High-altitude corridor support with variable rigidity

Abstract

The invention relates to the technical field of earthquake resistance of corridor supports, and discloses a variable-rigidity high-altitude corridor support which comprises a first mounting steel plate, a second mounting steel plate and a third mounting steel plate. Locking pieces connected with the third mounting steel plate are arranged at the four corners of the first shock insulation support, the four corners of the second shock insulation support and the four corners of the second mounting steel plate in a penetrating mode, and shearing grooves are formed in the locking pieces; the first shock insulation support and the second shock insulation support are both used for conducting shock absorption on the high-altitude corridor support so that variable stiffness control over the high-altitude corridor support can be achieved. According to the invention, a set of multi-level rigidity-variable seismic isolation support is constructed, and based on a unique mechanical response mechanism of a multi-level seismic isolation system, when the seismic action intensity is in an increasing trend, the interaction force between the high-altitude corridor and the towers on the two sides is in a decreasing situation, and the seismic isolation effect is improved. Due to the characteristic, the anti-seismic toughness and stability of the whole structure in earthquake disasters are remarkably improved, and reliable guarantee is provided for the safety performance of a high-rise building structure in a complex earthquake environment.

Description

Technical Field

[0001] The invention relates to the technical field of corridor support anti-seismic, and in particular to a high-altitude corridor support with variable stiffness. Background Art

[0002] The connection between the high-altitude corridor and the tower and the overall force mechanism are complex. Under the action of strong winds or earthquakes, the high-altitude corridor structure interacts and coordinates with the towers on both sides to deform, which not only brings great difficulties to the seismic design, but also easily causes local damage to the structure.

[0003] In the existing technology, the energy consumption mode of the corridor bearing currently used in engineering practice is relatively simple. The traditional plate rubber bearing has limited ability to constrain the horizontal displacement of the main body by relying only on friction during use. Therefore, the existing seismic isolation rubber bearings used in high-altitude corridors have certain limitations in use. In addition, after the damping and stiffness parameters of the laminated rubber bearing are determined, they cannot be adjusted during work, which has many restrictions on its seismic isolation performance and is not applicable to high-rise and super-high-rise buildings.

[0004] The connection nodes need to adapt to the deformation and force transmission requirements of the seismic isolation bearings under normal use and different seismic conditions. While ensuring the integrity of the structure, they must be able to effectively transmit and disperse seismic forces to avoid stress concentration that leads to premature damage to the connection parts or even the tower. Technical difficulties such as the structural form of the connection nodes, mechanical properties analysis, and seismic reinforcement measures need to be resolved.

[0005] Therefore, how to provide a high-altitude corridor support with variable stiffness to achieve variable stiffness control and reuse of the support has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a high-altitude corridor support with variable stiffness to achieve variable stiffness control and repeated use of the support.

[0007] To this end, an embodiment of the present invention discloses a high-altitude corridor support with variable stiffness, comprising: a first mounting steel plate, a second mounting steel plate and a third mounting steel plate which are sequentially distributed in layers along a top-down direction; wherein, at least one first seismic isolation support is installed between the first mounting steel plate and the second mounting steel plate, a second seismic isolation support is installed between the second mounting steel plate and the third mounting steel plate, the four corners of the second mounting steel plate are provided with locking pieces connected to the third mounting steel plate, and the locking pieces are provided with shear grooves; the first seismic isolation support and the second seismic isolation support are both used to reduce shock to the high-altitude corridor support to achieve variable stiffness control of the high-altitude corridor support.

[0008] The present invention is further configured such that the number of the first seismic isolation bearings is set to four, and the four first seismic isolation bearings are distributed between the first mounting steel plate and the second mounting steel plate at equal intervals.

[0009] The present invention is further configured such that the first seismic isolation support includes a first connecting steel plate and a second connecting steel plate, and a lead core rubber seismic isolation member is installed between the first connecting steel plate and the second connecting steel plate.

[0010] The present invention is further configured such that the lead core rubber seismic isolation component includes a first rubber layer, a first steel plate layer and a first lead core, a plurality of the first rubber layers and a plurality of the first steel plate layers are alternately stacked in sequence, and the first lead core is located at the center of the lead core rubber seismic isolation component.

[0011] The present invention is further configured such that the first rubber layer is a circular thin rubber, and the first steel plate layer is a circular thin steel plate.

[0012] The present invention is further configured such that the second seismic isolation bearing comprises a second rubber layer and a second steel plate layer, and a plurality of the second rubber layers and a plurality of the second steel plate layers are alternately stacked in sequence.

[0013] The present invention is further configured such that the second rubber layer is a circular thick rubber, and the second steel plate layer is a circular thin steel plate.

[0014] The present invention is further configured such that the shearing groove is located in the middle of the locking member, and the inner wall of the shearing groove is two symmetrically arranged concave inclined surfaces.

[0015] The present invention is further configured such that the locking member includes a locking screw, one end of the locking screw is provided with a locking nut, and the locking screw is threadedly connected to the third mounting steel plate.

[0016] The present invention is further configured such that a gap exists between the locking nut and the second mounting steel plate.

[0017] The present invention has the following beneficial effects: the first seismic isolation bearing is used to reduce the shock of the high-altitude corridor bearing under frequent earthquakes and fortified earthquake conditions, the locking piece is sheared off under rare earthquake conditions, and the second seismic isolation bearing is used to reduce the shock of the high-altitude corridor bearing, thereby providing a high-altitude corridor bearing with variable stiffness, realizing variable stiffness control of the bearing, and after the earthquake, only the sheared locking piece needs to be replaced to achieve the reuse of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a high-altitude corridor support with variable stiffness disclosed in this embodiment;

[0020] Figure 2 is a top view schematic diagram of a high-altitude corridor support with variable stiffness disclosed in this embodiment;

[0021] Figure 3 yes Figure 2 AA cross-sectional structural diagram;

[0022] Figure 4 yes Figure 2 BB cross-sectional structure diagram;

[0023] Figure 5 is a schematic diagram of the side view structure of a high-altitude corridor support with variable stiffness disclosed in this embodiment;

[0024] Figure 6 yes Figure 5 Schematic diagram of CC cross-section structure;

[0025] Figure 7 It is a structural schematic diagram of a first seismic isolation support in a high-altitude corridor support with variable stiffness disclosed in this embodiment;

[0026] Figure 8 It is a partial structural schematic diagram of a high-altitude corridor support with variable stiffness disclosed in this embodiment;

[0027] Fig. 9 It is a structural schematic diagram of a locking member in a high-altitude corridor support with variable stiffness disclosed in this embodiment;

[0028] Fig.10 This is a diagram showing the relationship between stiffness and force of a high-altitude corridor support with variable stiffness disclosed in this embodiment.

[0029] Figure numerals: 1. first mounting steel plate; 2. second mounting steel plate; 3. third mounting steel plate; 4. first seismic isolation bearing; 41. first connecting steel plate; 42. second connecting steel plate; 43. lead rubber seismic isolation member; 431. first rubber layer; 432. first steel plate layer; 433. first lead core; 5. second seismic isolation bearing; 51. second rubber layer; 52. second steel plate layer; 6. locking member; 61. locking screw; 611. shear groove; 62. locking nut. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] The embodiment of the present invention discloses a high-altitude corridor support with variable stiffness, such as Figure 1-9 As shown, it includes: a first mounting steel plate 1, a second mounting steel plate 2 and a third mounting steel plate 3 which are distributed in layers in sequence from top to bottom; wherein, at least one first seismic isolation bearing 4 is installed between the first mounting steel plate 1 and the second mounting steel plate 2, and a second seismic isolation bearing 5 is installed between the second mounting steel plate 2 and the third mounting steel plate 3, and the four corners of the second mounting steel plate 2 are all penetrated by locking pieces 6 connected to the third mounting steel plate 3, and the locking pieces 6 are provided with shear grooves 611; the first seismic isolation bearing 4 and the second seismic isolation bearing 5 are both used for shock absorbing of the high-altitude corridor bearing to realize variable stiffness control of the high-altitude corridor bearing.

[0035] It should be noted that the first seismic isolation bearing 4 is used to reduce the shock of the high-altitude corridor bearing under frequent earthquakes and fortified earthquake conditions, the locking piece 6 is sheared off under rare earthquake conditions, and the second seismic isolation bearing 5 is used to reduce the shock of the high-altitude corridor bearing, thereby providing a high-altitude corridor bearing with variable stiffness, realizing variable stiffness control of the bearing, and after the earthquake, only the sheared locking piece 6 needs to be replaced to achieve the reuse of the bearing.

[0036] It should also be noted that the present invention constructs a set of multi-level variable stiffness seismic isolation bearings. When frequent earthquakes occur, the first seismic isolation bearing 4 ensures that the fixed bearing can maintain a normal functional state by adjusting its pre-yield stiffness characteristics. Under the fortified earthquake, the shock absorption mechanism of the first seismic isolation bearing 4 is activated for the high-altitude corridor bearing to weaken the transmission and response of seismic energy. When a rare earthquake strikes, the replaceable locking member arranged at a specific position breaks under the action of a strong seismic shear force. At this time, the second seismic isolation bearing 5 is activated and cooperates with the first seismic isolation bearing 4 to form a new shock absorption working system, thereby achieving effective control of the variable stiffness characteristics of the high-altitude corridor bearing. Based on the unique mechanical response mechanism of this multi-level seismic isolation system, when the intensity of the earthquake action shows an increasing trend, the interaction force between the high-altitude corridor and the towers on both sides shows a decreasing trend. This characteristic significantly improves the seismic toughness and stability of the overall structure in earthquake disasters, and provides a reliable guarantee for the safety performance of high-rise building structures in complex earthquake environments.

[0037] like Figure 1-7 As shown, the number of the first seismic isolation supports 4 is set to four, and the four first seismic isolation supports 4 are evenly spaced and distributed between the first mounting steel plate 1 and the second mounting steel plate 2. It should be noted that since the number of the first seismic isolation supports 4 is set to four, the high-altitude corridor supports are better damped.

[0038] like Figure 7 As shown, the first seismic isolation support 4 includes a first connecting steel plate 41 and a second connecting steel plate 42 , and a lead rubber seismic isolation member 43 is installed between the first connecting steel plate 41 and the second connecting steel plate 42 .

[0039] like Figure 6 and Figure 7 As shown, the lead rubber seismic isolation member 43 includes a first rubber layer 431, a first steel plate layer 432 and a first lead core 433. A plurality of first rubber layers 431 and a plurality of first steel plate layers 432 are alternately stacked in sequence, and the first lead core 433 is located at the center of the lead rubber seismic isolation member 43. It should be noted that since a plurality of first rubber layers 431 and a plurality of first steel plate layers 432 are alternately stacked in sequence, the shock absorbing capacity of the first seismic isolation support 4 is improved.

[0040] like Figure 6 and Figure 7As shown, the first rubber layer 431 is a circular thin rubber, and the first steel plate layer 432 is a circular thin steel plate.

[0041] like Figure 1-9 As shown, the second seismic isolation support 5 includes a second rubber layer 51 and a second steel plate layer 52, and a plurality of second rubber layers 51 and a plurality of second steel plate layers 52 are alternately stacked in sequence. It should be noted that since the plurality of second rubber layers 51 and a plurality of second steel plate layers 52 are alternately stacked in sequence, the shock absorbing capacity of the second seismic isolation support 5 is improved.

[0042] like Figure 3 , Figure 4 and Figure 6 As shown, the second rubber layer 51 is a circular thick rubber, and the second steel plate layer 52 is a circular thin steel plate.

[0043] like Figure 1 and Fig. 9 As shown, the shear groove 611 is located in the middle of the locking member 6, and the inner wall of the shear groove 611 is two symmetrically arranged concave inclined surfaces. It should be noted that, since the inner wall of the shear groove 611 is two symmetrically arranged concave inclined surfaces, when the external force is large, the locking member 6 is quickly sheared off, so that the second seismic isolation support 5 starts to work.

[0044] like Figure 1-9 As shown, the locking member 6 includes a locking screw 61, one end of which is provided with a locking nut 62, and the locking screw 61 is threadedly connected to the third mounting steel plate 3. In the specific implementation process, the screw is threadedly connected to the second mounting steel plate 2. It should be noted that the locking screw 61 and the locking nut 62 are an integrally formed structure, so that the structure of the locking member 6 is simple and the manufacturing cost is low.

[0045] like Figure 4 and Figure 6 As shown, there is a gap between the locking nut 62 and the second mounting steel plate 2. It should be noted that due to the gap between the locking nut 62 and the second mounting steel plate 2, the second seismic isolation support 5 of the lower layer can coordinate the vertical deformation, and the multiple first seismic isolation supports 4 of the upper layer are stressed at the same time.

[0046] The invention discloses a high-altitude corridor support with variable stiffness, which is a double-layer design, can be deformed and coordinated under different working conditions, and realizes three-stage variable stiffness control. Fig.10 As shown, assuming that the upper support stiffness is K1 and the lower support stiffness is K2:

[0047] Stage 1: Under normal use, the lower part of the support is locked by the screw, and the upper lead core is not yielded. The overall stiffness of the support is determined by the upper support, and the overall stiffness of the support is the stiffness Ku1 of the upper lead core before it yields.

[0048] Stage 2: When the force is large, the lower part of the support is locked by the screw, the upper lead core yields and starts working, the stiffness decreases, the support has a certain energy dissipation effect, and the overall stiffness of the support is still determined by the upper support. The overall stiffness of the support is the stiffness Kd1 after the upper lead core yields;

[0049] Stage three: When the force is very large, the shear groove 611 of the lower locking screw 61 is sheared, and the lower second seismic isolation bearing 5 starts to work. The overall stiffness of the bearing decreases significantly, and the energy consumption effect is obvious. At this time, the bearing stiffness is mainly determined by the lower second seismic isolation bearing 5. Since the upper bearing stiffness is much greater than the lower bearing, the overall stiffness of the bearing is K2.

[0050] After the earthquake, the high-altitude corridor supports can be reused by simply replacing the cut locking screws.

[0051] It should be noted that the present invention uses multiple small lead rubber bearings on the upper layer and a locking screw is arranged at each of the four corners of the lower layer, which significantly increases the initial stiffness compared to traditional laminated seismic isolation bearings. The locking screws arranged in the lower layer of the bearing can coordinate the deformation of the thick laminated rubber bearing in the vertical direction. If the external force increases further, the lead core will yield and the stiffness of the bearing will decrease. Through a certain deformation, the internal force of the structural components on both sides will be reduced. When encountering extremely large external forces such as rare earthquakes, the stiffness of the bearing will be greatly reduced, the deformation of the bearing will be further increased, and the internal force of the structural components of the towers on both sides will be very small. The bearing plays a role of plastic energy dissipation, thereby realizing the three-stage working characteristics of the bearing and achieving a shock-absorbing effect.

[0052] Working principle: The first seismic isolation bearing 4 is used to reduce the shock of the high-altitude corridor bearing under frequent earthquakes and fortified earthquake conditions. The locking piece 6 is sheared off under rare earthquake conditions. The second seismic isolation bearing 5 is used to reduce the shock of the high-altitude corridor bearing, thereby providing a high-altitude corridor bearing with variable stiffness, realizing variable stiffness control of the bearing. After the earthquake, only the sheared locking piece 6 needs to be replaced to achieve the reuse of the bearing.

[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A high-altitude corridor support with variable stiffness, characterized in that: include: A first installation steel plate (1), a second installation steel plate (2) and a third installation steel plate (3) which are sequentially distributed in layers from top to bottom; Wherein, at least one first seismic isolation support (4) is installed between the first mounting steel plate (1) and the second mounting steel plate (2), a second seismic isolation support (5) is installed between the second mounting steel plate (2) and the third mounting steel plate (3), and locking members (6) connected to the third mounting steel plate (3) are provided at four corners of the second mounting steel plate (2), and a shearing groove (611) is provided on the locking member (6); The first seismic isolation support (4) and the second seismic isolation support (5) are both used to reduce vibration of the high-altitude corridor support, so as to achieve variable stiffness control of the high-altitude corridor support.

2. The variable stiffness high-altitude corridor support according to claim 1 is characterized in that: The number of the first seismic isolation supports (4) is set to four, and the four first seismic isolation supports (4) are distributed at equal intervals between the first mounting steel plate (1) and the second mounting steel plate (2).

3. The high-altitude corridor support with variable stiffness according to claim 1 or 2, characterized in that: The first seismic isolation support (4) comprises a first connecting steel plate (41) and a second connecting steel plate (42), and a lead core rubber seismic isolation member (43) is installed between the first connecting steel plate (41) and the second connecting steel plate (42).

4. The variable stiffness high-altitude corridor support according to claim 3 is characterized in that: The lead rubber seismic isolation member (43) comprises a first rubber layer (431), a first steel plate layer (432) and a first lead core (433), wherein a plurality of the first rubber layers (431) and a plurality of the first steel plate layers (432) are alternately stacked in sequence, and the first lead core (433) is located at the center of the lead rubber seismic isolation member (43).

5. The variable stiffness high-altitude corridor support according to claim 4 is characterized in that: The first rubber layer (431) is a circular thin rubber, and the first steel plate layer (432) is a circular thin steel plate.

6. The variable stiffness high-altitude corridor support according to claim 1 is characterized in that: The second seismic isolation support (5) comprises a second rubber layer (51) and a second steel plate layer (52), and a plurality of the second rubber layers (51) and a plurality of the second steel plate layers (52) are alternately stacked in sequence.

7. The variable stiffness high-altitude corridor support according to claim 6 is characterized in that: The second rubber layer (51) is a circular thick rubber, and the second steel plate layer (52) is a circular thin steel plate.

8. The variable stiffness high-altitude corridor support according to claim 1 is characterized in that: The shearing groove (611) is located in the middle of the locking member (6), and the inner wall of the shearing groove (611) is two symmetrically arranged concave inclined surfaces.

9. The high-altitude corridor support with variable stiffness according to claim 1 or 8, characterized in that: The locking member (6) comprises a locking screw (61), one end of which is provided with a locking nut (62), and the locking screw (61) is threadedly connected to the third mounting steel plate (3).

10. The variable stiffness high-altitude corridor support according to claim 9, characterized in that: There is a gap between the locking nut (62) and the second mounting steel plate (2).

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