Building damage assessment method and device based on contribution factor method

Abstract

The invention belongs to the field of building damage assessment, and particularly relates to a building damage assessment method and device based on a contribution factor method. The method comprises the following steps: S1, determining a burst point position of a thrown object in a building according to a building model and thrown object parameters; s2, determining an overpressure peak value acting on a building component near the explosion point position after the throwing object explodes at the explosion point position; s3, determining the damage degree of each component of the building according to the overpressure peak value; s4, the rigidity loss rate of the component serves as a contribution factor of the component to the overall structure, and the damage index of the component is calculated; and S5, superposing the weight damage indexes of all the components to obtain a damage value of the whole building. According to the invention, rapid and accurate evaluation of the damage state of the key building is realized.

Description

Technical Field

[0001] The present application relates to the field of building damage assessment, and in particular to a building damage assessment method and device based on a contribution factor method. Background Art

[0002] Rapidly assessing the comprehensive damage extent of critical buildings after a strike is crucial for quickly evaluating strike results, developing secondary strike plans, and ensuring personnel safety. Traditional building damage effectiveness assessment methods, based on empirical or definitional analysis, rely heavily on the assessor's previous damage assessment experience and fail to meet the demands of modern damage assessment. Summary of the Invention

[0003] In order to solve the above problems, the present application provides a building damage assessment method and device based on the contribution factor method, which quantifies the response results of different structures to impact based on the building structural model, comprehensively considers the overall structural layout, material properties and external load influence of the building, and realizes a systematic assessment of the damage status of the building.

[0004] In a first aspect, the present application provides a building damage assessment method based on a contribution factor method, which mainly includes:

[0005] Step S1: determining the explosion point of the object in the building based on the building model and the object parameters;

[0006] Step S2: determining the peak overpressure value exerted on the building components near the explosion point after the projectile explodes at the explosion point;

[0007] Step S3: determining the damage degree of each component of the building according to the overpressure peak value;

[0008] Step S4: Calculate the damage index of the component by taking the stiffness loss rate of the component as the contribution factor of the component to the overall structure;

[0009] Step S5: Superimpose the weighted damage indices of all components to obtain the damage value of the entire building.

[0010] Preferably, step S1 further comprises:

[0011] Step S11: Determine the landing point of the object and its initial velocity at the landing point based on the trajectory of the object and the location and structural parameters of the ground building;

[0012] Step S12: When the landing point is a wall of a building, determining whether the projectile can penetrate the wall based on the initial velocity and the minimum penetration velocity of the projectile, and calculating the residual velocity after penetrating the wall;

[0013] Step S13: Continue to judge whether the projectile can penetrate the next wall according to the remaining speed until the final explosion point is determined.

[0014] Preferably, step S2 further comprises:

[0015] Step S21, determining the initial overpressure of the projectile on the building components near the explosion point;

[0016] Step S22: correcting the initial overpressure according to the physical property that the overpressure value decays with distance to obtain an attenuated overpressure;

[0017] Step S23: performing overpressure enhancement on the attenuated overpressure according to the reflected overpressure characteristics to obtain an initial reflected overpressure;

[0018] Step S24: performing multiple attenuation iterative calculations on the initial reflected overpressure to obtain a final overpressure peak value.

[0019] Preferably, in step S4, the damage index WDI is calculated by the following formula: 构件 :

[0020] WDI 构件 =P 构件 ×W 构件 ×I 构件 ;

[0021] Among them, P 构件 is the damage threshold corresponding to the component damage degree, W 构件 is the component weight, I 构件 is the component contribution factor.

[0022] Preferably, the method further comprises:

[0023] Step S6: Based on the comparison result of the damage target level and the damage value of the entire building, the damage probability of the building is calculated by statistical method.

[0024] The second aspect of the present application provides a building damage assessment device based on a contribution factor method, which mainly includes:

[0025] The explosion point location determination module is used to determine the explosion point location of the drop in the building based on the building model and the drop parameters;

[0026] An overpressure peak calculation module is used to determine the overpressure peak value exerted on the building components near the explosion point after the projectile explodes at the explosion point;

[0027] a component damage degree determination module, configured to determine the damage degree of each component of the building according to the overpressure peak value;

[0028] Component damage index calculation module, used to calculate the component damage index by taking the component stiffness loss rate as the component's contribution factor to the overall structure;

[0029] The damage value determination module is used to superimpose the weighted damage indices of all components to obtain the damage value of the entire building.

[0030] Preferably, the explosion point location determination module includes:

[0031] A landing point parameter calculation unit, configured to determine the landing point of the object and its initial velocity at the landing point based on the trajectory of the object and the position and structural parameters of the ground building;

[0032] a wall penetration determination unit for determining, when the landing point is a wall of a building, whether the projectile can penetrate the wall based on the initial velocity and the minimum penetration velocity of the projectile, and calculating the residual velocity after penetrating the wall;

[0033] The explosion point position calculation unit is used to continue to judge whether the projectile can penetrate the next wall according to the remaining speed until the explosion point position of the final explosion is determined.

[0034] Preferably, the overpressure peak value calculation module includes:

[0035] An initial overpressure calculation unit is used to determine the initial overpressure exerted by the projectile on the building components near the explosion point;

[0036] a decaying overpressure calculation unit, configured to correct the initial overpressure according to the physical property that the overpressure value decays with distance, to obtain the decayed overpressure;

[0037] an initial reflected overpressure calculation unit, configured to perform overpressure enhancement on the attenuated overpressure according to the reflected overpressure characteristics to obtain an initial reflected overpressure;

[0038] The overpressure peak value acquisition unit is used to perform multiple attenuation iterative calculations on the initial reflected overpressure to obtain a final overpressure peak value.

[0039] Preferably, in the component damage index calculation module, the damage index WDI is calculated by the following formula: 构件 :

[0040] WDI 构件 =P 构件 ×W 构件 ×I 构件 ;

[0041] Among them, P 构件 is the damage threshold corresponding to the component damage degree, W 构件 is the component weight, I构件 is the component contribution factor.

[0042] Preferably, the device further comprises:

[0043] The damage probability calculation module is used to calculate the damage probability of a building through statistical methods based on the comparison results of the damage target level and the damage value of the entire building.

[0044] This application achieves a rapid and accurate assessment of the damage status of key buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a flow chart of a preferred embodiment of the building damage assessment method based on the contribution factor method of the present application.

[0046] Figure 2 It is a simplified schematic diagram for determining the location of building walls and explosion points. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the implementation of this application will be described in more detail below in conjunction with the drawings in the implementation of this application. In the drawings, the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and should not be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in conjunction with the drawings.

[0048] The first aspect of the present application provides a building damage assessment method based on the contribution factor method, such as Figure 1 As shown, it mainly includes:

[0049] Step S1: determining the explosion point of the object in the building based on the building model and the object parameters;

[0050] Step S2: determining the peak overpressure value exerted on the building components near the explosion point after the projectile explodes at the explosion point;

[0051] Step S3: determining the damage degree of each component of the building according to the overpressure peak value;

[0052] Step S4: Calculate the damage index of the component by taking the stiffness loss rate of the component as the contribution factor of the component to the overall structure;

[0053] Step S5: Superimpose the weighted damage indices of all components to obtain the damage value of the entire building.

[0054] In step S1 of the present application, the explosion point location can be calculated based on pre-built simulation scene models. These simulation scene models include the current position of the aircraft, the environment it is in, the movement model of the dropped object, and the building model.

[0055] In some optional embodiments, step S1 further includes:

[0056] Step S11: Determine the landing point of the object and its initial velocity at the landing point based on the trajectory of the object and the location and structural parameters of the ground building;

[0057] Step S12: When the landing point is a wall of a building, determining whether the projectile can penetrate the wall based on the initial velocity and the minimum penetration velocity of the projectile, and calculating the residual velocity after penetrating the wall;

[0058] Step S13: Continue to judge whether the projectile can penetrate the next wall according to the remaining speed until the final explosion point is determined.

[0059] like Figure 2 As shown, first in step S11, the landing point of the projectile is determined. The landing point of the projectile refers to the first contact between the projectile and the ground or ground buildings after leaving the aircraft. This application mainly relates to the damage of ground buildings by projectiles. Here, the building is taken as the target, and it is assumed that the projectile is controlled to contact the building, and the contact point is the landing point. It should be noted that the target and the aiming point positions need to be described in the same coordinate system. The shooting range coordinate system is selected to describe the target and aiming point position coordinates. The projectile trajectory, building position and structural parameters are known. The final landing point of the projectile is determined by simulating the actual landing point of the projectile.

[0060] Then, in step S12, the coordinates of the explosion point are calculated based on the accurate building structural parameter information. Here, the minimum penetration velocity v required for the projectile to penetrate the concrete structure is calculated based on the Demar formula. b :

[0061]

[0062] Where K is the armor penetration coefficient, ranging from 2200 to 2600, with K = 2400 being commonly used; d is the diameter of the projectile; b is the thickness of the component. Since the projectile not only needs to penetrate the initial wall of the building but may also continue to penetrate other structures within the building, such as beams, which are collectively referred to as components here; m is the mass of the projectile; and α is the attitude angle of the projectile at the moment of impact.

[0063] If the penetration condition is met, the residual velocity v of the projectile after penetration is calculated based on the residual velocity calculation model. r :

[0064]

[0065] Among them, ρ p is the constructed penetration coefficient; v0 is the initial velocity of the droplet at the landing point; ρ T is the material density of the component; C T is the speed of sound in the component material; h is the thickness of the component.

[0066] Finally, in step S13, it is possible to repeatedly determine whether the object can continue to pass through the next component and the remaining speed after passing through the next component according to the remaining speed until the explosion condition is met, and calculate the explosion point coordinates at the time of the explosion.

[0067] The projectile setting here has an automatic control function. The explosion conditions include two situations. One is that after the projectile penetrates the building and reaches the specified number of floors, that is, it passes through the specified number of components, and its explosion is automatically controlled. The other situation is that the projectile's penetration ability is insufficient and it fails to reach the specified number of floors. The remaining speed drops to the specified explosion speed. The following are explanations of each.

[0068] For the first case, it is assumed that the direction of the projectile remains unchanged during the high-speed impact process, and the penetration depth of each room is d n ,like Figure 2 As shown in the figure, the posture of the dropped object is the azimuth angle β and the pitch angle γ, then the coordinate position of the explosion point can be calculated by accumulation:

[0069]

[0070] Among them, P0 (x0, y0, z0) is the landing point of the object determined in step S11.

[0071] For the second case, after passing through the last component, the object moves with constant deceleration inside the building, and the deceleration is Then the displacement s can be calculated as:

[0072]

[0073] Among them, v t The speed at which the explosion is set.

[0074] Then transform the calculation formula of the first case to obtain the following formula:

[0075]

[0076] After the explosion point is determined, the force exerted by the projectile on the surrounding components after the explosion at the explosion point can be calculated in step S2.

[0077] In some optional embodiments, step S2 further includes:

[0078] Step S21, determining the initial overpressure of the projectile on the building components near the explosion point;

[0079] Step S22: correcting the initial overpressure according to the physical property that the overpressure value decays with distance to obtain an attenuated overpressure;

[0080] Step S23: performing overpressure enhancement on the attenuated overpressure according to the reflected overpressure characteristics to obtain an initial reflected overpressure;

[0081] Step S24: performing multiple attenuation iterative calculations on the initial reflected overpressure to obtain a final overpressure peak value.

[0082] In this embodiment, first in step S21, the initial overpressure P is calculated. i :

[0083]

[0084] Where Q is the explosion energy, and r is the distance between the explosion point and the calculation point. The calculation point here refers to the nodes in the building to be calculated. The coordinates of the calculation nodes are given by the building model, such as the coordinates of the wall nodes near the explosion point or the coordinates of key components such as beams in the room. The destructive capacity of the explosion of the object on the component is calculated from this.

[0085] Then, in step S22, based on the physical property that the overpressure value decays with distance, a correction coefficient k is introduced to calculate the overpressure P after decay:

[0086] P=P i ·e -kr .

[0087] Where k is the attenuation coefficient, which is related to the explosion environment and medium characteristics.

[0088] Then, in step S23, the overpressure enhancement result after the shock wave encounters the rigid surface is calculated based on the reflected overpressure characteristics, that is, the initial reflected overpressure P ref :

[0089]

[0090] Where Z is the shock wave impedance.

[0091] Finally, in step S24, considering that the shock wave has multiple reflections in the internal structure of the building, the overpressure calculation of multiple reflections is achieved through iterative calculation:

[0092]

[0093] Where, P ref,n-1 is the reflected overpressure after the last iteration; r n is the distance in the current iteration. At the same time, set a threshold U or maximum number of iterations N max As the termination condition. When the overpressure change is less than U or the number of iterations reaches N max When , the iteration stops and the overpressure P of the last iteration is output n As the final overpressure peak P peak .

[0094] After obtaining the final overpressure peak, the damage level of each building component can be determined in step S3. Taking a certain building structure as an example, the damage level of each building component is determined. The overpressure thresholds for different damage levels of concrete structural components are shown in Table 1 below.

[0095] Table 1 Overpressure thresholds of concrete structural components with different damage degrees

[0096]

[0097] Then, in step S4, the damage index of the component needs to be calculated. In some optional embodiments, in step S4, the damage index WDI is calculated by the following formula 构件 :

[0098] WDI 构件 =P 构件 ×W 构件 ×I 构件 ;

[0099] Among them, P 构件 is the damage threshold corresponding to the component damage degree, W 构件 is the component weight, I 构件 is the component contribution factor.

[0100] First, let's explain the damage threshold. The damage threshold is obtained by querying Table 1. When the final overpressure peak is below the lower limit, the lower limit is used as the damage threshold. When it exceeds the upper limit, the upper limit is used as the damage threshold. When it is between the upper and lower limits, the final overpressure peak is used as the damage threshold. For example, assume that for door and window glass, the final overpressure peak calculated in step S3 is 14. According to Table 1, the damage level of the door and window glass is completely intact, and the damage threshold is 15. Suppose that the final overpressure peak is 30. According to Table 1, the damage level of the door and window glass is completely destroyed, and the damage threshold is 26. Suppose that the final overpressure peak is 20. According to Table 1, the damage level of the door and window glass is partially destroyed, and the damage threshold is 20.

[0101] The component weight is determined according to the importance of each component in the overall structure. For example, the weight of door and window glass is 0.1, the weight of light structures such as infill walls is 0.2, the weight of reinforced concrete slabs is 0.3, and the weight of reinforced concrete columns is 0.4.

[0102] For the component contribution factor, the building component contribution factor is generally calculated using the generalized structural stiffness ratio method. For a structural system, the work done by external forces such as destructive impact on the system is equal to the increase in structural strain energy. Only considering the building material in the elastic stage, when the load distribution of the building components is known, the structural displacement distribution can be determined. Generalized structural stiffness K stru for:

[0103] K stru =F stru / D stru .

[0104] Where, F stru is the load distribution on the structure; D stru is the displacement distribution on the structural system.

[0105] Under known loads, the contribution of a component to the structural stiffness of a building is a quantitative indicator with clear physical meaning. The generalized structural stiffness loss rate caused by building damage is used as an indicator of the component's contribution to the overall structure. The larger the I value, the greater the impact of the component on the overall structure:

[0106]

[0107] Where K stru，0 K is the initial stiffness of the overall structure before the impact; stru，f It is the effective stiffness of the overall structure after the impact.

[0108] Finally, in step S5, the weighted damage indices of all components are superimposed to obtain the damage value of the entire building structure, and then the damage level of the entire building structure is determined according to the building target damage criterion, as shown in Table 2 below.

[0109] Table 2 Damage criteria for building targets in overall damage mode

[0110]

[0111] In some optional embodiments, the method further comprises:

[0112] Step S6: Based on the comparison result of the damage target level and the damage value of the entire building, the damage probability of the building is calculated by statistical method.

[0113] After obtaining the damage status of the entire building, the damage probability of the building can be further calculated based on statistics. In this embodiment, if severe is defined as the target achieved by this damage, by setting N sample sizes, the severe sample size n is obtained, and the building damage probability E = n / N.

[0114] In an alternative implementation, the damage volume can also be calculated. Let the distance from the severely damaged component to the explosion point be r, and select r max , we can get r max The number of rooms contained in the damage area is m, and the damage volume V = mv is calculated by summing the room volumes. i .

[0115] In an alternative implementation, the probability of damage to key rooms can also be calculated. The number of rooms where key equipment involved in the damaged room is located is counted as N key and compare it with the total number of damaged rooms N damage The ratio of the two represents the probability of damage to the critical room E key =N key / N damage .

[0116] This application proposes a more scientific and accurate method for dynamic damage assessment of buildings, avoiding the limitations and subjectivity of traditional numerical calculations and empirical judgment methods. It can provide a universal assessment calculation method in application areas such as air-based damage assessment, secondary strike judgment, and disaster damage assessment. Based on this method, by establishing a complete and accurate target building structure model, projectile damage model, and projectile motion model, a real-time and rapid assessment of the target building can be achieved, effectively improving the scientific nature and rapid response capabilities of the assessment capability for the entire process of executing tasks. It is suitable for air-based surface strike simulation verification assessment or partial conversion application.

[0117] The second aspect of the present application provides a building damage assessment device based on a contribution factor method corresponding to the above method, which mainly includes:

[0118] The explosion point location determination module is used to determine the explosion point location of the drop in the building based on the building model and the drop parameters;

[0119] An overpressure peak calculation module is used to determine the overpressure peak value exerted on the building components near the explosion point after the projectile explodes at the explosion point;

[0120] a component damage degree determination module, configured to determine the damage degree of each component of the building according to the overpressure peak value;

[0121] Component damage index calculation module, used to calculate the component damage index by taking the component stiffness loss rate as the component's contribution factor to the overall structure;

[0122] The damage value determination module is used to superimpose the weighted damage indices of all components to obtain the damage value of the entire building.

[0123] In some optional embodiments, the explosion point location determination module includes:

[0124] A landing point parameter calculation unit, configured to determine the landing point of the object and its initial velocity at the landing point based on the trajectory of the object and the position and structural parameters of the ground building;

[0125] a wall penetration determination unit for determining, when the landing point is a wall of a building, whether the projectile can penetrate the wall based on the initial velocity and the minimum penetration velocity of the projectile, and calculating the residual velocity after penetrating the wall;

[0126] The explosion point position calculation unit is used to continue to judge whether the projectile can penetrate the next wall according to the remaining speed until the explosion point position of the final explosion is determined.

[0127] In some optional implementations, the overpressure peak calculation module includes:

[0128] An initial overpressure calculation unit is used to determine the initial overpressure exerted by the projectile on the building components near the explosion point;

[0129] a decaying overpressure calculation unit, configured to correct the initial overpressure according to the physical property that the overpressure value decays with distance, to obtain the decayed overpressure;

[0130] an initial reflected overpressure calculation unit, configured to perform overpressure enhancement on the attenuated overpressure according to the reflected overpressure characteristics to obtain an initial reflected overpressure;

[0131] The overpressure peak value acquisition unit is used to perform multiple attenuation iterative calculations on the initial reflected overpressure to obtain a final overpressure peak value.

[0132] In some optional embodiments, in the component damage index calculation module, the damage index WDI is calculated by the following formula: 构件 :

[0133] WDI 构件 =P 构件 ×W 构件 ×I 构件 ;

[0134] Among them, P 构件 is the damage threshold corresponding to the component damage degree, W 构件 is the component weight, I 构件 is the component contribution factor.

[0135] In some optional embodiments, the device further comprises:

[0136] The damage probability calculation module is used to calculate the damage probability of a building through statistical methods based on the comparison results of the damage target level and the damage value of the entire building.

[0137] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A building damage assessment method based on contribution factor method, characterized in that: include: Step S1: determining the explosion point of the object in the building based on the building model and the object parameters; Step S2: determining the peak overpressure value exerted on the building components near the explosion point after the projectile explodes at the explosion point; Step S3: determining the damage degree of each component of the building according to the overpressure peak value; Step S4: Calculate the damage index of the component by taking the stiffness loss rate of the component as the contribution factor of the component to the overall structure; Step S5: Superimpose the weighted damage indices of all components to obtain the damage value of the entire building.

2. The building damage assessment method based on the contribution factor method according to claim 1, characterized in that: Step S1 further comprises: Step S11: Determine the landing point of the object and its initial velocity at the landing point based on the trajectory of the object and the location and structural parameters of the ground building; Step S12: When the landing point is a wall of a building, determining whether the projectile can penetrate the wall based on the initial velocity and the minimum penetration velocity of the projectile, and calculating the residual velocity after penetrating the wall; Step S13: Continue to judge whether the projectile can penetrate the next wall according to the remaining speed until the final explosion point is determined.

3. The building damage assessment method based on the contribution factor method according to claim 1, characterized in that: Step S2 further comprises: Step S21, determining the initial overpressure of the projectile on the building components near the explosion point; Step S22: correcting the initial overpressure according to the physical property that the overpressure value decays with distance to obtain an attenuated overpressure; Step S23: performing overpressure enhancement on the attenuated overpressure according to the reflected overpressure characteristics to obtain an initial reflected overpressure; Step S24: performing multiple attenuation iterative calculations on the initial reflected overpressure to obtain a final overpressure peak value.

4. The building damage assessment method based on the contribution factor method according to claim 1, wherein: In step S4, the damage index WDI is calculated by the following formula: 构件 : WDI 构件 =P 构件 ×W 构件 ×I 构件 ; Among them, P 构件 is the damage threshold corresponding to the component damage degree, W 构件 is the component weight, I 构件 is the component contribution factor.

5. The building damage assessment method based on the contribution factor method according to claim 1, characterized in that: The method further comprises: Step S6: Based on the comparison result of the damage target level and the damage value of the entire building, the damage probability of the building is calculated by statistical method.

6. A building damage assessment device based on the contribution factor method, characterized in that: include: The explosion point location determination module is used to determine the explosion point location of the drop in the building based on the building model and the drop parameters; An overpressure peak calculation module is used to determine the overpressure peak value exerted on the building components near the explosion point after the projectile explodes at the explosion point; a component damage degree determination module, configured to determine the damage degree of each component of the building according to the overpressure peak value; Component damage index calculation module, used to calculate the component damage index by taking the component stiffness loss rate as the component's contribution factor to the overall structure; The damage value determination module is used to superimpose the weighted damage indices of all components to obtain the damage value of the entire building.

7. The building damage assessment device based on the contribution factor method according to claim 6, characterized in that: The explosion point location determination module includes: A landing point parameter calculation unit, configured to determine the landing point of the object and its initial velocity at the landing point based on the trajectory of the object and the position and structural parameters of the ground building; a wall penetration determination unit for determining, when the landing point is a wall of a building, whether the projectile can penetrate the wall based on the initial velocity and the minimum penetration velocity of the projectile, and calculating the residual velocity after penetrating the wall; The explosion point position calculation unit is used to continue to judge whether the projectile can penetrate the next wall according to the remaining speed until the explosion point position of the final explosion is determined.

8. The building damage assessment device based on the contribution factor method according to claim 6, characterized in that: The overpressure peak calculation module includes: An initial overpressure calculation unit is used to determine the initial overpressure exerted by the projectile on the building components near the explosion point; a decaying overpressure calculation unit, configured to correct the initial overpressure according to the physical property that the overpressure value decays with distance, to obtain the decayed overpressure; an initial reflected overpressure calculation unit, configured to perform overpressure enhancement on the attenuated overpressure according to the reflected overpressure characteristics to obtain an initial reflected overpressure; The overpressure peak value acquisition unit is used to perform multiple attenuation iterative calculations on the initial reflected overpressure to obtain a final overpressure peak value.

9. The building damage assessment device based on the contribution factor method according to claim 6, characterized in that: In the component damage index calculation module, the damage index WDI is calculated by the following formula: 构件 : WDI 构件 =P 构件 ×W 构件 ×I 构件 ; Among them, P 构件 is the damage threshold corresponding to the component damage degree, W 构件 is the component weight, I 构件 is the component contribution factor.

10. The building damage assessment device based on the contribution factor method according to claim 6, characterized in that: The device further comprises: The damage probability calculation module is used to calculate the damage probability of a building through statistical methods based on the comparison results of the damage target level and the damage value of the entire building.

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