CN101429788A

CN101429788A - Shape memory alloy damper

Info

Publication number: CN101429788A
Application number: CNA200810137193XA
Authority: CN
Inventors: 李惠; 毛晨曦; 欧进萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-26
Filing date: 2008-09-26
Publication date: 2009-05-13
Anticipated expiration: 2028-09-26
Also published as: CN101429788B

Abstract

The invention provides a shape memory alloy damper, which is made of novel shape memory alloy micro-spring friction damping materials, wherein the novel damping materials are formed by winding, weaving and punch forming of fine austenite shape memory alloy wires, and have the characteristics of large deformability and large energy consumption capability. The shape memory alloy damper which is made of the shape memory alloy micro-spring friction damping materials can be arranged on an interlaminated inclined strut of a multi-story or highrise building structure and used as a driven damper, reduces the reaction of the building structure under the action of earthquake, and protects structural members from being damaged. Compared with the prior driven damper, the novel shape memory alloy damper has the advantage of automatic restoration after being deformed after earthquake, so that the damper is not required for maintenance and replacement after the earthquake and the maintenance expense of a driven energy-consuming damping system in the structure is greatly saved.

Description

Marmem damper

(1) technical field

The present invention relates to building, building field, is exactly a kind of marmem damper specifically.

(2) background technology

The modern city earthquake disaster has the huge characteristics of economic loss, and this mainly is because along with development economic and society, the quantity and the scale in city constantly enlarge, and become area densely-populated, the wealth high concentration, in case just suffered heavy losses by heavy losses.In nearly 20 years, occur in the violent earthquake of area of concentration, city all over the world as everyone knows, the economic loss after its shake is all easily with 10,000,000,000 dollars of calculating.For example, U.S. Loma Prieta M7.1 level in 1989 earthquake, 15,000,000,000 dollars of economic losses; U.S. Northridge M6.7 level in 1994 earthquake, economic loss reaches 20,000,000,000 dollars; The refreshing M7.1 level earthquake economic loss of the Japanese slope of nineteen ninety-five has then reached record-breaking 1,000 hundred million dollars.Yet often be that the repair and reconstruction expense of urban infrastructure is more huge after all previous earthquake, and the reconstruction course is very very long by what people ignored.The collection collection earthquake that occurs in China Taiwan with on September 21st, 1999 is an example, about 9,200,000,000 dollars of the economic loss in the earthquake, but be used for after its earthquake that infrastructure is rebuild and the expense of repairing is roughly equal to 10,200,000,000 dollars.8.0 grades of special violent earthquakes that on May 12nd, 2008 took place in Wenchuan, China Sichuan, direct economic loss reaches 8,451 hundred million RMB, though reconstruction after the earthquake and rehabilitation expense are not also added up up to now, can predict it and will far surpass the direct economic loss that earthquake cause.Therefore, the earthquake engineering research person of countries in the world recognizes at present, only guarantee that building structure do not collapse in earthquake, support personnel's life security is not enough, also should alleviate the damage (as the crack of member, non-response plastic strain) of the not reversibility of building structure (comprising structural element and non-structural element) after earthquake as far as possible, make the city after earthquake, can recover every function rapidly, reduce the huge economic loss that earthquake causes.

Only rely on traditional seismic design of structures thought, promptly utilize intensity, rigidity and the ductility (being plastic strain) of structural element itself to resist geological process, dissipation seismic energy, be difficult to realize above-mentioned antidetonation target.This is that many experts and scholars carry out the common recognition that the disaster inquiry agency draws to a large amount of building structure in earthquake region behind the Wenchuan earthquake in this year 5.12.Promptly in strict accordance with building aseismicity standard design with in strict accordance with the building structure of shockproof requirements construction, can guarantee in earthquake, not take place heavy damage, even can guarantee agent structure member intact substantially (except the earthquake centre), but the damage of non-structural element is general (as a large amount of infilled walls, crack and curtain wall fragmentation appear in non) extremely.Though can continue fully to use by repairing behind these structural earthquakes, the expense of repairing is very huge.Address this problem and have only by additional energy-consumption shock-absorption device is installed in building structure; the seismic energy that structure is suffered in earthquake dissipates by damping device; the distortion of structure also concentrates in the damping device, thereby the plasticity damage does not take place for the structural element of protection main building and non-structural element.The notion of the structural vibration control that Here it is American scholar J.T.P.Yao at first proposed in 1972.At present, the vibration isolation strategy of civil engineering structure under geological process mainly can be divided into ACTIVE CONTROL, Passive Control, half ACTIVE CONTROL, Based Intelligent Control and mixing and control five classes, and Passive Control be study at present and use mature technique the most.The construction and installation of thousands of buildings have been had various types of passive energy dissipation devices (being the passive damping device) by the present whole world; in order to control with reduce the damage of structure under geological process; wherein some building has been passed through the check of actual earthquake, proves that these are installed in structural passive damping device and have the effect that well reduces earthquake damage, protection agent structure really.But the ripe a few class passive damping devices of exploitation all have a common shortcoming at present, exactly because the seismic energy that need dissipate by the distortion of damper, therefore all there is permanent set (even under small earthquake) in damper after the earthquake, have to after the earthquake damper is keeped in repair and changes, the expense of bringing thus is also very huge.Therefore the distortion that has of development of new automatically replies function, has the damper of fine energy dissipation capacity simultaneously again, exempts after the earthquake owing to change the enormous expenditure that damper brings, and is very necessary beyond doubt, and will have fabulous future in engineering applications.

Marmem is researched and developed the ideal material of the novel damper with above-mentioned objective function just.Marmem is a kind of new function material with multiple special mechanical property.The marmem that is in austenitic state has super elastic characteristics, and promptly when its maximum strain was no more than 8%, material deformation can automatically reply fully, did not produce permanent set, and this is unthinkable for ordinary metallic material.In the process of marmem generation distortion and deformation-recovery, also has certain energy dissipation capacity simultaneously.Marmem is used to research as the passive damping device in the building structure since earlier 1990s, has obtained certain academic research achievement up till now, and architecturally in gondola Building two has carried out actual application.But compare with the damper of other types,, simultaneously the little weakness of energy dissipation capacity is arranged again, influenced it and applied on a large scale though marmem damper has the advantage that distortion can automatically reply.Therefore research and develop novel marmem damper, keep its distortion from the advantage of replying, improve the energy dissipation capacity of damper by the mode of utilizing that changes material simultaneously, be to alleviate building structure under geological process, to damage, reduce repair structure itself after the earthquake or repair, change the effective scheme of damper expense.

(3), summary of the invention

But the object of the present invention is to provide a kind of distortion recovery function that both had, have the novel marmem damper of fine energy dissipation capacity again.

The object of the present invention is achieved like this:

Marmem damper of the present invention, its preparation method is as follows:

(1) diameter range is twined on Wiring apparatus to the austenite shape memory alloy filament between the 0.3mm at 0.1mm makes coil;

(2) coil of making is stretched, make every circle coil have uniform pitch;

(3) coil after will stretching is according to size and the loading characteristic of intending the processing damper, along Die and mould plate laterally, vertically or in length and breadth to the mode of combination weave, laying, obtain the blank of marmem Microspring frictional damping material;

(4) blank to marmem Microspring frictional damping material carries out cold stamping, forms marmem Microspring frictional damping material;

(5) marmem Microspring frictional damping material is installed in the damper, as core power consumption parts;

(6) damper is installed on the interlayer diagonal brace of multilayer or highrise building.

Marmem damper of the present invention can help structure dissipation seismic energy in earthquake, reduce structural seismic response, and the protection structural element does not damage.After earthquake, because marmem has super elastic characteristics, the distortion of damper will automatically reply, and not need any maintenance and replacement, can save the maintenance cost of damper greatly.

(4), description of drawings

Fig. 1 is that the marmem spiral winding twines schematic diagram;

Fig. 2 is a marmem Microspring frictional damping material braiding template schematic diagram;

Fig. 3 is a marmem Microspring frictional damping material weaving method schematic diagram;

Fig. 4 is a marmem Microspring frictional damping material blank schematic diagram;

Fig. 5 is the marmem damper organigram;

Fig. 6 is the mounting method schematic diagram of marmem damper in structure.

(5), the specific embodiment

The present invention will be further described for example below in conjunction with accompanying drawing.

Embodiment 1, in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, and Fig. 5, Fig. 6, the preparation process of marmem Microspring frictional damping material of the present invention is as follows:

(1) selects the austenite shape memory alloy filament of diameter range at 0.1--0.3mm, on special winding equipment, spiral winding is made in the winding of marmem filament then, coil diameter is controlled at 5--15 times of alloy silk footpath, so that can having preferably between the assurance spiral winding, engagement is hooked together, then even extension helical coil makes helical pitch equal coil diameter.

(2), select for use appropriate template to carry out the braiding of marmem Microspring frictional damping material according to the size of preprocessing damper.Template is a plank, is covered with the nail of equidistant arrangement on it, and nail span is 5--15 times (Fig. 2) of spiral winding external diameter.Catch on spiral winding with a crochet hook, and between each row's nail, weave according to certain rule.During braiding sma coil one end that stretches is fixed on the nail-plate initial first and ranked first on the nail, and be wrapped in turn on first each nail of row, around each nail, just formed tubular shape memorial alloy spiral winding like this; Carry out the interlacing (Fig. 3) of rule since second row's nail, pass front-seat established coil and hook the marmem helix with crochet hook, the drag hook pin makes the marmem helix pass coil backward and is hung on the corresponding nail of back row, also form tubular shape memorial alloy spiral winding around the row's nail of back, and the front and back coil intersects.So repeated overlapping braiding is until forming the plane net with certain area.

(3), before unloading plane net, the edge of net is sewed up, and with a block pressur plate compacting, making respectively is hooked together meshes between coil with same marmem helix from nail-plate for preventing the distortion of above-mentioned plane net;

(4) plane net that several are woven is superimposed together, and uses the pressing plate compacting, makes fine engagement between each layer plane net.Several plane nets that subsequently this meshed together are rolled with a mould plug, make the element blank, blank are carried out cold stamping shapedly under 10--40MPa pressure, make circular marmem Microspring frictional damping material (Fig. 4).This material internal is the countless Microsprings that are entwined by the super-elastic shape memory alloy filament, and pushes mutually, rubs between each Microspring, makes material have good damping characteristic.

Embodiment 2, in conjunction with Fig. 5, Fig. 6, adopt electric pulse technology, and two ends up and down and two block plates of embodiment 1 described tubular shape memorial alloy Microspring frictional damping material are welded together the formation marmem damper.This damper is installed at the bottom of the beam of many, each layer of highrise building and between this layer cockermegs.In earthquake, pass through the shear strain dissipation seismic energy of marmem Microspring frictional damping material in the damper.Because the austenite shape memory alloy material has super elastic characteristics, therefore the distortion at the earthquake rear damper also can automatically reply, and does not need damper is repaired and changed simultaneously.

Claims

1. marmem damper, its preparation method is as follows:

(2) coil of making is stretched, make every circle coil have uniform pitch;