CN109083000A - A kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology - Google Patents
A kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology Download PDFInfo
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- CN109083000A CN109083000A CN201811073817.6A CN201811073817A CN109083000A CN 109083000 A CN109083000 A CN 109083000A CN 201811073817 A CN201811073817 A CN 201811073817A CN 109083000 A CN109083000 A CN 109083000A
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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 present invention relates to a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology, including beam body and abutment, it further include that buckling restrained brace structure, limit are slidably connected component and moveable hinge, the both ends of buckling restrained brace structure are separately connected the limit and are slidably connected component and moveable hinge；It limits the component that is slidably connected and is fixed on beam body lower end；Buckling restrained brace structure is made of connecting portion, support inner core, outside steel pipe, non-cohesive material, it supports and is filled with mortar or concrete between inner core and outside steel pipe, drag-line is passed through from the mortar or concrete between the outside steel pipe and support inner core of buckling restrained brace structure, is anchored on the anchorage and anchor plate of buckling restrained brace structure both ends connecting portion respectively.The present invention is able to achieve thin tail sheep Free Transform, middle displacement energy consumption, big displacement limit function.Its apparatus structure is simple, reliable, can be effectively controlled bridge and falls beam or collision in earthquake, guarantees the safety of bridge.
Description
Technical field
The present invention relates to a kind of bridge anticollision and fall girder apparatus, especially a kind of combined multi-stage based on BRB technology
Antidetonation bridge anticollision and fall girder apparatus, belong to bridge earthquake resistance and bridge subtracts technical field of isolation.
Background technique
Over nearly twenty or thirty year, the secondary disaster that earthquake and earthquake cause is to threaten the Major Natural calamity of environment for human survival
One of evil, causes heavy losses to the security of the lives and property of the mankind.In some highlight lines areas, bridge will hair under geological process
Raw biggish length travel causes superstructure to collide or fall beam earthquake after displacement is more than permissible value.
The method for solving collision at present and falling beam is mainly to pass through the supporting surface width for increasing support connecting portion and constraint
Limiting device.Although the above method solves girder collision to a certain extent and falls beam earthquake, the effect obtained is not obvious,
Especially in rarely occurred earthquake, Beam pounding causes structural damage very big, and still falls beam accident.
Summary of the invention
It is a kind of (i.e. buckling-restrained based on BRB the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide
Support) technology combined multi-stage antidetonation bridge anticollision and fall girder apparatus, structure is simple, easy to use, reliable, can be effective
Control bridge falls beam or collision in earthquake, guarantees bridge security.
In order to solve the above technical problems, the technical solution used in the present invention is:
A kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology, including beam body and abutment, institute
It states and is provided with laminated rubber bearing between beam body end base and abutment, the combined multi-stage antidetonation bridge anticollision and Luo Liang
Device further includes buckling restrained brace structure, limits be slidably connected component and moveable hinge, the buckling restrained brace structure
Both ends are separately connected the limit and are slidably connected component and moveable hinge, and the moveable hinge is arranged on abutment front wall top；It is described
The limit component that is slidably connected is fixed on beam body lower end, and seismic force when can be by beam body and abutment clutch passes to buckling restrained brace
Structure consumes energy by buckling restrained brace structure energy-absorbing or deformation, is effectively prevented and falls beam and collision.
Wherein, the buckling restrained brace structure is made of connecting portion, support inner core, outside steel pipe, non-cohesive material,
It supports and is filled with mortar or concrete, outside steel pipe and branch of the drag-line from buckling restrained brace structure between inner core and outside steel pipe
Support inner core between mortar or concrete in pass through, be anchored at respectively buckling restrained brace structure both ends connecting portion anchorage and
On anchor plate；It is coated with non-cohesive material around the support inner core and drag-line, meets and supports inner core and drag-line under poisson effect
Transversely deforming；Wherein, the support inner core configuration node between anchor plate and outside steel pipe, to guarantee that node remains elasticity,
Without flexing is destroyed, and node, which is provided with, reinforces section.
The limit is slidably connected component as board-like drawing and pulling type structure, including two blocks of trapezoidal perpendicular limb steel plates and connection pin shaft,
Two blocks of trapezoidal perpendicular limb steel plates are equipped with horizontal strip hole, connect pin shaft from horizontal strip hole and the connecting hole of connecting portion
In pass through, trapezoidal perpendicular limb steel plate is connected with connecting portion.
Further, the support inner core of the buckling restrained brace structure is cross section, and material is steel, utilizes branch
The elastic-plastic deformation of support inner core meets the Deformation Demands of beam body, improves the utilization rate of material.
Further, the pre-embedded steel slab welding of the upper end Yu beam body bottom of the trapezoidal perpendicular limb steel plate；It is set on pre-embedded steel slab
It is equipped with embedded bar, embedded bar is anchored inside beam body upwards, to meet the connection for limiting be slidably connected component and beam body
Detailing requiments.
Further, the laminated rubber bearing bottom is provided with bearing pad stone.
Further, drag-line uses high strength low relaxed steel strand wires, and single beam nominal diameter is 15.24mm, tensile strength
For 1860MPa.
Further, the buckling restrained brace structure and connecting pin between centers and buckling restrained brace structure and moveable hinge
Between be movable bolt fastening structure, the replacement requirement to buckling restrained brace structure can be met.
Further, the design bearing capacity of the node connected with pin shaft is connect and connecting portion should be greater than buckling restrained brace
The ultimate bearing capacity of structure makes node and connecting portion keep elasticity, node and connecting portion is avoided to enter surrender in advance, guarantees
Buckling restrained brace structure effectively works.
Wherein, in initial makeup location, the connecting pin axle position, can be in horizontal in the middle position of horizontal strip hole
It is slided in strip hole, the small displacement demand of beam body can be met, at this point, drag-line is in not tension and the free state not being pressurized, pine
Relaxation length is horizontal strip hole and the separation delta that connect pin shaft1With the ultimate elongation value Δ of buckling restrained brace structure2It
With；In the case of normal operation or small shake, beam body occurs to limit the connection pin shaft for the component that is slidably connected in horizontal to displacement along bridge
It can move freely in strip hole, meet Deformation Demands in the case of temperature, wind load and small shake；Middle shake effect under, beam body with
The relative displacement of abutment increases, when the limit any end that is slidably connected in component in horizontal strip hole both ends connects with pin shaft is connect
When touching, buckling restrained brace structure is activated, is deformed by buckling restrained brace structural plasticity come the seismic energy that dissipates, and then effectively
It prevents bridge from falling beam, reduces the risk of collision of beam body (2) and abutment (3)；Under big shake effect, when the phase of beam body and abutment
Split displacement is increased it is larger, more than the deformability of buckling restrained brace structure, i.e. buckling restrained brace structural failure, at this time
Drag-line plays a role, and reduces beam body length travel, greatly reduces beam body and fall beam risk；And when relatively closed displacement continues to increase
When, the compressive deformation value of buckling restrained brace structure persistently increases, and the rubber pad on abutment plays a role at this time, alleviates beam body
Collision effect between abutment.
Or further, bridge pier can be used and substitute above-mentioned abutment, buckling restrained brace structure and drag-line setting are existed
Between beam body and bridge pier.
Compared with the existing technology, the present invention has the following technical effect that
After the combined multi-stage antidetonation bridge anticollision and fall girder apparatus of the invention based on BRB technology, anticollision
It is simple, reliable with anti-fall girder apparatus structure, it can be effectively controlled bridge and fall beam or collision in earthquake, guarantee the peace of bridge
Entirely.Meanwhile the present invention has preferable applicability to different bridge types and grade bridge of providing fortification against earthquakes, and is set based on " fuse " theory
Core segment length, quantity (area of section) and the stiffness parameters for counting BRB structure adjust the beam of drag-line according to design specification requirement
Number, meets different earthquake resistant engineering design requirements.The present invention is used similar to " fuse " function based on buckling restrained brace (BRB)
The scheme of technology, under geological process between beam body and pier (platform) when generation relative displacement, buckling restrained brace is always surrendered,
Buckling will not occur, using its preferable hysteretic energy fall arrest of the present invention is significantly reinforced with anti-collision capacity, cooperation is drawn
Rope and rubber pad, structure is simple, and cost is relatively low, can efficiently control bridge and fall beam or collision in earthquake, convenient for promoting
With use.
Detailed description of the invention
Fig. 1 is a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus application based on BRB technology of the invention
When structural schematic diagram.
Structural front view when Fig. 2 is present invention application.
Structure A-A sectional view when Fig. 3 is present invention application.
Structure B-B sectional view when Fig. 4 is present invention application.
Fig. 5 is buckling restrained brace (BRB) schematic diagram.
Fig. 6 is buckling restrained brace (BRB) (being free of connecting portion) composition figure.
In figure: 1, buckling restrained brace structure；2, beam body；3, abutment；4, the component that is slidably connected is limited；5, moveable hinge；6,
Bearing pad stone；7, laminated rubber bearing；8, connecting portion steel plate, anchorage and anchor plate；9, steel plate duct；10, drag-line；11, rubber
Rubber mat；12, mortar or concrete；1a, connecting portion；1b, support inner core；1c, outside steel pipe；1d, non-cohesive material；1e, section
Point；4a, embedded bar；4b, pre-embedded steel slab；4c, trapezoidal perpendicular limb steel plate；4d, horizontal strip hole；4e, connection pin shaft；5a, work
It is dynamic to be hinged screw rod；5b, moveable hinge junction steel plate；5c, moveable hinge pre-embedded steel slab；5d, moveable hinge embedded bar.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Embodiment 1
As shown in figures 1 to 6, a kind of combined multi-stage antidetonation bridge anticollision based on BRB technology of the invention is filled with beam is fallen
It sets, including beam body 2 and abutment 3, laminated rubber bearing 7, laminated rubber bearing 7 is provided between 2 end base of beam body and abutment 3
Bottom is provided with bearing pad stone 6.Combined multi-stage antidetonation bridge anticollision and fall girder apparatus further include buckling restrained brace structure
1, limit is slidably connected component 4 and moveable hinge 5, and the both ends of buckling restrained brace structure 1 are separately connected limit and are slidably connected group
Part 4 and moveable hinge 5, moveable hinge 5 are arranged on 3 front wall top of abutment；It limits the component 4 that is slidably connected and is fixed on 2 lower end of beam body, energy
Seismic force when by 3 clutch of beam body 2 and abutment passes to buckling restrained brace structure 1, passes through 1 energy-absorbing of buckling restrained brace structure
Or deformation is effectively prevented to consume energy and falls beam and collision.
Wherein, buckling restrained brace structure 1 is by connecting portion 1a, support inner core 1b, outside steel pipe 1c, non-cohesive material 1d
Composition supports and is filled with mortar or concrete 12 between inner core 1b and outside steel pipe 1c, in the support of buckling restrained brace structure 1
Core 1b is cross section, and material is steel, and the Deformation Demands of beam body are met using the elastic-plastic deformation of support inner core 1b, are improved
The utilization rate of material.Drag-line 10 is from the mortar between the outside steel pipe 1c and support inner core 1b of buckling restrained brace structure 1 or mixes
It passes through, is anchored on the anchorage and anchor plate 8 of 1 both ends connecting portion 1a of buckling restrained brace structure respectively in solidifying soil 12.Drag-line
10 use high strength low relaxed steel strand wires, and single beam nominal diameter is 15.24mm, tensile strength 1860MPa, the present embodiment
To use high strength low relaxed dimension twisted wire, drag-line is in not tension when installation and the free state not being pressurized, relaxed length are
Strip hole 4d and the separation delta for connecting pin shaft 4e1With the ultimate elongation value Δ of BRB structure 12The sum of.Support inner core 1b and drawing
It is coated with non-cohesive material 1d around rope 10, meets the transversely deforming for supporting inner core 1b and drag-line 10 under poisson effect；Wherein, anchor pad
Support inner core 1b configuration node 1e between plate 8 and outside steel pipe 1c, to guarantee that node 1e remains elasticity, without flexing
It destroys, node 1e, which is provided with, reinforces section.Limit is slidably connected component 4 as board-like drawing and pulling type structure, including two pieces of trapezoidal perpendicular limbs
Steel plate 4c and connection pin shaft 4e, two pieces of trapezoidal perpendicular limb steel plate 4c are equipped with horizontal strip hole 4d, connect pin shaft 4e from horizontal
It is passed through in the connecting hole of strip hole 4d and connecting portion 1a, trapezoidal perpendicular limb steel plate 4c and connecting portion 1a is connected.Ladder
The pre-embedded steel slab 4b of upper end and 2 bottom of beam body that shape erects limb steel plate 4c is welded；Embedded bar 4a is provided on pre-embedded steel slab 4b, in advance
It buries reinforcing bar 4a to be anchored at upwards inside beam body 2, to meet the connecting structure requirement for limiting be slidably connected component 4 and beam body 2.It bends
It is that movable bolt connects between song constraint support construction 1 and connection pin shaft 4e and between buckling restrained brace structure and moveable hinge 5
Binding structure can meet the replacement requirement to buckling restrained brace structure.The node 1e and connecting portion connected with pin shaft 4e is connect
The design bearing capacity of 1a should be greater than the ultimate bearing capacity of buckling restrained brace structure 1, and node 1e and connecting portion 1a is made to keep bullet
Property, it avoids node 1e and connecting portion 1a from entering surrender in advance, guarantees that buckling restrained brace structure 1 effectively works.
Under normal operating condition, the flexible deformation of the gap of horizontal strip hole 4d and buckling restrained brace structure 1 can be with
Meet small deformation (deformation caused by temperature or wind load) demand of beam body.When earthquake occurs, beam body 2 and abutment 3 are generated relatively
Displacement enters yield situation with the buckling restrained brace structure 1 for connecting pin shaft 4e connection, but not buckling occurs, a large amount of to dissipate
Seismic energy.When clutch campaign occurs for beam body 2 and abutment 3, beam body is taken in the shift value that longitudinal direction is fallen from support according to Specification Design
Value is used as 1 ultimate deformation value Δ of buckling restrained brace structure2Design standard, cooperate drag-line and rubber pad, realize energy consumption limit
Function, guarantee do not fall beam and reduce collision effect.
Embodiment 2
Using the abutment 3 in bridge pier alternate embodiment 1, buckling restrained brace structure 1 and drag-line 10 are arranged in beam body 2
Between bridge pier, buckling restrained brace structure 1, the setting and connection for limiting be slidably connected component 4, moveable hinge 5 and its drag-line 10
Mode is not repeated herein with embodiment 1.
After adopting the above structure, so that fall arrest of the present invention is significantly reinforced with anti-collision capacity, and structure is simple, cost
It is low, it can be effectively controlled bridge and fall beam or collision in earthquake, convenient for promoting and using.
Above-described embodiment, which is intended merely to become apparent from, illustrates that technical solution of the present invention made enumerates, not to of the invention
It limits, those skilled in the art are according to the common knowledge of this field to the accommodation of technical scheme also in this Shen
Please be within protection scope, in short, above-described embodiment is only to enumerate, the protection scope of the application is with scope
It is quasi-.
Claims (9)
1. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology, including beam body (2) and abutment
(3), laminated rubber bearing (7) are provided between beam body (2) end base and abutment (3), it is characterised in that: the combination
Formula multistage antidetonation bridge anticollision and fall girder apparatus further include buckling restrained brace structure (1), limit be slidably connected component (4) with
And moveable hinge (5), the both ends of the buckling restrained brace structure (1) be separately connected it is described limit be slidably connected component (4) and
Moveable hinge (5), the moveable hinge (5) are arranged on abutment (3) front wall top；The component (4) that is slidably connected that limits is fixed on beam
Body (2) lower end, seismic force when can be by beam body (2) and abutment (3) clutch pass to buckling restrained brace structure (1), by bending
Song constraint support construction (1) energy-absorbing or deformation are effectively prevented to consume energy and fall beam and collision；
Wherein, the buckling restrained brace structure (1) is viscous by connecting portion (1a), support inner core (1b), outside steel pipe (1c), nothing
Material (1d) composition is tied, supports and is filled with mortar or concrete (12), drag-line (10) between inner core (1b) and outside steel pipe (1c)
It is worn from the mortar or concrete (12) between the outside steel pipe (1c) and support inner core (1b) of buckling restrained brace structure (1)
It crosses, is anchored on the anchorage and anchor plate (8) of buckling restrained brace structure (1) both ends connecting portion (1a) respectively；The support
It is coated with non-cohesive material (1d) around inner core (1b) and drag-line (10), meets and supports inner core (1b) and drag-line (10) under poisson effect
Transversely deforming；Wherein, support inner core (1b) configuration node (1e) between anchor plate (8) and outside steel pipe (1c), to guarantee
Node (1e) remains that elasticity, without flexing are destroyed, and node (1e), which is provided with, reinforces section；
The limit is slidably connected component (4) as board-like drawing and pulling type structure, including two pieces of trapezoidal perpendicular limb steel plates (4c) and connecting pin
Axis (4e), two pieces of trapezoidal perpendicular limb steel plates (4c) are equipped with horizontal strip hole (4d), connect pin shaft (4e) from horizontal strip hole
It is passed through in the connecting hole of (4d) and connecting portion (1a), trapezoidal perpendicular limb steel plate (4c) is connected with connecting portion (1a).
2. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 1,
It is characterized by: the support inner core (1b) of the buckling restrained brace structure (1) is cross section, material is steel, is utilized
The elastic-plastic deformation of support inner core (1b) meets the Deformation Demands of beam body, improves the utilization rate of material.
3. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 1,
It is characterized by: the pre-embedded steel slab (4b) of the upper end of the trapezoidal perpendicular limb steel plate (4c) and beam body (2) bottom welds；Pre-embedded steel slab
It is provided on (4b) embedded bar (4a), embedded bar (4a) is anchored at beam body (2) inside upwards, connects to meet limit sliding
Connected components (4) and the connecting structure of beam body (2) requirement.
4. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 3,
It is characterized by: laminated rubber bearing (7) bottom is provided with bearing pad stone (6).
5. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 1,
It is characterized by: drag-line (10) uses high strength low relaxed steel strand wires, single beam nominal diameter is 15.24mm, and tensile strength is
1860MPa。
6. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 1,
It is characterized by: the buckling restrained brace structure (1) with connect between pin shaft (4e) and buckling restrained brace structure and activity
It is movable bolt fastening structure between hinge (5), the replacement requirement to buckling restrained brace structure can be met.
7. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 1,
It is characterized by: the design bearing capacity of the node (1e) and connecting portion (1a) connected with pin shaft (4e) is connect should be greater than buckling about
The ultimate bearing capacity of bundle branch support structure (1) makes node (1e) and connecting portion (1a) keep elasticity, avoids node (1e) and connection
Position (1a) enters surrender in advance, guarantees that buckling restrained brace structure (1) effectively works.
8. a kind of combined multi-stage antidetonation bridge anticollision and fall girder apparatus based on BRB technology according to claim 1,
It is characterized by: in initial makeup location, connection pin shaft (4e) is located at the middle position of horizontal strip hole (4d), can be
Sliding, can meet the small displacement demand of beam body (2) in horizontal strip hole (4d), at this point, drag-line (10) in not tension and not by
The free state of pressure, relaxed length be horizontal strip hole (4d) and the separation delta that connect pin shaft (4e)1With buckling-restrained branch
The ultimate elongation value Δ of support structure (1)2The sum of；In the case of normal operation or small shake, beam body (2) occurs along bridge to displacement,
The connection pin shaft (4e) for limiting the component (4) that is slidably connected can move freely in horizontal strip hole (4d), meet temperature, wind
Deformation Demands in the case of load and small shake；Under middle shake effect, the relative displacement of beam body (2) and abutment (3) increases, when limit is slided
When any end is with pin shaft (4e) contact is connect in the both ends horizontal strip hole (4d) in dynamic connection component (4), activation buckling is about
Bundle branch support structure (1) is plastically deformed come the seismic energy that dissipates by buckling restrained brace structure (1), and then effectively prevent bridge
Beam is fallen, the risk of collision of beam body (2) and abutment (3) is reduced；Under big shake effect, when beam body (2) is opposite with abutment (3)
Split displacement increase is larger, is more than the deformability of buckling restrained brace structure (1), i.e. buckling restrained brace structure (1) fails,
Drag-line (10) plays a role at this time, reduces beam body (2) length travel, greatly reduces beam body (2) and fall beam risk；And it is closed when opposite
When resultant displacement continues to increase, the compressive deformation value of buckling restrained brace structure (1) persistently increases, at this time the rubber on abutment (3)
Pad (11) plays a role, and alleviates the collision effect between beam body (2) and abutment (3).
9. a kind of -8 any combined multi-stage antidetonation bridge anticollisions based on BRB technology and falling according to claim 1
Boom device, it is characterised in that: using the bridge pier substitution any combined multi-stage antidetonation bridge anticollision of claim 1-8 and fall
Buckling restrained brace structure (1) and drag-line (10) are arranged between beam body (2) and bridge pier abutment (3) in boom device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073817.6A CN109083000B (en) | 2018-09-14 | 2018-09-14 | Combined type multistage anti-collision and beam-falling device for anti-seismic bridge based on BRB technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073817.6A CN109083000B (en) | 2018-09-14 | 2018-09-14 | Combined type multistage anti-collision and beam-falling device for anti-seismic bridge based on BRB technology |
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| Publication Number | Publication Date |
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| CN109083000A true CN109083000A (en) | 2018-12-25 |
| CN109083000B CN109083000B (en) | 2020-05-29 |
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| CN201811073817.6A Expired - Fee Related CN109083000B (en) | 2018-09-14 | 2018-09-14 | Combined type multistage anti-collision and beam-falling device for anti-seismic bridge based on BRB technology |
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| CN113983121A (en) * | 2021-10-14 | 2022-01-28 | 石家庄铁道大学 | Self-resetting bridge damping device based on buckling restrained bellows and manufacturing method thereof |
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| CN111305044B (en) * | 2020-03-31 | 2021-07-13 | 河南翔瑞路桥工程有限公司 | Bridge damping device and using method thereof |
| CN112575674A (en) * | 2020-12-16 | 2021-03-30 | 石家庄铁道大学 | Combined multistage three-dimensional anti-seismic bridge limiting device based on BRB technology |
| CN113983121A (en) * | 2021-10-14 | 2022-01-28 | 石家庄铁道大学 | Self-resetting bridge damping device based on buckling restrained bellows and manufacturing method thereof |
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