CN203795641U

CN203795641U - Friction seismic isolation system with oblique planes

Info

Publication number: CN203795641U
Application number: CN201420124564.1U
Authority: CN
Inventors: 熊伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-19
Filing date: 2014-03-19
Publication date: 2014-08-27
Anticipated expiration: 2024-03-19

Abstract

The utility model discloses a friction seismic isolation system with oblique planes. The friction seismic isolation system comprises a barrier, a conical sliding concave surface and a central column. The central column can move between the barrier and the conical sliding concave surface and comprises an upper flange, lower flanges and a conical sliding convex surface; an oblique angle of the conical sliding convex surface is fittingly in contact with a central oblique angle of the conical sliding concave surface; an enclosing wall perpendicularly extends out of the edge of the conical sliding concave surface; the upper end of the enclosing wall is in contact with the lower surfaces of the lower flange; the upper end surface of the barrier is embedded in a space among the upper flange and the lower flanges, and the lower end of the barrier is connected with the conical sliding concave surface. The friction seismic isolation system has the advantages that a structure can be easily reset under the condition of near-field high-pulse earthquake, the central column can be effectively prevented from being vertically separated from the friction seismic isolation system, accordingly, risks of toppling failure of the seismic isolation system can be reduced, damage hazards due to collision between the central column and the enclosing wall when horizontal displacement is excessively large can be prevented, and the friction seismic isolation system has wide popularization and application value in earthquake engineering, structural engineering and other civil engineering.

Description

A kind of bevel friction shock isolation system

Technical field

The utility model relates to the shock isolation system in a kind of earthquake engineering, Structural Engineering and other civil engineering, particularly relates to a kind of bevel friction shock isolation system.

Background technology

Isolation structure is by Seismic Isolation of Isolation Layer, earthquake motion to be isolated, thus a kind of passive energy dissipation form of structure of protection superstructure.Isolation structure is mainly by the basic cycle of extending structure, the seismic energy that enters superstructure to be reduced greatly, alleviates the earthquake response of structure, to reach the object of isolation earthquake.In shock-insulation building, the proportion of passive base isolation is larger.So-called base isolation refers to that the shock isolation system by horizontal flexibility is installed between superstructure and ground makes itself and ground decoupling zero.The more shock isolation system of R and D comprises following several shock isolating pedestal: lead core rubber support, friction slipper and roller bearing etc.Wherein frictional slip shock isolation system is because not having more superiority with specific period seismic wave resonance, and can meet different shock insulation needs by limiting friction power.

Common friction isolation system is friction sliding shock isolation system (the Friction Pendulum System being proposed by the Zayas of Univ California-Berkeley, FPS), FPS is made up of upper unit, central slider and bottom spherical concave surface three parts of sliding.When earthquake occurs, central slider can be slided in spherical concave surface, thus isolation seismic energy.On the basis of FPS, Constantinou has proposed again triple friction sliding shock isolation systems (Triple Friction Pendulum System, TFPS), TFPS comprises central slider and two pairs of slide planes, and little shake, middle shake and large shake are all had to different tuning adaptive capacitys.But due to the particularity of the sliding pedestal configurations that rubs in FPS and TFPS, on the one hand, in the comparatively difficulty of reset of large pulse Structures under Earthquake, shock isolating pedestal will produce certain residual displacement compared with its original state, becomes the obstacle in engineering application; On the other hand, because earthquake vertical reaction near field is excessive, violent seismic forces easily " is thrown " the recessed slide plane of the slide block in bearing and upper unit away disengaging, causes whole friction sliding support damage, thereby upper unit is in jeopardy.And, in place moving past when large, the central slider of FPS and TFPS may collide the leg of slip concave edge, makes shock isolating pedestal have the danger of destruction.On the FPS(shown in Fig. 1) and TFPS(under) destruction structural representation.

Utility model content

Technical problem to be solved in the utility model is, overcome the above-mentioned deficiency of prior art, a kind of bevel friction shock isolation system with Self-resetting function is provided, can effectively prevent the vertical disengaging of central post, reduce shock isolation system overturning, and the risk of central post and the horizontal impact wreckage of leg.

The technical scheme that the utility model solves its technical problem employing is: a kind of bevel friction shock isolation system, comprises baffle plate, conical slip concave surface and the central post that can move between baffle plate and conical slip concave surface; Described central post is made up of top flange, bottom flange and conical slip convex surface, and conical slip convex surface and central post are integrated into one; The angle of inclination of described conical slip convex surface coincide and contacts with the angle of inclination at conical slip concave surface center; The edge-perpendicular of described conical slip concave surface is extended a leg; The upper end of described leg contacts with the soffit of bottom flange; The upper surface of described baffle plate is intercalated between top flange and bottom flange, and the lower end of baffle plate is connected with conical slip concave surface.The effect of baffle plate is to increase shock isolation system vertically to retrain, the vertical disengaging that earthquake vertical component is large, structure can effectively prevent central post when comparatively towering.

Further, described central post is divided into two-layer by top flange and bottom flange, and the central cross-section of central post is " doing " font and arranges.

Further, the inwall of described leg is coated with rubber cover, forms the boundary protection of leg, and under large shake, when horizontal movement is excessive, if central post and the collision of leg inwall, rubber border can absorb collision energy.

Further, described conical slip concave surface and leg are combined into the column structure that bottom surface is taper surface, make the horizontal movement allowed band of central post large, and in taper shape slip concave surface, skid off while avoiding central post to move.

The bevel friction shock isolation system that the utility model provides, before earthquake, the taper shape slip convex surface of central post is positioned at the core of conical slip concave surface, and conical slip convex surface contacts entirely with conical slip concave surface, and initial stiction is provided; In the time of earthquake, bevel friction shock isolation system by carrier (as house etc.) upper load Transmit evenly to substructure, less frictional force between the movement at the taper shape slip convex surface stray circle cone sliding concave surface center by central post and conical slip convex surface and conical slip concave surface, adapts to superstructure because of seismic movement.The taper shape slip convex surface of central post and conical slip concave surface form Self-resetting system, in the time of big or middle earthquake, conical slip convex surface from taper shape slip concave surface center more away from, it contacts less with conical slip concave surface, frictional force is less, is easy to reset.

Because being " doing " font, arranges the central cross-section of central post, and be combined into one with taper shape slip convex surface, in the time that lifting from appears in excessive, the conical slip convex surface of the vertical vibrations of near field earthquake, can reduce conical slip convex surface and depart from the phenomenon throwing away, efficiently solve conventional sliders and depart from upper grooves, cause the problem of shock isolation system overturning.

In addition, conical slip concave surface has been become the conical concave surface at certain inclination angle by the iso-curvature concave surface of traditional F PS, and conical concave surface is easy to construction manufacture with respect to spherical concave surface, and lower raft can directly be built rear upper coating stainless steel plate with high-strength concrete, cost-saving; Conical concave surface angle is constant, is easier to carry out quantitative study compared with traditional F PS.

The beneficial effect that the utility model compared with prior art has: the risk that 1) can effectively reduce shock isolation system overturning; 2) can effectively prevent the vertical disengaging of central post; 3) base plate of conical slip concave surface is easy to construction manufacture; 4) band Self-resetting system; 5) leg inwall is provided with rubber border, can absorb collision energy, and due to shock isolation system enclose inside, rubber is difficult for aging; 6) shock isolation system long service life, the military service phase that can covered structure.

Brief description of the drawings

Fig. 1 is on traditional FPS() and TFPS(under) destruction structural representation;

Fig. 2 is the stereochemical structure central cross-section schematic diagram that the taper shape slip convex surface of the utility model embodiment is positioned at conical slip concave surface center;

Fig. 3 is plane structure schematic diagram embodiment illustrated in fig. 2;

Fig. 4 is that the taper shape slip convex surface of the utility model embodiment is away from the stereochemical structure central cross-section schematic diagram at taper shape slip concave surface center;

Fig. 5 is plane structure schematic diagram embodiment illustrated in fig. 4.

Detailed description of the invention

Below in conjunction with drawings and Examples, the utility model is described in further detail.

See figures.1.and.2, the bevel friction shock isolation system that the present embodiment provides, comprises baffle plate 1, conical slip concave surface 2 and the central post 3 that can move between baffle plate 1 and conical slip concave surface 2.

Central post 3 is made up of top flange 31, bottom flange 32 and conical slip convex surface 33.Central post 3 is divided into two-layer by top flange 31 and bottom flange 32, its central cross-section is " doing " font and arranges, and be combined into one with taper shape slip convex surface 33, in the time that lifting from appears in excessive, the conical slip convex surface 33 of the vertical vibrations of near field earthquake, can reduce conical slip convex surface 33 and depart from the phenomenon throwing away, efficiently solve conventional sliders and depart from upper grooves, the problem that causes whole shock isolation system to destroy.

Conical slip concave surface 2 and conical slip convex surface 33 are all coniform, and the angle of inclination of conical slip convex surface 33 coincide and contacts with the angle of inclination at conical slip concave surface 2 centers.The taper shape concave surface 2 that slides is replaced to the coniform slope concave surface with certain inclination angle by the iso-curvature concave surface of traditional F PS, because coniform slope concave surface is easy to construction manufacture, lower raft can directly be built rear upper coating stainless steel plate with high-strength concrete, cost-saving; And coniform slope concave curvature is constant, be easier to carry out quantitative study compared with traditional F PS.

The edge-perpendicular of conical slip concave surface 2 is extended a leg 21, and the upper end of leg 21 contacts with the soffit of bottom flange 31; Conical slip concave surface 2 is combined into leg 21 column structure that bottom surface is taper surface, makes the horizontal movement allowed band of central post 3 large, and in taper shape slip concave surface 2, skids off while avoiding central post 3 to move; The inwall of leg 21 is coated with rubber cover, forms the boundary protection of leg 21, and under large shake, when horizontal movement is excessive, if central post 3 and leg 21 inwall collisions, rubber border can absorb collision energy; Due to the inner good leak tightness of leg 21, rubber is difficult for aging; Even aging, be also easy to change.

It is middle with bottom flange 32 that the upper surface of baffle plate 1 is intercalated in top flange 31, and the lower end of baffle plate 1 is connected with taper shape slip concave surface 2.Because the upper surface of baffle plate 1 is intercalated between top flange 31 and bottom flange 32, thereby increase the vertical constraint of shock isolation system, when earthquake vertical component is large, structure is when comparatively towering, can effectively prevent the vertical disengaging of central post 3.

Taper shape slip convex surface 33 and the conical slip concave surface 2 of central post 3 form Self-resetting system, before earthquake, conical slip convex surface 33 is positioned at the core of conical slip concave surface 2, and conical slip convex surface 33 is contacted entirely with conical slip concave surface 2, and initial stiction is provided; In the time of earthquake, conical slip convex surface 33 from taper shape slip concave surface 2 centers more away from, it contacts less with conical slip concave surface 2, frictional force is less; Especially when large shake, if conical slip convex surface 33 is positioned at from taper shape slip concave surface 2 center distal-most end, now conical slip convex surface 33 reaches minimum with contacting of conical slip concave surface 2, and frictional force is also minimum value, is easy to reset.During along with taper shape slip convex surface 33 stray circle cone sliding concave surface 2 center, 32 two ends, bottom flange of central post 3 have at least one end to be retrained by baffle plate, thereby effectively prevent the vertical disengaging of central post 3.

In a word, the present embodiment is simple in structure, efficiently solve conventional sliders and depart from upper grooves, cause shock isolation system overturning, slide block and leg impact wreckage problem when under large pulse earthquake, reset difficulty, the horizontal movement of structure are excessive, vertical bearing capacity is strong, good endurance, isolating affection are obvious, in earthquake engineering, Structural Engineering and other civil engineering, has application value widely.

Claims

1. a bevel friction shock isolation system, is characterized in that, comprises baffle plate, conical slip concave surface and the central post that can move between baffle plate and conical slip concave surface; Described central post is made up of top flange, bottom flange and conical slip convex surface, and conical slip convex surface and central post are integrated into one; The angle of inclination of described conical slip convex surface coincide and contacts with the angle of inclination at conical slip concave surface center; The edge-perpendicular of described conical slip concave surface is extended a leg; The upper end of described leg contacts with the soffit of bottom flange; The upper surface of described baffle plate is intercalated between top flange and bottom flange, and the lower end of baffle plate is connected with conical slip concave surface.

2. bevel friction shock isolation system as claimed in claim 1, is characterized in that, described central post is divided into two-layer by top flange and bottom flange, and the central cross-section of central post is " doing " font and arranges.

3. bevel friction shock isolation system as claimed in claim 1 or 2, is characterized in that, the inwall of described leg is coated with rubber cover.

4. bevel friction shock isolation system as claimed in claim 1 or 2, is characterized in that, described conical slip concave surface and leg are combined into the column structure that bottom surface is taper surface.

5. bevel friction shock isolation system as claimed in claim 3, is characterized in that, described conical slip concave surface and leg are combined into the column structure that bottom surface is taper surface.