Existing structure anti-seismic reinforcing device with replaceable core material BRB

Abstract

The utility model relates to the technical field of building structure reinforcement, in particular to an existing structure anti-seismic reinforcement device with a replaceable core material BRB, which comprises a replaceable energy consumption core material, longitudinal stiffening ribs, end plates, buckling constraint angle steel, anchor bolts, lateral end plates and hinge joints, the longitudinal stiffening ribs are arranged on two sides of a non-yield section of the replaceable energy consumption core material in pairs, and the longitudinal stiffening ribs are arranged on two sides of the non-yield section of the replaceable energy consumption core material in pairs. Buckling restraining angle steel is arranged on the upper portion and the lower portion of the replaceable energy dissipation core material in pairs, the buckling restraining angle steel and the replaceable energy dissipation core material are connected through anchor bolts, the lateral end plates are arranged at the end portions of the side faces between the upper buckling restraining angle steel and the lower buckling restraining angle steel on the same side, and the end plates are arranged at the two ends of the replaceable energy dissipation core material and connected with hinge joints through anchor bolts. The utility model has the advantages that the designed external constraint component is in bolt anchoring connection, is simple and convenient to disassemble, can be recycled, meets the requirements of double-carbon strategic development, and has remarkable advantages in the aspects of real-time monitoring, installation adaptability, precision, reliability and the like.

Description

Technical Field

[0001] This utility model relates to the field of building structure reinforcement technology, specifically to an existing structure seismic reinforcement device with replaceable core material BRB. Background Technology

[0002] Buckling-restrained braces (BRBs), also known as buckling-restrained energy dissipation braces, are seismic energy dissipation devices that combine the functions of a brace and an energy dissipation damper. A BRB mainly consists of three parts: an energy-dissipating core material, units that restrain the buckling of the core material, and unbonded filler material between the two. Installed in building structures, a BRB serves a dual function of load bearing under normal conditions and energy dissipation during earthquakes. By using restraining materials to increase the stiffness of the core material, BRBs prevent buckling under compression, ensuring a stable hysteresis curve. They yield under both tension and compression, exhibiting excellent hysteresis performance and a defined yield bearing capacity. BRBs avoid the significant difference in tensile and compressive bearing capacity inherent in ordinary braces, while also possessing the energy dissipation capabilities of a metallic damper, acting as a "fuse" within the structure and keeping the main structure within its elastic range. Therefore, the application of BRBs can comprehensively improve the seismic performance of traditional braced frames.

[0003] Existing buckling-restrained braces (BRBs) often suffer from two main problems: First, conventional external restraint components of buckling-restrained energy dissipation braces (BRBs) are steel sleeves or concrete. After a major earthquake, the energy dissipation core material fails, and the outer steel sleeve and the concrete or mortar poured inside are difficult to disassemble and replace. Furthermore, they are often considered disposable components, failing to meet the "dual-carbon" strategic development requirements of energy conservation, environmental protection, low carbon, and green development. Second, the actual working condition of the energy dissipation core material in existing BRBs is difficult to visually assess under small, moderate, and large earthquakes, posing challenges for subsequent maintenance and upkeep. Existing BRBs cannot simultaneously address both of these issues. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing an existing structural seismic reinforcement device with replaceable BRB core material.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A seismic reinforcement device for existing structures with replaceable core material (BRB) is characterized by comprising a replaceable energy-dissipating core material, longitudinal stiffeners, end plates, buckling restraint angle steels, anchor bolts, lateral end plates, and hinge nodes. The longitudinal stiffeners are arranged in pairs on both sides of the non-yielding section of the replaceable energy-dissipating core material. The buckling restraint angle steels are arranged in pairs on the upper and lower sides of the replaceable energy-dissipating core material, and the buckling restraint angle steels are connected to the replaceable energy-dissipating core material via the anchor bolts. The lateral end plates are located at the side ends between the upper and lower buckling restraint angle steels on the same side. The end plates are located at both ends of the replaceable energy-dissipating core material, and the end plates are connected to the hinge nodes via anchor bolts.

[0007] By arranging longitudinal stiffening ribs in pairs on both sides of the non-yield section of the replaceable energy-dissipating core material, the stress concentration of the replaceable energy-dissipating core material under load is reduced, the force performance of the connection between the end of the replaceable energy-dissipating core material and the hinge node is improved, and the fastening effect is played, effectively reducing the deformation and vibration of the replaceable energy-dissipating core material in the non-yield section.

[0008] By using buckling restraint angle steels on the upper and lower parts of the replaceable energy-dissipating core material and connecting them with anchor bolts, it is easy to disassemble and replace the replaceable energy-dissipating core material after it is damaged. It also facilitates the maintenance and upkeep of the buckling restraint support in the later stages. The stiffness and preload of the buckling restraint angle steel connection can be precisely controlled by the tightening torque of the anchor bolts to ensure the reliability of the connection. The anchor bolts do not require high-temperature welding and will not generate heat effects, so the replaceable energy-dissipating core material will not have welding stress, deformation, or welding defects.

[0009] A data monitoring system is installed at the top of the joint between the buckling restrained angle steel.

[0010] By installing a data monitoring system in the buckling-restrained angle steel gap, the system monitors the performance parameters of the replaceable energy-dissipating core material, such as deformation, horizontal and vertical displacement, strain, vibration frequency, and temperature. Combined with a signal acquisition module, the system transmits the monitoring data in real time, thereby monitoring the impact of seismic loads on the replaceable energy-dissipating core material and determining its actual working status.

[0011] The longitudinal stiffening ribs are disposed in the gaps of the buckling restraint angle steel.

[0012] The surface of the replaceable energy-dissipating core material is provided with a non-adhesive anti-rust coating, which is located between the replaceable energy-dissipating core material and the buckling restraint angle steel.

[0013] By attaching an adhesive anti-rust coating to the surface of the replaceable energy-dissipating core material between the replaceable energy-dissipating core material and the buckling restraint angle steel, the friction between the replaceable energy-dissipating core material and the buckling restraint angle steel can be reduced, ensuring that the replaceable energy-dissipating core material can yield and deform normally under load.

[0014] The lateral end plate is fixed to the side end between the upper and lower buckling restraint angle steels on the same side by the anchor bolts.

[0015] Lateral end plates are installed on both sides of the replaceable energy-dissipating core material and connected by anchor bolts to ensure that a fixed constraint gap is formed between the replaceable energy-dissipating core material and the buckling restraint angle steel, so that the replaceable energy-dissipating core material can yield and dissipate energy when subjected to stress and deformation.

[0016] The advantages of this utility model are: the designed external constraint component is bolted and anchored, which is simple and convenient to disassemble and can be recycled, meeting the requirements of the "dual carbon" strategic development; the designed data monitoring system has significant advantages in real-time monitoring, installation adaptability, accuracy and reliability, thanks to its high-precision monitoring capabilities, flexible installation design, real-time data transmission, environmental adaptability and multi-dimensional data analysis functions, providing comprehensive support for the safety assessment, early warning and post-disaster analysis of BRB under seismic loads. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front view of the present invention;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a detailed structural diagram of the present invention. Detailed Implementation

[0021] The features and other related features of this utility model 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:

[0022] like Figure 1-4 As shown in the figure, numbers 1-9 represent: 1. Replaceable energy-consuming core material, 2. Unbonded anti-rust coating, 3. Longitudinal stiffening rib, 4. End plate, 5. Buckling restraint angle steel, 6. Anchor bolt, 7. Lateral end plate, 8. Data monitoring system, 9. Hinge node.

[0023] Example: Figures 1 to 4 As shown, the existing structure seismic reinforcement device with replaceable core material BRB in this embodiment includes replaceable energy-dissipating core material 1. The replaceable energy-dissipating core material 1 is the core load-bearing component and adopts conventional Q235 core material, which is divided into yielding section and non-yielding section.

[0024] Longitudinal stiffening ribs 3 are configured on both sides of the non-yield section of the replaceable energy-consuming core material 1 by shielded metal arc welding. This reduces the stress concentration of the replaceable energy-consuming core material 1 under load, improves the force-bearing performance at the connection between the end of the replaceable energy-consuming core material 1 and the hinge node 9, plays a fastening role, and effectively reduces the deformation and vibration of the replaceable energy-consuming core material 1 in the non-yield section.

[0025] In this embodiment, the replaceable energy-dissipating core material 1 has a "straight" cross-section. Buckling restraint angle steels 5 are installed on both sides of the cross-section using shielded metal arc welding. Short stiffening ribs are provided laterally on the buckling restraint angle steels 5 to ensure a certain degree of stability. Lateral end plates 7, also made of Q235 steel, are installed on both sides of the replaceable energy-dissipating core material 1. The replaceable energy-dissipating core material 1, the lateral end plates 7, and the buckling restraint angle steels 5 are connected by anchor bolts 6 with a bolt hole diameter of 24mm. The design of the anchor bolts 6 allows for easy disassembly and replacement of the replaceable energy-dissipating core material 1 after damage, and facilitates subsequent maintenance and upkeep of the buckling restraint support. Furthermore, the tightening torque of the anchor bolts 6 allows for precise control of the stiffness and preload of the buckling restraint angle steel 5 connection, ensuring the reliability of the connection. In addition, the connection method using anchor bolts 6 does not require high-temperature welding and will not generate heat effects. This ensures that the replaceable energy-dissipating core material 1 will not have welding stress, deformation, or welding defects, and ensures that a 5mm constraint gap is formed between the replaceable energy-dissipating core material 1 and the buckling restraint angle steel 5, so that the replaceable energy-dissipating core material 1 can yield and dissipate energy when subjected to stress and deformation.

[0026] A non-adhesive anti-rust coating 2 is applied to the surface of the replaceable energy-dissipating core material 1. This non-adhesive anti-rust coating 2 is a non-absorbent polytetrafluoroethylene coating, which can effectively prevent corrosion of the replaceable energy-dissipating core material 1. The application range of the non-adhesive anti-rust coating 2 covers the area between the replaceable energy-dissipating core material 1 and the buckling restraint angle steel 5, which can reduce the friction between the replaceable energy-dissipating core material 1 and the buckling restraint angle steel 5, and ensure that the replaceable energy-dissipating core material 1 can yield and deform normally under load.

[0027] A data monitoring system 8 is installed in the gap of the buckling-restrained angle steel 5. This system 8 can consist of miniature monitoring devices, such as spot-welded strain gauges, miniature accelerometers, and temperature sensors, as well as a data acquisition and transmission module. Before installation, the performance of the spot-welded strain gauges, accelerometers, and temperature sensors is checked to ensure they are functioning correctly. Dust and impurities are cleaned from the steel structure surface and the 5mm gap to ensure the sensors adhere to the surface. The spot-welded strain gauges are welded onto the surface of the replaceable energy-dissipating core material 1, ensuring the sensor's slide rod direction is aligned with the measurement direction. The MEMS sensor and temperature sensor are fixed to the surface of the replaceable energy-dissipating core material 1 with strong adhesive, and a locking device is used to prevent loosening, ensuring good contact with the structure and facilitating real-time sensing of temperature changes in the replaceable energy-dissipating core material 1. Each sensor is connected to the data acquisition module, ensuring a stable connection between the module and the sensors. The data acquisition module is then placed in a protective box to avoid interference from dust and vibration. Connect the power supply and run the data monitoring system. Check whether the data output of each sensor is normal. Perform preliminary calibration on the displacement, strain, acceleration and temperature data to ensure the accuracy of the monitoring data.

[0028] When using data monitoring system 8 for monitoring:

[0029] Regular maintenance: A comprehensive inspection should be conducted every 6 months to ensure stable system operation and avoid sudden failures affecting the accuracy of monitoring data, especially before periods of high seismic activity, to ensure stable equipment performance; After an earthquake or strong vibration: A comprehensive inspection of the monitoring system should be conducted immediately within 1-2 weeks after the earthquake to check the working status of the sensors and investigate the causes of abnormal displacement and strain data; The sensor system should be calibrated every 1-2 years to ensure measurement accuracy, especially for sensors that may experience data drift due to long-term use (such as strain gauges).

[0030] Maintenance and Care Methods: Check the adhesion of strain gauges, observing for any peeling or loosening, especially after exposure to high temperatures or humidity. Recalibrate strain gauges and check if their resistance values ​​meet standards. If any abnormalities are found, replace the strain gauges immediately. Clean the surface of the accelerometer and check for loose contact points between the sensor and the replaceable energy-consuming core material 1. Calibrate the sensor using a vibration generator or standard accelerometer to ensure its sensitivity and range meet monitoring requirements. Check the adhesion between the temperature sensor and the steel component surface for good adhesion and for any oxidation or corrosion. Low temperatures may cause adhesive failure; use a temperature calibration instrument to ensure accurate readings. Data Acquisition and Transmission Module Maintenance: Check Connection Cables: Ensure the connection cables are secure during each maintenance check, checking for aging, breakage, or other problems. Replace damaged cables if necessary. Battery or Power Supply: If the system is equipped with a battery power supply, check the battery level regularly and replace it promptly when low to prevent power outages. Wireless Signal Testing: For systems using wireless data transmission modules, regularly check the strength and stability of the transmission signal to prevent data loss or transmission delays due to signal problems. System Cleaning: Regularly clean the surfaces of sensors and equipment, especially at monitoring points exposed to the elements, to prevent dust, oil, or moisture from affecting normal operation. Regularly spray dust repellent on areas prone to dust accumulation, and add protective covers to the monitoring system when necessary to improve its environmental tolerance. Through these regular maintenance and post-event inspections, the data monitoring system can maintain efficient operation, ensuring accurate recording of the dynamic performance of replaceable energy-consuming core material 1 during earthquakes, providing effective data support.

[0031] 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 device for seismic retrofitting of an existing structure with a replaceable core BRB, characterized by: The application relates to a replaceable energy dissipation core material, longitudinal stiffening ribs, end plates, buckling-restrained angle steels, anchoring bolts, lateral end plates and hinge joints, wherein the replaceable energy dissipation core material is provided with pairs of longitudinal stiffening ribs on both sides of the non-yielding section of the replaceable energy dissipation core material, the replaceable energy dissipation core material is provided with pairs of buckling-restrained angle steels on the upper and lower sides of the replaceable energy dissipation core material, the buckling-restrained angle steels are connected with the replaceable energy dissipation core material through the anchoring bolts, the lateral end plates are arranged at the lateral end portions between the upper and lower buckling-restrained angle steels on the same side, the replaceable energy dissipation core material is provided with the end plates at both ends, and the end plates are connected with the hinge joints through the anchoring bolts.

2. A device for seismic retrofitting of existing structures with replaceable core material BRBs according to claim 1, characterized in that: A data monitoring system is arranged at the top of the joint between the buckling-restrained angle steels.

3. A device for seismic retrofitting of existing structures with replaceable core material BRBs according to claim 1, characterized in that: The longitudinal stiffening ribs are arranged between the buckling-restrained angle steels.

4. A device for seismic retrofitting of existing structures with replaceable core material BRBs according to claim 1, characterized in that: A non-bonding rust-proof coating is arranged on the surface of the replaceable energy dissipation core material, and the non-bonding rust-proof coating is arranged between the replaceable energy dissipation core material and the buckling-restrained angle steels.

5. A device for seismic retrofitting of existing structures with replaceable core material BRBs according to claim 1, characterized in that: The lateral end plates are fixed at the lateral end portions between the upper and lower buckling-restrained angle steels on the same side through the anchoring bolts.

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