CN102287007B - Soft steel core rubber mat-steel spring combined seismic isolation supporting seat - Google Patents

Soft steel core rubber mat-steel spring combined seismic isolation supporting seat Download PDF

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Publication number
CN102287007B
CN102287007B CN 201110197052 CN201110197052A CN102287007B CN 102287007 B CN102287007 B CN 102287007B CN 201110197052 CN201110197052 CN 201110197052 CN 201110197052 A CN201110197052 A CN 201110197052A CN 102287007 B CN102287007 B CN 102287007B
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China
Prior art keywords
core rubber
steel core
mild steel
steel
rubber pad
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Expired - Fee Related
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CN 201110197052
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CN102287007A (en
Inventor
王浩
李爱群
吴继荣
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Southeast University
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Southeast University
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Abstract

The invention discloses a soft steel core rubber mat-steel spring combined seismic isolation supporting seat, which consists of an internal part and an external part, wherein the internal part is a soft steel core rubber mat; in the internal part, a high-performance soft steel core is adopted to replace a common lead core, so that the energy dissipation function of the conventional lead core rubber mat is achieved, and the adoption of a lead serving as a toxic substance is avoided; the external part is a high-intensity and high-bearing-capacity steel spring; the steel spring and the soft steel core rubber mat bear horizontal and vertical loads together, and the bearing capability and reset characteristic of the soft steel core rubber mat can be improved under the action of an inside band simultaneously; and the steel spring is always in a tight state in the using process, so that the action of the inside band is brought into full play. In consideration of the advantages of low manufacturing cost and superior performance of the novel combined seismic isolation supporting seat and along with the continuous importance to the seismic isolation design of an engineering structure worldwide and continuous development of infrastructure construction, the supporting seat can be widely applied to various engineering structures.

Description

Mild steel core rubber pad steel spring combination vibration absorption and isolation support
Technical field
The present invention relates to a kind of novel combination vibration absorption and isolation support, be specially adapted to adopt in the large scale civil engineering structure of earthquake-prone region, the seismic response with effective control structure reduces earthquake disaster.
Background technology
Earthquake is the burst type natural calamity that jeopardizes people's lives and properties, worldwide caused very heavy life and property loss, and China is one of many earthquakes country in the world.As the Tangshan violent earthquake on July 28th, 1976,7.8 grades of earthquake magnitudes, people surplus death reaches 240,000, the house in the meizoseismal area, industrial premises and equipment, urban construction, communications and transportation, hydroelectric facility etc. all are subjected to extremely serious destruction.The 8.0 grades of violent earthquakes in Wenchuan, Sichuan in May 12 this year, especially since the founding of New destructive the strongest, involve one earthquake widest in area, go even farther than Tangshan earthquake.These earthquakes have caused massive losses for the country and people's lives and properties.Abroad, as U.S. Northridge in 1994 earthquake, only 6.7 grades of earthquake magnitudes but cause 20,000,000,000 dollars of economic losses; The big earthquakes in Osaka and Kobe,Japan of nineteen ninety-five, 7.2 grades of earthquake magnitudes, dead 5466 people, the urban economy total losses reaches 1,000 hundred million dollars.Huge life and property loss makes whole world antidetonation worker study one after another and thinks deeply new effective seismic measures.Facts have proved that for earthquake disaster mitigation, the work of must providing fortification against earthquakes energetically is one of effective way that reduces the engineering structures earthquake disaster and structure subtracts isolation design.
The basic principle that engineering structures subtracts shock insulation is: damping is to utilize special cushioning members or device, makes it that rate is introduced into the plastic zone when macroseism, produces big damping, and a large amount of consumption enters the energy of structural system; Shock insulation then is to utilize vibration-isolating system, manages to stop seismic energy to enter agent structure.In practice, sometimes these two kinds of systems are united two into one.By select suitable to subtract, earthquake isolating equipment and the position is set, can reach the purpose of control structure distribution of internal force and size.Domestic and international for this reason technician has developed and has developed the earthquake isolating equipment that subtracts of many types, and wherein lead core rubber support (pad) is exactly one of wherein common isolation shock-damping rack.
Lead core rubber support (pad) forms by pour into lead for retractable pencil in the normal stack neoprene bearing, be that the New Zealand scholar was development in 1975 the earliest, this bearing has made full use of lead for retractable pencil good mechanical characteristic, comprises lower yield shear force and higher initial shear rigidity.Lead for retractable pencil pour into the early stage rigidity that can improve bearing, be beneficial to structural vibration controlled.Test shows that the initial shear rigidity of lead core rubber support is about 10 times of normal stack neoprene bearing rigidity.The area that increases lead for retractable pencil can improve the power consumption effect.Owing to combine laminated rubber bases and lead damper, thereby in engineering structures, be widely adopted.
Because lead is a kind of noxious material, a key issue in the lead core rubber support design seals lead exactly, to prevent plumbous leakage.Therefore, consider that adopting the performance materials similar that lead for retractable pencil is replaced is a kind of inevitable development trend from the angle of environmental protection.The selected mild steel core of this paper is to utilize the plastic strain of steel to consume energy, and its advantage is to make simplyr, and cost is relatively low, is easy to make according to actual needs different shape and solid durable, and energy dissipation capacity is strong.And mild steel is a kind of innocuous substance, and for plumbous, this is with the obvious advantage.In addition, along with the development of material science, constantly develop all kinds of novel high-performance mild steel in recent years, for the generation of mild steel core rubber pad is laid a good foundation.
For the engineering structures antidetonation, the energy dissipation capacity of its bearing is an of paramount importance index.Therefore, in order to improve the energy dissipation capacity of existing lead core rubber support, can consider at its outside cuff one mild steel plate.Yet cuff the bearing after the mild steel plate of back receive influence at the vertical earthquake isolating aspect of performance.In order to improve its vertical anti-seismic performance, can consider to change mild steel plate into steel spring, be easy to the compression, the cutting performance that produce relatively to make full use of steel spring.Obviously, for common mild steel core rubber pad, mild steel core rubber pad-steel spring combined isolator that cuff is crossed after the steel spring has bigger supporting capacity.In addition, restoring force is an another important indicator of weighing the isolation shock-damping rack performance.The powerful restoring force of outer hoop iron spring can reduce the distortion of combined isolator under geological process, greatly improves its level and vertical reseting performance.
Continuous development along with ferrous materials scientific research and production work, the kind of mild steel damper is more and more abundanter, the novel mild steel of various high-performance continues to bring out, the production of steel spring and spring fastening and bearing technology have also obtained significant progress, for mild steel core rubber pad-steel spring combined isolator of developing novel environment-friendly provides strong technical support.The price of above-mentioned these new materials also reduces gradually, has further strengthened its possibility of applying on a large scale.Along with studying every cushion technique and putting into practice deepening continuously of work, the combined isolation shock-damping rack with different characteristics will arise at the historic moment, and to reduce the structural earthquake response, assure the safety for life and property of the people.
Summary of the invention
Technical problem: the purpose of this invention is to provide the novel combination vibration absorption and isolation support of a kind of mild steel core rubber pad steel spring, this bearing has not only been avoided the employing of noxious material lead in the conventional lead-rubber pad, also improve its supporting capacity and reseting performance, can be widely used in to carry out in the middle of all kinds of major works structures of damping design by the encased steel spring.
Technical scheme: the technical solution adopted for the present invention to solve the technical problems is: this bearing comprises upper junction plate, sandwich clad steel, rubber, mild steel bar, steel spring, lower connecting plate; Wherein, sandwich clad steel, rubber phase intervening sequences are arranged, mild steel bar is passed sandwich clad steel, rubber is formed mild steel core rubber pad, upper junction plate is positioned at the top of this mild steel core rubber pad, lower connecting plate is positioned at the bottom of this mild steel core rubber pad, upper junction plate and lower connecting plate respectively with the upper and lower surface secure bond of mild steel core rubber pad, steel spring is positioned at the periphery of this mild steel core rubber pad; The adjacent wires of this steel spring closely links to each other, middle no gap.
Described steel spring in use is in the state of tightening always, to give full play to its cuff effect, improves mild steel core rubber pad supporting capacity and reset feature.Described upper junction plate is the polyfluortetraethylene plate sliding support.
Novel combination vibration absorption and isolation support of the present invention mainly comprises two systems: vertical actuating system and level are to dissipative system.Vertical actuating system refers to that bridge construction is conducted oneself with dignity and external force effect such as vehicular load and the vertical effect that produces is passed to bridge pier structure safely by this bearing, and upper junction plate, sandwich clad steel, rubber, steel spring and lower connecting plate have been formed this system.This wherein, steel spring is not participated in the transmission of vertical force directly, but it is lined with the effect of cuff to mild steel core rubber, so to the vertical bearing capacity effect of being greatly improved of mild steel core rubber pad.Level refers to that to dissipative system bridge construction is subjected under the external force effects such as earthquake and wind load; consume most energy by this bearing; thereby significantly reduce the energy that is input in the bridge construction; and then reaching the effect of protecting bridge construction, upper junction plate, mild steel bar, steel spring and lower connecting plate have been formed this system.When seismic force effects, the mild steel bar of this system and steel spring generation shear strain, thereby dissipation energy.In addition, bigger shear strain can take place in rubber pad under the shake effect doughtily, and the horizontal reset performance of bearing was put forward in the employing of steel spring.
When novel combination vibration absorption and isolation support of the present invention rotates because bridge construction is subjected to the external force effect, can form the stress of part tension or whole tensions, at this moment, can bring into play vertical control action with the steel spring that last lower connecting plate welds together, reduce the vertical tension of mild steel core rubber pad, and strengthen the vertical reseting performance of bearing.
Beneficial effect: the mild steel bar that is adopted among the present invention has that yield point is low, intensity stabilization, the low advantage that all anti-fatigue performances are good, elastoplasticity damping energy dissipation capacity is strong, and it is nontoxic, itself and steel spring are united use, can significantly improve the energy dissipation capacity of bearing, and can reach the control structure displacement, reduce the effect of bridge earthquake.
By existing lead-rubber pad is improved, form mild steel core rubber pad, and adopt steel spring that it is carried out tight cuff in the periphery, feasible this not only environmental protection more of novel combination vibration absorption and isolation support, and have superpower supporting capacity and reseting performance, that can well satisfy all kinds of major works structures subtracts the shock insulation demand.This susceptor design is simple simultaneously, cost is low, easy for installation, inexpensive, along with all kinds of engineering structuress in the worldwide to the attention of anti-seismic performance, this novel vibration absorption and isolation support will obtain widely engineering and use, society and economic benefits are limitless.
Description of drawings
Fig. 1 is the whole longitudinal profile organigram of seat structure of the present invention;
Fig. 2 is the sectional drawing at A-A place among Fig. 1;
Fig. 3 is an elevation of going up lower connecting plate;
Fig. 4 is the weld seam schematic diagram between steel spring and the last lower connecting plate.
Have among the figure: upper junction plate 1; Sandwich clad steel 2; Rubber 3; Mild steel bar 4; Steel spring 5; Lower connecting plate 6; Weld seam 7; High-strength bolt 8.
The specific embodiment
Mild steel core rubber pad steel spring combination vibration absorption and isolation support of the present invention: this bearing comprises upper junction plate 1, sandwich clad steel 2, rubber 3, mild steel bar 4, steel spring 5, lower connecting plate 6; Wherein, sandwich clad steel 2, rubber 3, mild steel bar 4 these three parts are formed mild steel core rubber pad; At peripheral cuff one steel spring 5 of mild steel core rubber pad, this steel spring 5 is processed into the outer shape that adjacent wires closely links to each other, and does not have the gap between the adjacent wires, and the upper junction plate 1 of the upper and lower side of this steel spring 5 and bearing and lower connecting plate 6 reliably weld.Last lower connecting plate links to each other by bonding with the upper and lower surface of mild steel core rubber pad respectively.Sandwich clad steel 2 processes a cylinder hole at the home position place of this rubber pad after forming the round rubber pad with rubber 3 layerings bonding, then cylindrical mild steel bar 4 is put into wherein, thereby is formed mild steel core rubber pad.The upper junction plate 1 of this bearing and lower connecting plate 6 are square so that with at the bottom of the beam and the built-in fitting at bridge pier end face place reliably link to each other with high-strength bolt 8.The whole longitudinal profile organigram of seat structure is seen Fig. 1.
The last lower connecting plate of this bearing is square, and mild steel core rubber pad is circular, steel spring 5 closely be wrapped in mild steel core rubber pad around, form and enclose tubular.Go up earlier the size of lower connecting plate well, and determine the size of mild steel core rubber pad and then the size of definite steel spring 5 by the designing requirement of energy-dissipating and shock-absorbing bridge according to the size design of bridge pier and bridge construction.When making this bearing, at first sandwich clad steel 2 and rubber 3 layerings are bonded together, sandwich clad steel 2 should meet relevant national standards with every layer thickness of rubber 3.On bonding rubber pad, make a cylindric hole that designs in advance then, again mild steel bar 4 is put into wherein.The steel spring 5 that on the outer race of the mild steel core rubber pad of making, processes in advance, to go up the upper and lower surface strong bond of lower connecting plate and mild steel core rubber pad at last gets up, and with weld seam 7 steel spring 5 and upper junction plate 1 and lower connecting plate 6 are coupled together respectively, steel spring 5 is seen Fig. 2 with the relative position of mild steel core rubber pad.The schematic diagram of weld seam is seen Fig. 4 between steel spring and the last lower connecting plate.
In the field-mounted process, upper junction plate 1, lower connecting plate 6 link to each other with embedded board at the bottom of the beam and the embedded board on the bridge pier with high-strength bolt 8 respectively, and the bolt hole position schematic diagram of last lower connecting plate is seen Fig. 3.After the bearing installation, should install dust cover around the bearing, and be coated with in the place of needs and to brush corrosion resistant coating, carry out anticorrosion and dustproof work.

Claims (1)

1. a mild steel core rubber pad steel spring combination vibration absorption and isolation support is characterized in that this bearing comprises upper junction plate (1), sandwich clad steel (2), rubber (3), mild steel bar (4), steel spring (5), lower connecting plate (6); Wherein, sandwich clad steel (2), rubber (3) order are separately arranged, mild steel bar (4) is passed sandwich clad steel (2), rubber (3) is formed mild steel core rubber pad, upper junction plate (1) is positioned at the top of this mild steel core rubber pad, lower connecting plate (6) is positioned at the bottom of this mild steel core rubber pad, upper junction plate (1) and lower connecting plate (6) respectively with the upper and lower surface secure bond of mild steel core rubber pad, steel spring (5) is positioned at the periphery of this mild steel core rubber pad; The adjacent wires of this steel spring (5) closely links to each other, middle no gap;
Described steel spring (5) in use is in the state of tightening always, to give full play to its cuff effect, improves mild steel core rubber pad supporting capacity and reset feature;
Described upper junction plate (1) is the polyfluortetraethylene plate sliding support.
CN 201110197052 2010-11-11 2011-07-06 Soft steel core rubber mat-steel spring combined seismic isolation supporting seat Expired - Fee Related CN102287007B (en)

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CN201010538865 2010-11-11
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TWI567277B (en) * 2014-12-16 2017-01-21 Chong-Shien Tsai Friction damping support pad
CN104831622A (en) * 2015-05-15 2015-08-12 东南大学 Scattered shape memory alloy seismic reduction and isolation rubber support with automatic reset function
CN104912202B (en) * 2015-07-06 2017-02-15 广州大学 Shock isolation support
CN106193752B (en) * 2016-09-06 2018-11-06 南京工业大学 One kind is combined to surrender metal damper stage by stage
CN107701647A (en) * 2017-11-07 2018-02-16 陈楚贵 A kind of automobile shock pedestal
CN108625654A (en) * 2018-06-26 2018-10-09 西北民族大学 A kind of external sliding friction type rubber support combined isolation device
CN109356023B (en) * 2018-11-08 2021-01-15 北京工业大学 Damping anti-falling beam support
CN110241937A (en) * 2019-06-20 2019-09-17 海南大学 A kind of Self-resetting lead shear damper
CN111254989A (en) * 2020-03-18 2020-06-09 南京工业大学 Spring core high damping rubber shock insulation support
CN112900467B (en) * 2020-12-31 2022-03-01 浙江大学 Shock attenuation is from shallow basis of toughness building that restores to throne

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