CN108894102A - A kind of high-bearing capacity shock isolating pedestal and its manufacturing method - Google Patents
A kind of high-bearing capacity shock isolating pedestal and its manufacturing method Download PDFInfo
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- CN108894102A CN108894102A CN201811012541.0A CN201811012541A CN108894102A CN 108894102 A CN108894102 A CN 108894102A CN 201811012541 A CN201811012541 A CN 201811012541A CN 108894102 A CN108894102 A CN 108894102A
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- steel plate
- bearing capacity
- junction steel
- elastomer
- shock isolating
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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
- E01D19/04—Bearings; Hinges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of high-bearing capacity shock isolating pedestals, including outer junction steel plate, interior junction steel plate, stiffened steel plates, elastomer, setting elastomer is overlapped between two interior junction steel plates and stiffened steel plates, two interior junction steel plates are fixedly connected with corresponding outer junction steel plate respectively；It is characterized in that：It further include elastic washer, the elastic washer setting is between the stiffened steel plates and between stiffened steel plates and interior junction steel plate；The interior junction steel plate, stiffened steel plates, elastic washer are provided with location hole, the location and installation for three；The interior junction steel plate, stiffened steel plates are provided with the elastomer in the gap between elastic washer, are provided with the elastomer in the location hole of three.Shock isolating pedestal of the invention can be realized effectively to the isostructural damping of bridge and high-bearing capacity.
Description
Technical field
The invention belongs to engineering antivibration areas, and in particular to a kind of high-bearing capacity shock isolating pedestal and its manufacturing method.
Background technique
In engineering field, such as science of bridge building, bridle iron, the spherical shape branch of a large amount of non-shock insulation function were applied in the past
Seat, under the action of performance load on bridge can not effective shock insulation, the destruction of bridge structure is especially easy to cause in earthquake.
It is domestic at present laminated rubber bearing mainly include General Purpose Rubber support, lead core rubber support and high-damping rubber
Glue support etc..
As shown in fig. 1, it is shown that the structure of conventional General Purpose Rubber support.This rubber support divides multilayer steel plates 1
Cloth is embedded in rubber 2 and is made, and upper and lower surface is all rubber layer, and overall performance is rectangle or circular section shape.Due to
Bridge fine strain of millet bottom is not directly connected to, therefore this support easily has skidded phenomenon, influences bridge structure safe.Especially when generation earthquake
When, since support and bridge do not connect into together, situations such as being easy to appear support sliding, fall off, shock insulation work cannot be played
With.In addition, the damping ratio of this rubber support generally only has 5% or so, shock insulation ability is poor, it is difficult to which the earthquake for reducing structure is anti-
It answers.
The structure of the lead rubber bearing of the prior art is shown in Fig. 2.As shown in Figure 2, the lead-rubber branch
Seat includes bilevel outer junction steel plate 1 ', and support core is coupled with outer junction steel plate 1 ' respectively by upper and lower sealing plate 2 ', and
Shear key 5 ' is provided between sealing plate and outer junction steel plate to drive support to generate the relative displacement in horizontal direction.It is described
Stiffened steel plates 3 ' intersecting of the support core by rubber layer 6 ' and for improving vertical bearing capacity is formed, and along vertical direction
Multiple lead for retractable pencil sticks 4 ' are inserted with to further increase the damping capacity of support entirety.For support entirety, can behave as rectangle or
Circular section shape.Wherein lead for retractable pencil layer 4 ' is directly linked between two layers of outer junction steel plate, and stiffened steel plates 3 ' equally pass through envelope
Plate 2 ' is simultaneously connected using soket head cap screw 7 ' with outer junction steel plate 1 '.The assembling for completing outer junction steel plate and its core it
Afterwards, it is connected respectively with the pier top of the beam bottom of bridge and bridge pier by sleeve bolt 8 ', thus plays vibration damping as bridge pad
Effect.This lead core rubber support has the performance of common laminated rubber bearing, while solving common laminated rubber bearing and existing
Deficiency present in terms of antidetonation.However, this lead core rubber support vertical bearing capacity is poor, and to improve the damping of support
Than needing to be added lead for retractable pencil in the holder to achieve the effect that reduce structural seismic response.But lead is heavily contaminated metal, no matter
Lead metal, which can leak outside, in production process or use process causes biggish pollution to environment, has made both at home and abroad to lead at present
With there is a very stringent limitation, therefore lead core rubber support disagrees current environmentally friendly trend.Moreover, lead rubber bearing
Rapid curing phenomenon can occur for rubber at low temperature, and tired failure by shear can occur for lead for retractable pencil stick under Frequency Cyclic Static Loading,
To make the damping of support be greatly reduced.
The structure of the common high-damping isolation rubber support of the prior art is shown in Fig. 3.As shown in Figure 3, the rubber
Support includes the outer junction steel plate 11 of upper layer and lower layer, and (core is alternately laminated by stiffened steel plates 13 and high-damping rubber layer 15 for core
Formed) couple respectively with outer junction steel plate 11 by upper and lower sealing plate 12 and using soket head cap screw 16, and in sealing plate and outer connection
Shear key 14 is provided between steel plate.After the assembling for completing external connection steel plate and its core, by sleeve bolt 17 with
Bridge Beam bottom is connected.For this rubber support, preferable isolating affection, damping ratio can be reached it is not necessary that lead for retractable pencil is added
Up to 20% or more.However, its vertical bearing capacity is poor, it is difficult to meet load-bearing in large-span continuous girder bridges and most cable-stayed bridges and wants
It asks.
Currently, in large-span continuous girder bridges, since superstructure is from great, earthquake isolating equipment is very huge usually using volume
Big rubber support is to bear vertical load, and when erection support needs very big space, and installation procedure is very complicated, construction
Get up very inconvenient.For all kinds of shock isolating pedestals traditional at present, during such bridge construction or completion is put into
After use, if there is due to geology change or seismic fortification intensity change the case where, replacing time is difficult.?
In cable-stayed bridge, entire bridge structure generallys use half float system, since superstructure is from great, natural vibration period is long, usually adopts
With bridle iron and Damper Control displacement structure, however higher cost.
Summary of the invention
For at least one of prior art the above defects or improvement requirements, the present invention provides a kind of high-bearing capacity every
Support and its manufacturing method are shaken, which can effectively realize to the isostructural damping of bridge and high-bearing capacity, and have
For damping, appropriate, Bit andits control ability by force, is easily replied certainly, durability is prominent, constructs the advantages that convenient.
To achieve the above object, according to one aspect of the present invention, a kind of high-bearing capacity shock isolating pedestal is provided, including outer
Junction steel plate, interior junction steel plate, stiffened steel plates, elastomer, overlap between two interior junction steel plates setting elastomer and plus
Strength steel plate, two interior junction steel plates are fixedly connected with corresponding outer junction steel plate respectively；It is characterized in that：
It further include elastic washer, the elastic washer is arranged between the stiffened steel plates and stiffened steel plates and interior connection
Between steel plate；
The interior junction steel plate, stiffened steel plates, elastic washer are provided with location hole, the location and installation for three；
The interior junction steel plate, stiffened steel plates are provided with the elastomer, the institute of three in the gap between elastic washer
It states and is provided with the elastomer in location hole.
Preferably, be provided with keyway in the middle part of the interior junction steel plate, be provided in the keyway with the outer junction steel plate it
Between shear connector.
Preferably, the elastomer is polyurethane elastomer；Preferably, the elastic washer uses phase with the elastomer
Same material.
To achieve the above object, second aspect according to the invention also provides a kind of modification of high-bearing capacity shock isolating pedestal
Method for preparing polyurethane elastic body, it is characterised in that：
Step S1, the preparation of A material：
TDI performed polymer is preheated first, performed polymer pumping is expected after expecting to add, to vacuumize while stirring into A tank,
It closes A material to stir, observation lamp visor, bubble-free in tank, then quiet pumping；
Step S2, the preparation of B material：
MOCA solid particle is heated to it to dissolve, and takes out and expects after expecting to add, to vacuumize while stirring into B tank, is heated up
It is kept the temperature；
Step S3, mixed preparing：
By the TDI performed polymer prepared in step S1-2 and MOCA by weight 100：10~25 carry out mixed preparing.
Preferably, in step S1, preheating temperature is 80~85 DEG C；It is preferred that vacuumize 30~35 minutes, it is preferably quiet take out 10~
15 minutes；
Preferably, in step S2,120 DEG C~130 DEG C is warming up to and is kept the temperature.
To achieve the above object, the third aspect according to the invention also provides foregoing high-bearing capacity shock isolating pedestal
Preparation method, it is characterised in that：
Step A, the assembling before elastomer casting：
Coated with adhesive on the interior junction steel plate after the pre-treatment, stiffened steel plates, it is de- using coating in advance later
The assembly mold of mould agent carries out the elastic washer that machined the location hole and the interior junction steel plate, stiffened steel plates
Positioning assembling is integral, is then preheated；
Step B, it is poured modified polyurethane elastomer：
By the method for preparing modified urethane elastomer of foregoing high-bearing capacity shock isolating pedestal, required change is prepared
Property polyurethane elastomer；In gap between the interior junction steel plate, stiffened steel plates, elastic washer, the positioning of three
Kong Zhong, and with the gap of assembly mold, be poured the prepared modified polyurethane elastomer, fill up die cavity；
Step C, curing operation：
After casting complete, it is once vulcanized on vulcanization platform, after demoulding, then carries out post-cure；
Step D, cooling, deburring：
After natural cooling, deburring arrangement is carried out；
Step E, finished product is assembled：
The pretreated outer junction steel plate and the interior junction steel plate are finally assembled into finished product.
It preferably, further include the previously prepared step of polyurethane washer：
By the method for preparing modified urethane elastomer of foregoing high-bearing capacity shock isolating pedestal, required change is prepared
Property polyurethane elastomer be poured the configured modified polyurethane elastomer in gasket mould, the bullet is formed after solidification
Property washer (4).
It preferably, further include steel plate pre-treatment step：
It is machined out and smooths after the outer junction steel plate, interior junction steel plate, stiffened steel plates blanking, it is clear to carry out sandblasting
Reason；Wherein the outer junction steel plate also needs to carry out spray painting anti-corrosion and drying and processing.
Preferably, in step A, 85 DEG C~100 DEG C are preheated to；
Preferably, in step B, casting is filled up die cavity and is completed in 6~8 minutes.
Preferably, in step C, the primary heating temperature that vulcanizes is 110 DEG C~120 DEG C, the duration 1~2 hour；Secondary sulphur
Changing heating temperature is 110 DEG C~120 DEG C, the duration 4~5 hours.
Above-mentioned preferred feature can be combined with each other as long as they do not conflict with each other.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have below beneficial to effect
Fruit：
1, shock isolating pedestal of the invention can be realized effectively to the isostructural damping of bridge and high-bearing capacity, and have resistance
Buddhist nun is appropriate, Bit andits control ability by force, is easily replied certainly, durability is prominent, constructs the advantages that convenient.
2, shock isolating pedestal of the invention has enough vertical rigidities to bear vertical load, also has higher damping ratio to damage
Energy consumption；The pressure of superstructure can be reliably delivered to pier；In addition, have good elasticity to adapt to the rotation of beam-ends,
And there is the biggish shear-deformable horizontal displacement to meet superstructure.
3, by high-bearing capacity shock isolating pedestal ontology elastomeric material ingredient and mass percent, special process it is suitable
Sequence and condition are set, by it is more test and practice have shown that, high-bearing capacity vibration-isolating system have biggish vertical bearing capacity,
When using face pressure 30MPa, vertical deformation is less than 1mm；Limit face pressure is greater than 210MPa, and vertical deformation is less than 10mm, vertical to carry
Power is 3 times of traditional rubber earthquake isolation support；Horizontal limeit cutting performance reaches 300% or more, and equivalent damping ratio reaches 15%.It is high
Bearing capacity earthquake isolating equipment effectively drops the kinetic energy for being converted into superstructure of most of seismic energy and the thermal energy of earthquake isolating equipment
Low superstructure seismic response displacement, the relatively traditional shock isolating pedestal of earthquake displacement response reduce by 20% or more, reduce flexible dress
The demand displacement set reduces expansion joint cost.In addition, under product miniaturization, same vertical bearing capacity, high-bearing capacity shock insulation branch
Pedestal product is smaller, and installation is convenient.
4, high-bearing capacity shock isolating pedestal of the invention possesses higher vertical bearing capacity to can be used for all regions newly-built
The vertical bogey of bridge and remake old bridge；At the same time, high-bearing capacity shock isolating pedestal also possesses level and subtracts isolation property, can
With the seismic isolation device for all kinds of newly building bridges in earthquake intensity area, the old bridge shock insulation in earthquake intensity area can be also used for, damping adds
Gu in transformation, the bridle iron for replacing original non-shock insulation function under the premise of original support arrangement height waits can not be changed, improved
The earthquake safety of old bridge.Such support can be corrosion-resistant, ageing resistance is good with Applicable temperature range for -20 DEG C~+60 DEG C, can
It is used in coastal area etc..
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the General Purpose Rubber support of the prior art；
Fig. 2 is the structural schematic diagram of the lead core rubber support of the prior art；
Fig. 3 is the structural schematic diagram of the high-damp rubber support of the prior art；
Fig. 4 is the structural schematic diagram of high-bearing capacity shock isolating pedestal of the invention；
Fig. 5 is the schematic top plan view of Fig. 4；
Fig. 6 be the non-cast elastomers of high-bearing capacity shock isolating pedestal of the invention before assembly structure diagram；
Fig. 7 is present invention process flow diagram；
Fig. 8 is the horizontal limeit testing shear performance curve graph of high-bearing capacity shock isolating pedestal of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.The present invention is described in more detail With reference to embodiment.
As Figure 4-Figure 6, a kind of high-bearing capacity shock isolating pedestal of the invention, including outer junction steel plate and support body, branch
Seat ontology includes interior junction steel plate 1, stiffened steel plates 2, elastomer 3.Outer junction steel plate is mutually opposed upper layer and lower layer, and is passed through
Multiple sleeve bolts are connected with the support construction at for example Bridge Beam bottom, bridge pier pier top etc.In support body, two interior companies
It connects and overlaps setting elastomer 3 and stiffened steel plates 2 between steel plate 1, the interior junction steel plate 1 is logical with corresponding outer junction steel plate respectively
The connectors such as connection bolt are crossed to be fixedly connected at connecting hole 7.
Further include elastic washer 4, the elastic washer 4 be arranged between the stiffened steel plates 2 and stiffened steel plates 2 with it is interior
Between junction steel plate 1.The interior junction steel plate 1, stiffened steel plates 2, elastic washer 4 are provided with location hole 5, for determining for three
Position installation.The interior junction steel plate 1, stiffened steel plates 2 are filled with the elastomer 3, three in the gap between elastic washer 4
The location hole 5 in be also filled with the elastomer 3.The elastomer 3 is polyurethane elastomer.Preferably, the elasticity
Washer 4 and the elastomer 3 use identical material.
For whole shock isolating pedestal, the circle that the high-bearing capacity support diameter range is 320mm~970mm is cut
Face shape, altitude range are 91mm~303mm.Preferably, it is provided with keyway 6 in the middle part of the interior junction steel plate 1, in the keyway 6
The shear connector being provided between the outer junction steel plate.To drive support to generate the relative displacement in horizontal direction, and phase
The ability of the anti-horizontal loading of support should be provided.In addition, the outer junction steel plate that each sealing plate is coupled can also being integrally formed
Thus structure is not easy to burn side, while the production convenient for support, I& M in production sulfidation.
Shock isolating pedestal of the invention can be realized effectively to the isostructural damping of bridge and high-bearing capacity, and have damping
Suitably, Bit andits control ability by force, is easily replied certainly, durability is prominent, constructs the advantages that convenient.
Shock isolating pedestal of the invention has enough vertical rigidities to bear vertical load, also has higher damping ratio to be lost
Energy；The pressure of superstructure can be reliably delivered to pier；In addition, have good elasticity to adapt to the rotation of beam-ends, and
With the biggish shear-deformable horizontal displacement to meet superstructure.
In view of various shock isolating pedestals in the prior art are there are Lack of support, construction complexity, constant wait not is replaced
Sufficient, the manufacturing process of high-bearing capacity shock isolating pedestal provided in the present invention is as follows.
See that Fig. 7, the method for preparing modified urethane elastomer of high-bearing capacity shock isolating pedestal of the invention are as follows.
Step S1, the preparation of A material：
TDI performed polymer is preheated first, i.e., original packing bucket is heated to 80~85 DEG C preferably 80 degrees Celsius using baking oven, it is ripe
Change the time about 6 hours, opens vacuum pump using casting machine and expect performed polymer into A tank, after expecting to add, side from A tank suction inlet hose pumping
Stirring side vacuumizes 30~35 minutes preferably 30 minutes, closes A material and stirs, observation lamp visor, basic bubble-free in tank, then quiet pumping
Preferably 10 minutes 10~15 minutes.
TDI performed polymer used, performance typical value are chosen as follows：NCO containing ratio takes 6.33%, viscosity 350 at 80 DEG C
MPa.s, appearance is pale yellow transparent thick liquid at 80 DEG C.The hardening physical property of TDI performed polymer is as follows：Hardness is 95 Shore
A, 100% stretch modulus are 12MPa, elongation percentage 350%, impact elasticity 42%.
Step S2, the preparation of B material：
MOCA solid particle is heated 105 DEG C simultaneously to dissolve to it, and opens vacuum pump from B tank suction inlet hose using casting machine
Pumping expects after expecting to add, to vacuumize while stirring into B tank, is warming up to 120 DEG C~130 DEG C and is kept the temperature, and preferably 120 DEG C.
The performance indicator of MOCA is chosen as follows：Step S3, mixed preparing：Moisture≤0.3%, OCA content≤0.1%,
MOCA content 86%.
By the TDI performed polymer prepared in step S1-2 and MOCA by weight 100：10~25 carry out mixed preparing.
See Fig. 6, foregoing high-bearing capacity shock isolating pedestal, preparation method is as follows.
Steel plate pretreatment：
It is machined out and smooths after the outer junction steel plate, interior junction steel plate 1,2 blanking of stiffened steel plates, it is clear to carry out sandblasting
Reason, surface sand-blasting grade are Sa2.5；Wherein the outer junction steel plate also needs to carry out spray painting anti-corrosion and drying and processing.
Polyurethane washer is previously prepared：
By the method for preparing modified urethane elastomer of foregoing high-bearing capacity shock isolating pedestal, required change is prepared
Property polyurethane elastomer be poured the configured modified polyurethane elastomer in gasket mould, the bullet is formed after solidification
Property washer 4.
Assembling before elastomer casting：
Coated with adhesive on the interior junction steel plate 1 after the pre-treatment, stiffened steel plates 2, later using coating in advance
The assembly mold of release agent will machined the elastic washer 4 and the interior junction steel plate 1, stiffened steel plates of the location hole 5
2 carry out positioning assembling it is integral, then carry out being preheated to 85 DEG C~100 DEG C preferably 85 DEG C.
Adhesive technique requires as follows：It is used alone through 90 ° of disbonded tests, 213 thickness of dry film 19.05- of Chemlok
31.75um is greater than 17N/mm with metal adhesive mean peel strength；It is used as primary coat 12.7um with the use of Chemlok 219,
213 face Chemlok applies 20um and metal adhesive mean peel strength is greater than 25N/mm.
It is poured modified polyurethane elastomer：
By the method for preparing modified urethane elastomer of foregoing high-bearing capacity shock isolating pedestal, required change is prepared
Property polyurethane elastomer；In gap between the interior junction steel plate 1, stiffened steel plates 2, elastic washer 4, three's is described fixed
In the hole 5 of position, and with the gap of assembly mold, the poly- ammonia of the modification is poured in 6~8 minutes preferably 6 minutes along mold wall
Ester elastomer fills up die cavity.
Curing operation：
After casting complete, it is once vulcanized on vulcanization platform, heating temperature is 110 DEG C~120 DEG C preferred
110 DEG C, 1~2 hour duration preferably 1 hour；After demoulding, then post-cure is carried out, heating temperature is 110 DEG C~120 DEG C
It is preferred that 110 DEG C, 4~5 hours duration preferably 4 hours.
Cooling, deburring：
After natural cooling, deburring arrangement is carried out.
Assemble finished product：
The pretreated outer junction steel plate and the interior junction steel plate 1 are finally assembled into finished product.
The mounting process of finished product support requires as follows.
Sleeve preformed hole should be arranged in bridge pier bearing pad stone, and the diameter and depth in hole should be than sleeve or the diameters and length of screw rod
Big 50mm~60mm.Susceptor design center line is marked by design drawing on bridge pier bearing pad stone.Integral hoisting support, installation set
Cylinder and bolt.Centering vertical, horizontal design centre position is in place, reserves sleeve insertion pinner in sleeve hole, with four pieces of gad blocks
Support level is adjusted to designed elevation.Reserved sleeve hole and base-plate bed course is perfused with epoxy resin mortar or non-shrink mortar, to
Four pieces of steel wedges are removed after mortar hardening, and fill up vacancy with mortar, and mortar requires perfusion closely knit.After bolt installs, brush is mended
One of epoxy zinc rich primer, and to touch-up paint at support depainting.It is poured support top plate as a part of cast-in-place beam forms.
It, can surrounding gap gauze or cork sheet filling between top plate and template for mortar leakage prevention.It is removed again when later form removal
It goes.
High-bearing capacity shock isolating pedestal of the invention applies horizontal loading at compressed stress 35MPa, has carried out horizontal pole
Testing shear performance is limited, shearing main performance is as shown in Figure 8.In test support horizontal displacement reach 125mm (>300% cuts and answers
Become) when, support still remains intact, and meets the Ultimate Shear deformation of regulation support in rubber support specification not less than rubber total thickness
The requirement of degree 300%.This illustrates that the ultimate shear of high-bearing capacity shock isolating pedestal of the invention meets the requirements.
High-bearing capacity shock isolating pedestal of the invention has the following advantages that.
Vertical bearing capacity is big, deformation is small.There is high-bearing capacity vibration-isolating system biggish vertical bearing capacity to use face pressure
30MPa, vertical deformation are less than 1mm；Limit face pressure is greater than 210MPa, and vertical deformation is less than 10mm.Vertical bearing capacity is traditional rubber
3 times of glue shock isolating pedestal；Horizontal limeit cutting performance reaches 300% or more, and equivalent damping ratio reaches 15%.
Earthquake displacement response is small, and cost performance is high.High-bearing capacity earthquake isolating equipment is converted into top for most of seismic energy
The kinetic energy of structure and the thermal energy of earthquake isolating equipment, effectively reduce the displacement of superstructure seismic response, and earthquake displacement response is opposite
Traditional shock isolating pedestal reduces by 20% or more, reduces the demand displacement of telescopic device, reduces expansion joint cost.
It is convenient construction, easy to change.Under product miniaturization, same vertical bearing capacity, high-bearing capacity shock isolating pedestal volume is more
Small, installation is convenient.
Material transparent degree is high, and structure is visual；Durability is good；Resistance to ozone, anti-aging simultaneously, temperature dependency is small.
High-bearing capacity shock isolating pedestal of the invention is applied widely.High-bearing capacity shock isolating pedestal, which possesses, higher vertically to be held
Loading capability can be used for the vertical bogey of all regions newly building bridge and remake old bridge；At the same time, high-bearing capacity shock insulation
Support also possesses level and subtracts isolation property, can be used for the seismic isolation device of all kinds of newly building bridges in earthquake intensity area, can also use
In the old bridge shock insulation in earthquake intensity area, damping reinforcement transformation, it is former that replacement under the premise of original support arrangement height waits can not be changed
The bridle iron for the non-shock insulation function having improves the earthquake safety of old bridge.Such support can be with Applicable temperature range for -20 DEG C
It is~+60 DEG C, corrosion-resistant, ageing resistance is good, it can be used in coastal area etc..
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of high-bearing capacity shock isolating pedestal, including outer junction steel plate, interior junction steel plate, stiffened steel plates, elastomer, described in two
Overlap setting elastomer and stiffened steel plates between interior junction steel plate, two interior junction steel plates respectively with corresponding outer connection steel
Plate is fixedly connected；It is characterized in that：
It further include elastic washer, the elastic washer is arranged between the stiffened steel plates and stiffened steel plates and interior junction steel plate
Between；
The interior junction steel plate, stiffened steel plates, elastic washer are provided with location hole, the location and installation for three；
The interior junction steel plate, stiffened steel plates are provided with the elastomer in the gap between elastic washer, and three's is described fixed
Position is provided with the elastomer in hole.
2. high-bearing capacity shock isolating pedestal as described in claim 1, it is characterised in that：
It is provided with keyway in the middle part of the interior junction steel plate, the shear connector being provided between the outer junction steel plate in the keyway.
3. such as the described in any item high-bearing capacity shock isolating pedestals of claim 1-2, it is characterised in that：
The elastomer is polyurethane elastomer；Preferably, the elastic washer and the elastomer use identical material.
4. a kind of method for preparing modified urethane elastomer of high-bearing capacity shock isolating pedestal, it is characterised in that：
Step S1, the preparation of A material：
TDI performed polymer is preheated first, performed polymer pumping is expected after expecting to add, to vacuumize while stirring into A tank, closes A
Material stirs, observation lamp visor, bubble-free in tank, then quiet pumping；
Step S2, the preparation of B material：
MOCA solid particle is heated to it to dissolve, and takes out and expects after expecting to add, to vacuumize while stirring into B tank, heating carries out
Heat preservation；
Step S3, mixed preparing：
By the TDI performed polymer prepared in step S1-2 and MOCA by weight 100：10~25 carry out mixed preparing.
5. the method for preparing modified urethane elastomer of high-bearing capacity shock isolating pedestal as claimed in claim 4, feature exist
In：
In step S1, preheating temperature is 80~85 DEG C；It is preferred that vacuumize 30~35 minutes, it is preferably quiet to take out 10~15 minutes；
Preferably, in step S2,120 DEG C~130 DEG C is warming up to and is kept the temperature.
6. the preparation method of high-bearing capacity shock isolating pedestal as described in any one of claims 1-3, it is characterised in that：
Step A, the assembling before elastomer casting：
Coated with adhesive on the interior junction steel plate after the pre-treatment, stiffened steel plates, later using coating release agent in advance
Assembly mold, the elastic washer that machined the location hole and the interior junction steel plate, stiffened steel plates are positioned
It assembles integral, is then preheated；
Step B, it is poured modified polyurethane elastomer：
By the method for preparing modified urethane elastomer of the described in any item high-bearing capacity shock isolating pedestals of claim 4-5, system
Standby required modified polyurethane elastomer；In gap between the interior junction steel plate, stiffened steel plates, elastic washer, three
The location hole in, and with the gap of assembly mold, be poured the prepared modified polyurethane elastomer, fill up mould
Chamber；
Step C, curing operation：
After casting complete, it is once vulcanized on vulcanization platform, after demoulding, then carries out post-cure；
Step D, cooling, deburring：
After natural cooling, deburring arrangement is carried out；
Step E, finished product is assembled：
The pretreated outer junction steel plate and the interior junction steel plate are finally assembled into finished product.
7. the preparation method of high-bearing capacity shock isolating pedestal as claimed in claim 6, it is characterised in that：
It further include the previously prepared step of polyurethane washer：
By the method for preparing modified urethane elastomer of the described in any item high-bearing capacity shock isolating pedestals of claim 4-5, system
Standby required modified polyurethane elastomer is poured the configured modified polyurethane elastomer, after solidification in gasket mould
Form the elastic washer.
8. the preparation method of high-bearing capacity shock isolating pedestal as claimed in claim 6, it is characterised in that：
It further include steel plate pre-treatment step：
It is machined out and smooths after the outer junction steel plate, interior junction steel plate, stiffened steel plates blanking, carry out abrasive jet cleaning；Its
Described in outer junction steel plate also need to carry out spray painting anti-corrosion and drying and processing.
9. the preparation method of high-bearing capacity shock isolating pedestal as claimed in claim 6, it is characterised in that：
In step A, it is preheated to 85 DEG C~100 DEG C；
Preferably, in step B, casting is filled up die cavity and is completed in 6~8 minutes.
10. the preparation method of high-bearing capacity shock isolating pedestal as claimed in claim 6, it is characterised in that：
In step C, the primary heating temperature that vulcanizes is 110 DEG C~120 DEG C, the duration 1~2 hour；Post-cure heating temperature
It is 110 DEG C~120 DEG C, the duration 4~5 hours.
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| CN114033904A (en) * | 2021-10-21 | 2022-02-11 | 中国海洋石油集团有限公司 | Elastic support and forming method thereof |
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