CN113073748A - Composite energy consumption system with displacement secondary amplification and triggering self-resetting functions - Google Patents
Composite energy consumption system with displacement secondary amplification and triggering self-resetting functions Download PDFInfo
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- CN113073748A CN113073748A CN202110279696.6A CN202110279696A CN113073748A CN 113073748 A CN113073748 A CN 113073748A CN 202110279696 A CN202110279696 A CN 202110279696A CN 113073748 A CN113073748 A CN 113073748A
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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
- 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
本发明公开了一种具有位移二次放大和触发自复位功能的复合耗能体系，属于建筑结构消能减振技术领域。所述体系主要由位移二次放大机构和触发自复位阻尼器构成。该体系可在占用空间较小的前提下利用位移放大装置的特点将结构层间位移进行放大并加载于阻尼器两端，使得触发自复位阻尼器充分变形耗能。在小震时阻尼器自复位功能并不触发，通过镂空金属套筒发生面内塑性变形耗散地震能量，而在大震作用下阻尼器自复位功能触发，在高校耗散能量的同时减小结构残余塑性变形。同时由于触发自复位阻尼器的塑性变形主要集中于镂空金属套筒，因而震后易通过更换构件快速修复。
The invention discloses a composite energy dissipation system with the functions of secondary displacement amplification and triggering self-reset, belonging to the technical field of energy dissipation and vibration reduction of building structures. The system is mainly composed of a displacement secondary amplification mechanism and a trigger self-reset damper. The system can use the characteristics of the displacement amplifying device to amplify the interlayer displacement of the structure and load it on both ends of the damper under the premise of occupying a small space, so that the trigger self-resetting damper can fully deform and consume energy. The self-resetting function of the damper is not triggered during small earthquakes, and the seismic energy is dissipated by in-plane plastic deformation of the hollow metal sleeve, while the self-resetting function of the damper is triggered under the action of large earthquakes, which reduces the energy dissipation in high schools. Residual plastic deformation of the structure. At the same time, since the plastic deformation that triggers the self-resetting damper is mainly concentrated in the hollow metal sleeve, it is easy to quickly repair by replacing the components after the earthquake.
Description
Technical Field
The invention relates to a composite energy consumption system with functions of secondary displacement amplification and triggering self-resetting, and belongs to the field of energy dissipation and vibration reduction of building structures.
Background
Earthquake disasters can cause damage and even collapse of building structures, so that casualties and economic losses are caused. The earthquake is an energy input process in nature in a building structure, and in a traditional earthquake-resistant structure, the structure energy consumption can be mainly attributed to the self damping energy consumption of the structure and the plastic deformation or crack energy consumption of the structure, but the self plastic deformation or crack generation is also expressed as the structural damage. And the energy dissipation device is additionally arranged in the structure, so that the energy consumption capability of the structure is improved, the energy dissipated by the structure at the cost of damage is reduced, the damage of the structure under the action of an earthquake is effectively reduced, and the safety of the structure is protected. Meanwhile, the building structure applying the energy dissipation and vibration reduction device is an anti-seismic structure, the requirement on the rigidity of the structural member is obviously reduced, the size of the structural member is smaller, and the construction cost can be effectively reduced under the reasonable design. In conclusion, the structure energy dissipation and vibration reduction technology has great development potential and good application prospect.
The energy dissipation and vibration reduction technology is still developed to the present, and firstly, the displacement of the lower layer of a building structure under the excitation action of a medium-small earthquake or strong wind is small, the deformation of the damper in the current common damper arrangement mode is limited, so that the damper cannot give full play to the efficiency, and the vibration reduction effect is limited. Meanwhile, the existing damper arrangement mode usually occupies a large space and greatly influences the arrangement of doors and windows, and the existing damper arrangement mode is obviously deviated from the modern design concept of advocating and increasing the use space of buildings. Aiming at the metal damper, the metal damper only provides lateral stiffness for the structure under the action of medium and small earthquakes in the existing arrangement mode, and almost does not exert the energy consumption capability of the metal damper; the energy consumption capability of the structure is exerted under the action of a large earthquake, but the structure does not provide restoring force, so that the P-delta effect of the structure in the earthquake is obvious, the residual deformation after the earthquake is too large, and the safety of the structure is further influenced.
Through the analysis, the invention provides a composite energy consumption system with displacement secondary amplification and triggering self-resetting functions. The system mainly comprises a displacement amplification mechanism connecting rod and a triggering self-resetting damper. Wherein the displacement amplification mechanism is formed by combining a generalized toggle displacement amplification mechanism and a cross-brace type displacement amplification mechanism. The positions of the joints of the upper connecting rod, the lower connecting rod and the structure of the generalized toggle displacement amplification mechanism can be selected according to the use requirements of building space, the arrangement has great flexibility, and the occupied space is controllable. The generalized toggle displacement amplification mechanism can amplify part of interlayer displacement and convert the part of interlayer displacement into displacement at two ends of the cross-brace type displacement amplification mechanism, and the cross-brace type displacement amplification mechanism further amplifies the displacement at the two ends and acts on two ends of the trigger self-reset damper. The displacement amplification characteristics of the generalized toggle displacement amplification mechanism and the cross-brace type displacement amplification mechanism can be simply embodied by displacement amplification coefficients, the displacement amplification characteristics of the two displacement secondary amplification mechanisms can be obtained by multiplying the displacement amplification coefficients of the two displacement secondary amplification mechanisms, obviously, the displacement amplification capability of the displacement secondary amplification mechanism is superior, and the energy consumption capability of the damper can be fully exerted even if the displacement between the structural layers under medium and small earthquakes is small. When the relative displacement of the two ends is small, the trigger self-resetting damper is mainly subjected to in-plane plastic deformation by the hollow metal sleeve to dissipate energy, and the internal trigger self-resetting device does not play a role. When the displacement of the two ends of the damper is larger, the shape memory alloy bar or the spring in the self-resetting device slides out of the spring sleeve, and then the spring sleeve contracts to fix the shape memory alloy bar or the spring, so that the self-resetting characteristic of the self-resetting device is realized by triggering. Meanwhile, the external hollow metal sleeve is an economic component which is easy to replace, the internal trigger self-resetting device is easy to disassemble and reset, and extra economic cost is not needed, so that the trigger self-resetting damper has good restorability.
In conclusion, the system remarkably overcomes the defects of large occupied building structure using space, low energy consumption efficiency under medium and small earthquakes and no structural restoring force under large earthquakes in the conventional energy dissipation and vibration reduction means, and is a composite energy consumption system with wide application prospect.
Disclosure of Invention
The invention provides a composite energy consumption system with displacement secondary amplification and triggering self-reset functions, which aims to overcome the defects that the existing energy dissipation and vibration reduction means occupies large space, is low in energy consumption efficiency under medium and small earthquakes, does not provide structural restoring force under large earthquakes, is difficult to restore after earthquakes or is high in restoring cost and the like. The system is flexible in arrangement and small in occupied space, can enable the damper to be fully deformed and consume energy even if the displacement between layers is small due to the secondary displacement amplification characteristic, and in addition, the self-resetting triggering characteristic is utilized to enable the damper to only play the energy consumption characteristic of the metal damper under the action of small vibration and play the self-resetting function under the action of large vibration, so that the restoring force is provided for the structure to avoid the overlarge residual deformation of the structure. In order to achieve the purpose, the invention adopts the following technical scheme:
the universal wrist joint comprises a universal wrist joint lower connecting rod 1, a universal wrist joint upper connecting rod 2, a scissor-brace inner side lower connecting rod 3, a scissor-brace outer side lower connecting rod 4, a scissor-brace inner side upper connecting rod 5, a scissor-brace outer side upper connecting rod 6, a bearing 7, a pin shaft 8, a damper end plate 9, a split bolt 10, a hollow metal sleeve 11, a nut 12, an SMA self-resetting member 13, a self-resetting member compression sleeve 14, a buckling-preventing sleeve 15, a self-resetting member stretching sleeve 16, a spring sleeve 17, an energy-consuming system and structure connecting part 18 and a split pin 19. The self-resetting device is characterized in that a spring sleeve 17 is sleeved at one end of a thick cap-shaped clamping piece of an SMA self-resetting member 13, one end, provided with threads, of the SMA self-resetting member 13 penetrates through a self-resetting member stretching sleeve 16, a bolt hole in a buckling-preventing sleeve 15 and a corresponding bolt hole in the middle of a damper end plate 9 and is finally fixed through a nut 12, a self-resetting member compression sleeve 14 and the self-resetting member stretching sleeve 16 are screwed through the threads of the self-resetting member compression sleeve and the self-resetting member stretching sleeve 16, and one end of a screw rod of the self-resetting. The hollow metal sleeve 11 is located between the two damper end plates 9 and connected with the damper end plates 9 through split bolts 10 and nuts 12. And bearings 7 are arranged in end plate connecting holes at the end parts of the damper end plate 9, the generalized toggle lower connecting rod 1, the generalized toggle upper connecting rod 2, the scissor-strut inner lower connecting rod 3, the scissor-strut outer lower connecting rod 4, the scissor-strut inner upper connecting rod 5 and the scissor-strut outer upper connecting rod 6, and the outer walls of the bearings 7 are fixedly connected with the inner walls of the connecting holes. All connecting rods are connected with the building construction and the damper by adopting a pin shaft 8 and a cotter pin 19, and the damper end plate 9 is connected with the building structure by adopting the pin shaft 8 and the cotter pin 19.
The included angle between the generalized toggle lower connecting rod 1 and the horizontal line is determined according to the requirement of the maximum interlayer displacement of the structure so as to prevent the generalized toggle lower connecting rod 1 and the generalized toggle upper connecting rod 2 from being pulled and even damaged under the action of an earthquake, and the value range of the included angle is 0-40 degrees. When the requirement of the displacement between the structural layers is small, the included angle between the lower connecting rod 1 of the generalized toggle and the horizontal line can be properly larger, the displacement amplification capability of the generalized toggle is correspondingly enhanced, and the displacement amplification capability of the corresponding displacement secondary amplification mechanism is also enhanced.
Enough rotating space is reserved at the joints among the generalized toggle lower connecting rod 1, the generalized toggle upper connecting rod 2, the scissor-brace inner side lower connecting rod 3, the scissor-brace outer side lower connecting rod 4, the scissor-brace inner side upper connecting rod 5, the scissor-brace outer side upper connecting rod 6 and the damper end plate 9, so that the locking failure caused by insufficient reserved space is avoided. Each connecting rod is a solid steel rod, each connecting rod has enough strength to ensure that plastic deformation does not occur during earthquake action, the strength of steel is at least more than 500Mpa, connecting holes among the connecting rods, connecting rods and structural beams and columns and connecting holes among the connecting rods and dampers are concentric and are attached to each other without gaps, and a bearing 7 and a pin shaft 8 in the connecting hole at the end part of each connecting rod are also not provided with gaps.
The pin shaft 8 is made of metal, the cross section of the pin shaft is circular, the material strength of the pin shaft is at least more than 600MPa, the diameter of the cross section of the pin shaft 8 is not too small and can be selected between 1cm and 3cm according to the requirement of shear strength, a cap-shaped clamping piece is arranged at one end of the pin shaft 8, a circular through hole perpendicular to the central axis of the pin shaft 8 is formed in the other end of the pin shaft 8, the diameter of the through hole can be 20% -60% of that of the pin shaft 8, and the hole opening end of the pin shaft 8 can penetrate into the central hole of the bearing 7. The shortest distance from the bottom of the cap-shaped clamping piece of the pin shaft 8 to the edge of the through hole on the other side is 0.5-1 mm larger than the sum of the thicknesses of the connecting plates of the connected components, so that the installation is convenient, and the pin shaft 8 cannot slide excessively in the central hole of the bearing 7 after the cotter pin 19 is inserted and fixed.
The diameter of the eye of the split pin 19 should be larger than the diameter of the through hole in the pin 8, and the cross section of the split pin when the two legs are not separated should be circular and the diameter of the split pin should be equal to or slightly smaller than the diameter of the through hole in the pipe. When the cotter pin 19 is inserted into the pin shaft 8 to connect the connecting parts, the two feet are separated to realize fixation.
The damper end plate 9 is made of metal and comprises an overhanging support, a plane end plate and a metal sleeve connecting plate, the strength of steel used by the damper end plate 9 is at least more than 500MPa, the end part of the overhanging support of the damper is provided with a connecting hole and is internally provided with a bearing 7, and the inner diameter of the bearing 7 is the same as that of the bearing positioned in the connecting hole at the end part of each connecting rod and is equal to that of the connecting hole 18 at the connecting part of the energy dissipation system and the structure; the component is connected with a lower connecting rod 4 at the outer side of the cross brace, an upper connecting rod 5 at the inner side of the cross brace and an upper connecting rod 6 at the outer side of the cross brace through a pin shaft 8 and a cotter 19; a bolt hole is formed in the plane end plate, a screw at two ends of the triggering self-resetting device is inserted into the bolt hole, and the bolt hole are connected through a nut 12; the hollow metal sleeve 11 penetrates through the metal sleeve connecting plate by the split bolt 10 to be connected with the damper end plate 9; the damper end plate 9 should be elastic even when the hollow metal sleeve 11 is out of the way and the self-reset damper is triggered to go out of force.
The side wall of the hollow metal sleeve 11 is provided with hollow holes with different shapes or sizes along the central axis direction of the cylinder body so as to realize multi-stage in-plane yielding of the metal cylinder body. If the cross section of the sleeve is polygonal, weakening treatment needs to be carried out on each edge. The wall thickness of the hollow metal sleeve 11 should be 0.2 cm-2 cm according to the energy consumption requirement.
The two ends of the SMA self-resetting member 13 are respectively provided with a cap-shaped clamping piece and a screw, the diameter of the screw end is equal to the diameter of the opening at the bottom of the buckling-restrained sleeve 15 and is smaller than the diameter of the opening at the bottom of the self-resetting member stretching sleeve 16, a clamping piece is arranged at a certain distance from the end thread of the screw end, the end thread is equal to the sum of the thickness of the bottom of the buckling-restrained sleeve 15 and the thickness of the plane end plate of the damper end plate 9 according to the distance of the clamping piece, the clamping piece is used for preventing the SMA self-resetting member 13 from sliding out of the opening at the bottom of the buckling-restrained. The cap clip of SMA self-resetting member 13 is sized to not pass through the bottom hole of the self-resetting member tensioning sleeve 16. The SMA self-resetting member 13 can be made of steel in the length of the screw end portion and the length of the cap-shaped fastener end portion, thereby saving cost.
The spring sleeve 17 is made of steel, the yield strength of the steel is at least more than 500Mpa, a through vertical seam is arranged along the central axis direction, and the diameter of the sleeve is slightly smaller than that of the cap-shaped clamping piece of the SMA self-resetting member 13 in the original state but is larger than that of an opening at the bottom of the self-resetting member stretching sleeve 16. When the relative motion of two ends of the triggered self-resetting composite damper is small in the triggered self-resetting device, the cap-shaped clamping piece at the end part of the SMA self-resetting member 13 reciprocates in the spring sleeve 17, at the moment, the self-resetting characteristic is not triggered, when the relative motion of two ends of the triggered self-resetting composite damper is large, the spring sleeve 17 does not move under the action of the self-resetting member compressing sleeve 14, the cap-shaped clamping piece at the end part of the SMA self-resetting member 13 can slide out of a track formed by the spring sleeve 17, at the moment, the spring sleeve 17 restores to the original state, and the cap-shaped clamping piece at the end part of the SMA self-resetting member 13 cannot enter the spring sleeve 17 to realize self-locking and.
The self-resetting member compression sleeve 14 is made of steel, the yield strength of the steel is at least more than 500Mpa, the two ends of the steel are respectively provided with a screw and a hollow cylinder, the middle part of the steel is provided with a solid-web cylinder, the solid-web cylinder is divided into two sections, the diameters of the two sections are different, the section with the larger diameter is close to the end of the screw, and the diameter of the section is the same as the outer diameter of the self-resetting member tension sleeve 16; the end with smaller radius is close to the end of the hollow cylinder, the outer part of the end is provided with threads, and the threads can be screwed with the threads on the inner wall of the self-resetting member stretching sleeve 16 to form a cylinder with a cavity in the middle; the outer diameter of the screw is equal to the diameter of a bolt hole on a plane end plate of the damper end plate 9, and the diameter of the solid web column is larger than that of the bolt hole on the plane end plate; the inner diameter of the hollow cylinder is larger than the diameter of the cap-shaped clamping piece at the end part of the SMA self-resetting member 13, but is smaller than the inner diameter of the spring sleeve 17 in a natural state, and the depth of the hollow cylinder is equal to the height of the cap-shaped clamping piece at the end part of the SMA self-resetting member 13.
The self-resetting member stretching sleeve 16 is made of steel, the yield strength of the steel is at least more than 500Mpa, the steel is a cylinder with an opening at the bottom of an inner groove, and the diameter of the opening at the bottom is larger than that of a clamping piece at the screw end of the SMA self-resetting member 13 and smaller than that of a cap-shaped clamping piece of the SMA self-resetting member 13. The internal slot is a cylindrical slot, the inner wall of the cylinder is provided with threads and is matched with the threads outside the hollow cylinder body of the self-resetting member compression sleeve 14, and the inner diameter of the cylinder is equal to the sum of the diameter of the cap-shaped clamping piece of the SMA self-resetting member 13 and the wall thickness of the spring sleeve 17 which is 2 times of the diameter of the cap-shaped clamping piece;
the composite energy consumption system with the functions of displacement secondary amplification and triggering self-resetting has great flexibility in arrangement and controllable occupied space, and can be configured in system geometric shapes according to the requirements of owners. The system can amplify the displacement between the structural layers and act on two ends of the damper, the damper has a multi-stage yield mechanism due to the non-uniform hollow characteristic of the metal sleeve, the self-reset function does not play a role under the action of small earthquake, and the antagonism of hysteretic energy consumption and the self-reset function is avoided. And the self-reset function can be triggered to provide additional restoring force for the mechanism under the action of large shock, so that the integral residual deformation of the structure is effectively reduced.
Compared with the prior energy dissipation and vibration reduction means, the invention has the advantages that:
1. the arrangement is flexible, the occupied space is small, and the pursuit of modern building structures for the use space is met.
2. The system can keep high-efficiency energy consumption efficiency under medium and small earthquakes by virtue of good interlayer displacement amplification capacity and a multi-stage yield mechanism, lateral rigidity is provided for the structure, and meanwhile, the self-reset function is not triggered, so that antagonism between the self-reset function and energy consumption is avoided.
3. Under the action of a large earthquake, the self-resetting self-locking device not only has a multi-stage yield function and can dissipate a large amount of energy for the structure, but also can trigger the self-resetting function and provide enough restoring force for the structure to avoid the structure from generating overlarge residual deformation under the action of the large earthquake.
4. The repairability is strong, only need tear open and trade fretwork metal sleeve after the earthquake and can realize restoreing, triggers convenient the dismantlement from resetting device, only needs to realize the function recovery with the spring sleeve reseing, consequently need not change.
Drawings
Fig. 1 is an overall schematic diagram of a composite energy consumption system with displacement secondary amplification and triggering self-resetting functions.
Fig. 2 is a schematic view of a triggered self-resetting damper.
Fig. 3 is a cross-sectional view of a triggered self-resetting device.
Fig. 4 is a schematic view of each link.
FIG. 5 is a schematic view of the pin and cotter connection.
Fig. 6 is a schematic view of SMA rods or springs.
Figure 7 is a schematic view of a damper end plate.
FIG. 8 is a schematic view of a hollowed-out metal sleeve.
FIG. 9 is a schematic of a self-resetting member compression sleeve, a self-resetting member tension sleeve, an anti-buckling sleeve, and a spring sleeve
FIG. 10 is a hysteresis curve diagram of a triggered self-resetting damper
In the figure: 1-generalized toggle lower link; 2-generalized toggle upper link; 3-a lower connecting rod at the inner side of the scissor brace; 4-a lower connecting rod outside the cross brace; 5-connecting rods are arranged on the inner sides of the scissor supports; 6-connecting rods are arranged on the outer sides of the cross braces; 7-a bearing; 8-a pin shaft; 9-damper end plate; 10-split bolts; 11-a metal sleeve; 12-a nut; 13-SMA rods or springs; 14-a self-resetting member compression sleeve; 15-anti-buckling sleeve; 16-a self-resetting member tensioning sleeve; 17-a spring sleeve; 18-the junction of the energy consuming system and the structure; 19-cotter pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
As shown in the attached drawings 1 and 2, the composite energy consumption system with the displacement secondary amplification and triggering self-resetting functions comprises a generalized toggle lower connecting rod 1, a generalized toggle upper connecting rod 2, a scissor-brace inner lower connecting rod 3, a scissor-brace outer lower connecting rod 4, a scissor-brace inner upper connecting rod 5, a scissor-brace outer upper connecting rod 6, a bearing 7, a pin shaft 8, a damper end plate 9, a split bolt 10, a hollow metal sleeve 11, a nut 12, an SMA (shape memory alloy) bar or spring 13, a self-resetting member compression sleeve 14, a buckling-preventing sleeve 15, a self-resetting member stretching sleeve 16, a spring sleeve 17, an energy consumption system and structure connecting part 18, a split pin 19 and other parts. The distance between the centers of circles of connecting holes at two ends of each component is recorded as the length of the component, the length of a generalized toggle lower connecting rod 1 is 1.473m, the length of a generalized toggle upper connecting rod 2 is 2.992m, the length of a scissor-strut inner side lower connecting rod 3 is 1.35m, the length of a scissor-strut outer side lower connecting rod 4 is 1.453m, the length of a scissor-strut inner side upper connecting rod 5 is 0.9m, the length of a scissor-strut outer side upper connecting rod 6 is 1.001m, the cross section of each connecting rod is a cube with the diameter of 0.2m x 0.2m, the thickness of an end connecting plate is 30mm, steel materials used for the connecting rods are steel materials with the yield strength of 500Mpa, the inner diameter of a bearing 7 in the connecting holes at the two ends of the. The diameter of the pin shaft 8 is 20mm, the diameter of a through hole of the cotter pin 19 on the pin shaft 8 is 10mm, and the pin shaft 7 and the cotter pin 19 are made of steel with the yield strength of 600 Mpa. The distance between the circle centers of connecting holes between damper end plates 9 on two sides of the triggered self-resetting damper is 1.386m, the size and the model of a built-in bearing 7 are consistent with those of a connecting rod middle bearing, the distance between the circle center of the connecting hole extending outwards of the damper end plate 9 and a plane end plate is 300mm, the thickness of the plane end plate is 43mm, the plane end plate is rectangular in the direction perpendicular to the thickness direction, the side lengths are 300mm and 500mm respectively, the diameter of an upper bolt hole is 20mm, the thickness of a metal sleeve connecting plate is 10mm, the diameter of the upper bolt hole is 20mm, and the component is made of steel with the. The hollow metal sleeve 11 is made of mild steel material, has a thickness of 20mm, a length of 700mm along the central axis direction thereof, and is slotted into a long round hole or an elliptical hole on the side surface, and the length is gradually reduced from two ends to the middle. The length of the middle triggered self-resetting device in the initial state is 820mm, the lengths of the screws at two ends are 60mm, the SMA bar or the spring 13 is in a multi-section cylindrical shape, the diameter of the cap-shaped clamping piece is 35mm, the height of the cap-shaped clamping piece is 15mm, the diameter of the clamping piece at the bolt end is 31mm, the middle section of the two clamping pieces is a cylindrical SMA bar with the diameter of 30mm, and the length of the SMA bar or the spring 13 is 500mm when the SMA bar or the spring is. The spring sleeve 17 has a diameter of 35.5mm, an inner diameter of 34mm, a depth of 30mm in the original state, and is made of a steel material having a yield strength of 500 Mpa. The yield strength of the steel material of the self-resetting member compression sleeve 14 is 500Mpa, the length of a cylinder where a thread is located is 60mm, the outer diameter of the thread is 20mm, the length of a middle solid-web cylinder is 250mm, the diameter of a larger section is 40mm, the length of the section is 175mm, the diameter of a smaller section is 38mm, the length of the smaller section is 75mm, the height of a hollow cylinder is 20mm, and the inner diameter of the hollow cylinder is 35 mm. The self-resetting member stretching sleeve 16 is made of steel with the yield strength of 500Mpa, the inner diameter of the steel is 38mm, the outer diameter of the steel is 40mm, the diameter of a hole at the bottom of the steel is 31mm, and the total length of the steel is 180 mm. The buckling-restrained sleeve 15 is made of steel with the yield strength of 500Mpa, the length of the buckling-restrained sleeve is 600mm, the inner diameter of a bolt hole at the bottom of the buckling-restrained sleeve is 30mm, and the inner diameter of the buckling-restrained sleeve 15 is 40 mm.
The assembly process of the triggering self-resetting damper is as follows: firstly, assembling a triggering self-resetting device, as shown in fig. 3, 6 and 9, sleeving a spring sleeve 17 on an SMA (shape memory alloy) bar or a cap-shaped clamping piece of a spring 13, adjusting the position to enable the cap-shaped clamping piece to be positioned in the middle of the spring sleeve 17, wherein one half of the length of the spring sleeve 17 is the length triggered by the self-resetting function, and when the distance between damper end plates 9 is shortened by more than the triggering length, the self-resetting function is triggered. The screw end of the SMA rod or spring 13 is then passed through the bottom hole of the self-resetting member tension sleeve 16 and the self-resetting member compression sleeve 14 is butted against the self-resetting member tension sleeve 16, and then the combination is inserted into the buckling restrained sleeve 15 and fixed with the damper end plate 9 on one side, the damper end plate 9 being as shown in fig. 7. After the triggered self-resetting devices in the hollow metal sleeve 11 are installed, the external hollow metal sleeve 11 and the damper end plate 9 are fixed through the split bolt 10, and the hollow metal sleeve 11 is shown in fig. 8. And finally, aligning and installing the hole site on the damper end plate 9 at the other end with the hole site of the hollow metal sleeve 11 and the screw of the triggering self-resetting device, and fixing the hole site and the hole site through a split bolt 10, so that the assembly of the triggering self-resetting damper is finished.
The generalized toggle lower connecting rod 1, the generalized toggle upper connecting rod 2, the scissor-brace inner side lower connecting rod 3, the scissor-brace outer side lower connecting rod 4, the scissor-brace inner side upper connecting rod 5 and the scissor-brace outer side upper connecting rod 6 form a displacement secondary amplification device in a system, the generalized toggle lower connecting rod 1 and the generalized toggle upper connecting rod 2 form a generalized toggle displacement amplification mechanism, and the scissor-brace inner side lower connecting rod 3, the scissor-brace outer side lower connecting rod 4, the scissor-brace inner side upper connecting rod 5 and the scissor-brace outer side upper connecting rod 6 form a scissor-brace type displacement amplification mechanism. When the displacement secondary amplifying device is installed, as shown in fig. 1, 4 and 5, the generalized toggle lower connecting rod 1 and the energy dissipation system and structure connecting part 18 are connected through the pin shaft 8 and the split pin 19, and the end plate of the generalized toggle lower connecting rod 1 is arranged on the front side of the ear plate of the energy dissipation system and structure connecting part 18. And then the inner upper connecting rod 5 and the outer upper connecting rod 6 of the cross brace are respectively fixed at the front side and the rear side of the ear plate 18 at the joint of the energy dissipation system and the structure. The triggered self-resetting damper is connected with the upper inner side connecting rod 5 of the scissor brace and the lower inner side connecting rod 3 of the scissor brace, and the upper inner side connecting rod 5 of the scissor brace, the damper end plate 9 and the lower inner side connecting rod 3 of the scissor brace are sequentially arranged at the connection part from the front side to the rear side. And then, the damper end plate 9 at the other side of the triggered self-resetting damper is connected with the upper cross brace outer side connecting rod 6 and the lower cross brace outer side connecting rod 4, the damper end plate 9 and the upper cross brace outer side connecting rod 6 are sequentially arranged at the joint from the front side to the rear side.
And finally, connecting the generalized toggle upper connecting rod 2 to the front side of the ear plate at the connecting part 18 of the beam upper energy dissipation system and the structure, and connecting the generalized toggle lower connecting rod 1, the generalized toggle upper connecting rod 2, the scissor-brace inner side lower connecting rod 3 and the scissor-brace outer side lower connecting rod 4. The system is now assembled. The system is simple in structure, the components are prefabricated in a factory, welding is not needed during field installation, and the system is convenient and efficient. The system can amplify the structural displacement and act on two ends of the triggered self-resetting damper, the mechanical mechanism of the damper has self-adaptive characteristics along with different earthquake sizes, the self-resetting function of the damper under small earthquake is not triggered, the energy consumption is mainly realized by the yield of an external metal sleeve, the self-resetting function of the damper is triggered under large earthquake and additional restoring force is provided for the structure, and the residual deformation of the structure can be effectively reduced. The system has good damping effect, is very flexible and flexible in arrangement and small in occupied space, and accords with the building concept of increasing the use space in the current worries.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A composite energy consumption system with displacement secondary amplification and triggering self-reset functions is characterized in that: the spring sleeve (17) is sleeved at one end of a cap-shaped clamping piece of the SMA self-resetting member (13), one end, provided with threads, of the SMA self-resetting member (13) penetrates through a bolt hole in the self-resetting member stretching sleeve (16) and a bolt hole in the buckling-restrained sleeve (15) and a corresponding bolt hole in the middle of the damper end plate (9) and is finally fixed through a nut (12), the self-resetting member compression sleeve (14) and the self-resetting member stretching sleeve (16) are screwed through the threads of the two, and one end of a screw rod of the self-resetting member compression sleeve (14) penetrates through the damper end plate (9) on the other side and is fixed through; the hollow metal sleeve (11) is positioned between the two damper end plates (9) and is connected with the damper end plates (9) through split bolts (10) and nuts (12); bearings (7) are arranged in end plate connecting holes at the outer side of a damper end plate (9), a generalized toggle lower connecting rod (1), a generalized toggle upper connecting rod (2), a scissor-strut inner side lower connecting rod (3), a scissor-strut outer side lower connecting rod (4), a scissor-strut inner side upper connecting rod (5) and a scissor-strut outer side upper connecting rod (6), and the outer wall of each bearing (7) is fixedly connected with the inner wall of each connecting hole; all connecting rods are connected with the building construction and the damper by adopting pin shafts (8) and cotter pins (19), and the damper end plate (9) is connected with the building structure by adopting the pin shafts (8) and the cotter pins (19).
2. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the included angle between the lower connecting rod (1) of the generalized toggle joint and the horizontal line is determined according to the requirement of the maximum interlayer displacement of the structure, and the value range of the included angle is 0-40 degrees.
3. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the joints among the generalized toggle lower connecting rods (1), the generalized toggle upper connecting rods (2), the bridging inner side lower connecting rods (3), the bridging outer side lower connecting rods (4), the bridging inner side upper connecting rods (5), the bridging outer side upper connecting rods (6) and the damper end plates (9) reserve rotating spaces for all parts, and each connecting rod is a solid metal rod.
4. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the pin shaft (8) is made of metal and has a circular cross section.
5. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the diameter of the eye ring of the cotter pin (19) is larger than that of the through hole on the pin shaft (8), the cross section is circular when the two legs are not separated, and the diameter is equal to or smaller than that of the through hole of the pipe; when the cotter pin (19) penetrates the pin shaft (8) to realize connection of the connecting parts, the two feet are separated to realize fixation.
6. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the damper end plate (9) is made of metal and consists of an overhanging support, a plane end plate and a metal sleeve connecting plate, a connecting hole is formed in the end part of the overhanging support of the damper and a bearing (7) is arranged in the end part of the overhanging support of the damper, and the inner diameter of the bearing (7) is the same as that of the bearing positioned in the connecting hole at the end part of each connecting rod and is equal to that of the connecting hole at the connecting part (18) of the energy dissipation system and the; the component is connected with a lower connecting rod (4) at the outer side of the cross brace, an upper connecting rod (5) at the inner side of the cross brace and an upper connecting rod (6) at the outer side of the cross brace through a pin shaft (8) and a cotter pin (19); the plane end plate is provided with a bolt hole, and screws at two ends of the triggering self-resetting device are inserted into the bolt hole and connected through a nut (12); the hollow metal sleeve (11) penetrates through the metal sleeve connecting plate through a split bolt (10) to be connected with the damper end plate (9); the damper end plate (9) is required to keep elasticity when the hollow metal sleeve (11) is hollowed out and the self-reset damper is triggered to generate ultimate force.
7. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the side wall of the hollow metal sleeve (11) is provided with hollow holes with different shapes or sizes along the central axis direction of the cylinder body.
8. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the two ends of the SMA self-resetting member (13) are respectively provided with a cap-shaped clamping piece and a screw rod, the diameter of the end of the screw rod is equal to the diameter of an opening at the bottom of the buckling-restrained sleeve (15), meanwhile, the diameter of the opening at the bottom of the self-resetting member stretching sleeve (16) is smaller than the diameter of the opening at the bottom of the screw rod, a clamping piece is arranged at a certain distance away from the end of a screw thread at the end of the screw rod, the end of the screw thread is equal to the sum of the thickness of the bottom of the buckling-restrained sleeve (15) and the thickness of a plane end plate of the damper end plate (; the cap-shaped clamping piece of the SMA self-resetting member (13) cannot pass through a bottom hole of a self-resetting member stretching sleeve (16); the length of the end part of the screw rod and the length of the end part of the cap-shaped clamping piece of the SMA self-resetting member (13) are made of steel.
9. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the spring sleeve (17) is made of steel, when the relative motion of two ends of the triggered self-resetting composite damper is small in the triggered self-resetting device, the cap-shaped clamping piece at the end part of the SMA self-resetting member (13) does not move in the spring sleeve (17) in a reciprocating mode, at the moment, the self-resetting characteristic is not triggered, when the relative motion of two ends of the triggered self-resetting composite damper is large, the spring sleeve (17) does not move under the action of the self-resetting member compression sleeve (14), the cap-shaped clamping piece at the end part of the SMA self-resetting member (13) can slide out of a track formed by the spring sleeve (17), at the moment, the spring sleeve (17) restores to the original state, the cap-shaped clamping piece at the end part of the SMA self-resetting member (13) cannot enter the spring sleeve (17) to.
10. The composite energy consumption system with the functions of displacement secondary amplification and triggering self-reset as claimed in claim 1, wherein: the self-resetting member compression sleeve (14) is made of steel, two ends of the self-resetting member compression sleeve are respectively provided with a screw and a hollow cylinder, the middle part of the self-resetting member compression sleeve is a solid-web cylinder, the solid-web cylinder is divided into two sections, the diameters of the two sections are different, the section with the larger diameter is close to the end of the screw, and the diameter is the same as the outer diameter of the self-resetting member stretching sleeve (; the end with smaller radius is close to the end of the hollow cylinder, the outer part of the end is provided with threads, and the threads are screwed with the threads on the inner wall of the self-resetting member stretching sleeve (16) to form a cylinder with a cavity in the middle; the outer diameter of the screw is equal to the diameter of a bolt hole on a plane end plate of the damper end plate (9), and the diameter of the solid-web column is larger than that of the bolt hole on the plane end plate; the inner diameter of the hollow cylinder is larger than the diameter of the cap-shaped clamping piece at the end part of the SMA self-resetting member (13) but smaller than the natural inner diameter of the spring sleeve (17), and the depth of the hollow cylinder is equal to the height of the cap-shaped clamping piece at the end part of the SMA self-resetting member (13);
the self-resetting member stretching sleeve (16) is made of steel, the internal groove is a cylindrical groove, the inner wall of the cylinder is provided with threads and matched with the external threads of the hollow cylinder body of the self-resetting member compressing sleeve (14), and the inner diameter of the cylinder is equal to the sum of the diameter of the cap-shaped clamping piece of the SMA self-resetting member (13) and the wall thickness of the double spring sleeve (17).
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| US11982099B2 (en) * | 2021-08-20 | 2024-05-14 | Beijing University Of Technology | Bottom corner damper with displacement amplification function and fabricated type shear wall with rocking energy dissipation |
| US20230055344A1 (en) * | 2021-08-20 | 2023-02-23 | Beijing University Of Technology | Bottom corner damper with displacement amplification function and fabricated type shear wall with rocking energy dissipation |
| CN114658139A (en) * | 2022-03-10 | 2022-06-24 | 北京市建筑设计研究院有限公司 | Efficient damping swing wall with scissor type amplification device |
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| CN117306730A (en) * | 2023-10-20 | 2023-12-29 | 同济大学 | A large-size X-shaped cable energy dissipation component based on a scissor-type amplification mechanism |
| CN117604881A (en) * | 2024-01-12 | 2024-02-27 | 西安建筑科技大学 | A bridge toughness shock-absorbing limiting device |
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| CN119434081A (en) * | 2024-11-25 | 2025-02-14 | 江南大学 | Energy-consuming self-resetting device for preventing longitudinal bridge beam from falling and manufacturing method thereof |
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| CN121575964B (en) * | 2026-01-27 | 2026-04-21 | 西安石油大学 | Open arrangement and frame of self-resetting dampers |
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Effective date of registration: 20240718 Address after: 230000 B-1015, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee after: HEFEI MINGLONG ELECTRONIC TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 100124 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee before: Beijing University of Technology Country or region before: China |