Rotary friction damper and friction energy consumption outrigger truss with rotary amplifying device

Abstract

The invention discloses a rotary friction damper and a friction energy dissipation outrigger truss with a rotary amplifying device, and relates to the technical field of buildings, the friction energy dissipation outrigger truss with the rotary amplifying device comprises an outrigger truss, the rotary friction damper and a supporting bracket, and the outrigger truss, the rotary friction damper and the supporting bracket work together with a giant column and a core tube shear wall of a high-rise building structure; according to the friction energy dissipation outrigger truss with the rotary amplifying device, the sliding starting force of the rotary friction damper can be controlled through the pre-tightening force of the high-strength bolt on the contact surface, locking can be kept under small earthquakes, and sliding can be started under medium earthquakes. The rotary friction damper can play a role of a fuse. Once the shear wall begins to rotate, the friction force is basically kept unchanged, so that the internal force of the surrounding structure is not increased any more, and plastic failure of the shear wall is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of construction, in particular to a rotary friction damper and a friction energy-absorbing cantilever truss with a rotary amplifying device. Background Art

[0002] In supertall buildings over 300 meters tall, outrigger truss structures are often used to connect the core tube and the perimeter frame structure. These structures work together to significantly increase the lateral stiffness of the overall structure, meeting the lateral deformation requirements under earthquake and wind loads. While outrigger truss structures improve lateral stiffness, they also have adverse effects.

[0003] The lateral stiffness of the floor containing the outrigger truss structure is significantly higher than that of the floors above and below, resulting in irregular lateral stiffness and adverse seismic performance. Furthermore, the outrigger truss structure transfers a portion of the core tube's overturning moment to the surrounding structure. High internal force transmission occurs between the core tube and the surrounding structure on the floor containing the outrigger truss structure, making the outrigger truss structure susceptible to earthquake damage. Under earthquake action, when the outrigger truss yields, it redistributes forces within the structural components, increasing stress on the core tube shear walls and causing significant plastic failure. This makes rapid post-earthquake repair difficult, leading to severe economic losses. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a rotational friction damper and a friction energy dissipation cantilever truss with a rotational amplification device, which solve at least one technical problem raised in the background art.

[0006] (2) Technical solution

[0007] The technical solution adopted in the present invention is:

[0008] A rotational friction damper, comprising:

[0009] An arc-shaped outer cover plate, one end of which can be fixedly connected to the outrigger truss;

[0010] There are two outer friction steel plates, which are arranged opposite to each other and fixed to the inner side of the arc-shaped outer cover plate; the outer friction steel plates are provided with arc-shaped long slots to allow the pre-tightening bolts to slide along the long slots;

[0011] A fan-shaped main friction steel plate, the fan-shaped main friction steel plate is located between the two outer friction steel plates; friction plates are provided on both sides of the fan-shaped main friction steel plate; bolt holes are opened on the fan-shaped main friction steel plate to install pre-tightening bolts;

[0012] Preferably, the sector-shaped main friction steel plate is hingedly connected to the bullnose on the giant column via a first pin shaft, and is hingedly connected to the outer friction steel plate via a second pin shaft.

[0013] Preferably, the fan-shaped main friction steel plate is fitted between the two outer friction steel plates; the pre-tightening bolt passes through the bolt hole of the fan-shaped main friction steel plate and the arc-shaped long slot hole of the outer friction steel plate, and provides a pre-tightening force; when the fan-shaped main friction steel plate rotates around the second pin shaft, it will drive the pre-tightening bolt to slide along the arc-shaped long slot hole of the outer friction steel plate, and consume energy through friction between the fan-shaped main friction steel plate and the outer friction steel plate.

[0014] Also provided is a friction energy dissipation cantilever truss with a rotation amplification device, the friction energy dissipation cantilever truss comprising any of the above-mentioned rotational friction dampers;

[0015] It also includes an outrigger truss, wherein the outrigger truss is fixedly connected to the mega column and the core tube shear wall;

[0016] Furthermore, one end of the sector-shaped main friction steel plate of the rotational friction damper is hinged to the giant column, and one end of the arc-shaped outer cover plate of the rotational friction damper is fixedly connected to the cantilever truss.

[0017] Preferably, the core tube shear wall includes a steel column, an upper chord extension section and a lower chord extension section, wherein the upper chord extension section is fixedly connected to the steel column, and the lower chord extension section is fixedly connected to the steel column.

[0018] Preferably, the outrigger truss comprises an upper chord and a lower chord; one end of the upper chord is fixedly connected to the section steel column, and one end of the lower chord is fixedly connected to the section steel column; the other end of the upper chord is fixedly connected to the other end of the lower chord via a vertical web member;

[0019] A first diagonal web is fixedly provided between one end of the upper chord and the other end of the lower chord, and

[0020] A second diagonal web member is fixedly arranged between the other end of the upper chord and one end of the lower chord.

[0021] Preferably, one end of the upper chord, the section steel column and the first diagonal web are fixedly connected via a second node plate;

[0022] The other end of the upper chord, the vertical web member and the second diagonal web member are fixedly connected by a first point plate;

[0023] One end of the lower chord, the section steel column and the second diagonal web are fixedly connected via a fourth node plate;

[0024] The vertical web member at the other end of the lower chord and the first diagonal web member are fixedly connected via a third node plate.

[0025] Preferably, the outrigger truss further comprises:

[0026] Up and down swings;

[0027] One end of the upper oblique rod is fixedly connected to one end of the vertical web rod; one end of the lower oblique rod is fixedly connected to the

[0028] The other end of the vertical web is fixedly connected;

[0029] Furthermore, the other end of the upper oblique rod and the other end of the lower oblique rod are both fixedly connected to the arc-shaped outer cover plate.

[0030] Preferably, a supporting corbel is fixedly provided on the side of the giant column, and the supporting corbel and the fan-shaped main friction steel plate are hingedly connected via a first pin shaft.

[0031] (3) Beneficial effects

[0032] The present invention provides a rotary friction damper and a friction energy dissipation cantilever truss with a rotary amplification device, which have the following beneficial effects compared with the prior art:

[0033] (1) In the present invention, the friction energy dissipation cantilever truss with a rotation amplification device, the sliding force of the rotation friction damper can be controlled by the pre-tightening force of the bolts on the contact surface, so that it can remain locked under small vibrations and start sliding above medium vibrations.

[0034] (2) In the present invention, the friction energy dissipation cantilever truss with a rotation amplification device and the rotational friction damper can act as a "fuse." Once rotation begins, the friction force remains essentially constant, thereby preventing the internal forces of the surrounding structure from increasing, preventing plastic failure of the shear wall, and increasing the ability to dissipate seismic energy.

[0035] (3) After an earthquake, the fan-shaped main friction steel plate slips, and the pre-tightening bolts can be loosened. After the structure returns to its original position, the pre-tightening bolts can be tightened again to restore the working state without the need for time-consuming and labor-intensive maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings and examples:

[0037] Figure 1 2. It is a schematic diagram of the arrangement of the rotational friction damper and the friction energy dissipation cantilever truss with a rotational amplification device in the overall structure according to an embodiment of the present invention;

[0038] Figure 2is an elevational view of a rotary friction damper and a friction energy dissipating cantilever truss with a rotary amplifying device according to an embodiment of the present invention;

[0039] Figure 3 is a partial cross-sectional view of a rotary friction damper and a friction energy dissipating cantilever truss with a rotary amplifying device according to an embodiment of the present invention;

[0040] Figure 4 is a cross-sectional view of a rotational friction damper according to an embodiment of the present invention;

[0041] Among them, 1 mega column, 2 core tube shear wall, 21 steel column, 22 upper chord extension, 23 lower chord extension, 3 outrigger truss, 301 upper chord, 302 lower chord, 303 first diagonal web, 304 second diagonal web, 305 first node plate, 306 second node plate, 307 third node plate, 308 fourth node plate, 309 vertical web, 310 upper diagonal member, 311 lower diagonal member, 4 rotational friction damper, 41 curved outer cover plate, 42 fan-shaped main friction steel plate, 43 outer friction steel plate, 44 pre-tightening bolt, 5 support bracket, 6 first pin, 7 second pin. Specific implementation methods

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods. Figure 1-Figure 4 shown.

[0044] In a first aspect, an embodiment of the present invention provides a rotary friction damper 4, comprising an arcuate outer cover plate 41, two outer friction steel plates 43, and a fan-shaped main friction steel plate 42, wherein one end of the arcuate outer cover plate 41 can be fixedly connected to the cantilever truss 3; the two outer friction steel plates 43 are arranged relatively parallel and fixed to the inner side of the arcuate outer cover plate 41, and the outer friction steel plates 43 have arcuate long slots to allow pre-tightening bolts 44 to slide along the long slots;

[0045] The fan-shaped main friction steel plate 42 is located between the two outer friction steel plates 43. Friction plates are provided on both sides of the fan-shaped main friction steel plate 42. The friction plates are commercially available materials and are not covered by the embodiments of the present invention. Bolt holes are opened in the fan-shaped main friction steel plate 42, which can be standard circular bolt holes for installing pre-tightening bolts 44, so as to maintain locking under small vibrations and start sliding above medium vibrations.

[0046] In one embodiment, the fan-shaped main friction steel plate 42 is hingedly connected to the bracket 5 on the giant column 1 via a first pin 6, and is hingedly connected to the outer friction steel plate 43 via a second pin 7. Furthermore, in the embodiment, the fan-shaped main friction steel plate 42 and the outer friction steel plate 43 are hingedly connected via the second pin 7. This embodiment provides a specific hinge connection method; those skilled in the art may also choose other hinge connection methods during implementation. The purpose of the hinge connection here is to enable relative rotation between the fan-shaped main friction steel plate 42 and the outer friction steel plate 43.

[0047] In one embodiment, the fan-shaped main friction steel plate 42 is fitted between the two outer friction steel plates 43; the pre-tightening bolt 44 passes through the standard circular bolt hole of the fan-shaped main friction steel plate 42 and the arc-shaped long slot hole of the outer friction steel plate 43, and provides a pre-tightening force; when the fan-shaped main friction steel plate 42 rotates around the second pin shaft 7, it will drive the pre-tightening bolt 44 to slide along the arc-shaped long slot hole of the outer friction steel plate 43, and consume energy through the friction between the fan-shaped main friction steel plate 42 and the outer friction steel plate 43.

[0048] The rotary friction damper 4 is the main energy-absorbing component of the friction energy-absorbing cantilever truss with a rotary amplification device. It dissipates the energy input to the overall structure by the earthquake through large friction energy dissipation, reduces the plastic damage of the key component that is difficult to repair, namely the core tube shear wall 2, and reduces the economic losses caused by the earthquake.

[0049] Furthermore, an embodiment of the present invention further provides a friction energy dissipation cantilever truss with a rotation amplification device, wherein the friction energy dissipation cantilever truss comprises any of the above-mentioned rotational friction dampers 4;

[0050] It also includes a giant column 1, a core tube shear wall 2 and an outrigger truss 3, wherein the giant column 1 and the core tube shear wall 2 are fixedly connected by the outrigger truss 3;

[0051] Furthermore, one end of the sector-shaped main friction steel plate 42 of the rotary friction damper is hinged to the mega-column 1, and one end of the arc-shaped outer cover plate 41 of the rotary friction damper is fixedly connected to the outrigger truss 3. Specifically, the center position of the rotary friction damper is coplanar with the horizontal center axis of the outrigger truss 3.

[0052] The friction energy dissipation cantilever truss with a rotation amplification device can utilize the relative vertical deformation between the end of the cantilever truss structure and the tower column under the action of an earthquake to cause the fan-shaped main friction steel plate 42 to rotate around the second pin shaft 7, and dissipate the seismic energy through friction between the outer friction steel plate 43, thereby increasing the structural damping, reducing earthquake damage, and thus improving the structural toughness.

[0053] In the aforementioned embodiment of the present invention, the friction-dissipating cantilever truss with a rotational amplification device can control the sliding force of the rotational friction damper through preload on the contact surface, enabling it to remain locked during minor earthquakes and initiate sliding during moderate or greater earthquakes. The rotational friction damper acts as a "fuse." Once rotation begins, the friction force remains essentially constant, preventing the internal forces of the surrounding structure from increasing and thus preventing plastic failure of the shear wall.

[0054] like Figure 2 As shown in the figure, in the friction energy dissipation cantilever truss with a rotational amplification device, l2 is the distance between the outermost bolt hole of the rotary friction damper and the center of the second pin 7, which should be as large as possible; l1 is the distance between the center of the first pin 6 and the center of the second pin 7 of the rotary friction damper. Using the principle of leverage, as the radius of the friction damper increases, the displacement amplification factor f = l1 / l2 gradually increases, increasing the rotational displacement of the rotary friction damper and improving its energy dissipation efficiency.

[0055] In one embodiment, the core tube shear wall 2 includes a profiled steel column 21, an upper chord extension 22, and a lower chord extension 23, wherein the upper chord extension 22 is fixedly connected to the profiled steel column 21, and the lower chord extension 23 is fixedly connected to the profiled steel column 21. This embodiment of the present invention provides a structure of a core tube shear wall 2. In specific embodiments, those skilled in the art may also adopt other structures.

[0056] In one embodiment, an embodiment of the present invention provides a specific structure of a cantilever truss 3, wherein the cantilever truss 3 includes an upper chord 301, a lower chord 302, a first diagonal web member 303, a second diagonal web member 304, a first node plate 305, a second node plate 306, a third node plate 307, a fourth node plate 308, a vertical web member 309, an upper diagonal member 310, and a lower diagonal member 311. The upper chord 301 and the lower chord 302 are fixedly connected to the steel column 21 inside the core tube shear wall 2; the vertical web member 309 is vertically arranged between the upper chord 301 and the lower chord 302; the two ends of the upper chord 301 are respectively provided with a first node plate 305 fixedly connected to the vertical web member 309 and a second diagonal web member 304 fixedly connected to the steel column 21 inside the core tube shear wall 2; the two ends of the lower chord 302 are respectively provided with a third node plate 307 fixedly connected to the vertical web member 309 and a The fourth node plate 308 is fixedly connected to the steel column 21; the first diagonal web member 303 is obliquely arranged between the upper chord member 301 and the lower chord member 302, and is fixedly connected to the second node plate 306 and the third node plate 307; the second diagonal web member 304 is obliquely arranged between the upper chord member 301 and the lower chord member 302, and is fixedly connected to the first node plate 305 and the fourth node plate 308; the upper diagonal member 310 is fixedly connected to one end of the vertical web member 309; the lower diagonal member 311 is fixedly connected to the other end of the vertical web member 309.

[0057] In one embodiment, a supporting corbel 5 is fixedly provided on the side of the giant column 1 , and the supporting corbel 5 and the fan-shaped main friction steel plate 42 are hingedly connected via a first pin 6 .

[0058] Specifically, the rotary friction damper 4 of the present invention can flexibly adjust the preload force of the preload bolt 44, thereby changing the starting force of the friction damper so that it can operate under small, medium, and large earthquakes, meeting the needs of different performance-based designs. Under the action of a small earthquake, the friction damper does not rotate, and the end of the cantilever truss and the giant column are equivalent to a rigid connection, providing lateral stiffness for the entire structure; under the action of a medium or large earthquake, the rotary friction damper begins to rotate, and the damper can act as a "fuse" because once it begins to rotate, its friction force remains essentially unchanged, so that the internal force of the substructure no longer increases, preventing damage to other components. At the same time, the displacement amplification function of the rotary friction damper itself effectively improves the working efficiency of the damper, consumes a large amount of external input energy, reduces damage to the key component core tube shear wall, and thus improves the toughness of the structure.

[0059] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rotary friction damper, characterized in that: The rotational friction damper comprises: An arc-shaped outer cover plate (41), one end of which can be fixedly connected to the cantilever truss (3); The outer friction steel plates (43) are two and are arranged opposite to each other and fixed to the inner side of the arc-shaped outer cover plate (41); the outer friction steel plates (43) are provided with arc-shaped long slot holes to allow the pre-tightening bolts (44) to slide along the long slots; A fan-shaped main friction steel plate (42) is located between the two outer friction steel plates (43); friction plates are provided on both sides of the fan-shaped main friction steel plate (42); and bolt holes are opened in the fan-shaped main friction steel plate (42) to install pre-tightening bolts (44).

2. The rotary friction damper according to claim 1, characterized in that The fan-shaped main friction steel plate (42) is hingedly connected to the bull leg (5) on the giant column (1) via a first pin shaft (6), and is hingedly connected to the outer friction steel plate (43) via a second pin shaft (7).

3. The rotational friction damper according to claim 1, characterized in that: The fan-shaped main friction steel plate (42) is fitted between the two outer friction steel plates (43); the pre-tightening bolt (44) passes through the bolt hole of the fan-shaped main friction steel plate (42) and the arc-shaped long slot hole of the outer friction steel plate (43), and provides a pre-tightening force; when the fan-shaped main friction steel plate (42) rotates around the second pin shaft (7), it drives the pre-tightening bolt (44) to slide along the arc-shaped long slot hole of the outer friction steel plate (43), and consumes energy through friction between the fan-shaped main friction steel plate (42) and the outer friction steel plate (43).

4. A friction energy dissipation cantilever truss with a rotation amplification device, characterized in that: The friction energy dissipation cantilever truss comprises the rotational friction damper according to any one of claims 1 to 3; It also includes an outrigger truss (3), wherein the outrigger truss (3) is fixedly connected to the giant column (1) and the core tube shear wall (2); Furthermore, one end of the fan-shaped main friction steel plate (42) of the rotary friction damper is hinged to the bracket (5) of the giant column (1), and one end of the arc-shaped outer cover plate (41) of the rotary friction damper is fixedly connected to the cantilever truss (3).

5. The friction energy dissipation cantilever truss with a rotation amplification device according to claim 4, characterized in that: The core tube shear wall (2) comprises a steel column (21), an upper chord extension section (22), and a lower chord extension section (23), wherein the upper chord extension section (22) is fixedly connected to the steel column (21), and the lower chord extension section (23) is fixedly connected to the steel column (21).

6. The friction energy dissipation cantilever truss with a rotation amplification device according to claim 4, characterized in that: The cantilever truss (3) includes an upper chord (301) and a lower chord (302); one end of the upper chord (301) is fixedly connected to the section steel column (21), and one end of the lower chord (302) is fixedly connected to the section steel column (21); the other end of the upper chord (301) is fixedly connected to the other end of the lower chord (302) via a vertical web member (309); A first diagonal web is fixedly provided between one end of the upper chord (301) and the other end of the lower chord (302). (303), and a second diagonal web member (304) is fixedly provided between the other end of the upper chord member (301) and one end of the lower chord member (302).

7. The friction energy dissipation cantilever truss with a rotation amplification device according to claim 6, characterized in that: One end of the upper chord (301), the section steel column (21), and the first diagonal web member (303) are fixedly connected via a second node plate (306); The other end of the upper chord (301), the vertical web member (309) and the second diagonal web member (304) are connected through a first point Plate (305) is fixedly connected; One end of the lower chord (302), the section steel column (21), and the second diagonal web member (304) are fixedly connected via a fourth node plate (308); The vertical web member (309) at the other end of the lower chord member (302) and the first diagonal web member (303) are fixedly connected via a third node plate (307).

8. The friction energy dissipation cantilever truss with a rotation amplification device according to claim 6, characterized in that: Also includes: an upper oblique rod (310) and a lower oblique rod (311); One end of the upper oblique rod (310) is fixedly connected to one end of the vertical web rod (309); One end of (311) is fixedly connected to the other end of the vertical web bar (309); Furthermore, the other end of the upper oblique rod (310) and the other end of the lower oblique rod (311) are both fixedly connected to the arc-shaped outer cover plate (41).

9. The friction energy dissipation cantilever truss with a rotation amplification device according to claim 6, characterized in that: The giant A supporting bracket (5) is fixedly provided on the side of the column (1), and the supporting bracket (5) and the fan-shaped main friction steel plate (42) are hingedly connected via a first pin shaft (6).

Images