Parallel type double-order buckling restrained brace

Abstract

The utility model discloses a parallel type double-order buckling restrained brace which comprises a main core material and an auxiliary core material, restrained steel pipes are arranged on the outer sides of the main core material and the auxiliary core material in a sleeved mode, end plates are arranged at the ends of the restrained steel pipes, limiting assemblies are arranged at one ends of the main core material and the auxiliary core material, and the main core material and the auxiliary core material are matched with the limiting assemblies to move. When an earthquake occurs, the main core material deforms and slightly deforms due to pressure or tensile force brought by a building, the main core material yields energy consumption and enters a first-stage yield, and after a certain displacement is exceeded, the auxiliary core material yields energy consumption due to stress and enters a second-stage yield. The device is simple in structure, high in energy consumption efficiency and high in rigidity and bearing capacity, and the problems that in the prior art, the structure is complex, cost is too high, and the application scene is limited are effectively solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building shock absorption, in particular to a parallel type double-stage buckling restrained brace. BACKGROUND

[0002] The buckling restrained brace has the characteristics of clear shock absorption mechanism, obvious shock absorption effect, safety and reliability, and economic rationality, and can meet the anti-seismic requirements of different structures. Under normal use state and small earthquake action, the buckling restrained brace provides lateral stiffness for the building structure and plays the role of ordinary support; under large earthquake action, the buckling restrained brace can dissipate the energy input by the earthquake through repeated tension-compression hysteresis. Due to the good hysteresis performance of the buckling restrained brace, the buckling restrained brace is widely used in engineering. At present, some scholars begin to research and develop stage-yielding buckling restrained braces. Under small earthquake, part of the buckling restrained brace yields to dissipate energy, and under medium or large earthquake, most of the buckling restrained brace yields to dissipate energy, thereby effectively improving the energy dissipation capacity of the buckling restrained brace against different intensity earthquakes. At present, the implementation methods of the stage-yielding buckling restrained brace include the combination of dampers with different energy dissipation mechanisms and the combination of dampers with different energy dissipation materials, and there are series and parallel modes, and some projects have been applied. However, the structure is complex and the cost is high.

[0003] The application patent with the application number CN113123480B discloses a multi-stage buckling restrained brace. The structure of the limiting device is innovatively designed to realize parallel multi-stage yield energy dissipation. Compared with the series multi-stage, the multi-stage energy dissipation core material can simultaneously dissipate energy, and the first-stage core material and the second-stage core material can use steel plates of different materials to meet the design requirements. The limiting device is connected with the stiffened rib plate through design, the limiting device, the stiffened rib plate and the end of the first-stage core material form a whole with large stiffness, and when the second-stage core material is in tension or compression, the bearing capacity of the second-stage core material can be directly transmitted between the whole and the building, which greatly avoids stress concentration of the first-stage core material and protects the buckling restrained brace from damage. Even in the face of a large earthquake, multi-stage energy dissipation can still be realized.

[0004] The multi-stage buckling restrained brace has the problems of complex structure and high cost, and therefore the application scenarios are limited. It is necessary to further improve the prior art. UTILITY MODEL CONTENT

[0005] In order to solve the above problems, the utility model provides a parallel type double-stage buckling restrained brace. The main core material 3, the auxiliary core material 4 and the limiting assembly work together to realize stage-yielding. The device has the advantages of simple structure, high energy dissipation efficiency, high stiffness and high bearing capacity, and effectively solves the problems of complex structure, high cost and limited application scenarios in the prior art.

[0006] The utility model provides a kind of parallel connection type double-stage buckling restrained brace comprising: main core material 3, secondary core material 4, main core material 3 and secondary core material 4 outside sleeve joint setting restraint steel pipe 1, restraint steel pipe 1 end portion is provided with end plate 2, main core material 3 and secondary core material 4 one end setting limiting assembly, main core material 3 and secondary core material 4 and limiting assembly cooperation movement realize stage yielding energy dissipation.

[0007] Further, the restraint steel pipe 1 is filled with grouting material 5 between the main core material 3 and the secondary core material 4, preventing the main core material 3 and the secondary core material 4 from losing stability, improving the overall structural stiffness of the double-stage buckling restrained brace, and the main core material 3 and the secondary core material 4 are provided with limiting assemblies at one end, which cooperate with the main core material 3 and the secondary core material 4 to realize stage yielding energy dissipation.

[0008] Further, the main core material 3 is provided with one block, and the secondary core material 4 is provided with two blocks. The main core material 3 is flush with the secondary core material 4 at one end and is fixedly connected to improve the stability of the connection between the main core material 3 and the secondary core material 4. The length of the main core material 3 is greater than that of the secondary core material 4 at the other end, and the two are lap-connected to provide a double-stage buckling compression space.

[0009] Further, the limiting assembly comprises a first limiting component and / or a second limiting component. The parallel connection type double-stage buckling restrained brace yields in stages under pressure after the first limiting component is subjected to pressure. The parallel connection type double-stage buckling restrained brace yields in stages under tension after the second limiting component is subjected to tension.

[0010] Further, four stiffening blocks 6 are fixedly arranged on the main core material 3 and arranged on both sides of the end where the main core material 3 is lap-connected to the secondary core material 4, so as to balance the stress supported by the main core material 3. The stiffening blocks 6 are used to improve the support force of the main core material 3 and prevent the main core material 3 from bending and breaking under stress.

[0011] Further, the first limiting component is two stop blocks 7, which are arranged at the end where the main core material 3 is lap-connected to the secondary core material 4 and fixedly arranged on both sides of the main core material 3. A gap is provided between the end of the secondary core material 4 and the stop blocks 7 to provide a stage yielding space for stress compression. When the stop blocks 7 come into contact with the end of the secondary core material 4, the secondary core material 4 is compressed, causing the secondary core material 4 to yield and dissipate energy.

[0012] Further, the second limiting component is composed of four first limiting plates 8 and four second limiting plates 11. Four second limiting plates 11 are separately welded on both sides of the end of the secondary core material 4, and four first limiting plates 8 are separately welded on the stiffening blocks 6. A gap is provided between the first limiting plates 8 of the stiffening blocks 6 and the second limiting plates 11 of the secondary core material 4 to provide a stage yielding space for stress stretching. When the main core material 3 and the secondary core material 4 are subjected to tension, they are deformed and displaced. When the first limiting plates 8 of the stiffening blocks 6 come into contact with the second limiting plates 11 of the secondary core material 4, the main core material 3 and the secondary core material 4 yield and dissipate energy under stress at the same time.

[0013] Further, the end plate 2 is provided with two plates, which are respectively arranged at the end of the constraint steel pipe 1, so that the constraint steel pipe 1 can form a closed space.

[0014] Further, the asphalt-coated roll is wrapped outside the main core material 3 and the auxiliary core material 4 to prevent the grouting material 5 from adhering to the main core material 3 and the auxiliary core material 4.

[0015] Further, the main core material 3 and the auxiliary core material 4 pass through the two end plates 2 at two ends and are exposed outside the constraint steel pipe 3.

[0016] Further, the main core material 3 and the auxiliary core material 4 are arranged in a I-shaped cross section and are composed of three main core materials 3 and two auxiliary core materials 4.

[0017] Further, the three main core materials 3 are welded into a I-shaped structure, and the two auxiliary core materials 4 are overlapped in the middle of the I-shaped structure; one end of the main core material 3 is flush with one end of the auxiliary core material 4 and is fixedly connected, so as to improve the stability of the connection between the main core material 3 and the auxiliary core material 4; the other end of the main core material 3 is longer than the other end of the auxiliary core material 4 and is connected in an overlapping manner, so as to provide a two-stage buckling compression space.

[0018] Further, the second limiting component is composed of four first limiting plates 8 and four second limiting plates 11; the two sides of one end of the auxiliary core material 4 are respectively provided with four second limiting plates 11, and the main core material 3 is respectively provided with four first limiting plates 8; a gap is arranged between the first limiting plate 8 of the main core material 3 and the second limiting plate 11 of the auxiliary core material 4, so as to provide a two-stage yield space for force stretching; when the main core material 3 and the auxiliary core material 4 are subjected to tension, the main core material 3 and the auxiliary core material 4 are displaced due to deformation; when the first limiting plate 8 of the main core material 3 and the second limiting plate 11 of the auxiliary core material 4 are in contact, the main core material 3 and the auxiliary core material 4 are simultaneously yielded and energy-dissipated under force.

[0019] Working principle:

[0020] The parallel two-stage buckling constraint support is fixedly installed at a position requiring anti-seismicity and can be installed in different ways such as tilting and verticality, which is defined by the actual anti-seismic scene. The main core material 3, the auxiliary core material 4 and the limiting assembly work cooperatively to form a two-stage buckling constraint support, which has two working modes:

[0021] 1. Working mode when subjected to compression

[0022] The limiting assembly is used to limit the main core material and the auxiliary core material to yield in stages and dissipate energy; when the region is subjected to an earthquake, compression occurs under the action of the seismic force; when the parallel two-stage buckling constraint support is subjected to pressure and appears small deformation, the main core material yields and dissipates energy, and enters a first stage of yield; when the main core material is subjected to large deformation and displacement to the end of the auxiliary core material, the auxiliary core material is in contact with the end of the auxiliary core material after the blocking block, and the auxiliary core material is subjected to pressure and yields and dissipates energy, and enters a second stage of yield.

[0023] 2. Working mode when stretched by force

[0024] The eight limiting plates in the limiting assembly work in cooperation with the main core material and the auxiliary core material. The main core material is provided with four first limiting plates, and the auxiliary core material is provided with four second limiting plates. When stretched by force in an earthquake, the main core material and the auxiliary core material are displaced due to deformation under the action of tension. When the first limiting plate of the main core material contacts the second limiting plate of the auxiliary core material, the main core material and the auxiliary core material yield under force and dissipate energy.

[0025] Beneficial effects:

[0026] 1. The two limiting assemblies are arranged, so that the step yield energy dissipation can be realized when compressed or stretched under force in an earthquake.

[0027] 2. The limiting assembly, the main core material and the auxiliary core material are simple in combined structure and high in energy dissipation efficiency, effectively solving the problems of complex structure, high cost and limited application scenarios in the prior art.

[0028] 3. The filling grouting material is arranged between the constraint steel pipe and the main core material and the auxiliary core material, so that the main core material and the auxiliary core material are prevented from losing stability, the overall structural stiffness of the double-step buckling restrained brace is improved, and the seismic performance is enhanced under the action of seismic force.

[0029] 4. The stiffening part is arranged to improve the supporting force of the main core material, balance the stress supported by the main core material, avoid stress concentration of the main core material, and prevent the buckling restrained brace from being damaged. Even in the face of rare large earthquakes, the double-step energy dissipation can still be realized.

[0030] 5. The I-shaped structure can be formed by lapping, the main core material is stronger in rigidity and less prone to deformation under force, the seismic effect is extremely strong, and the seismic performance of the building structure is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 Parallel double-step buckling restrained brace three-dimensional structure for example 1

[0032] Figure 2 Parallel double-step buckling restrained brace three-dimensional structure for example 1

[0033] Figure 3 Main core material and auxiliary core material structure of parallel double-step buckling restrained brace for example 1

[0034] Figure 4 Main core material and auxiliary core material structure of parallel double-step buckling restrained brace for example 1

[0035] Figure 5 Partial enlarged view of parallel double-step buckling restrained brace for example 1

[0036] Figure 6 Exploded views of the main core material and secondary core material of the parallel double-buckling restraint brace in Example 1.

[0037] Figure 7 This is a schematic diagram of the parallel double-buckling restraint support core material structure of Example 2.

[0038] Figure 8 Exploded views of the main core material and secondary core material of the parallel double-buckling restraint brace in Example 2.

[0039] Figure 9 Service status diagram of the core material for a parallel double-stage buckling restraint brace

[0040] Among them, 1—constraint steel pipe, 2—end plate, 3—main core material, 4—secondary core material, 5—grouting material, 6—stiffening block, 7—baffle, 8—first limiting plate, 9—building, 10—parallel double-stage buckling restraint brace, and 11—second limiting plate. Detailed Implementation

[0041] The technical solution will now be described in detail with reference to the accompanying drawings of the embodiments of this utility model.

[0042] Example 1

[0043] like Figure 1 , Figure 2 The parallel double-stage buckling restraint brace shown includes: restraint steel pipe 1, end plate 2, main core material 3, secondary core material 4, grouting material 5, stiffening block 6, baffle 7, first limiting plate 8, and second limiting plate 11.

[0044] A restraint steel pipe 1 is sleeved on the outside of the main core material 3 and the secondary core material 4 to improve the overall support performance of the double buckling restraint brace and prevent the core material from becoming unstable.

[0045] Two end plates 2 are provided at the end of the constrained steel pipe 1, which enables the constrained steel pipe 1 to form a closed space. The end plates 2 increase the strength of the constrained steel pipe 1, making it more resistant to pressure. In addition, the end plates 2 can also prevent dust and increase the service life of the constrained steel pipe 1.

[0046] Grouting material 5 is filled between the restrained steel pipe 1 and the main core material 3 and the secondary core material 4 to prevent the main core material 3 and the secondary core material 4 from becoming unstable and to improve the overall structural stiffness of the double-buckling restraint brace.

[0047] like Figure 3 , Figure 6The main core material 3 is provided with one piece, the secondary core material 4 is provided with two pieces, the main core material 3 and the secondary core material 4 are overlapped into a cross shape, one end of the main core material 3 and the secondary core material 4 is flush and fixedly connected, which is used for improving the stability of the connection between the main core material 3 and the secondary core material 4; the other end of the main core material 3 is longer than the secondary core material 4, and the two are overlapped and connected, thereby providing a double-stage buckling compression space.

[0048] As shown in the drawings, Figure 3 The main core material 3 is provided with four stiffening blocks 6, which are arranged on both sides of the end of the main core material 3 connected with the secondary core material 4, so that the main core material 3 supports the force balance, which is used for improving the supporting force of the main core material 3 and preventing the main core material 3 from bending and breaking under stress.

[0049] As shown in the drawings, Figure 4 , Figure 5 The first limiting component is two stop blocks 7, which are arranged at the end of the main core material 3 and the secondary core material 4 connected with each other, and are fixedly arranged on both sides of the main core material 3, and a gap is arranged between the end of the secondary core material 4 and the stop block 7, thereby providing a force compression step-yield space; the second limiting component is composed of four first limiting plates 8 and four second limiting plates 11, the four second limiting plates 11 are arranged on both sides of the end of the secondary core material 4 by welding, and the four first limiting plates 8 are arranged on the stiffening blocks 6 by welding; a gap is arranged between the first limiting plate 8 of the stiffening block 6 and the second limiting plate 11 of the secondary core material 4, thereby providing a step-yield space for force stretching; when the main core material 3 and the secondary core material 4 are subjected to tension, the main core material 3 and the secondary core material 4 are deformed and displaced; when the second limiting plate 8 of the stiffening block 6 and the first limiting plate 11 of the secondary core material 4 are in contact, the main core material 3 and the secondary core material 4 are simultaneously subjected to stress and yield energy consumption.

[0050] The main core material 3 and the secondary core material 4 are wrapped with asphalt-coated coiled material 5 on the outside, thereby preventing the grouting material 4 from adhering to the main core material 3 and the secondary core material 4.

[0051] As shown in the drawings, Figure 1 , Figure 2 , Figure 5 The main core material 3 and the secondary core material 4 pass through two end plates 2 at both ends respectively, and are exposed outside the constraint steel pipe 3.

[0052] Example 2

[0053] As shown in the drawings, Figure 7 , Figure 8 Different from the first example, the main core material 3 is composed of three pieces and the secondary core material 4 is composed of two pieces; the three pieces of the main core material 3 are welded into an I-shaped structure, and the two pieces of the secondary core material 4 are overlapped in the middle of the I-shaped structure; one end of the main core material 3 and the secondary core material 4 is flush and fixedly connected, which is used for improving the stability of the connection between the main core material 3 and the secondary core material 4; the other end of the main core material 3 is longer than the secondary core material 4, and the two are overlapped and connected, thereby providing a double-stage buckling compression space.

[0054] The second limiting component is composed of four first limiting plates 8 and four second limiting plates 11, four second limiting plates 11 are respectively welded on both sides of one end of the secondary core material 4, four first limiting plates 8 are respectively welded on the primary core material 3, and a gap is arranged between the first limiting plate 8 of the primary core material 3 and the second limiting plate 11 of the secondary core material 4 to provide a staged yield space for force stretching, when the primary core material 3 and the secondary core material 4 are subjected to tension, the deformation displacement of the primary core material 3 and the secondary core material 4 occurs under the action of tension, when the first limiting plate 8 of the primary core material and the second limiting plate 11 of the secondary core material 4 are in contact, the primary core material and the secondary core material yield and consume energy under force.

[0055] As shown in Figure 9 , in use, according to the seismic use scene requirements of the building, the parallel type double-stage buckling restrained brace can be arranged according to the seismic requirements, for example: Figure 9 , two parallel type double-stage buckling restrained braces are arranged in a triangular shape, one parallel type double-stage buckling restrained brace is arranged in a single slope, and two parallel type double-stage buckling restrained braces are arranged in an X shape.

[0056] Specifically, the parallel type double-stage buckling restrained brace is first installed on the building, the primary core material 3 is fixedly connected with the building, when an earthquake occurs, the primary core material 3 is compressed under the pressure brought by the building, when small deformation occurs, the primary core material 3 yields and consumes energy, entering a first stage of yield; when the primary core material 3 is deformed under pressure, the primary core material 3 is displaced towards the end of the secondary core material 4, the baffle 8 is displaced towards the end of the secondary core material 4, after the baffle 8 contacts the end of the secondary core material 4, the secondary core material 4 yields and consumes energy under pressure, entering a second stage of yield.

[0057] When tension is generated by an earthquake, the primary core material 3 is stretched under force, when the generated tension is small, the primary core material 3 yields and consumes energy, entering a first stage of yield; when the tension exceeds the tension that the primary core material 3 can withstand, the limiting assembly cooperates with the primary core material 3 and the secondary core material 4, the primary core material 3 and the secondary core material 4 are deformed under tension, the first limiting plate 8 of the primary core material 3 and the second limiting plate 11 of the secondary core material 4 are displaced under force, when the first limiting plate 8 of the primary core material 3 contacts the second limiting plate 11 of the secondary core material 4, the primary core material 3 and the secondary core material 4 yield and consume energy under force, thereby realizing staged yield and energy consumption.

Claims

1. A parallel type double-stage buckling-restrained brace, characterized in that it comprises: a main core material (3) and a secondary core material (4), the main core material (3) and the secondary core material (4) being sleeved outside a restrained steel pipe (1), the restrained steel pipe (1) being provided with an end plate (2) at an end thereof, the main core material (3) and the secondary core material (4) being provided with a limiting assembly at one end thereof, the main core material (3) and the secondary core material (4) being moved in cooperation with the limiting assembly to realize stage yielding energy dissipation, the restrained steel pipe (1) being filled with grouting material (5) between the main core material (3) and the secondary core material (4) to prevent instability of the main core material (3) and the secondary core material (4) and improve stability of the double-stage buckling-restrained brace as a whole when compressed, the main core material (3) being provided in one piece, the secondary core material (4) being provided in two pieces, the main core material (3) and the secondary core material (4) being fixedly connected by local welding at one end thereof with the length being flush, and the main core material (3) being connected by lapping at the other end thereof with the length being greater than that of the secondary core material (4) to provide a double-stage buckling compression space, the limiting assembly comprising a first limiting component and / or a second limiting component, the parallel type double-stage buckling-restrained brace being stage-yielded under pressure after the first limiting component is subjected to the pressure, and the parallel type double-stage buckling-restrained brace being stage-yielded under tension after the second limiting component is subjected to the tension, the main core material (3) being fixedly provided with four stiffening blocks (6) on the main core material (3) at both sides of one end of the main core material (3) connected by lapping with the secondary core material (4) to balance the stress supported by the main core material (3), the first limiting component being two stop blocks (7) provided at one end of the main core material (3) connected by lapping with the secondary core material (4) and fixedly provided at both sides of the main core material (3), a gap being provided between the end of the secondary core material (4) and the stop blocks (7) to provide a stage-yield space for stress compression, the second limiting component comprising four first limiting plates (8) and four second limiting plates (11), the four second limiting plates (11) being separately welded at both sides of one end of the secondary core material (4), the four first limiting plates (8) being separately welded to the stiffening blocks (6), and a gap being provided between the first limiting plates (8) of the stiffening blocks (6) and the second limiting plates (11) of the secondary core material (4) to provide a stage-yield space for stress tension, the end plate (2) being provided in two pieces and arranged at the end of the restrained steel pipe (1) to enable the restrained steel pipe (1) to form a closed space, the main core material (3) and the secondary core material (4) passing through the two end plates (2) at both ends thereof and being exposed outside the restrained steel pipe (1), and the main core material (3) and the secondary core material (4) being wrapped with asphalt coiled material outside the main core material (3) and the secondary core material (4) to prevent the grouting material (5) from adhering to the main core material (3) and the secondary core material (4). ​ ​ ​ ​ ​ ​ 2. The parallel dual-stage buckling-restrained brace according to claim 1, characterized in that: ​ 3. The parallel dual-stage buckling-restrained brace according to claim 1, wherein: ​ 4. The parallel dual-stage buckling-restrained brace according to claim 2, characterized in that: ​ 5. The parallel dual-stage buckling-restrained brace according to claim 1, wherein: ​ 6. The parallel dual-stage buckling-restrained brace according to claim 1, characterized by: ​ ​ 7. The parallel dual-stage buckling-restrained brace according to claim 1, wherein: The main core material (3) and the auxiliary core material (4) are arranged in an I-shaped cross section and are composed of three main core materials (3) and two auxiliary core materials (4); the three main core materials (3) are welded into an I-shaped structure, and the two auxiliary core materials (4) are overlapped in the middle of the I-shaped structure; the second limiting component is composed of four first limiting plates (8) and four second limiting plates (11); four second limiting plates (11) are respectively welded on the two sides of one end of the auxiliary core material (4); four first limiting plates (8) are respectively welded on the main core material (3); and a gap is arranged between the first limiting plate (8) of the main core material (3) and the second limiting plate (11) of the auxiliary core material (4) to provide a hierarchical yielding space for force stretching.

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