Instantaneous load impact resistant supporting device for large-span building

Abstract

The invention relates to an instantaneous load impact resisting supporting device for a large-span building, belongs to the technical field of building structure design, and solves the problem that an existing hinged support cannot meet the requirements of releasing temperature deformation and resisting instantaneous load impact of the large-span building. The supporting device comprises an upper support plate, a sliding rail base, a lower support plate and a multi-step stress assembly. The upper support plate is mounted outside the lower support plate in a covering manner; the lower support plate is installed above the sliding rail base in a sliding mode, and a multi-step stress assembly is arranged between the lower support plate and the sliding rail base. The multi-stage stress assembly comprises a first plate spring assembly and a second plate spring assembly. Multi-stage load buffering of large deformation or high-strength instantaneous impact of a large-span building is achieved, and the effect of resisting high-strength instantaneous load impact is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building support structures, and in particular to a support device for resisting instantaneous load impacts of large-span buildings. Background Art

[0002] Large public buildings, such as transportation hubs, typically feature a concrete frame structure for the lower main structure and a long-span steel roof, supported by spherical bearings on the tops of the substructure's cantilevered columns. As buildings grow in size, the total length of these ultra-long-span roofs has exceeded 700 meters. For such ultra-long-span structures, earthquakes and temperature conditions play a major role in controlling their impact. These ultra-long structures are significantly affected by temperature fluctuations, and the deformation of some column tops due to temperature fluctuations can significantly exceed the deformation capacity of the supporting columns, necessitating the use of sliding bearings to relieve these temperature-related deformations.

[0003] Under rare earthquakes, the relative displacement between the roof and supporting columns can be far greater than that caused by temperature fluctuations. If the bearing slippage is determined based on a rare earthquake, not only will the bearing dimensions be oversized, but the lateral stiffness of the supporting columns will also be ineffective in mitigating lateral deformation under large earthquakes. When the displacement under an earthquake exceeds the travel of the bearings to relieve thermal deformation, the long-span roof structure may collide with the column tops. The transient load dynamics could cause bearing failure or collapse of the main structure.

[0004] While existing seismic-resistant spherical bearings can achieve the load-bearing conditions required for sliding hinge connections between long-span structures and support columns, they fail to meet the functional requirements of fixed hinges during construction and sliding hinges during normal use. This makes it difficult to prevent damage from collisions during rare earthquakes after thermal deformation. Therefore, a support device for long-span buildings that can withstand transient load shocks is needed. Summary of the Invention

[0005] In view of the above analysis, the present invention aims to provide a support device for large-span buildings that can resist transient load impacts, so as to solve the problem that existing articulated supports cannot meet the requirements of large-span buildings in releasing temperature deformation and resisting transient load impacts.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A supporting device for resisting instantaneous load impact for a large-span building, comprising: an upper supporting plate, a slide rail base, a lower supporting plate and a multi-stage load-bearing component;

[0008] The upper support plate and the slide rail base are used to fix the roof and the support column of the building structure respectively;

[0009] The upper support plate cover is mounted on the outside of the lower support plate; the lower support plate is slidably mounted above the slide rail base, and a multi-stage force-bearing component is provided between the lower support plate and the slide rail base; the multi-stage force-bearing component is symmetrically arranged along the sliding direction of the lower support plate, for cushioning the movement impact of the lower support plate;

[0010] The multi-stage force-bearing component includes: a first leaf spring component, a disc spring and a second leaf spring component, and the three are connected to the lower support plate through fixing bolts; the length of the first leaf spring component is greater than the length of the second leaf spring component; the disc spring is arranged between the first leaf spring component and the second leaf spring component.

[0011] Furthermore, the curvature radius of the first leaf spring assembly is smaller than the curvature radius of the second leaf spring assembly.

[0012] Furthermore, the first leaf spring assembly and the second leaf spring assembly are both provided with a plurality of leaf springs of different lengths in parallel, and the plurality of leaf springs are arranged in descending order of length.

[0013] Furthermore, an intermediate spherical body is provided between the upper support plate and the lower support plate.

[0014] Furthermore, the upper surface of the intermediate spherical body is a plane, and the lower surface is a spherical surface.

[0015] Furthermore, an upper sliding surface stainless steel plate and an upper sliding surface plane slide plate are provided between the upper support plate and the intermediate spherical body.

[0016] Furthermore, a spherical slide plate is provided between the lower support plate and the intermediate spherical body.

[0017] Furthermore, a lower sliding surface plane slide plate and a lower sliding surface stainless steel plate are provided between the lower support plate and the slide rail base.

[0018] Furthermore, a circular boss is provided above the lower support plate; an annular sleeve portion is provided below the upper support plate; and the annular sleeve portion is sleeved on the outside of the circular boss.

[0019] A multi-stage buffering method for resisting transient load impact for large-span buildings, using the above-mentioned support device, comprises the following steps:

[0020] Step S1: The roof and supporting columns of the building structure are affected by impact or temperature and are relatively displaced; at the same time, the upper support plate is driven to be relatively displaced relative to the slide rail base;

[0021] Step S2: the lower support plate is driven by the upper support plate to slide relative to the slide rail base;

[0022] Step S3: When the lower support plate slides relative to the slide rail base, the multi-stage force-bearing component undergoes elastic deformation to achieve load buffering.

[0023] The technical solution of the present invention can achieve at least one of the following effects:

[0024] 1. The support device for resisting transient load impact for large-span buildings of the present invention is arranged between the top of the cantilever column supporting the large-span roof and the supporting column. The large-span roof structural members are reliably connected to the upper support plate, and the slide rail base is reliably connected to the column top of the supporting column, thereby realizing the internal force transmission and deformation coordination between the large-span roof and the lower supporting structure.

[0025] 2. The supporting device for resisting instantaneous load impact for large-span buildings of the present invention is designed to release the deformation of the super-long-span roof under the action of temperature during normal use by designing the lower support plate to move horizontally along the slide rail base.

[0026] 3. The support device for resisting instantaneous load impact for large-span buildings of the present invention comprises two groups of leaf spring assemblies and disc spring structures with different stiffness arranged between the end of the slide rail base and the lower support plate. This can not only ensure that the lower support plate has a reset function when the deformation is small at normal temperature, but also avoid significant collision between the lower support plate and the end point of the sliding stroke when the deformation is large due to rare earthquakes to resist instantaneous load impact, thereby realizing multi-order and multi-modal deformation buffering and avoiding damage to the support device and the main body of the building.

[0027] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following description, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0029] Figure 1 The invention provides a supporting device for resisting instantaneous load impact for a large-span building;

[0030] Figure 2 A schematic diagram of the installation method of the slide rail base of the support device for resisting instantaneous load impact for large-span buildings of the present invention;

[0031] Figure 3 A cross-sectional view in the short axis direction of the supporting device for resisting instantaneous load impact for large-span buildings of the present invention;

[0032] Figure 4 A cross-sectional view in the long axis direction of the supporting device for resisting instantaneous load impact for large-span buildings of the present invention;

[0033] Figure 5 The invention provides a multi-stage load-bearing component for a supporting device for resisting instantaneous load impacts of a large-span building;

[0034] Figure 6 Schematic diagram of the structure of the temporary fixing assembly of the supporting device for resisting instantaneous load impact of large-span buildings of the present invention Figure 1 ;

[0035] Figure 7 Schematic diagram of the structure of the temporary fixing assembly of the supporting device for resisting instantaneous load impact of large-span buildings of the present invention Figure 2 ;

[0036] Figure 8 Schematic diagram of the structure of the temporary fixing assembly of the supporting device for resisting instantaneous load impact of large-span buildings of the present invention Figure 3 ;

[0037] Figure 9 This is a schematic diagram of the first-order buffering state of the support device for resisting instantaneous load impact for large-span buildings of the present invention;

[0038] Figure 10 Schematic diagram of the second-order buffering state of the supporting device for resisting instantaneous load impact for large-span buildings of the present invention;

[0039] Figure 11 It is a schematic diagram of the third-order buffering state of the supporting device for resisting instantaneous load impact for large-span buildings of the present invention.

[0040] Reference numerals:

[0041] 1-upper support plate; 2-slide rail base; 3-temporary fixing assembly; 4-lower support plate; 5-multi-stage force-bearing assembly; 6-reserved deformation hole; 7-upper sliding surface stainless steel plate; 8-upper sliding surface flat slide plate; 9-intermediate spherical body; 10-spherical slide plate; 11-lower sliding surface flat slide plate; 12-lower sliding surface stainless steel plate; 13-first leaf spring assembly; 14-disc spring; 15-pad; 16-second leaf spring assembly; 17-fixing bolt; 18-upper horizontal fin; 19-lower horizontal fin; 20-weld; 21-bolt; 22-rotating axis; 23-strip positioning plate; 24-positioning groove; 25-positioning plate slot; 26-screw mounting hole; 27-annular sleeve; 28-circular boss; 29-fan-shaped limit portion; 30-spherical groove. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0043] Example 1

[0044] A specific embodiment of the present invention discloses a support device for resisting instantaneous load impact for a large-span building, such as Figure 1 、 Figure 2 、 Figure 5 As shown, it includes: an upper support plate 1, a sliding rail base 2, a lower support plate 4 and a multi-stage force-bearing component 5; the upper support plate 1 and the sliding rail base 2 are respectively used to fix the roof and supporting columns of the building structure; the upper support plate 1 is covered and installed on the outside of the lower support plate 4; the lower support plate 4 is slidably installed above the sliding rail base 2, and a multi-stage force-bearing component 5 is arranged between the lower support plate 4 and the sliding rail base 2; the multi-stage force-bearing component 5 is symmetrically arranged in two groups along the sliding direction of the lower support plate 4, for buffering the movement impact of the lower support plate 4; the multi-stage force-bearing component 5 includes: a first leaf spring assembly 13, a disc spring 14 and a second leaf spring assembly 16, and the three are connected to the lower support plate 4 by fixing bolts 17; the length of the first leaf spring assembly 13 is greater than the length of the second leaf spring assembly 16; the disc springs 14 are symmetrically arranged in two groups, and are arranged between the first leaf spring assembly 13 and the second leaf spring assembly 16.

[0045] Specifically, if Figure 1 、 Figure 2 As shown, the multi-stage force-bearing components 5 are symmetrically arranged in two groups on both sides of the lower support plate 4.

[0046] The support device for resisting instantaneous load impact for large-span buildings in this embodiment is arranged at the top of the cantilever column supporting the large-span roof. The large-span roof structure rod is reliably connected to the upper support plate 1, and the slide rail base 2 is reliably connected to the column top of the supporting column, thereby realizing the internal force transmission and deformation coordination between the large-span roof and the lower supporting structure.

[0047] Furthermore, if Figure 5 As shown, the curvature radius of the first leaf spring assembly 13 is smaller than the curvature radius of the second leaf spring assembly 16. Figure 2 As shown, in the initial state, the end of the first leaf spring assembly 13 contacts the edge beam of the slide rail base 2 , and the second leaf spring assembly 16 does not contact the edge beam of the slide rail base 2 .

[0048] Furthermore, the first leaf spring assembly 13 and the second leaf spring assembly 16 are both provided with a plurality of leaf springs of different lengths arranged in parallel, and the plurality of leaf springs are arranged in descending order of length.

[0049] Specifically, if Figure 5 As shown, the two disc springs 14 are both floatingly sleeved on the outside of the fixing bolt 17. Similarly, the first leaf spring assembly 13 and the second leaf spring assembly 16 can also slide relative to the fixing bolt 17 to achieve elastic deformation.

[0050] Specifically, if Figure 5 As shown, a spacer 15 is provided on the outside of each of the two disc springs 14 and is separated from the first leaf spring assembly 13 and the second leaf spring assembly 16 .

[0051] In this embodiment, Figure 10 、 Figure 11 As shown, when the second leaf spring assembly 16 contacts the slide rail base 2 and the lower support plate 4 continues to displace relative to the slide rail base 2, the distance between the first leaf spring assembly 13 and the second leaf spring assembly 16 is reduced, driving the distance between the two pads 15 to reduce, and then being able to compress the two symmetrically installed disc springs 14, so that the disc springs 14 participate in load bearing and transient impact buffering.

[0052] Furthermore, a reserved deformation hole 6 is opened on the edge beam of the slide rail base 2; the reserved deformation hole 6 is used to provide displacement space for the fixing bolt 17 when the lower support plate 4 slides.

[0053] In this embodiment, the stiffness of the first leaf spring assembly 13 is set to be the smallest and the elastic deformation displacement is the largest; the stiffness of the second leaf spring assembly 16 is greater than the stiffness of the first leaf spring assembly 13, and the elastic deformation displacement of the second leaf spring assembly 16 is smaller than the elastic deformation displacement of the first leaf spring assembly 13 under the same elastic force; the stiffness of the disc spring 14 is greater than the stiffness of the second leaf spring assembly 16, and the elastic deformation displacement is the smallest under the same elastic force.

[0054] When implementing, if Figure 9 As shown, when the temperature deformation / instantaneous load impact is small, the first leaf spring assembly 13 of the multi-stage force-bearing assembly 5 serves as a force-bearing deformation structure, and is used to bear the relative displacement between the upper support plate 1 and the slide rail base 2 caused by the temperature deformation / instantaneous load; since the stiffness of the second leaf spring assembly 16 of the first leaf spring assembly 13 is the smallest, it is most likely to undergo elastic deformation, and is mainly used to adapt to the relative displacement of the structural body of the building structure caused by temperature changes (thermal expansion and contraction). At the same time, through the relative sliding between the lower support plate 4 and the slide rail base 2, the structural stress of the building structure caused by temperature influence can be released.

[0055] like Figure 10As shown, when the instantaneous load impact is large (low-level earthquake state), the first leaf spring assembly 13, disc spring 14 and second leaf spring assembly 16 of the multi-stage load-bearing assembly 5 simultaneously serve as a load-bearing deformation structure, which is used to bear the relative displacement between the upper support plate 1 and the slide rail base 2 caused by temperature deformation / instantaneous load; since the combined stiffness of the first leaf spring assembly 13, disc spring 14 and second leaf spring assembly 16 is relatively large, the overall deformation amount of the elastic deformation caused by the load is small, which can be used to buffer vibration impact, and at the same time, through the relative sliding between the lower support plate 4 and the slide rail base 2, the destructive stress caused by the instantaneous load on the building structure can be reduced.

[0056] like Figure 11 As shown, when the instantaneous load impact is very large (high-level earthquake state), the first leaf spring assembly 13 and the second leaf spring assembly 16 of the multi-stage load-bearing assembly 5 are both deformed to the maximum deformation state, and the second leaf spring assembly 16 is in contact with the edge beam of the slide rail base 2. At the same time, the disc spring 14 acts as an elastic buffer deformation structure to bear the huge instantaneous load and prevent the destructive deformation or collapse of the building structure caused by excessive relative displacement between the upper support plate 1 and the slide rail base 2. Due to the large deformation stiffness of the disc spring 14, it can be used to buffer high-energy vibration impacts, while limiting the relative slip between the lower support plate 4 and the slide rail base 2, and can buffer the destructive stress generated by the instantaneous load on the building structure.

[0057] Furthermore, an intermediate spherical body 9 is provided between the upper support plate 1 and the lower support plate 4 .

[0058] like Figure 3 、 Figure 4 As shown, the upper surface of the intermediate spherical body 9 is flat, and the lower surface is spherical. In this embodiment, the lower support plate 4 and the upper support plate 1 are articulated via the intermediate spherical body 9. When the main structure of the building is affected by temperature fluctuations or high-intensity transient loads, the intermediate spherical body 9 enables a small relative deflection between the lower support plate 4 and the upper support plate 1, thereby eliminating the destructive stress caused by temperature deformation or high-intensity transient impacts, and maintaining the overall stability and safety of the building structure.

[0059] Furthermore, an upper sliding surface stainless steel plate 7 and an upper sliding surface flat slide plate 8 are provided between the upper support plate 1 and the intermediate spherical body 9 .

[0060] Specifically, if Figure 3 As shown, the upper sliding surface stainless steel plate 7 is bonded and fixed to the lower bottom surface of the upper support plate 1; the upper sliding surface plane slide plate 8 is fixed to the upper surface of the intermediate spherical body 9.

[0061] Furthermore, if Figure 3 、 Figure 4As shown, a spherical slide plate 10 is provided between the lower support plate 4 and the intermediate spherical body 9 .

[0062] Specifically, if Figure 4 As shown, the spherical slide plate 10 is fixedly installed in the spherical groove 30 on the upper surface of the lower support plate 4.

[0063] Furthermore, if Figure 3 、 Figure 4 As shown, a lower sliding surface flat slide plate 11 and a lower sliding surface stainless steel plate 12 are provided between the lower support plate 4 and the slide rail base 2 .

[0064] Specifically, the lower sliding surface planar slide plate 11 is fixedly mounted on the lower surface of the lower support plate 4 ; the lower sliding surface stainless steel plate 12 is fixedly mounted on the upper surface of the slide groove of the slide rail base 2 .

[0065] Preferably, the upper sliding surface planar slide plate 8, the spherical slide plate 10 and the lower sliding surface planar slide plate 11 are all polytetrafluoroethylene slide plates.

[0066] Furthermore, if Figure 1 、 Figure 2 As shown, a circular boss 28 is provided above the lower support plate 4 ; an annular sleeve portion 27 is provided below the upper support plate 1 ; the annular sleeve portion 27 is sleeved on the outside of the circular boss 28 .

[0067] In this embodiment, Figure 2 As shown, a plurality of sector-shaped limiting portions 29 are provided on the outer side of the circular boss 28 ; the sector-shaped limiting portions 29 are distributed at intervals on the periphery of the circular boss 28 .

[0068] Correspondingly, a limiting groove that cooperates with the fan-shaped limiting portion 29 is provided on the inner side of the annular sleeve portion 27 of the upper support plate 1; preferably, the central angle corresponding to the limiting groove is greater than the central angle corresponding to the fan-shaped limiting portion 29; in this embodiment, by arranging the upper support plate 1 and the lower support plate 4 to cooperate with each other through the circular boss 28 and the annular sleeve portion 27, and arranging the fan-shaped limiting portion 29 and the limiting groove to cooperate, it is possible to allow a slight circumferential rotation angle between the upper support plate 1 and the lower support plate 4, thereby realizing the release of the internal torsional stress of the building structure as a whole under the influence of temperature changes or instantaneous load impact, thereby ensuring the structural strength and stability of the building structure as a whole.

[0069] Furthermore, in order to achieve symmetrical installation of two sets of multi-stage load-bearing components 5 and enable them to serve as a load-bearing structure to bear transient loads after installation; in this embodiment, a temporary fixing component 3 is used to releasably fix the lower support plate 4 and the slide rail base 2.

[0070] In this embodiment, three structural forms of temporary fixing components 3 are provided:

[0071] The first one: Figure 6 As shown, the temporary fixing assembly 3 includes upper horizontal fins 18 and lower horizontal fins 19, which are respectively positioned in the middle of the sides of the lower support plate 4 and the slide rail base 2, and are of equal length. When the support device is installed, the sides of the upper and lower horizontal fins 18 and 19 are aligned, and their edges are connected and fixed by welds 20, restricting the sliding displacement of the lower support plate 4 and the slide rail base 2. After installation, the welds 20 are removed to enable relative sliding displacement of the lower support plate 4 and the slide rail base 2.

[0072] The second type: Figure 7 As shown, the temporary fixing assembly 3 includes an upper horizontal fin 18 and a lower horizontal fin 19, which are respectively positioned in the middle of the side surfaces of the lower support plate 4 and the slide rail base 2, and are of equal length. Specifically, when installed, the upper horizontal fin 18 and the lower horizontal fin 19 are fixedly connected by a plurality of bolts 21. After installation, the bolts 21 between the upper horizontal fin 18 and the lower horizontal fin 19 are removed to enable relative sliding movement between the lower support plate 4 and the slide rail base 2.

[0073] The third type: Figure 8 As shown, the temporary fixing component 3 includes: an upper horizontal fin 18 and a lower horizontal fin 19; a plurality of positioning plate slots 25 distributed in parallel are set on the upper surface of the upper horizontal fin 18; a plurality of positioning slots 24 distributed in parallel are set on the outer end surface of the lower horizontal fin 19; a rotating shaft 22 is hingedly installed on the outer side of the upper horizontal fin 18 and a plurality of strip positioning plates 23 distributed in parallel are fixedly set on the rotating shaft 22; when the rotating shaft 22 rotates, the strip positioning plate 23 can be rotated from the positioning plate slot 25 to the positioning slot 24 for engagement. When in the installed state, the strip positioning plate 23 is engaged with the positioning groove 24, combining the upper horizontal fin 18 and the lower horizontal fin 19 to limit the lower support plate 4 and the slide rail base 2; when in use, the strip positioning plate 23 is retracted into the positioning plate slot 25, and the lower support plate 4 and the slide rail base 2 are in a free sliding state; further, when in use, screw mounting holes 26 are provided on the sides of the outermost strip positioning plate 23 and the upper horizontal fin 18; and screws are installed in the screw mounting holes 26 to prevent the strip positioning plate 23 from falling off.

[0074] In this embodiment, a stainless steel plate and a polytetrafluoroethylene slide plate are provided between the upper support plate 1 and the intermediate spherical body 9, and between the intermediate spherical body 9 and the lower support plate 4, to facilitate the rotation function of the support device. A polytetrafluoroethylene slide plate and a stainless steel plate are provided between the lower support plate 4 and the slide rail base 2 to facilitate the sliding function of the support device.

[0075] Upper horizontal fins 18 are provided on both sides of the lower support plate 4 parallel to the sliding direction, and lower horizontal fins 19 are provided at corresponding positions on the slide rail base 2. The upper and lower horizontal fins 18, 19 are reliably connected (welded, bolted, or pinned, with an appropriate gap reserved between the upper and lower fins to facilitate fabrication and installation and avoid deformation interference after disconnection). This prevents deformation of the support in the sliding direction during the construction phase, but does not affect the support's rotational function during construction. After the phased construction is completed and the large-span roof is fully closed, the connection between the upper and lower horizontal fins 18, 19 is released, allowing the support to function as a sliding hinge during normal use to release stress caused by temperature deformation.

[0076] Example 2

[0077] A multi-stage buffering method for resisting transient load impact for large-span buildings, using the support device of Example 1, comprises the following steps:

[0078] Step S1: The roof and supporting columns of the building structure are affected by impact or temperature and are relatively displaced; at the same time, the upper support plate 1 is driven to be relatively displaced relative to the slide rail base 2;

[0079] Step S2: the lower support plate 4 is driven by the upper support plate 1 to slide relative to the slide rail base 2;

[0080] Step S3: When the lower support plate 4 slides relative to the slide rail base 2, the multi-stage force-bearing component 5 undergoes elastic deformation to achieve load buffering.

[0081] In this embodiment, in step S3, the stiffness K1 of the first leaf spring assembly 13 of the multi-stage force-bearing assembly 5 is relatively small, and the stiffness is approximately 1 / 10 of the lateral stiffness of the column, and the elastic deformation is Δ1; the stiffness K2 of the second leaf spring assembly 16 is approximately 1 / 5 of the lateral stiffness of the column, and the elastic deformation is Δ2; the stiffness K3 of the disc spring 14 is the same as the lateral stiffness of the column, and the elastic deformation is Δ3. The principle for determining the elastic deformation of the disc spring 14 is K3Δ3>K2Δ2, so that when the second leaf spring assembly 16 reaches the limit deformation, the disc spring 14 still has the ability to deform.

[0082] Specifically, the disc spring 14 can adopt different models, and the requirements for the stiffness and elastic deformation of the disc spring 14 can be achieved by overlapping, matching or combining multiple disc springs 14.

[0083] In this embodiment, in step S3, the deformation of the multi-stage force-bearing component 5 is divided into three stages:

[0084] In the first stage of deformation, the first leaf spring assembly 13 is compressed, and the second leaf spring assembly 16 and the disc spring 14 are not working. At this time, the displacement of the lower support plate 4 relative to the slide rail base 2 is Δ<Δ1, and the support stiffness K=K1.

[0085] In the second stage of deformation, the displacement of the lower support plate 4 relative to the slide rail base 2 is Δ>Δ1, and the first leaf spring assembly 13, the second leaf spring assembly 16 and the disc spring 14 of the multi-stage force-bearing assembly 5 are all compressed. At this time, the stiffness of the multi-stage force-bearing assembly 5 is

[0086] In the third stage of deformation, the second leaf spring assembly 16 is flattened and fits against the side of the rail base 2, and the displacement of the lower support plate 4 relative to the rail base 2 At this time, the stiffness K of the multi-stage load-bearing component 5 is K=K1+K3. Since the deformation of the disc spring 14 does not reach its elastic deformation Δ3, the impact force at the end point of the sliding stroke can be reduced under the action of a rare earthquake, thereby avoiding damage to the support.

[0087] Compared with the prior art, the technical solution provided by this embodiment has at least one of the following beneficial effects:

[0088] 1. In this embodiment, upper horizontal fins 18 and lower horizontal fins 19 are respectively provided on the side walls of the lower support plate 4 and the slide rail base 2 to connect and fix the two together, thereby forming a reliable constraint on the relative deformation between the lower support plate 4 and the slide rail base 2, thereby achieving the force condition of the fixed hinge connection between the long-span roof and the supporting column during the phased construction period; after the overall closure of the long-span roof structure is completed, the constraint between the lower support plate 4 and the slide rail base 2 is released by releasing the connection between the upper and lower fins, and the lower support plate 4 can release temperature deformation along the slide rail direction, thereby achieving the force condition of the sliding hinge connection between the long-span roof and the supporting column during normal use;

[0089] 2. In this embodiment, two sets of leaf spring assemblies are provided at the ends of the slide rail base 2, and a set of disc springs 14 is provided between the two sets of leaf spring assemblies; the first leaf spring assembly 13 has the smallest stiffness and the largest elastic deformation displacement; the second leaf spring assembly 16 has a greater stiffness than the first leaf spring assembly 13 and a smaller elastic deformation displacement; the disc spring 14 has a greater stiffness than the second leaf spring assembly 16 and the smallest elastic deformation displacement. The first leaf spring assembly 13 is used to reset deformation under the action of temperature, at which time the second leaf spring assembly 16 and the disc spring 14 have not yet taken effect; when the deformation of the support exceeds the reserved temperature deformation under the action of an earthquake, the second leaf spring assembly 16 begins to take effect. In rare earthquakes, when the deformation of the roof exceeds the elastic displacement of the leaf springs, the disc springs 14 can effectively buffer the impact force between the roof and the supporting columns, reduce the reaction force of the columns under the action of an earthquake, and reduce the lateral deformation of large-span structures.

[0090] 3. In this embodiment, the lower support plate 4 is designed to move horizontally along the slide rail base 2 to release the deformation of the extra-long span roof under the action of temperature during normal use; two sets of leaf spring assemblies with different stiffness are arranged between the end of the slide rail base 2 and the lower support plate 4, which can not only ensure that the lower support plate 4 has a reset function when the deformation is small at normal temperature, but also avoid significant collision between the lower support plate 4 and the end point of the sliding stroke when the deformation is large due to rare earthquakes, thereby avoiding damage to the supporting device.

[0091] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A supporting device for resisting instantaneous load impact for a large-span building, characterized in that: include: An upper support plate (1), a slide rail base (2), a lower support plate (4) and a multi-stage force-bearing component (5); The upper support plate (1) and the slide rail base (2) are respectively used for fixing and connecting the roof and the supporting column of the building structure; The upper support plate (1) is mounted on the outside of the lower support plate (4); the lower support plate (4) is slidably mounted above the slide rail base (2), and a multi-stage force-bearing component (5) is provided between the lower support plate (4) and the slide rail base (2); The multi-stage force-bearing component (5) comprises a first leaf spring component (13) and a second leaf spring component (16).

2. The support device for resisting instantaneous load impact for large-span buildings according to claim 1, characterized in that: The multi-stage force-bearing components (5) are symmetrically arranged in two groups along the sliding direction of the lower support plate (4) to buffer the movement impact of the lower support plate (4).

3. The support device for resisting instantaneous load impact for long-span buildings according to claim 1 or 2, characterized in that: The length of the first leaf spring assembly (13) is greater than the length of the second leaf spring assembly (16).

4. The support device for resisting instantaneous load impact for large-span buildings according to claim 3 is characterized in that: An intermediate spherical body (9) is provided between the upper support plate (1) and the lower support plate (4).

5. The support device for resisting instantaneous load impact for large-span buildings according to claim 4, characterized in that: The upper surface of the intermediate spherical body (9) is a plane.

6. The support device for resisting instantaneous load impact for a large-span building according to claim 5, characterized in that: The lower surface of the intermediate spherical body (9) is a spherical surface.

7. The support device for resisting instantaneous load impact for long-span buildings according to claim 6, characterized in that: An upper sliding surface stainless steel plate (7) and an upper sliding surface plane slide plate (8) are provided between the upper support plate (1) and the intermediate spherical body (9).

8. The support device for resisting instantaneous load impact for a large-span building according to claim 6, characterized in that: A spherical slide plate (10) is provided between the lower support plate (4) and the intermediate spherical body (9).

9. The support device for resisting instantaneous load impact for a large-span building according to claim 1, characterized in that: A lower sliding surface plane slide plate (11) and a lower sliding surface stainless steel plate (12) are provided between the lower support plate (4) and the slide rail base (2).

10. A multi-stage buffering method for resisting transient load impact for large-span buildings, characterized in that: The supporting device according to any one of claims 1 to 9 comprises the following steps: Step S1: The roof and supporting columns of the building structure are subjected to relative displacement due to impact or temperature; at the same time, the upper support plate (1) is driven to move relative to the slide rail base (2); Step S2: the lower support plate (4) is driven by the upper support plate (1) to slide relative to the slide rail base (2); Step S3: When the lower support plate (4) slides relative to the slide rail base (2), the multi-stage force-bearing component (5) undergoes elastic deformation to achieve load buffering.

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