Classified energy consumption detection method for combined buckling-restrained brace

Abstract

The invention relates to a graded energy consumption detection method for a combined buckling-restrained brace, and belongs to the civil engineering industry. The method is characterized in that a device comprises an actuator, a force sensor, a directional support, a cover plate, a core plate I, a core plate II, a core plate III, a base plate, a high-strength bolt, a strain gauge, a data line, a static strain test system, a computer, an end constraint and an outer frame. The loading device is an actuator, transmits a load to the outer frame through a directional support, and performs low-cycle reciprocating loading on the outer frame; a force sensor is arranged outside the actuator; a strain gauge is adhered to the core plate I; the first core plate, the second core plate, the third core plate, the cover plate and the base plate form the buckling-restrained brace device. The buckling-restrained brace device is fixed to the outer frame through end restraint. Aiming at the current situation that most buckling-restrained brace devices cannot meet graded energy consumption and are difficult to detect and replace after an earthquake occurs, the invention provides a combined type buckling-restrained brace graded energy consumption detection method, graded energy consumption and graded seismic energy dissipation can be realized, meanwhile, the detection process is simple and easy to operate, and the detection efficiency is high. And the first core plate, the second core plate and the third core plate of the buckling-restrained brace device can be conveniently detected and replaced in real time under the inconvenient conditions that the construction environment in a remote area is poor after a disaster.

Description

Technical Field

[0001] The invention patent of this application is a combined buckling-restrained brace grading energy dissipation detection method, belonging to the civil engineering industry Background Art

[0002] At present, earthquake disasters are still one of the most serious natural disasters. When an earthquake occurs, it causes very serious damage to building structures. Due to its excellent seismic energy dissipation performance, buckling-restrained braces are widely used in frame structures in high seismic intensity areas. Compared with ordinary braces, buckling-restrained braces have equivalent tensile and compressive properties, and their hysteretic curves are plump and stable. They can not only be used as structural members, but also be excellent dampers after yielding, capable of dissipating a large amount of earthquake input energy. However, the core materials of most buckling-restrained braces are single steel plates, and the energy they dissipate is limited. Moreover, in regions such as the northwest, due to frequent earthquake disasters and inconvenient construction conditions, it is difficult to detect the working performance of buckling-restrained braces after an earthquake Summary of the Invention

[0003] The invention patent of this application provides a combined buckling-restrained brace grading energy dissipation detection method for the above problems

[0004] The invention patent of this application adopts the following technical solutions

[0005] The combined buckling-restrained brace grading energy dissipation detection method described in the invention patent of this application, the device includes an actuator, a force sensor, a directional support, a cover plate, a core plate 1, a core plate 2, a core plate 3, a backing plate, high-strength bolts, strain gauges, data lines, a static strain test system, a computer, end constraints, and an outer frame. The loading device is an actuator, which transfers the load to the outer frame through the directional support for low-cycle reciprocating displacement loading of the outer frame; a force sensor is installed outside the actuator; strain gauges are pasted on the core plate 1; the core plate 1, the core plate 2, the core plate 3, the cover plate, and the backing plate form a buckling-restrained brace device; the buckling-restrained brace device is fixed to the outer frame through end constraints

[0006] The combined buckling-restrained brace grading energy dissipation detection method described in the invention patent of this application, the force sensor is provided with a through hole and is hollow inside, and it monitors the load applied by the actuator in real time

[0007] The combined buckling-restrained brace grading energy dissipation detection method described in the invention patent of this application, the force sensor is connected to the computer through a data line

[0008] The combined buckling-restrained brace grading energy dissipation detection method described in the invention patent of this application, the strain gauges are connected to the static strain test system through data lines, and the static strain test system then transfers the obtained data to the computer through data lines

[0009] For the combined buckling-restrained brace hierarchical energy dissipation detection method described in this invention patent, the first core plate, the second core plate, the third core plate, the cover plate, and the backing plate are connected by high-strength bolts, which facilitates the subsequent replacement of the core material.

[0010] For the combined buckling-restrained brace hierarchical energy dissipation detection method described in this invention patent, the first core plate, the second core plate, and the third core plate do not contact the cover plate and the backing plate, and the gap is 0.5 - 4 mm. Non-bonding material is filled in the middle to facilitate the buckling deformation of the core plate.

[0011] For the combined buckling-restrained brace hierarchical energy dissipation detection method described in this invention patent, the first core plate, the second core plate, and the third core plate are I-shaped steels, with the same size, shape, and cross-sectional area.

[0012] For the combined buckling-restrained brace hierarchical energy dissipation detection method described in this invention patent, the first core plate, the second core plate, and the third core plate are made of different yield point steels of the same material. The yield point of the first core plate is the lowest, the yield point of the second core plate is medium, and the yield point of the third core plate is the highest.

[0013] For the combined buckling-restrained brace hierarchical energy dissipation detection method described in this invention patent, the buckling-restrained brace device and the end constraint are connected by high-strength bolts.

[0014] For the combined buckling-restrained brace hierarchical energy dissipation detection method described in this invention patent, the yield point of the first core plate is the lowest. Therefore, the first core plate buckles first. At this time, the strain detected by the strain gauge is ε. The first core plate, the second core plate, and the third core plate are under the same force, so the strain of all is ε. Assuming the load generated by the actuator at this time is F, the calculation formula EA 1 ε + EA 2 ε + EA 3 ε = F. According to claim 7, the first core plate, the second core plate, and the third core plate have the same size, shape, and cross-sectional area. Therefore, the cross-sectional area A of the three core materials is equal, and it can be deduced that That is f y1 is the yield strength of the first core plate. So when the strain detected by the strain gauge After the earthquake, the device needs to be disassembled to replace the core plate.

[0015] Beneficial effects

[0016] Aiming at the current situation that most buckling-restrained brace devices cannot meet hierarchical energy dissipation and it is difficult to detect and replace the device after an earthquake, this invention patent provides a combined buckling-restrained brace hierarchical energy dissipation detection method, which can achieve hierarchical energy dissipation, greatly dissipate seismic energy, and at the same time, the detection process is simple and easy to operate, facilitating the detection and real-time replacement of the first core plate, the second core plate, and the third core plate of the buckling-restrained brace device under inconvenient conditions such as poor construction environments in remote areas after a disaster. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of this invention patent;

[0018] Figure 2 is a schematic diagram of the partial structure of this invention patent;

[0019] Figure 3 is an exploded view of the partial structure of this invention patent.

[0020] In the figure: 1 - actuator; 2 - force sensor; 3 - directional support; 4 - cover plate; 5 - first core plate; 6 - second core plate; 7 - third core plate; 8 - backing plate; 9 - high-strength bolt; 10 - strain gauge; 11 - data line; 12 - static strain test system; 13 - computer; 14 - end constraint; 15 - outer frame. Detailed Embodiment

[0021] To make the objectives and technical solutions of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0022] As Figure 1 shown: The combined buckling-restrained brace grading energy dissipation detection method, the device includes an actuator 1, a force sensor 2, a directional support 3, a cover plate 4, a first core plate 5, a second core plate 6, a third core plate 7, a backing plate 8, high-strength bolts 9, strain gauges 10, data lines 11, a static strain test system 12, a computer 13, an end constraint 14, and an outer frame 15. The loading device is the actuator 1, and the load is transmitted to the outer frame 15 through the directional support 3 for low-cycle reciprocating displacement loading of the outer frame 15; a force sensor 2 is installed outside the actuator 1; strain gauges 10 are pasted on the first core plate 5; the first core plate 5, the second core plate 6, the third core plate 7, the cover plate 4, and the backing plate 8 form a buckling-restrained brace device; the buckling-restrained brace device is fixed to the outer frame 15 through the end constraint 14.

[0023] The force sensor 2 is provided with a through hole and is hollow inside, and it monitors the load applied by the actuator 1 in real time. The force sensor 2 is connected to the computer 13 through the data line 11.

[0024] The strain gauges 10 are connected to the static strain test system 12 through the data line 11, and the static strain test system 12 then transmits the obtained data to the computer 13 through the data line 11.

[0025] The core plate 1, core plate 2, core plate 3, cover plate, and backing plate are connected by high-strength bolts, facilitating subsequent replacement of the core material.

[0026] The core plate 1, core plate 2, and core plate 3 are not in contact with the cover plate and the backing plate, with a gap of 0.5 - 4 mm, and non-bonding material is filled in the middle to facilitate buckling deformation of the core plates.

[0027] The core plate 1, core plate 2, and core plate 3 are I-shaped steels, with the same size, shape, and cross-sectional area.

[0028] The core plate 1, core plate 2, and core plate 3 are made of different yield point steels of the same material. The yield point of the core plate 1 is the lowest, the yield point of the core plate 2 is medium, and the yield point of the core plate 3 is the highest.

[0029] The buckling restraint brace device is connected to the end restraint by high-strength bolts.

[0030] Since the yield point of the core plate 1 is the lowest, the core plate 1 buckles first. At this time, the strain detected by the strain gauge is ε. The core plate 1, core plate 2, and core plate 3 are subjected to the same force, so the strain of all is ε. Assuming the load generated by the actuator 1 at this time is F, the calculation formula EA 1 ε + EA 2 ε + EA 3 ε = F. According to claim 7, the core plate 1, core plate 2, and core plate 3 have the same size, shape, and cross-sectional area. Therefore, the cross-sectional areas A of the three core materials are all equal, and it can be deduced that That is f y1 is the yield strength of the core plate 1. So when the strain detected by the strain gauge After the earthquake, the device needs to be disassembled to replace the core plate.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. Combined buckling-restrained brace grading energy dissipation detection method, Characterized in that: The device includes 1 - actuator; 2 - force sensor; 3 - directional support; 4 - cover plate; 5 - first core plate; 6 - second core plate; 7 - third core plate; 8 - backing plate; 9 - high-strength bolt; 10 - strain gauge; 11 - data line; 12 - static strain test system; 13 - computer; 14 - end constraint; 15 - outer frame. The loading device is an actuator, and the load is transmitted to the outer frame through the directional support to perform low-cycle reciprocating displacement loading on the outer frame; a force sensor is installed outside the actuator; strain gauges are pasted on the first core plate; the first core plate, the second core plate, the third core plate, the cover plate, and the backing plate form a buckling-restrained brace device; the buckling-restrained brace device is fixed on the outer frame through the end constraint.

2. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The force sensor is provided with a through hole and is hollow inside, and monitors the load applied by the actuator in real time.

3. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The force sensor is connected to the computer through a data line.

4. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The strain gauges are connected to the static strain test system through data lines, and the static strain test system then transmits the obtained data to the computer through the data lines.

5. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The first core plate, the second core plate, the third core plate, the cover plate, and the backing plate are connected by high-strength bolts, which is convenient for subsequent replacement of the core material.

6. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The first core plate, the second core plate, and the third core plate do not contact the cover plate and the backing plate, and the gap is 0.5 - 4 mm, and non-bonding material is filled in the middle to facilitate the buckling deformation of the core plate.

7. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The first core plate, the second core plate, and the third core plate are I-shaped steels, with the same size, shape, and cross-sectional area.

8. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The first core plate, the second core plate, and the third core plate are different yield point steels of the same material, and the yield point of the first core plate is the lowest, the yield point of the second core plate is medium, and the yield point of the third core plate is the highest.

9. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The buckling-restrained brace device and the end constraint are connected by high-strength bolts.

10. The combined buckling-restrained brace grading energy dissipation detection method according to claim 1, Characterized in that: The yield point of the first core plate is the lowest. Therefore, the first core plate buckles first. At this time, the strain detected by the strain gauge is ε. Since the first core plate, the second core plate, and the third core plate are subjected to the same force, the strain of each is ε. Assuming that the load generated by the actuator at this time is F, the calculation formula EA 1 ε + EA 2 ε + EA 3 ε = F. According to claim 7, the first core plate, the second core plate, and the third core plate have the same size and shape and equal cross-sectional areas. Therefore, the cross-sectional areas A of the three core materials are all equal, and it can be deduced that That is f y1 is the yield strength of the first core plate. So when the strain detected by the strain gauge is reached, after the earthquake ends, the device needs to be disassembled to replace the core plate.

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