CN214573304U - Friction pendulum seismic mitigation and isolation support with response type deflection limitation - Google Patents
Friction pendulum seismic mitigation and isolation support with response type deflection limitation Download PDFInfo
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- CN214573304U CN214573304U CN202120555661.6U CN202120555661U CN214573304U CN 214573304 U CN214573304 U CN 214573304U CN 202120555661 U CN202120555661 U CN 202120555661U CN 214573304 U CN214573304 U CN 214573304U
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Abstract
The utility model belongs to the technical field of the bridge beam supports, specific saying relates to a shock insulation support is subtracted to friction pendulum that response type shifted restriction. The structure of the device comprises an upper support plate, a middle support plate and a lower support plate; wherein, constitute the friction pendulum through the sphere welt between upper bracket board and the well bedplate, it is vice to have plane friction between well bedplate and the lower bolster, and the outside suit of friction pendulum restricts keeps off the ring, and restriction keeps off the ring and passes through the shear force bolt and install on upper bracket board or lower bedplate, forms the annular cavity gap that wraps around plane friction pair between lower bolster and the well bedplate, and restriction keeps off the bottom of ring and has the coining boss, and the coining boss just corresponds perpendicularly with annular cavity gap matching. This novel subtract isolation bearing distinguishes the restriction through to horizontal slip and friction pendulum displacement, and the friction pendulum is limited under the normal operating mode, and the horizontal friction is vice limited after the response earthquake, ensures that the friction pendulum works alone, does not receive the horizontal displacement influence to have structural configuration reasonable, subtract the isolation effect excellent, safety and stability, long service life's characteristics.
Description
Technical Field
The utility model belongs to the technical field of the bridge beam supports, specific saying relates to a shock insulation support is subtracted to friction pendulum that response type shifted restriction.
Background
The bridge support is a connection point of a lower structure on a bridge, can smoothly and safely transfer load borne by an upper beam body to a lower pier, and meanwhile guarantees that the end part of the bridge span mechanism realizes horizontal displacement, a corner and deformation under the action of factors such as load bearing load, temperature change, external force impact and concrete shrinkage, and the vibration borne by the pier is reduced.
According to safety regulations, highway and railway bridges in an area with an earthquake of more than eight degrees need to have seismic isolation and reduction functions. At present, the common seismic mitigation and isolation support has rubber seismic mitigation and isolation supports, steel damping seismic mitigation and isolation supports and friction pendulum seismic mitigation and isolation supports, and the friction pendulum seismic mitigation and isolation supports are widely used by various engineering units by virtue of superior performances such as light weight, clear seismic mitigation and isolation mechanism, aging resistance and fire resistance.
The common friction pendulum shock insulation support adopts an integrated design of shock insulation displacement reduction and vibration insulation displacement and beam temperature variation displacement, so that the horizontal sliding friction resistance of the support generated by beam temperature variation is increased, after the friction pendulum and a horizontal friction pair simultaneously move under stress, the height of the beam body rises and falls, the stress balance of the internal structure of the beam body is influenced, meanwhile, the daily horizontal displacement and the friction pendulum shock insulation have two different functions of shock insulation reduction and insulation, and the friction pendulum works under the influence of horizontal sliding movement after responding to an earthquake, so that the shock insulation reduction effect is reduced, and great design defects and potential safety hazards exist; or the vibration reduction and isolation displacement during earthquake and the temperature change displacement under non-earthquake are both realized by the friction pendulum structure, the two are combined into one, in the non-earthquake state, the deflection of the beam body caused by factors such as temperature can drive the support plate to slide, and due to the double-spherical form of the friction pendulum, the beam body can fluctuate and receive strong horizontal component force, so that the structural stress imbalance, the bridge deck bump and the beam body dislocation are caused in serious conditions, the driving is difficult, the horizontal component force can also increase the sliding resistance of the support, the abrasion of the sliding plate is increased, the service life of the support is influenced, and the use effect is particularly undesirable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can distinguish the restriction to horizontal slip and friction pendulum displacement, the friction pendulum is limited under the normal operating mode, and the horizontal friction is vice limited after the response earthquake, ensures that the friction pendulum works alone, does not receive the novel isolation bearing that subtracts of horizontal displacement influence.
In order to achieve the above object, the utility model adopts the following technical scheme:
a friction pendulum vibration reduction and isolation support with response type deflection limitation comprises an upper support plate, a middle support plate and a lower support plate; wherein, constitute friction pendulum through the spherical liner plate between upper bracket board and the well bedplate, it is vice to have plane friction between well bedplate and the lower support board, its characterized in that: the friction pendulum is externally sleeved with a limiting baffle ring, the limiting baffle ring is installed on the upper support plate or the lower support plate through a shear bolt, a ring-shaped cavity gap surrounding the plane friction pair is formed between the lower support plate and the middle support plate, an embedded pressing boss is arranged at the bottom of the limiting baffle ring, and the embedded pressing boss is matched with the ring-shaped cavity gap and vertically corresponds to the annular cavity gap.
The additional technical characteristics of the friction pendulum seismic mitigation and isolation bearing with the response type displacement limitation further comprise that:
the outer edge of the limit stop ring is fixed at the bottom of the upper support plate through the shear bolt, and the press boss is located at the inner edge of the limit stop ring; the lower support plate is in a basin shape, the middle support plate is positioned in the lower support plate, and the annular cavity is positioned on the circumferential side part of the lower support plate and the middle support plate;
the top surface and the bottom surface of the spherical lining plate are both convex spherical surfaces, and the bottom surface of the upper support plate and the top surface of the middle support plate are both concave spherical surfaces;
an upper friction pair is formed between the upper support plate and the spherical lining plate through a first spherical sliding plate, a lower friction pair is formed between the middle support plate and the spherical lining plate through a second spherical sliding plate, and the plane friction pair comprises a plane sliding plate arranged between the middle support plate and the lower support plate;
the planar friction pair has a linear guide mechanism, which comprises guide grooves and guide strips arranged between the middle support plate and the lower support plate;
the guide groove is formed in the top surface of the lower support plate, and the guide bar is mounted on the bottom surface of the middle support plate through a connecting bolt;
the cross section of the guide strip is in an inverted convex shape, the upper wide head of the guide strip is arranged in the positioning groove in the bottom surface of the middle support plate, the bottom surface of the lower narrow head of the guide strip is provided with a counter bore for mounting the connecting bolt, and two side surfaces of the lower narrow head of the guide strip and the side wall of the guide groove of the lower support plate form a guide friction pair through a horizontal sliding strip.
The utility model provides a friction pendulum subtracts isolation bearing of response type restriction that shifts compares with prior art, has following advantage: firstly, the novel seismic mitigation and isolation support is characterized in that a friction pendulum formed by an upper support plate, a spherical lining plate and a middle support plate is separated and limited from a plane friction pair between the middle support plate and a lower support plate by adopting a limiting baffle ring, the limiting baffle ring is used for limiting the friction pendulum independently under a normal working condition and limiting the plane friction pair independently after receiving an earthquake response, so that the two functions are mutually independent, the interference is avoided, the overall structure is compact, the layout is reasonable, the temperature variation displacement and seismic mitigation and isolation displacement effects are excellent, the support can run safely and stably under the normal working condition and after responding to the earthquake, the economic benefit is good, and the seismic mitigation and isolation support has market popularization value; and secondly, the limiting baffle ring is arranged on the upper support plate or the lower support plate through the shear bolt, an annular cavity gap surrounding the plane friction pair is formed between the lower support plate and the middle support plate, the bottom of the limiting baffle ring is provided with an embedding boss, the embedding boss is matched with the annular cavity gap and vertically corresponds to the annular cavity gap, namely, the shear bolt is sensitive to earthquake response, the limiting baffle ring is flexible in displacement action, the mutual switching between the friction pendulum and the plane friction pair can be rapidly completed, and meanwhile, the displacement limiting structure is impact-resistant and wear-resistant, convenient to process and manufacture, low in production cost and long in service life.
Drawings
FIG. 1 is a schematic structural view of a friction pendulum seismic isolation bearing with response type displacement limitation (normal working condition- -limited friction pendulum);
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic structural diagram of the novel friction pendulum seismic isolation bearing after deflection limitation (response earthquake- -plane friction pair limitation).
Detailed Description
The structure and the working principle of the friction pendulum seismic isolation and reduction support with response type deflection limitation provided by the invention are further described in detail with reference to the accompanying drawings.
Referring to fig. 1-3, the structure of the friction pendulum seismic isolation bearing with response type displacement limitation provided by the present invention is schematically illustrated. The structure of the novel seismic isolation and reduction support comprises an upper support plate 1, a middle support plate 2 and a lower support plate 3; wherein, constitute the friction pendulum through spherical lining board 4 between upper bracket board 1 and the well bedplate 2, it is vice to have plane friction between well bedplate 2 and the lower support plate 3, the outside suit restriction of friction pendulum keeps off ring 5, restriction keeps off ring 5 and installs on upper bracket board 1 or lower support plate 3 through shear force bolt 61, form between lower support plate 3 and the well bedplate 2 and wrap up the vice annular cavity gap 7 of plane friction, restriction keeps off the bottom of ring 5 and has the coining boss 51, the coining boss 51 matches and corresponds perpendicularly with annular cavity gap 7.
The working principle is as follows: the novel friction pendulum vibration reduction and isolation support is characterized in that a limiting baffle ring 5 is sleeved outside a friction pendulum of the novel friction pendulum vibration reduction and isolation support, the limiting baffle ring 5 is installed on an upper support plate 1 or a lower support plate 3 through a shear bolt 61, so that vibration reduction and isolation displacement and temperature variation displacement are separately realized, as shown in figures 1 and 2, under a non-earthquake state (normal working condition), a plane sliding friction pair plays a role, and large resistance and beam body fluctuation cannot be generated; as shown in figure 3, when an earthquake occurs, the shear bolt 61 is broken, the limit baffle ring 5 falls due to the action of gravity, the embedding boss 51 clamps between the lower support plate 3 and the middle support plate 2 and enters the annular cavity 7 surrounding the plane friction pair, so that the plane friction pair fails, and the shock absorption and isolation function is realized, the purposes of shock absorption and isolation and reduction of the self-vibration period of the structure are realized, and the shock absorption and isolation effect of the friction pendulum is really realized.
In the structure of the response type displacement limiting seismic isolation bearing,
optionally, the outer edge of the limit stop ring 5 is fixed at the bottom of the upper support plate 1 through a shear bolt 61, and the press-fitting boss 51 is located at the inner edge of the limit stop ring 5; correspondingly, the lower support plate 3 is in a basin shape, the middle support plate 2 is positioned in the lower support plate 3, the annular cavity 7 is positioned between the basin wall 31 of the lower support plate 3 and the peripheral side part of the middle support plate 2, namely the shear bolt 61 is broken in response to an earthquake, the limiting baffle ring 5 falls, the embedded boss 51 is clamped in the annular cavity 7 to finish the turning limiting action, the turning limiting structure formed by the limiting baffle ring and the annular cavity 7 is simple, the turning action is sensitive, the limiting conversion of the friction pendulum and the plane friction pair is flexible, the sudden conditions such as the earthquake can be quickly responded, and the safety and stability of the bridge are improved;
particularly, the top surface and the bottom surface of the spherical lining plate 4 are both convex spherical surfaces, the bottom surface of the upper support plate 1 and the top surface of the middle support plate 2 are both concave spherical surfaces, so that a friction pendulum with a complete structure is formed, after the double-spherical friction displacement plays a role, the shock absorption and isolation functions are realized, in the reciprocating sliding process, the seismic capacity is converted into the potential energy and the friction heat energy for lifting the beam body, the self-vibration period of the structure is prolonged, and the shock absorption and isolation effects are remarkable;
furthermore, an upper friction pair is formed between the upper support plate 1 and the spherical lining plate 4 through a first spherical sliding plate 81, a lower friction pair is formed between the middle support plate 2 and the spherical lining plate 4 through a second spherical sliding plate 82, the plane friction pair comprises a plane sliding plate 83 arranged between the middle support plate 2 and the lower support plate 3, the spherical sliding plates (81 and 82) and the plane sliding plate 83 are preferably made of stainless steel, the surface is smooth, the motion effect is good, the wear resistance is realized, the high-pressure condition is particularly suitable, and the working period is long;
as a preferred embodiment, the planar friction pair has a linear guide mechanism, which includes a guide groove 92 and a guide strip 91 arranged between the middle support plate 2 and the lower support plate 3, and a tenon structure is formed by the protrusion of the guide strip 91 and the guide groove 92, so that the seismic mitigation and isolation support can only generate unidirectional horizontal displacement, which can reinforce the connection structure of the middle support plate 2 and the lower support plate 3, enhance the overall tightness of the seismic mitigation and isolation support, and normalize the motion of the horizontal friction pair, thereby preventing the excessive slip amplitude or direction scattering, which causes the internal collapse of the support structure and the excessive wear of parts;
furthermore, the guide groove 92 is arranged on the top surface of the lower support plate 3, and the guide strip 91 is installed on the bottom surface of the middle support plate 2 through the connecting bolt 82, preferably, the guide groove 92 and the guide strip 91 are arranged on the center line of the plane friction pair, so that the limiting and guiding functions are both considered, the stress balance is ensured, and the movement is smooth; correspondingly, the plane sliding plate 83 arranged in the plane friction pair is composed of two symmetrical center lines and can be fixed in a preset groove body;
optionally, the cross section of the guide strip 91 is in an inverted convex shape, the upper wide head of the guide strip 91 is arranged in the positioning groove in the bottom surface of the middle support plate 2, the stability of the guide strip 91 is improved, the guide strip is clamped in the positioning groove, the positioning is firmer, the counter bore for installing the connecting bolt 82 is formed in the bottom surface of the lower narrow head of the guide strip 91, two side surfaces of the lower narrow head of the guide strip 91 and the side wall of the guide groove 92 of the lower support plate 3 form a guide friction pair through the horizontal sliding strip 84, the motion damping is reduced, the smoothness of horizontal sliding is improved, the linear guide is ensured to be rapid and accurate, preferably, the lower part of the plane sliding plate of the plane friction pair can be additionally provided with a layer of stainless steel sliding plates 85 (symmetrically arranged along the guide groove 92), and the inner edges of the stainless steel sliding plates 85 are buckled downwards and overlapped with the horizontal sliding strip 83, so as to improve the overall sliding effect.
Claims (7)
1. A friction pendulum vibration reduction and isolation support with response type deflection limitation comprises an upper support plate, a middle support plate and a lower support plate; wherein, constitute friction pendulum through the spherical liner plate between upper bracket board and the well bedplate, it is vice to have plane friction between well bedplate and the lower support board, its characterized in that: the friction pendulum is externally sleeved with a limiting baffle ring, the limiting baffle ring is installed on the upper support plate or the lower support plate through a shear bolt, a ring-shaped cavity gap surrounding the plane friction pair is formed between the lower support plate and the middle support plate, an embedded pressing boss is arranged at the bottom of the limiting baffle ring, and the embedded pressing boss is matched with the ring-shaped cavity gap and vertically corresponds to the annular cavity gap.
2. The friction pendulum seismic mitigation and isolation bearing with the response type deflection limitation as claimed in claim 1, wherein: the outer edge of the limiting baffle ring is fixed at the bottom of the upper support plate through the shear bolt, and the embedding boss is positioned at the inner edge of the limiting baffle ring; the lower support plate is basin-shaped, the middle support plate is positioned in the lower support plate, and the annular cavity is positioned at the circumferential side part of the lower support plate and the middle support plate.
3. The friction pendulum seismic mitigation and isolation bearing with the response type deflection limitation as claimed in claim 1 or 2, wherein: the top surface and the bottom surface of sphere welt are convex spherical, the bottom surface of upper bracket board and the top surface of well bedplate are concave spherical.
4. The friction pendulum seismic mitigation and isolation bearing with the response type deflection limitation as claimed in claim 3, wherein: constitute through first spherical slide between upper bracket board and the spherical lining board and go up the friction pair, constitute the friction pair down through second spherical slide between well bedplate and the spherical lining board, the plane friction is vice including setting up the plane slide between well bedplate and the lower bolster board.
5. The friction pendulum seismic mitigation and isolation bearing with the response type deflection limitation as claimed in claim 1, wherein: the plane friction pair is provided with a linear guide mechanism which comprises a guide groove and a guide strip arranged between the middle support plate and the lower support plate.
6. The friction pendulum seismic mitigation and isolation bearing with the response type deflection limitation as claimed in claim 5, wherein: the guide way set up in the top surface of bottom suspension bedplate, the gib block passes through connecting bolt to be installed the bottom surface of well suspension bedplate.
7. The friction pendulum seismic mitigation and isolation bearing with the response type deflection limitation as claimed in claim 6, wherein: the cross section of the guide strip is in an inverted convex shape, the upper wide head of the guide strip is arranged in the positioning groove in the bottom surface of the middle support plate, the bottom surface of the lower narrow head of the guide strip is provided with a counter bore for mounting the connecting bolt, and two side surfaces of the lower narrow head of the guide strip and the side wall of the guide groove of the lower support plate form a guide friction pair through a horizontal sliding strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120555661.6U CN214573304U (en) | 2021-03-18 | 2021-03-18 | Friction pendulum seismic mitigation and isolation support with response type deflection limitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120555661.6U CN214573304U (en) | 2021-03-18 | 2021-03-18 | Friction pendulum seismic mitigation and isolation support with response type deflection limitation |
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| Publication Number | Publication Date |
|---|---|
| CN214573304U true CN214573304U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120555661.6U Active CN214573304U (en) | 2021-03-18 | 2021-03-18 | Friction pendulum seismic mitigation and isolation support with response type deflection limitation |
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| Country | Link |
|---|---|
| CN (1) | CN214573304U (en) |
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2021
- 2021-03-18 CN CN202120555661.6U patent/CN214573304U/en active Active
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