Two-way shear damper and method for judging fatigue of two-way shear damper

Abstract

The application discloses a bidirectional shear damper, which comprises a connecting assembly, a first energy dissipation assembly, a second energy dissipation assembly and a third energy dissipation assembly. The connecting assembly comprises a first connecting piece and a second connecting piece. The two ends of the first energy dissipation assembly are connected with the first connecting piece and the second connecting piece respectively. The second energy dissipation assembly comprises a first energy dissipation piece and a second energy dissipation piece which are oppositely arranged along a first direction. The first energy dissipation assembly is located between the first energy dissipation piece and the second energy dissipation piece. The third energy dissipation assembly comprises a third energy dissipation piece and a fourth energy dissipation piece which are oppositely arranged along a second direction. The first energy dissipation assembly is located between the third energy dissipation piece and the fourth energy dissipation piece. The first direction and the second direction are staggered to reduce the shear force on the first energy dissipation assembly, slow down the deformation of the first energy dissipation assembly and prolong the fatigue life of the bidirectional shear damper. In addition, a fatigue prediction method of the bidirectional shear damper is also provided, which can accurately predict the fatigue life of the bidirectional shear damper.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building seismic resistance, and in particular to a bidirectional shear damper and a fatigue judgment method of the bidirectional shear damper. BACKGROUND

[0002] Under the action of an earthquake, a conventional building structure inevitably suffers damage, and the introduction of an energy dissipation component can effectively dissipate seismic energy, so that the deformation of the structure is mainly concentrated in the energy dissipation component, thereby reducing or even avoiding the damage of the earthquake to the building structure. As a passive control device in the field of structural energy dissipation and disaster prevention and mitigation, a shear type metal damper has simple structure and low cost, and is therefore widely used in the field of seismic resistance.

[0003] As is known, the actual earthquake input direction is random and unpredictable, and the shear type damper will exhibit a bidirectional coupling deformation characteristic under the action of an earthquake. In order to adapt to the bidirectional coupling deformation, a bidirectional shear damper has emerged. The energy dissipation assembly of the commonly used bidirectional shear damper is of a cross-shaped structure, and the energy dissipation assembly has a single structure. The energy dissipation assembly is prone to large plastic deformation, which reduces the fatigue life of the bidirectional shear damper. SUMMARY

[0004] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides a bidirectional shear damper capable of improving the fatigue life of the bidirectional shear damper.

[0005] The present application also provides a fatigue judgment method of a bidirectional shear damper for judging the fatigue life of the bidirectional shear damper.

[0006] The bidirectional shear damper according to the first aspect of the present application comprises a connecting assembly, a first energy dissipation assembly, a second energy dissipation assembly and a third energy dissipation assembly. The connecting assembly comprises oppositely arranged first and second connecting members. The two ends of the first energy dissipation assembly are connected to the first and second connecting members, respectively. The second energy dissipation assembly comprises oppositely arranged first and second energy dissipation members along a first direction. The first energy dissipation assembly is located between the first and second energy dissipation members. The two ends of the first energy dissipation member are connected to the first and second connecting members, respectively. The two ends of the second energy dissipation member are connected to the first and second connecting members, respectively. The third energy dissipation assembly comprises oppositely arranged third and fourth energy dissipation members along a second direction. The first energy dissipation assembly is located between the third and fourth energy dissipation members. The two ends of the third energy dissipation member are connected to the first and second connecting members, respectively. The two ends of the fourth energy dissipation member are connected to the first and second connecting members, respectively. The first direction and the second direction are arranged in a staggered manner.

[0007] The bidirectional shear damper according to the first aspect of the present application has at least the following advantages

[0008] Advantages:

[0009] The two ends of the first energy consumption component are connected with the first connecting member and the second connecting member by welding, the first energy consumption component is accommodated in the accommodating space, the first energy consumption component and the second energy consumption component can bear the shear force in the first direction, and the third energy consumption component and the fourth energy consumption component can bear the shear force in the second direction, so that the shear force borne by the first energy consumption component is reduced, the deformation of the first energy consumption component is slowed down, and the fatigue life of the bidirectional shear damper is improved.

[0010] According to some embodiments of the present application, the first energy consumption component is connected with the first reinforcing member on one side in the first direction.

[0011] According to some embodiments of the present application, the first energy consumption component is connected with the second reinforcing member on the side away from the first reinforcing member.

[0012] According to some embodiments of the present application, the first reinforcing member and the second reinforcing member are detachably connected with the first energy consumption component by a fastening assembly.

[0013] According to some embodiments of the present application, the first energy consumption component comprises a fifth energy consumption component and a sixth energy consumption component arranged perpendicularly to each other, and the fifth energy consumption component and the sixth energy consumption component are in a cross-shaped structure.

[0014] According to some embodiments of the present application, the first direction is arranged in parallel with the thickness direction of the fifth energy consumption component, and the first direction is arranged perpendicularly to the second direction.

[0015] According to some embodiments of the present application, a welding structure is arranged between the fifth energy consumption component and the sixth energy consumption component.

[0016] According to some embodiments of the present application, the two sides of the first energy consumption component are provided with first grooves in the second direction, and the bottom wall of the first groove is in an arc-shaped structure.

[0017] According to some embodiments of the present application, the first groove has a first side wall and a second side wall arranged oppositely, and the distance between the first side wall and the second side wall gradually decreases in the recess direction of the first groove.

[0018] The fatigue judgment method of the bidirectional shear damper according to the second aspect of the present application is used for judging the fatigue life of the bidirectional shear damper, and comprises the following steps:

[0019] Step 1: Decompose the motion trajectory of the bidirectional shear damper into two displacements in the x and y directions that are perpendicular to each other;

[0020] Step 2: Process the displacement of the energy-consuming component in the x and y directions using the rainflow counting method to obtain n displacement amplitudes δ of the energy-consuming component in the x direction. x Obtain the n displacement amplitudes δ of the energy-consuming component in the y direction. y , n≥1, and n is an integer;

[0021] Step 3: Calculate the strain amplitude γ of the energy-dissipating component in the x-direction. x γ x =δx / h, calculate the strain amplitude γ of the energy-dissipating component in the y-direction. y γ y =δy / h, where h is the height of the energy-consuming component;

[0022] Step 4: Calculate the fatigue life N of the energy-consuming component in the x-direction. x N x =α(γ) x ) β Calculate the fatigue life N of the energy-consuming component in the y-direction. y N y =α(γ) y ) β Wherein, α is the fatigue ductility constant of the material of the energy-consuming component, and β is the fatigue ductility index of the material of the energy-consuming component;

[0023] Step 5: Calculate the cumulative damage D of the energy-consuming component in the x-direction according to the Miner damage accumulation criterion. x Calculate the cumulative damage D of the energy-consuming component in the y-direction. y ,in,

[0024]

[0025]

[0026] Step 6: Calculate the total damage D of the energy-consuming component, D = D x +D y When D=1, it is determined that the bidirectional shear damper has reached its fatigue life limit.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 Structure diagram of a bidirectional shear damper according to an embodiment of the present application;

[0030] Figure 2 Exploded view of a bidirectional shear damper according to an embodiment of the present application;

[0031] Figure 3 Front view of a bidirectional shear damper according to an embodiment of the present application;

[0032] Figure 4 is Figure 3 Cross-sectional view along line A-A.

[0033] Reference numerals:

[0034] First connecting member 110, second connecting member 120, first energy dissipation assembly 200, fifth energy dissipation member 210, sixth energy dissipation member 220, first energy dissipation member 310, first recess 311, second energy dissipation member 320, third energy dissipation member 410, fourth energy dissipation member 420, first reinforcing member 510, second reinforcing member 520, third reinforcing member 530, fourth reinforcing member 540, fifth reinforcing member 550, sixth reinforcing member 560, seventh reinforcing member 570, eighth reinforcing member 580, fastening assembly 600. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which like numerals indicate like elements or elements having the same or similar function throughout the several views. The embodiments described below are exemplary only, and are not to be construed as limiting the present application.

[0036] In the description of the present application, if the orientation description, such as up, down, front, back, left, right, etc. is involved, the orientation or positional relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number itself, and above, below, etc. are understood as including the number itself. If the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0038] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense unless otherwise explicitly limited, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0039] With reference to Figures 1 to 4 The bidirectional shear damper according to the first aspect of the present application comprises a connecting assembly, a first energy dissipation assembly 200, a second energy dissipation assembly and a third energy dissipation assembly. The connecting assembly comprises a first connecting piece 110 and a second connecting piece 120 arranged oppositely. The two ends of the first energy dissipation assembly 200 are connected to the first connecting piece 110 and the second connecting piece 120 respectively. The second energy dissipation assembly comprises a first energy dissipation piece 310 and a second energy dissipation piece 320 arranged oppositely along a first direction. The first energy dissipation assembly 200 is located between the first energy dissipation piece 310 and the second energy dissipation piece 320. The two ends of the first energy dissipation piece 310 are connected to the first connecting piece 110 and the second connecting piece 120 respectively. The two ends of the second energy dissipation piece 320 are connected to the first connecting piece 110 and the second connecting piece 120 respectively. The third energy dissipation assembly comprises a third energy dissipation piece 410 and a fourth energy dissipation piece 420 arranged oppositely along a second direction. The first energy dissipation assembly 200 is located between the third energy dissipation piece 410 and the fourth energy dissipation piece 420. The two ends of the third energy dissipation piece 410 are connected to the first connecting piece 110 and the second connecting piece 120 respectively. The two ends of the fourth energy dissipation piece 420 are connected to the first connecting piece 110 and the second connecting piece 120 respectively. The first direction and the second direction are arranged alternately. In this way, by arranging the second energy dissipation assembly and the third energy dissipation assembly, the second energy dissipation assembly can bear the shear force in the first direction for the first energy dissipation assembly 200, and the third energy dissipation assembly can bear the shear force in the second direction for the first energy dissipation assembly 200, so as to reduce the shear force borne by the first energy dissipation assembly 200 and slow down the deformation of the first energy dissipation assembly 200, thereby improving the fatigue life of the bidirectional shear damper.

[0040] Specifically, the two ends of the first energy dissipation assembly 200 are connected to the first connecting piece 110 and the second connecting piece 120 by welding. The first energy dissipation piece 310, the second energy dissipation piece 320, the third energy dissipation piece 410 and the fourth energy dissipation piece 420 enclose a containing space. The first energy dissipation assembly 200 is accommodated in the containing space. The first energy dissipation piece 310 and the second energy dissipation piece 320 can bear the shear force in the first direction for the first energy dissipation assembly 200. The third energy dissipation piece 410 and the fourth energy dissipation piece 420 can bear the shear force in the second direction for the first energy dissipation assembly 200, so as to reduce the shear force borne by the first energy dissipation assembly 200 and slow down the deformation of the first energy dissipation assembly 200, thereby improving the fatigue life of the bidirectional shear damper.

[0041] It should be noted that the material of the first energy dissipation member 310, the second energy dissipation member 320, the third energy dissipation member 410 and the fourth energy dissipation member 420 can be low yield point steel material, which can yield and perform plastic energy dissipation under the action of earthquake, thereby improving the fatigue life of the bidirectional shear damper, and the first energy dissipation member 310, the second energy dissipation member 320, the third energy dissipation member 410 and the fourth energy dissipation member 420 have simple structure and are easy to be automatically processed, which is convenient for later maintenance, and details are not described herein.

[0042] It should be noted that the first energy dissipation member 310, the second energy dissipation member 320, the third energy dissipation member 410 and the fourth energy dissipation member 420 are welded with the first connecting member 110 and the second connecting member 120 by full penetration welding process to ensure the strength. After welding, the welds need to be ultrasonic hammered or heat treated (such as annealing or tempering, etc.) to ensure the fatigue life of the welded position, and details are not described herein.

[0043] It should be noted that the first energy dissipation member 310, the second energy dissipation member 320, the third energy dissipation member 410 and the fourth energy dissipation member 420 are welded with the first connecting member 110 and the second connecting member 120 by full penetration welding process to ensure the strength. After welding, the welds need to be ultrasonic hammered or heat treated (such as annealing or tempering, etc.) to ensure the fatigue life of the welded position, and details are not described herein.

[0044] It should be noted that the first connecting member 110 and the second connecting member 120 are used to be connected with the main structure of the building, and details are not described herein.

[0045] In some embodiments of the present application, along the first direction, one side of the first energy dissipation member 310 is connected with the first reinforcing member 510, which can improve the structural stability of the first energy dissipation member 310 to reduce out-of-plane instability of the first energy dissipation member 310 under the shear force in the first direction, and can improve the fatigue life of the first energy dissipation member 310, thereby improving the fatigue life of the bidirectional shear damper.

[0046] In some embodiments of the present application, the side of the first energy dissipation member 310 away from the first reinforcing member 510 is connected with the second reinforcing member 520, which can improve the structural stability of the first energy dissipation member 310 to reduce out-of-plane instability of the first energy dissipation member 310 under the shear force in the first direction, and can improve the fatigue life of the first energy dissipation member 310, thereby improving the fatigue life of the bidirectional shear damper.

[0047] Specifically, the first reinforcing member 510 and the second reinforcing member 520 are oppositely arranged along the first direction, and the first energy dissipation member 310 is clamped between the first reinforcing member 510 and the second reinforcing member 520, which can improve the structural stability of the first energy dissipation member 310 to reduce out-of-plane instability of the first energy dissipation member 310 under the shear force in the first direction, and can improve the fatigue life of the first energy dissipation member 310, thereby improving the fatigue life of the bidirectional shear damper.

[0048] It should be noted that under the reciprocating action of the earthquake, the first energy consumption piece 310 is subjected to repeated tension and compression and is in a complex stress state, and by arranging the first reinforcing piece 510 and the second reinforcing piece 520, the out-of-plane buckling instability or the weld fracture under repeated tension and compression can be avoided, the mechanical properties of the bidirectional shear damper are ensured to be continuously stable, and the stability and reliability of the energy dissipation performance of the bidirectional shear damper are improved.

[0049] In some embodiments of the present application, the first reinforcing piece 510 and the second reinforcing piece 520 are detachably connected with the first energy consumption piece 310 through the fastening assembly 600, without the need to fix the first reinforcing piece 510 and the second reinforcing piece 520 by welding, so that the welding process of the bidirectional shear damper can be reduced, and the assembly process of the bidirectional shear damper can be simplified.

[0050] Specifically, the fastening assembly 600 includes a bolt, a nut and a gasket, the bolt is sequentially arranged in the first reinforcing piece 510, the first energy consumption piece 310 and the second reinforcing piece 520, the nut of the bolt abuts against the first reinforcing piece 510, the nut is threadedly connected with the bolt, and the nut abuts against the second reinforcing piece 520, without the need to fix the first reinforcing piece 510 and the second reinforcing piece 520 by welding, so that the welding process of the bidirectional shear damper can be reduced, and the assembly process of the bidirectional shear damper can be simplified.

[0051] It should be noted that the fastening assembly 600 can also only include a bolt, the bolt is sequentially arranged in the first reinforcing piece 510, the first energy consumption piece 310 and the second reinforcing piece 520, the nut of the bolt abuts against the first reinforcing piece 510, and the shank of the bolt is threadedly connected with the second reinforcing piece 520, so that the first reinforcing piece 510 and the second reinforcing piece 520 can be relatively fixed, which is not described in detail here.

[0052] In some embodiments of the present application, the first energy consumption assembly 200 includes a fifth energy consumption piece 210 and a sixth energy consumption piece 220 arranged perpendicularly to each other, and the fifth energy consumption piece 210 and the sixth energy consumption piece 220 are in a cross-shaped structure, so as to ensure that the first energy consumption assembly 200 is balanced under bidirectional stress.

[0053] Specifically, the two ends of the fifth energy consumption piece 210 are connected with the first connecting piece 110 and the second connecting piece 120 respectively, and the two ends of the sixth energy consumption piece 220 are connected with the first connecting piece 110 and the second connecting piece 120 respectively, and the cross-shaped structure can ensure that the first energy consumption assembly 200 is balanced under bidirectional stress.

[0054] In some embodiments of the present application, the first direction is parallel to the thickness direction of the fifth energy dissipation member 210, and the first direction is perpendicular to the second direction, so that the second energy dissipation assembly and the third energy dissipation assembly can directly bear bidirectional shear force, thereby reducing the bidirectional shear force borne by the fifth energy dissipation member 210 and the sixth energy dissipation member 220.

[0055] Of course, in some embodiments, the first direction can also be arranged at an angle with the thickness direction of the fifth energy dissipation member 210, and the angle between the first direction and the thickness direction of the fifth energy dissipation member 210 can be an acute angle or an obtuse angle, which is not described in detail here.

[0056] In some embodiments of the present application, a welding structure is arranged between the fifth energy dissipation member 210 and the sixth energy dissipation member 220, which can facilitate the production of the first energy dissipation assembly 200. The welding method includes but is not limited to resistance welding, ultrasonic welding and laser welding.

[0057] It should be noted that the fifth energy dissipation member 210 and the sixth energy dissipation member 220 can also be an integrated structure, which can reduce the number of molds to reduce the production cost of the molds, thereby reducing the production cost of the bidirectional shear damper.

[0058] In some embodiments of the present application, along the second direction, the two sides of the first energy dissipation member 310 are provided with a first groove 311, and the bottom wall of the first groove 311 is an arc-shaped structure, which can avoid stress concentration of the first energy dissipation member 310 to avoid cracks of the first energy dissipation member 310, thereby improving the use reliability of the bidirectional shear damper.

[0059] In some embodiments of the present application, the first groove 311 has oppositely arranged first and second side walls, and the distance between the first and second side walls gradually decreases along the recess direction of the first groove 311, which can improve the structural strength of the first energy dissipation member 310.

[0060] It should be noted that the second energy dissipation member 320 is correspondingly connected with the third reinforcing member 530 and the fourth reinforcing member 540, and the second energy dissipation member 320 is clamped between the third reinforcing member 530 and the fourth reinforcing member 540, the third energy dissipation member 410 is correspondingly connected with the fifth reinforcing member 550 and the sixth reinforcing member 560, and the third energy dissipation member 410 is clamped between the fifth reinforcing member 550 and the sixth reinforcing member 560, the fourth energy dissipation member 420 is correspondingly connected with the seventh reinforcing member 570 and the eighth reinforcing member 580, and the fourth energy dissipation member 420 is clamped between the seventh reinforcing member 570 and the eighth reinforcing member 580, which is not limited here.

[0061] The fatigue judgment method of the bidirectional shear damper according to the second aspect of the present application is used to judge the fatigue life of the bidirectional shear damper, which includes the following steps:

[0062] Step 1: split the movement trajectory of the bidirectional shear damper into x and y two mutually perpendicular directions of displacement;

[0063] Step 2: process the displacement of the first energy dissipation component in x and y directions by rain flow counting method, obtain n displacement amplitudes δ x x of the energy dissipation component in x direction, n displacement amplitudes δ y y of the energy dissipation component in y direction, n≥1, and n is an integer;

[0064] Step 3: calculate the strain amplitude γ x x of the energy dissipation component in x direction, γ x x = δx / h, calculate the strain amplitude γ y y of the energy dissipation component in y direction, γ y y = δy / h, wherein h is the height of the energy dissipation component;

[0065] Step 4: calculate the fatigue life N x x of the energy dissipation component in x direction, N x x = α(γ x x) β , calculate the fatigue life N y y of the energy dissipation component in y direction, N y y = α(γ y y) β , wherein α is the fatigue ductility constant of the material of the energy dissipation component, and β is the fatigue ductility index of the material of the energy dissipation component;

[0066] Step 5: according to the Miner damage accumulation criterion, calculate the damage accumulation D x x of the energy dissipation component in x direction, calculate the damage accumulation D y y of the energy dissipation component in y direction, wherein D x x = Σ i = 1 n (N y x / N x(i) i) β, and D y y = Σ i = 1 n (N y(i) y / N x(i) i) β;

[0067]

[0068] Step 6: calculate the total damage D of the energy dissipation component, D = D x x + D y y, when D = 1, judge whether the energy dissipation component reaches the fatigue life limit, through steps 1 to 6, the fatigue life of the energy dissipation component can be accurately estimated whether it reaches the limit, so as to prevent the collapse of the main structure of the building caused by the damage of the damper.

[0069] It should be noted that i represents the number of cycles at the i-th stress level, N x(i) represents the fatigue life at the i-th stress level in x direction, and N y(i) represents the fatigue life at the i-th stress level in y direction.

[0070] It should be noted that when the material of the energy dissipation component is SS400 steel, the fatigue ductility parameter α of the SS400 steel is 0.0082, and the fatigue ductility index β is -2.5.

[0071] It should be noted that the energy dissipation component can be any one of the first energy dissipation component 200, the first energy dissipation piece 310, the second energy dissipation piece 320, the third energy dissipation piece 410, and the fourth energy dissipation piece 420, which will not be described in detail here.

[0072] It should be noted that the rainflow counting method can also be referred to as the "roof top method". The rainflow counting method is mainly used in the engineering field, and is particularly widely used in fatigue life calculation. The strain-time history data record is turned by 90°, the time coordinate axis is vertical downward, and the data record is like a series of roofs, rainwater flows down the roof, so it is called the rainflow counting method. The main function of the rainflow counting method is to simplify the measured load history into a number of load cycles for fatigue life estimation and preparation of fatigue test load spectrum. It is based on the two-parameter method, considering the dynamic strength (amplitude) and static strength (mean value) two variables, which conforms to the inherent characteristics of the fatigue load.

[0073] It should be noted that the Miner cumulative damage rule refers to an empirical rule in material science for studying material damage and fatigue fracture. It describes the damage accumulation process of materials under stress, and can be used to predict the life and fatigue fracture behavior of materials. The core idea of the Miner cumulative damage rule is that the life of the material depends on the cumulative effect of the stress history. Assuming that the material has different lives under different stress levels, a complete stress cycle can be regarded as the superposition of a series of different stress levels. According to the Miner cumulative damage rule, the life of the material can be calculated by calculating the damage accumulation under different stress levels, and then adding them up.

[0074] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0075] The above embodiments have been described in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the true spirit of the present application.

Claims

1. A bidirectional shear damper, characterized by, The utility model relates to a kind of two-way shear damper, comprising: Connecting assembly, including oppositely arranged first connecting piece (110) and second connecting piece (120); First energy dissipation component (200), two ends of the first energy dissipation component (200) are connected with the first connecting piece (110) and second connecting piece (120) respectively, and the first energy dissipation component (200) includes fifth energy dissipation piece (210) and sixth energy dissipation piece (220) arranged perpendicularly to each other, and the fifth energy dissipation piece (210) and the sixth energy dissipation piece (220) are in cross structure; Second energy dissipation component, including first energy dissipation piece (310) and second energy dissipation piece (320) arranged oppositely along first direction, and the first energy dissipation component (200) is located between the first energy dissipation piece (310) and the second energy dissipation piece (320), two ends of the first energy dissipation piece (310) are connected with the first connecting piece (110) and second connecting piece (120) respectively, and two ends of the second energy dissipation piece (320) are connected with the first connecting piece (110) and second connecting piece (120) respectively; Third energy dissipation component, including third energy dissipation piece (410) and fourth energy dissipation piece (420) arranged oppositely along second direction, and the first energy dissipation component (200) is located between the third energy dissipation piece (410) and the fourth energy dissipation piece (420), two ends of the third energy dissipation piece (410) are connected with the first connecting piece (110) and second connecting piece (120) respectively, and two ends of the fourth energy dissipation piece (420) are connected with the first connecting piece (110) and second connecting piece (120) respectively, and the first direction and the second direction are staggered arrangement; Along the first direction, one side of the first energy dissipation piece (310) is connected with first reinforcing piece (510), and the side of the first energy dissipation piece (310) away from the first reinforcing piece (510) is connected with second reinforcing piece (520); Along second direction, both sides of the first energy dissipation piece (310) are provided with first groove (311), the bottom wall of the first groove (311) is arc structure, the first groove (311) has oppositely arranged first side wall and second side wall, and the distance between the first side wall and the second side wall gradually decreases along the recess direction of the first groove (311).

2. The bidirectional shear damper of claim 1, wherein, The first reinforcing piece (510) and the second reinforcing piece (520) are detachably connected with the first energy dissipation piece (310) through fastening assembly (600).

3. The bidirectional shear damper of claim 1, wherein, The first direction is parallel to the thickness direction of the fifth energy dissipation piece (210), and the first direction and the second direction are perpendicular.

4. The bidirectional shear damper of claim 1, wherein, Welding structure is arranged between the fifth energy dissipation piece (210) and the sixth energy dissipation piece (220).

5. A fatigue determination method for a bidirectional shear damper for determining a fatigue life of the bidirectional shear damper, characterized by, The utility model relates to a kind of two-way shear damper, comprising: Step 1: the motion trajectory of two-way shear damper is split into x and y two mutually perpendicular directions displacement; Step 2: processing the displacement of the energy-consuming component in the x and y directions by the rain-flow counting method to obtain n displacement amplitudes δ x of the energy-consuming component in the x direction y of the energy-consuming component in the y direction n≥1, and n is an integer; Step 3: Calculate the strain amplitude γ of the energy-dissipating component in the x-direction. x γ x =δx / h, calculate the strain amplitude γ of the energy-dissipating component in the y-direction. y γ y =δy / h, where h is the height of the energy-consuming component; Step 4: calculating the fatigue life N of the energy dissipation component in the x direction x , x = a (y x ) β , calculating the energy dissipation component; the fatigue life N y , y = a (y y ) β , wherein a is the fatigue ductility constant of the material of the energy dissipation component, and β is the fatigue ductility index of the material of the energy dissipation component; Step 5: Calculate the damage accumulation D of the energy dissipation component in the x direction according to the Miner damage accumulation criterion x , Calculate the damage accumulation D of the energy dissipation component in the y direction y , wherein, Step 6: Calculate the total damage D of the energy dissipation component, D = D x + D y When D = 1, it is judged that the bidirectional shear damper reaches the fatigue life limit.

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