A building structure health monitoring and early warning system and method

Abstract

The present invention provides a building structure health monitoring and early warning system and method, the system comprising: a data acquisition and classification module, a structural analysis and evaluation module, an independent risk assessment module, a collapse dynamic analysis module, and a comprehensive safety analysis module. This method does not only stop at the evaluation of a single floor, but also comprehensively considers the mutual influence between floors. This design overcomes the limitations of traditional analysis methods and can clearly identify which floors have potential collapse risks and how these risks affect adjacent floors. This holistic perspective analysis can more comprehensively reflect the real risks that a building may face after a disaster, avoiding misjudgments caused by local analysis.

Description

Technical Field

[0001] The present invention relates to the field of building safety technology, and in particular to a building structure health monitoring and early warning system and method. Background Art

[0002] The field of post-disaster building health monitoring technology mainly involves structural safety assessment and health monitoring of buildings after natural disasters. The core goal of this field is to timely assess the degree of damage to the building, determine whether it is safe to use, and provide a scientific basis for subsequent repair and reconstruction.

[0003] After a building is hit by a disaster, current building monitoring is based on an overall analysis of each floor to see if the building has cracks, aging, etc., and whether there is a risk of collapse. However, for floors with potential collapse, even if other adjacent floors are not currently at risk of collapse, when a floor with a risk of collapse collapses, it will still change the risk status of the floors that originally had no risk, and after the collapse, it will crush the floors below, making the floors that originally had no risk of collapse become risky or collapse directly. Therefore, the existing analysis methods are not comprehensive enough. Summary of the invention

[0004] The purpose of the present invention is to provide a building structure health monitoring and early warning system to solve the technical problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides a building structure health monitoring and early warning system, the system comprising: The data collection and classification module is used to automatically collect sensor data, establish a monitoring database, and classify the collected data using floors as labels; The structural analysis and evaluation module is used to establish a structural analysis model, substitute the data corresponding to different floors, evaluate the stress and strain parameters of each floor, and determine whether the structure has cracks or aging; Independent risk assessment module, used to build an independent risk assessment model, and based on the analysis results of the structural analysis model, simulate the independent potential collapse of each floor, and determine the specific collapse location and possible collapse mode through simulation; The collapse dynamic analysis module is used to simulate the mass distribution and force transmission path of the collapsed floor, calculate the magnitude and point of action of the collapse force after the collapsed floor collapses, evaluate the force conditions of the adjacent floors during the collapse process, and determine whether they can support the impact of the collapse above; The comprehensive safety analysis module is used to comprehensively analyze the results and calculate the overall safety factor based on the collapse risk of each floor.

[0006] Another object of the present invention is to provide a building structure health monitoring and early warning method, the method comprising: Automatically collect sensor data, establish a monitoring database, and classify the collected data by floor; Establish a structural analysis model, substitute the data corresponding to different floors, evaluate the stress and strain parameters of each floor, and determine whether the structure has cracks or aging; Construct an independent risk assessment model and simulate the independent potential collapse of each floor based on the analysis results of the structural analysis model, and determine the specific collapse location and possible collapse mode through simulation; Simulate the mass distribution and force transmission path of the collapsed floor, calculate the magnitude and point of action of the collapse force after the collapsed floor collapses, evaluate the force conditions of the adjacent floors during the collapse process, and determine whether they can support the impact of the collapse above; The overall safety factor is calculated based on the comprehensive analysis results and the collapse risk of each floor.

[0007] As a further solution of the present invention, the structural analysis model is established, the data corresponding to different floors are substituted, the stress and strain parameters of each floor are evaluated, and whether the structure has cracks or aging is determined, specifically including: Extract features from the data in the monitoring database to obtain the basic features of stress and strain, analyze the time series features of the data, and identify trend changes; Establish a 3D model of the building, divide the building into different floors, and establish an independent structural analysis model for each floor; Calculate stress and strain for each floor, obtain specific stress and strain distribution, and set the boundary conditions and load conditions of each floor in the structural analysis model accordingly; Based on the stress analysis results of each floor, determine whether there is a risk of cracking on each floor, and analyze the impact of material aging on structural safety.

[0008] As a further solution of the present invention, the determination of whether there is a risk of cracking on each floor and the analysis of the influence of the degree of material aging on the structural safety are as follows: ; in, is the stress intensity factor, is the applied stress, is the length of the crack, combined with the fracture toughness of the material ,judge and If , there is a risk of cracking; ; in, For time Material properties when For initial performance, is the decay rate constant.

[0009] As a further solution of the present invention, the independent risk assessment model is constructed, and based on the analysis results of the structural analysis model, the independent potential collapse situation of each floor is simulated, and the specific collapse location and possible collapse mode are determined by simulation, which specifically includes: An independent risk assessment model is established to calculate the independent collapse risk value of each floor. The independent collapse risk value is the collapse risk value of the floor without considering the influencing factors of other floors: ; in, For floor The independent collapse risk value is is the stress level, To collapse potential, and is the weight coefficient; In the established three-dimensional building model, the limit state theory is used to analyze the bearing capacity of each component, and the failure modes that may lead to collapse are identified based on stress and strain data.

[0010] As a further solution of the present invention, the simulation of the mass distribution and force transmission path of the collapsed floor, the calculation of the magnitude and point of action of the collapse force after the collapsed floor collapses, and the evaluation of the force conditions of the adjacent floors during the collapse process specifically include: Establish a dynamic model and perform collapse simulation: Simulate the collapse point and volume of each floor after failure, and calculate the center of gravity and force application point of the collapsed floor; Identify the connection points between floors, establish the force transmission path between adjacent floors, analyze the forces on adjacent floors, evaluate their tolerable limits, and determine the safety of adjacent floors under the action of collapse forces; Calculate the safety factor of adjacent floors under the action of collapse force: ; Among them, compressive strength is the design strength of the material, and actual stress is the load actually applied to the floor; Based on the safety factor and stress conditions of the adjacent floors, assess whether the adjacent floors are at risk of collapse due to the forces applied from above.

[0011] As a further solution of the present invention, the dynamic model is established to perform collapse simulation, wherein the dynamic model formula is: ; in, is the mass matrix, is the damping matrix, is the stiffness matrix, is the external load, is the displacement vector, which represents the displacement of each node in the structure relative to the initial position; is the velocity vector, which indicates the velocity change of each node in the structure; is the acceleration vector, which represents the acceleration of each node in the structure.

[0012] As a further solution of the present invention, the simulation of the collapse point and collapse volume of each floor after failure, and the calculation of the center of gravity and the point of force application of the collapsed floor, specifically includes: Determine the mass corresponding to the collapsed volume: ; in, is the collapse mass, is the collapsed volume, is the material density; Calculation of collapse force: ; in, The force generated by the collapse, is the collapse mass, is the acceleration due to gravity; As a further solution of the present invention, the comprehensive analysis results are combined with the collapse risk of each floor to calculate the overall safety factor, which specifically includes: Normalize the safety factor of each floor and convert the safety factor into a ratio to the maximum safety factor: ; Assign a risk weight to each floor : ; Calculate the safety factor of the entire building: ; in, The total number of floors.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects: This method does not only evaluate a single floor, but also comprehensively considers the mutual influence between floors. This design overcomes the limitations of traditional analysis methods and can clearly identify which floors have potential collapse risks and how these risks affect adjacent floors. This holistic analysis can more comprehensively reflect the real risks that a building may face after a disaster, avoiding misjudgments caused by local analysis.

[0014] The method constructs an independent risk assessment model to simulate the collapse of each floor, making the analysis of potential collapse floors more in-depth. The simulation not only provides the collapse location and possible collapse mode, but also predicts the force exerted on the floor below after the collapse. This process provides a scientific basis for the safety assessment of adjacent floors, enabling the monitoring system to comprehensively evaluate the overall safety of the building.

[0015] By calculating the overall safety factor, the risk information of each floor can be effectively integrated to dynamically reflect the safety status of the building under specific circumstances. This comprehensive assessment can not only update the safety factor in real time, but also provide strong support for emergency management and decision-making, so that corresponding response measures can be quickly formulated when potential dangers occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A structural block diagram of a building structure health monitoring and early warning system provided by an embodiment of the present invention; Figure 2 A flow chart of a building structure health monitoring and early warning method provided by an embodiment of the present invention; Figure 3 A flowchart for evaluating the stress and strain parameters of each floor and determining whether the structure has cracks or aging provided by an embodiment of the present invention; Figure 4 A flowchart for simulating the independent potential collapse of each floor provided in an embodiment of the present invention, and determining the specific collapse location and possible collapse mode through simulation; Figure 5 A flow chart for simulating the mass distribution and force transmission path of a collapsed floor, calculating the magnitude and point of action of the collapse force after the collapsed floor collapses, and evaluating the force conditions of adjacent floors during the collapse process provided by an embodiment of the present invention; Figure 6 A flowchart of calculating the overall safety factor based on the comprehensive analysis results provided by the embodiment of the present invention and the collapse risk of each floor. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Figure 1 A structural block diagram of a building structure health monitoring and early warning system provided by an embodiment of the present invention, such as Figure 1 As shown, the system comprises: The data collection and classification module 100 is used to automatically collect sensor data, establish a monitoring database, and classify the collected data using floors as labels; The structural analysis and evaluation module 200 is used to establish a structural analysis model, substitute the data corresponding to different floors, evaluate the stress and strain parameters of each floor, and determine whether the structure has cracks or aging; An independent risk assessment module 300 is used to construct an independent risk assessment model, and based on the analysis results of the structural analysis model, simulate the independent potential collapse of each floor, and determine the specific collapse location and possible collapse mode through simulation; The collapse dynamic analysis module 400 is used to simulate the mass distribution and force transmission path of the collapsed floor, calculate the magnitude and point of action of the collapse force after the collapsed floor collapses, evaluate the force conditions of the adjacent floors during the collapse process, and determine whether they can support the impact of the collapse above; The comprehensive safety analysis module 500 is used to comprehensively analyze the results and calculate the overall safety factor in combination with the collapse risk of each floor.

[0022] Figure 2 A flow chart of a building structure health monitoring and early warning method provided by an embodiment of the present invention, such as Figure 2 As shown, the method includes: S100, automatically collects sensor data and establishes a monitoring database, classifying the collected data by floor as a label; S200, establish a structural analysis model, substitute the data corresponding to different floors, evaluate the stress and strain parameters of each floor, and determine whether the structure has cracks or aging; In this step, the stress and strain characteristics of each floor are extracted through sensor data, and the basic characteristics of the data are obtained by using statistical methods such as mean, variance, peak, etc. At the same time, the monitoring data is analyzed in time series to identify the trend changes of the data and determine whether there are abnormal fluctuations. For example, the data is smoothed and potential trends are discovered by using methods such as sliding average and exponential smoothing. Next, the three-dimensional model of the building is divided into multiple floors, and a structural analysis model is established for each floor. This method can more accurately reflect the stress conditions and potential risks of each floor. Then, according to the actual situation of each floor, different boundary conditions and loads are set, and the finite element analysis method is used to obtain the stress and strain distribution of each floor. After calculating the stress and strain, the stress intensity factor and the fracture toughness of the material are used to determine whether there is a risk of cracking in each floor. Finally, the material aging model is used to analyze the changes in material properties over time, and the safety of each floor is evaluated by combining the material aging degree with the stress analysis results, and the impact of material aging on the structure is determined.

[0023] By analyzing each floor independently, specific potential safety hazards can be clearly identified, rather than relying solely on the assessment of the overall structure. Combining real-time monitoring with dynamic analysis can promptly detect trend changes, achieve early warning, and reduce the risk of accidents. In addition, detailed data-based analysis results are provided to provide a scientific basis for structural reinforcement and maintenance decisions, thereby improving the safety of the building. Independent assessments of risks at different levels can effectively respond to chain reactions caused by local collapse and improve the overall building's resistance.

[0024] like Figure 3 As shown, the structural analysis model is established, the data corresponding to different floors are substituted, the stress and strain parameters of each floor are evaluated, and whether the structure has cracks or aging is determined, specifically including: S210, extracting features from the data in the monitoring database, obtaining basic features of stress and strain, and analyzing time series features of the data to identify trend changes; S220, establishing a three-dimensional model of the building, dividing the building into different floors, and establishing an independent structural analysis model for each floor; S230, performing stress and strain calculations on each floor to obtain specific stress and strain distributions, and accordingly setting boundary conditions and load conditions of the floor in a structural analysis model of each floor; S240, based on the stress analysis results of each floor, determines whether there is a risk of cracking on each floor and analyzes the impact of material aging on structural safety.

[0025] In the embodiment of the present invention, the determination of whether there is a risk of cracking on each floor and the analysis of the influence of the degree of material aging on the structural safety are specifically: ; in, is the stress intensity factor, is the applied stress, is the length of the crack, combined with the fracture toughness of the material ,judge and If , there is a risk of cracking; ; in, For time Material properties when For initial performance, is the decay rate constant.

[0026] S300, construct an independent risk assessment model, and based on the analysis results of the structural analysis model, simulate the independent potential collapse of each floor, and determine the specific collapse location and possible collapse mode through simulation; This step focuses on calculating the independent collapse risk value of each floor, where the risk value not only takes into account the deadweight and load factors of the floor, but also introduces stress level and collapse potential for comprehensive evaluation. In the formula, and are weight coefficients, reflecting the impact of stress level and collapse potential on risk assessment. In the three-dimensional model of the building, this process uses the limit state theory to analyze the bearing capacity of each floor and identify the key factors that may cause collapse based on stress and strain data.

[0027] The significant advantage of this step is that by independently analyzing the collapse risk of each floor, potential risk points can be systematically identified, rather than relying solely on the assessment of the overall structure. Such an independent assessment can effectively avoid the chain reaction caused by the collapse of a certain floor, so that even if the adjacent floors are not currently at risk, their changes under potential risks can still be predicted. In addition, based on more accurate risk assessments, decision makers can take more effective preventive measures to improve the safety of the overall building. This method can not only detect potential problems in a timely manner, but also help to formulate scientific maintenance and reinforcement plans to ensure the stability and safety of the building when subjected to external forces.

[0028] like Figure 4 As shown, the independent risk assessment model is constructed, and based on the analysis results of the structural analysis model, the independent potential collapse of each floor is simulated, and the specific collapse location and possible collapse mode are determined through simulation, specifically including: S310, establishing an independent risk assessment model to calculate the independent collapse risk value of each floor, where the independent collapse risk value is the collapse risk value of the floor without considering the influencing factors of other floors: ; in, For floor The independent collapse risk value is is the stress level, To collapse potential, and is the weight coefficient; S320, in the established three-dimensional building model, the limit state theory is used to analyze the bearing capacity of each component, and based on the stress and strain data, the failure mode that may lead to collapse is identified.

[0029] S400 simulates the mass distribution and force transmission path of the collapsed floor, calculates the magnitude and point of action of the collapse force after the collapsed floor collapses, evaluates the force conditions of the adjacent floors during the collapse process, and determines whether they can support the impact of the collapse above; like Figure 5 As shown, the method of simulating the mass distribution of the collapsed floor and the force transmission path, calculating the magnitude and point of action of the collapse force after the collapsed floor collapses, and evaluating the force conditions of the adjacent floors during the collapse process specifically includes: S410, establish a dynamic model and perform collapse simulation: S420, simulating the collapse point and collapse volume of each floor after failure, and calculating the center of gravity and the point of force application of the collapsed floor; S430, identifying the connection points between floors, establishing the force transmission paths of adjacent floors, analyzing the forces on adjacent floors, and evaluating the limits they can withstand, and determining the safety of adjacent floors under the action of collapse forces; S440, calculate the safety factor of adjacent floors under the action of collapse force: ; Among them, compressive strength is the design strength of the material, and actual stress is the load actually applied to the floor; S450, based on the safety factor and stress conditions of the adjacent floors, assess whether the adjacent floors are at risk of collapse due to the force applied from above.

[0030] As a further solution of the present invention, the dynamic model is established to perform collapse simulation, wherein the dynamic model formula is: ; in, is the mass matrix, is the damping matrix, is the stiffness matrix, is the external load, is the displacement vector, which represents the displacement of each node in the structure relative to the initial position; is the velocity vector, which indicates the velocity change of each node in the structure; is the acceleration vector, which represents the acceleration of each node in the structure.

[0031] As a further solution of the present invention, the simulation of the collapse point and collapse volume of each floor after failure, and the calculation of the center of gravity and the point of force application of the collapsed floor, specifically includes: Determine the mass corresponding to the collapsed volume: ; in, is the collapse mass, is the collapsed volume, is the material density; Calculation of collapse force: ; in, The force generated by the collapse, is the collapse mass, is the acceleration due to gravity; The core task of this step is to establish a dynamic dynamic model to simulate the collapse process of the building when it encounters external forces or fails. This process not only pays attention to the structural characteristics of the building, but also comprehensively considers the dynamic behavior of each floor when it collapses. Through an accurate model, the collapse point and volume of each floor can be identified, so as to judge the impact on the floors below.

[0032] On this basis, the connection points between floors are analyzed, the force transmission paths of adjacent floors are established, and the stress conditions of adjacent floors under the action of collapse forces are evaluated. Specifically, by calculating the safety factor of adjacent floors under the action of collapse forces, it is determined whether the adjacent floors can withstand the force applied from above. If the calculated safety factor is lower than a certain threshold, it can be considered that there is a risk of collapse of the adjacent floors.

[0033] The model also takes into account the connection points between floors and the transmission paths of forces, allowing us to gain a deeper understanding of how the floors interact with each other in the event of a collapse.

[0034] By simulating the stress conditions of adjacent floors, the safety factor of these floors can be effectively evaluated after the upper floors collapse. This analysis not only helps identify floors that are currently at risk of collapse, but also predicts whether other floors are likely to collapse due to additional loads if a specific floor fails. This forward-looking assessment provides important information support for building safety maintenance and emergency response, allowing emergency management teams to take quick measures to reduce risks and protect life and property.

[0035] By building a dynamic model and conducting detailed collapse simulations, we can conduct an in-depth analysis of the collapse behavior of each floor and identify key locations and patterns that may occur in actual collapse events. This analysis not only improves the understanding of the overall safety of the building, but also provides a scientific basis for post-disaster assessment and emergency response. In addition, by clarifying the mass distribution of the collapsed body and the force transmission path, the stress conditions of adjacent floors during the collapse process can be effectively predicted, so as to formulate more scientific and reasonable reinforcement and maintenance strategies to reduce potential risks.

[0036] S500, comprehensively analyzes the results and combines the collapse risk of each floor to calculate the overall safety factor.

[0037] This step normalizes the safety factor of each floor to establish a unified safety factor standard. The purpose of this process is to eliminate data deviations caused by different floor characteristics so that the safety factors of each floor can be directly compared and analyzed. Based on the ratio of the safety factor of each floor to the maximum safety factor of all floors, all data can be evaluated on a relatively unified basis.

[0038] Next, a risk weight is assigned to each floor, and the weight setting is dynamically adjusted according to the safety factor of each floor. By setting different interval conditions, the actual collapse risk of each floor can be more accurately reflected.

[0039] Finally, the overall building safety factor is calculated by weighted summing the normalized safety factor of each floor and the corresponding risk weight. This comprehensive approach can fully reflect the safety status of the entire building under specific conditions and ensure that the actual impact of each floor is taken into account during the assessment.

[0040] The significant advantage of this step is that it not only provides a comprehensive risk assessment method, but also makes the entire analysis process more flexible and adaptable by dynamically adjusting risk weights. In this way, it is possible to effectively identify whether an originally safe floor will be affected by the collapse of an adjacent floor in a potential collapse event. This early warning mechanism provides important guidance for building safety management, ensuring that necessary preventive measures can be taken in time before an actual disaster occurs, thereby minimizing losses and risks.

[0041] like Figure 6 As shown, the comprehensive analysis results, combined with the collapse risk of each floor, calculate the overall safety factor, specifically including: S510, normalize the safety factor of each floor and convert the safety factor into a ratio to the maximum safety factor: ; S520, assign a risk weight to each floor : ; S530, calculate the safety factor of the entire building: ; in, The total number of floors.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A building structure health monitoring and early warning system, characterized in that: The system comprises: The data collection and classification module is used to automatically collect sensor data, establish a monitoring database, and classify the collected data using floors as labels; The structural analysis and evaluation module is used to establish a structural analysis model, substitute the data corresponding to different floors, evaluate the stress and strain parameters of each floor, and determine whether the structure has cracks or aging; Independent risk assessment module, used to build an independent risk assessment model, and based on the analysis results of the structural analysis model, simulate the independent potential collapse of each floor, and determine the specific collapse location and possible collapse mode through simulation; The collapse dynamic analysis module is used to simulate the mass distribution and force transmission path of the collapsed floor, calculate the magnitude and point of action of the collapse force after the collapsed floor collapses, evaluate the force conditions of the adjacent floors during the collapse process, and determine whether they can support the impact of the collapse above; The comprehensive safety analysis module is used to comprehensively analyze the results and calculate the overall safety factor based on the collapse risk of each floor.

2. A building structure health monitoring and early warning method, characterized in that: The method comprises: Automatically collect sensor data, establish a monitoring database, and classify the collected data by floor; Establish a structural analysis model, substitute the data corresponding to different floors, evaluate the stress and strain parameters of each floor, and determine whether the structure has cracks or aging; Construct an independent risk assessment model and simulate the independent potential collapse of each floor based on the analysis results of the structural analysis model, and determine the specific collapse location and possible collapse mode through simulation; Simulate the mass distribution and force transmission path of the collapsed floor, calculate the magnitude and point of action of the collapse force after the collapsed floor collapses, evaluate the force conditions of the adjacent floors during the collapse process, and determine whether they can support the impact of the collapse above; The overall safety factor is calculated based on the comprehensive analysis results and the collapse risk of each floor.

3. The method according to claim 2, characterized in that The structural analysis model is established, the data corresponding to different floors are substituted, the stress and strain parameters of each floor are evaluated, and whether the structure has cracks or aging is determined, specifically including: Extract features from the data in the monitoring database to obtain the basic features of stress and strain, analyze the time series features of the data, and identify trend changes; Establish a 3D model of the building, divide the building into different floors, and establish an independent structural analysis model for each floor; Calculate stress and strain for each floor, obtain specific stress and strain distribution, and set the boundary conditions and load conditions of each floor in the structural analysis model accordingly; Based on the stress analysis results of each floor, determine whether there is a risk of cracking on each floor, and analyze the impact of material aging on structural safety.

4. The method according to claim 3, characterized in that The determination of whether there is a risk of cracking on each floor and analysis of the impact of material aging on structural safety are as follows: ； in, is the stress intensity factor, is the applied stress, is the length of the crack, combined with the fracture toughness of the material ,judge and If , there is a risk of cracking; ； in, For time Material properties when For initial performance, is the decay rate constant.

5. The method according to claim 3, characterized in that: The independent risk assessment model is constructed, and based on the analysis results of the structural analysis model, the independent potential collapse of each floor is simulated, and the specific collapse location and possible collapse mode are determined through simulation, specifically including: An independent risk assessment model is established to calculate the independent collapse risk value of each floor. The independent collapse risk value is the collapse risk value of the floor without considering the influencing factors of other floors: ； in, For floor The independent collapse risk value is is the stress level, To collapse potential, and is the weight coefficient; In the established three-dimensional building model, the limit state theory is used to analyze the bearing capacity of each component, and the failure modes that may lead to collapse are identified based on stress and strain data.

6. The method according to claim 5, characterized in that The simulation of the mass distribution and force transmission path of the collapsed floor, the calculation of the magnitude and point of action of the collapse force after the collapsed floor collapses, and the evaluation of the force conditions of the adjacent floors during the collapse process specifically include: Establish a dynamic model and conduct collapse simulation: Simulate the collapse point and volume of each floor after failure, and calculate the center of gravity and force application point of the collapsed floor; Identify the connection points between floors, establish the force transmission path between adjacent floors, analyze the forces on adjacent floors, evaluate their tolerable limits, and determine the safety of adjacent floors under the action of collapse forces; Calculate the safety factor of adjacent floors under the action of collapse force: ； Among them, compressive strength is the design strength of the material, and actual stress is the load actually applied to the floor; Based on the safety factor and stress conditions of the adjacent floors, assess whether the adjacent floors are at risk of collapse due to the forces applied from above.

7. The method according to claim 6, characterized in that The dynamic model is established to perform collapse simulation, wherein the dynamic model formula is: ； in, is the mass matrix, is the damping matrix, is the stiffness matrix, is the external load, is the displacement vector, which represents the displacement of each node in the structure relative to the initial position; is the velocity vector, which indicates the velocity change of each node in the structure; is the acceleration vector, which represents the acceleration of each node in the structure.

8. The method according to claim 6, characterized in that The simulation of the collapse point and collapse volume of each floor after failure and the calculation of the center of gravity and the point of force application of the collapsed floor specifically include: Determine the mass corresponding to the collapsed volume: ； in, is the collapse mass, is the collapsed volume, is the material density; Calculation of collapse force: ； in, The force generated by the collapse, is the collapse mass, is the acceleration due to gravity.

9. The method according to claim 6, characterized in that The above comprehensive analysis results, combined with the collapse risk of each floor, calculate the overall safety factor, including: Normalize the safety factor of each floor and convert the safety factor into a ratio to the maximum safety factor: ； Assign a risk weight to each floor : ； Calculate the safety factor of the entire building: ； in, The total number of floors.

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