CN109487914B - Annular composite viscoelastic damping support - Google Patents
Annular composite viscoelastic damping support Download PDFInfo
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- CN109487914B CN109487914B CN201910016033.8A CN201910016033A CN109487914B CN 109487914 B CN109487914 B CN 109487914B CN 201910016033 A CN201910016033 A CN 201910016033A CN 109487914 B CN109487914 B CN 109487914B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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Abstract
The invention discloses an annular composite viscoelastic damping support, which is characterized in that the safety performance of a large-span space structure under the action of earthquake and strong wind is improved through extrusion and shearing plastic deformation of a lead core in the support and shearing hysteresis deformation energy consumption of a viscoelastic material. Meanwhile, the polytetrafluoroethylene backing plate can effectively reduce sliding friction force between the round support base plate and the vertical component, and can fully play the energy consumption performance of the composite viscoelastic material and the lead core in the damping support, so that the damping and energy consumption effects of the annular composite viscoelastic damping support under the earthquake effect are realized. The annular composite viscoelastic damping support simultaneously adopts three energy consumption materials of soft steel, rubber and lead and two energy consumption mechanisms of shearing energy consumption and extrusion energy consumption, and the annular composite viscoelastic damping support is used as an effective passive control damping device, can be used for wind resistance and vibration resistance of a structure, can be used in vibration resistance and vibration reduction of the structure, and is a damping energy consumption support with strong energy consumption capability, good damping characteristic and high stability.
Description
Technical Field
The invention belongs to the technical field of building structures, relates to a steel structure building connection node, and in particular relates to an annular composite viscoelastic damping support for connecting a space roof and a vertical bearing structure in a large-span space structure.
Background
With the development of the times, the living standard of people is gradually improved, and the living conditions and living environment are correspondingly changed. The wide-span space reticulated shell structure is widely applied at home and abroad and is increasingly valued by architects.
The span of the reticulated shell structure is larger and larger, the dead weight of the roof is inevitably increased along with the increase of the span, and the problem encountered in the design of the curved surface reticulated shell structure is that the large-span curved surface structure has large horizontal thrust, and the lower structure is often difficult to bear.
A large number of earthquake damage researches show that by adopting a reasonable support form, the earthquake response of the large-span space reticulated shell structure can be obviously reduced, and the damage and the destruction of the structure are reduced. The support with excellent performance allows certain linear displacement, angular displacement or both to relieve huge horizontal thrust, reduce adverse effects on the lower structure and reduce engineering cost. Therefore, the composite viscoelastic material and the lead core are adopted as the optimal materials for damping and dissipating energy, so that part of earthquake energy can be absorbed, the earthquake response of the structure is reduced, and the structure has larger elastic deformation in the horizontal direction.
Along with the continuous deep research of the damping support, the damping support is applied to large-span structures such as a net rack, a membrane structure and a dome, the damping support is researched and designed from the anti-seismic angle of the structure, and the anti-seismic energy consumption performance of the damping support is considered, so that the design of a structure with reasonable space stress is imperative.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an annular composite viscoelastic damping mount for connecting a space roof with a vertical load bearing structure in a large span space structure, comprising:
an annular steel member having an annular groove structure with an opening on a side surface; a plurality of through holes I are uniformly formed in the top plate of the annular steel piece, and a plurality of positioning grooves opposite to the through holes I are formed in the bottom plate; the annular steel piece is formed by welding two semi-annular steel pieces;
the double-layer annular composite viscoelastic material layers are respectively arranged above and below the inside of the annular groove structure of the annular steel piece; the double-layer annular composite viscoelastic material layer is provided with a plurality of through holes II corresponding to the plurality of through holes I;
the annular shear steel plate is arranged in the middle of the annular groove structure of the annular steel piece and is positioned between the double-layer annular composite viscoelastic material layers; the annular shear steel plate is provided with a plurality of through holes III corresponding to the plurality of through holes I;
the lead cores are respectively penetrated into the through holes I, the through holes II, the through holes III and the positioning grooves; sealing fasteners are arranged at the tops of the through holes I;
the support base plate is arranged in the middle of the annular steel piece, and the side surface of the support base plate is fixedly connected with the protruding end of the annular shearing steel plate; the upper part of the support base plate is connected with support rib plates which are arranged in a cross shape, and the upper part of the support rib plates is connected with hollow steel balls;
the annular steel piece is detachably connected with a vertical supporting member of the vertical bearing structure, and the surface of the hollow steel ball is connected with a rod piece of the space roof structure; a polytetrafluoroethylene backing plate is arranged between the support base plate positioned in the middle of the annular steel piece and the vertical supporting member; the annular steel piece, the double-layer annular composite viscoelastic material layer, the annular shearing steel plate and the plurality of lead cores are matched and meshed with each other to be connected with the support base plate to form an integral force transmission component.
Preferably, the annular steel member is a circular annular steel member; the support base plate is a round support base plate; the double-layer annular composite viscoelastic material layer is a double-layer annular composite viscoelastic material layer; the annular shear steel plate is a circular annular shear steel plate.
Preferably, the diameter of the circular support bottom plate is 50-100 mm smaller than the inner diameter of the circular steel member; the thickness of the circular shearing steel plate is 10-20 mm, and the distance between the circular shearing steel plate and the top of the circular support base plate is 20-40 mm.
Preferably, the annular steel member is a square annular steel member; the support base plate is a square support base plate; the double-layer annular composite viscoelastic material layer is a double-layer square annular composite viscoelastic material layer; the annular shear steel plate is a square annular shear steel plate.
Preferably, the side length of the square support bottom plate is 50-100 mm smaller than that of the annular steel piece; the thickness of the square annular shearing steel plate is 10-20 mm, and the distance between the square annular shearing steel plate and the top of the square support bottom plate is 20-40 mm.
Preferably, the detachable connection mode of the annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: the annular steel part fixing device is characterized in that an annular connecting plate is reserved at the bottom of the outer side of the annular steel part, a plurality of bolt holes I are formed in the annular connecting plate, a plurality of embedded rod pieces I are arranged at the top end of the vertical supporting member, and the plurality of bolt holes I are respectively inserted into the plurality of embedded rod pieces I and then fix the annular steel part with the vertical supporting member through anchor bolts I.
Preferably, the detachable connection mode of the annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: the top end of the vertical supporting member is provided with an embedded steel plate and a plurality of embedded rod pieces II; the embedded steel plate is welded with the bottom of the annular steel piece; the support base plate is provided with a plurality of bolt holes II, and the annular steel piece and the vertical supporting member are fixed through the anchor bolts II after the plurality of bolt holes II are respectively inserted into the plurality of embedded rod pieces II; the polytetrafluoroethylene backing plate is arranged between the support base plate and the embedded steel plate; the polytetrafluoroethylene backing plate is adhered to the top of the embedded steel plate by epoxy resin, and the thickness of the polytetrafluoroethylene backing plate is 5mm.
Preferably, the polytetrafluoroethylene backing plate is adhered to the top of the vertical supporting member of the vertical bearing member by adopting epoxy resin, and the thickness of the polytetrafluoroethylene backing plate is 5mm; the radius of the sector notch of the support rib plate is identical with the outer diameter of the hollow steel ball; the double-layer annular composite viscoelastic material layer is formed by alternately overlapping a thin steel plate made of mild steel and a rubber layer and then forming a whole with annular steel pieces and annular shearing steel plates through high-temperature high-pressure vulcanization; the rubber layer in the double-layer annular composite viscoelastic material layer is positioned on the outer side, namely the rubber layer forming the double-layer annular composite viscoelastic material layer is one layer more than the thin steel plate; the depth of the plurality of positioning grooves is 5mm; the diameter of the lead core is 15-50 mm; the height of the sealing fastener is flush with the top of the annular steel piece, and the diameter of the sealing fastener is 4mm larger than that of the lead core.
Preferably, a plurality of vertical radial holes communicated with the plurality of through holes II are formed in the double-layer annular composite viscoelastic material layer.
The invention also provides an installation method of the annular composite viscoelastic damping support, which comprises the following steps:
placing a double-layer annular composite viscoelastic material layer above and below the annular groove structure of an annular steel piece formed by two semi-annular steel pieces, placing an annular shearing steel plate between the double-layer annular composite viscoelastic material layers, aligning a plurality of through holes I, a plurality of positioning grooves, a plurality of through holes II and a plurality of through holes III, welding the two semi-annular steel pieces to form a closed annular steel piece, and vulcanizing the closed annular steel piece into a whole under vulcanization conditions of 150-230 ℃ and 10-15 MPa;
adhering a polytetrafluoroethylene backing plate to the top of a vertical supporting member of the vertical bearing member by using epoxy resin, and detachably connecting the integrated annular steel piece obtained in the first vulcanization step to the vertical supporting member, wherein the polytetrafluoroethylene backing plate is positioned in the middle of the annular steel piece; lead is poured from the top of the through holes I and sequentially enters the through holes II, the through holes III and the positioning grooves to form lead cores bearing extrusion and shearing actions, and the upper ends of the through holes I are sealed by sealing fasteners;
placing the support base plate above the polytetrafluoroethylene backing plate, enabling the support base plate to be located in the middle of the annular steel piece, and then welding and connecting the side face of the support base plate with the protruding end of the annular shearing steel plate; simultaneously welding a support rib plate which is arranged in a cross shape above the support bottom plate, and welding a hollow steel ball above the support rib plate; the surface of the hollow steel ball is connected with a rod piece of the space roof structure to form an annular composite viscoelastic damping support for connecting the space roof and the vertical bearing structure in the large-span space structure. .
The invention at least comprises the following beneficial effects:
(1) The annular composite viscoelastic damping support reduces the earthquake response of the structure to the maximum extent. (2) The damping material adopted by the invention is convenient to obtain, and the lead core, the mild steel plate and the viscoelasticity material (rubber) which form the damper are all common energy-consuming materials, so that the cost is low. (3) The invention is easy for standardized production, has simple manufacturing process and working procedure, can adapt to the requirements of different performances by adjusting the diameter and the number of the lead cores under the same size specification, reduces the production specification and improves the production efficiency. (4) The annular composite viscoelastic damping support simultaneously utilizes three energy consumption materials of rubber, mild steel and lead and two different energy consumption mechanisms of shearing energy consumption and extrusion energy consumption. (5) The application range is wide, the adaptability is strong, and the anti-seismic cable can be used for the anti-seismic of engineering structures and also can be used for wind resistance of the engineering structures.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is a schematic cross-sectional elevation view of an annular composite viscoelastic damping mount of the present invention;
FIG. 2 is a schematic diagram of the frontal structure of the annular composite viscoelastic damping mount of the present invention (no lead);
FIG. 3 is a schematic structural view of a dual layer annular composite viscoelastic material layer of the present invention;
FIG. 4 is a schematic top view of an annular composite viscoelastic damping mount (annular) of the present invention;
FIG. 5 is a schematic top view of an annular composite viscoelastic damping mount (square annular shape) of the present invention;
FIG. 6 is a schematic cross-sectional elevation view of an annular composite viscoelastic damping mount of another construction of the present invention;
FIG. 7 is a schematic top view of an annular composite viscoelastic damping mount (annular) of another construction of the present invention;
FIG. 8 is a schematic top view of an annular composite viscoelastic damping mount (square annular shape) of the present invention;
FIG. 9 is a schematic front cross-sectional view of an annular composite viscoelastic damping mount of another construction of the invention (no lead);
FIG. 10 is a schematic cross-sectional elevation view of an annular composite viscoelastic damping mount of another construction of the present invention;
FIG. 11 is a schematic cross-sectional elevation view of an annular composite viscoelastic damping mount of another construction of the present invention (no lead);
FIG. 12 is a schematic cross-sectional elevation view of an annular composite viscoelastic damping mount of another construction of the present invention.
The specific embodiment is as follows:
the present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Figures 1-2, 6 illustrate an annular composite viscoelastic damping mount of the present invention for connecting a space roof to a vertical load-bearing structure in a large span space structure, comprising:
an annular steel member 8 having an annular groove structure 81 open on the side; a plurality of through holes i 83 are uniformly formed in the top plate 82 of the annular steel member 8, and a plurality of positioning grooves 85 opposite to the plurality of through holes i 83 are formed in the bottom plate 84; the annular steel piece 8 is formed by welding two semi-annular steel pieces 86;
a double-layer annular composite viscoelastic material layer 3 which is respectively arranged above and below the inside of the annular groove structure of the annular steel piece; the double-layer annular composite viscoelastic material layer 3 is provided with a plurality of through holes II 31 corresponding to the plurality of through holes I83;
an annular shear steel plate 5 disposed in the middle of the annular groove structure 81 of the annular steel member 8 and between the double-layer annular composite viscoelastic material layers 3; the annular shear steel plate 5 is provided with a plurality of through holes III 51 corresponding to the plurality of through holes I83;
a plurality of lead cores 4 respectively penetrating through the plurality of through holes i 83, the plurality of through holes ii 31, the plurality of through holes iii 51, and the plurality of positioning grooves 85; and sealing fasteners 7 are arranged at the tops of the through holes I83;
the support base plate 6 is arranged in the middle of the annular steel piece 8, and the side surface of the support base plate 6 is fixedly connected with the protruding end of the annular shear steel plate 5; the upper part of the support base plate 6 is connected with a support rib plate 2 which is arranged in a cross shape, and the upper part of the support rib plate 2 is connected with a hollow steel ball 1;
the annular steel piece 8 is detachably connected with a vertical supporting member 12 of a vertical bearing structure, and the surface of the hollow steel ball 1 is connected with a rod piece of a space roof structure; a polytetrafluoroethylene backing plate 11 is arranged between the support base plate 6 positioned in the middle of the annular steel piece 8 and the vertical supporting member 12; the annular steel piece 8, the double-layer annular composite viscoelastic material layer 3, the annular shearing steel plate 5 and the plurality of lead cores 4 are matched and meshed with the support base plate 6 to be connected into an integral force transmission component.
In the technical scheme, the energy consumption of extrusion and shearing plastic deformation of the lead core 4 and shearing hysteresis deformation of the double-layer annular composite viscoelastic material layer 3 in the annular composite viscoelastic damping support is utilized, so that the safety performance of a large-span space structure under the action of earthquakes and strong winds is improved, meanwhile, the sliding friction force between the circular support bottom plate 6 and the vertical member 12 can be effectively reduced due to the polytetrafluoroethylene backing plate 11, the energy consumption performance of the double-layer annular composite viscoelastic material layer 3 and the lead core 4 in the damping support can be fully exerted, and the damping energy consumption effect of the annular composite viscoelastic damping support under the action of earthquakes is realized.
The annular composite viscoelastic damping support is used as an effective passive control damping device in a large-span space structure, can be used for wind resistance and vibration resistance of the structure, can be used in vibration resistance and vibration reduction of the structure, and is a damping energy consumption support with strong energy consumption capability, good damping characteristic and high stability. Meanwhile, the lead core and the double-layer annular composite viscoelastic material layer used in the annular composite viscoelastic damping support are all common damping energy consumption materials, the materials are convenient to obtain, the price is low, and the construction cost of an engineering structure can be reduced.
In the above technical solution, as shown in fig. 4 and 7, the annular steel member is a circular annular steel member; the support base plate is a round support base plate; the double-layer annular composite viscoelastic material layer is a double-layer annular composite viscoelastic material layer; the annular shearing steel plate is a circular shearing steel plate, by adopting the technical scheme, the circular shape is symmetrical about any angle of the center, the stress analysis results of horizontal forces at different angles are consistent, and the circular shape is more favorable for fully playing the energy consumption performance of the damping support due to the uncertainty of the action direction of horizontal seismic forces.
In the technical scheme, the diameter of the circular support base plate is 50-100 mm smaller than the inner diameter of the circular steel piece, and by adopting the parameter, rigid contact between the support base plate and the circular steel piece is avoided when horizontal displacement occurs, and a gap is reserved in the middle to ensure deformation energy consumption of the damping material; the thickness of the circular shearing steel plate is 10-20 mm, the distance between the circular shearing steel plate and the top of the circular support base plate is 20-40 mm, and by adopting the parameter, the distance between the shearing steel plate and the top of the circular support base plate is the total thickness of the composite viscoelastic material, so that the support is ensured to consume energy fully under the action of earthquake force.
In the above technical solution, as shown in fig. 5 and 8, the annular steel member is a square annular steel member; the support base plate is a square support base plate; the double-layer annular composite viscoelastic material layer is a double-layer square annular composite viscoelastic material layer; the annular shear steel plate is a square annular shear steel plate.
In the technical scheme, the side length of the square support bottom plate is 50-100 mm smaller than that of the annular steel piece, the parameter is adopted, rigid contact between the support bottom plate and the annular steel piece is avoided when horizontal displacement occurs, and a gap is reserved in the middle to ensure deformation energy consumption of the damping material; the thickness of the square annular shearing steel plate is 10-20 mm, the distance between the square annular shearing steel plate and the top of the bottom plate of the square support is 20-40 mm, and by adopting the parameter, the distance between the shearing steel plate and the top of the bottom plate of the round support is the total thickness of the composite viscoelastic material, so that the support is ensured to consume energy fully under the action of earthquake force.
In the above technical solution, as shown in fig. 1,2,4,5, the detachable connection manner of the annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: the annular connecting plate 87 is reserved at the bottom of the outer side of the annular steel piece 8, a plurality of bolt holes I88 are formed in the annular connecting plate 87, a plurality of embedded rod pieces I10 are arranged at the top end of the vertical supporting member, and the annular steel piece 8 and the vertical supporting member 12 are fixed through anchor bolts I9 after the plurality of bolt holes I88 are respectively inserted into the plurality of embedded rod pieces I10.
In the above technical solution, as shown in fig. 6,7 and 8, the detachable connection manner of the annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: the top end of the vertical supporting member 12 is provided with an embedded steel plate 14 and a plurality of embedded rod pieces II 121; the embedded steel plate is welded with the bottom of the annular steel piece; the support base plate is provided with a plurality of bolt holes II 13, the plurality of bolt holes II 13 are respectively inserted into a plurality of embedded rod pieces II 121 and then fix the annular steel piece 8 with the vertical supporting member 12 through an anchor bolt II 122, and a bolt hole shearing plate 15 is sleeved between the embedded rod pieces II 121 and the anchor bolt II 122; the polytetrafluoroethylene backing plate 11 is arranged between the support base plate 6 and the embedded steel plate 14; the polytetrafluoroethylene backing plate 11 is adhered to the top of the embedded steel plate 14 by adopting epoxy resin, and the thickness of the polytetrafluoroethylene backing plate is 5mm; as shown in the figure, the shape of the embedded steel plate is square embedded steel plate or round embedded steel plate, and the square embedded steel plate or round embedded steel plate is adopted depending on whether the support base plate is a square support base plate or a round support base plate.
In the above technical solution, the polytetrafluoroethylene liner 11 is adhered to the top of the vertical supporting member of the vertical bearing member by using epoxy resin, and the thickness of the polytetrafluoroethylene liner is 5mm; the radius of the sector notch of the support rib plate 2 is matched with the outer diameter of the hollow steel ball; as shown in fig. 3, the double-layer annular composite viscoelastic material layer 3 is formed by alternately laminating a thin steel plate 32 made of mild steel and a rubber layer 33, and then forming a whole with the annular steel member 8 and the annular shear steel plate 5 through high-temperature high-pressure vulcanization. The rubber layer in the double-layer annular composite viscoelastic material layer is positioned at the outer side, namely the rubber layer forming the double-layer annular composite viscoelastic material layer is one layer more than the thin steel plate, and the upper side and the lower side of the composite viscoelastic material are ensured to be rubber by adopting the mode, and the rubber is bonded with the outer annular steel piece and the shearing steel plate through high-temperature high-pressure vulcanization; the depth of the plurality of positioning grooves is 5mm; the diameter of the lead core is 15-50 mm; the height of the sealing fastener is flush with the top of the annular steel piece, the diameter of the sealing fastener is 4mm larger than that of the lead core, and in this way, the lead core can be effectively sealed.
In the above technical solution, as shown in fig. 9 to 12, the double-layer annular composite viscoelastic material layer is provided with a plurality of radial holes which are communicated with and perpendicular to the plurality of through holes ii 31, and the plurality of radial holes are strip-shaped radial holes 34 or S-shaped radial holes 35.
Example 1:
the installation method of the annular composite viscoelastic damping support comprises the following steps:
placing a double-layer annular composite viscoelastic material layer above and below the annular groove structure of an annular steel piece formed by two semicircular steel pieces, placing an annular shearing steel plate between the double-layer annular composite viscoelastic material layer, aligning a plurality of through holes I, a plurality of positioning grooves, a plurality of through holes II and a plurality of through holes III, welding the two semicircular steel pieces to form a closed annular steel piece, and vulcanizing the closed annular steel piece into a whole under vulcanization conditions of 180 ℃ and 12 MPa;
adhering a polytetrafluoroethylene backing plate to the top of a vertical supporting member of the vertical bearing member by using epoxy resin, and detachably connecting the integrated annular steel piece obtained in the first vulcanization step to the vertical supporting member, wherein the polytetrafluoroethylene backing plate is positioned in the middle of the annular steel piece; lead is poured from the top of the through holes I and sequentially enters the through holes II, the through holes III and the positioning grooves to form lead cores bearing extrusion and shearing actions, and the upper ends of the through holes I are sealed by sealing fasteners; the detachable connection mode of the annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: an annular connecting plate is reserved at the bottom of the outer side of the annular steel piece, a plurality of bolt holes I are formed in the annular connecting plate, a plurality of embedded rod pieces I are arranged at the top end of the vertical supporting member, and the annular steel piece and the vertical supporting member are fixed through anchor bolts I after the plurality of bolt holes I are respectively inserted into the plurality of embedded rod pieces I; the thickness of the polytetrafluoroethylene backing plate is 5mm;
placing the circular support base plate above the polytetrafluoroethylene backing plate, enabling the circular support base plate to be located in the middle of the circular steel piece, and then welding and connecting the side face of the circular support base plate with the protruding end of the circular shearing steel plate; simultaneously welding a support rib plate which is arranged in a cross shape above the round support bottom plate, and welding a hollow steel ball above the support rib plate; the surface of the hollow steel ball is connected with a rod piece of the space roof structure to form an annular composite viscoelastic damping support for connecting the space roof and the vertical bearing structure in the large-span space structure.
Example 2:
the installation method of the annular composite viscoelastic damping support comprises the following steps:
placing a double-layer annular composite viscoelastic material layer above and below the annular groove structure of a square annular steel piece formed by two half square annular steel pieces, placing a square annular shearing steel plate between the double-layer square annular composite viscoelastic material layer, aligning a plurality of through holes I, a plurality of positioning grooves, a plurality of through holes II and a plurality of through holes III, welding the two half square annular steel pieces to form a closed square annular steel piece, and vulcanizing the closed square annular steel piece into a whole under the vulcanization condition of 175 ℃ and 10 MPa;
adhering a polytetrafluoroethylene backing plate to a square pre-embedded steel plate of a vertical supporting member of a vertical bearing member by using epoxy resin, and detachably connecting the integrated square annular steel piece obtained in the first vulcanization step to the vertical supporting member, wherein the polytetrafluoroethylene backing plate is positioned in the middle of the square annular steel piece; lead is poured from the top of the through holes I and sequentially enters the through holes II, the through holes III and the positioning grooves to form lead cores bearing extrusion and shearing actions, and the upper ends of the through holes I are sealed by sealing fasteners; the detachable connection mode of the square annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: the top end of the vertical supporting member is provided with a square embedded steel plate and a plurality of embedded rod pieces II; the square embedded steel plate is welded with the bottom of the square annular steel piece; the support base plate is provided with a plurality of bolt holes II, and the square annular steel piece and the vertical supporting member are fixed through the anchor bolts II after the bolt holes II are respectively inserted into the embedded rod pieces II; the polytetrafluoroethylene backing plate is arranged between the square support base plate and the square embedded steel plate; the thickness of the polytetrafluoroethylene backing plate is 5mm;
placing the square support bottom plate above the polytetrafluoroethylene backing plate, enabling the square support bottom plate to be located in the middle of the square annular steel piece, and then welding and connecting the side face of the square support bottom plate with the protruding end of the square annular shearing steel plate; simultaneously welding a support rib plate which is arranged in a cross shape above the square support bottom plate, and welding a hollow steel ball above the support rib plate; the surface of the hollow steel ball is connected with a rod piece of the space roof structure to form an annular composite viscoelastic damping support for connecting the space roof and the vertical bearing structure in the large-span space structure.
Example 3:
the installation method of the annular composite viscoelastic damping support comprises the following steps:
placing a double-layer annular composite viscoelastic material layer above and below the annular groove structure of an annular steel piece formed by two semicircular steel pieces, placing an annular shearing steel plate between the double-layer annular composite viscoelastic material layer, aligning a plurality of through holes I, a plurality of positioning grooves, a plurality of through holes II and a plurality of through holes III, welding the two semicircular steel pieces to form a closed annular steel piece, and vulcanizing the closed annular steel piece into a whole under the vulcanization condition of 185 ℃ and 11 MPa;
adhering a polytetrafluoroethylene backing plate to the top of a vertical supporting member of the vertical bearing member by using epoxy resin, and detachably connecting the integrated annular steel piece obtained in the first vulcanization step to the vertical supporting member, wherein the polytetrafluoroethylene backing plate is positioned in the middle of the annular steel piece; lead is poured from the top of a plurality of through holes I and sequentially enters a plurality of through holes II, a plurality of radial holes, a plurality of through holes III and a plurality of positioning grooves to form a lead core bearing extrusion and shearing actions, and the upper ends of the plurality of through holes I are sealed by sealing fasteners; the detachable connection mode of the annular steel piece and the vertical supporting member of the vertical bearing structure is as follows: an annular connecting plate is reserved at the bottom of the outer side of the annular steel piece, a plurality of bolt holes I are formed in the annular connecting plate, a plurality of embedded rod pieces I are arranged at the top end of the vertical supporting member, and the annular steel piece and the vertical supporting member are fixed through anchor bolts I after the plurality of bolt holes I are respectively inserted into the plurality of embedded rod pieces I; the thickness of the polytetrafluoroethylene backing plate is 5mm;
placing the circular support base plate above the polytetrafluoroethylene backing plate, enabling the circular support base plate to be located in the middle of the circular steel piece, and then welding and connecting the side face of the circular support base plate with the protruding end of the circular shearing steel plate; simultaneously welding a support rib plate which is arranged in a cross shape above the round support bottom plate, and welding a hollow steel ball above the support rib plate; the surface of the hollow steel ball is connected with a rod piece of the space roof structure to form an annular composite viscoelastic damping support for connecting the space roof and the vertical bearing structure in the large-span space structure.
In the large-span space structure building, the annular composite viscoelastic damping support is used for connecting the roof structure and the vertical bearing structure, and the safety performance of the large-span space structure under the action of earthquake and strong wind is improved through extrusion and shearing plastic deformation of a lead core in the support and shearing hysteresis deformation energy consumption of a viscoelastic material. Meanwhile, the polytetrafluoroethylene backing plate can effectively reduce sliding friction force between the round support base plate and the vertical member, and can fully exert the energy consumption performance of the composite viscoelastic material and the lead core in the damping support, so that the damping and energy consumption effects of the annular composite viscoelastic damping support under the earthquake effect are realized. Compared with the existing support, the annular composite viscoelastic damping support simultaneously adopts three energy consumption materials of soft steel, rubber and lead and two energy consumption mechanisms of shearing energy consumption and extrusion energy consumption, and the annular composite viscoelastic damping support is used as an effective passive control damping device, can be used for wind resistance and vibration resistance of a structure, can be used in vibration resistance and damping of the structure, and is a damping energy consumption support with strong energy consumption capability, good damping characteristic and high stability.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. An annular composite viscoelastic damping support for connecting a space roof and a vertical load-bearing structure in a large-span space structure, comprising:
an annular steel member having an annular groove structure with an opening on a side surface; a plurality of through holes I are uniformly formed in the top plate of the annular steel piece, and a plurality of positioning grooves opposite to the through holes I are formed in the bottom plate; the annular steel piece is formed by welding two semi-annular steel pieces;
the double-layer annular composite viscoelastic material layers are respectively arranged above and below the inside of the annular groove structure of the annular steel piece; the double-layer annular composite viscoelastic material layer is provided with a plurality of through holes II corresponding to the plurality of through holes I;
the annular shear steel plate is arranged in the middle of the annular groove structure of the annular steel piece and is positioned between the double-layer annular composite viscoelastic material layers; the annular shear steel plate is provided with a plurality of through holes III corresponding to the plurality of through holes I;
the lead cores are respectively penetrated into the through holes I, the through holes II, the through holes III and the positioning grooves; sealing fasteners are arranged at the tops of the through holes I;
the support base plate is arranged in the middle of the annular steel piece, and the side surface of the support base plate is fixedly connected with the protruding end of the annular shearing steel plate; the upper part of the support base plate is connected with support rib plates which are arranged in a cross shape, and the upper part of the support rib plates is connected with hollow steel balls;
the annular steel piece is detachably connected with a vertical supporting member of the vertical bearing structure, and the surface of the hollow steel ball is connected with a rod piece of the space roof structure; a polytetrafluoroethylene backing plate is arranged between the support base plate positioned in the middle of the annular steel piece and the vertical supporting member; the annular steel piece, the double-layer annular composite viscoelastic material layer, the annular shearing steel plate and the plurality of lead cores are matched and meshed with each other to be connected with the support base plate to form an integral force transmission component;
the polytetrafluoroethylene backing plate is adhered to the top of the vertical supporting member of the vertical bearing member by adopting epoxy resin, and the thickness of the polytetrafluoroethylene backing plate is 5mm; the radius of the sector notch of the support rib plate is identical with the outer diameter of the hollow steel ball; the double-layer annular composite viscoelastic material layer is formed by alternately overlapping a thin steel plate made of mild steel and a rubber layer and then forming a whole with annular steel pieces and annular shearing steel plates through high-temperature high-pressure vulcanization; the rubber layer in the double-layer annular composite viscoelastic material layer is positioned on the outer side, namely the rubber layer forming the double-layer annular composite viscoelastic material layer is one layer more than the thin steel plate; the depth of the plurality of positioning grooves is 5mm; the diameter of the lead core is 15-50 mm; the height of the sealing fastener is flush with the top of the annular steel piece, and the diameter of the sealing fastener is 4mm larger than that of the lead core;
the double-layer annular composite viscoelastic material layer is provided with a plurality of radial holes which are communicated with and vertical to the plurality of through holes II.
2. The annular composite viscoelastic damping mount of claim 1, wherein the annular steel member is a circular annular steel member; the support base plate is a round support base plate; the double-layer annular composite viscoelastic material layer is a double-layer annular composite viscoelastic material layer; the annular shear steel plate is a circular annular shear steel plate.
3. The annular composite viscoelastic damping support of claim 2, wherein the diameter of the circular support base plate is 50-100 mm smaller than the inner diameter of the circular steel member; the thickness of the annular shearing steel plate is 10-20 mm, and the distance between the annular shearing steel plate and the top of the circular support base plate is 20-40 mm.
4. The annular composite viscoelastic damping mount of claim 1, wherein the annular steel member is a square annular steel member; the support base plate is a square support base plate; the double-layer annular composite viscoelastic material layer is a double-layer square annular composite viscoelastic material layer; the annular shear steel plate is a square annular shear steel plate.
5. The annular composite viscoelastic damping support according to claim 4, wherein the side length of the square support bottom plate is 50-100 mm smaller than the side length of an annular steel piece; the thickness of the square annular shearing steel plate is 10-20 mm, and the distance between the square annular shearing steel plate and the top of the square support bottom plate is 20-40 mm.
6. The annular composite viscoelastic damping mount of claim 1, wherein the annular steel is detachably connected to the vertical support member of the vertical load bearing structure by: the annular steel part fixing device is characterized in that an annular connecting plate is reserved at the bottom of the outer side of the annular steel part, a plurality of bolt holes I are formed in the annular connecting plate, a plurality of embedded rod pieces I are arranged at the top end of the vertical supporting member, and the plurality of bolt holes I are respectively inserted into the plurality of embedded rod pieces I and then fix the annular steel part with the vertical supporting member through anchor bolts I.
7. The annular composite viscoelastic damping mount of claim 1, wherein the annular steel is detachably connected to the vertical support member of the vertical load bearing structure by: the top end of the vertical supporting member is provided with an embedded steel plate and a plurality of embedded rod pieces II; the embedded steel plate is welded with the bottom of the annular steel piece; the support base plate is provided with a plurality of bolt holes II, and the annular steel piece and the vertical supporting member are fixed through the anchor bolts II after the plurality of bolt holes II are respectively inserted into the plurality of embedded rod pieces II; the polytetrafluoroethylene backing plate is arranged between the support base plate and the embedded steel plate; the polytetrafluoroethylene backing plate is adhered to the top of the embedded steel plate by epoxy resin, and the thickness of the polytetrafluoroethylene backing plate is 5mm.
8. A method of installing an annular composite viscoelastic damping mount as claimed in any one of claims 1 to 7 comprising the steps of:
placing a double-layer annular composite viscoelastic material layer above and below the annular groove structure of an annular steel piece formed by two semi-annular steel pieces, placing an annular shearing steel plate between the double-layer annular composite viscoelastic material layers, aligning a plurality of through holes I, a plurality of positioning grooves, a plurality of through holes II and a plurality of through holes III, welding the two semi-annular steel pieces to form a closed annular steel piece, and vulcanizing the closed annular steel piece into a whole under vulcanization conditions of 150-230 ℃ and 10-15 MPa;
adhering a polytetrafluoroethylene backing plate to the top of a vertical supporting member of the vertical bearing member by using epoxy resin, and detachably connecting the integrated annular steel piece obtained in the first vulcanization step to the vertical supporting member, wherein the polytetrafluoroethylene backing plate is positioned in the middle of the annular steel piece; lead is poured from the top of the through holes I and sequentially enters the through holes II, the through holes III and the positioning grooves to form lead cores bearing extrusion and shearing actions, and the upper ends of the through holes I are sealed by sealing fasteners;
placing the support base plate above the polytetrafluoroethylene backing plate, enabling the support base plate to be located in the middle of the annular steel piece, and then welding and connecting the side face of the support base plate with the protruding end of the annular shearing steel plate; simultaneously welding a support rib plate which is arranged in a cross shape above the support bottom plate, and welding a hollow steel ball above the support rib plate; the surface of the hollow steel ball is connected with a rod piece of the space roof structure to form an annular composite viscoelastic damping support for connecting the space roof and the vertical bearing structure in the large-span space structure.
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| CN201910016033.8A CN109487914B (en) | 2019-01-08 | 2019-01-08 | Annular composite viscoelastic damping support |
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| CN201910016033.8A CN109487914B (en) | 2019-01-08 | 2019-01-08 | Annular composite viscoelastic damping support |
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