CN102635176B - Shearing and bending combined type staged yield mild steel damper - Google Patents
Shearing and bending combined type staged yield mild steel damper Download PDFInfo
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Abstract
The invention discloses a shear bending combined type staged yield mild steel damper, which comprises two L-shaped side steel plates (1) symmetrically arranged at the original point, wherein two ends of an X-shaped mild steel energy consumption steel sheet (2) are respectively and vertically welded and connected with a connecting plate (3) of two X-shaped mild steel energy consumption steel sheets arranged in parallel to form an X-shaped steel sheet energy consumption assembly (7); the rib wall of the rectangular soft steel energy dissipation steel sheet (4) is vertically welded and connected with the rectangular steel sheet stiffening plate (6), and the upper end and the lower end of the rectangular soft steel energy dissipation steel sheet (4) are respectively and vertically welded and connected with the connecting plates (5) of the two rectangular soft steel energy dissipation steel sheets arranged in parallel to form a rectangular steel sheet energy dissipation assembly (8); the X-shaped steel sheet energy dissipation assembly (7) and the rectangular steel sheet energy dissipation assembly (8) are arranged in parallel in a cavity formed by the L-shaped side steel plates (1) and are fixedly connected with the vertical surfaces of the L-shaped side steel plates (1) through high-strength bolts respectively. The invention has the advantages of simple structure, strong energy consumption capability, good staged energy consumption effect and wide application range.
Description
Technical field
The present invention relates to civil engineering antidetonation and damping field, relate in particular to the metal energy-dissipation damper in structure passive energy dissipation control system, specifically a kind of combined mild steel damper of surrendering stage by stage of shear-bow that can provide additional damping ratio for building structure, reduce structural seismic response.
Background technology
Metal energy-dissipation damper is to utilize metal material to enter hysteretic energy after plastic range.Because the metal material such as mild steel, lead, shape memory metal have good ductility and hysteresis ability, thereby be widely used for manufacturing various types of dampers.From stress form, can be divided into axial surrender type, shear yielding type, crooked surrender type and torque yield type damper.More and the representative damper product of application has at present: X-type and triangle damper, shearing-type mild steel damper, torsion beam energy consumer, bent beam energy consumer, the capable steel plate damper of U, rod iron energy consumer, annulus, two Behavior of Circular Ring Energy Dissipator, the Behavior of Circular Ring Energy Dissipator etc. of putting more energy into.With respect to other dampers such as oil damper, viscoelastic damper and viscous damping devices, metal damper has easy processing, easy-maintaining replacing, cheap, energy dissipation capacity is stablized, be subject to temperature and external environment to affect the plurality of advantages such as little, is therefore widely used in the seismic hardening of newly-built concrete structure, steel work or old building.
The current existing damper form that mostly consumes energy is single, the requirement in the time of cannot simultaneously meeting little shake and large shake.Many dampers only work under large shake, and during little shake, in elastic stage, seismic energy is dissipated by agent structure, has caused damage to a certain degree; Other damper yield displacement is less, and in the time of can meeting little shake, just surrender power consumption, also has good ductility while shaking greatly, can reach the requirement of large shake power consumption, but it is larger that this class damper often adds to the rigidity of structure, and then cause the increase of geological process, this is a vicious circle.On the other hand, during the little shake of damper, just enter plastic strain, not experiencing large shake needs whole replacings, and economy is poor.And earthquake is generally accompanied by the seismic sequence of principal earthquake, aftershock or group's shake, and aftershock occurs after mostly following principal earthquake closely soon, and aftershock earthquake magnitude is often larger, and perdurabgility is long, therefore the damper of research and development multistage power consumption becomes the task of top priority.
Summary of the invention
The object of the invention is for the single shortcoming of existing metal energy-dissipation damper ubiquity power consumption level, proposed a kind ofly can realize according to the size of seismic energy the combined mild steel damper of surrendering stage by stage of shear-bow of different yield situations.
The object of the invention is to solve by the following technical programs:
The combined mild steel damper of surrendering stage by stage of a kind of shear-bow, comprise junction plate, the rectangle mild-steel energy-consumption steel disc of two blocks of L shaped side steel plates, X-shaped mild-steel energy-consumption steel disc, X-shaped mild-steel energy-consumption steel disc, junction plate and the rectangle steel disc stiffener of rectangle mild-steel energy-consumption steel disc, it is characterized in that two blocks of described L shaped side steel plates are origin symmetry setting, after the junction plate vertical welding of the X-shaped mild-steel energy-consumption steel disc that the two ends of X-shaped mild-steel energy-consumption steel disc be arranged in parallel with two is respectively connected, form X-shaped steel disc power consumption assembly; After the rib wall of rectangle mild-steel energy-consumption steel disc is connected with rectangle steel disc stiffener vertical welding and the junction plate vertical welding of the rectangle mild-steel energy-consumption steel disc that the top and bottom of rectangle mild-steel energy-consumption steel disc be arranged in parallel with two is respectively connected, form rectangle steel disc power consumption assembly; X-shaped steel disc power consumption assembly and rectangle steel disc power consumption assembly be arranged side by side in the cavity forming at L shaped side steel plate and respectively the vertical plane by high-strength bolt and L shaped side steel plate be fixedly linked.
Described X-shaped steel disc power consumption assembly and rectangle steel disc power consumption assembly are arranged side by side along the horizontal direction of L shaped side steel plate vertical plane.
The junction plate of the X-shaped mild-steel energy-consumption steel disc at described X-shaped steel disc power consumption assembly two ends is fixedly linked by the upright side walls of high-strength bolt and L shaped side steel plate.
The junction plate of the rectangle mild-steel energy-consumption steel disc at described rectangle steel disc power consumption assembly two ends is fixedly linked by the upright side walls of high-strength bolt and L shaped side steel plate.
Described X-shaped mild-steel energy-consumption steel disc is vertically distributed between the junction plate of two X-shaped mild-steel energy-consumption steel discs.
Described X-shaped mild-steel energy-consumption steel disc is flexure type mild-steel energy-consumption steel disc, and rectangle mild-steel energy-consumption steel disc is shearing-type mild-steel energy-consumption steel disc; Described X-shaped mild-steel energy-consumption steel disc and rectangle mild-steel energy-consumption steel disc adopt the Low Yield Point Steel of yield strength between 100MPa-225MPa to make.
The steel that the junction plate of described L shaped side steel plate, the junction plate of X-shaped mild-steel energy-consumption steel disc, rectangle mild-steel energy-consumption steel disc and rectangle steel disc stiffener adopt yield strength to be not less than 235MPa are made.
The horizontal plane of described L shaped side steel plate is connected with building structure by high-strength bolt.
The present invention has the following advantages compared to existing technology:
The present invention is arranged in the cavity that L shaped side steel plate forms by adopting the mild-steel energy-consumption steel disc of two kinds of difformities and power consumption mode to be assembled into X-shaped steel disc power consumption assembly and rectangle steel disc power consumption assembly, wherein the rectangle mild-steel energy-consumption steel disc yield displacement of shearing-type is little, initial stiffness is large, energy dissipation capacity is strong, and the yield displacement of the X-shaped mild-steel energy-consumption steel disc of flexure type compared with large, initial stiffness is little, extreme displacement is large; While making little wind or little shake, the very little displacement of rectangle mild-steel energy-consumption steel disc experience enters plasticity power consumption, X-shaped mild-steel energy-consumption steel disc is in elastic stage, during the large shake of strong wind, X-shaped mild-steel energy-consumption steel disc starts surrender, jointly consume energy with the rectangle mild-steel energy-consumption steel disc of shearing-type, thereby realize the effect of the surrender power consumption stage by stage of damper, and the large feature of X-shaped mild-steel energy-consumption steel disc extreme displacement makes damper have stronger safety stock.
The present invention efficiently solves tradition and shears or the single shortcoming of curved damper damping level, and simple in structure, low cost of manufacture, be easy to install change, space occupancy is little, less to function and the appearance effects of building, and have energy dissipation capacity by force, the feature of good, the good endurance of energy consumption effect stage by stage.
The present invention, in actual engineering design, can produce by adjusting the parameters such as size of quantity, ratio, physical dimension, material and the side plate of two kinds of mild-steel energy-consumption steel discs the damper of the mechanical property parameters such as different initial stiffnesses, initial yield displacement, the second yield displacement and energy dissipation capacity.
Accompanying drawing explanation
Accompanying drawing 1 is damper perspective view of the present invention;
Accompanying drawing 2 is damper internal placement schematic diagram of the present invention;
Accompanying drawing 3 is X-shaped steel disc power consumption modular construction schematic diagram of the present invention;
Accompanying drawing 4 is rectangle steel disc power consumption modular construction schematic diagram of the present invention;
Accompanying drawing 5 is damper installation structure floor map of the present invention;
Accompanying drawing 6 carries out for damper of the present invention the hysteresis loop figure obtaining after key property loading test;
The key property numerical simulation that accompanying drawing 7 is damper of the present invention and loading test hysteresis loop comparison diagram;
Accompanying drawing 8 carries out for damper of the present invention the hysteresis loop figure obtaining after fatigue behaviour loading test;
Accompanying drawing 9 is the schematic diagram that in the middle of damper of the present invention adopts in building structure, column type is installed;
The schematic diagram that accompanying drawing 10 adopts support type to install for damper of the present invention in building structure.
Wherein: 1-L shaped side steel plate; 2-X-shaped mild-steel energy-consumption steel disc; The junction plate of 3-X-shaped mild-steel energy-consumption steel disc; 4-rectangle mild-steel energy-consumption steel disc; The junction plate of 5-rectangle mild-steel energy-consumption steel disc; 6-rectangle steel disc stiffener; 7-X-shaped steel disc power consumption assembly; 8-rectangle steel disc power consumption assembly.
The specific embodiment
As Figure 1-5: the combined mild steel damper of surrendering stage by stage of a kind of shear-bow, comprise two blocks of L shaped side steel plates 1, X-shaped mild-steel energy-consumption steel disc 2, the junction plate 3 of X-shaped mild-steel energy-consumption steel disc, rectangle mild-steel energy-consumption steel disc 4, the junction plate 5 of rectangle mild-steel energy-consumption steel disc and rectangle steel disc stiffener 6, wherein two blocks of L shaped side steel plates 1 are origin symmetry and arrange and form a frame construction, junction plate 3 vertical weldings of the X-shaped mild-steel energy-consumption steel disc that the two ends of X-shaped mild-steel energy-consumption steel disc 2 be arranged in parallel with two are respectively connected, X-shaped mild-steel energy-consumption steel disc 2 is vertically distributed between the junction plate 3 of two X-shaped mild-steel energy-consumption steel discs and the junction plate 3 of a plurality of X-shaped mild-steel energy-consumption steel disc 2 and two X-shaped mild-steel energy-consumption steel discs forms an X-shaped steel disc power consumption assembly 7, after the rib wall of rectangle mild-steel energy-consumption steel disc 4 is connected with rectangle steel disc stiffener 6 vertical weldings and junction plate 5 vertical weldings of the rectangle mild-steel energy-consumption steel disc that the top and bottom of rectangle mild-steel energy-consumption steel disc 4 be arranged in parallel with two are respectively connected, form rectangle steel disc power consumption assembly 8, wherein conventionally adopt a rectangle mild-steel energy-consumption steel disc 4, the junction plate 5 of two rectangle steel disc stiffeners 6 and two rectangle mild-steel energy-consumption steel discs forms a rectangle steel disc power consumption assembly 8, but also can use a rectangle mild-steel energy-consumption steel disc 4, the junction plate 5 of a rectangle steel disc stiffener 6 and two rectangle mild-steel energy-consumption steel discs forms a rectangle steel disc power consumption assembly 8, X-shaped steel disc power consumption assembly 7 and rectangle steel disc power consumption assembly 8 along the horizontal direction of L shaped side steel plate 1 vertical plane be arranged side by side in the cavity forming at L shaped side steel plate 1 and respectively the vertical plane by high-strength bolt and L shaped side steel plate 1 be fixedly linked, be that the junction plate 3 of X-shaped mild-steel energy-consumption steel disc at the X-shaped steel disc power consumption assembly 7 two ends upright side walls by high-strength bolt and L shaped side steel plate 1 is fixedly linked, the junction plate 5 of the rectangle mild-steel energy-consumption steel disc at rectangle steel disc power consumption assembly 8 two ends is fixedly linked by the upright side walls of high-strength bolt and L shaped side steel plate 1, wherein the quantity of X-shaped steel disc power consumption assembly 7 and rectangle steel disc power consumption assembly 8 can need to be selected according to actual engineering design, the horizontal plane of L shaped side steel plate 1 is connected with building structure by high-strength bolt.
The combined mild steel damper of surrendering stage by stage of shear-bow of the present invention belongs to displacement type damper, is to rely on mild steel material to surrender under external force to enter plastic state constantly to absorb energy.In order to guarantee that damper can enter duty as early as possible, protect to a greater degree agent structure, the yield strength of power consumption material is unsuitable too high, and still can normally work the in the situation that of larger displacement for guaranteeing damper, be unlikely to occur ductile fracture or low-cycle fatigue failure, require power consumption material will have larger ductility, so X-shaped mild-steel energy-consumption steel disc 2 and rectangle mild-steel energy-consumption steel disc 4 all adopt the low-yield mild steel material of yield strength between 100MPa-225MPa to make, its physical dimension should require to determine according to the physical dimension in actual damping scheme and power consumption.X-shaped mild-steel energy-consumption steel disc in damper 2 adopts flexure type mild-steel energy-consumption steel disc simultaneously, with flexural deformation form reciprocal outside the plane of steel disc, carrys out consumed energy; Rectangle mild-steel energy-consumption steel disc 4 adopts shear energy dissipation shaped steel sheet, with reciprocal shearing motion in the plane of steel disc, carrys out consumed energy.Two kinds of power consumption steel discs, in reciprocating motion situation, all can be subject to the vertical power of steel disc and moment of flexure, and vertical height changes, and this can weaken the energy dissipation capacity of steel disc greatly; Wherein rectangle steel disc stiffener 6 will be protected the uniformity of rectangle mild-steel energy-consumption steel disc 4 in vertical strain, otherwise rectangle mild-steel energy-consumption steel disc 4 is when large displacement, and both ends there will be stress to concentrate, and are greatly unfavorable for power consumption.In addition for guaranteeing L shaped side steel plate 1, the junction plate 3 of X-shaped mild-steel energy-consumption steel disc, the junction plate 5 of rectangle mild-steel energy-consumption steel disc and rectangle steel disc stiffener 6 keep stable under large shake, therefore the steel that all adopt yield strength to be not less than 235MPa are made, and have certain thickness.In actual engineering design, can produce by adjusting the parameters such as size of quantity, ratio, physical dimension, material and the side plate of two kinds of mild-steel energy-consumption steel discs the damper of the mechanical property parameters such as different initial stiffnesses, initial yield displacement, the second yield displacement and energy dissipation capacity.
Below by basic performance tests and experiment on fatigue properties, draw the power of this damper and the hysteresis loop of displacement relation and tired displacement course, determine its fatigue life.Test adopts 16 X-shaped mild-steel energy- consumption steel discs 2 and 4, two kinds of steel discs of a rectangle mild-steel energy-consumption steel disc all to adopt the high-performance low-yield mild steel JIS LY225 of Japanese import to make; Other member adopts Q235 steel to do, wherein the junction plate 3 of every four X-shaped mild-steel energy-consumption steel discs 2 and two X-shaped mild-steel energy-consumption steel discs forms an X-shaped steel disc power consumption assembly 7, each rectangle steel disc power consumption assembly 8 consists of junction plate 5 and two rectangle steel disc stiffeners 6 of a rectangle mild-steel energy-consumption steel disc 4, two rectangle mild-steel energy-consumption steel discs, and then four X-shaped steel disc power consumption assemblies 7 and a rectangle steel disc power consumption assembly 8 are bolted to connection the combined mild steel damper of surrendering stage by stage of formation one shear-bow set forth in the present invention with two blocks of L shaped side steel plates 1.Wherein the size of each parts is as shown in table 1.
Each part dimension (unit: mm) of table 1 damper
| Classification | Bottom width b | Steel disc height h | Steel plate thickness t | Neck width a |
| L shaped side steel plate | 500 | 900 | 45 | / |
| X-shaped mild-steel energy-consumption steel disc | 120 | 200 | 9 | 30 |
| The junction plate of X-shaped mild-steel energy-consumption steel disc | 150 | 320 | 20 | / |
| Rectangle mild-steel energy-consumption steel disc | 80 | 200 | 6 | / |
| The junction plate of rectangle mild-steel energy-consumption steel disc | 120 | 150 | 20 | / |
| Rectangle steel disc stiffener | 76 | 200 | 12 | / |
Because testing equipment is the vertical mode loading, this test intended adopts longitudinal Vertical loading mode, above-mentioned damper is longitudinally placed on charger, the L shaped side steel plate 1 of this damper top and bottom is fixedly linked by bolt and charger respectively, with this, detects the energy-dissipating property of damper.
One, key property loading test
This damper, in process of the test, controls to realize loading procedure with displacement, and it is as shown in table 2 that concrete test loads system.
Table 2 damper low cycle repetitive load performance test loads system
| Loading sequence | Frequency (Hz) | Displacement (mm) | Back and forth load number of times | Horizontal | Load waveform | |
| 1 | 0.05 | 0.1 | 2 | Constant | |
|
| 2 | 0.05 | 0.2 | 2 | Constant | |
|
| 3 | 0.05 | 0.4 | 2 | Constant | |
|
| 4 | 0.05 | 0.5 | 2 | Constant | |
|
| 5 | 0.05 | 0.75 | 2 | Constant | |
|
| 6 | 0.05 | 1 | 2 | Constant | |
|
| 7 | 0.05 | 1.25 | 2 | Constant | Triangular wave | |
| 8 | 0.05 | 1.5 | 2 | Constant | Triangular wave | |
| 9 | 0.05 | 1.75 | 2 | Constant | |
|
| 10 | 0.05 | 2 | 2 | Constant | Triangular wave | |
| 11 | 0.05 | 2.25 | 2 | Constant | Triangular wave | |
| 12 | 0.05 | 2.5 | 2 | Constant | Triangular wave | |
| 13 | 0.05 | 2.75 | 2 | Constant | Triangular wave | |
| 14 | 0.05 | 3 | 2 | Constant | |
|
| 15 | 0.05 | 4.5 | 2 | Constant | |
|
| 16 | 0.05 | 6 | 2 | Constant | Triangular wave | |
| 17 | 0.05 | 9 | 2 | Constant | Triangular wave | |
| 18 | 0.05 | 12 | 2 | Constant | Triangular wave | |
| 19 | 0.05 | 18 | 2 | Constant | |
|
| 20 | 0.05 | 24 | 2 | Constant | Triangular wave | |
| 21 | 0.05 | 30 | 2 | Constant | Triangular wave |
As shown in Figure 6, as seen from Figure 6, the hysteresis loop of this damper basic performance tests is spindle to the damper key property hysteresis loop that above-mentioned test obtains afterwards generally, and shape is full, power consumption is stable.When load deflection is very little, shearing-type energy-consumption steel disc is surrendered, and starts power consumption; Displacement continues to increase, and flexure type X-shaped steel disc starts to enter surrender power consumption state, and final two kinds of mild steel steel discs are all surrendered, the whole power consumption of damper.And the tri linear type that the skeleton curve of damper is standard, yield phenomenon is very obvious stage by stage, show that the combined mild steel damper of surrendering stage by stage of this shear-bow can well realize stage by stage power consumption, and energy dissipation capacity is stronger.All steel disc necks or root all do not occur that crackle or stress are concentrated, large strain produces steel disc distortion and destroys simultaneously, and weld seam is all right, has no the phenomenons such as fracture sealing-off, and damper is the state in safety all the time.
In addition the key property of damper of the present invention is carried out to numerical simulation, the hysteresis loop that key property numerical simulation and loading test obtain as shown in Figure 7, wherein grey lines represent the hysteresis loop that numerical simulation obtains, and black lines represents the hysteresis loop that loading test obtains.To after the result contrast of numerical simulation and loading test, find, both hysteresis loops are very approaching, and skeleton curve is tri linear type, and the restoring force model of having verified this damper is three linear models; Wherein the first rigidity of the first ratio of rigidity trial curve of numerical simulation curve is slightly large, the first yield displacement of testing gained is slightly larger than numerical simulation, and this is by the wood property of actual mild-steel energy-consumption steel disc, to exist slight error to cause due to mild-steel energy-consumption steel disc strain-stress relation and loading test that numerical simulation adopts; But the goodness of fit is higher for the parameters such as characteristic point of ultimate load, the second rigidity, the 3rd rigidity and surrender stage by stage, illustrates that this damper can meet practical engineering application demand completely; The strain hardening phenomenon that while oppositely loading, damper shows simultaneously is also simulated very precisely, and the energy dissipation capacity of damper (being the area of hysteretic loop) compare error is in 10%.Contrast by key property numerical simulation and loading test can show that the energy consumption effect stage by stage of this damper is obvious equally, and energy dissipation capacity is stronger.
Two, fatigue behaviour loading test
In fatigue behaviour loading test process, applying 60 circle design displacement amplitudes to this damper is 12mm, frequency is the fatigue behaviour of the fixed displacement triangular wave test damper of 0.05 Hz, the damper key property hysteresis loop that above-mentioned test obtains afterwards as shown in Figure 8, as seen from Figure 8, under the design displacement amplitude of 12mm, reciprocation cycle loads after 60 circles, there is not obvious bending or shear failure in the power consumption steel disc of damper, hysteresis loop is not obviously distortion also, hysteretic loop be energy dissipation capacity and surrender bearing capacity attenuation all lower than 15%, displacement course accumulative total reaches 3613mm, there is not obvious low-cycle fatigue phenomenon in damper.The stable mechanical property that shows this damper, energy-dissipating property is good, has reached the requirement of earthquake resistant code regulation.
Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.
When in the middle of the present invention adopts, column type is arranged in building structure, as shown in Figure 9, the combined mild steel damper of surrendering stage by stage of several shear-bows is combined, and is arranged in the agent structure of building.The top girder of the top levels of L shaped side steel plate 1 that shear-bow is combined surrenders mild steel damper top stage by stage by high-strength bolt and floor is connected, and the wall type of the bottom water plane of the L shaped side steel plate 1 of bottom by high-strength bolt and floor bottom supports and be fixedly linked.When there is earthquake, between two L shaped side steel plates 1 in each damper, produce relative displacement, under little shake because the yield displacement of rectangle mild-steel energy-consumption steel disc 4 is less, when very little displacement, first rectangle mild-steel energy-consumption steel disc 4 starts to enter plastic deformation energy dissipation, and X-shaped mild-steel energy-consumption steel disc 2 is still in elastic stage, this is first stage surrender power consumption, the seismic energy in the time of can dissipating little shake; When middle shake is shaken greatly, the relative displacement of two L shaped side steel plates 1 in each damper is larger, when reaching the yield displacement of X-shaped mild-steel energy-consumption steel disc 2, X-shaped mild-steel energy-consumption steel disc 2 enters power consumption state and rectangle mild-steel energy-consumption steel disc 4 co-operation, dissipation seismic energy, this is second stage surrender power consumption.The quantity of X-shaped mild-steel energy-consumption steel disc 2 is relatively many in actual use, as power consumption deposit, when shaking greatly, consumes more energy, finally protects the object of agent structure safety.
When the present invention adopts support type to be arranged in building structure, as shown in figure 10, the combined mild steel damper of surrendering stage by stage of several shear-bows is combined, and is arranged in the agent structure of building.The top girder of the top levels of L shaped side steel plate 1 that shear-bow is combined surrenders mild steel damper top stage by stage by high-strength bolt and floor is connected, the bottom water plane of the L shaped side steel plate 1 of bottom is supported and is fixedly linked by the herringbone steel arranging on high-strength bolt and floor bottom girder, supports the fixedly effect of damper of playing.When there is earthquake, between two L shaped side steel plates 1 in each damper, produce relative displacement, under little shake because the yield displacement of rectangle mild-steel energy-consumption steel disc 4 is less, when very little displacement, first rectangle mild-steel energy-consumption steel disc 4 starts to enter plastic deformation energy dissipation, and X-shaped mild-steel energy-consumption steel disc 2 is still in elastic stage, this is first stage surrender power consumption, the seismic energy in the time of can dissipating little shake; When middle shake is shaken greatly, the relative displacement of two L shaped side steel plates 1 in each damper is larger, when reaching the yield displacement of X-shaped mild-steel energy-consumption steel disc 2, X-shaped mild-steel energy-consumption steel disc 2 enters power consumption state and rectangle mild-steel energy-consumption steel disc 4 co-operation, dissipation seismic energy, this is second stage surrender power consumption.The quantity of X-shaped mild-steel energy-consumption steel disc 2 is relatively many in actual use, as power consumption deposit, when shaking greatly, consumes more energy, finally protects the object of agent structure safety.
The present invention is arranged in the cavity that L shaped side steel plate 1 forms by adopting the mild-steel energy-consumption steel disc of two kinds of difformities and power consumption mode to be assembled into X-shaped steel disc power consumption assembly 7 and rectangle steel disc power consumption assembly 8, wherein the yield displacement of the rectangle mild-steel energy-consumption steel disc 4 of shearing-type is little, initial stiffness is large, energy dissipation capacity is strong, and the yield displacement of the X-shaped mild-steel energy-consumption steel disc 2 of flexure type compared with large, initial stiffness is little, extreme displacement is large; While making little wind or little shake, the very little displacement of rectangle mild-steel energy-consumption steel disc 4 experience enters plasticity power consumption, X-shaped mild-steel energy-consumption steel disc 2 is in elastic stage, during the large shake of strong wind, X-shaped mild-steel energy-consumption steel disc 2 starts surrender, jointly consume energy with the rectangle mild-steel energy-consumption steel disc 4 of shearing-type, thereby realize the effect of the surrender power consumption stage by stage of damper, and the large feature of X-shaped mild-steel energy-consumption steel disc 2 extreme displacements makes damper have stronger safety stock.
The present invention compares than traditional single shearing-type mild steel damper or single flexure type X-shaped mild steel damper, the initial stiffness of traditional shearing-type mild steel damper is large, yield displacement is less, during little shake, can consume energy, during large shake, also there is good energy dissipation capacity, but often experience little shake for several times, damper just needs whole replacings, economy is poor, and the ductility of mild steel material has certain limit, the flexure type X-shaped mild steel damper that yield displacement is larger wants the tired effect of shearing-type mild steel damper and displacement course that specific stiffness is larger better, traditional flexure type X-shaped mild steel damper application is comparatively extensive, but it is inoperative to exist in the situation that yield displacement is large little shake, the yield displacement design hour fatigue behaviour of damper reduces greatly, safety stock is not enough, flexure type X-shaped mild-steel energy-consumption steel disc is as reached the just situation of surrender power consumption of less displacement, must X-shaped mild-steel energy-consumption steel disc be designed to highly less, the form that thickness is larger, this design can seriously reduce the fatigue behaviour of X-shaped mild-steel energy-consumption steel disc, affect the safety of damper, even if adopt two kinds of different sizes, the X-shaped mild-steel energy-consumption steel disc of thickness forms grading yield type mild steel damper, aspect safety, still can not be guaranteed.And shear-bow of the present invention is combined, surrender stage by stage two kinds of power consumption steel disc combinations effectively that mild steel damper adopts above-mentioned conventional damper, shearing-type steel disc power consumption while having realized little shake, during large shake, the whole power consumption of damper, makes flexure type steel disc have stronger safety stock; And during experience little shake for several times, need only change the steel disc of shearing-type, maintenance cost is low.Therefore the combined mild steel damper of surrendering stage by stage of shear-bow of the present invention efficiently solves tradition shearing or the single shortcoming of curved damper damping level, and simple in structure, low cost of manufacture, be easy to install change, space occupancy is little, less to function and the appearance effects of building, and have energy dissipation capacity by force, the feature of good, the good endurance of energy consumption effect stage by stage.
The combined mild steel damper of surrendering stage by stage of shear-bow of the present invention can be used in the building of multilayer, Concrete Structures of Tall Building and steel work; be additional to the safety of protecting agent structure in structure as energy-dissipating and shock-absorbing member; this damper both can be used in new construction, can be used for again the seismic hardening transformation of old building.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection domain of the present invention; The technology that the present invention does not relate to all can be realized by prior art.
Claims (8)
1. the combined mild steel damper of surrendering stage by stage of shear-bow, comprise two blocks of L shaped side steel plates (1), X-shaped mild-steel energy-consumption steel disc (2), the junction plate (3) of X-shaped mild-steel energy-consumption steel disc, rectangle mild-steel energy-consumption steel disc (4), the junction plate (5) of rectangle mild-steel energy-consumption steel disc and rectangle steel disc stiffener (6), it is characterized in that described two blocks of L shaped side steel plates (1) are origin symmetry setting, after being connected, junction plate (3) vertical welding of the X-shaped mild-steel energy-consumption steel disc that the two ends of X-shaped mild-steel energy-consumption steel disc (2) be arranged in parallel with two respectively forms X-shaped steel disc power consumption assembly (7), after the rib wall of rectangle mild-steel energy-consumption steel disc (4) is connected with rectangle steel disc stiffener (6) vertical welding and junction plate (5) vertical welding of the rectangle mild-steel energy-consumption steel disc that the top and bottom of rectangle mild-steel energy-consumption steel disc (4) be arranged in parallel with two is respectively connected, form rectangle steel disc power consumption assembly (8), the vertical plane that X-shaped steel disc power consumption assembly (7) and rectangle steel disc power consumption assembly (8) are arranged side by side in the cavity forming at L shaped side steel plate (1) also respectively by high-strength bolt and L shaped side steel plate (1) is fixedly linked.
2. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, is characterized in that described X-shaped steel disc power consumption assembly (7) and rectangle steel disc power consumption assembly (8) are arranged side by side along the horizontal direction of L shaped side steel plate (1) vertical plane.
3. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, the upright side walls of the junction plate (3) of X-shaped mild-steel energy-consumption steel disc that it is characterized in that described X-shaped steel disc power consumption assembly (7) two ends by high-strength bolt and L shaped side steel plate (1) is fixedly linked.
4. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, the upright side walls of the junction plate (5) of rectangle mild-steel energy-consumption steel disc that it is characterized in that described rectangle steel disc power consumption assembly (8) two ends by high-strength bolt and L shaped side steel plate (1) is fixedly linked.
5. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, is characterized in that described X-shaped mild-steel energy-consumption steel disc (2) is vertically distributed between the junction plate (3) of two X-shaped mild-steel energy-consumption steel discs.
6. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, is characterized in that described X-shaped mild-steel energy-consumption steel disc (2) is flexure type mild-steel energy-consumption steel disc, and rectangle mild-steel energy-consumption steel disc (4) is shearing-type mild-steel energy-consumption steel disc; Described X-shaped mild-steel energy-consumption steel disc (2) and rectangle mild-steel energy-consumption steel disc (4) adopt the Low Yield Point Steel of yield strength between 100MPa-225MPa to make.
7. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, is characterized in that the steel that described L shaped side steel plate (1), the junction plate (3) of X-shaped mild-steel energy-consumption steel disc, the junction plate (5) of rectangle mild-steel energy-consumption steel disc and rectangle steel disc stiffener (6) employing yield strength are not less than 235MPa make.
8. the combined mild steel damper of surrendering stage by stage of shear-bow according to claim 1, is characterized in that the horizontal plane of described L shaped side steel plate (1) is connected with building structure by high-strength bolt.
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