CN112746683A - Threaded sleeve type stretching friction energy dissipater and using method thereof - Google Patents
Threaded sleeve type stretching friction energy dissipater and using method thereof Download PDFInfo
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- CN112746683A CN112746683A CN202110001835.9A CN202110001835A CN112746683A CN 112746683 A CN112746683 A CN 112746683A CN 202110001835 A CN202110001835 A CN 202110001835A CN 112746683 A CN112746683 A CN 112746683A
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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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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- 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
- E04H9/025—Structures with concrete columns
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Abstract
A threaded sleeve type stretching friction energy dissipater is formed by assembling two cylindrical sleeves, a cylindrical friction screw, two anti-rotation torsion springs and two limiting screws. The two ends of the inner wall of the sleeve are respectively provided with a section of friction inner wire and a section of tail inner wire, and the wall of the sleeve is also provided with a plurality of rotation-resisting screw holes. The friction screw rod body is symmetrically provided with two sections of friction external threads and two sections of sleeve spring thin sections, and each section of sleeve spring thin section is provided with a rod body small hole. The sleeve and the friction screw are connected through mutual meshing of the friction inner wire and the friction outer wire; the anti-rotation torsion spring is sleeved on the thin section of the sleeve spring, and two ends of the anti-rotation torsion spring are respectively fixed on the small hole of the rod body and the small hole of the cylinder wall. When the two ends of the energy dissipater are subjected to large tensile force, energy dissipation can be realized by means of relative rotation friction resistance between the friction outer wire and the friction inner wire, and automatic reset is completed by the restoring force of the anti-rotation torsion spring. The invention has simple structure, simple and convenient control, convenient application and wide application range, and can realize the one-way friction energy consumption and automatic reset under tension.
Description
Technical Field
The invention relates to a method for using a friction energy dissipater, in particular to a method for using a threaded sleeve type stretching friction energy dissipater, which is suitable for the technical field of constructional engineering.
Background
Earthquake disasters are one of the main disasters faced by civil engineering structures, and currently, one main technical path for reducing the earthquake damage of the structures adopts an energy-consuming and shock-absorbing technology. The energy dissipation and shock absorption technology of the structure has been developed for decades, and the main technical idea is to arrange ductile energy dissipation steel bars or section steel, friction energy dissipators, viscous dampers, viscoelastic dampers and the like at appropriate positions of the structure. Wherein, the viscous damper and the viscoelastic damper have higher manufacturing cost, larger control difficulty of long-term performance and relatively smaller application range.
The ductile energy dissipation steel bar or section steel is mainly used for an energy dissipation scheme of a concrete structure, the scheme is to dissipate earthquake energy by utilizing plastic yield of the steel bar or section steel in the heavy earthquake, and the defects that the energy dissipation capability is gradually degraded due to cold hardening of the steel bar or section steel in an energy dissipation process, and the steel bar or section steel is irreversibly and seriously damaged to cause failure of the whole structure are overcome.
The friction energy dissipater converts mechanical energy input by earthquake into heat energy by using the friction of materials, and the energy dissipation scheme has the advantages of simple structure, low manufacturing cost, good energy dissipation effect, slight damage to energy dissipation devices (basically no influence on continuous use) and high cost performance. The main forms of the friction energy dissipater include a plate type friction energy dissipater and a cylinder type friction energy dissipater.
However, the existing friction energy dissipater has the problems that for the plate-type friction energy dissipater, in order to provide larger friction force, a large number of bolts are additionally adopted to apply sufficient positive pressure, the consumption of the bolts is large, and the application and control of the pretightening force are complicated; for the cylindrical friction energy dissipater, the control and realization of the transverse extrusion force between the outer cylinder and the inner rod are difficult; meanwhile, the friction energy dissipation can be generated in two directions of reciprocating stress of the conventional friction energy dissipater, so that the structure has poor resetting capability and troubles are brought to post-earthquake repair.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the defects in the prior art and provides a threaded sleeve type stretching friction energy dissipater which is simple in structure, convenient to apply, low in energy consumption, small in device damage, good in effect and long in service life and a using method.
The technical scheme is as follows: the invention relates to a threaded sleeve type stretching friction energy dissipater, which comprises an anti-rotation torsion spring, a limiting screw, a friction screw and two sleeves symmetrically arranged on the friction screw, wherein the sleeves are cylindrical, a friction inner wire is arranged at the front end part in a cylindrical hole, a sleeve tail inner wire is arranged at the rear end part in the cylindrical hole, and a sleeve wall small hole is drilled on the sleeve wall between the friction inner wire and the sleeve tail inner wire; the friction screw is integrally cylindrical, two sections of friction outer wires which are respectively matched with the friction inner wires in the inner holes of the two sleeves are symmetrically arranged on a rod body of the friction screw, and the spiral directions of the two sections of friction outer wires are opposite; the friction outer wire protrudes out of the outer surface of the friction screw cylinder; two ends of the rod body of the friction screw rod are symmetrically provided with a sleeve spring thin section which is coaxial with the friction screw rod as a whole and has a reduced diameter, and the inner sides of the sleeve spring thin sections at the two ends are provided with a rod body small hole; the anti-rotation torsion spring and the limit screw are sequentially arranged on the thin section of the sleeve spring, the inner side end of the anti-rotation torsion spring penetrates through the small hole of the rod body, and the outer side end of the anti-rotation torsion spring penetrates through the small hole of the cylinder wall.
The cross section of the friction inner wire is rectangular, and the cross section of the friction outer wire matched with the friction inner wire is also rectangular.
The mutual meshed section sizes of the sleeve, the friction screw, the friction inner wire and the friction outer wire, the spiral angle parameter, the anti-rotation torsion spring and the type of the limiting screw are determined according to the engineering design requirement.
The use method of the thread sleeve type stretching friction energy dissipater comprises the following steps: according to the requirements of conventional engineering design, determining the mutual meshing section sizes of the sleeve, the friction screw, the friction inner wire and the friction outer wire, the parameters of the spiral angle, and the types of the anti-rotation torsion spring and the limiting screw;
assembling: firstly, sleeving the anti-rotation torsion spring on the thin section of the sleeve spring, and extending the straight section at one end of the inner side of the anti-rotation torsion spring into the small hole of the rod body; then, stretching the thin section ends of sleeve springs at two ends of the friction screw with the anti-rotation torsion spring into the friction inner wires of the two symmetrical sleeves respectively, and screwing the friction outer wires into the friction inner wires until a straight section at one end of the outer side of the anti-rotation torsion spring is matched with the position of the small hole in the sleeve wall and extends out of the small hole in the sleeve wall, and at the moment, the two sleeves are symmetrical to the middle cross section of the friction screw;
pre-tightening: firstly, limiting the rotary displacement of the sleeves at two ends, not limiting the axial extension displacement of the sleeves, then screwing the friction screw at the midpoint of the friction screw to drive the sleeves at two ends to move towards the directions away from each other along the longitudinal axis direction, driving the anti-rotation torsion spring to generate twisting deformation and stretching deformation in the process, then screwing the limiting screw into the tail inner wire of the sleeve until the limiting screw abuts against the tail part of the thin section of the sleeve spring, then loosening the screwing torque of the friction screw, and at the moment, keeping the whole friction energy consumer in a pre-tightening balanced state;
and (3) installation and use: connecting two ends of the pre-tightened friction energy dissipation assembly to parts required by an engineering structure, and adopting various connection modes of single connection, serial connection, parallel connection and serial and parallel connection according to different structural characteristics of the parts, and fixing the parts through cast-in-place or pre-pouring;
the working state is as follows: when the outer ends of the two sleeves are simultaneously acted by a pair of pressure, the friction screw cannot rotate due to the limitation of the limiting screw, and the whole energy dissipater works in an axial elastic compression state;
when the outer ends of the two sleeves are simultaneously subjected to a pair of pulling forces, the pair of pulling forces of the two sleeves can lead the friction outer wire of the friction screw to generate a tendency of rotating along the friction inner wires of the two sleeves, and the tendency can be hindered by elastic torque accumulated by the anti-rotation torsion spring in a twisting state;
when the pair of tension forces of the two sleeves is small, the rotation trend of the friction screw is small, the elastic torque accumulated by the anti-rotation torsion spring can prevent the rotation trend from developing into rotary motion, and the whole friction energy dissipater works in an axial elastic tension state;
when the pulling force of the two sleeves is large, the rotation trend of the friction screw is also large, the elastic torque accumulated by the anti-rotation torsion spring cannot prevent the rotation trend from developing into the rotation motion, at the moment, the friction screw starts to rotate, the anti-rotation torsion spring also generates further twisting deformation and stretching deformation along with the rotation motion, and generates torsional resistance to the rotation motion of the friction screw, meanwhile, the two sleeves linearly move towards opposite directions, the whole friction energy dissipater extends along the longitudinal axis direction under a new balance state, so that a served engineering structure is in a plastic working state, and during the period, the two sleeves bear large pulling force, so that the friction outer wire and the friction inner wire have strong contact positive pressure, and the relative rotation motion of the friction outer wire and the friction inner wire can generate large friction resistance, and a large amount of energy can be dissipated by the friction resistance;
when the friction energy dissipater is stressed reversely, namely pressed, the friction screw rod also rotates reversely, and in the period, because the restoring force direction of the anti-rotation torsion spring is the same as the rotation direction of the friction screw rod, the state of the friction screw rod when the friction screw rod rotates back to the initial pre-tightening state can be ensured without pressure actually, namely, the energy dissipater automatically resets in the process of returning to the pre-tightening state from the stretching maximum displacement state, and energy consumption can not occur; then under the action of larger repeated reciprocating tension and pressure, the friction energy dissipater can also realize the effects of repeated reciprocating energy dissipation and resetting of stretching energy dissipation-compression automatic resetting.
Has the advantages that: due to the adoption of the technical scheme, the invention provides the rotary friction force by utilizing the multi-spiral contact surface formed by the thread meshing and the positive pressure formed by the longitudinal tension to realize the unidirectional stretching energy consumption, and solves the problems that the conventional plate-type friction energy dissipater consumes a large number of pre-tightening bolts for applying the positive pressure, the transverse extrusion force between the outer cylinder and the inner rod of the cylindrical friction energy dissipater is difficult to control and realize, and the problem of poor structural reset capability caused by the reciprocating friction energy consumption. Compared with the prior art, the main advantages are as follows:
1) the energy dissipation device is constructed by utilizing the basic form of the threaded sleeve, the structure is simple, the application is convenient, for example, the reinforcing steel bar in a concrete structure can be directly replaced to realize the energy dissipation function of the structure, and the application range is wide;
2) the multi-spiral contact surface formed by thread meshing and the positive pressure formed by longitudinal tension are utilized to provide rotary friction force so as to realize energy consumption, so that the energy consumption effect is good, the device damage is small, the device can be almost used forever, and a large number of pre-tightening bolts consumed for applying the positive pressure and the problems of material consumption and installation control caused by the pre-tightening bolts are saved;
3) the critical points of elastic work (non-rotation) and plastic work (rotation) of the device can be manually controlled, the control is very simple and convenient to implement, and only the twisting torque at the midpoint of the friction screw rod is controlled during pre-tightening;
4) the one-way friction energy consumption and automatic reset can be realized, so that the excellent energy consumption and reset capability of the structure are ensured.
Drawings
FIG. 1 is a schematic view of a split structure of the sleeve of the present invention;
FIG. 2 is a schematic structural view of the friction screw of the present invention;
FIG. 3 is a schematic view of an initial assembly split structure of the present invention;
FIG. 4 is a schematic diagram of a pre-tightening assembly split structure according to the present invention;
FIG. 5 is a schematic view of a node structure in an embodiment of the present invention for a cast-in-place reinforced concrete frame structure;
FIG. 6 is a schematic view of a node structure at one side of an embodiment of the frame structure for cast-in-place reinforced concrete according to the present invention;
FIG. 7 is a schematic view showing a node structure in a second embodiment of the frame structure for assembling integral reinforced concrete according to the present invention;
FIG. 8 is a schematic view of a two-sided joint structure of an embodiment of the present invention for assembling an integral reinforced concrete frame structure;
FIG. 9 is a schematic structural view of a third node according to an embodiment of the present invention for pre-assembling a fully prefabricated reinforced concrete frame structure;
FIG. 10 is a schematic view of a three-side node structure of an embodiment of the pre-assembled fully-prefabricated reinforced concrete frame structure according to the present invention;
fig. 11 is a four-structure schematic diagram of the embodiment of the invention used for a large-deformation anchor rod.
In the figure: 1-a sleeve; 2-friction screw; 3-rubbing the internal thread; 4-cylinder tail internal thread; 5-small holes on the wall of the cylinder; 6-rubbing the outer filaments; 7-thin section of spring set; 8-a shaft aperture; 9-anti-rotation torsion spring; 10-a limit screw; 101-connecting screw; 11-upper column cast-in-situ; 12-casting a lower column in situ; 13-casting a left beam in situ; 14-casting a right beam in situ; 15-cast-in-place node; 131-cast-in-place left beam upper longitudinal bar; 132-casting longitudinal bars at the lower part of the left beam in situ; 141-casting the upper longitudinal bar of the right beam in situ; 142-casting the lower longitudinal bar of the right beam in situ; 151-casting right beam upper anchor bars in situ; 152-cast-in-place right beam lower anchor bar; 21-prefabricating an upper column; 22-prefabricating a lower column; 23-prefabricating a left beam; 24-prefabricating a right beam; 25-post-cast node; 26-left beam lamination layer; 27-right beam lamination; 251-right beam laminated layer anchor bars; 261-left beam laminated layer longitudinal bar; 271-right beam laminated layer longitudinal bar; 31-fully prefabricating the upper section of the column; 32-lower section of full precast column; 33-fully prefabricating the left beam; 34-fully prefabricating the right beam; 35-fully precast column node area; 331-left beam shoulder; 332-left beam upper bore; 333-left beam lower duct; 334-left beam upper anchor bar; 335-left beam lower anchor bar; 336-left beam upper reinforcement anchor head; 337-left beam lower reinforcement anchor head; 341-right beam shoulder; 342-right beam upper bore; 343-right beam lower port channel; 344-right beam upper anchor bars; 345-anchor bars at the lower part of the right beam; 346-right beam upper reinforcement anchor head; 347-right beam lower reinforcement anchor head; 351-node upper pore path; 352-node lower bore; 353-anchor bars at the upper parts of the nodes; 354-node lower anchor bars; 355-node upper anchor head; 356-node lower anchor head; 41-rock-soil mass; 42-anchor eye; 421-anchoring grouting body; 422-antirust grouting body; 43-anchor rod joint; 44-anchor rod anchor head.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 3, the threaded sleeve type stretching friction energy dissipater of the present invention is mainly assembled by two sleeves 1, a friction screw 2, two anti-torsion springs 9 and two limit screws 10, wherein the number of the sleeves 1 is two, the structure of the sleeves is shown in fig. 1, the two sleeves 1 are symmetrically arranged on the friction screw 2, the structure of the friction screw 2 is shown in fig. 2, the sleeves 1 are cylindrical, a friction inner wire 3 is arranged at the front end part in a cylindrical hole, a sleeve tail inner wire 4 is arranged at the rear end part, and a sleeve wall small hole 5 is drilled on the sleeve wall between the friction inner wire 3 and the sleeve tail inner wire 4; the friction inner wire 3 sinks into the inner wall of the sleeve 1; preferably, the cross section of the friction inner wire 3 is rectangular, and the drum tail inner wire 4 sinks into the inner wall of the sleeve and adopts a conventional inner wire form.
The friction screw 2 is integrally cylindrical, two sections of friction outer wires 6 which are respectively matched with the friction inner wires 3 in the inner holes of the two sleeves 1 are symmetrically arranged on a rod body of the friction screw 2, and the spiral directions of the two sections of friction outer wires 6 are opposite; the friction outer wire 6 protrudes out of the outer surface of the friction screw cylinder; preferably, the cross section of the friction outer wire 6 is rectangular and is matched with the friction inner wire 3. Two end parts of the rod body of the friction screw rod 2 are symmetrically provided with a sleeve spring thin section 7 which is coaxial with the friction screw rod 2 as a whole and has a reduced diameter, and the inner sides of the sleeve spring thin sections 7 at the two end parts are provided with a rod body small hole 8; the anti-rotation torsion spring 9 is a conventional torsion spring, the anti-rotation torsion spring 9 and the limit screw 10 are sequentially arranged on the sleeve spring thin section 7, the inner side end of the anti-rotation torsion spring 9 penetrates through the rod body small hole 8, the outer side end of the anti-rotation torsion spring penetrates through the cylinder wall small hole 5, namely, two straight sections bent out from two ends respectively correspond to the direction and the position of the cylinder wall small hole 5 and the rod body small hole 8 respectively. The limit screw 10 is a conventional cap-free screw, and an external thread of the limit screw needs to be matched with the barrel tail internal thread 4. The friction inner wire 3 and the friction outer wire 6 are required to be meshed with each other geometrically, the size of the meshed cross section of the sleeve 1, the friction screw 2, the friction inner wire 3 and the friction outer wire 6, the type of the spiral angle parameter, the anti-torsion spring 9 and the limit screw 10 are determined according to engineering design requirements, and the size of the cross section of the anti-torsion spring, the type of the spiral angle and other parameters are calculated and determined according to actual acquired information parameters.
The invention relates to a using method of a thread sleeve type stretching friction energy dissipater, which comprises the following steps: according to the engineering design requirements, determining the mutually meshed section size of the sleeve 1, the friction screw 2, the friction inner wire 3 and the friction outer wire 6 and the parameters of a spiral angle, and the models of an anti-torsion spring 9 and a limit screw 10;
assembling: firstly, the anti-rotation torsion spring 9 is sleeved on the sleeve spring thin section 7, and a straight section at one end of the inner side of the anti-rotation torsion spring 9 extends into the rod body small hole 8; then, the thin spring sections 7 at two ends of the friction screw 2 with the anti-rotation torsion springs 9 extend into the friction inner wires 3 of the two symmetrical sleeves respectively, the friction outer wires 6 are screwed into the friction inner wires 3 until the straight sections at the outer ends of the anti-rotation torsion springs 9 are matched with the positions of the small holes in the sleeve walls and extend out of the small holes 5 in the sleeve walls, and at the moment, the two sleeves 1 are symmetrical to the middle cross section of the friction screw; as shown in figure 3 of the drawings,
pre-tightening: firstly, limiting the rotary displacement of the sleeves 1 at two ends, not limiting the displacement of the sleeves extending axially, then screwing the friction screw 2 at the midpoint of the friction screw 2 to drive the sleeves 1 at two ends to move towards the direction away from each other along the longitudinal axis direction, driving the anti-rotation torsion spring 9 to generate screwing deformation and stretching deformation in the process, screwing the limit screw 10 into the tail inner wire 4 of the sleeve until the limit screw abuts against the tail part of the sleeve spring thin section 7, then loosening the screwing torque of the friction screw 2, and at the moment, keeping the whole friction energy dissipater in a pre-tightening balance state; as shown in figure 4 of the drawings,
and (3) installation and use: connecting two ends (namely the outer ends of the two sleeves 1) of the pre-tightened friction energy dissipation assembly to parts required by an engineering structure, and adopting a plurality of connection forms of single connection, serial connection, parallel connection and serial and parallel connection according to different structural characteristics of the parts, and fixing the parts through cast-in-place or pre-pouring;
the working state is as follows: when the outer ends of the two sleeves 1 are simultaneously acted by a pair of pressure, the friction screw 2 cannot rotate due to the limitation of the limiting screw 10, and the whole energy dissipater works in an axial elastic compression state;
when the outer ends of the two sleeves 1 are simultaneously subjected to a pair of pulling forces, the pair of pulling forces of the two sleeves can cause the friction outer wire 6 of the friction screw 2 to have a tendency to rotate along the friction inner wires 3 of the two sleeves, and the tendency can be hindered by elastic torque accumulated by the anti-torsion spring 9 in a twisted state;
when the pair of tension forces of the two sleeves is small, if the served engineering structure is in a normal working state, the rotation trend of the friction screw 2 is small, the elastic torque accumulated by the anti-torsion spring 9 can prevent the rotation trend from developing into rotary motion, and the whole friction energy dissipater works in an axial elastic tension state;
when the pair of tension forces of the two sleeves is large, if the served engineering structure is in a large-earthquake working state, the rotation trend of the friction screw rod 2 is also large, the elastic torque accumulated by the anti-rotation torsion spring 9 can not prevent the rotation trend from developing into the rotation motion, then the friction screw rod 2 starts to rotate, the anti-rotation torsion spring 9 also follows to further generate the tightening deformation and the stretching deformation, and generates the torsion resistance to the rotation motion of the friction screw rod 2, simultaneously, the two sleeves 1 move linearly in opposite directions, the whole friction energy dissipater extends along the longitudinal axis direction under a new balance state, so that the served engineering structure is in a plastic working state, because strong contact positive pressure can be generated between the friction outer wire 6 and the friction inner wire 3, a large friction resistance can be generated by the relative rotation motion of the friction outer wire 6 and the friction inner wire 3 at the moment, and a large amount of energy can be dissipated by the friction resistance;
when the friction energy dissipater is stressed reversely, namely is pressed, the friction screw 2 also rotates reversely, and in the period, because the restoring force direction of the anti-rotation torsion spring 9 is the same as the rotation direction of the friction screw 2, the state of the friction screw 2 when being rotated back to the initial pre-tightening state can be ensured without pressure actually, namely the energy dissipater automatically resets in the process of returning to the pre-tightening state from the stretching maximum displacement state, and energy dissipation does not occur; then under the action of larger repeated reciprocating tension and pressure, the friction energy dissipater can also realize the effects of repeated reciprocating energy dissipation and resetting of stretching energy dissipation-compression automatic resetting.
The invention will be further described with reference to examples in the drawings to which:
first embodiment, fig. 5 and 6 show an application example of the energy dissipater of the present invention in a beam-column node of a cast-in-place reinforced concrete frame structure.
As shown in fig. 5, the middle node basically comprises a cast-in-place upper column 11, a cast-in-place lower column 12, a cast-in-place left beam 13, a cast-in-place right beam 14 and a cast-in-place node 15. When in use, after the upper and lower pairs of energy dissipaters which are connected in parallel are connected in series through the cylinder tail internal thread 4, the cast-in-situ left beam upper longitudinal rib 131 and the cast-in-situ right beam upper longitudinal rib 141, and the cast-in-situ left beam lower longitudinal rib 132 and the cast-in-situ right beam lower longitudinal rib 142 are adopted; two energy dissipaters connected in series up and down are connected through a connecting screw rod 101 of the cylinder tail internal thread 4.
Similarly, as shown in fig. 6, the side node basically comprises a cast-in-place upper column 11, a cast-in-place lower column 12, a cast-in-place right beam 14 and a cast-in-place node 15. When the energy dissipater is used, the cast-in-place right beam upper anchor rib 151 and the cast-in-place right beam upper longitudinal rib 141, the cast-in-place right beam lower anchor rib 152 and the cast-in-place right beam lower longitudinal rib 142 are connected through the barrel tail inner wire 4 by the two energy dissipaters connected in parallel.
Second embodiment, fig. 7 and fig. 8 show an application example of the energy dissipater of the present invention in assembling beam-column joints of an integral reinforced concrete frame structure:
as shown in fig. 7, the middle joint comprises a prefabricated upper column 21, a prefabricated lower column 22, a prefabricated left beam 23, a prefabricated right beam 24, a post-cast joint 25, a left beam laminated layer 26 and a right beam laminated layer 27. When the energy dissipater is used, two serially connected energy dissipaters are adopted to connect the left beam laminated layer longitudinal rib 261 and the right beam laminated layer longitudinal rib 271 through the barrel tail internal thread 4; the two energy dissipaters are connected through the barrel tail inner wire 4 by a connecting screw rod 101.
Similarly, as shown in fig. 8, the edge node is basically composed of a prefabricated upper column 21, a prefabricated lower column 22, a prefabricated right beam 24, a post-cast node 25 and a right beam laminated layer 27. When in use, an energy dissipater is used for connecting the right beam laminated layer anchor bar 251 and the right beam laminated layer longitudinal bar 271 through the cylinder tail internal thread 4.
The third embodiment, fig. 9 and fig. 10 show the application embodiment of the energy dissipater of the present invention in the pre-pressing assembly of beam-column joints of a fully-prefabricated reinforced concrete frame structure:
as shown in fig. 9, the middle joint basically comprises a fully precast column upper section 31, a fully precast column lower section 32, a fully precast left beam 33, a fully precast right beam 34 and a fully precast column joint area 35. When in use, the upper energy dissipater and the lower energy dissipater which are connected in parallel are connected in series with the left beam upper anchor bar 334 and the right beam upper anchor bar 344, and the left beam lower anchor bar 335 and the right beam lower anchor bar 345 through the cylinder tail internal thread 4; the upper energy dissipater and the lower energy dissipater are connected through a connecting screw rod 101 of the cylinder tail internal thread 4.
Similarly, as shown in FIG. 10, the edge node is basically comprised of a fully precast column upper section 31, a fully precast column lower section 32, a fully precast right beam 34 and a fully precast column node area 35. When the energy dissipater is applied, two energy dissipaters which are connected in parallel up and down are adopted to connect the node upper anchor rib 353 and the right beam upper anchor rib 344, and the node lower anchor rib 354 and the right beam lower anchor rib 345 through the cylinder tail inner wire 4.
Fourth embodiment, fig. 11 shows an embodiment of the damper of the present invention used as a large deformation anchor rod in a rock and soil anchoring structure: in this embodiment, an energy dissipater is inserted into the anchor hole 42 of the rock-soil mass 41, and the anchor section in the anchor rod is anchored by the anchoring grout 421; then, the anchor rod joint 43 is connected with the barrel tail inner thread 4 at the outer end of the energy dissipater, and then the anchor rod joint 43 is tensioned and anchored by the anchor rod anchor head 44, so that the whole anchor rod is tensioned and anchored.
Claims (4)
1. The utility model provides a telescopic tensile friction energy consumer of screw thread, includes anti-rotation torsional spring and stop screw, its characterized in that: the friction screw rod and the two sleeves are symmetrically arranged on the friction screw rod, the sleeves are cylindrical, friction inner threads are arranged at the front end part in the cylindrical hole, sleeve tail inner threads are arranged at the rear end part in the cylindrical hole, and a small cylinder wall hole is drilled in the sleeve wall between the friction inner threads and the sleeve tail inner threads; the friction screw is integrally cylindrical, two sections of friction outer wires which are respectively matched with the friction inner wires in the inner holes of the two sleeves are symmetrically arranged on a rod body of the friction screw, and the spiral directions of the two sections of friction outer wires are opposite; the friction outer wire protrudes out of the outer surface of the friction screw cylinder; two ends of the rod body of the friction screw rod are symmetrically provided with a sleeve spring thin section which is coaxial with the friction screw rod as a whole and has a reduced diameter, and the inner sides of the sleeve spring thin sections at the two ends are provided with a rod body small hole; the anti-rotation torsion spring and the limit screw are sequentially arranged on the thin section of the sleeve spring, the inner side end of the anti-rotation torsion spring penetrates through the small hole of the rod body, and the outer side end of the anti-rotation torsion spring penetrates through the small hole of the cylinder wall.
2. A threaded telescopic tension friction dissipater according to claim 1, characterized in that: the cross section of the friction inner wire is rectangular, and the cross section of the friction outer wire matched with the friction inner wire is also rectangular.
3. A threaded telescopic tension friction dissipater according to claim 1, characterized in that: the mutual meshed section sizes of the sleeve, the friction screw, the friction inner wire and the friction outer wire, the spiral angle parameter, the anti-rotation torsion spring and the type of the limiting screw are determined according to the engineering design requirement.
4. Use of a threaded telescopic tensile friction consumer according to any one of claims 1 to 3: the method is characterized in that: according to the requirements of conventional engineering design, determining the mutual meshing section sizes of the sleeve, the friction screw, the friction inner wire and the friction outer wire, the parameters of the spiral angle, and the types of the anti-rotation torsion spring and the limiting screw;
assembling: firstly, sleeving the anti-rotation torsion spring on the thin section of the sleeve spring, and extending the straight section at one end of the inner side of the anti-rotation torsion spring into the small hole of the rod body; then, stretching the thin section ends of sleeve springs at two ends of the friction screw with the anti-rotation torsion spring into the friction inner wires of the two symmetrical sleeves respectively, and screwing the friction outer wires into the friction inner wires until a straight section at one end of the outer side of the anti-rotation torsion spring is matched with the position of the small hole in the sleeve wall and extends out of the small hole in the sleeve wall, and at the moment, the two sleeves are symmetrical to the middle cross section of the friction screw;
pre-tightening: firstly, limiting the rotary displacement of the sleeves at two ends, not limiting the axial extension displacement of the sleeves, then screwing the friction screw at the midpoint of the friction screw to drive the sleeves at two ends to move towards the directions away from each other along the longitudinal axis direction, driving the anti-rotation torsion spring to generate twisting deformation and stretching deformation in the process, then screwing the limiting screw into the tail inner wire of the sleeve until the limiting screw abuts against the tail part of the thin section of the sleeve spring, then loosening the screwing torque of the friction screw, and at the moment, keeping the whole friction energy consumer in a pre-tightening balanced state;
and (3) installation and use: connecting two ends of the pre-tightened friction energy dissipation assembly to parts required by an engineering structure, and adopting various connection modes of single connection, serial connection, parallel connection and serial and parallel connection according to different structural characteristics of the parts, and fixing the parts through cast-in-place or pre-pouring;
the working state is as follows: when the outer ends of the two sleeves are simultaneously acted by a pair of pressure, the friction screw cannot rotate due to the limitation of the limiting screw, and the whole energy dissipater works in an axial elastic compression state;
when the outer ends of the two sleeves are simultaneously subjected to a pair of pulling forces, the pair of pulling forces of the two sleeves can lead the friction outer wire of the friction screw to generate a tendency of rotating along the friction inner wires of the two sleeves, and the tendency can be hindered by elastic torque accumulated by the anti-rotation torsion spring in a twisting state;
when the pair of tension forces of the two sleeves is small, the rotation trend of the friction screw is small, the elastic torque accumulated by the anti-rotation torsion spring can prevent the rotation trend from developing into rotary motion, and the whole friction energy dissipater works in an axial elastic tension state;
when the pulling force of the two sleeves is large, the rotation trend of the friction screw is also large, the elastic torque accumulated by the anti-rotation torsion spring cannot prevent the rotation trend from developing into the rotation motion, at the moment, the friction screw starts to rotate, the anti-rotation torsion spring also generates further twisting deformation and stretching deformation along with the rotation motion, and generates torsional resistance to the rotation motion of the friction screw, meanwhile, the two sleeves linearly move towards opposite directions, the whole friction energy dissipater extends along the longitudinal axis direction under a new balance state, so that a served engineering structure is in a plastic working state, and during the period, the two sleeves bear large pulling force, so that the friction outer wire and the friction inner wire have strong contact positive pressure, and the relative rotation motion of the friction outer wire and the friction inner wire can generate large friction resistance, and a large amount of energy can be dissipated by the friction resistance;
when the friction energy dissipater is stressed reversely, namely pressed, the friction screw rod also rotates reversely, and in the period, because the restoring force direction of the anti-rotation torsion spring is the same as the rotation direction of the friction screw rod, the state of the friction screw rod when the friction screw rod rotates back to the initial pre-tightening state can be ensured without pressure actually, namely, the energy dissipater automatically resets in the process of returning to the pre-tightening state from the stretching maximum displacement state, and energy consumption can not occur; then under the action of larger repeated reciprocating tension and pressure, the friction energy dissipater can also realize the effects of repeated reciprocating energy dissipation and resetting of stretching energy dissipation-compression automatic resetting.
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| CN113339437A (en) * | 2021-06-09 | 2021-09-03 | 西南交通大学 | Perforated yielding type energy dissipater |
| CN114046060A (en) * | 2021-11-26 | 2022-02-15 | 国网河南省电力公司经济技术研究院 | Power transmission tower reinforcing device and method based on angle steel reinforcement energy consumption |
| CN115075418A (en) * | 2022-07-21 | 2022-09-20 | 西安建筑科技大学 | Self-resetting one-way friction energy dissipation device |
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