are:

1, by the supporting role of brace, increase bottom suspension cable anchoringwire Liang Jiao on girder, reduce suspension cable axial thrust load on girder direction, thus reduce the axle power of girder；

2, the Suo Liang angle of brace top suspension cable reduces, and can 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 required Hanging Basket of stretch-draw at the bottom of the work platforms needed for stretch-draw or beam, reduces working measure expense, accelerate construction speed.

5, part suspension cable intersection is oblique is anchored on brace, adds torsional rigidity and the wind loading rating of whole bridge of girder.

6, by brace, cable tension can be carried out secondary and adjust 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 force analysis figure at half meter of font cable-stayed bridge main-beam anchor point；

Fig. 6 is that half meter of font cable-stayed bridge is schemed with prior art angle contrast.

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

This utility model is illustrated by 1-6 and embodiment 1-4 below in conjunction with the accompanying drawings.

In conjunction with Fig. 1-6, Force principle of the present utility model is illustrated:

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 illustrates as it is shown in figure 5, m₂G is the vertical load that girder is transferred to drag-line, H₂For the Suo Li of bottom suspension cable, α₂For the Suo Liang angle of bottom suspension cable, its value is more than Suo Liang the angle α, F of conventional cable-stayed bridge correspondence drag-line_{Axle 2}The axial force of girder is passed to for single suspension cable, and control axle power F of girder_{Max, 2}Superposition for girder sections axle power.Wherein:

$H_2=\frac{m_{2}g}{{\mathrm{sim\α}}_2}$

F_{Max, 2}=∑ F_{Axle 2}

Compared with conventional cable-stayed bridge, due to Suo Liang angle α₂Increase, drag-line passes to axial compressive force F of girder_{Axle 2}Reduce, and then control axle power F of girder_{Max, 2}Also 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 bottom suspension cable (31) and top suspension cable (32) suspension cable (3)；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, the anchor hole of brace (7) upper surface and Sarasota (1) are sequentially connected with by top suspension cable (32), the anchor hole of brace (7) lower surface and girder (2) 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 (α₁＜ α) 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 bottom suspension cable (31) and top suspension cable (32) suspension cable (3), 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, the anchor hole of brace (7) upper surface and Sarasota (1) are sequentially connected with by top suspension cable (32), the anchor hole of brace (7) lower surface and girder (2) 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 (α₁＜ α) 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 bottom suspension cable (31) and top suspension cable (32) suspension cable (3)；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 brace (7) the upper surface anchor hole above Sarasota anchor hole and the homonymy linking beam of linking beam (6) top and described linking beam upper surface anchor hole passes through top suspension cable (32) and is sequentially connected with；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 (α₁＜ α) 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 bottom suspension cable (31) and top suspension cable (32) suspension cable (3)；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 brace (7) the upper surface anchor hole above Sarasota anchor hole and the homonymy linking beam of linking beam (6) top and described linking beam upper surface anchor hole passes through top suspension cable (32) and is sequentially connected with；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 (α₁＜ α) 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.

Embodiment 1-4 and the parameter comparison such as following table of 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 bottom suspension cable (31) and top suspension cable (32) suspension cable (3)；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 °.

Half meter of font cable-stayed bridge the most 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).

Half meter of font cable-stayed bridge the most according to claim 1, it is characterised in that described brace (7) upper surface, lower surface anchor hole symmetrical about brace (7).

Half meter of font cable-stayed bridge the most 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, the other end is fixing with Sarasota (1) to be connected, and linking beam (6) upper surface arranges anchor hole；It is positioned at brace (7) the upper surface anchor hole above Sarasota anchor hole and the homonymy linking beam of linking beam (6) top and described linking beam upper surface anchor hole passes through top suspension cable (32) and is sequentially connected with；It is positioned at brace (7) the upper surface anchor hole below anchor hole and the linking beam described in homonymy of linking beam (6) lower section to pass through top suspension cable (32) and be sequentially connected with；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；The anchor hole of brace (7) lower surface passes sequentially through bottom suspension cable (31) with homonymy girder (2) 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 °.

Half meter of font cable-stayed bridge the most 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.