Buckling restraint support device and installation method thereof

Abstract

The present invention relates to the technical field of steel structure construction application, and in particular to a buckling restraint support device and an installation method thereof, the method comprising determining a connection method between a connecting component of a buckling restraint support device and a building to be installed based on an average earthquake intensity and an earthquake frequency in an area where the building to be installed is located within a preset time period; determining a priority fastening area based on a sensor installation area in the connecting component of the buckling restraint support device and a structural deformation sensitive area in the connecting component of the buckling restraint support device; determining a fastening sequence of bolts based on whether a three-dimensional shape of the priority fastening area is a regular three-dimensional shape; determining whether to adjust the installation process based on whether the buckling restraint support device is damaged after the simulation is completed and the proportion of the number of damaged buckling restraint support devices; the present invention improves the installation efficiency and service life of the buckling restraint support device by improving the accuracy of the analysis of the fastening method of the buckling restraint support device during the installation process.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure construction applications, and in particular to a buckling restraint support device and an installation method thereof. Background Art

[0002] In today's society, with the acceleration of urbanization and the continuous development of construction technology, various high-rise buildings, large public buildings and important infrastructure such as hospitals, schools, nuclear power plants, etc. are constantly emerging. These buildings face various threats from the natural environment during use. Among them, earthquakes are one of the most serious disasters affecting the safety of building structures. Many strong earthquakes in history have caused huge losses to human life and property. Therefore, improving the seismic performance of buildings has become a focus of common concern in the engineering and academic circles. Buckling restrained brace devices, as an effective seismic structural component, can consume energy through their own deformation under the action of earthquakes, thereby reducing the seismic response of the building structure and protecting the safety of the main structure of the building. However, the characteristics of seismic activity in different regions vary greatly, and the average intensity and frequency of earthquakes are different. This requires that when installing buckling restrained brace devices, it is necessary to select appropriate connection methods and installation methods according to the specific seismic environment to ensure that the device can play the greatest seismic effect in actual earthquakes.

[0003] Chinese patent application publication number: CN118029575A discloses an anti-buckling brace device, which is a double-core buckling restraint brace with good supporting effect and is not prone to instability. The anti-buckling brace device includes two anti-buckling restraint brace units, and the anti-buckling restraint brace units include: an external restraint member and an energy absorbing component, the energy absorbing component is arranged in the external restraint member, the middle section of the energy absorbing component is corrugated, and the two ends of the energy absorbing component are suitable for connecting to a building. The two external restraint members of the two anti-buckling restraint brace units are arranged in a direction perpendicular to the length of any external restraint member and are connected to each other. The invention solves the problem that the anti-buckling brace device in the prior art is greatly affected by the initial defects of the steel, has a poor supporting effect, and is prone to instability.

[0004] It can be seen that the prior art has the problem of inaccurate analysis of the connection method during the installation of the buckling restraint support device, resulting in low installation efficiency and short service life of the buckling restraint support device. Summary of the invention

[0005] To this end, the present invention provides a buckling restraint support device and an installation method thereof, so as to overcome the problem in the prior art that the connection method analysis during the installation of the buckling restraint support device is not accurate enough, resulting in low installation efficiency and short service life of the buckling restraint support device.

[0006] To achieve the above object, the present invention provides a method for installing a buckling restrained support device, comprising:

[0007] Step S1, obtaining the historical average earthquake intensity and the historical earthquake frequency of the area where the building to be installed is located, and determining whether to connect the buckling restraint support device connecting component and the building to be installed by bolt connection or welding connection based on the average earthquake intensity of the area where the building to be installed is located within a preset time period and the earthquake frequency of the area where the building to be installed is located within a preset time period;

[0008] Step S2, when determining to connect the buckling restrained brace connection component and the building to be installed in a bolted manner, determining a priority fastening area based on a sensor installation area in the buckling restrained brace connection component and a structural deformation sensitive area in the buckling restrained brace connection component, wherein the structural deformation sensitive area is determined according to a cross-sectional change rate of the buckling restrained brace connection component;

[0009] Step S3, determining the tightening order of the bolts by a gravity-guided method or a key-node-guided method based on whether the three-dimensional shape of the priority tightening area is a regular three-dimensional shape;

[0010] Step S4, performing earthquake simulation on the installed buckling restraint brace devices within a preset period based on the historical average earthquake intensity and historical earthquake frequency of the area where the building to be installed is located, and determining whether to adjust the preset earthquake frequency, preset earthquake intensity and preset cross-section change rate based on whether the buckling restraint brace devices are damaged after the simulation is completed and the proportion of damaged buckling restraint brace devices.

[0011] Further, in step S1, determining the connection mode between the buckling restrained brace device connection component and the building to be installed includes:

[0012] If the average earthquake intensity of the area where the building to be installed is located within the preset time period is less than the preset average earthquake intensity, and the earthquake frequency of the area where the building to be installed is located within the preset time period is greater than the preset earthquake frequency, it is determined to connect the buckling restrained support device connecting component and the building to be installed by bolt connection;

[0013] If the average earthquake intensity in the area where the building to be installed is located within the preset time length is greater than or equal to the preset average earthquake intensity, or the average earthquake intensity in the area where the building to be installed is located within the preset time length is less than the preset average earthquake intensity and the earthquake frequency in the area where the building to be installed is located within the preset time length is less than or equal to the preset earthquake frequency, it is determined to connect the connecting component of the buckling restraint support device and the building to be installed by welding.

[0014] Furthermore, in step S2, determining the priority fastening area includes obtaining the position, type and function of all sensors in the connecting parts of the buckling restraint support device, and determining the area around each sensor that needs to be fastened as the priority fastening area based on the type and accuracy requirements of the sensor.

[0015] Further, in step S2, the structural deformation sensitive area is determined according to the cross-sectional change rate of the connection component of the buckling restraint support device, including:

[0016] If the cross-sectional change rate of the buckling restraining brace connection component is greater than a preset cross-sectional change rate, it is determined that the cross-sectional area of ​​the buckling restraining brace connection component is a structural deformation sensitive area.

[0017] Further, in step S3, determining the tightening sequence of the bolts includes:

[0018] If the three-dimensional shape of the priority tightening area is a regular three-dimensional shape, the tightening order of the bolts is determined by the gravity-guided method;

[0019] If the three-dimensional shape of the priority tightening area is an irregular three-dimensional shape, the tightening sequence of the bolts shall be determined by the key node guidance method.

[0020] Further, in step S4, determining whether to adjust the preset earthquake occurrence frequency, the preset earthquake intensity, and the preset cross-section change rate includes:

[0021] If the buckling restrained brace device is damaged after the simulation is completed and the proportion of the damaged buckling restrained brace devices is greater than the preset proportion, it is determined to adjust the preset earthquake frequency and the preset earthquake intensity;

[0022] If the buckling restraint brace device is damaged after the simulation is completed and the proportion of the damaged buckling restraint brace devices is less than or equal to the preset proportion, it is determined to adjust the preset cross-section change rate.

[0023] Further, in step S4, the adjustment amount of the preset earthquake frequency is negatively correlated with the proportion of the number of damaged buckling restraint support devices, the adjustment amount of the preset earthquake intensity is negatively correlated with the proportion of the number of damaged buckling restraint support devices, and the adjustment amount of the preset cross-sectional change rate is negatively correlated with the proportion of the number of damaged buckling restraint support devices.

[0024] Further, in step S3, determining the bolt tightening sequence by the gravity-oriented method includes:

[0025] Determine the center of gravity position of the regular three-dimensional shape in the priority fastening area;

[0026] The bolt with the smallest distance from the center of gravity is used as the starting bolt for tightening;

[0027] Begin by tightening the bolts at the beginning, and tighten the bolts according to the principle of tightening the two opposite sides at the same time;

[0028] After completing one layer or one direction of bolt tightening, perform multiple cycles of tightening;

[0029] After each tightening cycle, check the flatness, verticality and relative position relationship of the connected parts with other parts. If there is local deformation or position displacement, adjust the tightening sequence and tightening degree in time.

[0030] Further, in step S3, determining the bolt tightening sequence by the key node guidance method includes:

[0031] Identify key nodes, including shape mutation points, key force transmission intersection points, and key nodes around sensor installation locations;

[0032] Sorting the key nodes, the key intersection points of force transmission are better than the key nodes around the sensor installation position, and the key nodes around the sensor installation position are better than the shape mutation points;

[0033] Selecting a starting key node from the sorted key nodes, wherein the key node is a key node connected to the main force-bearing structure of the building;

[0034] After tightening the starting key node, tighten the bolts around the node with the node as the center;

[0035] After completing the tightening of the first key node and its surrounding bolts, perform the same operation on other key nodes in sequence according to the determined key node tightening sequence.

[0036] A buckling restrained brace installed by the buckling restrained brace installation method, comprising:

[0037] A core support component, which includes a buckling restraining support column for restraining the buckling of the core material and a core material for dissipating energy by buckling in tension and compression under the action of earthquake horizontal forces;

[0038] The connecting component comprises a first connecting component, a second connecting component and a fastening bolt for connecting the building to be installed.

[0039] Compared with the prior art, the beneficial effect of the present invention lies in that, by considering the average intensity and frequency of earthquakes within a preset time period, the present invention can select a suitable connection method according to the actual seismic activity situation. For situations where the average intensity of earthquakes is small and the frequency is high, bolt connection is adopted. This connection method has certain flexibility under the action of frequent small-amplitude earthquakes, can better adapt to vibrations, and reduce stress concentration and fatigue damage at the connection parts. For situations where the earthquake intensity is large or the intensity is small but the frequency is low, welding connection is adopted, which can provide higher connection strength and integrity, and ensure that the connection between the buckling restraint support device and the building structure is firm and reliable under the action of strong earthquakes, thereby improving the seismic safety of the building.

[0040] Furthermore, the present invention can ensure that the connection around the sensor is firm and stable by determining an area with a radius of 8 cm centered on the sensor as a priority fastening area. When the building structure is subjected to external loads (such as earthquakes, wind loads, etc.), the sensor needs to accurately measure parameters such as the strain and displacement of the buckling restraint support device. If the connection around the sensor is not firm, it may cause a slight change in the position of the sensor, thereby affecting the measurement accuracy. By clarifying the priority fastening area, this error can be minimized to the greatest extent, and the accuracy and reliability of the sensor measurement can be improved; focusing on fastening the area around the sensor can prevent the sensor from loosening or being damaged due to factors such as vibration and temperature changes during long-term use. In particular, for high-precision strain sensors and displacement sensors, which have higher requirements for installation stability, by prioritizing the fastening of the sensor installation area, Ensure that the sensor can work normally under various complex environmental conditions, and provide continuous and reliable data support for the safety monitoring of building structures; based on the judgment of the cross-sectional change rate: determine the sensitive area of ​​structural deformation according to the comparison result of the cross-sectional change rate of the connecting parts of the buckling restraint support device with the preset cross-sectional change rate. This method is scientific and accurate. Parts with large cross-sectional change rates are prone to stress concentration and deformation incoordination, and are more likely to be damaged under external forces such as earthquakes. The sensitive areas of structural deformation determined in this way can be strengthened and monitored in a targeted manner to improve the seismic performance of the entire buckling restraint support device. The above method improves the accuracy of the connection method analysis during the installation of the buckling restraint support device, thereby improving the installation efficiency and service life of the buckling restraint support device.

[0041] Furthermore, for the priority tightening area of ​​regular three-dimensional shape, the center of gravity-guided method of the present invention can quickly determine a stable tightening starting point, that is, the bolt with the smallest distance from the center of gravity position. Starting from this point, the bolts are tightened according to the principle of tightening two opposite surfaces at the same time, which can make the tightening process more orderly and efficient. At the same time, after completing the tightening of the bolts in one layer or one direction, multiple tightening cycles are carried out, and the status of the connecting parts is checked after each cycle, which can ensure uniform tightening, avoid local over-tightening or over-loosening, and improve the tightening quality. The key node guidance method is adopted for irregular shapes. In the priority tightening area of ​​the irregular three-dimensional shape, the key node guidance method can accurately identify important parts such as shape mutation points, key intersection points of force transmission, and key nodes around the sensor installation position. Tightening starts from the key node connected to the main load-bearing structure of the building, and the tightening is diffused to the surrounding bolts with the node as the center. It can ensure that the force transmission is more reasonable and the connection is more firm under complex shapes. The operation is carried out in sequence according to the determined key node tightening order, which can avoid the problems caused by blind tightening and improve the pertinence and effectiveness of tightening. The above method improves the accuracy of connection mode analysis during the installation of the buckling restraint support device, thereby improving the installation efficiency and service life of the buckling restraint support device.

[0042] Furthermore, the present invention simulates historical earthquake-related parameters of the area where the building to be installed is located, and determines whether to adjust the preset earthquake frequency, preset earthquake intensity and preset cross-section change rate based on whether the buckling restraint support device is damaged after the simulation and the proportion of the damaged number, thereby achieving targeted optimization of the seismic performance of the structure. For example, when the device is damaged after the simulation and the damage ratio is greater than the preset number ratio, it means that the bolt fastening method cannot meet the seismic requirements. At this time, the preset earthquake frequency and the preset earthquake intensity are reduced by the first adjustment coefficient, so that the structure has a stronger resistance to earthquakes. When the device is damaged after the simulation and the damage ratio is less than or equal to the preset number ratio, it means that when judging the fastening priority area, the judgment of the sensitive deformation area of ​​the structure is inaccurate due to the excessive preset cross-section change rate, resulting in a short service life of a few buckling restraint support devices. At this time, the preset cross-section change rate is reduced by the second adjustment coefficient. The above method improves the accuracy of the connection method analysis during the installation of the buckling restraint support device, thereby improving the installation efficiency and service life of the buckling restraint support device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a workflow diagram of a method for installing a buckling restraining support device according to an embodiment of the present invention;

[0044] Figure 2 A flowchart of a method for connecting a buckling restrained brace device connecting component to a building to be installed in a buckling restrained brace device installation method according to an embodiment of the present invention;

[0045] Figure 3 A flowchart for determining a bolt tightening sequence in a buckling restrained support device installation method according to an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of the structure of a buckling restrained brace installed by a buckling restrained brace installation method according to an embodiment of the present invention;

[0047] In the figure, 1, first connecting component; 2, second connecting component; 3, buckling restraint support column; 4, fastening bolt; 5, core material. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0051] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] See also Figure 1-Figure 3 As shown, Figure 1 This is a workflow diagram of a method for installing a buckling restraining support device according to an embodiment of the present invention;

[0053] Figure 2 A flowchart of a method for connecting a buckling restrained brace device connecting component to a building to be installed in a buckling restrained brace device installation method according to an embodiment of the present invention;

[0054] Figure 3The present invention is a flowchart of a process for determining a bolt tightening sequence in a buckling restraint support device installation method according to an embodiment of the present invention.

[0055] The buckling restraining support device installation method of the embodiment of the present invention includes:

[0056] Step S1, obtaining the historical average earthquake intensity and the historical earthquake frequency of the area where the building to be installed is located, and determining whether to connect the buckling restraint support device connecting component and the building to be installed by bolt connection or welding connection based on the average earthquake intensity of the area where the building to be installed is located within a preset time period and the earthquake frequency of the area where the building to be installed is located within a preset time period;

[0057] Step S2, when determining to connect the buckling restrained brace connection component and the building to be installed in a bolted manner, determining a priority fastening area based on a sensor installation area in the buckling restrained brace connection component and a structural deformation sensitive area in the buckling restrained brace connection component, wherein the structural deformation sensitive area is determined according to a cross-sectional change rate of the buckling restrained brace connection component;

[0058] Step S3, determining the tightening order of the bolts by a gravity-guided method or a key-node-guided method based on whether the three-dimensional shape of the priority tightening area is a regular three-dimensional shape;

[0059] Step S4, performing earthquake simulation on the installed buckling restraint brace devices within a preset period based on the historical average earthquake intensity and historical earthquake frequency of the area where the building to be installed is located, and determining whether to adjust the preset earthquake frequency, preset earthquake intensity and preset cross-section change rate based on whether the buckling restraint brace devices are damaged after the simulation is completed and the proportion of damaged buckling restraint brace devices.

[0060] In the embodiment of the present invention, the earthquake simulation of the installed buckling restraint support device within a preset period based on the historical average earthquake intensity and historical earthquake frequency of the area where the building to be installed is located includes determining the intensity indicators such as the peak acceleration of the simulated earthquake activity based on the historical average earthquake intensity of the area where the building to be installed is located. For example, if the magnitude corresponding to the historical average earthquake intensity in the area is around 5 on the Richter scale, the corresponding peak acceleration can be determined by referring to the relevant seismic motion parameter specifications. Generally speaking, the peak ground acceleration corresponding to a Richter magnitude 5 earthquake may be between 0.1g and 0.2g (g is the acceleration of gravity); according to the historical earthquake frequency, the frequency characteristics such as the outstanding frequency of the simulated seismic wave are determined. For example, if the earthquake frequency in the area is relatively high and mostly concentrated in a certain frequency band, such as between 1Hz and 5Hz, then the generation and input of seismic waves in this frequency band need to be focused on during the simulation; according to the engineering The preset period of simulation is reasonably set based on factors such as engineering requirements and structural importance. For general building structures, the preset period can be set to several decades or even hundreds of years (preferably 50 years) to fully consider the earthquakes that may be encountered during the service life of the building; Select appropriate seismic wave records: Select seismic wave records with similar seismic characteristics to the area where the building to be installed is located from the existing seismic database as the basis. If the historical earthquakes in the area are mainly shallow-source earthquakes and the geological conditions are relatively special, then shallow-source seismic wave records with similar characteristics are given priority; According to the determined simulation parameters, the selected seismic wave records are adjusted and corrected to meet the preset seismic intensity and frequency requirements, for example, the acceleration peak is adjusted by scaling the amplitude of the seismic wave, and the frequency component is adjusted by filtering and other methods; Establish a detailed finite element model of the building structure including the buckling restraint support device and the connected building structure.The mechanical properties and connection methods of the buckling restrained brace are accurately simulated, and the geometric dimensions and material properties of the beams, columns, walls and other components of the building structure are accurately modeled to ensure that the model can truly reflect the mechanical behavior of the actual structure; the boundary conditions of the structural model, such as the setting of fixed supports and sliding supports, are reasonably determined to simulate the connection method and constraint conditions between the actual structure and the foundation, so as to ensure that the response of the structure under earthquake action conforms to the actual situation; the generated seismic waves are input into the established structural model, and the dynamic response of the buckling restrained brace and the entire building structure under earthquake action is calculated by time history analysis method, including the change history of displacement, velocity, acceleration, internal force, etc. over time. Through time history analysis, the stress state and deformation of the structure at different times can be obtained, providing detailed data support for evaluating the seismic performance of the structure; since the buckling restrained brace may enter a nonlinear working state under earthquake action, the influence of factors such as material nonlinearity and geometric nonlinearity needs to be considered in the earthquake simulation analysis. For example, a suitable constitutive model is used to describe the stress-strain relationship of the steel of the buckling restrained brace under large deformation to more accurately simulate its mechanical behavior under earthquake action.

[0061] Specifically, in step S1, when determining to connect the buckling restrained brace connection component to the building to be installed, it is determined to connect the buckling restrained brace connection component to the building to be installed by bolt connection or welding connection according to the average earthquake intensity of the area where the building to be installed is located within a preset time length, and the earthquake occurrence frequency of the area where the building to be installed is located within a preset time length;

[0062] When the average earthquake intensity of the area where the building to be installed is located within the preset time period is less than the preset average earthquake intensity, and the earthquake frequency of the area where the building to be installed is located within the preset time period is greater than the preset earthquake frequency, it is determined to connect the buckling restrained support device connecting component and the building to be installed in a bolted manner;

[0063] When the average earthquake intensity in the area where the building to be installed is located within a preset time period is greater than or equal to the preset average earthquake intensity, or the average earthquake intensity in the area where the building to be installed is located within the preset time period is less than the preset average earthquake intensity and the earthquake occurrence frequency in the area where the building to be installed is located within the preset time period is less than or equal to the preset earthquake occurrence frequency, it is determined to connect the connecting component of the buckling restraint support device and the building to be installed by welding.

[0064] In the embodiment of the present invention, the value of the preset time length is preferably 5 years, the preset average earthquake intensity is the average historical earthquake intensity of the area where the building to be installed is located, the historical average earthquake intensity is the average magnitude of earthquakes within 50 years, and the preset earthquake occurrence frequency is the average historical earthquake occurrence frequency of the area where the building to be installed is located, and the historical average earthquake frequency is the earthquake occurrence frequency within 50 years, but the above values ​​are not limited to this, and technical personnel in this field can also adjust the values ​​according to actual needs.

[0065] By considering the average intensity and frequency of earthquakes within a preset time period, the present invention can select a suitable connection method according to the actual seismic activity situation. For situations where the average intensity of earthquakes is small and the frequency is high, bolt connection is adopted. This connection method has a certain flexibility under the action of frequent small-amplitude earthquakes, can better adapt to vibrations, and reduce stress concentration and fatigue damage at the connection parts. For situations where the earthquake intensity is large or the intensity is small but the frequency is low, welding connection is adopted, which can provide higher connection strength and integrity, and ensure that the connection between the buckling restraint support device and the building structure is firm and reliable under the action of strong earthquakes, thereby improving the seismic safety of the building.

[0066] Specifically, in step S2, determining the priority fastening area based on the sensor installation area in the connecting component of the buckling restraint support device includes obtaining the position, type and function of all sensors in the connecting component of the buckling restraint support device, and determining the area around each sensor that needs to be fastened as the priority fastening area according to the type and accuracy requirements of the sensor.

[0067] In the embodiment of the present invention, a high-precision strain sensor and a displacement sensor are installed on the buckling restraint support device to be installed. The positions of the sensors are determined through design drawings to be near the middle and end connection parts of the support device respectively. According to the accuracy requirements of the sensors, the area with a radius of 8 cm centered on the sensor is determined to be the area range that needs to be tightened. The area with a radius of 8 cm centered on the sensor is the area that needs to be tightened as the priority tightening area.

[0068] Specifically, in step S2, when determining the structural deformation sensitive area, the structural deformation sensitive area is determined according to the comparison result of the cross-sectional change rate of the connecting component of the buckling restraint support device and the preset cross-sectional change rate;

[0069] When the cross-sectional change rate of the buckling restraining brace connection component is greater than a preset cross-sectional change rate, determining that the cross-sectional area of ​​the buckling restraining brace connection component is a structural deformation sensitive area;

[0070] When the cross-sectional change rate of the buckling restraining brace connecting component is less than or equal to a preset cross-sectional change rate, it is determined that the cross-sectional area of ​​the buckling restraining brace connecting component is not a structural deformation sensitive area.

[0071] In the embodiment of the present invention, the structural deformation sensitive area is a priority fastening area, and the preset cross-sectional change rate is the average cross-sectional change rate of the connecting parts of the buckling restraint support device, but the above value is not limited to this, and technical personnel in this field can also adjust the value according to actual needs.

[0072] In the embodiment of the present invention, if there are multiple priority fastening areas of different types, priority fastening areas of the sensor installation area type are preferentially selected; if there are multiple priority fastening areas of the same type, priority fastening areas close to the center of gravity of the building are preferentially selected. The priority fastening areas include priority fastening areas of the sensor installation area type and priority fastening areas of the structural deformation sensitive area type.

[0073] The present invention can ensure that the connection around the sensor is firm and stable by determining the area with a radius of 8 cm centered on the sensor as the priority fastening area. When the building structure is subjected to external loads (such as earthquakes, wind loads, etc.), the sensor needs to accurately measure parameters such as the strain and displacement of the buckling restraint support device. If the connection around the sensor is not firm, it may cause a slight change in the position of the sensor, thereby affecting the measurement accuracy. By clarifying the priority fastening area, this error can be minimized to the greatest extent, and the accuracy and reliability of the sensor measurement can be improved; focusing on fastening the area around the sensor can prevent the sensor from loosening or being damaged due to factors such as vibration and temperature changes during long-term use. In particular, for high-precision strain sensors and displacement sensors, which have higher requirements for installation stability, by prioritizing the fastening of the sensor installation area, Ensure that the sensor can work normally under various complex environmental conditions, and provide continuous and reliable data support for the safety monitoring of building structures; based on the judgment of the cross-sectional change rate: determine the sensitive area of ​​structural deformation according to the comparison result of the cross-sectional change rate of the connecting parts of the buckling restraint support device with the preset cross-sectional change rate. This method is scientific and accurate. Parts with large cross-sectional change rates are prone to stress concentration and deformation incoordination, and are more likely to be damaged under external forces such as earthquakes. The sensitive areas of structural deformation determined in this way can be strengthened and monitored in a targeted manner to improve the seismic performance of the entire buckling restraint support device. The above method improves the accuracy of the connection method analysis during the installation of the buckling restraint support device, thereby improving the installation efficiency and service life of the buckling restraint support device.

[0074] Specifically, in step S3, when determining the tightening order of the bolts, the tightening order of the bolts is determined according to whether the three-dimensional shape of the priority tightening area is a regular three-dimensional shape;

[0075] When the three-dimensional shape of the priority fastening area is a regular three-dimensional shape, the fastening sequence of the bolts is determined by the gravity-guided method;

[0076] When the three-dimensional shape of the priority fastening area is an irregular three-dimensional shape, the fastening sequence of the bolts is determined by the key node guidance method.

[0077] In the embodiment of the present invention, judging whether the three-dimensional shape of the priority fastening area is a regular three-dimensional shape includes but is not limited to "judging by using a geometric feature comparison method, judging by using a mathematical model judgment method, and judging by using a decomposition and combination judgment method"; for example, the three-dimensional shape of the priority fastening area is compared with common regular geometric shapes (such as cubes, cuboids, cylinders, spheres, cones, etc.). If the shape can basically match one of these standard geometric shapes in terms of overall contour, or can match after simple translation, rotation, and symmetry transformation, then it can be judged to be a regular three-dimensional shape.

[0078] Specifically, in step S3, the step of determining the bolt tightening sequence by the gravity-guided method includes:

[0079] Determine the center of gravity position of the regular three-dimensional shape in the priority fastening area;

[0080] The bolt with the smallest distance from the center of gravity is used as the starting bolt for tightening;

[0081] Begin by tightening the bolts at the beginning, and tighten the bolts according to the principle of tightening the two opposite sides at the same time;

[0082] After completing one layer or one direction of bolt tightening, perform multiple cycles of tightening;

[0083] After each tightening cycle, check the flatness, verticality and relative position relationship of the connected parts with other parts. If there is local deformation or position displacement, adjust the tightening sequence and tightening degree in time.

[0084] The embodiment of the present invention measures the size of the connecting component. The length, width and height of the rectangular connecting component are measured to be 2 meters, 1.5 meters and 1 meter respectively. The center of gravity is calculated. According to the calculation formula of the center of gravity of the rectangular parallelepiped, the center of gravity is located at the center of the length, width and height, that is, the center of gravity coordinates are (1 meter, 0.75 meters, 0.5 meters). The bolt distribution is determined. Several bolts are evenly distributed on the connecting component, and the bolt spacing is 20 centimeters. The bolt closest to the center of gravity is measured. Through measurement, it is determined that the bolt coordinates closest to the center of gravity position (1 meter, 0.75 meters, 0.5 meters) are (0.95 meters, 0.78 meters, 0.52 meters). This bolt is determined as the starting tightening bolt; bolt tightening is performed according to the principle of tightening two opposite surfaces at the same time. First, the two opposite surfaces of the front and back of the rectangular parallelepiped are selected, and the bolts on the opposite surfaces are tightened at the same time. Starting from the surface where the starting tightening bolt is located, the bolts are tightened in sequence in the opposite direction. Ensure that the tightening degree of the bolts on the two surfaces is basically the same to maintain the force balance. After completing the tightening of one layer or one direction of the bolts, perform multiple cycles of tightening to complete the first layer of tightening. Complete the tightening of one layer of bolts on the bottom surface of the rectangular connection component, perform the first cycle of tightening, tighten the tightened bolts again according to 70% of the specified torque, and check whether the tightening degree of the bolts is uniform; perform the second cycle of tightening, increase the torque to 90%, tighten the bolts again, and observe the deformation of the connection parts; use a level and a total station to check the flatness and verticality of the connection parts. It was found that there was a slight unevenness around some bolts; adjust the bolts near the uneven area, appropriately increase or decrease the tightening torque to ensure that the flatness and verticality of the connection parts meet the requirements, and then continue to the next cycle of tightening.

[0085] Specifically, in step S3, the step of determining the bolt tightening sequence by the key node guidance method includes:

[0086] Identify key nodes, including shape mutation points, key force transmission intersection points, and key nodes around sensor installation locations;

[0087] Sorting the key nodes, the key intersection points of force transmission are better than the key nodes around the sensor installation position, and the key nodes around the sensor installation position are better than the shape mutation points;

[0088] Selecting a starting key node from the sorted key nodes, wherein the key node is a key node connected to the main force-bearing structure of the building;

[0089] After tightening the starting key node, tighten the bolts around the node with the node as the center;

[0090] After completing the tightening of the first key node and its surrounding bolts, perform the same operation on other key nodes in sequence according to the determined key node tightening sequence.

[0091] The embodiment of the present invention first identifies key nodes, including shape mutation points, for example, on one side of the connecting component, the position where the steel pipe with a diameter of 30 cm suddenly changes to a steel pipe with a diameter of 20 cm, key intersection points of force transmission, for example, the welding position where the end of the support device is connected to the building steel beam, which is the key position where the force is transmitted from the support device to the building structure, and key nodes around the sensor installation position, for example, the sensor is fixed to the connecting component by a special clamp, and the connection bolts between the clamp and the connecting component are the key nodes; the key nodes are sorted, and the key intersection points of force transmission are better than the key nodes around the sensor installation position, and the key nodes around the sensor installation position are better than the shape mutation points, so in this example, the key nodes are sorted as follows: first, the welding position where the support device is connected to the building steel beam, followed by the connection point of the displacement sensor mounting bracket and the connecting component, and finally the transition from the thick tube to the thin tube of the connecting component; the key node connected to the main force-bearing structure of the building, that is, the welding position where the support device is connected to the building steel beam is selected as the starting key node; the starting key node is tightened, and the bolts near the welding position where the support device is connected to the building steel beam are first tightened. These bolts are made of high-strength bolts and tightened according to the specified torque to ensure a firm connection; spread the tightening to the surrounding bolts, and tighten the surrounding bolts with the starting key node as the center. For example, starting from the welding position, tighten the nearby bolts in sequence along the direction of connection with the steel beam. At the same time, pay attention to keeping the tightening degree of the bolts uniform to avoid local stress concentration; tighten the key nodes around the sensor installation position, and after completing the tightening of the starting key nodes and their surrounding bolts, start tightening the bolts near the connection point between the displacement sensor mounting bracket and the connecting component. Similarly, tighten in a certain order and torque to ensure that the sensor is firmly installed and will not loosen due to vibration. Finally, tighten the bolts near the shape mutation point at the transition from the thick tube to the thin tube of the connecting component. Be careful not to over-tighten the bolts here to avoid deformation of the connecting component.

[0092] For the priority fastening area of ​​regular three-dimensional shape, the center of gravity guided method of the present invention can quickly determine a stable fastening starting point, that is, the bolt with the smallest distance from the center of gravity position. Starting from this point, the bolts are tightened according to the principle of tightening two opposite surfaces at the same time, which can make the fastening process more orderly and efficient. At the same time, after completing the tightening of the bolts in one layer or one direction, multiple tightening cycles are carried out, and the status of the connecting parts is checked after each cycle, which can ensure uniform tightening, avoid local over-tightening or over-loosening, and improve the tightening quality. The key node guidance method is adopted for irregular shapes. In the priority tightening area of ​​the irregular three-dimensional shape, the key node guidance method can accurately identify important parts such as shape mutation points, key intersection points of force transmission, and key nodes around the sensor installation position. Tightening starts from the key node connected to the main load-bearing structure of the building, and the tightening is diffused to the surrounding bolts with the node as the center. It can ensure that the force transmission is more reasonable and the connection is more firm under complex shapes. The operation is carried out in sequence according to the determined key node tightening order, which can avoid the problems caused by blind tightening and improve the pertinence and effectiveness of tightening. The above method improves the accuracy of connection mode analysis during the installation of the buckling restraint support device, thereby improving the installation efficiency and service life of the buckling restraint support device.

[0093] Specifically, in step S4, when determining whether to adjust the preset earthquake frequency, the preset earthquake intensity, and the preset cross-sectional change rate, it is determined whether to adjust the preset earthquake frequency, the preset earthquake intensity, and the preset cross-sectional change rate based on whether the buckling restraint support device is damaged after the simulation is completed, and the proportion of the number of damaged buckling restraint support devices;

[0094] When the buckling restraint brace device is damaged after the simulation is completed and the proportion of the damaged buckling restraint brace devices is greater than the preset proportion, it is determined to adjust the preset earthquake frequency and the preset earthquake intensity;

[0095] When the buckling restraining brace device is damaged after the simulation is completed and the proportion of the damaged buckling restraining brace devices is less than or equal to the preset proportion, determining to adjust the preset cross-section change rate;

[0096] When the buckling restraint support device is not damaged after the simulation is completed, it is determined that there is no need to adjust the preset earthquake frequency, the preset earthquake intensity, and the preset cross-section change rate.

[0097] In the embodiment of the present invention, it is judged that damage to the buckling restraint support device after the simulation is completed, including but not limited to "bolt breakage, internal force calculated by simulation exceeding the design limit bearing capacity, and excessive deformation of the buckling restraint support device", and the value range of the preset number ratio is set to 0.1-0.3, and the value of the preset ratio is preferably 0.2, but the above value is not limited to this, and technical personnel in this field can also adjust the value according to actual needs.

[0098] Specifically, in step S4, when it is determined to adjust the preset earthquake frequency and the preset earthquake intensity, the preset earthquake frequency and the preset earthquake intensity are adjusted with the first adjustment coefficient, and when it is determined to adjust the preset cross-section change rate, the preset cross-section change rate is adjusted with the second adjustment coefficient.

[0099] In the embodiment of the present invention, the value range of the first adjustment coefficient is set to 0.82-0.96, and the value of the first adjustment coefficient is preferably 0.88. The value range of the second adjustment coefficient is set to 0.83-0.94, and the value of the second adjustment coefficient is preferably 0.86. The adjustment amount of the preset earthquake frequency is negatively correlated with the proportion of the number of damaged buckling restraint support devices, the adjustment amount of the preset earthquake intensity is negatively correlated with the proportion of the number of damaged buckling restraint support devices, and the adjustment amount of the preset cross-sectional change rate is negatively correlated with the proportion of the number of damaged buckling restraint support devices. However, the above values ​​are not limited to this, and those skilled in the art may also adjust the values ​​according to actual needs.

[0100] The present invention simulates historical earthquake-related parameters of the area where the building to be installed is located, and determines whether to adjust the preset earthquake frequency, preset earthquake intensity and preset cross-section change rate based on whether the buckling restraint support device is damaged and the proportion of damaged number after simulation, thereby realizing targeted optimization of the seismic performance of the structure. For example, when the device is damaged after simulation and the damage proportion is greater than the preset number proportion, it means that the bolt fastening method cannot meet the seismic requirements. At this time, the preset earthquake frequency and the preset earthquake intensity are reduced by the first adjustment coefficient, so that the structure has a stronger resistance to earthquakes. When the device is damaged after simulation and the damage proportion is less than or equal to the preset number proportion, it means that when judging the fastening priority area, the judgment of the sensitive deformation area of ​​the structure is inaccurate due to the excessive preset cross-section change rate, resulting in a short service life of a few buckling restraint support devices. At this time, the preset cross-section change rate is reduced by the second adjustment coefficient. The above method improves the accuracy of the connection method analysis during the installation of the buckling restraint support device, thereby improving the installation efficiency and service life of the buckling restraint support device.

[0101] See also Figure 4 As shown, Figure 4It is a schematic diagram of the structure of a buckling restraining brace installed by the buckling restraining brace installation method applied to an embodiment of the present invention.

[0102] Specifically, a buckling restrained brace installed by the buckling restrained brace installation method comprises:

[0103] A core support component, which includes a buckling restraining support column 3 for restraining the buckling of the core material and a core material 5 for consuming energy by buckling in tension and compression under the action of earthquake horizontal force;

[0104] The connecting component comprises a first connecting component 1, a second connecting component 2 and a fastening bolt 4 for connecting the building to be installed.

[0105] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for installing a buckling restraint support device, characterized in that: include: Step S1, obtaining the historical average earthquake intensity and the historical earthquake frequency of the area where the building to be installed is located, and determining whether to connect the buckling restraint support device connecting component and the building to be installed by bolt connection or welding connection based on the average earthquake intensity of the area where the building to be installed is located within a preset time period and the earthquake frequency of the area where the building to be installed is located within a preset time period; Step S2, when determining to connect the buckling restrained brace connection component and the building to be installed in a bolted manner, determining a priority fastening area based on a sensor installation area in the buckling restrained brace connection component and a structural deformation sensitive area in the buckling restrained brace connection component, wherein the structural deformation sensitive area is determined according to a cross-sectional change rate of the buckling restrained brace connection component; Step S3, determining the tightening order of the bolts by a gravity-guided method or a key-node-guided method based on whether the three-dimensional shape of the priority tightening area is a regular three-dimensional shape; Step S4, performing earthquake simulation on the installed buckling restrained brace devices within a preset period based on the historical average earthquake intensity and the historical earthquake frequency of the area where the building to be installed is located, and determining whether to adjust the preset earthquake frequency, the preset earthquake intensity, and the preset cross-section change rate based on whether the buckling restrained brace devices are damaged after the simulation is completed and the proportion of the damaged buckling restrained brace devices; In step S3, determining the bolt tightening sequence by the gravity-oriented method includes: Determine the center of gravity position of the regular three-dimensional shape in the priority fastening area; The bolt with the smallest distance from the center of gravity is used as the starting bolt for tightening; Begin by tightening the bolts at the beginning, and tighten the bolts according to the principle of tightening the two opposite sides at the same time; After completing one layer or one direction of bolt tightening, perform multiple cycles of tightening; After each tightening cycle, check the flatness, verticality and relative position relationship of the connected parts with other parts. If there is local deformation or position deviation, adjust the tightening sequence and tightening degree in time; In step S3, determining the bolt tightening sequence by the key node guidance method includes: Identify key nodes, including shape mutation points, key force transmission intersection points, and key nodes around sensor installation locations; Sorting the key nodes, the key intersection points of force transmission are better than the key nodes around the sensor installation position, and the key nodes around the sensor installation position are better than the shape mutation points; Selecting a starting key node from the sorted key nodes, wherein the key node is a key node connected to the main force-bearing structure of the building; After tightening the starting key node, tighten the bolts around the node with the node as the center; After completing the tightening of the first key node and its surrounding bolts, perform the same operation on other key nodes in sequence according to the determined key node tightening sequence.

2. The buckling restrained support device installation method according to claim 1, characterized in that: In step S1, determining the connection method between the buckling restrained brace device connection component and the building to be installed includes: If the average earthquake intensity of the area where the building to be installed is located within the preset time period is less than the preset average earthquake intensity, and the earthquake frequency of the area where the building to be installed is located within the preset time period is greater than the preset earthquake frequency, it is determined to connect the buckling restrained support device connecting component and the building to be installed by bolt connection; If the average earthquake intensity in the area where the building to be installed is located within the preset time length is greater than or equal to the preset average earthquake intensity, or the average earthquake intensity in the area where the building to be installed is located within the preset time length is less than the preset average earthquake intensity and the earthquake occurrence frequency in the area where the building to be installed is located within the preset time length is less than or equal to the preset earthquake occurrence frequency, it is determined to connect the connecting component of the buckling restraint support device and the building to be installed by welding.

3. The buckling restrained support device installation method according to claim 1, characterized in that: In step S2, determining the priority fastening area includes obtaining the position, type and function of all sensors in the connection parts of the buckling restraint support device, and determining the area around each sensor that needs to be fastened as the priority fastening area according to the type and accuracy requirements of the sensor.

4. The buckling restrained support device installation method according to claim 1, characterized in that: In step S2, the structural deformation sensitive area is determined according to the cross-sectional change rate of the connection component of the buckling restraint support device, including: If the cross-sectional change rate of the buckling restraining brace connection component is greater than a preset cross-sectional change rate, it is determined that the cross-sectional area of ​​the buckling restraining brace connection component is a structural deformation sensitive area.

5. The buckling restrained brace installation method according to claim 1, characterized in that: In step S3, determining the tightening sequence of the bolts includes: If the three-dimensional shape of the priority tightening area is a regular three-dimensional shape, the tightening order of the bolts is determined by the gravity-guided method; If the three-dimensional shape of the priority tightening area is an irregular three-dimensional shape, the tightening sequence of the bolts shall be determined by the key node guidance method.

6. The buckling restrained brace installation method according to claim 1, characterized in that: In step S4, determining whether to adjust the preset earthquake occurrence frequency, the preset earthquake intensity, and the preset cross-section change rate includes: If the buckling restrained brace device is damaged after the simulation is completed and the proportion of the damaged buckling restrained brace devices is greater than the preset proportion, it is determined to adjust the preset earthquake frequency and the preset earthquake intensity; If the buckling restraint brace device is damaged after the simulation is completed and the proportion of the damaged buckling restraint brace devices is less than or equal to the preset proportion, it is determined to adjust the preset cross-section change rate.

7. The buckling restrained brace installation method according to claim 1, characterized in that: In step S4, the adjustment amount of the preset earthquake frequency is negatively correlated with the proportion of the number of damaged buckling restraint support devices, the adjustment amount of the preset earthquake intensity is negatively correlated with the proportion of the number of damaged buckling restraint support devices, and the adjustment amount of the preset cross-sectional change rate is negatively correlated with the proportion of the number of damaged buckling restraint support devices.

8. A buckling restrained brace installed by the buckling restrained brace installation method according to any one of claims 1 to 7, characterized in that: include: A core support component, which includes a buckling restraining support column for restraining the buckling of the core material and a core material for dissipating energy by buckling in tension and compression under the action of earthquake horizontal forces; The connecting component comprises a first connecting component, a second connecting component and a fastening bolt for connecting the building to be installed.

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