SU823485A1 - Stationary bridge span - Google Patents

Description

(54) FIXED BRIDGE PART

I

The invention relates to bridge construction and can be used in supporting parts of bridges that are subject to significant dynamic effects.

The known supporting part of the bridge includes a ring-shaped arm, open at the top and bottom, and filled with an elastically compressible material, a base plate fixed in the span structure, mounted on an elastically compressible material and partially entering the hollow of the holder, between the lateral the walls of the base plate and the cage, and between the side walls of the cage and the recesses in the support has a gap filled with liquid 1.

A disadvantage of this support part is that it is necessary to seal the recess in the top of the support and to seal the open bottom of the sleeve to prevent liquid from getting inside it, which complicates the design of the support part.

Closest to the proposed technical essence and the achieved result is a fixed support

the part of the bridge, including the upper and lower balancers, made respectively in the form of the upper and lower support plates with protruding edges of which are facing each other and the outer side plates, hinge and damping device, and the edges of the balancers facing each other are made in the form of one after the other with gaps combs, and facing each other outer side plates are installed relative to each other with a gap on the ends, and the upper balancer is made in the lower part with annular edges, op mouths on the hinge, having a ring shape in plan and made of elastically compressible material, and the damping device is made of a viscous material that fills the gaps between the ribs of the combs 2. The lack of a supporting part is the small stability of the sticking oscillations due to temperature-dependent variations ambient air viscous properties of the material, damping the dynamic effects on the supporting part.

Claims (2)

The purpose of the invention is to increase the stability of vibration damping. This goal is achieved by the fact that in the fixed bearing part of the bridge, including the upper and lower balancers, respectively made in the form of the upper and lower support plates with protruding edges facing each other and the outer side plates, the hinge and damping device facing each other each other, the end sections of each of the pairs of outer side plates of the upper and lower balancers are set to overlap each other with a gap, and are made in the areas of their mutual overlap with holes, damping the The method is in the form of clamping elements and friction plates, each of which is placed in the gap between the corresponding pair of outer plates and has openings coaxial with openings in these plates, each clamping element is designed as a spring-loaded high-strength bolt with nut and tongs mounted in coaxial openings the corresponding pair of outer and friction plates, the outer plates being fixed in the upper and lower support plates by means of detachable joints, the hinge is designed as an axis, and each other, the ribs of the upper and lower base plates are rotatably fixed on this axis. At the same time, in the fixed support part, coaxial holes in the outer side and friction plates can be made in the form of cuts outlined along an arc of a circle with a center along the axis of the hinge. FIG. 1 shows the supporting part, view along the facade of the bridge; in fig. 2 shows section A-A in FIG. 1. The fixed support part contains upper and lower balancers, made, respectively, in the form of the upper 1 and lower 2 base plates with ribs 3 protruding from them and facing each other, and outer lateral plates 4 and 5, made in the form of an axis hinge 6 and damping device made in the form of friction plates 7 and clamping elements, each of which is made in the form of a spring-loaded high-strength 8 with a nut 9 and shields 10. The end sections of each of the pairs of outer side plates 4 and 5 of the upper and lower faces facing each other its balancers are installed extending one behind the other with a gap, and in the areas of their mutual overlap, holes 11 are made, and each friction plate 7 is placed in the gap between the corresponding pair of outer plates 4 and 5 and has holes that are coaxially with holes 11 in these plates. High-strength bolts 8 are spring-loaded springs 12 and are installed in coaxial holes 11 of the corresponding pair of outer 4 and 5 and friction 7 plates, and the outer plates 4 and 5 are fixed in the upper 1 and lower 2 support plates by means of detachable joints 13, ensuring reciprocal replacement of friction plates 7 along as they wear. Facing each other, the ribs 3 of the upper and lower base plates 1 and 2 are rotatably fixed on the axle 6, which is designed as an axis. The coaxial holes 11 in the outer side plates 4 and 5 and in the friction plates 7 can be made in the form of slots along an arc of a circle centered on the axis of the joint 6. The fixed support part works as follows. Under the influence of dynamic load, the span 14 oscillates, turning around the joint 6. In this case, the outer plates 4 and 5 move relative to each other. To prevent wear of the outer plates 4 and 5 and to increase the damping capacity of the bearing part, the friction plates 7 can be made, for example, in the form of a Ferrado tape mounted on only ON of the outer plates 4 or 5 of each pair. The damping is controlled by varying the tension of the high-strength bolts 8. The support part reduces the amplitude of oscillations and increases their damping rate, thereby increasing the durability of the bridge span structures. The support part can be used in bridges with both split and continuous spans. Claims 1. Fixed supporting part of the bridge. including upper and lower balancers, made respectively in the form of upper and lower support plates with protruding edges facing each other and outer side plates, hinge and damping device, characterized in that, in order to increase the stability of damping, turned The end sections of each of the pairs of outer side plates of the upper and lower balancers are set to each other, which overlap each other with a gap, and are made in the areas of their mutual overlap with the holes, damping The device is made in the form of clamping elements and friction plates, each of which is placed in the gap between the corresponding pair of outer plates and has holes that are coaxial with holes in these plates, each clamping element is designed as a spring-loaded high-strength bolt with nut and washers installed in coaxial holes of the corresponding pair of outer and friction plates, with the outer plates fixed in the upper and lower support plates by means of detachable joints, the hinge is made in the form of an axis, and the ribs of the upper and lower base plates turned towards each other are rotatably fixed to this axis. 2. The support part according to claim 1, characterized in that the coaxial holes in the outer side and friction plates are made in the form of slots, outlined along an arc of a circle centered on the axis of the hinge. Sources of information taken into account in the examination 1. The patent of Germany No. 1784824, cl. 19 D 19/04, 1977. 2. Japanese Patent No. 53-45615, cl. 87 C 1, 1978. H hr 1 four ..7 2.