CN109544387B

CN109544387B - Component-level building earthquake economic loss fine evaluation method

Info

Publication number: CN109544387B
Application number: CN201811320891.3A
Authority: CN
Inventors: 许镇; 张宗才; 张华振
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2018-11-07
Filing date: 2018-11-07
Publication date: 2021-04-06
Anticipated expiration: 2038-11-07
Also published as: CN109544387A

Abstract

The invention provides a construction earthquake economic loss fine evaluation method at a component level, and belongs to the technical field of earthquake engineering. The method comprises the steps of firstly, constructing a component earthquake damage evaluation module, evaluating the earthquake damage of each component according to a building information model and a vulnerability database through the component earthquake damage evaluation module, then constructing a loss evaluation module, and calculating the earthquake economic loss of each component and the whole building through the loss evaluation module according to the building information model, the vulnerability database and a restoration standard library; and finally, constructing a visualization module, and carrying out three-dimensional visualization display on the earthquake damage and the loss of the building through the visualization module. The method can accurately evaluate the loss to the component, provides specific component loss distribution, and provides important reference for building earthquake repair strategy or disaster prevention design.

Description

Component-level building earthquake economic loss fine evaluation method

Technical Field

The invention relates to the technical field of seismic engineering, in particular to a method for finely evaluating economic loss of a building earthquake at a component level.

Background

After years of development of building earthquake-resistant technology, the earthquake collapse resistance of buildings is improved remarkably at present, but many buildings are forced to be dismantled due to high post-earthquake repair cost. For example, in 2011, 22 months and 2 days, the earthquake occurs in New Zealand at Ri's level 6.2, and 70% of buildings after the earthquake have no repair value and are forced to be dismantled. Therefore, the refined building earthquake loss assessment is important for the post-earthquake repair strategy of the building.

Currently, building earthquake economic loss evaluation takes a vulnerability database as a main method (Wu Jiwei, Liangxing, Zhu Han Bo. FEMA P-58 new generation building earthquake resistance evaluation method [ J ]. earthquake engineering and engineering vibration, 2015,01(3): 37-43.). The vulnerability database contains earthquake damage and loss data for structural, non-structural and internal properties. The methods take performance groups as basic units of earthquake damage evaluation and earthquake loss evaluation, wherein the performance groups are component sets divided according to the earthquake resistance of the components.

However, the method with the performance group as the basic evaluation unit is greatly limited in terms of loss data acquisition and visualization. In terms of data acquisition, generally speaking, the repair cost of a component can be calculated, but the loss data of a performance group needs a large amount of statistics and is difficult to acquire. In the aspect of visualization, the current evaluation method does not relate to specific components, so that the visualization result of the spatial distribution of earthquake damage and loss in the building cannot be given. Even with the same loss of the same type of component, the repair strategy may be different due to the different spatial locations. Therefore, the lack of spatially distributed visualization may impact the formulation of repair strategies.

The Building Information Model (BIM) provides building data at a component level, and can change a basic evaluation unit into a component, thereby solving the two problems of data acquisition and visualization. On one hand, the BIM includes detailed information of each component, and the repair cost of the component can be calculated by combining the repair cost standard (such as the U.S. CSI standard library and the chinese repair standard library) of a specific region. Therefore, the regional limitations of the method for repairing the standard library can be well solved by combining BIM. On the other hand, the BIM is a refined three-dimensional model, can intuitively display the three-dimensional distribution of the earthquake damage and the loss of the component, and provides a more interactive three-dimensional visualization environment for the repair decision of a user. The BIM is combined with the vulnerability database, so that the efficiency and the precision of the evaluation of the earthquake economic loss of the building can be effectively improved. Currently, a building economic loss assessment method combining BIM and vulnerability database has not been proposed.

The invention provides a construction earthquake economic loss fine evaluation method at a component level, which can further accurately evaluate the loss to components from performance groups and provide specific component loss distribution, thereby providing important reference for construction earthquake repair strategies or disaster prevention design.

Disclosure of Invention

The invention aims to provide a method for finely evaluating economic loss of a building earthquake at a component level.

The method comprises the following steps:

firstly, constructing a component earthquake damage evaluation module, then constructing a loss evaluation module, and finally constructing a visualization module; the component earthquake damage evaluation module provides basic data for the loss evaluation module, and the visualization module displays evaluation results of the component earthquake damage evaluation module and the loss evaluation module through a visualization means;

the component earthquake damage evaluation module firstly maps the building information model to the performance group, then analyzes the structural earthquake time course, evaluates the earthquake damage of the performance group and finally reversely maps the earthquake damage of the performance group to the component; mapping from the building information model to the performance group and transmitting structural earthquake time-course analysis data to evaluate earthquake damage of the performance group;

the loss evaluation module firstly extracts the measurement data, then acquires the component repair standard data, then maps the repair standard, finally evaluates the loss of the building and the component, and evaluates the loss of the building and the component by the extracted measurement data, the acquired component repair standard data and the data mapped by the repair standard;

the visualization module comprises earthquake damage three-dimensional visualization and loss three-dimensional visualization, and the earthquake damage three-dimensional visualization and the loss three-dimensional visualization independently run based on data of the modules.

The mapping from the building information model to the performance group is realized by combining the building information model and manual work.

The reverse mapping of performance group seismic damage to components employs plastic hinge angles of beam-column joints to distribute the seismic damage.

In the building and component loss evaluation, the repair cost of the component is obtained by multiplying unit loss data by measurement data; the repair costs of all the components are added to obtain the overall repair cost of the building.

In the visualization module, two display standards of an absolute mode and a relative mode are adopted; in the absolute mode, 5 different colors are respectively displayed according to the earthquake damage level display of the component, and the 5 colors are sequentially from weak to strong: translucent white, green, yellow, orange and red; in the relative mode, the economic loss is divided into 4 levels according to the ratio of the component repair cost to the construction cost, and the economic loss is displayed as 4 different colors: 0-25% appear blue, 25-50% appear green, 50-75% appear yellow, > 75% appear red.

The technical scheme of the invention has the following beneficial effects:

in the scheme, the method for finely evaluating the economic loss of the building earthquake at the component level is provided, the performance group of the loss evaluation can be further accurate to the component, and specific component loss distribution is provided, so that an important reference is provided for a building earthquake repair strategy or disaster prevention design.

Drawings

FIG. 1 is a flow chart of a construction earthquake economic loss fine evaluation method of the invention at a component level;

FIG. 2 is a BIM model mapping transformation hierarchy;

FIG. 3 is a structural analysis model after transformation;

FIG. 4 is a flow chart of a reverse mapping of performance group damage to components;

FIG. 5 is a "BIM earthquake damage assessment" function panel;

FIG. 6 is a statistical diagram of economic loss evaluation of building earthquake.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The invention provides a construction earthquake economic loss fine evaluation method of a component level, as shown in figure 1, the method comprises the following steps:

firstly, constructing a component earthquake damage evaluation module, then constructing a loss evaluation module, and finally constructing a visualization module; the component earthquake damage evaluation module provides basic data for the loss evaluation module, and the visualization module displays evaluation results of the component earthquake damage evaluation module and the loss evaluation module through a visualization means.

1 component earthquake damage evaluation module

In order to realize component-level earthquake damage assessment, a mapping relation from the BIM component to a vulnerability database performance group needs to be established; then, realizing earthquake time-course analysis by relying on BIM, converting the BIM into a structural analysis model, and obtaining required engineering demand parameters and structural deformation data through time-course analysis so as to support earthquake damage evaluation and component earthquake damage reverse mapping; then evaluating earthquake damage of the performance group based on the vulnerability database and the engineering demand parameters; and finally, reversely mapping the seismic damage of the performance group to the component according to structural deformation data obtained by time-course analysis to obtain the seismic damage grade of the component.

(1) Mapping of components to performance groups

The performance groups are members with similar attributes, construction characteristics, installation modes and damage modes, and have the same engineering requirement parameters (such as interlayer displacement angle, floor acceleration and the like). In the vulnerability database, each performance group has a unique ID and detailed partitioning criteria.

The mapping of components to performance groups is to determine the ID of each component corresponding to a performance group according to the partition criteria of the vulnerability database. The division standard of the performance group not only considers the attribute information of the geometry, the material and the like of the component, but also considers the detailed information of the structure, the mechanical performance and the like. BIM generally comprises complete attribute information such as geometry, materials and the like, but almost rarely comprises structural and mechanical property information, so that the invention realizes the mapping from a component to a property group by adopting a BIM and manual combined identification mode.

(2) BIM-based structural seismic time course analysis

And (3) directly converting the BIM model into a structural analysis model, and then setting a structural load, selecting seismic waves and setting a seismic motion scene to perform structural seismic time-course analysis. After the structural time course analysis is completed, engineering demand parameters (data such as a maximum interlayer displacement angle, a floor peak acceleration, a floor peak speed and the like) can be obtained for earthquake damage assessment, and meanwhile, deformation data of nodes can also be obtained for reverse mapping of subsequent component earthquake damage states.

(3) Evaluation of seismic damage to performance groups

According to the vulnerability curves of different performance groups provided by the vulnerability database, the probability and the corresponding quantity of different earthquake damage levels of each performance group can be calculated by combining the engineering demand parameters obtained by the method.

(4) Reverse mapping of performance group seismic damage states to components

The vulnerability database does not give a particular state in which a component is. It is therefore necessary to assign them to specific components after having obtained different levels of epicentre for the performance group. In the present invention, for structural members (e.g., beam slab columns), the seismic damage rating may be assigned using the results of a time course analysis of the structure. Specifically, the present invention uses the plastic hinge angle of the beam-column joint to distribute seismic damage. The high earthquake damage grade is preferentially distributed to the beam column node with larger plastic hinge angle, and the method can make the earthquake damage distribution of the component consistent with the time course analysis result.

The grading distribution of the seismic damage of the structural member is divided into two steps: the node earthquake damage grade is determined, and then the component grade is determined. Firstly, arranging all nodes in a descending order according to a plastic hinge angle obtained by time course analysis; then, sequentially distributing the earthquake damage states from high to low to the nodes in descending order; and finally, taking the maximum value of the seismic damage state of the connected nodes of the structural member as the seismic damage state of the structural member. For non-structural elements (e.g., partitions, stairs, etc.), the distribution of the seismic damage tends to exhibit greater uncertainty, and thus the seismic damage status of the same performance group may be randomly distributed among different elements.

2 loss evaluation module

The component loss assessment can be calculated from the component unit loss and the component gauge. In the invention, the unit loss of the component is obtained through the repair standard library of the building location, so that the loss evaluation which is more consistent with the local situation can be obtained; the component measurement aspect is extracted through BIM, so that an accurate measurement value can be obtained; and finally, integrating the loss of the components, and calculating the repair cost of the whole building.

(1) Acquisition of component unit loss data

Repair standards databases are provided in many countries, such as the U.S. CSI standard, chinese repair quota, etc. These repair criteria may provide a per unit repair cost that is consistent with the actual conditions of the local repair. However, these unit repair data correspond to a completely damaged state of the component (i.e., the highest damage level), and do not take into account other damage levels. The vulnerability database provides unit loss data of different damage levels of each performance group, and the data are obtained based on a large amount of investigation and have credibility. Therefore, the unit loss data of the component with different earthquake damage levels can be calculated according to the ratio of the loss data with different earthquake damage levels in the vulnerability database and by combining the same-proportion conversion mode with the local repair standard library.

(2) Component metrology data acquisition

According to the repair standard library, different component measurement units may be different, and measurement data corresponding to the components needs to be extracted from the BIM. The measurement unit of the components such as wall beam, plate and column is cubic meter according to the volume measurement, and the measurement data can be directly obtained from the component attribute table; the components such as the stairs are measured according to the horizontal projection area, and the measurement data can be calculated through the component bounding box data.

(3) Calculation of component and Overall repair costs

For any component, the unit loss data is multiplied by the metering data to obtain the repair cost of the component; and adding the repair costs of all the components to obtain the overall repair cost of the building.

3 visualization module

In order to realize visualization, firstly, the earthquake damage and loss of different components are different, and a uniform visualization standard needs to be established; then, three-dimensional visualization and virtual roaming of the earthquake damage and the loss of the building are realized, so that personnel can go deep into the building to observe the spatial distribution of the earthquake damage and the loss, and a more reasonable repair scheme is formulated.

(1) Visualization criteria

The magnitude of the jarring of each component is different based on the vulnerability data. The structural members (such as beam column nodes) have 4 earthquake damage grades at most, and are respectively represented by DS1-DS4, and the damage degree is gradually increased. In order to show the different levels of the component more clearly, the invention sets two display criteria: absolute mode and relative mode.

In the absolute mode, 5 different colors are displayed respectively, directly according to the earthquake damage level display of the component: intact-translucent white, DS 1/green, DS 2/yellow, DS 3/orange, DS 4/red.

The absolute mode may accurately demonstrate the level of damage to the component, but may be difficult to demonstrate component repairability. For example, if the beam column node and the block wall are both in the DS2 state, the beam column node is repairable, while the block wall must be dismantled for reconstruction. Accordingly, there is a need for a repairability of a relative mode display member.

The invention carries out normalization processing on the earthquake damage grades of the components, and divides the earthquake damage grades into repairable damage (which can be repaired without being dismantled by adopting certain repair measures) and non-repairable damage (which needs to dismantle and rebuild corresponding components). After normalization (and relative mode), the three-dimensional model is displayed as 3 different colors according to the earthquake damage level of the component: intact/translucent white, repairable damage/yellow, irreparable damage/red.

The losses of different components differ considerably with respect to the economic losses of the components. Therefore, the present invention adopts a relative mode, dividing the economic loss into 4 levels according to the ratio of the component repair cost to the construction cost, respectively displaying 4 different colors: 0-25%/blue, 25% -50%/green, 50% -75%/yellow, > 75%/red.

(2) Earthquake damage and loss three-dimensional visualization

After the earthquake damage and loss visualization standard is determined, the color and transparency mode of the component can be set to display the earthquake damage and loss. Taking three-dimensional visualization of earthquake damage as an example, firstly, screening components according to the earthquake damage attribute in BIM, and grouping the components; setting RGB values corresponding to the grade colors of the earthquake damage to the component with the earthquake damage, and setting transparency to highlight the component without the earthquake damage; and finally, the color attributes are applied to all the components, so that three-dimensional models with different colors can be formed, and the three-dimensional visualization of the earthquake damage is realized.

The following description is made with reference to specific embodiments.

Step 1, evaluating the earthquake damage of the component.

(1) BIM model to Performance group mapping

This embodiment will build a BIM model of the building. The present invention transforms the BIM model map into a performance set for evaluation of earthquake damage according to a hierarchy as shown in FIG. 2. The identification process is divided into 4 levels: building, floor, component category and performance group. In the vulnerability database, the performance groups are all based on floor, therefore, the component identification mapping of the method is also performed on a floor-by-floor basis. Firstly, a BIM model of a building is split according to floors, and then each component type is respectively filtered aiming at a single-layer model. The identification of the first three levels can be automatically completed by relying on BIM. However, the identification of the performance group level requires both the necessary BIM information and information such as mechanics and structure of the component to be supplemented manually, and thus the identification of the fourth level employs a combination of BIM and manual work.

In order to save the vulnerability group ID of the component, the method adds a 'vulnerability group ID' field in the attribute table of each type of component. It is noted that the components and vulnerability IDs are not in a one-to-one relationship. In the vulnerability database, the beam slab columns are calculated for seismic damage through their common nodes. For example, a beam may connect the side columns and center columns of the frame, and the performance groups corresponding to the side columns and center columns are different, so that the beam corresponds to two performance groups, and 2 vulnerability group IDs need to be stored. Therefore, structural members such as beam, plate, and column need to store a plurality of vulnerability groups IDs according to the number of connected nodes.

(2) And structural seismic time course analysis. The BIM model may be imported into the structural analysis software through an intermediate transformation file, as shown in FIG. 3. The modeling process of the structural analysis model is omitted in the process, and the analysis efficiency is improved. The seismic motion adopted in the time-course analysis of the structure seismic is American El-Centro seismic waves which are respectively input along the X, Y direction of the structure. And finally, structural earthquake time-course analysis result data (engineering demand parameters) and node deformation data can be obtained, and the analysis result shows that the whole building is slightly damaged.

(3) And (5) evaluating the earthquake damage of the performance group. And calculating the probability and the corresponding quantity of different earthquake damage levels of each performance group according to the vulnerability curves of different performance groups provided by the vulnerability database and by combining with the engineering demand parameters.

(4) Reverse mapping of performance groups to components. The inverse mapping of the performance group damage to the component is achieved by the algorithm shown in FIG. 4. For the whole building, the distribution of the earthquake damage states of the components is completed in sequence by taking floors as basic units. First, in floor i, a two-dimensional array DS [ N ] is established_PG][4]And the method is used for recording the number of different earthquake damage levels of different performance groups. Wherein N is_PGRepresenting the total number of performance groups of the floor, the highest damage level of the component does not exceed 4. In addition, an array DS _ J [ N ] is created_joint]And the earthquake damage level of the node is recorded. As described above, the node seismic damage levels have been sorted according to the plastic hinge angles, so the node seismic damage levels are determined. Wherein N is_jointIndicating the total number of floor nodes. Then, for one member with the number j, it is determined whether the member is a structural member, that is, a beam column or the like, based on the number of the vulnerability groups ID (P58_ ID). If the structural component is not a structural component, finding a corresponding performance group according to the vulnerability group ID, and randomly distributing a seismic damage grade k. As long as the number of levels is greater than zero (i.e., DS j][k]Not less than 0), the earthquake damage grade is successfully distributed, and the grade number DS [ j ] is equal to][k]Minus 1. If the component is a structural component, the component attribute table needs to be queried to obtain all node vulnerability group IDs, and then the component is assigned the highest earthquake damage grade of the node. The above process is repeated until all components of the layer have been assigned a seismic grade.

The invention develops a BIM earthquake damage evaluation program, a functional panel of which is shown in figure 5, firstly, an adding project parameter button is clicked to add parameters required by earthquake damage evaluation to all BIM components; then clicking a button for reading EDPs, and reading structural earthquake time course analysis result data; and finally clicking a 'earthquake damage evaluation' button, and automatically carrying out operations of mapping of a building performance group, performance group earthquake damage evaluation, reverse mapping of an earthquake damage state to a component and the like by the plug-in unit, thereby finally finishing the earthquake damage evaluation of the component.

And 2, evaluating the loss of the components and the building.

(1) And (4) determining the unit repair cost of the component. In the method, an acquisition function F (P58_ ID, DSn) of the unit repair cost is established. The function determines the vulnerability group corresponding to the component according to the vulnerability group ID, then queries the result function of the vulnerability group, and obtains the unit repair cost with the earthquake damage level DSn. Assuming that the Unit repair Cost of a component in the repair standard library is Unit _ Cost _ Max, if the component is an non-structural component, the Unit repair Cost corresponding to the damage level DSn is Unit _ Cost _ DSn, which can be calculated by equation (1):

wherein, P58_ ID is the vulnerability group ID corresponding to the component, and DS _ Max represents the maximum damage level of the performance group.

If the component is a structural component, the component connects two nodes, corresponding to two vulnerability groups ID. In the method, considering that the repair of the structural member is related to the two connected nodes, the average value of the repair costs of the two nodes is used as a reference to calculate the Unit repair Cost corresponding to the earthquake damage level DSn as Unit _ Cost _ DSn, as shown in formula (2):

(2) component and building loss assessment. By clicking the "loss assessment" button, the program can automatically calculate its repair cost according to the failure status of each component and the corresponding unit repair cost, and write the calculation result into the attribute list of the component.

For any component i, assuming the earthquake damage level is DSn, the corresponding measure of the repair standard library is V_iThen the component Repair Cost Repair _ Cost_iCan be calculated by the following equation (3):

Repair_Cost_i＝Unit_Cost_DSn_i×V_i (3)

the Repair Cost Repair _ Cost of the whole building is the sum of all the component Repair costs, as calculated by the following formula (4):

wherein N is the total number of building elements.

The specific loss statistics for each type of building component are shown in fig. 6.

And 3, three-dimensional visualization of the evaluation result.

(1) And (5) visualizing earthquake damage. Clicking the 'earthquake damage (absolute mode)' button of the plug-in, all BIM primitives will be filled with different colors according to the earthquake damage. The earthquake damage level of each component and the spatial distribution condition of each type of damage component can be visually checked from the three-dimensional interface. Clicking the "jar (relative mode)" button can change the coloring scheme.

Clicking on the "good component", "repairable component", and "unrepairable component" buttons may isolate a good component, repairable component, or unrepairable component, respectively.

(2) And (4) loss visualization. And clicking a 'loss visualization' button of the plug-in, setting different primitive filling colors according to the proportion of the repair cost of each component to the construction cost, obtaining a loss evaluation result, and visually seeing the loss condition of each component.

Through the 3 steps, the building earthquake economic loss fine evaluation method based on the component is realized, the performance group of the loss evaluation can be further accurate to the component, and specific component loss distribution is provided, so that an important reference is provided for a building earthquake repair strategy or disaster prevention design.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for finely evaluating economic loss of building earthquake at a component level is characterized by comprising the following steps: the method comprises the following steps:

the component earthquake damage evaluation module firstly maps the building information model to the performance group, then analyzes the structural earthquake time course, evaluates the earthquake damage of the performance group, and finally performs reverse mapping from the earthquake damage of the performance group to the component to obtain the earthquake damage grade of the component; the method specifically comprises the following steps:

s11: mapping of components to performance groups

Determining the ID of each component corresponding to a performance group according to a division criterion of a vulnerability database, wherein the division standard of the performance groups not only considers the geometric and material attribute information of the components, but also considers the detailed information of the structure and the mechanical property, and the BIM and manual combined identification mode is adopted to realize the mapping from the components to the performance groups;

s12: BIM-based structural seismic time course analysis

Directly converting and guiding a BIM model into a structural analysis model, setting a structural load, selecting seismic waves, setting a seismic motion scene, and then performing structural seismic time-course analysis, wherein engineering requirement parameters are obtained after the structural time-course analysis is completed and are used for seismic damage assessment, and meanwhile, deformation data of nodes are obtained and are used for reverse mapping of the seismic damage state of a subsequent component;

s13: evaluation of seismic damage to performance groups

Calculating the probability and the corresponding quantity of different earthquake damage levels of each performance group according to the vulnerability curves of different performance groups provided by the vulnerability database and by combining the engineering demand parameters obtained in S12;

s14: reverse mapping of performance group seismic damage states to components

For the structural component, allocating earthquake damage levels by using the results of structural time course analysis;

the loss evaluation module firstly extracts the measurement data, then acquires the component repair standard data, then maps the repair standard, finally evaluates the loss of the building and the component, and evaluates the loss of the building and the component by the extracted measurement data, the acquired component repair standard data and the data mapped by the repair standard; the method specifically comprises the following steps:

s21: acquisition of component unit loss data

According to the ratio of the loss data of different earthquake damage levels in the vulnerability database, combining the vulnerability database with a local repair standard library in an equal proportion conversion mode, and calculating unit loss data of the component of different earthquake damage levels;

s22: component metrology data acquisition

According to the repair standard library, different component measurement units are different, and measurement data corresponding to the components need to be extracted from the BIM;

s23: calculation of component and Overall repair costs

For any component, the unit loss data is multiplied by the metering data to obtain the repair cost of the component; adding the repair costs of all the components to obtain the overall repair cost of the building;

the visualization module performs earthquake damage three-dimensional visualization and loss three-dimensional visualization, and the earthquake damage three-dimensional visualization and the loss three-dimensional visualization independently operate on the basis of data of the component earthquake damage evaluation module and the loss evaluation module; the component visualization module specifically comprises:

s31: visualization criteria

According to the vulnerability data, the earthquake damage grades of each component are different, the components have 4 earthquake damage grades at most, the earthquake damage grades are respectively represented by DS1-DS4, the damage degree is gradually increased, and two display standards are determined: absolute mode and relative mode;

in the absolute mode, 5 different colors are displayed respectively, directly according to the earthquake damage level display of the component: intact-translucent white, DS 1-green, DS 2-yellow, DS 3-orange, DS 4-red;

the repairability of the component is shown in a set relative mode, the damage level is divided into repairability damage and non-repairability damage, and the damage level is respectively displayed as 3 different colors in the three-dimensional model according to the damage level of the component: intact-translucent white, repairable destructive-yellow, irreparable destructive-red;

further, with the relative mode, the economic loss is divided into 4 levels according to the ratio of the component repair cost to the construction cost, and the levels are respectively displayed as 4 different colors: 0-25% -blue, 25% -50% -green, 50% -75% -yellow, and > 75% -red;

s32: earthquake damage and loss three-dimensional visualization

Firstly, screening components according to earthquake damage attributes in BIM, and grouping the components; setting RGB values corresponding to the grade colors of the earthquake damage to the component with the earthquake damage, and setting transparency to highlight the component without the earthquake damage; and finally, the color attributes are applied to all the components to form a three-dimensional model with different colors, so that three-dimensional visualization of the earthquake damage is realized.

2. The component-level architectural seismic economic loss refinement assessment method according to claim 1, characterized in that: the reverse mapping of the performance group seismic damage to the component uses the plastic hinge angles of the beam-column nodes to distribute the seismic damage.