A frame core tube structure with flexible energy dissipation connection

Abstract

The present invention provides a frame core tube structure with a flexible energy dissipation connection, characterized in that it includes: a core tube part; a frame part, which is sleeved on the outside of the core tube part; and a plurality of flexible energy dissipation nodes, which are used to connect the core tube part and the frame part, wherein each flexible energy dissipation node includes a pre-embedded anchor, at least one steel corbel and at least one viscoelastic seismic isolation bearing, the pre-embedded anchor is anchored on the core tube part, the steel corbel is connected to the pre-embedded anchor, and the viscoelastic seismic isolation bearing is arranged on the steel corbel and connected to the frame part. The frame core tube structure with a flexible energy dissipation connection provided by the present invention has the characteristics of simple structure and high structural damping ratio, which is conducive to reducing seismic damage to structural components and non-structural components of a building body caused by seismic action, does not require the use of supplementary measures for structural reset, and does not increase the structural design burden of the building body.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering structure engineering, and in particular to a frame core tube structure with flexible energy dissipation connection. Background Art

[0002] The frame core tube structure is a widely used super high-rise building structure. The structure consists of a shear frame (shear deformation unit) and a core tube (bending deformation unit). The frame and the core tube are rigidly connected through the floor slab. Under strong earthquakes, the core tube in the rigidly connected frame core tube structure bears the main horizontal inertia force, so the core tube is prone to damage that is difficult to repair.

[0003] The frame core tube structures with flexible connections in the prior art include "buckling restrained support + side rubber bearings" and "friction damper + side rubber bearings", both of which are "weak structure" structures with low stiffness and high damping. In the frame core tube structures with flexible connections in the prior art, the core tube no longer bears the vertical load from the building, resulting in an increase in the overall structural design burden of the building. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problem, and its purpose is to provide a frame core tube structure with flexible energy dissipation connection. To this end, the following technical solutions are provided.

[0005] The present invention provides a frame core tube structure with a flexible energy-absorbing connection, which has the following characteristics: a core tube part; a frame part, which is sleeved on the outside of the core tube part; and a plurality of flexible energy-absorbing nodes, which are used to connect the core tube part and the frame part, wherein each flexible energy-absorbing node includes a pre-embedded anchor, at least one steel corbel and at least one viscoelastic seismic isolation bearing, the pre-embedded anchor is anchored on the core tube part, the steel corbel is connected to the pre-embedded anchor, and the viscoelastic seismic isolation bearing is arranged on the steel corbel and connected to the frame part.

[0006] In the frame core tube structure with flexible energy-absorbing connection provided by the present invention, it can also have the following characteristics: wherein, the viscoelastic seismic isolation bearing includes a top plate, a bottom plate and a viscoelastic damping material interlayer, the top plate is arranged on the frame part, the bottom plate is arranged on the steel corbel, and the viscoelastic damping material interlayer is arranged between the top plate and the bottom plate.

[0007] In the frame core tube structure of the flexible energy dissipation connection provided by the present invention, it can also have the following characteristics: wherein each flexible energy dissipation node includes two steel brackets and two viscoelastic seismic isolation supports, and the two steel brackets are arranged at right angles.

[0008] The frame core tube structure of the flexible energy dissipation connection provided by the present invention may also have the following feature: wherein the core tube portion is in the shape of a rectangular parallelepiped.

[0009] In the frame core tube structure with flexible energy-absorbing connection provided by the present invention, it can also have the following characteristics: wherein, the frame part includes inner side beams, frame steel columns and frame steel beams, the inner side beams are rectangular and are arranged around the core tube part, the frame steel columns are perpendicular to the inner side beams and are arranged around the core tube, and the frame steel beams are used to connect the inner side beams and the frame steel columns.

[0010] The frame core tube structure with flexible energy dissipation connection provided by the present invention may also have the following characteristics: wherein, rigid connections are adopted between the inner side beams and the frame steel beams and between the frame steel beams and the frame steel columns.

[0011] In the frame core tube structure with flexible energy-absorbing connection provided by the present invention, it can also have the following characteristics: wherein, the embedded anchor includes an embedded plate group and two end plates, the embedded plate group is anchored at the corner of the core tube part, and includes four embedded plates, the four embedded plates are grouped in pairs, the two embedded plates in each group are parallel to each other, the two groups of embedded plates are perpendicular to each other, and the two end plates are respectively arranged perpendicular to each other at one end of the two groups of embedded plates.

[0012] The frame core tube structure with flexible energy dissipation connection provided by the present invention may also have the following feature: a plurality of protrusions perpendicular to the surface of the embedded plate are arranged on the surface of the embedded plate.

[0013] In the frame core tube structure with flexible energy-absorbing connection provided by the present invention, it can also have the following characteristics: wherein, the steel corbel includes a connecting plate, two webs, an upper flange and a lower flange, the connecting plate is arranged on the end plate, the two webs are vertically arranged on the connecting plate in parallel with each other, the upper flange is arranged on the upper side edges of the two webs and vertically connected to the connecting plate, and the lower flange is arranged on the lower side edges of the two webs and is connected to the connecting plate and the upper flange.

[0014] In the frame core tube structure with flexible energy-absorbing connection provided by the present invention, it can also have the following characteristics: wherein, the steel corbel also includes two stiffening ribs, the two stiffening ribs are respectively arranged on the plate surfaces of the two webs perpendicularly to the two webs, and are connected to the upper flange and the lower flange.

[0015] Functions and Effects of the Invention

[0016] According to the frame core tube structure with flexible energy dissipation connection provided by the present invention, a plurality of flexible energy dissipation nodes are arranged at the connection between the core tube portion and the frame portion, the embedded anchors of the flexible energy dissipation nodes are anchored in the core tube portion, at least one steel corbel is connected to the embedded anchors, and at least one viscoelastic seismic isolation bearing is arranged on the frame portion and connected to the steel corbel. The viscoelastic seismic isolation bearing can reduce the horizontal inertial force transmitted from the frame portion to the core tube portion, and reduce the damage to the core tube portion caused by earthquakes. In the frame core tube structure with flexible energy dissipation connection provided by the present invention, the flexible energy dissipation nodes can transfer the vertical load from the building on the frame portion to the core tube portion, without adding extra burden to the building structure design.

[0017] Therefore, the frame core tube structure with flexible energy dissipation connection provided by the present invention is simple in structure, which is beneficial to reducing the damage to the core tube part caused by earthquake action, and does not increase the structural design burden of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of a frame core tube structure with flexible energy dissipation connection in an embodiment of the present invention;

[0019] Figure 2 is a structural schematic diagram of a standard layer of a frame core tube structure with flexible energy dissipation connection in an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a frame portion of a standard layer in an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the core tube, inner side beams and flexible energy dissipation nodes of a standard layer in an embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of the structure of a flexible energy consumption node in an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the embedded anchor and the steel bracket in the embodiment of the present invention;

[0024] Figure 7 is an exploded view of the embedded anchor and the steel corbel in the embodiment of the present invention;

[0025] Figure 8 is a schematic structural diagram of a viscoelastic seismic isolation bearing in an embodiment of the present invention; and

[0026] Fig. 9 is an exploded view of the viscoelastic seismic isolation bearing in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the frame core tube structure of the flexible energy-absorbing connection of the present invention.

[0028] <Example>

[0029] Figure 1 It is a structural schematic diagram of a frame core tube structure with flexible energy dissipation connection in an embodiment of the present invention.

[0030] Figure 2 It is a structural schematic diagram of a standard layer of a frame core tube structure with flexible energy dissipation connection in an embodiment of the present invention.

[0031] like Figure 1 and Figure 2 As shown, the flexible energy dissipation connection frame core tube structure 100 includes a core tube part 10, a frame part 20 and a plurality of flexible energy dissipation nodes 30. The overall structure of the flexible energy dissipation connection frame core tube structure 100 can be vertically divided into a plurality of standard layers 40, and the following description takes the standard layer 40 as an example.

[0032] The core tube 10 is in a rectangular parallelepiped shape and is cast by reinforced concrete.

[0033] Figure 3 Schematic diagram of the structure of the frame portion of the standard layer in the embodiment of the present invention.

[0034] like Figure 3 As shown, the frame part 20 is sleeved on the outside of the core tube part 10, including an inner side beam 21, a plurality of frame steel columns 22 and a plurality of frame steel beams 23. The inner side beam 21 is rectangular and is wound around the core tube part 10. The plurality of frame steel columns 22 are perpendicular to the inner side beam 21 and are symmetrically arranged around the core tube 10. The plurality of frame steel beams 23 connect the inner side beam 21 and the plurality of frame steel columns 22. Rigid connections are adopted between the inner side beam 21 and the frame steel beam 23 and between the frame steel column 22 and the frame steel beam 23.

[0035] Figure 4 It is a schematic structural diagram of the core tube, inner side beams and flexible energy dissipation nodes of a standard layer in an embodiment of the present invention.

[0036] Figure 5 It is a schematic diagram of the structure of a flexible energy consumption node in an embodiment of the present invention.

[0037] like Figure 4 As shown, in this embodiment, each standard layer 40 includes four flexible energy dissipation nodes 30, which are respectively arranged at the four corners of the core tube 10, and the flexible energy dissipation nodes 30 can connect the core tube 10 and the inner side beam 21. Figure 5As shown, each flexible energy dissipation node 30 includes a pre-embedded anchor 31, at least one steel corbel 32 and at least one viscoelastic seismic isolation bearing 33. In the present embodiment, the number of steel corbels 32 and viscoelastic seismic isolation bearings 33 is two. In practical applications, the number of steel corbels 32 and viscoelastic seismic isolation bearings 33 can be increased or decreased according to actual conditions.

[0038] Figure 6 Schematic diagram of the structure of the embedded anchor and the steel bracket in the embodiment of the present invention;

[0039] Figure 7 is an exploded view of the embedded anchor and the steel corbel in the embodiment of the present invention;

[0040] like Figure 6 and Figure 7 As shown, the embedded anchor 31 includes an embedded plate group 311 and two end plates 312. One end of the embedded plate group 311 is anchored at the corner of the core tube 10, including four embedded plates. The four embedded plates are grouped in pairs, and the two embedded plates in each group are parallel to each other. The two groups of embedded plates are perpendicular to each other. The two end plates 312 are respectively arranged at one end of the two groups of embedded plates at right angles to each other, and a plurality of first bolt holes are provided on the end plates 312. The surface of the embedded plate is provided with a plurality of protrusions perpendicular to the surface of the embedded plate, and the protrusions can increase the surface roughness of the embedded plate, thereby increasing the connection firmness between the embedded plate group and the core tube.

[0041] The steel corbel 32 includes a connecting plate 321, two webs 322, an upper flange 323, a lower flange 324 and two stiffening ribs 325. The connecting plate 321 is provided with a plurality of second bolt holes corresponding to the first bolt holes on the end plate 312. The connecting plate 321 is fixed to the end plate 312 by passing a plurality of bolts through and locking in the first and second bolt holes. The two webs 322 are arranged parallel to each other on the connecting plate 321. The upper flange 323 is arranged at the upper side edges of the two webs 322 and is vertically connected to the connecting plate 321. The upper flange 323 is provided with a plurality of third bolt holes. The lower flange 324 is arranged at the lower side edges of the two webs 322 and is connected to the connecting plate 321 and the upper flange 324. Two stiffening ribs 325 are respectively arranged on the plate surfaces of the two webs 322 in a manner perpendicular to the two webs 322 and connected to the upper flange 323 and the lower flange 324 . The stiffening ribs 325 can improve the stability and torsional resistance of the steel corbel 32 .

[0042] The viscoelastic seismic isolation support 33 can reduce the horizontal inertial force transmitted from the frame part 20 to the core tube part 10, and includes a top plate 331, a bottom plate 332, and a viscoelastic damping material interlayer 333. A plurality of fourth bolt holes are provided on the top plate 331, and a plurality of fifth bolt holes corresponding to the fourth bolt holes are provided on the inner side beam 21. The top plate 331 is fixed to the inner side beam 21 by a plurality of bolts passing through and locking in the fourth and fifth bolt holes. A plurality of sixth bolt holes corresponding to the third bolt holes on the upper flange 323 are provided on the bottom plate 332, and the bottom plate 332 is fixed to the upper flange 323 of the steel corbel 32 by a plurality of spirals passing through and locking in the third and sixth bolt holes. The viscoelastic damping material interlayer 333 is arranged between the top plate 331 and the bottom plate 332. In this embodiment, the viscoelastic damping material interlayer 333 is made of rubber.

[0043] Under the action of gravity load, the frame part of the flexible energy-absorbing frame core tube structure 100 provided by the present invention transfers a part of the gravity load received by itself from the building through the inner side beam 21 to the viscoelastic seismic isolation support 33, and then to the steel corbel 32, and finally to the core tube part 10 through the embedded anchor 31. The flexible energy-absorbing frame core tube structure 100 provided by the present invention has basically the same gravity load transfer path as the rigidly connected frame core tube structure in the prior art, and does not add any additional burden to the building structure design.

[0044] Under the action of an earthquake, a horizontal relative displacement occurs between the core tube portion 10 and the frame portion 20, driving the viscoelastic damping material interlayer 333 in the viscoelastic seismic isolation support 33 to undergo shear deformation, thereby consuming seismic energy and reducing seismic damage to the structural and non-structural components of the building. The seismic energy input to the flexible energy-absorbing frame core tube structure 100 is consumed by the additional damping of the flexible energy-absorbing connection node 30. Therefore, the structural damping ratio of the flexible energy-absorbing frame core tube structure 100 provided by the present invention is higher than that of the frame core tube structure in the prior art. The shear deformation of the viscoelastic damping material interlayer 333 under the action of an earthquake is an elastic deformation or a smaller plastic deformation. The viscoelastic damping material interlayer 333 can effectively avoid a larger residual deformation after an earthquake, and no supplementary measures are required for structural restoration.

[0045] Functions and Effects of the Embodiments

[0046] According to the frame core tube structure with flexible energy dissipation connection provided by the present invention, in this embodiment, a plurality of flexible energy dissipation nodes are arranged at the connection between the core tube part and the frame part, one end of the embedded plate group of the embedded anchor in the flexible energy dissipation node is anchored in the four corners of the core tube part, the two steel brackets are connected to the end plate on the embedded anchor, and the viscoelastic seismic isolation bearing is arranged on the inner side beam and connected to the upper flange of the two steel brackets. The viscoelastic seismic isolation bearing can reduce the horizontal inertial force transmitted from the frame part to the core tube part, thereby reducing the seismic damage to the structural components and non-structural components of the building body caused by the earthquake. In the frame core tube structure with flexible energy dissipation connection provided by the present invention, the flexible energy dissipation node can transfer the vertical load from the building body on the frame part to the core tube part without adding any additional burden to the building structure design. In addition, the viscoelastic damping material interlayer in the flexible energy dissipation node only undergoes elastic deformation or small plastic deformation under the action of earthquake, so that the frame core tube structure with flexible energy dissipation connection provided by the present invention has a higher structural damping ratio, and no supplementary measures are required for structural reset.

[0047] Therefore, the frame core tube structure with flexible energy-absorbing connection provided by the present invention has the characteristics of simple structure and high structural damping ratio, which is beneficial to reducing the seismic damage to the structural components and non-structural components of the building caused by seismic action. There is no need to adopt supplementary measures for structural restoration and no additional burden on the structural design of the building is added.

[0048] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A frame core tube structure with flexible energy dissipation connection, characterized in that: include: Core tube; A frame part, sleeved outside the core tube part; A plurality of flexible energy-dissipating nodes are used to connect the core tube part and the frame part. Each of the flexible energy dissipation nodes includes a pre-buried anchor, at least one steel bracket and at least one viscoelastic seismic isolation support. The embedded anchor is anchored on the core tube. The steel corbel is connected to the embedded anchor. The viscoelastic seismic isolation support is arranged on the frame portion and connected to the steel bracket. The viscoelastic seismic isolation support comprises a top plate, a bottom plate and a viscoelastic damping material interlayer. The top plate is arranged on the frame part, and the bottom plate is arranged on the steel corbel. The viscoelastic damping material interlayer is arranged between the top plate and the bottom plate, Each of the flexible energy dissipation nodes includes two steel brackets and two viscoelastic seismic isolation supports. The two steel brackets are arranged at right angles to each other. The core tube is in a rectangular shape. The embedded anchoring member comprises an embedded plate group and two end plates. The embedded plate group is anchored at the corner of the core tube, and includes four embedded plates. The four embedded plates are grouped in pairs, the two embedded plates in each group are parallel to each other, and the two groups of embedded plates are perpendicular to each other. The two end plates are respectively arranged perpendicularly to each other at one end of the two groups of embedded plates.

2. The frame core tube structure with flexible energy dissipation connection according to claim 1 is characterized in that: in, The frame part includes inner side beams, frame steel columns and frame steel beams. The inner side beam is rectangular and wound around the core tube. The frame steel column is perpendicular to the inner side beam and is arranged around the core tube. The frame steel beam is used to connect the inner side beam and the frame steel column.

3. The frame core tube structure with flexible energy dissipation connection according to claim 2 is characterized in that: in, The inner side beam and the frame steel beam as well as the frame steel beam and the frame steel column are rigidly connected.

4. The frame core tube structure with flexible energy dissipation connection according to claim 1 is characterized in that: in, The embedded anchoring member comprises an embedded plate group and two end plates. The embedded plate group is anchored at the corner of the core tube, and includes four embedded plates. The four embedded plates are grouped in pairs, the two embedded plates in each group are parallel to each other, and the two groups of embedded plates are perpendicular to each other. The two end plates are respectively arranged perpendicularly to each other at one end of the two groups of embedded plates.

5. The frame core tube structure with flexible energy dissipation connection according to claim 4 is characterized in that: in, The surface of the embedded plate is provided with a plurality of protrusions perpendicular to the surface of the embedded plate.

6. The frame core tube structure with flexible energy dissipation connection according to claim 4 is characterized in that: in, The steel corbel includes a connecting plate, two webs, an upper flange and a lower flange. The connecting plate is arranged on the end plate, The two webs are arranged parallel to each other and vertically on the connecting plate. The upper flange is arranged on the upper side edges of the two webs and is vertically connected to the connecting plate. The lower flange is arranged on the lower side edges of the two web plates and is connected to the connecting plate and the upper flange.

7. The frame core tube structure with flexible energy dissipation connection according to claim 6 is characterized in that: in, The steel corbel also includes two stiffening ribs. The two stiffening ribs are respectively arranged on the plate surfaces of the two webs in a manner perpendicular to the two webs and connected to the upper flange and the lower flange.

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