CN205804149U - Bridge rigid pulling force is put - Google Patents

Abstract

Bridge rigid pulling force is put, and to efficiently solve bridge negative reaction problem, and adapts to the vertical bridge of beam-ends to change in displacement, without changing within the projected life of bridge.Including being fixedly installed on the upper arm-tie of beam body longitudinal end, being fixedly installed on the anchor in Bridge Pier portion, and through top cap and the steel eyebar of pier stud, the upper end of steel eyebar, lower end are hinged by bearing pin and upper arm-tie, lower pulling plate respectively, and the bottom of steel eyebar is fixed with anchor and is connected.

Description

Bridge rigid pulling force is put

Technical field

This utility model relates to bridge, particularly to a kind of bridge rigid pulling force pendulum, it is possible to efficiently solve bridge negative anti- Power problem, and the most do not retrain the bridge length travel of normal operating condition, without changing within the projected life of bridge.

Background technology

Along with the fast development of our country's bridge construction, increasing Longspan Bridge is built, and is tied by bridge Configuration formula and the restriction of span arrangement, outstanding day by day in the negative reaction problem of Bearings In Bridge Design.

At present for medium and small span bridge, negative reaction of support is less, generally can use and arrange pulling force bearing and solve, as Spherical steel support, benzvalene form and laminated rubber bearing may be used as pulling force bearing, and board-like rubber tension compression bearing is less for pulling force Bridge, the bridge bigger to counter-force is then suitableeer with spherical tension bridle iron or benzvalene form pulling force bearing.But when negative reaction is bigger, Pulling force susceptor design is difficult, less economical.

For middle Longspan Bridge, when its negative reaction of support is relatively big, negative reaction problem can be solved to use counterweight mode. And for some Longspan Bridges, its negative reaction of support is very big, ballast district can be caused long according to conventional ballast mode, structure Structure complexity, less economical, and also during operation afterwards, the rod member maintenance in ballast district is extremely difficult.And it is strong in earthquake Spending higher region, too much ballast can increase seismic force, brings great difficulty to structure design.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of bridge rigid pulling force pendulum, to efficiently solve bridge Negative reaction problem, and adapt to the vertical bridge of beam-ends to change in displacement, without changing within the projected life of bridge.

It is as follows that this utility model solves the technical scheme that its technical problem used:

Bridge rigid pulling force of the present utility model is put, and it is characterized in that: include being fixedly installed on the pull-up of beam body longitudinal end Plate, be fixedly installed on the anchor in Bridge Pier portion, and through top cap and the steel eyebar of pier stud, the upper end of steel eyebar, under End is hinged by bearing pin and upper arm-tie, lower pulling plate respectively, and the bottom of steel eyebar is fixed with anchor and is connected.

The beneficial effects of the utility model are, structure has novelty, can be by beam-ends negative reaction by rigid tensile swing It is handed to pile foundation, adapts to the vertical bridge of beam-ends to change in displacement by the rotating function of bearing pin and steel eyebar simultaneously；Its structure Simply, stress is clear and definite, it is simple to install, and dimension is supported convenient, without changing within the projected life of bridge, save material usage.

Accompanying drawing explanation

This specification includes following two width accompanying drawings:

Fig. 1 is the mounting means schematic diagram of this utility model bridge rigid pulling force pendulum；

Fig. 2 is the structural representation of this utility model bridge rigid pulling force pendulum；

Component shown in figure and corresponding labelling: beam body 10, upper arm-tie 20, bearing pin 21, steel eyebar 22, lower pulling plate 23, anchor Be fixedly mounted with and put 24, Bridge Pier 30.

Detailed description of the invention

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Seeing figures.1.and.2, bridge rigid pulling force of the present utility model pendulum includes being fixedly installed on beam body 10 longitudinal end Upper arm-tie 20 and the anchor 24 being fixedly installed on Bridge Pier 30, and through top cap and the steel eyebar 22 of pier stud.Steel The upper end of eyebar 22, lower end are hinged by bearing pin 21 and upper arm-tie 20, lower pulling plate 23 respectively, and the bottom of steel eyebar 22 fills with anchoring Put 24 fixing connections.

With reference to Fig. 1, upper arm-tie 21 is attached by welding manner with beam body 10, lower pulling plate 24 pass through anchor 25 and Bridge Pier 30 connects.When counter-force upwards occurs in beam-ends, the pulling force born can be transferred to bridge by rigid tensile pendulum device Beam pier 30.When beam body 10 produces length travel, rigid tensile pendulum can be by being connected to the eyebar 22 of bearing pin 21, upper arm-tie 20 and the freely rotatable length travel adapting to beam body 10 of lower pulling plate 23.

Compared with conventional stayed-cable bridge structure system, this utility model can preferably solve the negative reaction of its limit bearing and ask Topic, by this bridge rigid pulling force pendulum device, it is possible to pulling force at bearing is effectively transferred to pile foundation, and can pass through The rotation of bearing pin adapts to the length travel of bridge under normal operating condition, without changing in the life cycle of bridge, and its structure Making rationally, safe and reliable, dimension is supported convenient, can save lot of materials, good economy performance.

The technical solution of the utility model is successfully applied to agricultural road, Zhengzhou City express passway engineering Zheng by the applicant In the design of Beijing University's bridge.Zheng north bridge is two-way ten lane road cable-stayed bridges, and bridge crosses over Zhengzhou Bei Classification Station, oblique angles 88 °, using only tower steel-concrete connecting beam cable-stayed bridge of span 221+221m, bridge width 43.0m, girder uses steel-mixed combination beam body System, bridge tower is armored concrete H type bridge tower, and basis uses cast-in-situ bored pile.

Girder uses steel-mixed bondbeam, and bridge floor is wide 43 meters, two-way 10 tracks.Cable stayed Bridge Main Tower uses armored concrete H type Sarasota, tower height 150m, the wherein above tower height of bridge floor about 118.5m, bridge floor following tower height about 31.5m, overhead width 56m, at the bottom of tower Wide 60m.Suspension cable uses zinc-plated parallel steel wire suspension cable, and at bridge floor, suspension cable sets external antivibrator.

Cable-stayed bridge main-beam is the bondbeam of girder steel and the common stress of concrete slab, both is combined with WELDING STUDS.Bondbeam High 2.6m at suspension cable anchoring, span centre height 3.5m, bridge deck concrete thickness of slab 26cm.Steel girder section is box-type section, direction across bridge Center distance 37.5m of two steel girders, full-bridge is provided with 113 crossbeams altogether, is 4m along bridge to spacing, uses welding I-section to cut Face, standard horizontal beams top board sectional dimension is 700 × 24mm, base plate sectional dimension be 700 × 32mm (near main longitudinal grider 500 × 24mm), web plate section a size of (2600～3184) × 16mm, middle bridge panel is divided into pre-erection and cast-in-place part, prefabricated Part uses C60 concrete, and cast-in-place part uses C60 slightly expanded concrete.Floorings use longitudinal prestressing system, and full-bridge sets Put 8 elongated steel strand wires of Φ S15.2-12, additionally in the bridge deck concrete plate in the range of handing-over pier 133m, arrange 40 Φ S15.2-12 prestress wire.

For eliminating handing-over pier negative reaction, concrete ballast near handing-over pier is used to put, with arranging pulling force, the mode combined. Ballast district is positioned near handing-over pier pier top between crossbeam, along bridge ballast 293.5kN/m in the range of 12m, monolithic saddle weight 27.95kN, end bay arranges 126 pieces, and full-bridge amounts to 252 pieces, gross weight 7043.4kN.Crossbeam and ballast stringer form " well " Word grid, places ballast concrete block.

Pulling force pendulum uses Q500qE steel, pulling force pendulum top to connect two blocks of 32mm slab steel plates, and middle steel eyebar uses one Block 50mm steel plate, lower anchoring uses two blocks of 32mm steel plates, pulling force pendulum to be mounted in handing-over pier pier stud diaphragm plate.

This bridge uses Novel structure system of the present utility model, compared with conventional stayed-cable bridge structure system, and can be preferable Solve the negative reaction problem of its limit bearing and the problem that lateral seismic effect is excessive.Under normal circumstances frequently with concrete saddle weight Eliminate limit negative reaction of support, but saddle weight can increase lateral seismic effect, unfavorable to abutment pier antidetonation.

Use under this utility model axle casing entirety vertical rigidity increase 3.6%, vertical static live load effect vertical at the bottom of bridge tower tower To moment of flexure reduction 3.9%, suspension cable Fatigue Stress Amplitude reduction 1.1%, hawser power reduction 15.4%, beam-ends ballast concrete block Reduce 900 tons.

In sum, use Novel structure body of the present utility model, structure entirety vertical rigidity can be effectively improved, improve knot Structure stress performance, reduces geological process thus reduces handing-over pier size, and can realize economy and the most optimal height of stress performance Degree is unified.

Some principles of the above this utility model bridge rigid pulling force pendulum that simply explains through diagrams, are not intended to this Utility model is confined in shown and described concrete structure and the scope of application, therefore every corresponding amendment being likely utilized And equivalent, belong to the apllied the scope of the claims of this utility model.

Claims (1)

1. bridge rigid pulling force pendulum, is characterized in that: includes being fixedly installed on the upper arm-tie (20) of beam body (10) longitudinal end, fix It is arranged on the anchor (24) in Bridge Pier (30) portion, and through top cap and the steel eyebar (22) of pier stud, steel eyebar (22) Upper end, lower end hinged by bearing pin (21) and upper arm-tie (20), lower pulling plate (23) respectively, the bottom of steel eyebar (22) and anchoring Device (24) is fixing to be connected.