Prefabricated Friction Metal Damper with Earthquake Monitoring and Staged Energy Dissipation Functions

Abstract

The present invention discloses an assembled friction metal damper with both seismic monitoring and staged energy dissipation functions, comprising: an I-shaped steel plate, friction plates, U-shaped steel plates and energy dissipation elements. The energy dissipation elements include a first curved variable cross-section I-shaped energy dissipation element and a second curved variable cross-section I-shaped energy dissipation element. One side of the I-shaped steel plate is connected to the first curved variable cross-section I-shaped energy dissipation element by bolts. There are two friction plates and two U-shaped steel plates. The two U-shaped steel plates are respectively arranged on both sides of the I-shaped steel plate, and the two U-shaped steel plates are connected to the I-shaped steel plate as a whole by bolts. The friction plates are clamped between the U-shaped steel plates and the I-shaped steel plate. The two U-shaped steel plates are also fixedly connected to the second curved variable cross-section I-shaped energy dissipation element by bolts. The beneficial effect of the present invention is that it uses two deformation mechanisms of friction and metal deformation to dissipate energy, providing reasonable in-plane and out-of-plane stiffness and energy dissipation for the damper, and the overall performance level of the structure can be monitored in real time through strain sensors.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake resistance in structural engineering, and more specifically to an assembled friction metal damper with earthquake monitoring and staged energy dissipation functions. Background Art

[0002] In recent years, earthquakes have occurred frequently in China, causing serious damage to high-rise building structures and multi-story residential buildings with dense population and complex functions. To improve seismic performance, dampers are often installed at the parts with large deformations in the structure to absorb seismic energy, and the damaged dampers are quickly replaced after the earthquake to restore the seismic toughness of the building.

[0003] However, the existing dampers have the following defects. For example, shear-type steel plate dampers often use the plastic deformation of metals to dissipate seismic energy, but it is not easy to enter the yield energy dissipation under small displacements, and the ductility needs to be improved under large displacements. Their structures mostly use welding technology and are prone to cracking under high-frequency seismic displacements, resulting in premature withdrawal from work; friction dampers can dissipate energy under small displacements, but their energy dissipation capacity for large earthquakes is insufficient. At the same time, the states of these dampers during earthquakes are often difficult to monitor, and the seismic responses cannot be fed back in real time.

[0004] Therefore, how to provide a solution to the problems that the existing dampers are prone to cracking under high-frequency seismic displacements, resulting in premature withdrawal from work, and the strain data cannot be monitored during earthquakes. Summary of the Invention

[0005] In view of this, the present invention provides an assembled friction metal damper with earthquake monitoring and staged energy dissipation functions, aiming to overcome the above defects.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An assembled friction metal damper with earthquake monitoring and staged energy dissipation functions, comprising: an I-shaped steel plate, friction plates, U-shaped steel plates, and energy dissipation elements. The energy dissipation elements include a first curved variable cross-section I-shaped energy dissipation element and a second curved variable cross-section I-shaped energy dissipation element. One side of the I-shaped steel plate is connected to the first curved variable cross-section I-shaped energy dissipation element by bolts. There are two friction plates and two U-shaped steel plates. The two U-shaped steel plates are respectively arranged on both sides of the I-shaped steel plate, and the two U-shaped steel plates are connected to the I-shaped steel plate as a whole by bolts. The friction plates are clamped between the U-shaped steel plates and the I-shaped steel plate, and the two U-shaped steel plates are also fixedly connected to the second curved variable cross-section I-shaped energy dissipation element by bolts.

[0008] Further, it further includes embedded connectors. There are two embedded connectors, and the two embedded connectors are respectively connected to the ends of the first curved variable cross-section I-shaped energy dissipation element and the second curved variable cross-section I-shaped energy dissipation element that are away from the I-shaped steel plate.

[0009] Further, the embedded connector includes a U-shaped connecting plate, a reinforcing plate and an anchor. The anchor is arranged on the back side of the opening direction of the U-shaped connecting plate, and the reinforcing plate is fixedly connected to the U-shaped connecting plate and is on the same side as the anchor.

[0010] Further, shear studs and flexural studs are arranged on the reinforcing plate.

[0011] Further, it further includes a U-shaped support and a shear plate. The U-shaped support is used to connect the U-shaped connecting plate and the energy dissipation element, and the shear plate is used to connect the U-shaped support and the energy dissipation element.

[0012] Further, it further includes a strain sensor and a terminal device. The strain sensor is arranged on the first curved variable cross-section I-shaped energy dissipation element to monitor strain data, and the strain sensor is electrically connected to the terminal device.

[0013] Through the above technical solutions, compared with the prior art, the present invention discloses an assembled friction metal damper with both earthquake monitoring and staged energy dissipation functions. Through the setting of friction plates, it uses two deformation mechanisms of friction and metal deformation to dissipate energy, improving the shortcoming of the single energy dissipation form of traditional dampers. At the same time, through the setting of the first curved variable cross-section I-shaped energy dissipation element and the second curved variable cross-section I-shaped energy dissipation element, reasonable in-plane and out-of-plane stiffness and energy dissipation are provided for the damper. Through the setting of the strain sensor, earthquake response data can be collected, processed and transmitted to the terminal device at one-to-one moments. Through the preset structural performance level judgment standard of the terminal device, the overall performance level of the structure can be monitored in real time. At the same time, each structural member is connected by bolts, which is easy to replace after an earthquake and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0015] Figure 1 The drawings are the structural schematic diagrams of the assembled friction metal damper with both earthquake monitoring and staged energy dissipation functions provided by the present invention;

[0016] Figure 2 The accompanying drawing is a schematic structural view of the assembled friction metal damper with both seismic monitoring and stepped energy dissipation functions provided by the present invention from another perspective;

[0017] Figure 3 The accompanying drawing is a schematic structural view of the friction plate provided by the present invention;

[0018] Figure 4 The accompanying drawing is a front sectional view of the I-shaped steel plate provided by the present invention;

[0019] Figure 5 The accompanying drawing is a sectional view of the I-shaped steel plate in the A-A direction provided by the present invention;

[0020] Figure 6 The accompanying drawing is a sectional view of the I-shaped steel plate in the B-B direction provided by the present invention;

[0021] Figure 7 The accompanying drawing is a front sectional view of the U-shaped steel plate provided by the present invention;

[0022] Figure 8 The accompanying drawing is a sectional view of the U-shaped steel plate in the A-A direction provided by the present invention;

[0023] Figure 9 The accompanying drawing is a sectional view of the U-shaped steel plate in the B-B direction provided by the present invention;

[0024] Figure 10 The accompanying drawing is a three-dimensional structural view of the first / second curved variable cross-section I-shaped energy dissipation element provided by the present invention;

[0025] Figure 11 The accompanying drawing is a front sectional view of the first / second curved variable cross-section I-shaped energy dissipation element provided by the present invention;

[0026] Figure 12 The accompanying drawing is a sectional view of the first / second curved variable cross-section I-shaped energy dissipation element in the A-A direction provided by the present invention;

[0027] Figure 13 The accompanying drawing is a sectional view of the first / second curved variable cross-section I-shaped energy dissipation element in the B-B direction provided by the present invention;

[0028] Figure 14 The accompanying drawing is a front sectional view of the connection between the U-shaped connecting plate and the reinforcing plate provided by the present invention;

[0029] Figure 15 The accompanying drawing is a sectional view of the connection between the U-shaped connecting plate and the reinforcing plate in the A-A direction provided by the present invention;

[0030] Figure 16 The accompanying drawing is a sectional view of the connection between the U-shaped connecting plate and the reinforcing plate in the B-B direction provided by the present invention;

[0031] Figure 17 The attached drawing is a cross-sectional view in the C-C direction of the connection between the U-shaped connecting plate and the reinforcing plate provided by the present invention;

[0032] Figure 18 The attached drawing is a front cross-sectional view of the U-shaped support provided by the present invention;

[0033] Figure 19 The attached drawing is a cross-sectional view in the A-A direction of the U-shaped support provided by the present invention;

[0034] Figure 20 The attached drawing is a cross-sectional view in the B-B direction of the U-shaped support provided by the present invention;

[0035] Figure 21 The attached drawing is a structural schematic diagram of the shear-resistant plate provided by the present invention;

[0036] Figure 22 The attached drawing is a structural schematic diagram of Embodiment 2 provided by the present invention;

[0037] Figure 23 The attached drawing is a structural schematic diagram of Embodiment 3 provided by the present invention;

[0038] Figure 24 The attached drawing is a structural schematic diagram of Embodiment 4 provided by the present invention.

[0039] Wherein: 1 is an I-shaped steel plate; 2 is a friction plate; 3 is a U-shaped steel plate; 4 is an energy dissipation element; 41 is a first curved variable cross-section I-shaped energy dissipation element; 42 is a second curved variable cross-section I-shaped energy dissipation element; 5 is a pre-embedded connecting piece; 51 is a U-shaped connecting plate; 52 is a reinforcing plate; 53 is an anchor; 6 is a shear-resistant stud; 7 is a bending-resistant stud; 8 is a U-shaped support; 9 is a shear-resistant plate; 10 is a strain sensor; 11 is a shear wall; 12 is a connecting beam; 13 is an upper frame beam; 14 is a concrete connecting pier; 15 is a lower frame beam. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment 1

[0042] See Figure 1-21, an embodiment of the present invention discloses an assembled friction metal damper with both seismic monitoring and stepped energy dissipation functions, including: an I-shaped steel plate 1, friction plates 2, U-shaped steel plates 3, and energy dissipation elements 4. The energy dissipation elements 4 include a first curved variable cross-section I-shaped energy dissipation element 41 and a second curved variable cross-section I-shaped energy dissipation element 42. One side of the I-shaped steel plate 1 is connected to the first curved variable cross-section I-shaped energy dissipation element 41 by bolts. There are two friction plates 2 and two U-shaped steel plates 3. The two U-shaped steel plates 3 are respectively arranged on both sides of the I-shaped steel plate 1. The two U-shaped steel plates 3 are connected to the I-shaped steel plate 1 as a whole by bolts. The friction plates 2 are clamped between the U-shaped steel plates 3 and the I-shaped steel plate 1. The two U-shaped steel plates 3 are also fixedly connected to the second curved variable cross-section I-shaped energy dissipation element 42 by bolts, thereby connecting the first curved variable cross-section I-shaped energy dissipation element 41, the second curved variable cross-section I-shaped energy dissipation element 42, the I-shaped steel plate 1, the friction plates 2, and the U-shaped steel plates 3 as a whole.

[0043] In this embodiment, it further includes embedded connectors 5. There are two embedded connectors 5, and the two embedded connectors 5 are respectively connected to one ends of the first curved variable cross-section I-shaped energy dissipation element 41 and the second curved variable cross-section I-shaped energy dissipation element 42 that are far away from the I-shaped steel plate 1. Among them, the embedded connector 5 includes a U-shaped connecting plate 51, a reinforcing plate 52, and an anchor 53. The anchor 53 is arranged on the back side of the opening direction of the U-shaped connecting plate 51. There is a reinforcing rib in the notch of the U-shaped connecting plate 51. The reinforcing rib is connected to the two side walls and the bottom of the U-shaped connecting plate 51. There are through holes for passing bolts on the reinforcing rib. The reinforcing plate 52 is fixedly connected to the U-shaped connecting plate 51 and is on the same side as the anchor 53. Specifically, there are four anchors 53, and the four anchors 53 are respectively arranged at the four corners of the U-shaped connecting plate 51. At the same time, shear studs 6 and flexural studs 7 are arranged on the reinforcing plate 52. The shear studs 6 and the flexural studs 7 are both fixed on the surface of the reinforcing plate 52 by welding. The shear studs 6 are used to improve the bonding force between it and the concrete, and the anchoring length of the damper is enhanced through the anchors 53 and the flexural studs 7 to improve the flexural bearing capacity.

[0044] In this embodiment, it further includes a U-shaped support 8 and a shear plate 9. The U-shaped support 8 is used to connect the U-shaped connecting plate 51 and the energy dissipation element 4, and the shear plate 9 is used to connect the U-shaped support 8 and the energy dissipation element 4. Specifically, two U-shaped supports 8 are provided on each side of the energy dissipation element 4 and the U-shaped connecting plate 51. The openings of the two U-shaped supports 8 on one side are arranged opposite to each other, so that the two U-shaped supports 8 form a rectangular frame. Then, the corresponding through holes on the U-shaped support 8 and the energy dissipation element 4 are connected by bolts, and the corresponding through holes on the U-shaped support 8 and the U-shaped connecting plate 51 are connected by bolts. Finally, the shear plates 9 are respectively placed in the rectangular frames formed by the two U-shaped supports 8 on the same side. There are two rows of through holes on the shear plate 9. One row of through holes is aligned with the through holes provided on the U-shaped connecting plate 51, and the other row of through holes is aligned with the through holes provided on the energy dissipation element 4. At this time, the U-shaped connecting plate 51 and the corresponding energy dissipation element 4 are connected into one body by bolts and the shear plate 9.

[0045] Meanwhile, in this embodiment, it further includes a strain sensor 10 and a terminal device (not shown in the figure). The strain sensor 10 is arranged on the first curved variable cross-section I-shaped energy dissipation element 41 to monitor the strain data of the first curved variable cross-section I-shaped energy dissipation element 41, thereby monitoring the strain of the entire damper. The strain sensor 10 is electrically connected to the terminal device. During operation, the strain sensor 10 can collect, process and transmit the earthquake response data to the terminal device at one-to-one moments, and the performance level of the overall structure of the damper can be monitored in real time through the structural performance level determination standard preset in the terminal device.

[0046] This damper adopts friction energy dissipation and metal deformation energy dissipation in stages. In the case of small earthquakes, the friction energy dissipation between the friction plate 2, the I-shaped steel plate 1 and the U-shaped steel plate 3 is used, while ensuring that other components of the damper are in the elastic state. At this time, it is in the first stage of energy dissipation. In the case of medium and large earthquakes, first, the friction energy dissipation between the friction plate 2, the I-shaped steel plate 1 and the U-shaped steel plate 3 is utilized. At this time, it is in the first stage of energy dissipation. When a certain displacement is reached, the steel plates at both ends of the friction plate 2 collide, and the friction energy dissipation stops. When the displacement continues to increase, it relies on the deformation energy dissipation of the first curved variable cross-section I-shaped energy dissipation element 41 and the second curved variable cross-section I-shaped energy dissipation element 42 to enter the second stage of energy dissipation. Among them, the friction plate 2 is provided with elongated holes. By adjusting the size of the elongated holes on the friction plate 2, the maximum displacement of the friction energy dissipation in the first stage can be changed; by adjusting the flange distance between the I-shaped steel plate 1 and the U-shaped steel plate 3, the maximum displacement of the friction energy dissipation in the first stage can be changed; by adjusting the linear shape of the first curved variable cross-section I-shaped energy dissipation element 41 and the second curved variable cross-section I-shaped energy dissipation element 42, the stiffness and energy dissipation capacity in and out of the plane can be adjusted. The bending moment of this damper gradually increases from the middle to both ends. The flange shape is determined by making the stress generated by the bending moment equal to the yield stress, ensuring that the flange can enter the yield state in the full cross-section during operation, and using this shape, the in-plane and out-of-plane stiffness of the damper can be flexibly designed, and the purpose of full cross-section yield of out-of-plane plastic deformation can be achieved, greatly improving the bidirectional energy dissipation capacity and ductility of the damper.

[0047] At the same time, all components of this damper are connected by fully bolted assembly, which is convenient for disassembly and assembly. Except for the first curved variable cross-section I-shaped energy dissipation element 41 and the second curved variable cross-section I-shaped energy dissipation element 42, the components can be reused after the earthquake, greatly shortening the maintenance time and quickly restoring the use function of the structure after the earthquake. In addition, for the connection setting of the damper, the bending-shear separation control is adopted, which can improve the stability of the damper and ensure the normal operation of the damper.

[0048] Example 2

[0049] See the appendix Figure 22 As shown in the figure, the prefabricated friction metal damper with both seismic monitoring and staged energy dissipation functions in the above Example 1 is installed between two shear walls 13 connected by a connecting beam 12. Among them, the concrete part of the shear wall 13 needs to pre-embed the embedded connecting piece 5 in the prefabricated friction metal damper with both seismic monitoring and staged energy dissipation functions in advance, and then assemble the remaining components. The damper is driven to work and dissipate energy by the inter-story displacement during an earthquake.

[0050] Example 3

[0051] See the appendix Figure 23, install the prefabricated friction metal damper with both seismic monitoring and staged energy dissipation functions in the above-mentioned Embodiment 1 between the upper frame beam 13 and the lower frame beam 15. Among them, the embedded connecting piece 5 at the lower end of the prefabricated friction metal damper with both seismic monitoring and staged energy dissipation functions is embedded in the concrete connecting pier 14 on the lower frame beam 15. The concrete connecting pier 14 and the lower frame beam 15 are integrally cast. The embedded connecting piece 5 at the upper end is embedded in the upper frame beam 13. The flange line shapes of the first curved variable cross-section I-shaped energy dissipation element 41 and the second curved variable cross-section I-shaped energy dissipation element 42 can also be changed according to requirements to adjust the out-of-plane stiffness and out-of-plane energy dissipation capacity.

[0052] Embodiment 4

[0053] See the appendix Figure 24 , install multiple prefabricated friction metal dampers with both seismic monitoring and staged energy dissipation functions in the above-mentioned Embodiment 1 between the upper frame beam 13 and the lower frame beam 15 in a side-by-side manner. The specific connection method is the same as that in the above-mentioned Embodiment 3 and will not be elaborated here. Thus, sufficient in-plane stiffness and yield bearing capacity are provided.

[0054] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, refer to the description in the method section.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembled friction metal damper with both seismic monitoring and staged energy dissipation functions, Characterized in that, It includes: An I-shaped steel plate (1), friction plates (2), U-shaped steel plates (3) and energy dissipation elements (4). The energy dissipation elements (4) include a first curved variable cross-section I-shaped energy dissipation element (41) and a second curved variable cross-section I-shaped energy dissipation element (42). One side of the I-shaped steel plate (1) is connected to the first curved variable cross-section I-shaped energy dissipation element (41) by bolts. There are two friction plates (2) and two U-shaped steel plates (3). The two U-shaped steel plates (3) are respectively arranged on both sides of the I-shaped steel plate (1). The two U-shaped steel plates (3) are connected to the I-shaped steel plate (1) by bolts to form an integral body. The friction plates (2) are clamped between the U-shaped steel plates (3) and the I-shaped steel plate (1). The two U-shaped steel plates (3) are also fixedly connected to the second curved variable cross-section I-shaped energy dissipation element (42) by bolts; Among them, in the case of small earthquakes, the friction between the friction plates and the I-shaped steel plate and the U-shaped steel plate is used for energy dissipation. At this time, it is in the first-stage energy dissipation. In the case of medium and large earthquakes, first, the friction between the friction plates and the I-shaped steel plate and the U-shaped steel plate is used for energy dissipation. At this time, it is in the first-stage energy dissipation. When a certain displacement is reached, the steel plates at both ends of the friction plates collide, and the friction energy dissipation stops. When the displacement continues to increase, it relies on the deformation energy dissipation of the first curved variable cross-section I-shaped energy dissipation element and the second curved variable cross-section I-shaped energy dissipation element to enter the second-stage energy dissipation; It also includes embedded connectors (5). There are two embedded connectors (5). The two embedded connectors (5) are respectively connected to the ends of the first curved variable cross-section I-shaped energy dissipation element (41) and the second curved variable cross-section I-shaped energy dissipation element (42) that are far away from the I-shaped steel plate (1); The embedded connector (5) includes a U-shaped connecting plate (51), a reinforcing plate (52) and an anchor (53). The anchor (53) is arranged on the back side of the opening direction of the U-shaped connecting plate (51). The reinforcing plate (52) is fixedly connected to the U-shaped connecting plate (51) and is on the same side as the anchor (53); Shear studs (6) and bending studs (7) are arranged on the reinforcing plate (52); It also includes a U-shaped support (8) and a shear plate (9). The U-shaped support (8) is used to connect the U-shaped connecting plate (51) and the energy dissipation element (4), and the shear plate (9) is used to connect the U-shaped support (8) and the energy dissipation element (4).

2. The assembled friction metal damper with both seismic monitoring and staged energy dissipation functions according to claim 1, Characterized in that, It also includes a strain sensor (10) and a terminal device. The strain sensor (10) is arranged on the first curved variable cross-section I-shaped energy dissipation element (41) to monitor strain data. The strain sensor (10) is electrically connected to the terminal device.

Images