Energy dissipation type connecting beam

Abstract

The present invention relates to an energy-absorbing type coupling beam, comprising two end plates detachably connected to a non-energy-absorbing section and an energy-absorbing device connected to the end plates, the energy-absorbing device comprising a mild steel component and a damper, the mild steel component comprising a first mild steel part and a second mild steel part, one end of the first mild steel part being connected to an end plate, one end of the second mild steel part being connected to another end plate, the damper being connected between the first mild steel part and the second mild steel part, the damper being a composite of an eddy current damper and a viscoelastic damper. Compared with the prior art, the structural comfort is improved and full-stage energy absorption is achieved.

Description

Technical Field

[0001] The invention relates to the field of earthquake resistance and disaster prevention and reduction of civil engineering structures, and in particular to an energy-absorbing coupling beam. Background Art

[0002] With the rapid development of my country's social economy, high-rise buildings are becoming more and more common. Shear wall structures, as the main lateral force-resistant structural form of high-rise buildings, are prone to stress condensation in earthquakes, and the wall members yield and brittle failure will cause huge disasters and losses. For this reason, the specification proposes the ductile design of shear wall structures, requiring the coupling beam to be the first line of defense of the seismic system of the shear wall joint, and to enter the yield cycle plastic deformation first when encountering earthquakes, dissipating the earthquake input energy to protect the main structure of the shear wall. However, if the plastic damage of the coupling beam is accumulated and not reinforced or repaired in time, it will inevitably lead to damage to the coupling beam, and the shear wall will be threatened by huge aftershocks. Post-disaster repair is difficult and uneconomical.

[0003] The eddy current damper uses the conductor mass block moving in the magnetic field to cut the magnetic flux lines to generate induced electromotive force, generate eddy currents, and thus cause the resistance thermal effect to consume vibration energy. At the same time, the eddy currents generated generate a new magnetic field in the opposite direction of the original magnetic field, thereby generating a damping force in the opposite direction of the conductor movement and also playing a vibration reduction role. Viscoelastic material is a composite damping material made of a polymer matrix with additives and fillers. A typical viscoelastic damper is made of two layers of viscoelastic material vulcanized and bonded between three steel plates. During the deformation process, the two constrained steel plates of the damper and the middle steel plate produce relative deformation, resulting in shear deformation and energy consumption of the viscoelastic material layer. Soft steel materials are widely used in energy dissipation dampers in the engineering field because of their clear constitutive relationship, stable performance, and full hysteresis loop. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide an energy-consuming coupling beam with high efficiency in all stages of energy consumption.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An energy-absorbing coupling beam comprises two end plates detachably connected to a non-energy-absorbing section and an energy-absorbing device connected to the end plates, wherein the energy-absorbing device comprises a mild steel component and a damper, wherein the mild steel component comprises a first mild steel component and a second mild steel component, wherein one end of the first mild steel component is connected to one end plate, and one end of the second mild steel component is connected to another end plate, wherein a damper is connected between the first mild steel component and the second mild steel component, and wherein the damper is a composite of an eddy current damper and a viscoelastic damper.

[0007] The first soft steel member and the second soft steel member are I-shaped steels, and the I-shaped surfaces of the I-shaped steels are connected to the end plates.

[0008] The flanges of the first soft steel part and the second soft steel part are flanges with recesses at their edges.

[0009] The webs of the first soft steel member and the second soft steel member are provided with holes.

[0010] The holes are a plurality of rectangular holes arranged in parallel.

[0011] The composite body includes a copper plate layer and a magnet layer, the copper plate layer includes a plurality of copper plates, the magnet layer includes a plurality of magnet embedding plates embedded with magnets, the copper plates and the magnet embedding plates are cross-fixedly connected by viscoelastic material, the copper plates are fixedly connected to the first soft steel part, and the magnet embedding plates are fixedly connected to the second soft steel part.

[0012] All the magnets are embedded in such a way that the magnetic poles are in the same direction.

[0013] The copper plate layer includes an inner copper plate connected to both sides of the web of the first soft steel part and an outer copper plate connected to the inner copper plate. The magnet layer includes an inner magnet embedding plate connected to both sides of the web of the second soft steel part and an outer magnet embedding plate connected to the inner magnet embedding plate. The parts of the inner magnet embedding plate and the outer magnet embedding plate extending out of the web are embedded with magnets. The extending web part of the copper plate layer and the extending web part of the magnet layer are cross-fixed and connected by viscoelastic material. The non-extending web part of the inner copper plate is fixedly connected to the non-extending web part of the outer copper plate by a pad. The non-extending web part of the inner magnet embedding plate is fixedly connected to the non-extending web part of the outer magnet embedding plate by a pad.

[0014] The non-extending web portion of the inner copper plate, the non-extending web portion of the outer copper plate and the pad are connected by bolts, and the non-extending web portion of the inner magnet embedding plate, the non-extending web portion of the outer magnet embedding plate and the pad are connected by bolts.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) Full-stage energy dissipation: The composite structure composed of the viscoelastic damper and the eddy current damper can start to dissipate energy under small earthquakes, while the metal mild steel damper starts to dissipate energy under large earthquakes, which improves the structural comfort and realizes full-stage energy dissipation.

[0017] (2) High shear energy absorption strength: The shear energy absorption advantages of the three dampers are combined to form a replaceable connecting beam with high shear energy absorption strength.

[0018] (3) High efficiency energy dissipation: Within the limited operating space of the traditional coupling beam, the viscoelastic damper and the eddy current damper are combined and then connected in series with the metal damper to dissipate energy in all stages, thus achieving high efficiency energy dissipation of the replaceable coupling beam.

[0019] (4) Replaceable: It is conducive to post-earthquake repair and replacement. The multi-stage combined energy dissipation damper of the present invention is detachably connected to the non-energy dissipation section end plate through the end plate, which is easy to disassemble and replace after the earthquake.

[0020] (5) All magnet poles are embedded in the same direction, which can maximize the reverse force generated by the eddy current damper and thus increase energy consumption.

[0021] (6) The second soft steel part is an I-shaped steel, which has good economy and stable energy consumption capacity.

[0022] (7) The flange has a recessed edge to control the energy dissipation position.

[0023] (8) Holes are provided in the webs of the first soft steel member and the second soft steel member, thereby improving the energy dissipation capacity and the ductility of the member.

[0024] (9) The holes are multiple rectangular holes arranged in parallel, and the construction operation is convenient and simple.

[0025] (10) The eddy current damper and the viscoelastic damper are cross-interlocked to form a composite, which is different from the mechanical arrangement of the two and has the advantage of improving the energy dissipation capacity in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0028] Reference numerals:

[0029] 1 is an end plate; 2 is a first soft steel part; 3 is a high-strength bolt; 41 is an inner copper plate; 42 is an outer copper plate; 51 is an inner magnet embedding plate; 52 is an outer magnet embedding plate; 6 is a pad; 7 is a viscoelastic material; 8 is a magnet; and 9 is a second soft steel part. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] Example

[0032] This embodiment provides a viscoelastic and eddy current combined full-stage high-efficiency energy-dissipating replaceable connecting beam, including two end plates 1 detachably connected to the non-energy-dissipating section and an energy-dissipating device connected to the end plate 1, the energy-dissipating device includes a mild steel component (metal damper) and a damper, the mild steel component includes a first mild steel part 2 and a second mild steel part 9, one end of the first mild steel part 2 is connected to one end plate 1, one end of the second mild steel part 9 is connected to another end plate 1, the damper is connected between the first mild steel part 2 and the second mild steel part 9, and the damper is a composite composed of an eddy current damper and a viscoelastic damper. Combining the shear energy dissipation advantages of the three dampers, a replaceable connecting beam with high shear energy dissipation strength is formed; the eddy current damper and the viscoelastic damper are cross-engaged to form a composite, which is different from the mechanical arrangement of the two, and has the advantage of improving energy dissipation capacity in a limited space.

[0033] The composite body includes a copper plate layer and a magnet layer. The copper plate layer includes multiple copper plates. The magnet layer includes multiple magnet embedding plates embedded with magnets 8. The copper plate and the magnet embedding plates are cross-fixedly connected by viscoelastic material 7. The copper plate is fixedly connected to the first soft steel part 2. The magnet embedding plate is fixedly connected to the second soft steel part 9.

[0034] The copper plate layer includes an inner copper plate 41 connected to both sides of the web of the first soft steel part 2 and an outer copper plate 42 connected to the inner copper plate 41, the magnet layer includes an inner magnet embedding plate 51 connected to both sides of the web of the second soft steel part 9 and an outer magnet embedding plate 52 connected to the inner magnet embedding plate 51, the parts of the inner magnet embedding plate 51 and the outer magnet embedding plate 52 extending out of the web are embedded in the magnet 8, the part of the copper plate layer extending out of the web and the part of the magnet layer extending out of the web are cross-fixed and connected by viscoelastic material 7, the part of the inner copper plate 41 not extending out of the web and the part of the outer copper plate 42 not extending out of the web are fixedly connected by a pad 6, and the part of the inner magnet embedding plate 51 not extending out of the web and the part of the outer magnet embedding plate 52 not extending out of the web are fixedly connected by a pad 6.

[0035] The end plate 1 is connected to the non-energy absorbing section by bolts.

[0036] The first soft steel member 2 and the second soft steel member 9 are I-shaped steels, and the I-shaped surface of the I-shaped steel is connected to the end plate 1. The I-shaped steel has stable mechanical properties and excellent economic efficiency.

[0037] The flanges of the first soft steel member 2 and the second soft steel member 9 are flanges with recesses at the edges, which has the advantage that the energy dissipation position can be controlled.

[0038] Holes are arranged on the webs of the first soft steel member 2 and the second soft steel member 9, and the holes are multiple rectangular holes arranged in parallel, which have the advantages of concentrated energy consumption, strong energy consumption capacity, stable performance after yielding, and convenient construction.

[0039] All the magnets 8 have their poles embedded in the same direction, which can maximize the reverse force generated by the eddy current damper, thereby increasing energy consumption.

[0040] The portion of the inner copper plate 41 that does not extend out of the web, the portion of the outer copper plate 42 that does not extend out of the web, and the pad 6 are connected by high-strength bolts 3, and the portion of the inner magnet embedding plate 51 that does not extend out of the web, the portion of the outer magnet embedding plate 52 that does not extend out of the web, and the pad 6 are connected by high-strength bolts 3.

[0041] The principle of the eddy current damper is that when the copper plate and the magnet 8 produce relative displacement, the copper plate in the magnetic field continuously cuts the magnetic flux lines to form eddy currents, generating a resistive thermal effect; the principle of the viscoelastic material damper is that when the viscoelastic material produces relative shear deformation with the constraint plates on both sides, it produces tensile deformation and energy consumption, and can provide a certain lateral stiffness. The energy consumption of eddy currents and viscoelastic materials is related to the vibration speed. The greater the speed, the greater the energy consumption. Therefore, these two dampers are both velocity dampers, which can play a role when the displacement of the small earthquake structure is very small. When connected in series with the displacement-type metal damper, full-stage energy consumption can be achieved, while ensuring the comfort of the structure under small earthquakes and wind vibrations and the safety of the main structure under large earthquakes.

[0042] During construction, the end plate 1, I-shaped steel, copper plate and magnet embedding plate can be pre-assembled, and after positioning, the magnet 8 is embedded and fixed in the magnet embedding plate, and the viscoelastic material is arranged between the copper plate and the magnet embedding plate.

Claims

1. An energy-absorbing coupling beam, comprising two end plates (1) detachably connected to a non-energy-absorbing section and an energy-absorbing device connected to the end plates (1), characterized in that: The energy dissipation device comprises a mild steel component and a damper, wherein the mild steel component comprises a first mild steel component (2) and a second mild steel component (9), wherein one end of the first mild steel component (2) is connected to an end plate (1), and one end of the second mild steel component (9) is connected to another end plate (1), and the damper is connected between the first mild steel component (2) and the second mild steel component (9), wherein the damper is a composite of an eddy current damper and a viscoelastic damper; The first soft steel part (2) and the second soft steel part (9) are I-shaped steels, and the I-shaped surfaces of the I-shaped steels are connected to the end plate (1); The flanges of the first soft steel part (2) and the second soft steel part (9) are flanges with recessed edges; The webs of the first soft steel member (2) and the second soft steel member (9) are provided with holes; The holes are multiple rectangular holes arranged in parallel; The composite body comprises a copper plate layer and a magnet layer, the copper plate layer comprises a plurality of copper plates, the magnet layer comprises a plurality of magnet embedding plates embedded with magnets (8), the copper plates and the magnet embedding plates are cross-fixedly connected via a viscoelastic material (7), the copper plates are fixedly connected to the first soft steel part (2), and the magnet embedding plates are fixedly connected to the second soft steel part (9); All the magnets (8) are embedded in such a way that the magnetic poles are in the same direction; The copper plate layer comprises an inner copper plate (41) connected to both sides of the web of the first soft steel member (2) and an outer copper plate (42) connected to the inner copper plate (41); the magnet layer comprises an inner magnet embedding plate (51) connected to both sides of the web of the second soft steel member (9) and an outer magnet embedding plate (52) connected to the inner magnet embedding plate (51); portions of the inner magnet embedding plate (51) and the outer magnet embedding plate (52) extending out of the web are embedded in magnets (8); the extending web portion of the copper plate layer and the extending web portion of the magnet layer are cross-fixedly connected by a viscoelastic material (7); the non-extending web portion of the inner copper plate (41) is fixedly connected to the non-extending web portion of the outer copper plate (42) by a pad (6); and the non-extending web portion of the inner magnet embedding plate (51) is fixedly connected to the non-extending web portion of the outer magnet embedding plate (52) by a pad (6).

2. The energy dissipation coupling beam according to claim 1, characterized in that: The unextended web portion of the inner copper plate (41), the unextended web portion of the outer copper plate (42), and the pad (6) are connected by bolts, and the unextended web portion of the inner magnet embedding plate (51), the unextended web portion of the outer magnet embedding plate (52), and the pad (6) are connected by bolts.

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