CN109778722A - A kind of T-type Bridge Seismic method - Google Patents
A kind of T-type Bridge Seismic method Download PDFInfo
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- CN109778722A CN109778722A CN201910257502.5A CN201910257502A CN109778722A CN 109778722 A CN109778722 A CN 109778722A CN 201910257502 A CN201910257502 A CN 201910257502A CN 109778722 A CN109778722 A CN 109778722A
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Abstract
The invention discloses a kind of T-type Bridge Seismic methods, by adding sliding equipment in T-type bridge lower end, T-type bridge is enabled to have horizontal sliding ability, plastic deformation structure is added in the two sides of T-type bridge simultaneously, the energy acted on to horizontal inertial force when consuming the vibration of T-type bridge, to reduce the horizontal inertial force that T-type bridge is transmitted to substructure, damping is realized.The pipeline of T-type bridge horizontal inertial force when the present invention is by changing vibration; and energy consumption is realized using the reciprocal transformation of plastic deformation structure; to reduce the downward transmitting of horizontal inertial force; on the one hand the earthquake displacement of T-type bridge superstructure can be controlled; on the other hand it can avoid T-type bridge substructure and generate excessive Earthquake Internal Force response; the quake-resistant safety for protecting pier and its basis, Aseismic Design and reinforcing to T-type bridge have important practical value.
Description
Technical field
The present invention relates to anti-seismic technology field, specially a kind of damping scheme for science of bridge building more particularly to a kind of T
Type Bridge Seismic method.
Background technique
The advantages that for prefabricated PC T-type bridge because structure is simple, stress is clear, easy for installation, in China's Mid and minor spans
It is widely used in bridge construction, early in the 1950s, China has just built many T-type bridges, this bridge type is to improving me
State's highway communication plays important function.Assembled T-type bridge mostly uses laminated rubber bearing to support superstructure, and board-like rubber
Glue support is generally arranged on pier pinner, and the girder of T-type bridge directly rests on laminated rubber bearing, therefore board-like rubber
Connectionless measure between glue support and pier beam pad stone.For the lateral displacement and plate of the girder beam body of T-type bridge under limitation geological process
Usually reinforced concrete block need to be arranged in pier cap beam or abutment platform cap two sides in the sliding of formula rubber support.
Reinforced concrete block and laminated rubber bearing be applied in combination be highway in China T beam bridge typical transverse bearing with
The way of restraint.Reinforced concrete block rigidity is big, deformation is small, in earthquake generally based on brittle shear failure, therefore plasticity
Under horizontal and energy dissipation capacity is very low, and laminated rubber bearing belongs to flexible member, and sliding is easy to happen in earthquake.Reinforcing bar
Concrete block design is too strong, and the generation that laminated rubber bearing can be hindered to slide causes substructure seismic response to increase severely；Design
Cross it is weak, then will lead to laminated rubber bearing sliding it is out of control, cause superstructure to take a seat or fall beam.Therefore, the gear of " rigidity "
Both block and the support of " flexibility " can not effectively cooperate, and mutually keep in check, mutually restrict instead.
Currently, the design for reinforced concrete block also lacks specification guidance, although reinforced concrete block can be certain
Degree restricted T type bridge girder displacement, but its rigidity is big, deformation is small, and brittle shear failure easily occurs under geological process,
So that the force path between the laminated rubber bearing of " flexibility " and the concrete block of " rigidity " is indefinite, rubber slat support
Flexibility be not enough to bear the horizontal inertial force of superstructure so that horizontal inertial force almost all from reinforced concrete block to
Substructure transmitting, once and brittle break occurs for mixed mud block, laminated rubber bearing sliding will be no longer limited, and then be caused
Excessive shear and sliding occur for laminated rubber bearing.It is found according to historical earthquake seimic disaster census, using in laminated rubber bearing
Small across footpath beam bridge Typical Seismic Damage form are as follows: generated after laminated rubber bearing sliding and fall beam earthquake, plate caused by excessive relative displacement
Formula rubber support and the brittle break of concrete block etc., it is clear that there are certain defects for traditional concrete block design, and
Mixed mud block itself does not have energy dissipation capacity, so that both concrete block and laminated rubber bearing cannot cooperate with effective work
Make.
Summary of the invention
In view of the above shortcomings of the prior art, problem to be solved by this invention is how to provide a kind of T-type Bridge Seismic
Method, to reduce T-type bridge in vibration to the brittle break of substructure.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
A kind of T-type Bridge Seismic method enables T-type bridge to have level by adding sliding equipment in T-type bridge lower end
Sliding ability, while plastic deformation structure is added in the two sides of T-type bridge, to consume the horizontal inertial when vibration of T-type bridge
The energy of power effect realizes damping to reduce the horizontal inertial force that T-type bridge is transmitted to substructure.
In this way, enabling it when shaking by transverse direction by enabling T-type bridge to have horizontal sliding ability
Horizontal inertial force acts on the plastic deformation structure for passing to two sides, the pipeline of T-type bridge horizontal inertial force when changing vibration,
And energy consumption is realized using the reciprocal transformation of plastic deformation structure, to reduce the downward transmitting of horizontal inertial force, Jin Erda
To the purpose of shock-absorbing protecting.
Preferably, the T-type Bridge Seismic method implements damping to T-type bridge using following shock-damping structure, described
Shock-damping structure includes the mounting assembly for placing T-type bridge, and mounting assembly includes pier bearing pad stone and is located at pier support
The sliding bearing of pinner upper end, and the sliding bearing can transversely and horizontally slide on pier bearing pad stone；In mounting assembly
Both ends be respectively equipped with baffle plate assembly, mounting assembly is stretched out simultaneously for connecting with the side of T-type bridge in baffle plate assembly upper end, baffle
Component includes stiffener, parapet wall formula top plate and parapet wall formula bottom plate, and stiffener is used to connect with T-type bridge on one side, and stiffener is another
For connecting with parapet wall formula top plate, parapet wall formula bottom plate is fixed on the bent cap of T-type bridge in face；Baffle plate assembly further includes plasticity abdomen
Plate, the upper and lower ends of plasticity web are connected on parapet wall formula top plate and parapet wall formula bottom plate.
The working principle for the shock-damping structure that the present invention uses is:
When an earthquake occurs, sliding bearing can transversely and horizontally slide on pier bearing pad stone, so that T-type bridge can be relative to
The sliding of pier bearing pad stone level passes to most horizontal inertial force and T-type bridge during T-type bridge slides
The stop component of connection, so that the shear-deformable of geological process downslide board support is limited, in addition, the most water of T-type bridge
Flat inertia force will first pass to the stiffener connecting with T-type bridge, and stiffener again transmits horizontal inertial force through parapet wall formula top plate
Plasticity web is given, plasticity web needs to be made using the material for having good ductility and surrender property, and thus, it is possible to make water
Flat inertia force realizes the consumption of energy after the ductile deformation of plasticity web and intensity surrender, so that being transmitted to lower part
Horizontal inertial force greatly reduces.
The beneficial effect is that:
The present invention is by the pipeline of change T-type bridge horizontal inertial force, and when so that earthquake occurring, T-type bridge is generated big
Partial horizontal inertial force from the stop component that sliding bearing is transferred to two sides, by stop component plasticity web it is reciprocal
Energy dissipation behavior consumes the horizontal inertial force of T-type bridge and constrains the lateral displacement of T-type bridge, passes through the surrender of plasticity web, limit
The transmitting of the inertia force of T-type bridge processed structure to the lower part, protects substructure from eaerthquake damage, and then reached limitation slide plate
The purpose that support deformation and reduction horizontal inertial force transmit downwards, reduction fall beam earthquake and bring to mounting assembly and stop component
Brittle break the problems such as.
Preferably, sliding bearing is teflon sliding bearing.
Polytetrafluoroethylene (PTFE) is referred to as " King ", since the general weather conditions in place of installation T-type bridge are very severe,
And use teflon sliding bearing made of polytetrafluoroethylene (PTFE) that there is high temperature resistant (to use operating temperature up to 250 when in use
DEG C), it is low temperature resistant (have good mechanical tenacity；Drop temperature to -196 DEG C, 5% elongation can also be kept), weatherability
(optimal aging life-span in plastics), do not adhere to (being the smallest surface tension in solid material, do not adhere to any substance) etc.
Very excellent characteristic can effectively adapt to these harsh climate conditions and be unlikely to teflon sliding bearing
Performance has an impact, while teflon sliding bearing also has high lubrication (being coefficient of friction the lowest in solid material)
Characteristic, so when an earthquake occurs, since polytetrafluoroethylene (PTFE) is that coefficient of friction is minimum in all solids material, therefore T-type bridge
Can be generated when being slided on teflon sliding bearing it is biggish move horizontally so that T-type bridge can will be as more as possible
Horizontal inertial force pass to stop component, to the greatest extent limit geological process under teflon sliding bearing shearing become
Shape.
Preferably, plasticity web is using plasticity web made of mild steel thin plate.
Mild steel (mild steel), one of mild steel class, phosphorus content is lower, the slightly smaller steel of hardness.(reference: phosphorus content
0.13%~0.20%) microscopic structure is that ferrite adds a small amount of pearlite, and feature is that hardness is low (HB is 100~130), the low (σ of intensity
B is 372~470MPa), plasticity is high (δ is 24%~36%).Therefore also had using plasticity web made of mild steel thin plate above-mentioned
Characteristic, when an earthquake occurs, the horizontal inertial force that T-type bridge generates are transmitted at plasticity web, as made of mild steel thin plate
Plasticity web hardness is low, therefore the plasticity web quickly can absorb the horizontal inertial force passed over by biggish deformation,
Simultaneously because plasticity web plasticity made of mild steel thin plate is high, therefore plasticity web can be cracking extensive after absorbing horizontal inertial force
Original shape is arrived again and is unlikely to cause irreversible deformation.Mild steel is also a kind of very common material simultaneously, whole to add
Work production cost is low.
Preferably, plasticity web is more seam plasticity webs, and stitch offers a plurality of slit on plasticity web more, stitch plasticity abdomen more
Parallel being vertically provided at of a plurality of slit on plate is stitched on plasticity webs more.
A plurality of elongated slit is opened up on mostly seam plasticity web, and plasticity is stitched in narrow parallel being vertically provided at of a plurality of seam more
On web, when the horizontal inertial force of T-type bridge is transmitted at more seam plasticity webs, horizontal inertial force is on mostly seam plasticity web
It is to be transmitted from top to bottom in vertical direction, and stitch plasticity web is the deformation by itself to absorb the horizontal inertial passed over more
Power, the design of elongate slit allow more seam plasticity webs to have bigger space in deformation, are compared to using whole
For the plasticity web of block can only be deformed to both ends, it is can be absorbed more in the bigger deformation spaces of plasticity web that stitch more
Horizontal inertial force further decreases the horizontal inertial force for being transmitted to lower part, while also guaranteeing in vertical bridge to T-type bridge under horizontal loading
Liang Sicheng is not limited and plasticity web do not generate vertical bridge to deformation.
Preferably, the one side that is used to connect with T-type bridge in stiffener is equipped with connecting and contact with the side of T-type bridge
Rubber pad.
On the one hand rubber pad is used to directly contact with T-type bridge, to guarantee between entire stop component and T-type bridge
Positional relationship, while rubber pad has very high elasticity, when an earthquake occurs, rubber pad can also play one to the transmitting of seismic force
Fixed buffer function.
Preferably, rubber pad with a thickness of 2-3cm.
Preferably, 3 block-shaped protrusions are correspondingly arranged on the parapet wall formula top plate and parapet wall formula bottom plate, it is convex in each bulk
The both ends risen are fixedly connected to plasticity web.
By being correspondingly arranged 3 block-shaped protrusions on parapet wall formula top plate and parapet wall formula bottom plate, while in each block-shaped protrusion
Both ends be fixedly connected with plasticity web, 6 blocks of plasticity webs are set between parapet wall formula top plate and parapet wall formula bottom plate altogether in this way, when
When the horizontal inertial force of T-type bridge is transmitted at plasticity web, 6 blocks of plasticity webs can effectively divide the horizontal inertial force
It dissipates, so that the horizontal inertial force that every block of plasticity web needs to absorb is reduced, effectively improves entire plasticity web to level
The absorptivity of inertia force further effectively reduces the horizontal inertial force for being transmitted to substructure.
Preferably, it is embedded with the double threaded screw extended transversely through in T-type bridge, offers sliding slot type on parapet wall formula top plate
Stiffener preformed hole, the both ends of double threaded screw sequentially pass through the stiffener preformed hole on stiffener and parapet wall formula top plate respectively, double
The both ends of head screw rod are fixed with nut；Parapet wall formula bottom plate is fixed on the bent cap of T-type bridge by high-strength bolt；Plasticity abdomen
The upper and lower ends of plate are respectively adopted stud and are fixed on parapet wall formula top plate and parapet wall formula bottom plate.
The connection of T-type bridge Yu stiffener and parapet wall formula top plate, one side double end are realized by double threaded screw and nut
The use of screw rod and nut effectively raises the reliability that T-type bridge is connect with stiffener and parapet wall formula, on the other hand, into
When the transmitting of row horizontal inertial force, since double threaded screw is embedded in T-type bridge, the horizontal inertial force of T-type bridge
Stiffener and parapet wall formula top plate effectively can be passed to more stable, and horizontal inertial force is further carried out by plasticity web
It absorbs, while the stiffener preformed hole of the sliding slot type opened up on parapet wall formula top plate, so that T-type bridge can be along stiffener preformed hole
Sliding slot direction moves radially, and it is unrestricted in the movement of radial direction to ensure that T-type bridge, while also guaranteeing in vertical bridge Xiang Shui
Under flat load T-type bridge displacement be not limited and plasticity web do not generate vertical bridge to deformation.
Preferably, the intensity of high-strength bolt, stud and double threaded screw needs to meet following relationship in use:
kτ hs ≥ nf y ；0.5mτ s ≥ nf y ；lσ t ≥ nf y ；
Wherein:k、m、lThe respectively total quantity of high-strength bolt 4, stud and double threaded screw；nFor the total quantity of plasticity web；τ hs 、τ s 、σ t The respectively shearing strength of high-strength bolt, the tensile strength of the shearing strength of stud and double threaded screw；f y It indicates
The yield point value of plasticity web.
Detailed description of the invention
In order to keep the purposes, technical schemes and advantages of invention clearer, the present invention is made into one below in conjunction with attached drawing
The detailed description of step, in which:
Fig. 1 is the main view of the shock-damping structure used in the preferred embodiment for the present invention；
Fig. 2 is the stereoscopic schematic diagram of the shock-damping structure used in the preferred embodiment for the present invention；
Fig. 3 is the side view of stop component in the shock-damping structure used in the preferred embodiment for the present invention.
Description of symbols: 1- pier bearing pad stone, 2- teflon sliding bearing, 3- parapet wall formula bottom plate, 4- are high-strength
Bolt, 5- parapet wall formula top plate, 6- stiffener, 7- stitch plasticity web, 8- double threaded screw, 9- stud, 10- rubber pad, 11- more
T-type bridge, 12- stiffener preformed hole.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
The present invention provides a kind of T-type Bridge Seismic method, this method by adding sliding equipment in T-type bridge lower end,
Enable T-type bridge to have horizontal sliding ability, while adding plastic deformation structure in the two sides of T-type bridge, to consume T
The energy of horizontal inertial force effect when type bridge shakes, thus reduce the horizontal inertial force that T-type bridge is transmitted to substructure,
Realize damping.
In this way, enabling it when shaking by transverse direction by enabling T-type bridge to have horizontal sliding ability
Horizontal inertial force acts on the plastic deformation structure for passing to two sides, the pipeline of T-type bridge horizontal inertial force when changing vibration,
And energy consumption is realized using the reciprocal transformation of plastic deformation structure, to reduce the downward transmitting of horizontal inertial force, Jin Erda
To the purpose of shock-absorbing protecting.
It, can be specifically real to T-type bridge using shock-damping structure as shown shown in Figure 1 and Figure 2 when the method for the present invention is implemented
Damping is applied, which includes the mounting assembly for placing T-type bridge 11, and mounting assembly includes 1 He of pier bearing pad stone
Sliding bearing positioned at 1 upper end of pier bearing pad stone, and the sliding bearing can transversely and horizontally be slided on pier bearing pad stone
It is dynamic；It is respectively equipped with baffle plate assembly at the both ends of mounting assembly, baffle plate assembly upper end is stretched out mounting assembly and can be connected with T-type bridge 11
It connects, baffle plate assembly includes stiffener 6, parapet wall formula top plate 5 and parapet wall formula bottom plate 3, and 6 one side of stiffener is used to connect with T-type bridge 11
It connects, for connecting with parapet wall formula top plate 5, parapet wall formula bottom plate 3 is fixed on the bent cap of T-type bridge 11 6 another side of stiffener；Baffle
Component further includes plasticity web, and the upper and lower ends of plasticity web are connected on parapet wall formula top plate 5 and parapet wall formula bottom plate 3.
When an earthquake occurs, since sliding bearing can transversely and horizontally slide on pier bearing pad stone, so that T-type bridge
11 can pass most horizontal inertial force during T-type bridge 11 slides relative to the horizontal sliding of pier bearing pad stone 1
The stop component connecting with T-type bridge 11 is passed, so that the shear-deformable of geological process downslide board support is limited, in addition, T-type
The most horizontal inertial force of bridge 11 will first pass to the stiffener 6 connecting with T-type bridge 11, and stiffener 6 is used by level again
Property power through parapet wall formula top plate 5 pass to plasticity web, plasticity web is needed using the material for having good ductility and surrender property
Material is made, and horizontal inertial force thus may be made to realize disappearing for energy after the ductile deformation of plasticity web and intensity surrender
Consumption, so that the horizontal inertial force for being transmitted to lower part greatly reduces.
The shock-damping structure that the present invention uses passes through the pipeline for changing 11 horizontal inertial force of T-type bridge, so that earthquake is sent out
When raw, the most horizontal inertial force that T-type bridge 11 generates passes through gear from the stop component that sliding bearing is transferred to two sides
The reciprocal energy dissipation behavior of plasticity web in block assembly consumes the horizontal inertial force of T-type bridge 11 and constrains the transverse direction of T-type bridge 11
Displacement, by the surrender of plasticity web, the transmitting of the inertia force of restricted T type bridge 11 structure to the lower part, protection substructure is exempted from
By eaerthquake damage, and then achieve the purpose that limit sliding bearing deformation and reduce horizontal inertial force to transmit downwards, reduction falls beam
Earthquake and the problems such as to mounting assembly and stop component bring brittle break.
The shock-damping structure overall construction that the present invention uses is simple, and cheap, construction technology is simple, with traditional reinforced concrete
Native block is with the bearing of laminated rubber bearing, it can be achieved that reciprocal energy consumption, on the one hand controls superstructure compared with constraining construction
Earthquake displacement prevents T-type bridge 11 from taking a seat beam, on the other hand can avoid substructure and generates excessive Earthquake Internal Force response,
The quake-resistant safety for protecting pier and its basis, Aseismic Design and reinforcing to T-type bridge 11 have important practical value.
As the preferred embodiment to sliding bearing, sliding bearing is teflon sliding bearing 2.
Due to needing sliding bearing that can transversely and horizontally slide on pier bearing pad stone, it is necessary to which sliding bearing itself is most
Can have lesser coefficient of friction well.Polytetrafluoroethylene (PTFE) is referred to as " King ", since the place of installation T-type bridge 11 is general
Weather conditions it is very severe, and use polytetrafluoroethylene (PTFE) made of teflon sliding bearing 2 when in use have resistance to height
It is warm (using operating temperature up to 250 DEG C), low temperature resistant (with good mechanical tenacity；- 196 DEG C are dropped temperature to, can also be protected
Hold 5% elongation), weatherability (optimal aging life-span in plastics), not adhere to (be the smallest surface in solid material
Power does not adhere to any substance) etc. very excellent characteristic, these harsh climate conditions can be effectively adapted to and be unlikely to pair
The performance of teflon sliding bearing 2 has an impact, while it (is solid that teflon sliding bearing 2, which also has high lubrication,
Coefficient of friction the lowest in material) characteristic, so when an earthquake occurs, since polytetrafluoroethylene (PTFE) is rubbed in all solids material
Wipe coefficient it is minimum, therefore T-type bridge 11 on teflon sliding bearing 2 slide when can generate it is biggish move horizontally, from
And enable T-type bridge 11 that horizontal inertial force as much as possible is passed to stop component, geological process is limited to the greatest extent
Lower teflon sliding bearing 2 it is shear-deformable.
To the further improvement of plasticity web in the present embodiment, plasticity web is using plasticity abdomen made of mild steel thin plate
Plate.
Mild steel (mild steel), one of mild steel class, phosphorus content is lower, the slightly smaller steel of hardness.(reference: phosphorus content
0.13%~0.20%) microscopic structure is that ferrite adds a small amount of pearlite, and feature is that hardness is low (HB is 100~130), the low (σ of intensity
B is 372~470MPa), plasticity is high (δ is 24%~36%).Therefore also had using plasticity web made of mild steel thin plate above-mentioned
Characteristic, when an earthquake occurs, the horizontal inertial force that T-type bridge 11 generates are transmitted at plasticity web, since mild steel thin plate is made
Plasticity web hardness it is low, therefore the plasticity web can carry out the quick horizontal inertial passed over that absorb by biggish deformation
Power, simultaneously because plasticity web plasticity made of mild steel thin plate is high, therefore plasticity web can be quickly after absorbing horizontal inertial force
Be restored to original shape and be unlikely to cause irreversible deformation.Mild steel is also a kind of very common material simultaneously, whole
It is low that body processes cost.
To the further improvement of plasticity web in the present embodiment, plasticity web with a thickness of 1-2mm.
If the thickness of plasticity web designs blocked up, then the deformation of plasticity web can be smaller, in this way to horizontal inertial
The absorption of power will be inadequate, so that the horizontal inertial force for being transmitted to substructure increases, if the thickness of plasticity web is excessively thin,
Under the action of horizontal inertial force, plasticity web deforms excessive irreversible deformation easy to form and then leads to the broken of plasticity web
It is bad.
To the further improvement of plasticity web in the present embodiment, plasticity web is more seam plasticity webs 7, stitch plasticity abdomen more
A plurality of slit is offered on plate 7, a plurality of slits stitched on plasticity web 7 parallel more to be vertically provided on more seam plasticity webs 7.
Preferred embodiment is that 5 elongated slits are offered on every piece mostly seam plasticity web 7, the about more seams of slit vertical height
The half of 7 total height of plasticity web.
A plurality of elongated slit is opened up on mostly seam plasticity web 7, and modeling is stitched in parallel being vertically provided at of a plurality of slit more
Property web 7 on, when the horizontal inertial force of T-type bridge 11 is transmitted at more seam plasticity webs 7, horizontal inertial force is in mostly seam plasticity
It is to be transmitted from top to bottom in vertical direction, and stitch plasticity web 7 is that the deformation of itself is leaned on to pass over to absorb more on web 7
Horizontal inertial force, the design of elongate slit allow more seam plasticity webs 7 to have bigger space in deformation, compare
For it can only be deformed to both ends using the plasticity web of monolith, the bigger deformation spaces of plasticity webs 7 that stitch make it can be with more
More horizontal inertial forces are absorbed, the horizontal inertial force for being transmitted to lower part is further decreased.
In the present embodiment, the preferred embodiment when stiffener 6 is connect with T-type bridge 11 is, stiffener 6 be used for
The one side that T-type bridge 11 connects is equipped with the rubber pad 10 for connecting and contacting with the side of T-type bridge 11, stiffener 6 and rubber pad
10 height having the same in vertical direction.
10 one side of rubber pad with T-type bridge 11 for directly contacting, to guarantee entire stop component and T-type bridge 11
Between positional relationship, while rubber pad 10 have very high elasticity, when an earthquake occurs, rubber pad 10 can also be to seismic force
Certain buffer function is played in transmitting.
In the present embodiment, the preferred embodiment of 10 thickness of rubber pad is, rubber pad 10 with a thickness of 2-3cm.
In the present embodiment, the preferred embodiment of parapet wall formula top plate 5 and parapet wall formula bottom plate 3 is parapet wall formula top plate 5 and parapet wall
It is correspondingly arranged on 3 block-shaped protrusions on formula bottom plate 3, is fixedly connected to plasticity web at the both ends of each block-shaped protrusion.
By being correspondingly arranged 3 block-shaped protrusions on parapet wall formula top plate 5 and parapet wall formula bottom plate 3, at the same it is convex in each bulk
The both ends risen are fixedly connected with plasticity web, and 6 pieces of plasticity abdomens are arranged altogether between parapet wall formula top plate 5 and parapet wall formula bottom plate 3 in this way
Plate, when the horizontal inertial force of T-type bridge 11 is transmitted at plasticity web, 6 blocks of plasticity webs can carry out the horizontal inertial force
Effective dispersion effectively improves entire plasticity abdomen so that the horizontal inertial force that every block of plasticity web needs to absorb is reduced
Plate further effectively reduces the horizontal inertial force for being transmitted to substructure to the absorptivity of horizontal inertial force.
In the preferred embodiment of the present embodiment, as shown in Fig. 3, pair extended transversely through is embedded in T-type bridge 11
Head screw rod 8, the stiffener preformed hole 12 of sliding slot type is offered on parapet wall formula top plate 5, the both ends of double threaded screw 8 sequentially pass through respectively
Stiffener preformed hole 12 on stiffener 6 and parapet wall formula top plate 5, the both ends of double threaded screw 8 are fixed with nut；Parapet wall formula bottom
Plate 3 is fixed on the bent cap of T-type bridge 11 by high-strength bolt 4；It is solid that stud 9 is respectively adopted in the upper and lower ends of plasticity web
It is scheduled on parapet wall formula top plate 5 and parapet wall formula bottom plate 3.
The connection of T-type bridge 11 Yu stiffener 6 and parapet wall formula top plate 5 is realized by double threaded screw 8 and nut, on the one hand
The use of double threaded screw 8 and nut effectively raises the reliability that T-type bridge 11 is connect with stiffener 6 and parapet wall formula, another
Aspect, when carrying out the transmitting of horizontal inertial force, since double threaded screw 8 is embedded in T-type bridge 11, T-type bridge
11 horizontal inertial force effectively can pass to stiffener 6 and parapet wall formula top plate 5 with more stable, and further pass through plasticity web
The absorption of horizontal inertial force, while the stiffener preformed hole 12 of the sliding slot type opened up on parapet wall formula top plate 5 are carried out, so that T-type
Bridge 11 can moving radially along 12 sliding slot direction of stiffener preformed hole, ensure that T-type bridge 11 radial direction movement not
Be restricted, at the same also guarantee to be not limited in vertical bridge to T-type bridge displacement under horizontal loading and plasticity web do not generate it is vertical
Bridge to deformation.
In the present embodiment preferred embodiment, the intensity of high-strength bolt 4, stud 9 and double threaded screw 8 needs in use
Meet following relationship:
kτ hs ≥ nf y ；0.5mτ s ≥ nf y ；lσ t ≥ nf y ；
Wherein:k、m、lThe respectively total quantity of high-strength bolt 4, stud 9 and double threaded screw 8；nFor the sum of plasticity web
Amount；τ hs 、τ s 、σ t The tension of the respectively shearing strength of high-strength bolt 4, the shearing strength of stud 9 and double threaded screw 8 is strong
Degree；f y Indicate the yield point value of plasticity web.
The present embodiment preferably applies the shock-damping structure of mode in use, under geological process, due to polytetrafluoroethylene (PTFE) slide plate branch
The coefficient of friction of seat 2 is small, so that the most horizontal inertial force of T-type bridge 11 passes to stop component, limits geological process
Lower teflon sliding bearing 2 it is shear-deformable, the most horizontal inertial force of T-type bridge 11 will be through double threaded screw 8 and rubber
Rubber mat 10 passes to parapet wall formula top plate 5, and the horizontal inertial force for being transmitted to parapet wall formula top plate 5 is further transferred to more seam plasticity webs
7, due to stitching the good ductility of plasticity web 7 and fatigue resistance, so that horizontal inertial force prolonging through excessive seam plasticity web 7 more
Property deformation and intensity surrender after realize energy consumption so that the horizontal inertial force for being transmitted to lower part greatly reduces, therefore
The shock-damping structure that the present invention uses passes through the pipeline for changing 11 horizontal inertial force of T-type bridge, so that most horizontal used
Property power is from the stop component that polytetrafluoroethylene bearing is transferred to two sides, and via the past of more seam plasticity abdomens 7 on stop component
Multiple energy consumption achievees the purpose that consumption level inertia force, has reached the deformation of limitation teflon sliding bearing 2 and reduction level is used
Property the purpose transmitted downwards of power, while the shock-damping structure overall construction that the present invention uses is simple, cheap, construction technology letter
It is single, it is compared with the bearing of laminated rubber bearing with constraint construction with conventional steel bar concrete block, it can be achieved that back and forth consume energy, a side
Face can control the earthquake displacement of T-type bridge superstructure, prevent T-type bridge from taking a seat beam, on the other hand can avoid T-type bridge
Substructure generates excessive Earthquake Internal Force response, the quake-resistant safety of pier and its basis is protected, to the Aseismic Design of T-type bridge
There is important practical value with reinforcing.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to excellent
Embodiment is selected to describe the invention in detail, those skilled in the art should understand that, it can be to of the invention
Technical solution is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered
In scope of the presently claimed invention.
Claims (10)
1. a kind of T-type Bridge Seismic method, which is characterized in that by adding sliding equipment in T-type bridge lower end, so that T-type bridge
Beam can have horizontal sliding ability, while add plastic deformation structure in the two sides of T-type bridge, to consume the shake of T-type bridge
The energy of horizontal inertial force effect when dynamic, to reduce the horizontal inertial force that T-type bridge is transmitted to substructure, realization subtracts
Shake.
2. T-type Bridge Seismic method as described in claim 1, which is characterized in that using following shock-damping structure to T-type bridge
Implement damping, the shock-damping structure includes the mounting assembly for placing T-type bridge, mounting assembly include pier bearing pad stone and
Sliding bearing positioned at pier bearing pad stone upper end, and the sliding bearing can transversely and horizontally be slided on pier bearing pad stone
It is dynamic；It is respectively equipped with baffle plate assembly at the both ends of mounting assembly, baffle plate assembly upper end is stretched out mounting assembly and is used for and T-type bridge
Side connection, baffle plate assembly include stiffener, parapet wall formula top plate and parapet wall formula bottom plate, and stiffener is used to connect with T-type bridge on one side
It connects, for connecting with parapet wall formula top plate, parapet wall formula bottom plate is fixed on the bent cap of T-type bridge stiffener another side；Baffle plate assembly
It further include plasticity web, the upper and lower ends of plasticity web are connected on parapet wall formula top plate and parapet wall formula bottom plate.
3. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that sliding bearing is polytetrafluoroethylene (PTFE) slide plate branch
Seat.
4. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that plasticity web of mild steel thin plate by being made
Plasticity web.
5. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that plasticity web with a thickness of 1-2mm.
6. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that plasticity web is more seam plasticity webs, stitch more
A plurality of slit is offered on plasticity web, plasticity webs are stitched in parallel being vertically provided at of a plurality of slits stitched on plasticity web more more
On.
7. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that be used to connect with T-type bridge in stiffener
It is equipped with the rubber pad for connecting and contacting with the side of T-type bridge on one side.
8. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that the parapet wall formula top plate and parapet wall formula bottom plate
On be correspondingly arranged on 3 block-shaped protrusions, be fixedly connected to plasticity web at the both ends of each block-shaped protrusion.
9. T-type Bridge Seismic method as claimed in claim 2, which is characterized in that be embedded with and extend transversely through in T-type bridge
Double threaded screw, parapet wall formula top plate two sides offer the stiffener preformed hole with sliding slot, and the both ends of double threaded screw sequentially pass through respectively
Stiffener preformed hole on parapet wall formula top plate, the both ends of double threaded screw are fixed with nut；Parapet wall formula bottom plate passes through high-strength spiral shell
Bolt is fixed on the bent cap of T-type bridge；The upper and lower ends of plasticity web be respectively adopted stud be fixed on parapet wall formula top plate and
On parapet wall formula bottom plate.
10. T-type Bridge Seismic method as claimed in claim 9, which is characterized in that high-strength bolt, stud and double end spiral shell
The intensity of bar needs to meet following relationship in use:
kτ hs ≥ nf y ；0.5mτ s ≥ nf y ；lσ t ≥ nf y ；
Wherein:k、m、lThe respectively total quantity of high-strength bolt 4, stud and double threaded screw；nFor the total quantity of plasticity web；τ hs 、τ s 、σ t The respectively shearing strength of high-strength bolt, the tensile strength of the shearing strength of stud and double threaded screw；f y It indicates
The yield point value of plasticity web.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863423A (en) * | 2019-11-28 | 2020-03-06 | 刘海洋 | Bridge butt joint anti-seismic device |
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