Assembly type column foot of earthquake damage self-sensing replaceable lateral energy dissipation resisting device

Abstract

The utility model relates to an earthquake damage self-sensing assembly type column foot of a replaceable lateral energy consumption resisting device, a steel embedded part and a welding steel plate are arranged at the bottom of a prefabricated assembly column, the welding steel plate is arranged at the bottom of the steel embedded part, a bolt hole channel matched with the lateral energy consumption resisting device is arranged on the steel embedded part, and the bolt hole channel is connected with the prefabricated assembly column. One end of the lateral energy consumption resisting device is detachably and fixedly connected with the steel embedded part through a connecting piece, the concrete bottom beam is provided with an embedded part, the embedded part is provided with a long circular bolt hole matched with the lateral energy consumption resisting device, and the other side of the lateral energy consumption resisting device is detachably and fixedly connected with the embedded part through a connecting piece. And the self-resetting column base node is welded between the welding steel plate of the prefabricated assembly column and the embedded part of the concrete bottom beam. The utility model has the advantages that the node structure is simple, the cooperative work mechanism is clear, the prefabrication and generality degree is high, the building industrialization assembly efficiency is improved, and the industrial development trend of low carbon, green and assembly is met.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, specifically to a prefabricated column base with a self-sensing and replaceable anti-lateral energy dissipation device for vibration damage. Background Technology

[0002] With the increasing promotion of the concept of seismic resilience in recent years, the development of earthquake engineering research in my country has shown a trend from seismic resistance and seismic isolation to recoverable functions. Recoverable seismic-resistant structures refer to structures that can be restored to their usability after an earthquake with little or no repair. This concept was proposed by Lü Xilin et al., combining the functional roles of existing self-setting structures, swaying structures, and replaceable component structures. These structures are easy to construct and maintain, and have high cost-effectiveness throughout their life cycle. To achieve rapid recovery of structural function after an earthquake, current technologies mainly adopt the concepts of plastic damage control and swaying self-setting design. Research on recoverable column base joints has achieved certain results, but while ensuring the load-bearing capacity and energy dissipation capacity of the joints, it is impossible to effectively avoid plastic damage to the structural columns. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of the prior art by providing a prefabricated column base with a self-sensing and replaceable lateral energy dissipation device for seismic damage. It consists of a prefabricated joint area with a fully hinged bottom, a lateral energy dissipation device that can release internal forces through frictional sliding, and a group of high-strength bolts. While ensuring the seismic performance of the column base joint, it also has good seismic damage detection and post-earthquake repair capabilities. After an earthquake, the column base joint can be restored to normal use simply by replacing the lateral energy dissipation device.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A prefabricated column base with a self-sensing and replaceable lateral energy dissipation device for vibration damage includes a prefabricated column, a concrete base beam, a self-resetting column base node, and a lateral energy dissipation device. The self-resetting column base node is installed between the bottom of the prefabricated column and the top surface of the concrete base beam, and the lateral energy dissipation device is installed between the side of the prefabricated column and the top surface of the concrete base beam. The key feature is that a steel embedded part and a welded steel plate are provided at the bottom of the prefabricated column, with the welded steel plate positioned at the bottom of the steel embedded part. The embedded part is provided with bolt holes that match the lateral energy dissipation device. One end of the lateral energy dissipation device is detachably connected to the steel embedded part through a connector. The concrete bottom beam is provided with an embedded part, which is provided with an elongated oval bolt hole that matches the lateral energy dissipation device. The other side of the lateral energy dissipation device is detachably connected to the embedded part through a connector. The self-resetting column base node is welded between the welded steel plate of the precast assembled column and the embedded part of the concrete bottom beam.

[0006] The precast assembled column includes a precast concrete column and a steel embedded part, wherein the steel embedded part is welded to the reinforcing steel of the precast concrete column.

[0007] The welded steel plate has holes for connecting the self-resetting column foot nodes.

[0008] The embedded part is welded to the reinforcing steel of the concrete bottom beam.

[0009] The embedded part has holes for connecting the self-resetting column foot node.

[0010] The self-resetting column base node includes two pairs of sliding hinge connecting plates, three rolling hinge connecting plates, one rolling hinge roller, and four pairs of self-resetting devices. The two pairs of sliding hinge connecting plates are arranged on both sides of the three rolling hinge connecting plates. Each pair of sliding hinge connecting plates includes an upper convex connecting plate and a lower concave connecting plate. The upper convex connecting plate is connected to the welded steel plate, and the lower concave connecting plate is connected to the embedded part. The three rolling hinge connecting plates are connected by the rolling hinge roller. The middle rolling hinge connecting plate is connected to the welded steel plate, and the two rolling hinge connecting plates on both sides are connected to the embedded part. The two ends of the four pairs of self-resetting devices are respectively connected to the welded steel plate and the embedded part.

[0011] The self-resetting device includes a prestressed cable, a shape memory alloy induction cylinder, and an annular cup-shaped reset plate. The two ends of the prestressed cable are respectively anchored to the welded steel plate and the embedded part. The shape memory alloy induction cylinder is sleeved around the prestressed cable, and a plurality of annular cup-shaped reset plates are sleeved on the outer sleeve of the shape memory alloy induction cylinder along the height direction.

[0012] The lateral energy dissipation device includes a connecting steel beam, a lateral energy dissipation element, and a group of high-strength bolts. The connecting steel beam is located on top of the lateral energy dissipation element, and the end of the connecting steel beam is connected to the steel embedded part through the group of high-strength bolts. The bottom of the lateral energy dissipation element is connected to the embedded part through the group of high-strength bolts.

[0013] The connecting steel beam is an I-beam or a square box beam with stiffening webs, and its flanges are welded to the lateral energy dissipation elements, forming an inverted L shape.

[0014] The energy-consuming element is formed by welding multiple rear steel plates together using a drop plate.

[0015] A method for assembling and replacing a prefabricated column base involving the aforementioned self-sensing and replaceable lateral energy dissipation device for seismic damage includes the following steps:

[0016] The assembly method is as follows: steel embedded parts are set in the precast concrete column, embedded parts are set in the concrete bottom beam, the steel embedded parts and the embedded parts are welded to the corresponding tied steel bars respectively, and the accessories required for the self-resetting column foot node and the replaceable lateral energy dissipation device are made, and the ducts and pre-welding positions are preset.

[0017] Weld the sliding hinge connecting plate and the rolling hinge connecting plate to the corresponding steel embedded parts and embedded parts, and weld the connecting steel beam and the anti-lateral energy dissipation element to form an L-shaped device.

[0018] The splicing connection plates are connected by rolling hinge rollers to complete the initial connection between the precast assembled column and the concrete bottom beam;

[0019] The prestressed cables are fixed and anchored to the steel embedded parts and the embedded parts. At the same time, the steel embedded parts and the connecting steel beam connecting plate are connected with a group of high-strength bolts. The lateral energy dissipation elements and the embedded parts are connected with a group of high-strength bolts, and the whole node is assembled.

[0020] The replacement method is as follows: If the shape memory alloy induction cylinder detects significant damage to the anti-lateral energy dissipation device, the anti-lateral energy dissipation device and high-strength bolts at the column base of the post-earthquake block need to be replaced to restore the functionality of the node.

[0021] The advantages of this utility model are: simple node structure, clear collaborative working mechanism, high degree of prefabrication and versatility, improved assembly efficiency of industrialized building, and in line with the industry development trend of "low-carbon, green, and prefabricated". It has good load-bearing capacity and energy consumption capacity, and features intelligent damage detection and control, rapid repair of post-earthquake damage. All structural components can be quickly disassembled and reinstalled for repair after damage, thus realizing the development concept of self-resetting and repairable structures. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the prefabricated assembly column in this utility model;

[0024] Figure 3 This is a schematic diagram of the concrete bottom beam in this utility model;

[0025] Figure 4 This is a schematic diagram of the self-resetting column foot node in this utility model;

[0026] Figure 5 This is a schematic diagram of the replaceable anti-side energy dissipation device in this utility model. Detailed Implementation

[0027] The features of this utility model and other related features will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0028] like Figure 1-5 As shown in the figure, each label represents:

[0029] 100 precast assembled columns, 200 concrete bottom beams, 300 self-resetting column base nodes, and 400 replaceable lateral energy dissipation devices;

[0030] 101 Precast concrete column, 102 welded steel plate, 103 steel embedded part, 104 bolt hole;

[0031] Concrete bottom beam body 201, embedded part 202, oblong bolt hole 203;

[0032] Sliding hinge connecting plate 301, sliding hinge connecting plate 302, rolling hinge connecting plate 303, rolling hinge roller 304, self-resetting device 305, prestressed cable 3501, shape memory alloy induction cylinder 3052, and reset assembly 3053;

[0033] Connecting steel beam 401, lateral energy dissipation element 402, high-strength bolt group 403, high-strength bolt group 404.

[0034] Example: Figure 1 As shown, the prefabricated column base with self-sensing and replaceable lateral energy dissipation device in this embodiment includes a prefabricated column 100, a concrete bottom beam 200, a self-resetting column base node 300, and a replaceable lateral energy dissipation device 400.

[0035] like Figure 2 As shown, the precast assembled column 100 is provided with a welded steel plate 102 adapted to the self-resetting column base node 300, and a steel embedded part 103 matched with the replaceable lateral energy dissipation device 400. The concrete bottom beam 200 is provided with embedded parts 202 matched with the self-resetting column base node 300 and the replaceable lateral energy dissipation device.

[0036] The precast assembled column 100 includes a precast concrete column 101, a welded steel plate 102, and a steel embedded part 103. The steel embedded part 103 is welded to the reinforcing steel of the precast concrete column 101 and placed around the base of the precast concrete column 101. Bolt holes 104 for connecting to a replaceable lateral energy dissipation device 400 are provided on the steel embedded part 103, arranged in an array of circular holes. Both sides of the steel embedded part 102 are connected to the connecting steel beam 401 of the replaceable lateral energy dissipation device via high-strength bolts. The high-strength bolts preferably have a strength of 10.9 or 12.9. The steel embedded part 103 is preferably made of Q335 or 45# steel, and the concrete is selected from C30 or C40. The welded steel plate 102 is welded to the bottom of the steel embedded part 103, and holes for connecting a self-resetting device 305 are provided at the four corners of the welded steel plate 102.

[0037] like Figure 3 As shown, the concrete bottom beam 200 includes a concrete bottom beam body 201 and embedded parts 202, wherein the embedded parts 202 are welded to the reinforcing bars of the concrete bottom beam body 201 and placed on top of the concrete bottom beam body 201. The embedded parts are preferably made of Q335 steel or 45# steel, and the concrete is preferably C30 or C40.

[0038] The embedded part 202 has several elongated oval bolt holes 203 arranged in an array. The embedded part 202 is connected to the lateral energy dissipation element 402 of the replaceable lateral energy dissipation device 4000 by high-strength bolts. The upper part of the embedded part 202 has a position for welding the self-resetting column foot node 300 connecting plate, and has holes for connecting the self-resetting device 305.

[0039] like Figure 4 As shown, the self-resetting column base node 300 includes two pairs of sliding hinge connecting plates, including sliding hinge connecting plate 301 and sliding hinge connecting plate 302, three rolling hinge connecting plates 303, one rolling hinge roller 304, and four pairs of self-resetting devices 305. The sliding hinge connecting plates 301 and 302 are respectively positioned on both sides of the three rolling hinge connecting plates 303. The two pairs of sliding hinge connecting plates are upper convex connecting plates and lower concave connecting plates. The upper convex connecting plate is welded to the steel embedded part 102, and the lower concave connecting plate is welded to the steel embedded part 202. Three rolling hinge connecting plates 303 are arranged in close fit. One upper rolling hinge connecting plate is welded to the steel embedded part 102, and the other two lower rolling hinge connecting plates are welded to the embedded part 202. The three rolling hinge connecting plates 303 are connected by rolling hinge rollers 304. The two ends of the four pairs of self-resetting devices 305 are respectively connected to the reserved holes of the steel embedded part 102 and the embedded part 202.

[0040] The four pairs of self-resetting devices 305 have identical structures, each including a prestressed cable 3051, a shape memory alloy induction cylinder 3052, and several annular cup-shaped reset plates 3053. The two ends of the prestressed cable 3051 are fixedly anchored to steel embedded parts 102 and 202 respectively, and are externally mounted with shape memory alloy induction cylinders 3052. Each shape memory alloy induction cylinder 3052 has several annular cup-shaped reset plates 3053 stacked sequentially from bottom to top, with their openings facing each other and fastening to the outside of the shape memory alloy induction cylinder 3052. The shape memory alloy induction cylinder 3052 can detect the displacement angle of the column base node and provide early warning of the danger level during column base assembly.

[0041] In this embodiment, the prestressed cable 3051 is preferably an OVM15-2 epoxy-coated external prestressed cable or an unbonded prestressed cable. The shape memory alloy induction cylinder 3052 is preferably a nickel-titanium shape memory alloy or a titanium-nickel-niobium shape memory alloy. The annular cup-type reset piece 3053 is preferably nitrile rubber or acrylic rubber.

[0042] In this embodiment, the upper convex connecting plate is relatively smaller in width than the lower concave connecting plate.

[0043] like Figure 5 As shown, the replaceable lateral energy dissipation device 400 includes a connecting steel beam 401, a lateral energy dissipation element 402, and high-strength bolt groups 403 and 404. The connecting steel beam 401 is welded to the lateral energy dissipation element 402, forming an inverted L-shape. The lateral energy dissipation element 402 is connected to the elongated bolt holes 203 in the embedded part 202 via the high-strength bolt groups 403.

[0044] The end of the connecting steel beam 401 is provided with a connecting plate and connected to the steel embedded part 102 by a group of high-strength bolts 404. The connecting steel beam 401 is preferably an I-beam with stiffened web, and its flange is welded to the lateral energy dissipation element 402. The lateral energy dissipation element 402 is made of multiple rear steel plates welded together by a drop plate, and its effect is comparable to that of a displacement-related damper. The group of high-strength bolts 403 is pre-placed in the embedded part 202 and connected to the lateral energy dissipation element 402 and the embedded part 202 by nuts. The preferred strength grade of the high-strength bolts is 10.9, and the strength grade and the number of bolts are related to the pre-shear force of the assembled column.

[0045] In practice, this embodiment includes the following assembly and replacement methods:

[0046] The assembly method is as follows: steel embedded parts 103 are set in the precast concrete column 101, and embedded parts 202 are set in the concrete bottom beam body 201. The steel embedded parts 103 and embedded parts 202 are welded to the corresponding tied steel bars respectively. The necessary accessories for the self-resetting column foot node 300 and the replaceable lateral energy dissipation device 400 are made, and the holes and pre-welding positions are preset.

[0047] The sliding hinge connecting plate 301, the sliding hinge connecting plate 302 and the rolling hinge connecting plate 303 are respectively welded to the corresponding steel embedded parts 103 and 202, and the connecting steel beam 401 and the anti-lateral energy dissipation element 402 are welded to form an L-shaped device.

[0048] The rolling hinge connecting plates 303 are spliced ​​together, and the rolling hinge rollers 304 are used to connect each rolling hinge connecting plate 303 to complete the initial connection between the precast assembled column 100 and the concrete bottom beam 200.

[0049] The prestressed cable 3501 is fixedly anchored to the steel embedded part 103 and embedded part 202. At the same time, the steel embedded part 103 and the connecting plate of the connecting steel beam 401 are connected by a group of high-strength bolts 404. The lateral energy dissipation element 402 and the embedded part 202 are connected by a group of high-strength bolts 403. The whole node is assembled.

[0050] The replacement method is as follows: If the shape memory alloy induction cylinder 3052 detects that the anti-lateral energy dissipation element 402 has been significantly damaged, and the post-earthquake block needs to be replaced, the anti-lateral energy dissipation device 400 and high-strength bolts can be replaced to restore the functionality of the node.

[0051] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A prefabricated column base with a self-sensing and replaceable lateral energy dissipation device, comprising a prefabricated column, a concrete base beam, a self-resetting column base node, and a lateral energy dissipation device, wherein the self-resetting column base node is installed between the bottom of the prefabricated column and the top surface of the concrete base beam, and the lateral energy dissipation device is installed between the side of the prefabricated column and the top surface of the concrete base beam, characterized in that: A steel embedded part and a welded steel plate are provided at the bottom of the precast assembled column. The welded steel plate is located at the bottom of the steel embedded part. The steel embedded part is provided with bolt holes that match the lateral energy dissipation device. One end of the lateral energy dissipation device is detachably connected to the steel embedded part through a connector. The concrete bottom beam is provided with an embedded part, which is provided with an elongated oval bolt hole that matches the lateral energy dissipation device. The other side of the lateral energy dissipation device is detachably connected to the embedded part through a connector. The self-resetting column base node is welded between the welded steel plate of the precast assembled column and the embedded part of the concrete bottom beam.

2. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 1, characterized in that: The precast assembled column includes a precast concrete column and a steel embedded part, wherein the steel embedded part is welded to the reinforcing steel of the precast concrete column.

3. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 1, characterized in that: The welded steel plate has holes for connecting the self-resetting column foot nodes.

4. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 1, characterized in that: The embedded part is welded to the reinforcing steel of the concrete bottom beam.

5. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 1, characterized in that: The embedded part has holes for connecting the self-resetting column foot node.

6. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 1, characterized in that: The self-resetting column base node includes two pairs of sliding hinge connecting plates, three rolling hinge connecting plates, one rolling hinge roller, and four pairs of self-resetting devices. The two pairs of sliding hinge connecting plates are arranged on both sides of the three rolling hinge connecting plates. Each pair of sliding hinge connecting plates includes an upper convex connecting plate and a lower concave connecting plate. The upper convex connecting plate is connected to the welded steel plate, and the lower concave connecting plate is connected to the embedded part. The three rolling hinge connecting plates are connected by the rolling hinge roller. The middle rolling hinge connecting plate is connected to the welded steel plate, and the two rolling hinge connecting plates on both sides are connected to the embedded part. The two ends of the four pairs of self-resetting devices are respectively connected to the welded steel plate and the embedded part.

7. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 6, characterized in that: The self-resetting device includes a prestressed cable, a shape memory alloy induction cylinder, and an annular cup-shaped reset plate. The two ends of the prestressed cable are respectively anchored to the welded steel plate and the embedded part. The shape memory alloy induction cylinder is sleeved around the prestressed cable, and a plurality of annular cup-shaped reset plates are sleeved on the outer sleeve of the shape memory alloy induction cylinder along the height direction.

8. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 1, characterized in that: The lateral energy dissipation device includes a connecting steel beam, a lateral energy dissipation element, and a group of high-strength bolts. The connecting steel beam is located on top of the lateral energy dissipation element, and the end of the connecting steel beam is connected to the steel embedded part through the group of high-strength bolts. The bottom of the lateral energy dissipation element is connected to the embedded part through the group of high-strength bolts.

9. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 8, characterized in that: The connecting steel beam is an I-beam or a square box beam with stiffening webs, and its flanges are welded to the lateral energy dissipation elements, forming an inverted L shape.

10. The prefabricated column base with a self-sensing and replaceable lateral energy dissipation device according to claim 8, characterized in that: The energy-consuming element is formed by welding multiple rear steel plates together using a drop plate.

Images