SU1227764A1 - Suspension bridge - Google Patents

Description

one

This invention relates to bridge construction.

The purpose of the invention is to increase the stiffness of the bridge and reduce the material intensity of the stiffness beam.

FIG. 1 shows the facade of the bridge with a continuous reverse arch; in FIG. 2 and 3 are cross sections of the bridge, respectively, with reinforced concrete and metal back arch; in fig. 4 - the facade of the bridge with a lattice back arch; in fig. 5 is a cross section of the structure

The bridge includes anchor supports 1, pylons 2, carrier cables 3 in the level of which rigid reverse reinforced concrete arches 4 are located, connected to carrier cables 3. Suspension brackets 5 connect reverse reinforced concrete arches 4 to stiffening beam 6. Links 7 ensure the stability of the arches in the plane of the cables.

Rigid back arches 4 can be made in the form of lattice arched trusses, along which support cables 3 pass (see Fig. 4). Rigid back reinforced concrete arches 4 or arched trusses are crimped by carrying cables 3, each of which is located in the body of reinforced concrete arch 4 or in a corresponding arched truss.

The bridge, depending on the local: x conditions can be performed with a ride to the bottom, in the middle and on top. The connection of the cable and arches is achieved by means of locks or by monolithing (with the reinforced concrete variant) and ensures the compatibility of cable and arches movements. Reverse arched trusses may have carrier cables in one or both of them. The bridges of the proposed system can be single or multi-span. With

0

five

0

five

0

.

The back arch with pylon can be articulated or rigid (fixed), the stiffening beam can be included in the joint operation with the main arches.

The construction of this structure begins with the anchor supports and the supports of the pylons on which the carrier cable is mounted. Then, a hard reverse arch, suspensions, and a stiffening beam are assembled (concreted), and artificial control of the forces is carried out, the purpose of which is to ensure the design elevation of the driveway and to create the necessary level of initial stresses in the back arch.

With this installation sequence, this structure is characterized by a rational distribution of forces. The flexible cable, made of high-strength wire, carries a constant load and provides the necessary level of artificial adjustment efforts in the back arch, which provides deformative characteristics of the structure. Beam stiffness in this case provides work mainly on local load and can be made very easy.

The stiffness under the temporary load of the arched element connected to the cable turns out to be significantly greater than the stiffness of the suspension of the bridge of a conventional circuit with a similar consumption of material for the supporting elements. This is achieved due to a more rational consumption of material in the arched support element, as well as as a result of fixation of the carrier cable, which eliminates the change in its geometry under asymmetric temporary loads on the bridge.

2.

R

fig.Z

.

Tfffff fTTf

GM /

LU //

f / fff / ffff

0

Compiled by H, Getmanska Editor A. Lezhnin Tehred N. Bonkalo Corrector T. Kolb

,.,. “,.“ .- .. --- - - ---- - - -

Order 2271/32 Circulation 514Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Production and printing company, Uzhgorod, Projecto st., 4

FIG. five

Claims (1)

DANGEROUS BRIDGE, including anchor supports, pylons, load-bearing cables and a stiffener, connected to the load-bearing suspensions, characterized in that, in order to increase the stiffness of the bridge and reduce the material consumption of the stiffener, it is equipped with rigid reverse reinforced concrete arches or arch trusses, crimped load-bearing cables , each of which is placed in the body of a reinforced concrete arch or in the corresponding belt of an arch truss. <£> SU „„ 1227764 I 1227764