CN102400500B - Buckling restrained brace with tension interval protection member - Google Patents
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- CN102400500B CN102400500B CN201110379954.4A CN201110379954A CN102400500B CN 102400500 B CN102400500 B CN 102400500B CN 201110379954 A CN201110379954 A CN 201110379954A CN 102400500 B CN102400500 B CN 102400500B
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Abstract
The invention discloses a buckling restrained brace with a tension interval protection member, which comprises a core stressed member, a buckling restrained member, a left-end connection member and a right-end connection member, wherein the left end of the core stressed member is fixedly connected with the left-end connection member; the right end of the core stressed member is fixedly connected with the right-end connection member; and the surface of the core stressed member is movably wrapped by the buckling restrained member. The buckling restrained brace also comprises the tension interval protection member, wherein the left end of the tension interval protection member is connected with the left-end connection member; the right end of the tension interval protection member is connected with the right-end connection member; and the straight-line length of the tension interval protection member is larger than a distance between the left-end connection member and the right-end connection member. According to the buckling restrained brace, the deformation control performance of the buckling restrained brace in an engineering structure under the action of a huge earthquake can be improved, the buckling restrained brace is prevented from being broken, and the anti-collapse performance of the engineering structure is improved.
Description
Technical field
The invention belongs to field of civil engineering, can be used for new construction or reinforce old structure, specifically, relate to a kind of buckling restrained brace with tension gap protection parts.
Background technology
Under regular service conditions or frequently occurred earthquake effect, buckling restrained brace, as structural element, can provide effective rigidity for structure.Under basic intensity earthquake or rarely occurred earthquake effect, buckling restrained brace will enter yield situation prior to other structure member, by dissipate most of energy of earthquake input of hysteresis, alleviate and even avoid agent structure damage, can be by changing the use function of the fast quick-recovery structure of buckling restrained brace after shake.
Existing buckling restrained brace is made up of core stressed member, buckling-restrained parts, left part link and right part link, the left end of core stressed member is fixedly connected with left part link, the right-hand member of core stressed member is fixedly connected with right part link, the surface of core stressed member is by the removable parcel of buckling-restrained parts, the surface major part that is core stressed member is covered by buckling-restrained parts, and buckling-restrained parts can move on the surface of core stressed member.The basic Force principle of this kind of buckling restrained brace is: under the restriction of buckling-restrained parts, core stressed member in whole loading process all the time in approaching axially loaded state, when pressurized, be many ripples of high-order flexing and significantly low order flexing can not occur, consume under external force the energy of earthquake input structure by tension and compression plastic strain.
Main violent earthquake several times in recent years, as Northridge earthquake in 1994, nineteen ninety-five Japan Kobe earthquake, TaiWan, China Chi-Chi in 1999 earthquake and Wenchuan earthquakes in 2008 etc., the dfisplacement pulse characteristic showing due to earthquake motion or earthquake intensity are much larger than fortification intensity, make engineering structures directly bear high energy impact events, produce the large displacement or the large deformation that surpass the expectation, caused even collapse of structure major injury.
Structure is under super large earthquake (being greater than rarely occurred earthquake earthquake intensity) or impulse type geological process, and buckling restrained brace will be surrendered, thereby utilizes its Hysteresis Behavior dissipation seismic energy, alleviate earthquake disaster.But due to interlayer rigidity rapid drawdown after buckling restrained brace surrender, may form weak floor in relevant position.At this moment the stratified deformation of structure is difficult to control, and by producing larger malformation, even causes structure collapse or topple.Under geological process repeatedly, buckling restrained brace also may rupture because of low-cycle fatigue, and its consequence is more unfavorable.
Summary of the invention
technical problem:technical problem to be solved by this invention is: a kind of buckling restrained brace with tension gap protection parts is provided; improve the Deformation control ability of buckling restrained brace in engineering structures under super large geological process; prevent buckling restrained brace fracture, improve the collapse resistant capacity of engineering structures.
technical scheme:for solving the problems of the technologies described above, a kind of buckling restrained brace with tension gap protection parts of the technical program, comprise core stressed member, buckling-restrained parts, left part link and right part link, the left end of core stressed member is fixedly connected with left part link, the right-hand member of core stressed member is fixedly connected with right part link, the surface of core stressed member is by the removable parcel of buckling-restrained parts, also comprise tension gap protection parts, the left end of these tension gap protection parts is connected with left part link, the right-hand member of tension gap protection parts is connected with right part link, and the straight length of tension gap protection parts is greater than the distance between left part link and right part link.
Further, the described buckling restrained brace with tension gap protection parts, also comprise pressurized gap protection parts, these pressurized gap protection parts are between left part link and right part link, and the length of pressurized gap protection parts is less than the distance between left part link and right part link; Pressurized gap protection parts are fixedly connected with left part link, or are fixedly connected with right part link, or are fixedly connected with buckling-restrained parts.
beneficial effect:compared with prior art, the present invention has following beneficial effect:
1. bear violent earthquake more than expected when structure and do the used time; buckling restrained brace with tension gap protection parts will avoid buckling restrained brace under the state of tension, to produce uncontrollable distortion, collapses thereby avoid the obvious weak floor of structure generation to cause.In the technical program, the straight length of tension gap protection parts is greater than the distance between left part link and right part link, so tension gap protection parts have redundant length.Buckling restrained brace extends, and when relative deformation is less than redundant length, tension gap protection parts do not participate in stressed; When relative deformation is greater than redundant length, tension gap protection parts participate in power transmission.When stretcher strain exceeds redundant length, tension gap protection parts provide part rigidity (when core stressed member works) or whole rigidity (when the fracture of core stressed member is deactivated), thereby reduce the relative stretcher strain in buckling restrained brace two ends.The technical program has been carried out the protection to buckling restrained brace in tension process; improve the Deformation control ability of buckling restrained brace; avoid buckling restrained brace under the state of tension, to produce uncontrollable distortion, collapse thereby avoid the obvious weak floor of structure generation to cause.
2. bear violent earthquake more than expected when structure and do the used time; buckling restrained brace with tension gap protection parts will avoid buckling restrained brace under the state of pressurized, to produce uncontrollable distortion, collapses thereby avoid the obvious weak floor of structure generation to cause.In improvement project, pressurized gap protection parts are added.The length of pressurized gap protection parts is less than the distance between left part link and right part link, and pressurized gap protection parts have certain short length.Do the used time when buckling restrained brace is under pressure, buckling restrained brace shortens, and when relative deformation is less than short length, pressurized gap protection parts do not participate in stressed; When relative deformation is greater than short length, pressurized gap protection parts provide part (when core stressed member works) or whole rigidity (when the fracture of core stressed member is deactivated), thereby reduce the relative compressive strain at buckling restrained brace two ends.Visible, improvement project makes structure in tension and pressurized process, all carry out the protection to buckling restrained brace, has improved the Deformation control ability of buckling restrained brace.Protection can select to be as required subject to pulling force and pressure-acting time, also can only play protection in the tension masterpiece used time.
3. bear violent earthquake more than expected when structure and do the used time; tension gap protection parts or pressurized gap protection parts will significantly reduce the maximum distortion of buckling restrained brace; thereby reduce the plasticity accumulative total distortion of core stressed member, prevent that core stressed member from continuing to produce low-cycle fatigue failure under geological process.
4. when the core stressed member that structure is born violent earthquake effect more, buckling restrained brace experiences large strain repeated action and after rupturing and deactivating; tension gap protection parts and pressurized gap protection parts will be respectively produce at member significantly draw, when compressive strain for structure provides reliable anti-side rigidity; avoid being out of shape unrestricted development, prevent structural collapse.This can be used as the last line of defense that prevents structural collapse.Therefore, the present invention has carried out the protection of two stages to buckling restrained brace, i.e. the deactivate protection in stage of the protection of core stressed member stationary operational phase and core stressed member has improved the Deformation control ability of buckling restrained brace.
5. tension gap protection parts and pressurized gap protection parts are only just worked when special large deformation occurs structure, are conducive to prevent that tension gap protection parts and pressurized gap protection parts are because participation work too early destroys.The short length of the redundant length of tension gap protection parts and pressurized gap protection parts, can guarantee to bear in structure and estimate geological process, the power consumption effect that moderate when distortion makes full use of core stressed member occurs alleviate seismic response.Meanwhile, whole buckling restrained brace is simple in structure, easy to make, is easy to realize.
Accompanying drawing explanation
Fig. 1 is the first structural representation of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the structural representation of improvement project of the present invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the A-A sectional drawing of Fig. 3.
Fig. 6 is the B-B sectional drawing of Fig. 3.
Fig. 7 is the structural representation of the second structure of the present invention in improvement project.
Fig. 8 is the structural representation of the third structure of the present invention in improvement project.
In figure, have: core stressed member 1, buckling-restrained plate 2, buckling-restrained channel-section steel 3, left part link 4, tension gap protection parts 5, pressurized gap protection parts 6, right part link 7, bolt 8, left nut 9, right nut 10, limit spring 11, left securing member 12, right securing member 13.
The specific embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail.
As depicted in figs. 1 and 2, a kind of buckling restrained brace with tension gap protection parts of the present invention, comprises core stressed member 1, buckling-restrained parts, left part link 4, right part link 7 and tension gap protection parts 5.The left end of core stressed member 1 is fixedly connected with left part link 4, and the right-hand member of core stressed member 1 is fixedly connected with right part link 7.The surface of core stressed member 1 is by the removable parcel of buckling-restrained parts, and the surface major part of core stressed member 1 is covered by buckling-restrained parts, and buckling-restrained parts can move freely on the surface of core stressed member 1.In Fig. 1 and Fig. 2, buckling-restrained parts are made up of buckling-restrained plate 2 and buckling-restrained channel-section steel 3.Core stressed member 1 is embedded between buckling-restrained plate 2 and buckling-restrained channel-section steel 3.In addition, buckling-restrained parts can also be made up of other forms according to the shape of core stressed member 1, and this point is known in the art.The left end of tension gap protection parts 5 is connected with left part link 4; the right-hand member of tension gap protection parts 5 is connected with right part link 7, and the straight length of tension gap protection parts 5 is greater than the distance between left part link 4 and right part link 7.Because the straight length of tension gap protection parts 5 is greater than the distance between left part link 4 and right part link 7; so; tension gap protection parts 5 have certain redundant length; be that tension gap protection parts 5 are under stretching state; distance between its two ends, is greater than the distance between left part link 4 and right part link 7.Tension gap protection parts 5 can by modulus of elasticity and higher metal or the nonmetals of tensile strength, for example, adopt high strength cast iron, high strength steel strand and high-strength complex condensating fiber to make.
Adopt the buckling restrained brace with tension gap protection parts 5 of said structure, between left part link 4 and right part link 7, increase and be provided with tension gap protection parts 5.Because the length of tension gap protection parts 5 is greater than the distance between left part link 4 and right part link 7, so tension gap protection parts 5 have redundant length.When buckling restrained brace under tension is done the used time, buckling restrained brace extends, and when relative deformation is less than redundant length, tension gap protection parts 5 do not participate in stressed; When relative deformation is greater than redundant length; tension gap protection parts 5 participate in power transmission; part rigidity (when core stressed member works) or whole rigidity (when the fracture of core stressed member is deactivated) are provided, thereby reduce the relative stretcher strain in buckling restrained brace two ends.The technical program has been carried out the protection to buckling restrained brace in tension process, has improved the Deformation control ability of buckling restrained brace.
As a kind of improvement project, as shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the described buckling restrained brace with tension gap protection parts 5, also comprises pressurized gap protection parts 6.Pressurized gap protection parts 6 have enough compressive strength and anti-flexion capabilities, for example steel pipe, ring-type concrete filled steel tubular member.The shape of pressurized gap protection parts 6 can have multiple, for example rectangle sleeve pipe, circular casing, regular hexagon sleeve pipe.In Fig. 3 and Fig. 4, pressurized gap protection parts 6 are rectangle sleeve pipes.Pressurized gap protection parts 6 are between left part link 4 and right part link 7.The length of pressurized gap protection parts 6 is less than the distance between left part link 4 and right part link 7.Pressurized gap protection parts 6 are fixedly connected with left part link 4, or pressurized gap protection parts 6 are fixedly connected with right part link 7, or pressurized gap protection parts 6 are fixedly connected with buckling-restrained parts.Because the length of pressurized gap protection parts 6 is less than the distance between left part link 4 and right part link 7; when so no matter pressurized gap protection parts 6 and left part link 4 or right part link 7 or buckling-restrained parts are fixedly connected with; between pressurized gap protection parts 6 and left part link 4, or between pressurized gap protection parts 6 and right part link 7, all can leave gap.
In above-mentioned improvement project, pressurized gap protection parts 6 in original technical scheme, are added.The length of pressurized gap protection parts 6 is less than the distance between left part link 4 and right part link 7, and pressurized gap protection parts 6 have certain short length.In the process of buckling restrained brace tension power effect, pressurized gap protection parts 6 do not participate in work.Do the used time when buckling restrained brace is under pressure, buckling restrained brace shortens, and when relative deformation is less than short length, pressurized gap protection parts 6 do not participate in stressed; When relative deformation is greater than short length, pressurized gap protection parts 6 provide part (when core stressed member works) or whole rigidity (when the fracture of core stressed member is deactivated), thereby reduce the relative compressive strain at buckling restrained brace two ends.In this process, tension gap protection parts 5 do not participate in work.Visible, improvement project makes structure in tension and pressurized process, all carry out the protection to buckling restrained brace, has improved the Deformation control ability of buckling restrained brace.Protection can select to be as required subject to pulling force and pressure-acting time, also can only play protection in the tension masterpiece used time.When structure is born violent earthquake effect; the core stressed member 1 of buckling restrained brace experiences large strain repeated action and after rupturing and deactivating; tension gap protection parts 5 and pressurized gap protection parts 6 larger draw producing at member, when compressive strain still for structure provides reliable anti-side rigidity; avoid being out of shape unrestricted development, prevent structural collapse.This can be used as the last line of defense that prevents structural collapse.
In technique scheme, tension gap protection parts 5 can have multiple, the preferred rigid rod of the technical program or flexible cable.As shown in Figures 1 to 6, tension gap protection parts 5 are rigid rods.The left end of rigid rod stretches out left part link 4, and left nut 9 is set in the termination of rigid rod left end.The right-hand member of rigid rod stretches out right part link 7, and right nut 10 is set in the termination of rigid rod right-hand member.Distance between left nut 9 and right nut 10 is greater than the distance between left part link 4 and right part link 7.For relatively fixing the position of rigid rod in buckling restrained brace, avoid its unnecessary displacement, limit spring 11 can be set.This limit spring 11 is between left nut 9 and left part link 4, or between right nut 10 and right part link 7, or simultaneously between left nut 9 and left part link 4 and between right nut 10 and right part link 7.
As shown in Figure 7 and Figure 8, tension gap protection parts 5 can also be flexible cables.The connected mode of flexible cable and left part link 4 and right part link 7 has two kinds.The first connected mode is: the termination at the left end of flexible cable arranges left securing member 12, the termination of the right-hand member of flexible cable arranges right securing member 13, then the right securing member 13 of flexible cable is fixedly connected with right part link 7, the left securing member 12 of flexible cable is fixedly connected with left part link 4; The second connected mode is: the left end of flexible cable is stretched out to left part link 4, then left securing member 12 is set in the termination of flexible cable left end, the right-hand member of flexible cable is stretched out to right part link 7, then right securing member 13 is set in the termination of flexible cable right-hand member., in the second connected mode, be wherein the position of fixing flexible rope in buckling restrained brace, avoid its unnecessary displacement, limit spring 11 can be set.Limit spring 11 can be between left securing member 12 and left part link 4, or between right securing member 13 and right part link 7, or simultaneously between left securing member 12 and left part link 4 and between right securing member 13 and right part link 7.
The planform of the technical program can be multiple, existing only take structure as shown in Figures 3 to 6 as example, is explained.
As shown in Figures 3 to 6, core stressed member 1 is plate body.Buckling-restrained parts are made up of two buckling-restrained plates 2 and two buckling-restrained channel-section steels 3.Tension gap protection parts 5 are rigid rods, and quantity is two.Pressurized gap protection parts 6 are rectangle sleeve pipes.Two buckling-restrained plates 2 and two buckling-restrained channel-section steels 3 are positioned at the outside surrounding of core stressed member 1, and two buckling-restrained plates 2 are mutually corresponding, and two buckling-restrained channel-section steels 3 are mutually corresponding.Between buckling-restrained plate 2 and buckling-restrained channel-section steel 3, be fixedly connected with, for example, can connect with bolt 8.Buckling-restrained plate 2 and buckling-restrained channel-section steel 3 are done as a whole, can move freely at the external surface of core stressed member 1.The left end of core stressed member 1 is fixedly connected with left part link 4, and the right-hand member of core stressed member 1 is fixedly connected with right part link 7.Two rigid rods are positioned at the outside of core stressed member 1, and take core stressed member 1 as axis of symmetry, are symmetrically distributed in the both sides of core stressed member 1.The right-hand member of rigid rod stretches out right part link 7, and right nut 10 is set in the termination of rigid rod right-hand member, and the distance between left nut 9 and right nut 10 is greater than the distance between left part link 4 and right part link 7.Pressurized gap protection parts 6 are arranged on the periphery of buckling-restrained parts and tension gap protection parts 5, and the right-hand member of pressurized gap protection parts 6 is fixedly connected with right part link 7.The length of pressurized gap protection parts 6 is less than the clear distance between left part link 4 and right part link 7.The cross section of left part link 4, right part link 7 is greater than the Outside Dimensions of pressurized gap protection parts 6, to can utilize when needed left part link 4 and right part link 7 that pressure is passed to pressurized gap protection parts 6.
When installation, first, buckling-restrained plate 2 and buckling-restrained channel-section steel 3 are assembled in to the outside of core stressed member 1, and tighten the bolt 8 that connects buckling-restrained plate 2 and buckling-restrained channel-section steel 3; Then, core stressed member 1 is fixedly connected with right part link 7, and puts pressurized gap protection parts 6, i.e. rectangle sleeve pipe, is fixedly connected with rectangle sleeve pipe with right part link 7; Subsequently, core stressed member 1 is connected with left part link 4; Then, rigid rod is passed to left part link 4 and right part link 7; Finally, put on respectively a limit spring 11 at the two ends of rigid rod, and screw on left nut 9 and right nut 10, regulate the gap between left nut 9 and left part link 4, and gap between right nut 10 nuts and right part link 7.
Because shape and the position of the core stressed member 1 in buckling restrained brace and buckling-restrained parts are flexible and changeable.As long as add tension gap protection parts 5 in existing buckling restrained brace; no matter tension gap protection parts 5 are parts of which kind of shape; as long as the left end of these tension gap protection parts 5 is connected with left part link 4; the right-hand member of tension gap protection parts 5 is connected with right part link 7; and the straight length of tension gap protection parts 5 is greater than the distance between left part link 4 and right part link 7, fall into the protection domain of this patent.
Claims (7)
1. the buckling restrained brace with tension gap protection parts, comprise core stressed member (1), buckling-restrained parts, left part link (4) and right part link (7), the left end of core stressed member (1) is fixedly connected with left part link (4), the right-hand member of core stressed member (1) is fixedly connected with right part link (7), the surface of core stressed member (1) is by the removable parcel of buckling-restrained parts, it is characterized in that, also comprise tension gap protection parts (5), the left end of these tension gap protection parts (5) is connected with left part link (4), the right-hand member of tension gap protection parts (5) is connected with right part link (7), and the straight length of tension gap protection parts (5) is greater than the distance between left part link (4) and right part link (7), tension gap protection parts (5) have redundant length.
2. according to the buckling restrained brace with tension gap protection parts claimed in claim 1, it is characterized in that, also comprise pressurized gap protection parts (6), these pressurized gap protection parts (6) are positioned between left part link (4) and right part link (7), the length of pressurized gap protection parts (6) is less than the distance between left part link (4) and right part link (7), and pressurized gap protection parts (6) have short length; Pressurized gap protection parts (6) are fixedly connected with left part link (4), or are fixedly connected with right part link (7), or are fixedly connected with buckling-restrained parts.
3. according to the buckling restrained brace with tension gap protection parts described in claim 1 or 2; it is characterized in that; described tension gap protection parts (5) are rigid rods; the termination of rigid rod left end arranges left nut (9); the termination of rigid rod right-hand member arranges right nut (10), and the distance between left nut (9) and right nut (10) is greater than the distance between left part link (4) and right part link (7).
4. according to the buckling restrained brace with tension gap protection parts claimed in claim 3; it is characterized in that; also comprise limit spring (11); limit spring (11) is positioned between left nut (9) and left part link (4); or be positioned between right nut (10) and right part link (7), or be positioned between left nut (9) and left part link (4) and between right nut (10) and right part link (7) simultaneously.
5. according to the buckling restrained brace with tension gap protection parts described in claim 1 or 2; it is characterized in that; described tension gap protection parts (5) are flexible cables; the termination of the left end of flexible cable arranges left securing member (12); left securing member (12) is fixedly connected with left part link (4); the termination of the right-hand member of flexible cable arranges right securing member (13), and right securing member (13) is fixedly connected with right part link (7).
6. according to the buckling restrained brace with tension gap protection parts described in claim 1 or 2; it is characterized in that; described tension gap protection parts (5) are flexible cables; the left end of this flexible cable stretches out left part link (4); and left securing member (12) is set in the termination of flexible cable left end; the right-hand member of flexible cable stretches out right part link (7), and in the termination of flexible cable right-hand member, right securing member (13) is set.
7. according to the buckling restrained brace with tension gap protection parts claimed in claim 6; it is characterized in that; also comprise limit spring (11); limit spring (11) is positioned between left securing member (12) and left part link (4); or be positioned between right securing member (13) and right part link (7), or be positioned between left securing member (12) and left part link (4) and between right securing member (13) and right part link (7) simultaneously.
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| CN201110379954.4A CN102400500B (en) | 2011-11-25 | 2011-11-25 | Buckling restrained brace with tension interval protection member |
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| CN201110379954.4A CN102400500B (en) | 2011-11-25 | 2011-11-25 | Buckling restrained brace with tension interval protection member |
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| CN102400500A CN102400500A (en) | 2012-04-04 |
| CN102400500B true CN102400500B (en) | 2014-07-09 |
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| CN201110379954.4A Active CN102400500B (en) | 2011-11-25 | 2011-11-25 | Buckling restrained brace with tension interval protection member |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102808464B (en) * | 2012-07-31 | 2014-06-11 | 东南大学 | Fiber pre-stretched rod type self-centering steel buckling-restrained brace |
| CN103206029B (en) * | 2013-05-10 | 2015-04-08 | 东南大学 | Micro-vibration energy-consumption viscoelastic buckling restrained brace |
| CN103362232A (en) * | 2013-08-05 | 2013-10-23 | 东南大学 | Prefabricated assembled type buckling constraining support |
| CN103899002A (en) * | 2014-04-11 | 2014-07-02 | 北京工业大学 | Tubular veneer self-reset buckling and decentration preventing supporting system of industrialization assembly type multi-layer and high-layer steel structure |
| CN103924662A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Self-reset pre-stressed buckling-prevention central tubular veneer supporting system for industrial assembly type multi-layer and high-rise steel structures |
| CN103912058A (en) * | 2014-04-11 | 2014-07-09 | 北京工业大学 | Self-resetting buckling-restrained central bracing system with single tubular plates for industrial fabricated multi-storey and high-rise steel structures |
| CN103981968A (en) * | 2014-04-11 | 2014-08-13 | 北京工业大学 | Tubular single-plate assembly type steel-structure self-resetting buckling restrained brace |
| CN107109841A (en) * | 2014-11-07 | 2017-08-29 | 渥太华大学 | Use the seismic hardening of traditional armored concrete moment resisting of buckling restrained brace |
| CN108035597B (en) * | 2017-05-17 | 2019-10-08 | 大连大学 | Anti- unstability device |
| CN108060814B (en) * | 2017-05-17 | 2019-06-25 | 大连大学 | The anti-unstability device of the torsion of anti-buckling support |
| CN113958000B (en) * | 2021-12-22 | 2022-03-04 | 北京市建筑设计研究院有限公司 | Series sleeve type double-yield-point buckling restrained brace |
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| US7225588B2 (en) * | 2003-07-08 | 2007-06-05 | Nippon Steel Corporation | Damping brace and structure |
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| CN1973098A (en) * | 2004-03-03 | 2007-05-30 | 蒙特利尔艾科尔工艺技术公司 | Self-centering energy dissipative brace apparatus with tensioning elements |
| CN1769607A (en) * | 2004-12-16 | 2006-05-10 | 东南大学 | High energy consumption reposition metal damper |
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