CN107227684B - Damping tenon, elastic-plastic beam falling prevention limiting device and installation method thereof - Google Patents
Damping tenon, elastic-plastic beam falling prevention limiting device and installation method thereof Download PDFInfo
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- CN107227684B CN107227684B CN201710457370.1A CN201710457370A CN107227684B CN 107227684 B CN107227684 B CN 107227684B CN 201710457370 A CN201710457370 A CN 201710457370A CN 107227684 B CN107227684 B CN 107227684B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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Abstract
The application discloses a damping tenon and an elastoplastic beam falling prevention limiting device and an installation method thereof, wherein the damping tenon is a tenon body with a variable cross section along the axial lead direction; the elastic-plastic beam falling prevention limiting device comprises a beam bottom embedded sleeve assembly, a pier top embedded sleeve assembly and a damping tenon arranged between the beam bottom embedded sleeve assembly and the pier top embedded sleeve assembly, wherein the beam bottom embedded sleeve assembly is embedded in beam bottom plate concrete, and the pier top embedded sleeve assembly is embedded in pier top concrete. The application has simple structure, definite stress and shock absorption and isolation effects, can freely release temperature force in the normal working stage of the bridge, has the functions of limiting the excessive displacement of the bridge, absorbing shock and energy consumption and preventing the beam from falling under the action of an earthquake, and has simple installation and operation.
Description
Technical Field
The application relates to the technical field of bridge vibration reduction and isolation, in particular to a damping tenon and elastoplastic anti-falling beam limiting device and an installation method thereof.
Background
The falling beam is one of the main forms of bridge vibration damage, and has high occurrence frequency, high destructiveness and extremely difficult repair. The common practice of bridge seismic design is to adopt various restraint devices for different bridge structural forms so as to prevent the bridge structure from falling down to be damaged under the action of earthquake.
Currently, there are two types of commonly used beam falling prevention devices: the limiting devices are interacted between the girder and the lower structure, such as blocking type limiting devices, and comprise a stop block type limiting device and an anchoring steel bar type limiting device, wherein the limiting devices directly transmit the seismic force of the girder to the bridge pier or abutment; the other type is a beam connecting device directly connected between beam bodies, such as prestress steel strand connection type, cable connection type, steel plate connection type, damper connection type and the like, and the beam connecting device is used for realizing the transmission of earthquake force between each beam section in an earthquake by connecting each separated beam section.
The connecting beam device is not suitable for railway bridges, and is mainly because a complex structural system is formed by adopting the connecting beam device and a seamless line on the beam, and the stress of the seamless line is complicated under the normal braking force and temperature force and even affects the rail fasteners. In particular to a high-speed railway which adopts an integral ballast bed structure, and the relative displacement between a track control structure and a bridge girder body is difficult to realize.
Stop-type limit devices are often used as anti-drop beam limit devices for bridges, including railroad bridges, but the limit devices are separated longitudinally and transversely, are made of section steel, and are large in size. The disadvantage of the stop block type limiting device is represented by:
(1) The working performance is controlled by the clearance between the stop block and the supporting cushion stone. When the gap is small, the temperature force of the beam body cannot be effectively released, and when the gap is large, the stop block collides with the supporting cushion stone when an earthquake occurs, so that the beam falling prevention function is affected;
(2) The stress deformation of the stop block during earthquake cannot be accurately calculated, and the collision effect and damage thereof are difficult to estimate;
(3) When the beam body is displaced, only one side of the stop block acts, and the stop block is an anisotropic member and has obvious weak axis direction.
In the design of bridge earthquake resistance or earthquake reduction and isolation, the control of the maximum relative horizontal displacement of the beam body and the pier body is very important, on one hand, the upper structure needs to be limited not to generate excessive post-earthquake displacement, the beam is prevented from falling, and the difficulty of post-earthquake repair is reduced; on the other hand, it is necessary to ensure that the shock absorbing and insulating device does not exceed the maximum allowable displacement, resulting in failure or destruction of the shock absorbing and insulating device.
Disclosure of Invention
The application aims to provide a damping tenon and elastoplastic beam falling prevention limiting device and an installation method thereof, which have the advantages of simple structure, definite stress, damping and isolation effects, capability of freely releasing temperature force in the normal working stage of a bridge, and functions of limiting the oversized displacement of the bridge, damping energy consumption and preventing beam falling under the action of an earthquake, and simple installation operation.
In order to achieve the above object, the present application provides a damper tenon, wherein the damper tenon is a tenon body with a variable cross section along the axial line direction.
Preferably, the damper tenon is made of low alloy structural steel LY345 FLL.
Preferably, the damping tenons are formed by connecting an upper ridge fixing section, a deformation section and a lower ridge fixing section in sequence from top to bottom, the upper ridge fixing section is a conical body with the cross section gradually expanding from top to bottom along the axial lead direction, the deformation section is a concave waist drum shape with the upper part, the lower part thick and the middle part thin, and the lower ridge fixing section is an inverted conical body with the cross section gradually expanding from top to bottom along the axial lead direction.
Preferably, the cross section of the damper tongue is circular.
The elastic-plastic beam falling prevention limiting device comprises a beam bottom embedded sleeve assembly, a pier top embedded sleeve assembly and a damping tenon which is elastically installed between the beam bottom embedded sleeve assembly and the pier top embedded sleeve assembly, wherein the beam bottom embedded sleeve assembly is embedded in beam bottom plate concrete, and the pier top embedded sleeve assembly is embedded in pier top concrete.
Preferably, the beam bottom embedded sleeve assembly comprises an upper sleeve and a lower sleeve, the upper sleeve is sleeved at the upper end of the lower sleeve, an upper limiting ring is installed at the upper end of the lower sleeve, the upper end of the damper tenon is abutted to the upper limiting ring, and a first gap for releasing the horizontal displacement of the temperature force is arranged between the upper limiting ring and the damper tenon.
Preferably, the pier-top embedded sleeve assembly comprises a sleeve, a lower limiting ring is arranged at the lower end of the sleeve, the lower end of the damping tenon is propped against the lower limiting ring, and a second gap for releasing temperature force horizontal displacement is arranged between the lower limiting ring and the damping tenon.
Preferably, the lower part of the outer surface of the lower sleeve is provided with a plurality of first reinforcing ribs in the circumferential direction, and the upper part of the outer surface of the sleeve is provided with a plurality of second reinforcing ribs in the circumferential direction.
Preferably, the lower end of the lower sleeve is connected with an upper bearing ring, the upper end of the sleeve is connected with a lower bearing ring, and the upper end and the lower end of the damper tenon respectively penetrate through the upper bearing ring and the lower bearing ring.
Preferably, a rubber sealing ring is arranged between the lower bearing ring and the damper tenon.
Preferably, the upper bearing ring, the lower bearing ring, the upper limiting ring and the lower limiting ring are all made of materials with strength and hardness higher than those of the damper tenons.
Preferably, the upper sleeve, the lower sleeve and the sleeve are all made of common carbon structural steel Q235 or low alloy steel Q345.
An installation method of an elastic-plastic beam falling prevention limiting device comprises the following steps:
(1) Mounting sleeve and lower spacing ring: when the pier top cap is constructed, the sleeve and the lower limiting ring are installed in place when the top cap steel bar is bound, and the lower limiting ring is installed at the lower end of the sleeve, so that the upper surface of the sleeve is kept flush with the upper surface of the pier;
(2) Installing an upper sleeve and a lower sleeve: when the box girder is constructed, the upper sleeve and the lower sleeve are installed in place when the bottom plate steel bars at the girder end are bound, and the upper sleeve is sleeved at the upper end of the lower sleeve, so that the lower surface of the lower sleeve is kept flush with the lower surface of the bottom plate of the box girder;
(3) Lower bearing ring on the mounting sleeve: the lower bearing ring is arranged at the upper end of the sleeve, and the lower bearing ring is connected with the sleeve through the connecting piece;
(4) Install the last race ring on the lower sleeve: the upper bearing ring is arranged at the lower end of the lower sleeve, and the upper bearing ring is connected with the lower sleeve through a connecting piece;
(5) And (3) installing a damping tenon: inserting the damper tenon from the upper end of the upper sleeve, and enabling the lower end of the damper tenon to sequentially pass through the upper bearing ring and the lower bearing ring and then contact the lower limiting ring;
(6) Installing an upper limit ring: an upper limiting ring is placed in the upper end of the inner cavity of the upper sleeve until the upper limiting ring contacts the damping tenon in place;
(7) Installing a rubber sealing ring: and installing the rubber sealing ring at the top of the sleeve, and tightening and fixing the rubber sealing ring to seal the lower bearing ring and the damping tenon.
After the scheme is adopted, the damping tenon and elastoplastic beam falling prevention limiting device and the installation method thereof have the following beneficial effects:
(1) The application has simple design and structure, is formed by integrally connecting the upper sill fixed section, the deformation section and the lower sill fixed section, bears the vehicle braking force transmitted by the beam body through the elastic deformation section of the damping tenon, and elastically restores the damping tenon to the working state before the braking force acts after the braking force is eliminated;
(2) When an earthquake occurs, the damping mortises enter the plastic working section and the action of the earthquake force is reduced through the plastic energy consumption of the damping mortises; when high-intensity earthquake occurs, the elastic-plastic damping tenons enter a shaping energy-consuming working state, so that the purposes of consuming earthquake energy, prolonging the structural period and reducing earthquake force and preventing beam falling are achieved;
(3) The damping tenon has the characteristics of elastoplastic deformation and cyclic operation, so that the situation that a stop block of the stop block type anti-falling beam limiting device collides with a supporting cushion stone is avoided, and the anti-falling Liang Nengli is improved;
(4) According to the application, the cross section of the damping tenon is designed into a circle, so that the damping tenon can play a role in damping, isolating and limiting any earthquake in the horizontal direction;
(5) According to the application, through the control of the first gap between the damper tenon and the upper limiting ring and the second gap between the damper tenon and the lower limiting ring, the elastoplastic beam falling prevention device is in an elastic working state in a normal use state, and can freely and effectively release temperature force;
(6) The application can accurately calculate the earthquake action effect, thereby realizing the design and control of the earthquake reduction and isolation of the bridge pier and the foundation.
Drawings
FIG. 1 is a schematic view of a damper tongue embodiment of the present application;
FIG. 2 is a schematic structural view of an embodiment of an elastic-plastic beam falling prevention limiting device of the present application;
FIG. 3 is a schematic cross-sectional view of a beam bottom pre-buried sleeve assembly of the present application;
FIG. 4 is a schematic cross-sectional view of the pier top pre-buried sleeve assembly of the present application;
FIG. 5 is a schematic cross-sectional view of an upper stop collar of the present application;
FIG. 6 is a schematic top view of the bearing ring of the present application;
fig. 7 is a schematic view of the cross-sectional structure A-A of fig. 6.
Detailed Description
The application is elucidated below on the basis of embodiments shown in the drawings. The presently disclosed embodiments are considered in all respects to be illustrative and not restrictive. The scope of the present application is not limited by the following description of the embodiments, but is only indicated by the scope of the claims, and includes all modifications having the same meaning and within the scope of the claims.
The application relates to a damping tenon and an elastic-plastic beam falling prevention limiting device and an installation process thereof, which are specifically described below with reference to the accompanying drawings.
As shown in FIG. 1, the damper tenon 1 is a tenon body with a variable cross section along the axial line direction. The damper tongue 1 is made of a low alloy structural steel LY345FLL, and the yield ratio thereof is controlled below 0.72. The material has good toughness, and the carbon content is lower than 1.35%. The low cycle fatigue test of the damper tongue 1 reaches at least 12-15 cycles. In this embodiment, the cross-sectional shape of the damper tongue 1 is selected to be a circular cross-section with symmetrical stress, taking into account uncertainty in the direction of the seismic wave. The damping tenon 1 sequentially comprises an upper ridge fixing section 2, a deformation section 3 and a lower ridge fixing section 4 from top to bottom, and is formed by integrally processing a steel rod by adopting a numerical control machine tool. Wherein, the upper ridge fixed section 2 is a conical body with the cross section gradually expanding from top to bottom along the axial lead direction. The deformation section 3 is concave waist drum shape with thick upper and lower parts and thin middle part. The lower ridge fixing section 4 is an inverted cone with a cross section gradually reduced from top to bottom along the axial lead direction.
In the embodiment, the cross section of the damper tenon 1 is set to be a tenon body structure with a variable cross section along the axial direction, so that the deformable energy consumption can be reduced when an earthquake occurs.
The application relates to an elastic-plastic beam falling prevention limiting device which is suitable for a cast-in-place concrete bridge structure and is arranged between a bridge pier top and a bridge body, wherein the structural schematic diagram of an embodiment of the elastic-plastic beam falling prevention limiting device shown in fig. 2 comprises a beam bottom embedded sleeve assembly 5, a pier top embedded sleeve assembly 6 and a damping tenon 1 which is elastically arranged between the beam bottom embedded sleeve assembly and the pier top embedded sleeve assembly 6, wherein the beam bottom embedded sleeve assembly 5 is embedded in beam bottom plate concrete 7, and the pier top embedded sleeve assembly 6 is embedded in pier top concrete 8.
Referring to fig. 3, the beam bottom embedded sleeve assembly 5 includes an upper sleeve 9 and a lower sleeve 10, in this embodiment, the upper sleeve 9 and the lower sleeve 10 are seamless steel pipes, and the upper sleeve 9 and the lower sleeve 10 are made of a common carbon structural steel Q235 or a low alloy steel Q345. The upper sleeve 9 is sleeved on the upper end of the outer surface of the lower sleeve 10, a first annular groove 11 is arranged at the upper end of the inner cavity of the lower sleeve 10, an upper limiting ring 12 is arranged at the upper end of the lower sleeve 10, and the upper limiting ring 12 is composed of a top cover 13 and an annular plate 14 connected below the top cover 13 as shown in combination with fig. 5. The annular plate 14 of the upper limiting ring 12 is arranged on the first annular groove 11, a plurality of first reinforcement ribs 15, preferably 6-8, are uniformly arranged on the lower portion of the outer surface of the lower sleeve 10 along the circumferential direction, the lower end of the inner cavity of the lower sleeve 10 is provided with a second annular groove 16, the lower end of the lower sleeve 10 is connected with an upper bearing ring 18 through a fastening screw 17, and the upper bearing ring 18 is arranged on the second annular groove 16. As shown in fig. 6 and 7, the upper bearing ring 18 is a revolution body having an L-shaped cross section, and a concave waist drum-shaped through hole 19 is provided at the center thereof. The upper end of the damper tenon 1 passes through the through hole 19 of the upper bearing ring 18. The upper bearing ring 18 and the upper limiting ring 12 are made of materials with strength and hardness higher than those of the damper tenon 1, and the upper bearing ring 18 and the upper limiting ring 12 are made of 45 # steel.
Referring to fig. 4, the pier top pre-buried sleeve assembly 6 includes a sleeve 20, in this embodiment, the sleeve 20 is a seamless steel pipe, and further, the sleeve 20 is made of a common carbon structural steel Q235 or a low alloy steel Q345. The lower end of the inner cavity of the sleeve 20 is provided with a third annular groove 21, the lower end of the sleeve 20 is provided with a lower limiting ring 22, and the structure of the lower limiting ring 22 and the structure of the upper limiting ring 12 are designed in an up-down symmetry manner, so that the description is omitted. The lower limit ring 22 is mounted on the third annular groove 21, and a plurality of second reinforcing ribs 23, preferably 6-8, are uniformly arranged on the upper part of the outer surface of the sleeve 20 in the circumferential direction. The upper end of the inner cavity of the sleeve 20 is provided with a fourth annular groove 24, the upper end of the sleeve 20 is connected with a lower bearing ring 25 through a fastening screw 17, and the lower bearing ring 25 is arranged on the fourth annular groove 24. The structure of the lower bearing ring 25 and the structure of the upper bearing ring 18 are designed to be basically corresponding up and down, and are not repeated herein, the lower end of the damper tenon 1 passes through the central through hole of the lower bearing ring 25, a rubber sealing ring 26 is arranged between the lower bearing ring 25 and the damper tenon 1 in a sealing manner, wherein the lower end of the rubber sealing ring 26 is circumferentially connected to the lower bearing ring 25 through a fastening screw which is not shown, the upper end of the rubber sealing ring 26 is fixedly connected to the lower part of the deformation section 3 of the damper tenon 1, and a plurality of screw holes which are not shown are arranged on the lower bearing ring 25 along the radial direction. The lower bearing ring 25 and the lower limiting ring 22 are made of materials with strength and hardness higher than those of the damper tenon 1, and the lower bearing ring 25 and the lower limiting ring 22 are made of 45 # steel in the embodiment.
As shown in fig. 1, the damper tongue 1 is a tongue body having a variable cross section along the axial line direction. The damper tongue 1 is made of a low alloy structural steel LY345FLL, and the yield ratio thereof is controlled below 0.72. The material has good toughness, and the carbon content is lower than 1.35%. The low cycle fatigue test of the damper tongue 1 reaches at least 12-15 cycles. In this embodiment, the cross-sectional shape of the damper tongue 1 is selected to be a circular cross-section with symmetrical stress, taking into account uncertainty in the direction of the seismic wave. The damping tenon 1 sequentially comprises an upper ridge fixing section 2, a deformation section 3 and a lower ridge fixing section 4 from top to bottom, and is formed by integrally processing a steel rod by adopting a numerical control machine tool. Wherein, the upper ridge fixed section 2 is a conical body with the cross section gradually expanding from top to bottom along the axial lead direction. The deformation section 3 is concave waist drum shape with thick upper and lower parts and thin middle part. The lower ridge fixing section 4 is an inverted cone with a cross section gradually reduced from top to bottom along the axial lead direction.
The upper sill fixed section 2 of the damper tenon 1 is arranged in the beam bottom embedded steel cylinder assembly 5, the upper end of the upper sill fixed section 2 of the damper tenon 1 is propped against the upper limiting ring 12, and a first gap D1 for releasing temperature force horizontal displacement is arranged between the upper limiting ring 12 and the damper tenon 1; the lower sill fixed section 3 of the damper tenon 1 is arranged in the pier top embedded steel cylinder assembly 6, the lower end of the lower sill fixed section 4 of the damper tenon 1 is propped against the lower limiting ring 22, a second gap D2 for releasing the horizontal displacement of the temperature force is arranged between the lower limiting ring 22 and the damper tenon 1, and the first gap D1 and the second gap D2 are determined by the design of the temperature expansion value of a concrete bridge.
The installation method of the elastic-plastic beam falling prevention limiting device described in the embodiment comprises the following steps:
(1) First, the sleeve 20 and the lower stop collar 22 are installed: when the pier top cap is constructed, the sleeve 20 and the lower limiting ring 22 are installed in place when the top cap steel bars are bound, the lower limiting ring 22 is installed at the lower end of the sleeve 20, and the installation position of the sleeve 20 is accurate, so that the upper surface of the sleeve 20 is kept flush with the pier upper surface;
(2) Then the upper sleeve 9 and the lower sleeve 10 are installed: when the bottom plate steel bars at the beam end are bound during the construction of the box girder, the upper sleeve 9 and the lower sleeve 10 are installed in place, the upper sleeve 9 is sleeved on the upper end of the outer surface of the lower sleeve 10, the installation positions of the upper sleeve 9 and the lower sleeve 10 are accurate, and the lower surface of the lower sleeve 10 is kept flush with the lower surface of the bottom plate of the box girder;
(3) Lower bearing ring 25 on mounting sleeve 20: the lower bearing ring 25 is arranged at the upper end of the sleeve 20, and the lower bearing ring 25 and the sleeve 20 are connected together through a plurality of fastening screws 17;
(4) Upper bearing ring 18 mounted on lower sleeve 10: an upper bearing ring 18 is arranged at the lower end of the lower sleeve 10, and the upper bearing ring 18 is connected with the lower sleeve 10 through a plurality of fastening screws 17;
(5) Installing a damping tenon 1: inserting the damper tenon 1 from the upper end of the inner cavity of the upper sleeve 9, and enabling the lower end of the damper tenon 1 to sequentially pass through the upper bearing ring 18 and the lower bearing ring 25 and then contact the lower limiting ring 22;
(6) And (3) installing an upper limiting ring 12: an upper limiting ring 12 is placed in the upper end of the inner cavity of the upper sleeve 9 until the upper limiting ring 12 contacts the damper tenon 1 which is already in place;
(7) And (2) installing a rubber sealing ring 26: the rubber seal ring 26 is arranged on the top of the sleeve 20, and is clamped and fixed, so that the lower bearing ring 25 and the damper tenon 1 are sealed.
The elastic-plastic beam falling prevention limiting device has the advantages of simple design and construction, clear stress, shock absorption and isolation effects, free release of temperature force in the normal working stage of the bridge, limit of bridge oversized displacement, shock absorption and energy consumption and beam falling prevention under the action of an earthquake, and simple installation and operation. The method comprises the following steps: the damping tenon 1 is formed by integrally connecting an upper sill fixed section 2, a deformation section 3 and a lower sill fixed section 4, wherein the upper sill fixed section 2 and the lower sill fixed section 4 are used as force transmission sections for transmitting horizontal seismic force, the deformation section 3 realizes the function of energy consumption and damping through the deformation work of a material plastic platform when the horizontal seismic force is transmitted, the elastic deformation section 3 of the damping tenon 1 is used for bearing the vehicle braking force transmitted by a beam body, and the damping tenon 1 is elastically restored to the working state before the braking force is acted after the braking force is eliminated; when an earthquake happens, the damper tenon 1 enters a plastic working section and reduces the action of the earthquake force through the plastic energy consumption of the damper tenon 1; when high-intensity earthquake occurs, the elastic-plastic damper tenon 1 enters a shaping energy-consuming working state, so that the purposes of consuming earthquake energy, prolonging the structural period and reducing earthquake force and preventing beam falling are achieved; the damping tenons 1 have the characteristics of elastoplastic deformation and cyclic operation, so that the situation that a stop block of the stop block type anti-falling beam limiting device collides with a supporting cushion stone is avoided, and the anti-falling Liang Nengli is improved; the cross section of the damping tenon 1 is designed into a round shape, so that the damping tenon can play a role in damping, isolating and limiting any earthquake in the horizontal direction; the elastic-plastic beam falling prevention device is in an elastic working state under a normal use state by controlling a first gap D1 between the damper tenon 1 and the upper limiting ring 12 and a second gap D2 between the damper tenon 1 and the lower limiting ring 22, and can freely and effectively release temperature force; the application can accurately calculate the earthquake action effect, thereby realizing the design and control of the earthquake reduction and isolation of the bridge pier and the foundation.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (11)
1. The elastic-plastic beam falling prevention limiting device is characterized by comprising a beam bottom embedded sleeve assembly, a pier top embedded sleeve assembly and a damping tenon which is elastically installed between the beam bottom embedded sleeve assembly and the pier top embedded sleeve assembly, wherein the beam bottom embedded sleeve assembly is embedded in beam bottom plate concrete, and the pier top embedded sleeve assembly is embedded in pier top concrete;
the beam bottom embedded sleeve assembly comprises an upper sleeve and a lower sleeve, the upper sleeve is sleeved at the upper end of the lower sleeve, an upper limiting ring is arranged at the upper end of the lower sleeve, the upper end of the damping tenon is propped against the upper limiting ring, and a first gap for releasing temperature force horizontal displacement is arranged between the upper limiting ring and the damping tenon.
2. The elastic-plastic beam falling prevention limiting device according to claim 1, wherein the pier-top embedded sleeve assembly comprises a sleeve, a lower limiting ring is arranged at the lower end of the sleeve, the lower end of the damper tenon is abutted against the lower limiting ring, and a second gap for releasing horizontal displacement of temperature force is arranged between the lower limiting ring and the damper tenon.
3. The elastoplastic drop beam stop as defined in claim 2, wherein a plurality of first ribs are circumferentially disposed on a lower portion of the outer surface of the lower sleeve, and a plurality of second ribs are circumferentially disposed on an upper portion of the outer surface of the sleeve.
4. The elastic-plastic falling beam limiting device according to claim 2 or 3, wherein the lower end of the lower sleeve is connected with an upper bearing ring, the upper end of the sleeve is connected with a lower bearing ring, and the upper end and the lower end of the damper tenon respectively penetrate through the upper bearing ring and the lower bearing ring.
5. The elastic-plastic drop-preventing beam limiting device according to claim 4, wherein a rubber sealing ring is arranged between the lower bearing ring and the damper tenon.
6. The elastoplastic drop beam stop of claim 5, wherein the upper and lower bearing rings, upper and lower stop rings are each made of a material having a strength and hardness higher than the damper tongue.
7. The elastoplastic drop beam stop of claim 6, wherein the upper sleeve, lower sleeve and sleeve are made of plain carbon structural steel Q235 or low alloy steel Q345.
8. The elastic-plastic drop-preventing beam limiting device according to claim 1, wherein the damper tenon is a tenon body with a variable cross section along the axial line direction;
the shock absorption tenons sequentially comprise an upper ridge fixing section, a deformation section and a lower ridge fixing section from top to bottom, wherein the upper ridge fixing section is a conical body with the cross section gradually expanding from top to bottom along the axis direction, the deformation section is a concave waist drum shape with the upper part and the lower part thick and the middle part thin, and the lower ridge fixing section is an inverted conical body with the cross section gradually expanding from top to bottom along the axis direction.
9. The elastoplastic drop beam stop of claim 8, wherein the damper tongue is made of low alloy structural steel LY345 FLL.
10. An elastoplastic drop beam stop as defined in claim 8 or 9, wherein the cross section of the damper tongue is circular.
11. The installation method of the elastic-plastic beam falling prevention limiting device is characterized by comprising the following steps of:
(1) Mounting sleeve and lower spacing ring: when the pier top cap is constructed, the sleeve and the lower limiting ring are installed in place when the top cap steel bar is bound, and the lower limiting ring is installed at the lower end of the sleeve, so that the upper surface of the sleeve is kept flush with the upper surface of the pier;
(2) Installing an upper sleeve and a lower sleeve: when the box girder is constructed, the upper sleeve and the lower sleeve are installed in place when the bottom plate steel bars at the girder end are bound, and the upper sleeve is sleeved at the upper end of the lower sleeve, so that the lower surface of the lower sleeve is kept flush with the lower surface of the bottom plate of the box girder;
(3) Lower bearing ring on the mounting sleeve: the lower bearing ring is arranged at the upper end of the sleeve, and the lower bearing ring is connected with the sleeve through the connecting piece;
(4) Install the last race ring on the lower sleeve: the upper bearing ring is arranged at the lower end of the lower sleeve, and the upper bearing ring is connected with the lower sleeve through a connecting piece;
(5) And (3) installing a damping tenon: inserting the damper tenon from the upper end of the upper sleeve, and enabling the lower end of the damper tenon to sequentially pass through the upper bearing ring and the lower bearing ring and then contact the lower limiting ring;
(6) Installing an upper limit ring: an upper limiting ring is placed in the upper end of the inner cavity of the upper sleeve until the upper limiting ring contacts the damping tenon in place;
(7) Installing a rubber sealing ring: and installing the rubber sealing ring at the top of the sleeve, and tightening and fixing the rubber sealing ring to seal the lower bearing ring and the damping tenon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710457370.1A CN107227684B (en) | 2017-06-16 | 2017-06-16 | Damping tenon, elastic-plastic beam falling prevention limiting device and installation method thereof |
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| CN201710457370.1A CN107227684B (en) | 2017-06-16 | 2017-06-16 | Damping tenon, elastic-plastic beam falling prevention limiting device and installation method thereof |
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| CN107227684B true CN107227684B (en) | 2023-09-19 |
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| CN109610301B (en) * | 2019-01-29 | 2023-08-04 | 中铁二院工程集团有限责任公司 | Damping energy consumption three-way limiting metal damping device for near-fault bridge and installation method |
| CN110175426B (en) * | 2019-05-31 | 2022-06-14 | 中铁二院工程集团有限责任公司 | Design method of railway bridge elastic-plastic metal limiting, damping and energy-consuming device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08284114A (en) * | 1995-04-18 | 1996-10-29 | Kajima Corp | Response control device for bridge |
| JPH10317323A (en) * | 1997-05-20 | 1998-12-02 | Yokohama Rubber Co Ltd:The | Bar type bridge fall prevention device |
| JP2010242443A (en) * | 2009-04-09 | 2010-10-28 | Railway Technical Res Inst | Concrete exfoliation preventing structure and method for constructing the same |
| JP2011043030A (en) * | 2009-08-24 | 2011-03-03 | Kajima Corp | Damper structure |
| CN201850501U (en) * | 2010-11-16 | 2011-06-01 | 成都市新筑路桥机械股份有限公司 | Damping structure for bridge |
| CN105937202A (en) * | 2016-05-03 | 2016-09-14 | 北京交达铁工科技有限公司 | Separation type mild steel shock absorber |
-
2017
- 2017-06-16 CN CN201710457370.1A patent/CN107227684B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08284114A (en) * | 1995-04-18 | 1996-10-29 | Kajima Corp | Response control device for bridge |
| JPH10317323A (en) * | 1997-05-20 | 1998-12-02 | Yokohama Rubber Co Ltd:The | Bar type bridge fall prevention device |
| JP2010242443A (en) * | 2009-04-09 | 2010-10-28 | Railway Technical Res Inst | Concrete exfoliation preventing structure and method for constructing the same |
| JP2011043030A (en) * | 2009-08-24 | 2011-03-03 | Kajima Corp | Damper structure |
| CN201850501U (en) * | 2010-11-16 | 2011-06-01 | 成都市新筑路桥机械股份有限公司 | Damping structure for bridge |
| CN105937202A (en) * | 2016-05-03 | 2016-09-14 | 北京交达铁工科技有限公司 | Separation type mild steel shock absorber |
Non-Patent Citations (1)
| Title |
|---|
| 郑晓龙 ; 曾永平 ; 游励晖 ; 樊启武 ; .铁路桥梁减震卡榫的设计与应用性能研究.高速铁路技术.2016,(06),全文. * |
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