CN114319625B - Shock insulation device for resisting rare earthquakes and building shock insulation method - Google Patents
Shock insulation device for resisting rare earthquakes and building shock insulation method Download PDFInfo
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Abstract
The invention relates to the technical field of anti-seismic equipment, and provides a seismic isolation device and a building seismic isolation method for resisting rare earthquakes, wherein the seismic isolation device for resisting rare earthquakes comprises a sliding component and a seismic isolation support, and the sliding component comprises a substrate and a sliding panel; the shock insulation support comprises a support main body and a lower connecting plate arranged at the bottom of the support main body, wherein the lower connecting plate is arranged on the sliding panel and synchronously slides with the sliding panel. When rare earthquakes occur, the horizontal shearing force born by the support body of the shock insulation support is larger than the friction force between the sliding panel and the top of the substrate, the shock insulation support is connected with the sliding panel through the lower connecting plate and slides on the substrate, so that the horizontal shearing deformation of the shock insulation support can be limited to avoid shearing damage, the magnitude of the earthquake force transmitted to the upper structure by the shock insulation device for resisting the rare earthquakes is limited, and the shock insulation device for resisting the rare earthquakes still has higher earthquake energy dissipation capacity.
Description
Technical Field
The invention relates to the technical field of anti-seismic equipment, in particular to a seismic isolation device and a building seismic isolation method for resisting rare earthquakes.
Background
For the basic shock insulation structure, a lead rubber shock insulation support (Lead Rubber Bearings, LRB for short) system is the most widely used basic shock insulation system at home and abroad at present. The inventor preliminarily discusses the earthquake response characteristics under the action of rare earthquakes on a basic earthquake isolation structure (hereinafter referred to as an LRB basic earthquake isolation structure) adopting an LRB earthquake isolation system, and researches show that: 1) The basic shock insulation structure has the unsafe property that the damage of the upper structure is greatly increased relative to the traditional substrate fixing structure when the basic shock insulation structure is subjected to the action of ultra-large earthquakes (rare earthquakes); 2) Although the design concept of reducing the earthquake-proof intensity of the upper structure according to the existing GB50011-2010 building earthquake-proof design specification does not basically affect the earthquake-proof performance of the LRB foundation earthquake-proof structure under the actions of fortification and rare earthquakes, the design mode of reducing the earthquake-proof intensity is not preferable for the upper structure under the action of rare earthquakes; 3) How to ensure good anti-seismic performance of a base shock insulation structure under the effects of fortification and rare earthquakes and safety performance under the effects of rare earthquakes is a challenging problem.
The LRB foundation vibration isolation structure has the phenomenon that the damage of the upper structure is increased sharply when the earthquake is very rare, and the reason of the phenomenon can be explained from the compression shear experimental curves of the lead rubber vibration isolation support under different shear strain loads. Figure 1 shows hysteresis curves of a lead rubber shock insulation support (LRB 300 shock insulation support for short) with the diameter of 300mm under the action of constant vertical compressive stress and different shear strain loads. The total thickness of the rubber layer of the LRB300 shock insulation support is 59.0mm; the vertical compressive stress is 10.0MPa; the horizontal loading frequency and the waveform are respectively 0.25Hz and sine wave; the horizontal loading shear strain was 100%, 150%, 200%, 250%, 300%, 350% and 400% in this order (horizontal loading shear strain is the ratio of horizontal maximum loading displacement to total rubber layer thickness). As can be seen from fig. 1: along with the increase of the horizontal loading shear strain, the hardening phenomenon of the LRB300 shock insulation support is more obvious, and the maximum shear force of the corresponding support is also increased; in addition, according to GB/T20688.1-2007 rubber support part 1: the test method of the shock-insulating rubber support determines that the corresponding horizontal equivalent damping ratio is greatly reduced under the condition of increasing horizontal loading shear strain of the LRB300 shock-insulating support (24.2%, 20.4%, 18.5%, 16.0%, 14.5%, 13.7% and 12.8% in sequence). Therefore, on one hand, under the earthquake action of continuously increasing strength, the earthquake force transmitted to the upper structure is also continuously increased along with the increase of the maximum horizontal shear strain of the earthquake isolation support; on the other hand, the seismic energy dissipation capacity of LRB seismic isolation mounts is instead reduced due to the increasing horizontal shear strain of the seismic isolation mounts. This is one of the reasons that LRB foundation seismic isolation structures are poor in seismic performance under the rare seismic action. In addition, the rubber vibration isolation support is used as a key component of the whole foundation vibration isolation structure, and under the action of rare earthquakes, the horizontal shearing deformation of the rubber vibration isolation support possibly exceeds the horizontal deformation capacity of the rubber vibration isolation support, so that the foundation vibration isolation structure is damaged.
Disclosure of Invention
The invention aims to provide a seismic isolation device for resisting rare earthquakes, and aims to solve the problem that the conventional seismic isolation support cannot meet the seismic isolation requirement under the rare earthquakes.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a seismic isolation apparatus for resisting rare earthquakes, for use in seismic isolation in rare earthquakes, comprising a sliding member and a seismic isolation support, the sliding member comprising a base and a sliding panel disposed on top of the base, the sliding panel being adapted to slide on a top surface of the base against frictional forces; the shock insulation support is used for deforming energy consumption to realize shock absorption, and the shock insulation support comprises a support main body and a lower connecting plate arranged at the bottom of the support main body, wherein the lower connecting plate is arranged on the sliding panel and slides synchronously with the sliding panel.
The invention has the beneficial effects that: according to the earthquake isolation device for resisting rare earthquakes, the sliding component is combined with the earthquake isolation support, the lower connecting plate of the earthquake isolation support is connected with the sliding panel of the sliding component, when rare earthquakes occur, the horizontal shearing force born by the support main body of the earthquake isolation support is larger than the friction force between the sliding panel and the top of the substrate, the support main body is connected to the sliding panel through the lower connecting plate and slides on the substrate, so that the horizontal shearing deformation of the support main body can be limited to avoid shearing damage, the magnitude of the earthquake force transmitted to the upper structure by the earthquake isolation device for resisting rare earthquakes is limited, and meanwhile, the earthquake isolation device for resisting the rare earthquakes still has higher earthquake energy dissipation capacity; meanwhile, in rare earthquakes, the horizontal shearing force born by the shock insulation support is smaller than the friction force between the sliding panel and the top of the substrate, and the shock insulation support cannot slide, so that the good shock resistance of the shock insulation support under fortification and rare earthquakes is inherited, and the requirement of multi-level shock resistance fortification is met.
In one embodiment, the base top is formed with a friction end forming a friction surface towards one end side of a sliding panel provided on the friction surface for sliding against the friction force on the friction surface.
By adopting the technical scheme, the sliding panel is supported by the friction end part of the substrate, and is placed on the friction surface of the friction end part for generating friction force.
In one embodiment, the sliding component is a sliding shock mount.
By adopting the technical scheme, the sliding component adopts the sliding shock insulation support to ensure the shock resistance under rare earthquakes.
In one embodiment, the slip panel is a polytetrafluoroethylene panel.
By adopting the technical scheme, the slippage panel is made of polytetrafluoroethylene panel, so that the friction force between the slippage panel and the friction end part is improved.
In one embodiment, the shock mount is a lead rubber shock mount.
By adopting the technical scheme, the lead rubber shock insulation support is selected as the shock insulation support, and the integral shock resistance of the shock insulation device for resisting very rare earthquakes is improved by utilizing the good shock insulation effect of the lead rubber shock insulation support.
In one embodiment, the coefficient of friction f between the slip panel and the top surface of the substrate SL Is that
Wherein q D In order to resist Qu Chongbi of the seismic isolation device which is very rare in earthquake, G is the rubber shear modulus of the lead rubber seismic isolation support, sigma is the vertical compressive stress of the lead rubber seismic isolation support, and u SL To resist the sliding displacement of the shock insulation device of very rare earthquakes, T R The thickness of the rubber layer of the lead core rubber shock insulation support is equal to that of the rubber layer of the lead core rubber shock insulation support.
By adopting the technical scheme, the friction coefficient can be determined according to the expected slip displacement according to the formula of the friction coefficient.
In one embodiment, the shock mount is a rubber shock mount.
By adopting the technical scheme, the rubber damping support is selected as the shock insulation support, and the shock insulation performance of rubber materials is utilized to improve the overall shock resistance.
In a second aspect, the present invention provides a method of building insulation using an apparatus for insulation against very rare earthquakes as described above, the method comprising:
the method comprises the steps of assembling a seismic isolation device for resisting rare earthquakes, and arranging a seismic isolation support on a sliding component so that a lower connecting plate of the seismic isolation support is connected with a sliding panel of the sliding component;
the base of the sliding component is used for being connected with the foundation, and the support body of the shock insulation support is used for being connected with the building.
The invention has the beneficial effects that: according to the building vibration isolation method provided by the invention, on the basis of utilizing the vibration isolation device for resisting rare earthquakes to conduct vibration isolation, the vibration isolation building is ensured to have good vibration resistance under the rare earthquakes, and the requirement of multistage vibration resistance fortification is met.
In one embodiment, the method further comprises: the friction coefficient between the sliding panel and the top surface of the substrate is adjusted so that the sliding panel slides in rare earthquakes.
By adopting the technical scheme, the friction coefficient between the sliding panel and the top surface of the substrate is adjusted, so that the shearing force received by the lead rubber shock insulation support is larger than the friction force under rare earthquakes, and the lead rubber shock insulation support can slide on the friction surface, so that the shock insulation device resisting the rare earthquakes still has good shock resistance under the rare earthquakes.
In one embodiment, in the step of adjusting the coefficient of friction between the slip panel and the top surface of the substrate: the sliding displacement is set to be the same as the maximum horizontal shear deformation of the shock insulation device resisting the rare earthquakes.
By adopting the technical scheme, the sliding displacement is set to be the same as the maximum horizontal shear deformation of the shock insulation device resisting the rare earthquakes under the action of the rare earthquakes, so that the shock resistance of the shock insulation device resisting the rare earthquakes is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a hysteresis performance curve of a conventional 300mm diameter lead rubber shock mount under different horizontal shear strains;
FIG. 2 is a three-wire restoring force model of a seismic isolation apparatus resistant to very rare earthquakes provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a seismic isolation apparatus for resisting rare earthquakes according to an embodiment of the present invention.
Wherein, each reference sign in the figure:
100. shock insulation means resistant to very rare earthquakes; 10. a sliding member; 11. a substrate; 12. a slip panel; 13. a friction end; 131. a friction surface; 20. a shock insulation support; 21. a holder body; 22. and a lower connecting plate.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The lead core rubber vibration isolation support system is the most widely used base vibration isolation system at home and abroad at present, and has excellent vibration isolation performance under rare base. However, in rare earthquakes, the damage of the upper structure of the lead rubber vibration isolation support is increased sharply, so that on one hand, the earthquake force transmitted to the upper structure is increased continuously along with the increase of the maximum horizontal shear strain of the vibration isolation support under the earthquake action of continuously increasing strength of the base vibration isolation structure of the lead rubber vibration isolation support; on the other hand, the seismic energy dissipation capacity of the lead rubber shock insulation support is reduced due to the increasing horizontal shear strain of the shock insulation support. The lead rubber shock insulation support is one of reasons for poor shock resistance under the action of rare earthquakes. In addition, the rubber vibration isolation support is used as a key component of the whole foundation vibration isolation structure, and under the action of rare earthquakes, the horizontal shearing deformation of the rubber vibration isolation support possibly exceeds the horizontal deformation capacity of the rubber vibration isolation support, so that the foundation vibration isolation structure is damaged.
Therefore, the invention provides the earthquake isolation device for resisting the rare earthquakes and the building earthquake isolation method, the earthquake isolation device for resisting the rare earthquakes is formed by connecting the lead rubber earthquake isolation support and the sliding earthquake isolation support in series, the lead rubber earthquake isolation support is arranged on the sliding panel of the sliding earthquake isolation support, when the rare earthquakes occur, the shearing force born by the lead rubber earthquake isolation support exceeds the friction force between the sliding panel of the sliding earthquake isolation support and the friction end part, so that the lead rubber earthquake isolation support synchronously slides relative to limit the horizontal shearing deformation of the earthquake isolation support to avoid shearing damage, and meanwhile, the magnitude of the earthquake force transmitted to the upper structure by the earthquake isolation device for resisting the rare earthquakes is also limited, so that the earthquake isolation device for resisting the rare earthquakes still has a strong earthquake isolation effect under the rare earthquakes.
Referring to fig. 2 and 3, in a first aspect, the present invention provides a seismic isolation apparatus 100 for resisting rare earthquakes, for isolating earthquakes in rare earthquakes, comprising a sliding component 10 and a seismic isolation support 20, wherein the sliding component 10 comprises a base 11 and a sliding panel 12 arranged on top of the base 11, and the sliding panel 12 is used for sliding on the top surface of the base 11 against friction; the shock insulation support 20 is used for deforming energy consumption to realize shock absorption, the shock insulation support 20 comprises a support main body 21 and a lower connecting plate 22 arranged at the bottom of the support main body 21, and the lower connecting plate 22 is arranged on the sliding panel 12 and slides synchronously with the sliding panel 12.
When rare earthquakes occur, the support main body 21 of the vibration isolation support 20 receives larger shearing force, when the horizontal shearing force received by the support main body 21 exceeds the friction force between the sliding panel 12 and the top of the substrate 11, the support main body 21 slides on the top of the substrate 11 through the lower connecting plate 22 and the connected sliding panel 12 so as to limit the horizontal shearing deformation of the vibration isolation support 20 to avoid shearing damage, and meanwhile, a large amount of earthquake energy is absorbed in the sliding process of the sliding panel 12 on the top of the substrate 11, so that the vibration isolation effect is achieved. Wherein, the support main 21 may be a damper block made of a material having a cushioning property, such as rubber, silica gel, etc., and the rubber damper block is preferred in this embodiment; alternatively, the support body may also be a shock absorber block of composite material, such as a lead rubber support. The function of the shock insulation support 20 is to insulate against earthquake and rare earthquakes, when rare earthquakes occur, the shear force applied to the support main body 21 is insufficient to drive the support main body 21 to slide on the base 11 through the lower connecting plate 22 connected with the sliding panel 12, so that the shock absorption function during rare earthquakes mainly depends on the deformation energy consumption shock absorption of the support main body 21 of the shock insulation support 20. Therefore, the earthquake isolation device 100 resistant to rare earthquakes combines the advantages of the lead rubber support and the sliding earthquake isolation support, solves the problem that the lead rubber support cannot exert the earthquake-resistant effect of temperature under the action of earthquakes with different intensities, and can meet the requirement of multistage earthquake-resistant fortification.
The mechanical analysis of the seismic isolation apparatus 100 against very rare earthquakes can be reduced to a tri-linear restoring force model as shown in fig. 2, according to the operating principle of the seismic isolation apparatus 100 against very rare earthquakes. In FIG. 2, F I And u I Restoring force and horizontal deformation of the seismic isolation apparatus 100, respectively, against very rare earthquakes; u (u) Y And u SL Yield displacement and slip displacement, respectively, of the seismic isolation apparatus 100 that is resistant to very rare earthquakes; q (Q) D And Q SL The yield forces of the seismic isolation apparatus 100, respectively, against very rare earthquakes (Q because no relative slip occurs at this time D Yield force of the lead rubber shock insulation support) and slip force; k (k) E 、k I And k SL The pre-yield elastic stiffness, post-yield stiffness, and post-slip stiffness of the shock insulation 100, respectively, that are resistant to very rare earthquakes (assuming generally k SL =0), where k E And k I The pre-yielding elastic rigidity and the post-yielding rigidity of the lead rubber shock insulation support can also be regarded as. Since the seismic isolation apparatus 100 resistant to rare earthquakes essentially functions as a lead rubber seismic isolation support thereof under the effects of fortification and rare earthquakes, the basic mechanical performance parameters of the seismic isolation apparatus 100 resistant to rare earthquakes can be defined based on the mechanical performance parameters of the lead rubber seismic isolation support.
According to the earthquake isolation device 100 for resisting rare earthquakes, the sliding component 10 and the earthquake isolation support 20 are combined, the lower connecting plate 22 of the earthquake isolation support 20 is connected with the sliding panel 12 of the sliding component 10, when rare earthquakes occur, the shearing force born by the support main body 21 of the earthquake isolation support 20 is larger than the friction force between the sliding panel 12 and the top of the base 11, the support main body 21 is connected to the sliding panel 12 through the lower connecting plate 22 and slides on the base 11, so that the horizontal shearing deformation of the support main body can be limited to avoid shearing damage, the magnitude of the earthquake force transmitted to the upper structure by the earthquake isolation device for resisting rare earthquakes is limited, and meanwhile, the earthquake isolation device for resisting rare earthquakes still has higher earthquake energy dissipation capacity; meanwhile, in rare earthquakes, the horizontal shearing force born by the shock insulation support 20 is smaller than the friction force between the sliding panel 12 and the top of the substrate 11, and the shock insulation support 20 cannot slide, so that the good shock resistance of the shock insulation support 20 under fortification and rare earthquakes is inherited, and the requirement of multi-stage shock resistance fortification is met.
Referring to fig. 3, in one embodiment, a friction end 13 is formed on the top of the base 11, the friction end 13 forms a friction surface 131 toward one end side of the sliding panel 12, and the sliding panel 12 is disposed on the friction surface 131 and is used to slide on the friction surface 131 against the friction force. The sliding panel 12 is arranged on the friction end part 13, the friction surface 131 is used for supporting the sliding panel 12, when an earthquake occurs, the sliding panel 12 has a tendency of relative movement with the friction end part 13, and the sliding panel 12 can slide only when the horizontal shearing force applied by the shock insulation support 20 is larger than the friction force; that is, under the condition of rare earthquakes, after the shock insulation support 20 receives excessive shearing force, the sliding panel 12 can slide, and at the moment, the shock insulation support 20 and the sliding component 10 cooperate to realize a shock insulation effect.
Referring to FIG. 3, in one embodiment, the skid member 10 is a skid isolation mount. The sliding component 10 adopts a sliding shock-proof support to ensure the shock resistance under rare earthquakes. When the horizontal shearing force of the shock insulation support 20 is greater than the friction force of the sliding panel 12, the shock insulation support 20 will slide relatively along with the sliding panel 12, so that the degree of shear deformation of the shock insulation support 20 is limited, deformation and damage are avoided, and the shock insulation effect under rare earthquakes is ensured.
Referring to fig. 3, in one embodiment, the slip panel 12 is a polytetrafluoroethylene panel. Polytetrafluoroethylene plates (also called tetrafluoro plates, teflon plates) are separately molded and turned. The polytetrafluoroethylene plate has extremely excellent comprehensive performance: high and low temperature resistance (-192 ℃ to 260 ℃), corrosion resistance (strong acid, strong alkali, aqua regia, etc.), weather resistance, high insulation, high lubrication, non-adhesion, no toxicity, etc. By using the polytetrafluoroethylene panel as the sliding panel 12, the service life of the sliding shock insulation support can be ensured, and the comprehensive performance of the sliding shock insulation support can be improved.
In one embodiment, the shock mount 20 is a rubber shock mount. The rubber shock-insulating support is selected as the shock-insulating support 20, and the shock-insulating performance of the rubber material is utilized to improve the overall shock resistance.
In one embodiment, the shock mount 20 is a lead rubber shock mount. The lead rubber vibration isolation support is selected as the vibration isolation support 20, and the overall vibration resistance of the vibration isolation device 100 resisting rare earthquakes is improved by utilizing the good vibration isolation effect of the lead rubber vibration isolation support. The present application prefers a lead rubber shock insulation support as the shock insulation support 20.
Referring to FIGS. 2 and 3, in one embodiment, the coefficient of friction f between the slip panel 12 and the top surface of the substrate 11 SL Is that
Wherein q D In order to resist the very rare earthquakes, the flexural-to-gravity ratio of the seismic isolation device 100, G is the rubber shear modulus of the lead rubber seismic isolation mount, σ is the vertical compressive stress of the lead rubber seismic isolation mount, u SL To resist the sliding displacement, T, of the seismic isolation apparatus 100 in rare earthquakes R The thickness of the rubber layer of the lead core rubber shock insulation support is equal to that of the rubber layer of the lead core rubber shock insulation support. From the above formula of the friction coefficient, the friction coefficient can be determined according to the desired slip displacement. Wherein the slip-up displacement u is suggested SL The size can be equal to that of the lead rubber shock insulation support of the shock insulation device 100 resisting the rare earthquakes under the action of the rare earthquakesThe seat is subject to maximum horizontal shear deformation. When the specifications of the seismic isolation apparatus 100 against very rare earthquakes are uniform (i.e., the specifications of the lead rubber seismic isolation mounts are uniform), and the number of the seismic isolation apparatus 100 against very rare earthquakes is N, according to the document "design of seismic isolation structures", the period T of the seismic isolation apparatus 100 against very rare earthquakes I Diameter D of rubber shock insulation support with lead core, rubber shearing modulus G, vertical pressure sigma born by support, total thickness T of internal rubber layer R And a second shape coefficient S 2 (i.e., diameter D and total internal rubber layer thickness T) R Ratio of (c) there is a relationship as follows:
wherein g is gravitational acceleration. For parameter Q SL Then it depends on the coefficient of friction f between the polytetrafluoroethylene plate and the friction end 13 SL And the vertical pressure sigma borne by the support. According to the working mechanism of the seismic isolation apparatus 100 against rare earthquakes, the lead rubber seismic isolation support does not slide under rare earthquakes, but slides under the action of rare earthquakes, so there are:
the seismic isolation period T of the seismic isolation apparatus 100 that accounts for resistance to very rare earthquakes I Rigidity k after yielding with lead core rubber shock insulation support I The following relationship exists:
where W is the total weight that the seismic isolation apparatus 100 is subjected to resist very rare earthquakes, namely:
the friction coefficient f can be obtained by integrating the above formula SL Is an expression of (2).
In a second aspect, the present invention provides a method of building insulation using an apparatus 100 for insulation against rare earthquakes as described above, the method comprising:
assembling to form a seismic isolation apparatus 100 resistant to very rare earthquakes, and arranging the seismic isolation bearing 20 on the sliding component 10 so that the lower connecting plate 22 of the seismic isolation bearing 20 is connected with the sliding panel 12 of the sliding component 10;
at the bottom of the building, a seismic isolation apparatus 100 is provided to resist rare earthquakes, the base 11 of the skid member 10 is used to connect with the foundation, and the mount body 21 of the seismic isolation mount 20 is used to connect with the building.
By adopting the method for fortifying rare earthquakes, when rare earthquakes occur, the support main body 21 of the shock insulation support 20 is subjected to shear deformation energy consumption to buffer earthquake impact, when the horizontal shearing force received by the shock insulation support 20 is larger than the friction force between the sliding panel 12 and the top of the substrate 11, the support main body 21 pushes the sliding panel 12 to overcome the friction force to slide through the lower connecting plate 22, so that the horizontal shear deformation of the support main body 21 can be limited to avoid shear damage, and the magnitude of the earthquake force transmitted to the upper structure by the shock insulation device resisting the rare earthquakes is limited, thereby absorbing a large amount of earthquake energy to realize the effect of buffering the earthquake impact.
According to the building earthquake isolation method provided by the invention, on the basis of utilizing the earthquake isolation device 100 for resisting rare earthquakes to conduct earthquake isolation, the earthquake isolation building is ensured to have good earthquake resistance under the rare earthquakes, and the requirement of multistage earthquake protection is met.
In one embodiment, the method further comprises: the coefficient of friction between the slip panel 12 and the top surface of the base 11 is adjusted so that the slip panel 12 slips in rare earthquakes. By adjusting the friction coefficient between the sliding panel 12 and the top surface of the base 11, the shearing force received by the lead rubber shock insulation support is larger than the friction force in rare earthquakes, and the lead rubber shock insulation support can slide on the friction surface 131, so that the shock insulation device 100 resisting rare earthquakes still has good shock resistance in rare earthquakes.
In one embodiment, in the step of adjusting the coefficient of friction between the slip panel 12 and the top surface of the substrate 11: the sliding displacement is set to be the same as the maximum horizontal shear deformation of the seismic isolation apparatus 100 against rare earthquakes. By setting the sliding displacement to be the same as the maximum horizontal shear deformation of the seismic isolation device 100 against the rare earthquakes, the seismic resistance of the seismic isolation device 100 against the rare earthquakes is made more excellent.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. A seismic isolation apparatus resistant to rare earthquakes for use in the isolation of earthquakes, comprising:
the sliding component comprises a substrate and a sliding panel arranged on the top of the substrate, wherein the sliding panel is used for sliding on the top surface of the substrate against friction;
the vibration isolation support is used for deforming and dissipating energy to realize vibration reduction, and comprises a support main body and a lower connecting plate arranged at the bottom of the support main body, wherein the lower connecting plate is arranged on the sliding panel and slides synchronously with the sliding panel;
the sliding panel is a polytetrafluoroethylene panel, the shock insulation support is a lead rubber shock insulation support,
coefficient of friction f between the slip panel and the top surface of the substrate SL Is that
Wherein q D Qu Chongbi for the seismic isolation device resistant to very rare earthquakes, G is the leadRubber shear modulus of the rubber shock insulation support, sigma is vertical compressive stress of the lead rubber shock insulation support, u SL For the slip displacement, T, of the shock insulation device resisting very rare earthquakes R The thickness of the rubber layer of the lead core rubber shock insulation support is equal to that of the rubber layer of the lead core rubber shock insulation support.
2. The shock isolation device resistant to rare earthquakes according to claim 1, characterized in that: the top of the base is provided with a friction end part, the friction end part faces one end side of the sliding panel to form a friction surface, and the sliding panel is arranged on the friction surface and used for overcoming friction force to slide on the friction surface.
3. The shock isolation device resistant to rare earthquakes according to claim 2, characterized in that: the sliding component is a sliding shock insulation support.
4. A seismic isolation apparatus that resists rare earthquakes according to any one of claims 1 to 3, characterized in that: the shock insulation support is a rubber shock insulation support.
5. A building seismic isolation method for use in the prevention of very rare earthquakes using the seismic isolation apparatus of any one of claims 1 to 4, characterized in that the building seismic isolation method comprises:
assembling to form a seismic isolation device resisting very rare earthquakes, and arranging a seismic isolation support on a sliding component so that a lower connecting plate of the seismic isolation support is connected with a sliding panel of the sliding component;
the base of the sliding component is used for being connected with the foundation, and the support body of the shock insulation support is used for being connected with the building.
6. The building seismic isolation method of claim 5, further comprising:
and adjusting the friction coefficient between the sliding panel and the top surface of the substrate so that the sliding panel slides in rare earthquakes.
7. The building vibration isolation method according to claim 6, wherein in the step of adjusting the friction coefficient between the slip panel and the top surface of the base: the sliding displacement is set to be the same as the maximum horizontal shear deformation of the shock isolation device resisting the rare earthquakes under the action of the rare earthquakes.
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| CN2021114132561 | 2021-11-25 | ||
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| KR101397804B1 (en) * | 2014-01-10 | 2014-05-20 | 주식회사 디알비동일 | Vibration isolation module for earthquake reduction |
| CN106320557A (en) * | 2016-10-26 | 2017-01-11 | 南京工业大学 | Seismic isolation bearing with multistage self-reset capacity |
| CN208347000U (en) * | 2018-06-26 | 2019-01-08 | 兰州工业学院 | A kind of limit-type friction energy-dissipating type combined isolation device of classification |
| CN110424547B (en) * | 2019-06-25 | 2021-11-19 | 上海大学 | Variable friction sliding shock insulation support |
| CN211447998U (en) * | 2019-11-28 | 2020-09-08 | 华中科技大学 | Staged sliding double-sliding-surface shock insulation support |
| CN212689245U (en) * | 2020-05-28 | 2021-03-12 | 万力轮胎股份有限公司 | Shock insulation slide support |
| CN112302188A (en) * | 2020-11-13 | 2021-02-02 | 河海大学 | Multistage shock-insulation rubber-sliding system support and shock insulation effect calculation method thereof |
| CN213805856U (en) * | 2020-11-19 | 2021-07-27 | 衡水震泰隔震器材有限公司 | Double-step sliding friction pendulum shock insulation support |
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