Detachable energy-absorbing beam and eccentric support member

Abstract

The present invention discloses a detachable energy-absorbing beam, which comprises a first transition section, an energy-absorbing beam section and a second transition section which are sequentially detachably connected along a first direction, the energy-absorbing beam section comprises a first upper flange plate, a first lower flange plate and a first web plate, the first upper flange plate and the first lower flange plate are arranged opposite to each other in the up-down direction, and the first upper flange plate and the first lower flange plate both extend along the first direction, the first web plate connects the bottom surface of the first upper flange plate and the top surface of the first lower flange plate, and the first web plate extends along the first direction; the energy-absorbing beam section satisfies: M s ≡μ·V S , or V S ≡μ·M s , where M s V is the full plastic bending bearing capacity of the energy dissipation beam segment; S is the full plastic shear bearing capacity of the energy-absorbing beam section; μ is a constant coefficient, and its value range is 1.1≤μ≤1.25, and it can be arbitrarily selected within the range. The detachable energy-absorbing beam of the present invention can fully exert the energy-absorbing capacity of the energy-absorbing beam section, and it is convenient for the staff to disassemble and replace the energy-absorbing beam section.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure buildings, in particular to a detachable energy-absorbing beam and an eccentric supporting member. Background Art

[0002] The seismic design of steel structure buildings is an important issue currently faced by structural engineers. According to earthquake damage surveys, the damage to steel structures under earthquakes is mostly local damage, which in turn causes overall damage. The eccentrically supported structure is a structural system with strong energy absorption capacity. The eccentrically supported energy absorption beam includes an energy absorption beam section and a non-energy absorption beam section connected to both ends of the energy absorption beam section, and the energy absorption beam section and the non-energy absorption beam section are formed in one piece.

[0003] However, when an earthquake occurs, only the web of the shear yield type energy absorbing beam section undergoes plastic deformation, and only the flange of the bending yield type energy absorbing beam section undergoes plastic deformation. The plastic deformation of both is not fully utilized, resulting in the inadequate utilization of the ability to dissipate seismic energy. Both the flange and the web of the bending shear type energy absorbing beam can undergo plastic deformation, but the plastic deformation of the flange and the web of the bending shear type energy absorbing beam occurs simultaneously, resulting in the acceleration of the decrease rate of the structural stiffness of the bending shear type energy absorbing beam and the deformation rate of the structure. Moreover, after the energy absorbing beam section undergoes plastic deformation and energy consumption, it is difficult to disassemble and replace, and the structure is difficult to repair. Summary of the invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] An eccentrically supported energy-absorbing beam segment structure is proposed in the related art. The conventional eccentrically supported energy-absorbing beam segment structure is usually designed as a shear yield type energy-absorbing beam segment or a bending yield type energy-absorbing beam segment.

[0006] However, the inventors found in the actual application process that when encountering an earthquake, only the web of the energy absorbing beam section of the shear yield type energy absorbing beam section undergoes shear plastic deformation, and the flange of the energy absorbing beam section does not undergo plastic deformation. Only the flange of the energy absorbing beam section of the bending yield type energy absorbing beam section undergoes plastic deformation, and the web of the energy absorbing beam section does not undergo plastic deformation. Therefore, the plastic deformation of the shear yield type energy absorbing beam section or the bending yield type energy absorbing beam section is not fully utilized, and the ability to dissipate earthquake energy is not fully utilized. It is necessary to further improve the energy dissipation effect and seismic performance of these two types of energy absorbing beam sections. In addition, both the flange and the web of the bending shear type energy absorbing beam can undergo plastic deformation, but the plastic deformation of the flange and the web of the bending shear type energy absorbing beam occurs simultaneously, resulting in the acceleration of the decrease rate of the structural stiffness of the bending shear type energy absorbing beam and the deformation rate of the structure, resulting in a large impact of earthquake disasters.

[0007] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the embodiments of the present invention provide a detachable energy-absorbing beam and an eccentric support member, which can fully exert the energy-absorbing capacity of the energy-absorbing beam section, reduce the speed of decrease of the structural stiffness of the energy-absorbing beam section and the disaster impact caused by the excessive deformation of the energy-absorbing beam section, and facilitate the staff to disassemble and replace the energy-absorbing beam section.

[0008] The detachable energy-absorbing beam and eccentric support member of the embodiment of the present invention comprises a first transition section, an energy-absorbing beam section and a second transition section which are sequentially detachably connected along a first direction, the energy-absorbing beam section comprises a first upper flange plate, a first lower flange plate and a first web plate, the first upper flange plate and the first lower flange plate are arranged opposite to each other in the up-down direction, and the first upper flange plate and the first lower flange plate both extend along the first direction, the first web plate connects the bottom surface of the first upper flange plate and the top surface of the first lower flange plate, and the first web plate extends along the first direction;

[0009] The energy absorbing beam section satisfies: M s ≡μ·V S , or V S ≡μ·M s ,

[0010] Among them, M s is the full plastic bending bearing capacity of the energy dissipation beam section;

[0011] V S is the full plastic shear bearing capacity of the energy dissipation beam segment;

[0012] μ is a constant coefficient, and its value range is 1.1≤μ≤1.25, and it can take any value within the range;

[0013] ≡ means equivalent to.

[0014] The detachable energy-absorbing beam of the embodiment of the present invention has an energy-absorbing beam section that satisfies M s ≡μ·V S When the earthquake occurs, the first web of the energy-absorbing beam section first undergoes shear yield plastic deformation, and the first upper flange plate and the first lower flange plate undergo plastic deformation later. The energy-absorbing beam section satisfies V S ≡μ·M sWhen the first upper flange plate and the first lower flange plate of the energy-absorbing beam section undergo plastic deformation first under the action of an earthquake, and the first web plate undergoes shear yield deformation later, so that the first web plate, the first upper flange plate and the first lower flange plate of the energy-absorbing beam section can all undergo plastic deformation under the action of an earthquake, which can avoid the first web plate, the first upper flange plate and the first lower flange plate from undergoing plastic deformation at the same time when an earthquake occurs, so that the energy-absorbing capacity of the detachable energy-absorbing beam section of the embodiment of the present invention can be fully exerted, and the structural stiffness of the energy-absorbing beam section can be avoided from decreasing too quickly, and the energy-absorbing beam section can be avoided from deforming too quickly, thereby reducing the impact of earthquake disasters. The first transition section is detachably connected to one end of the energy-absorbing beam section, and the second transition section is detachably connected to the other end of the energy-absorbing beam section, so that after the energy-absorbing beam section undergoes plastic deformation and consumes energy, the staff can disassemble and replace the energy-absorbing beam section, so that the detachable energy-absorbing beam section of the embodiment of the present invention is easy to repair.

[0015] In some embodiments, the energy dissipation beam segment satisfies: M ≥ V S l2 / 2, or V S ≥2·M s / l2,

[0016] Among them, M s is the full plastic bending bearing capacity of the energy dissipation beam section;

[0017] V S is the full plastic shear bearing capacity of the energy dissipation beam segment;

[0018] M is the design value of the bending moment resistance of the energy-absorbing beam section;

[0019] V is the design value of shear resistance of the energy-absorbing beam section;

[0020] l2 is the size of the energy absorbing beam section in the first direction.

[0021] In some embodiments, the energy absorbing beam section satisfies: R1≥max(S l1 ,S l2 ,......S li ......,S ln ) and R l / γ RE ≥η·max(S lE1 ,S lE2 ,......S lEi ......,S lEn ),in,

[0022] R l is the design value of resistance of the energy absorbing beam section;

[0023] S li is the design value of the basic combined effect of loads on the energy-absorbing beam section under non-seismic conditions;

[0024] S lEi is the design value of the basic combined effect of loads on the energy-absorbing beam section under earthquake conditions;

[0025] γ RE is the seismic adjustment factor of bearing capacity;

[0026] η is a constant magnification factor, which is greater than 1.0.

[0027] In some embodiments, the first upper flange plate and the first lower flange plate have the same size in the second direction, the second direction is orthogonal to the first direction and the up-down direction, and the size of the first upper flange plate and the first lower flange plate in the second direction satisfies: b2=[(0.29·μ·l2-0.25·h2)·h2·t w2 ] / [t f2 (h2+t f2 )];in,

[0028] b2 is the size of the first upper flange plate or the first lower flange plate in the second direction;

[0029] t f2 is the size of the first upper flange plate or the first lower flange plate in the up-down direction;

[0030] t w2 is the dimension of the first web in the second direction;

[0031] h2 is the dimension of the first web in the up-down direction;

[0032] l2 is the size of the energy absorbing beam section in the first direction;

[0033] μ is a constant coefficient, and its value range is 1.1≤μ≤1.25.

[0034] In some embodiments, the first upper flange plate, the first lower flange plate, and the first web plate satisfy: in,

[0035] b2 is the size of the first upper flange plate or the first lower flange plate in the second direction;

[0036] t f2 is the size of the first upper flange plate or the first lower flange plate in the up-down direction;

[0037] t w2 is the dimension of the first web in the second direction;

[0038] h2 is the dimension of the first web in the up-down direction;

[0039] l2 is the size of the energy absorbing beam section in the first direction;

[0040] μ is a constant coefficient, and its value range is 1.1≤μ≤1.25.

[0041] In some embodiments, each of the first transition section and the second transition section includes a second upper flange plate, a second lower flange plate and a second web plate, the second upper flange plate and the second lower flange plate are relatively arranged, and the second upper flange plate and the second lower flange plate both extend along the first direction, the second web plate connects the bottom surface of the second upper flange plate and the top surface of the second lower flange plate, and the second web plate extends along the first direction.

[0042] In some embodiments, the first transition section and the second transition section satisfy:

[0043] R g ≥max(S g1 ,S g2 ,......S gi ......,S gn );

[0044] R g / γ RE ≥η·max(α1·S gE1 ,α2·S gE2 ,......α i ·S gEi ……,α n ·S gEn );

[0045]

[0046] in,

[0047] R g is the design resistance value of the first transition section or the second transition section;

[0048] S gi is the design value of the basic combined effect of loads of the first transition section or the second transition section under non-seismic conditions;

[0049] S gEi is the design value of the basic combined effect of loads of the first transition section or the second transition section under earthquake conditions;

[0050] M s is the full plastic bending bearing capacity of the energy dissipation beam section;

[0051] V s is the full plastic shear bearing capacity of the energy dissipation beam segment;

[0052] M slEi is the design value of the basic combined effect bending moment of the energy-absorbing beam section under earthquake conditions;

[0053] V slEi is the design value of shear force of the basic combined effect of loads of the energy-absorbing beam section under earthquake conditions;

[0054] γ RE is the seismic adjustment coefficient of the bearing capacity.

[0055] η is a constant magnification coefficient, which is greater than 1.0. In some embodiments, the detachable energy-absorbing beam further comprises a first connecting member and a second connecting member, wherein the first connecting member is disposed between the first transition section and the energy-absorbing beam section and is used to detachably connect the first transition section and the energy-absorbing beam section, and the second connecting member is disposed between the second transition section and the energy-absorbing beam section and is used to detachably connect the second transition section and the energy-absorbing beam section.

[0056] In some embodiments, the first connecting member includes: a first connecting plate, the first connecting plate is arranged on the top surface of the first upper flange plate and the second upper flange plate; a second connecting plate, the second connecting plate and the first connecting plate are arranged opposite to each other, and the second connecting plate is arranged on the bottom surface of the first lower flange plate and the second lower flange plate; a third connecting plate, the third connecting plate is arranged between the first connecting plate and the second connecting plate, and the third connecting plate is tightly attached to the first web plate and the second web plate; a fastener, the fastener is used to connect the first connecting plate and the first upper flange plate and the second upper flange plate, the second connecting plate and the first lower flange plate and the second lower flange plate, and the third connecting plate and the first web plate and the second web plate.

[0057] In some embodiments, the design value of the connection bending moment resistance of the fastener is higher than the full plastic bending bearing capacity of the energy absorbing beam section, and the design value of the shear resistance of the fastener is higher than the full plastic shear bearing capacity of the energy absorbing beam section.

[0058] In some embodiments, the fastener satisfies:

[0059]

[0060] in, is the design value of the connection bending moment and shear resistance of the fastener at the connection between the energy absorbing beam section and the first transition section or the second transition section;

[0061] R bolt,iThe bearing capacity of any of the fasteners at the connection node where the energy-absorbing beam section is connected to the first transition section or the second transition section through the fasteners;

[0062] For the connection node where the energy absorbing beam section is connected to the first transition section or the second transition section through the fastener, the full plastic bending bearing capacity of the energy absorbing beam section is used to replace the load combination effect bending moment design value at the node, and the load effect force of any of the fasteners;

[0063] For the connection node where the energy absorbing beam section is connected to the first transition section or the second transition section through the fastener, the full plastic shear bearing capacity of the energy absorbing beam section is used to replace the load combination effect bending moment design value at the node, and the load effect force of any of the fasteners;

[0064] M s 、V s are the full plastic bending bearing capacity and the full plastic shear bearing capacity of the energy dissipation beam segment;

[0065] η is a constant magnification factor, which is greater than 1.0.

[0066] In some embodiments, the detachable energy-absorbing beam also includes a stiffening plate, at least two of which are provided, and at least two of the stiffening plates are respectively provided on both sides of the first web in the second direction, the upper end of the stiffening plate is connected to the bottom surface of the first upper flange plate, the lower end of the stiffening plate is connected to the top surface of the first lower flange plate, the side edges of the stiffening plate are connected to the side surfaces of the first web, the at least two stiffening plates are divided into multiple groups, each group of the stiffening plates includes two stiffening plates arranged at intervals along the second direction, and multiple groups of the stiffening plates are arranged at intervals along the first direction.

[0067] The eccentric support member of the embodiment of the present invention comprises a first non-energy absorbing beam section, a second non-energy absorbing beam section and a detachable energy absorbing beam, wherein the detachable energy absorbing beam is the detachable energy absorbing beam described in any one of the above embodiments, the first non-energy absorbing beam section and the second non-energy absorbing beam section extend along the first direction, one end of the first non-energy absorbing beam section is connected to an end of the first transition section away from the energy absorbing beam section, and one end of the second non-energy absorbing beam section is connected to an end of the second transition section away from the energy absorbing beam section.

[0068] The eccentric support member of the embodiment of the present invention can fully utilize the energy absorption capacity of the detachable energy absorption beam section, and can also prevent the structural stiffness of the energy absorption beam section from decreasing too quickly, thereby reducing the impact of earthquake disasters. In addition, the staff can also dismantle and replace the energy absorption beam section that has undergone plastic deformation and consumed energy, thereby facilitating the repair of the eccentric support member of the embodiment of the present invention.

[0069] In some embodiments, the first non-energy absorbing beam segment and the second non-energy absorbing beam segment satisfy:

[0070] R b ≥max(S b1 ,S b2 ,……S bi ……,S bn );

[0071] R b / γ RE ≥η·max(α1·S bE1 ,α2·S bE2 ,......α i ·S bEi ……,α n ·S bEn );

[0072] in,

[0073] R b is the design resistance value of the first non-energy absorbing beam section or the second non-energy absorbing beam section;

[0074] S bi is the design value of the basic combined effect of loads of the first non-energy absorbing beam section or the second non-energy absorbing beam section under non-seismic conditions;

[0075] S bEi is the design value of the basic combined effect of loads of the first non-energy absorbing beam section or the second non-energy absorbing beam section under earthquake conditions;

[0076] M s is the full plastic bending bearing capacity of the energy dissipation beam section;

[0077] V s is the full plastic shear bearing capacity of the energy dissipation beam segment;

[0078] M slEi is the design value of the basic combined effect bending moment of the energy-absorbing beam section under earthquake conditions;

[0079] V slEi is the design value of shear force of the basic combined effect of loads of the energy-absorbing beam section under earthquake conditions;

[0080] γ RE is the seismic adjustment coefficient of the bearing capacity.

[0081] η is a constant magnification factor, which is greater than 1.0.

[0082] In some embodiments, the eccentric support member further includes a first support segment and a second support segment, one end of the first support segment is connected to a bottom surface of one end of the first non-energy-absorbing beam segment close to the detachable energy-absorbing beam, the other end of the first support segment extends in a downward direction and is inclined in a direction away from the detachable energy-absorbing beam, one end of the second support segment is connected to a bottom surface of the other end of the second non-energy-absorbing beam segment close to the detachable energy-absorbing beam, and the other end of the second support segment is inclined in a downward direction and in a direction away from the detachable energy-absorbing beam.

[0083] In some embodiments, the first support segment and the second support segment satisfy:

[0084] R c ≥max(S c1 ,S c2 ,......S ci ......,S cn );

[0085] R c / γ RE ≥η·max(α1·S cE1 ,α2·S cE2 ,......α i ·S cEi ……,α n ·S cEn );

[0086] in,

[0087] R c is the design resistance value of the first supporting segment or the second supporting segment;

[0088] S ci is the design value of the basic combined effect of loads of the first supporting section or the second supporting section in non-seismic conditions;

[0089] S cEi is the design value of the basic combined effect of loads of the first supporting section or the second supporting section under earthquake conditions;

[0090] M s is the full plastic bending bearing capacity of the energy dissipation beam section;

[0091] V s is the full plastic shear bearing capacity of the energy dissipation beam segment;

[0092] M slEi is the design value of the basic combined effect bending moment of the energy-absorbing beam section under earthquake conditions;

[0093] V slEiis the design value of shear force of the basic combined effect of loads of the energy-absorbing beam section under earthquake conditions;

[0094] γ RE is the seismic adjustment coefficient of the bearing capacity.

[0095] η is a constant magnification factor, which is greater than 1.0. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] Figure 1 It is a schematic structural diagram of a detachable energy-absorbing beam and an eccentric supporting member according to an embodiment of the present invention.

[0097] Figure 2 4 is a top view of a detachable energy-absorbing beam and an eccentric supporting member according to an embodiment of the present invention.

[0098] Figure 3 yes Figure 1 Schematic diagram of the cross section of AA.

[0099] Figure 4 yes Figure 1 Schematic diagram of the cross section of BB.

[0100] Figure 5 yes Figure 1 Schematic cross-section of CC.

[0101] Figure 6 yes Figure 1 Schematic cross-section of the DD.

[0102] Figure numerals: 1. detachable energy-absorbing beam; 11. first transition section; 111. second upper flange plate; 112. second lower flange plate; 113. second web plate; 12. energy-absorbing beam section; 121. first upper flange plate; 122. first lower flange plate; 123. first web plate; 13. second transition section; 14. first connecting member; 15. second connecting member; 151. first connecting plate; 152. second connecting plate; 153. third connecting plate; 154. fastener; 16. stiffening plate; 2. first non-energy-absorbing beam section; 21. third upper flange plate 21; 22. third lower flange plate 22; 23. third web plate 23; 3. second non-energy-absorbing beam section; 4. first supporting section; 5. second supporting section. DETAILED DESCRIPTION

[0103] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0104] like Figure 1-6 As shown, the detachable energy-absorbing beam according to the embodiment of the present invention includes a first direction (such as Figure 1The first transition section 11, the energy absorbing beam section 12 and the second transition section 13 are detachably connected in sequence (from left to right as shown). Specifically, the right end of the first transition section 11 is detachably connected to the left end of the energy absorbing beam section 12, and the left end of the second transition section 13 is detachably connected to the right end of the energy absorbing beam section 12, so that after the energy absorbing beam section 12 undergoes plastic deformation and consumes energy, the staff can disassemble and replace the energy absorbing beam section 12, so that the detachable energy absorbing beam section of the embodiment of the present invention is easy to repair.

[0105] like Figure 5 As shown, the energy absorbing beam section 12 includes a first upper flange plate 121, a first lower flange plate 122 and a first web plate 123. The first upper flange plate 121 and the first lower flange plate 122 are arranged opposite to each other in the up-down direction, and both the first upper flange plate 121 and the first lower flange plate 122 extend in the first direction. The first web plate 123 connects the bottom surface of the first upper flange plate 121 and the top surface of the first lower flange plate 122, and the first web plate 123 extends in the first direction. Specifically, the first upper flange plate 121 and the second upper flange plate 111 can be made of Q235 steel or Q345 steel, and the first web plate 123 can also be made of Q235 steel or Q345 steel. The first web plate 123 is welded to the bottom surface of the first upper flange plate 121 and the top surface of the first lower flange plate 122 to stabilize the structure of the energy absorbing beam section 12.

[0106] Energy dissipation beam segment 12 satisfies: M s ≡μ·V S , or V S ≡μ·M s ,

[0107] Among them, M s is the full plastic bending bearing capacity of the energy dissipation beam segment 12;

[0108] V S is the full plastic shear bearing capacity of the energy dissipation beam segment 12;

[0109] ≡ means equivalent to. It represents a causal condition. When the condition on the right side of the symbol “≡” is met, the result on the left side of the symbol “≡” occurs.

[0110] μ is a constant coefficient, and its value range is 1.1≤μ≤1.25, and it can take any value within the range.

[0111] Specifically, it means that when the first web 123 undergoes shear plastic deformation and the steel strength is strengthened and the shear bearing capacity reaches μ times the full plastic shear bearing capacity, the first upper flange plate 121 and the first lower flange plate 122 reach the full plastic bending bearing capacity. It means that when the first upper flange plate 121 and the first lower flange plate 122 undergo plastic deformation and the steel strength is strengthened and the bending bearing capacity reaches μ times the full plastic bending bearing capacity, the first web 123 reaches the full plastic shear bearing capacity.

[0112] The detachable energy-absorbing beam of the embodiment of the present invention, the energy-absorbing beam section 12 satisfies M s ≡μ·V S When the first web 123 of the energy-absorbing beam section 12 undergoes shear yield plastic deformation under the action of earthquake, the first upper flange plate 121 and the first lower flange plate 122 undergo plastic deformation later, and the energy-absorbing beam section 12 satisfies V S ≡μ·M s When an earthquake occurs, the first upper flange plate 121 and the first lower flange plate 122 of the energy absorbing beam section 12 undergo plastic deformation first, and the first web plate 123 undergoes shear yield deformation later, so that the first web plate 123, the first upper flange plate 121 and the first lower flange plate 122 of the energy absorbing beam section 12 can all undergo plastic deformation under the action of an earthquake, and it can be avoided that the first web plate 123, the first upper flange plate 121 and the first lower flange plate 122 undergo plastic deformation at the same time when an earthquake occurs, so that the energy absorption capacity of the detachable energy absorbing beam section of the embodiment of the present invention can be fully exerted, the structural stiffness of the energy absorbing beam section 12 can be avoided from decreasing too quickly, the energy absorbing beam section 12 can be avoided from deforming too quickly, and the impact of earthquake disasters can be reduced.

[0113] In some embodiments, the energy dissipation beam section 12 satisfies: M ≥ V S l2 / 2, or V S ≥2·M s / l2,

[0114] Among them, M s is the full plastic bending bearing capacity of the energy dissipation beam segment 12;

[0115] V S is the full plastic shear bearing capacity of the energy dissipation beam segment 12;

[0116] M is the design value of the bending moment resistance of the energy-absorbing beam segment 12;

[0117] V is the design value of shear resistance of energy-absorbing beam segment 12;

[0118] l2 is the dimension of the energy absorbing beam section 12 in the first direction.

[0119] Specifically, the energy dissipation beam section 12 satisfies M≥V S l2 / 2, under the action of earthquake, the first web 123 of the energy absorbing beam section 12 first undergoes shear yield plastic deformation, and the first upper flange plate 121 and the first lower flange plate 122 of the energy absorbing beam section 12 undergo plastic deformation later; the energy absorbing beam section 12 satisfies V S ≥2·M s / l2, the first upper flange plate 121 and the first lower flange plate 122 of the energy absorbing beam section 12 undergo plastic deformation first, and the first web plate 123 of the energy absorbing beam section 12 undergoes shear yield plastic deformation later, so that the first web plate 123, the first upper flange plate 121 and the first lower flange plate 122 of the energy absorbing beam section 12 can all undergo plastic deformation under the action of an earthquake, thereby making it possible to give full play to the energy absorption capacity of the detachable energy absorbing beam section of the embodiment of the present invention.

[0120] In some embodiments, the energy dissipation beam section 12 satisfies: R1≥max(S l1 ,S l2 ,......S li ......,S ln ) and R l / γ RE ≥η·max(S lE1 ,S lE2 ,......S lEi ......,S lEn ),in,

[0121] R l is the design value of resistance of energy absorbing beam segment 12;

[0122] S li is the design value of the basic combined effect of loads on the energy-absorbing beam section 12 under non-seismic conditions;

[0123] S lEi is the design value of the basic combined effect of loads on the energy-absorbing beam section 12 under earthquake conditions;

[0124] γ RE is the seismic adjustment factor of bearing capacity;

[0125] η is a constant magnification factor, which is greater than 1.0. Specifically, the value of η is related to the seismic resistance level of the structure, and the current Code for Seismic Design of Buildings (GB 50011) can be used for details. For example: when the seismic resistance level is level 1, ≥1.3; when the seismic resistance level is level 2, ≥1.2; when the seismic resistance level is level 3, ≥1.1.

[0126] Specifically, the energy dissipation beam section 12 is designed to satisfy R1≥max(S l1 ,S l2 ,......S li ......,S ln ) and R l / γ RE ≥η·max(S lE1 ,S lE2 ,......S lEi ......,S lEn) to make the structure of the energy absorbing beam section 12 more solid and the energy absorbing capacity of the energy absorbing beam section 12 better during earthquake action.

[0127] In some embodiments, the first upper flange plate 121 and the first lower flange plate 122 have the same size in the second direction, the second direction is orthogonal to the first direction and the up-down direction, and the size of the first upper flange plate 121 and the first lower flange plate 122 in the second direction satisfies: b2 = [(0.29·μ·l2-0.25·h2)·h2·t w2 ] / [t f2 (h2+t f2 )];in,

[0128] b2 is the dimension of the first upper flange plate 121 or the first lower flange plate 122 in the second direction;

[0129] t f2 is the size of the first upper flange plate 121 or the first lower flange plate 122 in the up-down direction;

[0130] t w2 is the dimension of the first web 123 in the second direction;

[0131] h2 is the dimension of the first web 123 in the up-down direction;

[0132] l2 is the size of the energy dissipation beam section 12 in the first direction;

[0133] μ is a constant coefficient, and its value range is 1.1≤μ≤1.25.

[0134] Specifically, Figure 5 As shown, the first upper flange plate 121 and the first lower flange plate 122 have the same size in the second direction, and both the first upper flange plate 121 and the first lower flange plate 122 satisfy the formula b2=[(0.29·μ·l2-0.25·h2)·h2·t w2 ] / [t f2 (h2+t f2 )], when the first web 123 produces shear plastic deformation and the steel strength is strengthened and the shear bearing capacity reaches μ times the full plastic shear bearing capacity, the first upper flange plate 121 and the first lower flange plate 122 reach the full plastic bending bearing capacity, so that the limit degree of plastic deformation of the first upper flange plate 121 and the first lower flange plate 122 is consistent, and the first upper flange plate 121 and the second upper flange plate 111 can be prefabricated uniformly, thereby, the manufacturing process of the energy-absorbing beam section 12 is simple and the cost is low.

[0135] In some embodiments, the first upper flange plate 121, the first lower flange plate 122, and the first web plate 123 satisfy: in,

[0136] b2 is the dimension of the first upper flange plate 121 or the first lower flange plate 122 in the second direction;

[0137] t f2 is the size of the first upper flange plate 121 or the first lower flange plate 122 in the up-down direction;

[0138] t w2 is the dimension of the first web 123 in the second direction;

[0139] h2 is the dimension of the first web 123 in the up-down direction;

[0140] l2 is the size of the energy dissipation beam section 12 in the first direction;

[0141] μ is a constant coefficient, and its value range is 1.1≤μ≤1.25.

[0142] Specifically, Figure 5 As shown, according to the formula The size of the first web 123 in the up and down direction can be calculated, and thus, when the first upper flange plate 121 and the first lower flange plate 122 undergo plastic deformation to strengthen the steel strength and the bending bearing capacity reaches μ times the full plastic bending bearing capacity, the first web 123 reaches the full plastic shear bearing capacity.

[0143] In some embodiments, each of the first transition section 11 and the second transition section 13 includes a second upper flange plate 111, a second lower flange plate 112 and a second web plate 113, the second upper flange plate 111 and the second lower flange plate 112 are arranged opposite to each other, and the second upper flange plate 111 and the second lower flange plate 112 both extend along the first direction, the second web plate 113 connects the bottom surface of the second upper flange plate 111 and the top surface of the second lower flange plate 112, and the second web plate 113 extends along the first direction.

[0144] Specifically, the first transition section 11 is taken as an example for description. The second upper flange plate 111 and The size of the second lower flange plate 112 in the second direction gradually decreases in the direction toward the energy absorbing beam section 12, so that the size of the right end of the second upper flange plate 111 in the second direction is the same as the size of the left end of the first upper flange plate 121 in the second direction, and the size of the right end of the second lower flange plate 112 in the second direction is the same as the size of the left end of the first lower flange plate 122 in the second direction.

[0145] Specifically, Figure 1 and Figure 4As shown, the upper side edge of the second web 113 is connected to the bottom surface of the second upper flange plate 111, and the intersection line of the second web 113 and the second upper flange plate 111 is located on the central axis of the second upper flange plate 111 along the first direction, the lower side edge of the second web 113 is connected to the top surface of the second lower flange plate 112, and the intersection line of the second web 113 and the second lower flange plate 112 is located on the central axis of the second lower flange plate 112 along the first direction, and the plane where the second web 113 is located is perpendicular to the plane where the second upper flange plate 111 and the second upper flange plate 111 are located, thereby, the structure of the first transition section 11 and the second transition section 13 are simple, easy to manufacture, and low cost.

[0146] Specifically, the size of the second web 113 in the second direction may be the same as the size of the first web 123 in the second direction. When the size of the second web 113 in the second direction is the same as the size of the first web 123 in the second direction, the plane where the second web 113 is located may be located on the same plane as the plane where the first web 123 is located, so that the second web 113 and the first web 123 are more firmly connected when they are detachably connected.

[0147] In some embodiments, the first transition section 11 and the second transition section 13 satisfy:

[0148] R g ≥max(S g1 ,S g2 ,......S gi ......,S gn );

[0149] R g / γ RE ≥η·max(α1·S gE1 ,α2·S gE2 ,......α i ·S gEi ......,α n ·S gEn );

[0150] in,

[0151] R g is the design resistance value of the first transition section 11 or the second transition section 13;

[0152] S gi is the design value of the basic combined effect of the loads of the first transition section 11 or the second transition section 13 in non-seismic conditions;

[0153] S gEi is the design value of the basic combined effect of the loads of the first transition section 11 or the second transition section 13 under earthquake conditions;

[0154] M s is the full plastic bending bearing capacity of the energy dissipation beam segment 12;

[0155] V s is the full plastic shear bearing capacity of the energy dissipation beam segment 12;

[0156] M slEi is the design value of the basic combined effect bending moment of the energy dissipation beam section 12 under earthquake conditions;

[0157] V slEi is the design value of shear force of the basic combined effect of loads on the energy-absorbing beam section 12 under earthquake conditions;

[0158] γ RE It is the seismic adjustment coefficient of bearing capacity.

[0159] η is a constant magnification factor, which is greater than 1.0. Specifically, the value of η is related to the seismic resistance level of the structure, and the current Code for Seismic Design of Buildings (GB 50011) can be used for details. For example: when the seismic resistance level is level 1, ≥1.3; when the seismic resistance level is level 2, ≥1.2; when the seismic resistance level is level 3, ≥1.1.

[0160] Specifically, the first transition section and the second transition section are designed to meet the following requirements:

[0161] R g ≥max(S g1 ,S g2 ,......S gi ......,S gn );

[0162] R g / γ RE ≥η·max(α1·S gE1 ,α2·S gE2 ,......α i ·S gEi ......,α n ·S gEn );

[0163] Therefore, the first transition section 11 and the second transition section 13 are simple in design and stable in structure.

[0164] In some embodiments, the detachable energy-absorbing beam 1 further includes a first connecting member 14 and a second connecting member 15. The first connecting member 14 is disposed between the first transition section 11 and the energy-absorbing beam section 12, and is used to detachably connect the first transition section 11 and the energy-absorbing beam section 12. The second connecting member 15 is disposed between the second transition section 13 and the energy-absorbing beam section 12, and is used to detachably connect the second transition section 13 and the energy-absorbing beam section 12.

[0165] Specifically, Figure 1 , 2 As shown in Figure 6, the first connecting member 14 is provided between the right end of the first transition section 11 and the left end of the energy absorbing beam section 12, and is used to detachably connect the first transition section 11 and the energy absorbing beam section 12. The second connecting member 15 is provided between the right end of the energy absorbing beam section 12 and the left end of the second transition section 13, and is used to detachably connect the second transition section 13 and the energy absorbing beam section 12. Therefore, when the energy absorbing beam section 12 undergoes plastic deformation and consumes energy, the staff can disassemble and replace the energy absorbing beam section 12, so that the detachable energy absorbing beam section of the embodiment of the present invention is easy to repair.

[0166] In some embodiments, the first connecting member 14 includes a first connecting plate 151, a second connecting plate 152, a third connecting plate 153 and a fastener 154. The first connecting plate 151 is arranged on the top surface of the first upper flange plate 121 and the second upper flange plate 111; the second connecting plate 152 and the first connecting plate 151 are arranged opposite to each other, and the second connecting plate 152 is arranged on the bottom surface of the first lower flange plate 122 and the second lower flange plate 112. The third connecting plate 153 is arranged between the first connecting plate 151 and the second connecting plate 152, and the third connecting plate 153 is closely attached to the first web plate 123 and the second web plate 113. The fastener 154 is used to connect the first connecting plate 151 and the first upper flange plate 121 and the second upper flange plate 111, the second connecting plate 152 and the first lower flange plate 122 and the second lower flange plate 112, and the third connecting plate 153 and the first web plate 123 and the second web plate 113.

[0167] Specifically, the first connecting member 14 connects the first transition section 11 and the energy dissipation beam section 12 in the same manner as the second connecting member 15 connects the second transition section 13 and the energy dissipation beam section 12. The following is an example of the first connecting member 14 connecting the first transition section 11 and the energy dissipation beam section 12. Figure 1 , Figure 4 and Figure 6 As shown, the left end of the first connecting plate 151 contacts the top surface of the second upper flange plate 111, the right end of the first connecting plate 151 contacts the top surface of the first upper flange plate 121, and the first connecting plate 151 is respectively connected to the second upper flange plate 111 and the first upper flange plate 121 through fasteners 154 to connect the first upper flange plate 121 and the second upper flange plate 111.

[0168] The left end of the second connecting plate 152 contacts the bottom surface of the second lower flange plate 112, and the right end of the second connecting plate 152 contacts the bottom surface of the first lower flange plate 122. The second connecting plate 152 is respectively connected to the second lower flange plate 112 and the first lower flange plate 122 through fasteners 154 to connect the first lower flange plate 122 and the second lower flange plate 112.

[0169] The left end of the third connecting plate 153 is connected to the second web 113 through the fastener 154, and the right end of the third connecting member is connected to the first web 123 through the fastener 154, so that the first web 123 is connected to the second web 113. Therefore, the detachable connection between the energy absorbing beam section 12 and the first transition section 11 and the second transition section 13 is simple, and the staff can easily operate when disassembling and replacing the energy absorbing beam section 12. In addition, the structure of the first connecting member 14 is simple, which saves costs.

[0170] In some embodiments, the design value of the connection bending moment resistance of the fastener 154 is higher than the full plastic bending bearing capacity of the energy absorbing beam section 12 , and the design value of the shear resistance of the fastener 154 is higher than the full plastic shear bearing capacity of the energy absorbing beam section 12 .

[0171] Specifically, when an earthquake occurs, the design value of the connection resistance of the fastener 154 is higher than the full plastic bending bearing capacity and the full plastic shear bearing capacity of the energy absorbing beam section 12, so that the node connected by the fastener 154 will not be damaged after the first upper flange plate 121 and the first lower flange plate 122 undergo bending yield plastic deformation or the first web plate 123 undergoes shear yield plastic deformation. Therefore, the installation structure of the detachable energy absorbing beam section in the embodiment of the present invention is stable.

[0172] In some embodiments, fastener 154 satisfies: in, The design values ​​of the bending moment and shear resistance of the fastener 154 at the connection between the energy absorbing beam section 12 and the first transition section 11 or the second transition section 13;

[0173] R bolt,i is the bearing capacity of any fastener 154 at the connection node where the energy absorbing beam section 12 is connected to the first transition section 11 or the second transition section 13 by fasteners;

[0174] The connection node where the energy absorbing beam section 12 is connected to the first transition section 11 or the second transition section 13 by the fastener 154, the full plastic bending bearing capacity of the energy absorbing beam section 12 is used to replace the load combination effect bending moment design value at the node, and the load effect force of any fastener 154;

[0175] The connection node where the energy absorbing beam section 12 is connected to the first transition section 11 or the second transition section 13 by the fastener 154, the full plastic shear bearing capacity of the energy absorbing beam section 12 is used to replace the load combination effect bending moment design value at the node, and the load effect force of any fastener 154;

[0176] M s 、V s are the full plastic bending bearing capacity and the full plastic shear bearing capacity of the energy dissipation beam segment 12;

[0177] η is a constant magnification factor, which is greater than 1.0.

[0178] Specifically, the fastener 154 is designed to meet Therefore, the fastener 154 is simple in design and stable in structure, meeting the requirements for detachable connection between the energy-absorbing beam section 12 and the first transition section 11 and the second transition section 13 .

[0179] In some embodiments, the fasteners 154 are configured as high-strength bolts, which can withstand a relatively large load, thereby ensuring the stability of the connection between the energy-absorbing beam section 12 and the first transition section 11 and the second transition section 13 .

[0180] In some embodiments, the disassembly type energy-absorbing beam further includes a stiffening plate 16, at least two of which are provided, and at least two of which are respectively provided on both sides of the first web 123 in the second direction, the upper end of the stiffening plate 16 is connected to the bottom surface of the first upper flange plate 121, the lower end of the stiffening plate 16 is connected to the top surface of the first lower flange plate 122, the side of the stiffening plate 16 is connected to the side surface of the first web 123, and at least two stiffening plates 16 are divided into multiple groups, each group of stiffening plates 16 includes two stiffening plates 16 arranged at intervals along the second direction, and multiple groups of stiffening plates 16 are arranged at intervals along the first direction.

[0181] Specifically, Figure 1-6 As shown, at least two stiffening plates 16 are divided into multiple groups, and the multiple groups of stiffening plates 16 are arranged at intervals along the extension direction of the energy-absorbing beam section 12. Each group of stiffening plates 16 includes two stiffening plates, and the two stiffening plates 16 are respectively arranged on both sides of the first web 123 in the second direction. Therefore, the stiffening plates 16 strengthen the rigidity of the energy-absorbing beam section 12 to make the structure of the energy-absorbing beam section 12 more solid.

[0182] The eccentric support structure according to the embodiment of the present invention comprises a first non-energy absorbing beam section 2, a second non-energy absorbing beam section 3 and a detachable energy absorbing beam 1 according to the embodiment of the present invention, wherein the first non-energy absorbing beam section 2 and the second non-energy absorbing beam section 3 extend along a first direction, and one end of the first non-energy absorbing beam section 2 (such as Figure 1 The right end of the first non-energy absorbing beam shown in FIG. 1 ) and the end of the first transition section 11 away from the energy absorbing beam section 12 (as shown in FIG. Figure 1 The left end of the first transition section 11 is connected to one end of the second non-energy absorbing beam section 3 (such as Figure 1 The left end of the first non-energy absorbing beam shown in FIG. 1 ) and the end of the second transition section 13 away from the energy absorbing beam section 12 (as shown in FIG. Figure 1 The right end of the second transition section 13 is connected.

[0183] The eccentric support member of the embodiment of the present invention can fully exert the energy absorption capacity of the detachable energy absorption beam section 1, and can also prevent the structural stiffness of the energy absorption beam section 12 from decreasing too quickly, thereby reducing the impact of earthquake disasters. In addition, the staff can also dismantle and replace the energy absorption beam section 12 that has undergone plastic deformation and consumed energy, so that the eccentric support member of the embodiment of the present invention is easy to repair.

[0184] Specifically, Figure 1 and Figure 3 As shown, each of the first non-energy absorbing beam section 2 and the second non-energy absorbing beam section 3 includes a third upper flange plate 21, a third lower flange plate 22 and a third web plate 23. The third upper flange plate 21 and the third lower flange plate 22 are arranged opposite to each other, and the third web plate 23 connects the bottom surface of the third upper flange plate 21 and the top surface of the third lower flange plate 22. The dimensions of the third upper flange plate 21 and the third lower flange plate 22 in the up-down direction may be the same as the dimensions of the first upper flange plate 121 and the first lower flange plate 122 in the up-down direction.

[0185] The size of the third upper flange panel 21 in the second direction is equal to the size of the third lower flange panel 22 in the second direction, and the sizes of the third upper flange panel 21 and the third lower flange panel 22 in the second direction are greater than the sizes of the first upper flange panel 121 and the first lower flange panel 122 in the second direction.

[0186] The dimensions of the third web 23, the second web 113 and the first web 123 in the second direction may be the same. When the dimensions of the third web 23 and the second web 113 in the second direction are the same, the plane where the second web 113 is located may be on the same plane as the plane where the third web 23 is located, so that the second web 113 and the third web 23 are more firmly connected.

[0187] The first non-energy absorbing beam segment 2 and the second non-energy absorbing beam segment 3 satisfy:

[0188] R b ≥max(S b1 ,S b2 ,......S bi ......,S bn );

[0189] R b / γ RE ≥η·max(α1·S bE1 ,α2·S bE2 ,......α i ·S bEi ......,α n ·S bEn );

[0190] in,

[0191] R b is the design value of the resistance of the first non-energy absorbing beam segment 2 or the second non-energy absorbing beam segment 3;

[0192] S bi is the design value of the basic combined effect of the loads of the first non-energy absorbing beam section 2 or the second non-energy absorbing beam section 3 under non-seismic conditions;

[0193] S bEi is the design value of the basic combined effect of the loads of the first non-energy absorbing beam section 2 or the second non-energy absorbing beam section 3 under earthquake conditions;

[0194] M s is the full plastic bending bearing capacity of the energy dissipation beam segment 12;

[0195] V s is the full plastic shear bearing capacity of the energy dissipation beam segment 12;

[0196] M slEi is the design value of the basic combined effect bending moment of the energy dissipation beam section 12 under earthquake conditions;

[0197] V slEi is the design value of shear force of the basic combined effect of loads on the energy-absorbing beam section 12 under earthquake conditions;

[0198] γ RE It is the seismic adjustment coefficient of bearing capacity.

[0199] η is a constant magnification factor, which is greater than 1.0. Specifically, the value of η is related to the seismic resistance level of the structure, and the current Code for Seismic Design of Buildings (GB 50011) can be used for details. For example: when the seismic resistance level is level 1, ≥1.3; when the seismic resistance level is level 2, ≥1.2; when the seismic resistance level is level 3, ≥1.1.

[0200] In some embodiments, the eccentric support member further includes a first support segment 4 and a second support segment 5, one end of the first support segment 4 (eg Figure 1 The upper end of the first support section 4 shown in the figure) and the end of the first non-energy-absorbing beam section 2 close to the detachable energy-absorbing beam 1 (as shown in the figure) Figure 1 The bottom surface of the first non-energy absorbing beam section 2 is connected to the right end of the first supporting section 4. Figure 1 The lower end of the first support section 4 shown in FIG. 1 extends downward and is inclined in a direction away from the detachable energy-absorbing beam 1. One end of the second support section 5 (as shown in FIG. 1 ) extends downward and is inclined in a direction away from the detachable energy-absorbing beam 1. Figure 1 The upper end of the second support section 5 shown in the figure) and the end of the second non-energy-absorbing beam section 3 close to the detachable energy-absorbing beam 1 (as shown in the figure) Figure 1 The bottom surface of the second non-energy absorbing beam section 3 is connected to the left end of the second supporting section 5. Figure 1The lower end of the second supporting section 5 is shown to be inclined in a downward direction and away from the detachable energy absorbing beam 1 .

[0201] Specifically, Figure 1 and Figure 2 As shown, two groups of stiffening plates 16 are provided at the right end of the third web 23 of the first non-energy absorbing beam section 2, and the two groups of stiffening plates 16 are arranged at intervals along the first direction. The two stiffening plates 16 in each group of stiffening plates 16 are arranged on both sides of the third web 23 along the second direction. The left end of the third web 23 of the first non-energy absorbing beam section 2 is also provided with a stiffening plate 16 to strengthen the stiffness of the connection between the first supporting section 4 and the first non-energy absorbing beam section 2 and the connection between the second supporting section 5 and the first non-energy absorbing beam section 2.

[0202] Furthermore, the right end of the third web 23 of the first non-energy absorbing beam section 2 is integrally formed with the left end of the second web 113 of the first transition section 11, and the left end of the third web 23 of the second non-energy absorbing beam section 3 is integrally formed with the right end of the second web 113 of the second transition section 13, thereby making the structure of the eccentric support member of the embodiment of the present invention more stable.

[0203] The first support segment 4 and the second support segment 5 meet the following requirements:

[0204] R c ≥max(S c1 ,S c2 ,......S ci ......,S cn );

[0205] R c / γ RE ≥η·max(α1·S cE1 ,α2·S cE2 ,......α i ·S cEi ......,α n ·S cEn );

[0206] in,

[0207] R c is the design value of the resistance of the first supporting section 4 or the second supporting section 5;

[0208] S ci is the design value of the basic combined effect of the loads of the first support section 4 or the second support section 5 in non-seismic conditions;

[0209] S cEi is the design value of the basic combined effect of the loads of the first supporting section 4 or the second supporting section 5 under earthquake conditions;

[0210] Ms is the full plastic bending bearing capacity of the energy dissipation beam segment 12;

[0211] V s is the full plastic shear bearing capacity of the energy dissipation beam segment 12;

[0212] M slEi is the design value of the basic combined effect bending moment of the energy dissipation beam section 12 under earthquake conditions;

[0213] V slEi is the design value of shear force of the basic combined effect of loads on the energy-absorbing beam section 12 under earthquake conditions;

[0214] γ RE It is the seismic adjustment coefficient of bearing capacity.

[0215] η is a constant magnification factor, which is greater than 1.0. Specifically, the value of η is related to the seismic resistance level of the structure, and the current Code for Seismic Design of Buildings (GB 50011) can be used for details. For example: when the seismic resistance level is level 1, ≥1.3; when the seismic resistance level is level 2, ≥1.2; when the seismic resistance level is level 3, ≥1.1.

[0216] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0217] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0218] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0219] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0220] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0221] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A detachable energy-absorbing beam, characterized in that: The invention comprises a first transition section (11), an energy absorbing beam section (12) and a second transition section (13) which are detachably connected in sequence along a first direction, the energy absorbing beam section (12) comprising a first upper flange plate (121), a first lower flange plate (122) and a first web plate (123), the first upper flange plate (121) and the first lower flange plate (122) being arranged opposite to each other in the up-down direction, and the first upper flange plate (121) and the first lower flange plate (122) both extending along the first direction, the first web plate (123) connecting the bottom surface of the first upper flange plate (121) and the top surface of the first lower flange plate (122), and the first web plate (123) extending along the first direction; The energy absorbing beam section (12) satisfies: M s ≡μ·V S , or V S ≡μ·M s , Among them, M s is the full plastic bending bearing capacity of the energy dissipation beam section (12); V S is the full plastic shear bearing capacity of the energy dissipation beam section (12); μ is a constant coefficient, and its value range is 1.1≤μ≤1.25, and it can take any value within the range; ≡ means equivalent to; The invention also comprises a first connecting member (14) and a second connecting member (15), wherein the first connecting member (14) is arranged between the first transition section (11) and the energy absorbing beam section (12) and is used for detachably connecting the first transition section (11) and the energy absorbing beam section (12), and the second connecting member (15) is arranged between the second transition section (13) and the energy absorbing beam section (12) and is used for detachably connecting the second transition section (13) and the energy absorbing beam section (12); Each of the first transition section (11) and the second transition section (13) comprises a second upper flange plate (111), a second lower flange plate (112) and a second web plate (113); the second upper flange plate (111) and the second lower flange plate (112) are arranged opposite to each other, and the second upper flange plate (111) and the second lower flange plate (112) both extend along the first direction; the second web plate (113) connects the bottom surface of the second upper flange plate (111) and the top surface of the second lower flange plate (112), and the second web plate (113) extends along the first direction; The first connecting member (14) comprises a first connecting plate (151), a second connecting plate (152), a third connecting plate (153) and a fastener (154), wherein the first connecting plate (151) is arranged on the top surface of the first upper flange plate (121) and the second upper flange plate (111); the second connecting plate (152) and the first connecting plate (151) are arranged opposite to each other, and the second connecting plate (152) is arranged on the bottom surface of the first lower flange plate (122) and the second lower flange plate (112); the third connecting plate (153) is arranged on the The first connecting plate (151) and the second connecting plate (152) are connected to each other, and the third connecting plate (153) is in close contact with the first web (123) and the second web (113); the fastener (154) is used to connect the first connecting plate (151) and the first upper flange plate (121) and the second upper flange plate (111), the second connecting plate (152) and the first lower flange plate (122) and the second lower flange plate (112), and the third connecting plate (153) and the first web (123) and the second web (113); The design value of the connection bending moment resistance of the fastener (154) is higher than the full plastic bending bearing capacity of the energy absorbing beam section (12), the design value of the shear resistance of the fastener (154) is higher than the full plastic shear bearing capacity of the energy absorbing beam section (12), and the fastener (154) satisfies: in, The design values ​​of the connection bending moment and shear resistance of the fastener (154) at the connection between the energy absorbing beam section (12) and the first transition section (11) or the second transition section (13); R bolt,i is the connection node where the energy absorbing beam section (12) is connected to the first transition section (11) or the second transition section (13) via the fastener (154), and the bearing capacity of any of the fasteners (154); For a connection node where the energy absorbing beam section (12) is connected to the first transition section (11) or the second transition section (13) via the fastener (154), the full plastic bending bearing capacity of the energy absorbing beam section (12) is used to replace the load combination effect bending moment design value at the node, and the load effect force of any of the fasteners (154); For a connection node where the energy absorbing beam section (12) is connected to the first transition section (11) or the second transition section (13) via the fastener (154), the full plastic shear bearing capacity of the energy absorbing beam section (12) is used to replace the load combination effect bending moment design value at the node, and the load effect force of any of the fasteners (154); M s 、V s are the full plastic bending bearing capacity and the full plastic shear bearing capacity of the energy dissipation beam section (12); η is a constant magnification factor, which is greater than 1.

0.

2. The detachable energy-absorbing beam according to claim 1, characterized in that: The energy dissipation beam section (12) satisfies: M ≥ V S l2 / 2, or V S ≥2·M s / l2, Among them, M s is the full plastic bending bearing capacity of the energy dissipation beam section (12); V S is the full plastic shear bearing capacity of the energy dissipation beam section (12); M is the design value of the bending moment resistance of the energy absorbing beam section (12); V is the design value of the shear resistance of the energy-absorbing beam section (12); l2 is the dimension of the energy absorbing beam section (12) in the first direction.

3. The detachable energy-absorbing beam according to claim 2, characterized in that: The energy dissipation beam section (12) satisfies: R1≥max(S l1 ,S l2 ,......S li ......,S ln ),as well as R l / γ RE ≥η·max(S lE1 ,S lE2 ,......S lEi ......,S lEn ); in, R l is the design value of the resistance of the energy absorbing beam section (12); S li is the design value of the basic combined effect of the load of the energy-absorbing beam section (12) in non-seismic conditions; S lEi is the design value of the basic combined effect of the load of the energy-absorbing beam section (12) under earthquake conditions; γ RE is the seismic adjustment factor of bearing capacity; η is a constant magnification factor, which is greater than 1.

0.

4. The detachable energy-absorbing beam according to claim 1, characterized in that: The first upper flange plate (121) and the first lower flange plate (122) have the same dimensions in the second direction, the second direction is orthogonal to the first direction and the up-down direction, and the dimensions of the first upper flange plate (121) and the first lower flange plate (122) in the second direction satisfy: b2=[(0.29·μ·l2-0.25·h2)·h2·t w2 ] / [t f2 (h2+t f2 )];in, b2 is the dimension of the first upper flange plate (121) or the first lower flange plate (122) in the second direction; t f2 is the size of the first upper flange plate (121) or the first lower flange plate (122) in the up-down direction; t w2 is the dimension of the first web (123) in the second direction; h2 is the dimension of the first web (123) in the up-down direction; l2 is the size of the energy absorbing beam section (12) in the first direction; μ is a constant coefficient, and its value range is 1.1≤μ≤1.

25.

5. The detachable energy-absorbing beam according to claim 4, characterized in that: The first upper flange plate (121), the first lower flange plate (122) and the first web plate (123) satisfy: in, b2 is the dimension of the first upper flange plate (121) or the first lower flange plate (122) in the second direction; t f2 is the size of the first upper flange plate (121) or the first lower flange plate (122) in the up-down direction; t w2 is the dimension of the first web (123) in the second direction; h2 is the dimension of the first web (123) in the up-down direction; l2 is the size of the energy absorbing beam section (12) in the first direction; μ is a constant coefficient, and its value range is 1.1≤μ≤1.

25.

6. The detachable energy-absorbing beam according to claim 5, characterized in that: The first transition section (11) and the second transition section (13) satisfy: R g ≥max(S g1 ,S g2 ,......S gi ......,S gn ); R g / c RE ≥η·max(α1·S gE1 ,α2·S gE2 ,......a i ·S gEi ......,a n ·S gEn ); in, R g is the resistance design value of the first transition section (11) or the second transition section (13); S gi is the design value of the basic combined effect of the loads of the first transition section (11) or the second transition section (13) in non-seismic conditions; S gEi is the design value of the basic combined effect of the load of the first transition section (11) or the second transition section (13) under earthquake conditions; M s is the full plastic bending bearing capacity of the energy dissipation beam section (12); V s is the full plastic shear bearing capacity of the energy dissipation beam section (12); M slEi is the design value of the basic combined load effect bending moment of the energy-absorbing beam section (12) under earthquake conditions; V slEi is the design value of shear force of the basic combined effect of loads of the energy-absorbing beam section (12) under earthquake conditions; γ RE is the seismic adjustment coefficient of the bearing capacity; η is a constant magnification factor, which is greater than 1.

0.

7. The detachable energy-absorbing beam according to any one of claims 4 to 6, characterized in that: It also includes a stiffening plate (16), at least two of which are provided, and at least two of the stiffening plates (16) are respectively provided on both sides of the first web (123) in the second direction, the upper end of the stiffening plate (16) is connected to the bottom surface of the first upper flange plate (121), the lower end of the stiffening plate (16) is connected to the top surface of the first lower flange plate (122), and the side edge of the stiffening plate (16) is connected to the side surface of the first web (123), and the at least two stiffening plates (16) are divided into a plurality of groups, each group of the stiffening plates (16) includes two stiffening plates (16) arranged at intervals along the second direction, and the plurality of groups of the stiffening plates (16) are arranged at intervals along the first direction.

8. An eccentric support member, characterized in that: The invention comprises a first non-energy absorbing beam section (2), a second non-energy absorbing beam section (3) and a detachable energy absorbing beam (1), wherein the detachable energy absorbing beam (1) is the detachable energy absorbing beam (1) according to any one of claims 1 to 7, wherein the first non-energy absorbing beam section (2) and the second non-energy absorbing beam section (3) extend along the first direction, one end of the first non-energy absorbing beam section (2) is connected to one end of the first transition section (11) away from the energy absorbing beam section (12), and one end of the second non-energy absorbing beam section (3) is connected to one end of the second transition section (13) away from the energy absorbing beam section (12).

9. The eccentric support member according to claim 8, characterized in that: The first non-energy absorbing beam section (2) and the second non-energy absorbing beam section (3) satisfy: R b ≥max(S b1 ,S b2 ,......S bi ......,S bn ); R b / c RE ≥η·max(α1·S bE1 ,α2·S bE2 ,......a i ·S bEi ......,a n ·S bEn ); in, R b is the design resistance value of the first non-energy absorbing beam section (2) or the second non-energy absorbing beam section (3); S bi is the design value of the basic combined effect of the load of the first non-energy absorbing beam section (2) or the second non-energy absorbing beam section (3) in a non-seismic working condition; S bEi is the design value of the basic combined effect of the load of the first non-energy absorbing beam section (2) or the second non-energy absorbing beam section (3) under earthquake conditions; M s is the full plastic bending bearing capacity of the energy dissipation beam section (12); V s is the full plastic shear bearing capacity of the energy dissipation beam section (12); M slEi is the design value of the basic combined load effect bending moment of the energy-absorbing beam section (12) under earthquake conditions; V slEi is the design value of shear force of the basic combined effect of loads of the energy-absorbing beam section (12) under earthquake conditions; γ RE is the seismic adjustment coefficient of the bearing capacity; η is a constant magnification factor, which is greater than 1.

0.

10. The eccentric support member according to claim 8, characterized in that The invention also comprises a first supporting section (4) and a second supporting section (5), wherein one end of the first supporting section (4) is connected to the bottom surface of the first non-energy absorbing beam section (2) close to the end of the detachable energy absorbing beam (1), and the other end of the first supporting section (4) extends in a downward direction and is inclined in a direction away from the detachable energy absorbing beam (1); and one end of the second supporting section (5) is connected to the bottom surface of the second non-energy absorbing beam section (3) close to the end of the detachable energy absorbing beam (1), and the other end of the second supporting section (5) is inclined in a downward direction and in a direction away from the detachable energy absorbing beam (1).

11. The eccentric support member according to claim 10, characterized in that The first supporting section (4) and the second supporting section (5) satisfy: R c ≥max(S c1 ,S c2 ,......S ci ......,S cn ); R c / c RE ≥η·max(α1·S cE1 ,α2·S cE2 ,......a i ·S cEi ......,a n ·S cEn ); in, R c is the design resistance value of the first supporting section (4) or the second supporting section (5); S ci is the design value of the basic combined effect of the loads of the first supporting section (4) or the second supporting section (5) in a non-seismic working condition; S cEi is the design value of the basic combined effect of the loads of the first supporting section (4) or the second supporting section (5) under earthquake conditions; M s is the full plastic bending bearing capacity of the energy dissipation beam section (12); V s is the full plastic shear bearing capacity of the energy dissipation beam section (12); M slEi is the design value of the basic combined load effect bending moment of the energy-absorbing beam section (12) under earthquake conditions; V slEi is the design value of shear force of the basic combined effect of loads of the energy-absorbing beam section (12) under earthquake conditions; γ RE is the seismic adjustment coefficient of the bearing capacity; η is a constant magnification factor, which is greater than 1.0.

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