CN104831826A - Lap-jointed self-centering buckling-restrained brace - Google Patents
Lap-jointed self-centering buckling-restrained brace Download PDFInfo
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- CN104831826A CN104831826A CN201510217686.4A CN201510217686A CN104831826A CN 104831826 A CN104831826 A CN 104831826A CN 201510217686 A CN201510217686 A CN 201510217686A CN 104831826 A CN104831826 A CN 104831826A
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- outer tube
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Abstract
The invention discloses a lap-jointed self-centering buckling-restrained brace. The brace comprises a rectangular inner sleeve, a rectangular outer sleeve, an energy-consuming core board which is used for connecting an inner sleeve base plate with an outer sleeve base plate, a first end plate which is arranged in the inner sleeve, a second end plate which is arranged in the outer sleeve, and pre-drawing rods, wherein the pre-drawing rods are arranged in the inner sleeve, and the two ends of the pre-drawing rods are respectively anchored at the first end plate and the second end plate; a part of the inner sleeve is inserted into the outer sleeve and is in lap joint with the outer sleeve; the end, inserted into the outer sleeve, of the inner sleeve, is in contact with the second end plate; the first end plate is in contact with one end of the outer sleeve; a top plate and a base plate of a non-lap-joint end of the inner sleeve are respectively connected with a first connecting plate; the top plate and the base plate of the non-lap-joint end of the outer sleeve are respectively connected with a second connecting plate; the first end plate is in contact with an inner sleeve push plate by an arranged first end plate rubber pad; the second end plate is in contact with the inner sleeve push plate by an arranged second end plate rubber pad.
Description
Technical field
The invention belongs to field of civil engineering, relating to a kind of overlapping self-centering buckling restrained brace for reducing engineering structures earthquake disaster.
Background technology
Earthquake brings extremely serious disaster to the mankind.What traditional seismic design adopted is Ductility Design Method, namely, under geological process, by surrender in advance and the destruction of structure division component, but entirety is unlikely to loss of function, rely on the plastic strain of component to carry out the seismic energy of dissipates substantial, thus reach the object ensureing agent structure safety.Wherein, the advantages such as energy dissipation capacity is strong owing to having for buckling restrained brace, good damping effect and shake are easily changed afterwards, are being widely used in recent years.
Buckling restrained brace is a kind of metal yield dissipative member, and it is by bearing the core cell of axial load and preventing the constraint element of core cell generation low order flexing from forming.Buckling restrained brace, under little shake and designed wind load effect, is in the elastic deformation stage of full component all the time, for structure provides enough Rigidity and strengths.Under middle shake and large shake effect, the core cell of buckling restrained brace can enter yielding stage, but there will not be flexing due to the effect of constraint element, thus to be dissipated seismic energy by plastic strain, reduce the earthquake effect of agent structure, ensure the safety of main body.But the post-yield stiffness that buckling restrained brace is lower then can make its frame construction be easy to produce larger permanent set after shake, thus significantly improves difficulty and the expense of structure repair.
For effectively controlling the permanent set of buckling restrained brace, can the self-centering system be made up of pre-pull bar, Double-sleeve and end plate be introduced in buckling restrained brace, form self-centering buckling restrained brace.During earthquake, self-centering buckling restrained brace effectively can overcome by means of the pretension be applied in pre-pull bar the yield deformation that core cell produces because of power consumption, thus significantly reduces the permanent set of structure, makes it arrive self-centering effect.But because the strain of tradition pre-rod material extreme elastic is less, expendable plastic strain can be caused after generation moderate finite deformation, thus cause the loss of pretension, and then the self-centering effect that impact supports.For this reason, when designing self-centering buckling restrained brace, make the length of Double-sleeve close to supporting total length all as far as possible, by increase prestretching pole length make to be supported on meet structural earthquake deformation requirements while do not affect self-resetting capability again.The excessive increase that also result in supported weight of casing length, is unfavorable for the antidetonation of structure.In addition, in the course of work that self-centering supports, along with sleeve pipe and end plate contact or be separated, the rigidity of support there will be obvious sudden change, makes structure produce larger floor acceleration when earthquake, causes the damage of precision equipment and non-structural element in building.
Summary of the invention
Technical problem: the present invention is directed to existing self-centering buckling restrained brace and occur the defect that rigidity suddenly change in the great and course of work, provides a kind of overlapping self-centering buckling restrained brace of rigidity smooth excessiveness when effectively reducing support own wt and can realize work.
Technical scheme: overlapping self-centering buckling restrained brace of the present invention, comprise rectangle inner sleeve, rectangle outer tube, connect the power consumption core board of inner sleeve base plate and outer tube base plate, be arranged at the first end plate in inner sleeve, be arranged at the second end plate in outer tube, be arranged on the pre-pull bar that in inner sleeve and two ends are anchored in the first end plate and the second end plate respectively, a part for inner sleeve is inserted in outer tube and is also overlapped with it, one end in inner sleeve insertion outer tube and the second end plate contact, the end thereof contacts of the first end plate and outer tube, the non-overlapping end top board of inner sleeve and base plate are connected to the first junction plate, the non-overlapping end top board of outer tube and base plate are connected to the second junction plate, the overlapping mode of inner sleeve and outer tube is: at the overlap of inner sleeve, top board is provided with inner sleeve breach, biside plate is respectively arranged with notch, biside plate is provided with inner sleeve push pedal simultaneously, at the overlap of outer tube, top board is provided with outer tube breach, outer tube first push pedal is provided with below outer tube breach, the below of outer tube first push pedal is provided with outer tube second push pedal, the inner sleeve breach on inner sleeve top board is inserted in outer tube first push pedal, and the notch on inner sleeve is inserted in outer tube second push pedal.
Further, the side plate of outer tube is provided with end plate cushion cap, the second end plate gripper shoe that the second end plate is arranged by side is placed on end plate cushion cap, and the first end plate inserts the notch on inner sleeve by the first end plate gripper shoe that side is arranged.
Further, outer tube first push pedal and outer tube second push pedal are fixedly mounted on the side plate of outer tube, the spacing of outer tube first push pedal and outer tube second push pedal equals the distance between inner sleeve breach and notch, inner sleeve push pedal, outer tube first push pedal and outer tube second push pedal are equal to the lap length of inner sleeve and outer tube along the length of sleeve pipe axis, and the notch of inner sleeve and the end plate cushion cap of outer tube should be determined according to the requirement of supported design axial deformation along the length of sleeve pipe axis; One end of power consumption core board is connected with inner sleeve base plate, and the other end is connected with outer tube base plate.
Further, the first end plate is contacted with inner sleeve push pedal by the first end plate rubber pad arranged, and the second end plate is contacted with inner sleeve push pedal by the second end plate rubber pad arranged
Beneficial effect: the present invention compared with prior art, has the following advantages:
(1) the technical program effectively reduces the weight supporting self.Because marmem has super elastic characteristics, its maximum recoverable strain is about three times of traditional fibre muscle, and this adopts sleeve pipe lapped configuration form to provide condition for self-centering system.With the sleeve pipe of traditional self-centering buckling restrained brace along supporting compared with total length arranges, the self-centering system due to the technical program adopts sleeve pipe lapped configuration form, can the length of effective limiting boot, thus realizes the effect that reduction support conducts oneself with dignity.Sleeve pipe lap length can require to adjust flexibly according to difference, when sleeve pipe lap length is taken as 1/3 of bearing length, support deadweight and reduce about 40% compared to sleeve pipe along supporting when total length is arranged, thus the horizontal loading born when can effectively reduce structural earthquake, be more conducive to the control of seismic structural response.
(2) maximum floor acceleration when the technical program can effectively reduce structural earthquake.For traditional self-centering buckling restrained brace, owing to being rigid contact between its end plate and sleeve pipe, cause being contacting and separating along with sleeve pipe and end plate in support works process, obvious sudden change can be there is in the rigidity supported, thus cause structure to produce excessive floor acceleration when earthquake, cause the damage of precision equipment in building and non-structural element.And the technical program with the addition of rubber pad in the side of end plate and casing-contact, the effect of flexible buffer can be played, support stiffness can be seamlessly transitted in the course of the work, by maximum floor acceleration during control structure earthquake, to reduce the economic loss caused by the non-structural element in building and device damage.
(3) the technical program is easy to regular maintenance and the reparation after shaking.Adopt totally-enclosed design with the sleeve pipe of traditional self-centering buckling restrained brace and the core board that consumes energy is positioned at compared with inside pipe casing, the technical program, owing to having reserved breach on inner sleeve and outer tube, is convenient to technician and is carried out daily inspection and maintenance to support.In addition core board is linked together by bolt and sleeve pipe, breach reserved on sleeve pipe is then for the installation and removal of bolt are provided convenience, when this repairs after making to shake structure, only need by the Bolt dismantling of core board serious for plastic deformation, then change brand-new core board, thus avoid and carry out overall disassembling to supporting, not only simplify the structure the difficulty of repairing, increase work efficiency, and greatly saved maintenance cost.
(4) the technical program be structure antidetonation protection provide double defence line.When structure bears violent earthquake effect, traditional self-centering buckling restrained brace absorbs seismic energy by means of only core board.And the technical program is except the surrender power consumption by power consumption core board, the vibratory response of structure is decayed, outside formation first is heavily consumed energy, because the pre-pull bar of marmem has super-elasticity and energy consumption characters, therefore for the self-centering system adopting the pre-pull bar of marmem, except providing for supporting the self-centering restoring force overcome needed for permanent set, extra energy dissipation capacity can also be provided, the second heavy dissipative member of the technical program, thus the seismic response of the more effective control structure of energy.
Accompanying drawing explanation
Fig. 1 is the elevation of apparatus of the present invention;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is the B-B sectional drawing of Fig. 1;
Fig. 4 is the C-C sectional drawing of Fig. 1;
Fig. 5 is the longitudinal sectional drawing of Fig. 1;
Fig. 6 is the axonometric drawing of power consumption core board;
Fig. 7 is the elevation one of inner sleeve;
Fig. 8 is the elevation two of inner sleeve;
Fig. 9 is the A-A sectional drawing of Fig. 7;
Figure 10 is the B-B sectional drawing of Fig. 7;
Figure 11 is the longitudinal sectional drawing of Fig. 7;
Figure 12 is the elevation one of outer tube;
Figure 13 is the elevation two of outer tube;
Figure 14 is the A-A sectional drawing of Figure 12;
Figure 15 is the B-B sectional drawing of Figure 12;
Figure 16 is the C-C sectional drawing of Figure 12;
Figure 17 is the longitudinal sectional drawing of Figure 12;
Figure 18 is the first end plate elevation;
Figure 19 is the first end plate lateral view;
Figure 20 is the second end plate elevation;
Figure 21 is the second end plate lateral view;
Figure 22 is in situ schematic view of the present invention;
Figure 23 is tension state schematic diagram of the present invention;
Figure 24 is pressured state schematic diagram of the present invention.
Have in figure: inner sleeve 1, inner sleeve breach 11, notch 12, inner sleeve push pedal 13, outer tube 2, outer tube breach 21, outer tube first push pedal 22, outer tube second push pedal 23, end plate cushion cap 24, power consumption core board 3, pre-pull bar 4, first end plate 5, first end plate gripper shoe 51, first end plate rubber pad 52, second end plate 6, second end plate gripper shoe 61, second end plate rubber pad 62, first junction plate 7, second junction plate 8.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail.
As shown in Fig. 1 ~ Fig. 5, overlapping self-centering buckling restrained brace of the present invention, comprise rectangle inner sleeve 1, rectangle outer tube 2, connect the power consumption core board 3 of inner sleeve 1 base plate and outer tube 2 base plate, be arranged at the first end plate 5 in inner sleeve 1, be arranged at the second end plate 6 in outer tube 2, be arranged on the pre-pull bar 4 that in inner sleeve 1 and two ends are anchored in the first end plate 5 and the second end plate 6 respectively, a part for inner sleeve 1 is inserted in outer tube 2 and is also overlapped with it, one end that inner sleeve 1 inserts in outer tube 2 contacts with the second end plate 6, and the end thereof contacts of the first end plate 5 and outer tube 2, the non-overlapping end top board of inner sleeve 1 and base plate are connected to the first junction plate 7, the non-overlapping end top board of outer tube 2 and base plate are connected to the second junction plate 8, support and be connected with agent structure with the second junction plate 8 by the first junction plate 7, and the material of pre-pull bar 4 is the marmem with super-elasticity and energy dissipation behavior.
As shown in Figure 6, the material of power consumption core board 3 is the steel with low yield strength and high ductility, by breadth of section in the middle part of reduction power consumption core board 3 to guarantee that its end is in elastic stage all the time in loading process.As shown in Figure 5, the connected mode of one end and inner sleeve 1 base plate of power consumption core board 3 can the with bolts or form of welding, and the other end of the core board 3 that consumes energy and the connected mode of outer tube 2 base plate also can the with bolts or forms of welding.
As shown in Fig. 7 ~ Figure 11, at the overlap of inner sleeve 1, top board is provided with inner sleeve breach 11, and biside plate is respectively arranged with notch 12, and biside plate is provided with inner sleeve push pedal 13 simultaneously.As shown in Figure 12 ~ Figure 17, at the overlap of outer tube 2, top board is provided with outer tube breach 21, outer tube first push pedal 22 is provided with below outer tube breach 21, the below of outer tube first push pedal 22 is provided with outer tube second push pedal 23, outer tube first push pedal 22 and outer tube second push pedal 23 are fixedly mounted on the side plate of outer tube 2, the side plate of outer tube 2 are provided with end plate cushion cap 24.As shown in Figure 5, inner sleeve 1 with the overlapping mode of outer tube 2 is: the inner sleeve breach 11 on inner sleeve 1 top board is inserted in outer tube first push pedal 22, and the notch 12 on inner sleeve 1 is inserted in outer tube second push pedal 23.Wherein the spacing of outer tube first push pedal 22 and outer tube second push pedal 23 equals the distance between inner sleeve breach 11 and notch 12, inner sleeve push pedal 13, outer tube first push pedal 22 and outer tube second push pedal 23 are equal to the lap length of inner sleeve 1 and outer tube 2 along the length of sleeve pipe axis, and the notch 12 of inner sleeve 1 and the end plate cushion cap 24 of outer tube 2 should be determined according to the requirement of supported design axial deformation along the length of sleeve pipe axis.
As shown in Fig. 5 and Figure 18 ~ Figure 21, the second end plate gripper shoe 61 that second end plate 6 is arranged by side is placed on end plate cushion cap 24, first end plate 5 inserts the notch 12 on inner sleeve 1 by the first end plate gripper shoe 51 that side is arranged, first end plate 5 is contacted with inner sleeve push pedal 13 by the first end plate rubber pad 52 arranged, second end plate 6 is contacted with inner sleeve push pedal 13 by the second end plate rubber pad 62 arranged, the connected mode of first end plate rubber pad 52 and the first end plate 5 and the connected mode of the second end plate rubber pad 62 and the second end plate 6 all can adopt gluing or bolted form, first end plate 5 and the second end plate 6 only to put under the pretension effect in pre-pull bar 4 tightly withstand inner sleeve push pedal 13, the two ends of outer tube first push pedal 22 and outer tube second push pedal 23, to ensure when supporting tension and pressurized, first end plate 5 and the second end plate 6 can with inner sleeve push pedal 13, outer tube first push pedal 22 is separated with outer tube second push pedal 23, pre-pull bar 4 can be extended.
In the technical program, inner sleeve 1 and outer tube 2 play two important function: the base plate of (1) inner sleeve 1 and the base plate of outer tube 2 are as the confining part of power consumption core board 3, prevent power consumption core board 3 from flat out-of-plane buckling occurring, to give full play to the surrender energy dissipation capacity of power consumption core board 3; (2) inner sleeve 1 and outer tube 2 form self-centering system with pre-pull bar 4, first end plate 5 and the second end plate 6, by applying pretension to eliminate the plastic strain of power consumption core board 3 in pre-pull bar 4, realize overall self-centering object.
The operating principle of overlapping self-centering buckling restrained brace is as shown in Figure 22 ~ Figure 24, owing to being applied with initial prestress to pre-pull bar 4, when support do not bear external load time (see Figure 22), the first end plate 5 and the second end plate 6 can be close to the two ends of inner sleeve push pedal 13, outer tube first push pedal 22 and outer tube second push pedal 23.When supporting tension (see Figure 23), first junction plate 7 and the second junction plate 8 can produce mutually away from trend, inner sleeve 1 is moved to the left under the drive of the first junction plate 7, and by inner sleeve push pedal 13 pushing tow first end plate 5 left, outer tube 2 moves right under the drive of the second junction plate 8, and by outer tube first push pedal 22 and outer tube second push pedal 23 pushing tow second end plate 6 to the right.When supporting pressurized (see Figure 24), first junction plate 7 and the second junction plate 8 can produce trend close to each other, inner sleeve 1 moves right under the drive of the first junction plate 7, and by inner sleeve push pedal 13 pushing tow second end plate 6 to the right, outer tube 2 is moved to the left under the drive of the second junction plate 8, and by outer tube first push pedal 22 and outer tube second push pedal 23 pushing tow first end plate 5 left.No matter support tension or pressurized, the first end plate 5 and the second end plate 6 all the time mutual away from, ensure in the journey crossed at supporting deformation thus, pre-pull bar 4 all the time tension extend, for supporting the restoring force continuing to provide needed for self-centering.The left end of core board 3 of consuming energy then moves with inner sleeve 1 and outer tube 2 respectively with right-hand member, makes power consumption core board 3 produce the plastic strain of tension or pressurized along with the distortion supported, with earthquake energy.
The installation procedure of this technological invention is: at the top board cutting inner sleeve breach 11 of inner sleeve 1, the biside plate of inner sleeve 1 cuts notch 12 and welding inner sleeve push pedal 13 → at the top board cutting outer tube breach 21 of outer tube 2, solder mask pipe first push pedal 22 on the biside plate of outer tube 2, outer tube second push pedal 23 and end plate cushion cap 24 → the first end plate gripper shoe 51 is inserted in the notch 12 of inner sleeve 1, second end plate gripper shoe 61 is positioned on the end plate cushion cap 24 of outer tube 2 → the inner sleeve breach 11 on inner sleeve 1 top board is inserted in outer tube first push pedal 22, outer tube second push pedal 23 is inserted the notch 12 on inner sleeve 1, complete inner sleeve 1 and outer tube 2 overlap joint install → pre-pull bar 4 is penetrated in inner sleeve 1, to be anchored at after Shi Hanzhang on the first end plate 5 and the second end plate 6 → power consumption core board 3 is inserted between inner sleeve 1 base plate and outer tube 2 base plate, be bolted or Type of Welding by the two ends of power consumption core board 3 respectively with inner sleeve 1 base plate with outer tube 2 base plate consolidation → by the first junction plate 7, end top board non-overlapping with inner sleeve 1 and base plate weld respectively, by the second junction plate 8, end top board non-overlapping with outer tube 2 and base plate weld respectively.
Above-described embodiment is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention; some improvement and equivalent replacement can also be made; these improve the claims in the present invention and are equal to the technical scheme after replacing, and all fall into protection scope of the present invention.
Claims (4)
1. an overlapping self-centering buckling restrained brace, it is characterized in that, this support comprises rectangle inner sleeve (1), rectangle outer tube (2), connect the power consumption core board (3) of described inner sleeve (1) base plate and outer tube (2) base plate, be arranged at the first end plate (5) in inner sleeve (1), be arranged at the second end plate (6) in outer tube (2), be arranged on the pre-pull bar (4) that in inner sleeve (1) and two ends are anchored in the first end plate (5) and the second end plate (6) respectively, a part for described inner sleeve (1) is inserted in outer tube (2) and is also overlapped with it, one end that inner sleeve (1) inserts in outer tube (2) contacts with the second end plate (6), the end thereof contacts of described first end plate (5) and outer tube (2), the non-overlapping end top board of described inner sleeve (1) and base plate are connected to the first junction plate (7), the non-overlapping end top board of outer tube (2) and base plate are connected to the second junction plate (8),
Described inner sleeve (1) with the overlapping mode of outer tube (2) is: at the overlap of inner sleeve (1), top board is provided with inner sleeve breach (11), biside plate is respectively arranged with notch (12), biside plate is provided with simultaneously inner sleeve push pedal (13), at the overlap of described outer tube (2), top board is provided with outer tube breach (21), described outer tube breach (21) below is provided with outer tube first push pedal (22), the below of described outer tube first push pedal (22) is provided with outer tube second push pedal (23), the inner sleeve breach (11) on inner sleeve (1) top board is inserted in described outer tube first push pedal (22), the notch (12) on inner sleeve (1) is inserted in described outer tube second push pedal (23).
2. overlapping self-centering buckling restrained brace according to claim 1, it is characterized in that, the side plate of described outer tube (2) is provided with end plate cushion cap (24), the second end plate gripper shoe (61) that described second end plate (6) is arranged by side is placed on end plate cushion cap (24), and described first end plate (5) inserts the notch (12) on inner sleeve (1) by the first end plate gripper shoe (51) that side is arranged.
3. overlapping self-centering buckling restrained brace according to claim 1 and 2, it is characterized in that, described outer tube first push pedal (22) and outer tube second push pedal (23) are fixedly mounted on the side plate of outer tube (2), the spacing of outer tube first push pedal (22) and outer tube second push pedal (23) equals the distance between inner sleeve breach (11) and notch (12), and inner sleeve push pedal (13), outer tube first push pedal (22) and outer tube second push pedal (23) are equal to inner sleeve (1) along the length of sleeve pipe axis
With the lap length of outer tube (2), the notch (12) of inner sleeve (1) and the end plate cushion cap (24) of outer tube (2) should be determined according to the requirement of supported design axial deformation along the length of sleeve pipe axis;
One end of described power consumption core board (3) is connected with inner sleeve (1) base plate, and the other end is connected with outer tube (2) base plate.
4. overlapping self-centering buckling restrained brace according to claim 1 and 2, it is characterized in that, described first end plate (5) is contacted with inner sleeve push pedal (13) by the first end plate rubber pad (52) arranged, and described second end plate (6) is contacted with inner sleeve push pedal (13) by the second end plate rubber pad (62) arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217686.4A CN104831826B (en) | 2015-04-30 | 2015-04-30 | Lap-jointed self-centering buckling-restrained brace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217686.4A CN104831826B (en) | 2015-04-30 | 2015-04-30 | Lap-jointed self-centering buckling-restrained brace |
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| CN104831826A true CN104831826A (en) | 2015-08-12 |
| CN104831826B CN104831826B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510217686.4A Active CN104831826B (en) | 2015-04-30 | 2015-04-30 | Lap-jointed self-centering buckling-restrained brace |
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| CN105155712A (en) * | 2015-08-27 | 2015-12-16 | 浙江大学 | Self-reset steel connecting beam system with shape memory alloy draw bars |
| CN106285138A (en) * | 2016-09-14 | 2017-01-04 | 东南大学 | A kind of self-centering system end connecting device |
| CN106284727A (en) * | 2016-09-14 | 2017-01-04 | 东南大学 | A kind of self-centering buckling restrained brace end connecting device |
| CN106400997A (en) * | 2016-09-14 | 2017-02-15 | 东南大学 | Round-pipe self-centering buckling restrained brace end connecting device |
| CN109356299A (en) * | 2018-11-06 | 2019-02-19 | 江苏蓝科减震科技有限公司 | A kind of novel buckling restrained brace stage by stage |
| CN111733996A (en) * | 2020-06-11 | 2020-10-02 | 贵州理工学院 | Self-centering buckling restrained brace of large-deformation pulley block |
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| CN106285138A (en) * | 2016-09-14 | 2017-01-04 | 东南大学 | A kind of self-centering system end connecting device |
| CN106284727A (en) * | 2016-09-14 | 2017-01-04 | 东南大学 | A kind of self-centering buckling restrained brace end connecting device |
| CN106400997A (en) * | 2016-09-14 | 2017-02-15 | 东南大学 | Round-pipe self-centering buckling restrained brace end connecting device |
| CN106400997B (en) * | 2016-09-14 | 2018-12-28 | 东南大学 | A kind of self-centering buckling restrained brace end connecting device of round tube |
| CN106285138B (en) * | 2016-09-14 | 2018-12-28 | 东南大学 | A kind of self-centering system end connecting device |
| CN109356299A (en) * | 2018-11-06 | 2019-02-19 | 江苏蓝科减震科技有限公司 | A kind of novel buckling restrained brace stage by stage |
| CN111733996A (en) * | 2020-06-11 | 2020-10-02 | 贵州理工学院 | Self-centering buckling restrained brace of large-deformation pulley block |
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