SU990935A1 - Earthquake-proof bridge - Google Patents

Description

The invention relates to bridge construction and can be used in bridges constructed in seismic regions.

A seismic resistant bridge is known, including supports, a span, supporting parts, each supporting part being in the form of upper and lower balancers, between which a rubber-metal gasket C1 is arranged in a conical groove in the lower balance bar.

The disadvantage of this earthquake-resistant bridge is the transfer to the superstructure of a significant horizontal seismic impact with a small amount of movement of the superstructure, which can lead to its damage. The closest to the invention in technical essence and the achieved effect is an earthquake-resistant bridge including: equipped with spacers;: beams split span structures of support with a 1-bolt located with gaps relative to the ends of adjacent span structures, supporting parts, and the bridge is equipped with tangential pillows reinforced on the ends of adjacent superstructures facing the wall of an i-shaped bolt, and by passing through jacks of adjacent span structures and a wall of corresponding bolts supports and fixed on the above-mentioned jacking beams, while the supporting parts are located under the jacking beams and are made of tangential type 2.

A disadvantage of the known earthquake-resistant bridge is the relatively low efficiency of damping the bridge's vibrations under seismic effects.

The purpose of the invention is to increase the efficiency of damping of bridge oscillations under seismic effects.

20

This goal is achieved by the fact that in an earthquake-resistant bridge, including split span structures equipped with jacking beams, supports with an i-bolt located

25 with gaps relative to the ends of adjacent spans, supporting parts, each supporting part is made in the form of hooks bent upwards and bent downward, reinforced in a chessboard, respectively, on the wall

J. -shaped crossbar of the corresponding support and on the jacking beam facing to it of the corresponding span, and a system of inclined suspensions in the form of a zigzag continuous cable, located in the corresponding gap and successively bending around the hooks mounted on the wall of the support-shaped crossbar of the support and facing it Household span of the span.

FIG. 1 shows a bridge with a shore and intermediate supports. general form; see 2 shows view A in FIG.

The seismic resistant bridge includes shore 1 and intermediate 2 supports having an integrated i-shaped crossbar 3, fitted with jack beams 4 split span structures 5 located with gaps relative to the walls of crossbars 3 of supports, and supported on the latter by means of supporting parts, each of which is made in the form The 7 hooks bent up and down and bent down, staggered, respectively, on the wall of a 1-bolt, 3 pillars on the jack beam 4 of the corresponding span 5, facing it, and the frame onnyh suspension 8 in the form of a continuous zigzag wire rope disposed in the respective gap between the wall of the beam and spans and sequentially enveloping hook b and 7, on the wall of the fortified 1 Riegel-shaped support and facing thereto jacking beam 4 corresponding span.

Seismic bridge works as follows.

Under seismic action, support 1 or 2 with bolt 3 moves in a horizontal direction, while the systems of inclined hangers 8 provide a significant quenching of the energy of seismic shocks, as a result of which the span structures suspended by means of these systems of inclined hangers with an integrated bolt 3 of supports 1 and 2 experience less seismic effects

oscillations in all directions.

The use of the invention will ensure effective damping of the bridge oscillations and will increase the reliability of operation of such structures during their construction in seismic regions.

Claims (2)

1. USSR author's certificate number 57.9317 ,. cl. E 01 O 19/04, 1976. 2. Kartsivadze G.N. Seismic resistance of road artificial structures. M., Transport, 1974, p.134, fig. U.-14 (prototype). about 1 | A / E A Ju - // Rig. Z 7