CN104695323A

CN104695323A - Bridge damping support

Info

Publication number: CN104695323A
Application number: CN201310670215.XA
Authority: CN
Inventors: 汪穹立
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-04
Filing date: 2013-12-04
Publication date: 2015-06-10

Abstract

A bridge damping support comprises an upper support plate fixedly connected with a bridge body, and a lower support plate fixedly connected with a pier, wherein a middle sliding block with a spherical lower plate surface, an upper hemispherical turning block and a lower hemispherical turning block are arranged between the upper support plate and the lower support plate; a retainer ring is arranged on the periphery of the upper support plate; a limiting ring is arranged on the periphery of the upper plate surface of the lower support plate; the upper hemispherical turning block and the lower hemispherical turning block [5] are split; a damping spring is arranged between the upper hemispherical turning block and the lower hemispherical turning block. The bridge damping support reduces damage of a secondary internal force to a structure on the premise of meeting a daily temperature change displacement requirement of a bridge structure, and is reasonable in structure, safe and practical; the bridge damping support reduces damage of earthquake energy to the pier, and meets shock-isolating, energy-absorbing and damping functions during an earthquake; the bridge damping support facilitates conversion and consumption of kinetic energy and potential energy; the bridge damping support can significantly consume energy through shape change and has a better shock-absorbing effect.

Description

A kind of shock-absorbing bridge support

Technical field

The invention belongs to bridge technology field, specifically a kind of shock-absorbing bridge support.

Background technology

Bridge refers to the building for road crosses over natural or cultural obstacle and build.Bridge is generally made up of five large parts and five widgets, five large parts refer to that bridge bears spanning superstructure and the substructure of automobile or other vehicle transport loads, are the guarantees of bridge structure safe. comprise bridge span structure (or claim bridge opening structure. superstructure), bridge pad system, bridge pier, abutment, cushion cap dig a well or pile foundation.Five widgets refer to directly relevant with bridge service function parts, are called deck structure in the past. comprise deck paving, waterproof and water drainage system, railing, shrinkage joint, lighting. ^[2]large bridge accessory structure also has bridgehead, the settings such as access bridge.In bridge construction, bearing is set up on pier, the device of end face supporting bridge superstructure.Be the vitals connecting bridge superstructure and substructure, its function, for superstructure is fixed on pier, is born the various power acting on superstructure, and it is reliably passed to pier; Under load, temperature, concrete shrinkage and creep effect, bearing can adapt to corner and the displacement of superstructure, makes superstructure can Free Transform and do not produce extra additional internal force.The theory calculate that the structure of bridge pad should meet superstructure is graphic, as bearing pressure transmitted by a fixed point time, bearing should be designed to rotate and irremovable fixed bearing admissible structure end; As bearing pressure by a fixed point and act on certain direction transmit time, then should be designed to can rotate and mobile freely movable bearing.Bearing is the important load transfer device of bridge, considers that it has enough bearing capacities to ensure safe and reliable end reaction (vertical force and horizontal force) to be passed to substructure in design; Secondly bearing should be little of as much as possible the needs of the free-extension and rotation that adapt to beam body to the constraint of bridge deformation (displacement and corner), otherwise will second inner force be produced for its inside of statically-indeterminate structure, damage is caused to structure, greatly shortening structure application life.When running into earthquake especially earthquake magnitude being larger, the superstructure of bridge has certain displacement and speed relative to bridge pier, cause effect strong between beam body and bridge pier thus, if bearing does not have good damping, function of shock insulation, will larger infringement be caused to beam body and very likely cause the fracture at the bottom of pier and the generation of the beam accident that falls.Traditional friction pendulum vibration absorption and isolation support, extends by pendulum principle the object that natural vibration period of bridge achieves shock insulation; The friction of modified ultra-high molecular mass and corrosion resistant plate has certain power consumption effect, but friction factor is less, and damping effect is not obvious, and the requirement such as structure temperature variable displacement when cannot meet non-shake.

Summary of the invention

Object of the present invention is just to provide the good shock-absorbing bridge support of a kind of shock-resistant and energy-dissipating.

For achieving the above object, this invention takes following technical scheme: a kind of shock-absorbing bridge support, comprise the upper bracket plate 1 be fixedly connected with beam body, the lower support plate 6 be fixedly connected with bridge pier, middle slip block 2 and first sphere moving block 3 and second sphere moving block 5 that lower face is dome shape is provided with between upper bracket plate 1, lower support plate 6, the border of upper bracket plate 1 is provided with back-up ring 11, the upper face border of lower support plate 6 is provided with spacing ring 8; First sphere moving block 3 is Split type structure with second sphere moving block 5, is provided with damping spring 4 in the middle of it.

Owing to have employed technique scheme, a kind of shock-absorbing bridge support provided by the present invention, compared with prior art have the following advantages: one, to be provided with middle slip block 2 between the upper bracket plate 1 of this shock mount, lower support plate 6 and to coordinate with spacing ring 8, first sphere moving block 3, second sphere moving block 5 owing to forming and arrange, the damage of second inner force to works is also reduced while requiring, rational in infrastructure, safe and applicable at the day normal temperature variable displacement meeting bridge construction; They are two years old, owing to forming the upper face of lower support plate 1 of this shock-absorbing bridge support and the lower face of middle slip block 2 is sphere curved surface, first sphere moving block 3, second sphere moving block 5 are Split type structure, make first sphere moving block 3, second sphere moving block 5 can produce swing displacement, so that the conversion consumption between kinetic energy and potential energy, consume the energy that earthquake produces, cut down the destruction of seismic energy to pier, meet antidetonation isolation energy dissipating damping function during earthquake; They are three years old, because the subsequent corrosion forming lower support plate 6 upper face is greater than the subsequent corrosion of second sphere moving block 5 lower face be slidably connected with it, the spherical crown surface of first sphere moving block 3 upper face is greater than the spherical crown surface of middle slip block 2 lower face be slidably connected with it, thus first sphere moving block 3, second sphere moving block 5 face can produce swing displacement, so that the conversion consumption between kinetic energy and potential energy at upper bracket plate 1, lower support plate 6 plate; Its four, owing to being provided with damping spring 4 in the middle of first sphere moving block 3, second sphere moving block 5, deformation power consumption obviously and damping effect better.

Accompanying drawing explanation

Accompanying drawing is the concrete structure schematic diagram of shock-absorbing bridge support provided by the present invention.

Detailed description of the invention

Be described in further detail below in conjunction with the structure of accompanying drawing to a kind of shock-absorbing bridge support provided by the invention: a kind of shock-absorbing bridge support as shown in Figure 1, comprise the upper bracket plate 1 be fixedly connected with beam body, the lower support plate 6 be fixedly connected with bridge pier, middle slip block 2 and first sphere moving block 3 and second sphere moving block 5 that lower face is dome shape is provided with between upper bracket plate 1, lower support plate 6, the border of upper bracket plate 1 is provided with back-up ring 11, the upper face border of lower support plate 6 is provided with spacing ring 8; First sphere moving block 3 is Split type structure with second sphere moving block 5, is provided with damping spring 4 in the middle of it.Spacing ring 8 is fixedly connected with lower support plate 6 by bolt 7.The subsequent corrosion of lower support plate 6 upper face is greater than the subsequent corrosion of second sphere moving block 5 lower face be slidably connected with it.The spherical crown surface of first sphere moving block 3 upper face is greater than the spherical crown surface of middle slip block 2 lower face be slidably connected with it.The shock-absorbing bridge support of this structure, the effect of common bearing can be played on the one hand, by bridge upper load by upper bracket plate 1, lower support plate 6 and the middle slip block 2 be arranged between the two and first sphere moving block 3, second sphere moving block 5 passes to substructure uniformly, and at horizontal direction transverse axis vertical pivot to when being subjected to displacement, can adapt to by the flat frictional pair of the two deformation requirements that superstructure causes because of displacement and warm variable displacement etc. that shrinkage and creep causes between upper bracket plate 1 and middle slip block 2, inside configuration is avoided to produce larger second inner force, thus the infringement reduced bridge construction, increase the service life, can play on the other hand and subtract function of shock insulation, namely when earthquake occurs, this spacing ring 8 of design shearing resistance being greater than spacing ring 8 once horizontal earthquake power and vertical force disconnects, the level of middle slip block 2 in lower support plate 6 and between first sphere moving block 3 and middle slip block 2 is to reciprocating, namely by extending natural vibration period of bridge with middle slip block 2 and the arc surface of first sphere moving block 3 between middle slip block 3 and lower support plate 6, reduce the vibration displacement amplitude between upper bracket plate 1 and lower support plate 6, thus realize the effect of shock insulation, and by the friction of two sphere friction pairs between middle slip block 2 and first sphere moving block 3 and between second sphere moving block 5 and lower support plate 6, seismic energy is converted into heat energy, to reach the consumption object of seismic energy.Be connected by bolt 7 between spacing ring 8 with lower support plate 6, so that the displacement energy of earthquake is hit and splits destruction and realize function of seismic resistance, and be convenient to the maintenance after shaking; Bolt 7 must make the combination of the two have certain intensity, can be hit again split under guarantee design earthquake magnitude between the two by middle slip block 2 and first sphere moving block 3.

Claims

1. a shock-absorbing bridge support, comprise the upper bracket plate [1] be fixedly connected with beam body, the lower support plate [6] be fixedly connected with bridge pier, it is characterized in that: between upper bracket plate [1], lower support plate [6], be provided with middle slip block [2] and first sphere moving block [3] and second sphere moving block [5] that lower face is dome shape, the border of upper bracket plate [1] is provided with back-up ring [11], the upper face border of lower support plate [6] is provided with spacing ring [8]; First sphere moving block [3] and second sphere moving block [5] are Split type structure, are provided with damping spring [4] in the middle of it.

2. a kind of shock-absorbing bridge support according to claim 1, is characterized in that: spacing ring [8] is fixedly connected with lower support plate [6] by bolt [7].

3. a kind of shock-absorbing bridge support according to claim 1, is characterized in that: the subsequent corrosion of lower support plate [6] upper face is greater than the subsequent corrosion of second sphere moving block [5] lower face be slidably connected with it.

4. a kind of shock-absorbing bridge support according to claim 1, is characterized in that: the spherical crown surface of first sphere moving block [3] upper face is greater than the spherical crown surface of middle slip block [2] lower face be slidably connected with it.