BIM-based concrete dam service performance feature construction system and method

Abstract

The invention discloses a BIM-based concrete dam service performance feature construction system and method, and the method comprises the steps: reading a layered and blocked fine BIM model of a concrete dam, and adding attribute information including ID codes, dam sections, upper and lower boundary elevations, unit centroid point coordinates, safety monitoring instrument ID and other information; in the dam condition monitoring unit, a monitoring instrument BIM model assembly is constructed according to the three-dimensional coordinates of the safety monitoring instrument, and attribute information including a monitoring point number and an instrument type code is added; the equivalent monitoring effect quantity of the centroid point of the dam state monitoring unit is calculated, and the abnormal state of a certain monitoring type in the dam state monitoring unit is analyzed; according to the type weighting value and the evaluation state of the monitoring instrument, calculating an abnormal degree evaluation value of the dam state monitoring unit; and establishing a mapping relationship between evaluation values and colors, and performing three-dimensional color rendering on the performance of each monitoring unit in dam service.

Description

Technical Field

[0001] The present invention relates to a system and method for constructing the service behavior characteristics of a concrete dam based on BIM, belonging to the technical field of hydropower engineering. Background Art

[0002] The safe operation of a hydropower station dam is related to the safe production and economic benefits of the power plant itself, and also to the safety of people's lives and property downstream of the dam. Affected by factors such as the external operating environment and the deterioration of its own materials, the problem of the safe operation of the dam has received extensive attention. The traditional service safety behavior of the dam is to draw graphical process lines, distribution maps, and characteristic value reports using safety monitoring data. The traditional method has two disadvantages: one is that it is impossible to quantitatively evaluate the service behavior of the dam; the other is that it is impossible to intuitively and accurately reflect the operating behavior of each part of the dam and the overall change of the dam by using analysis methods such as graphical process lines and characteristic reports. Therefore, it is necessary to study a system and method for constructing the service behavior characteristics of a concrete dam that can be quantified and intuitively displayed. Summary of the Invention

[0003] Object of the Invention: Aiming at the problems and deficiencies existing in the prior art, the present invention provides a system and method for constructing the service behavior characteristics of a concrete dam based on BIM, which can realize the safety behavior evaluation and visual expression of the concrete dam, realize the real-time reconstruction of the service behavior characteristics of the dam, intuitively show the change trend of the dam structure characteristics, and provide a scientific and intuitive means for the safety behavior analysis and evaluation of the dam.

[0004] Technical Solution: A system for constructing the service behavior characteristics of a concrete dam based on BIM, the system includes:

[0005] (1) A dam behavior monitoring unit reading module, used to read the fine BIM model of the concrete dam divided into layers and blocks;

[0006] (2) A monitoring unit attribute adding module, used to add attribute information to the dam behavior monitoring unit based on BIM, including information such as ID coding, dam section, upper and lower boundary elevations, centroid point coordinates of the unit, and ID of the safety monitoring instrument, etc.;

[0007] (3) A monitoring instrument BIM model component construction module, used to construct a monitoring instrument BIM model component in the dam behavior monitoring unit according to the three-dimensional coordinates of the safety monitoring instrument. The model component is constructed according to the actual installation of the instrument on site and adds attribute information, including the measuring point number and instrument type coding;

[0008] (4) A monitoring effect quantity calculation module, used to calculate the equivalent monitoring effect quantity of the centroid point of the dam behavior monitoring unit;

[0009] (5) A monitoring effect quantity analysis module, used to analyze the abnormal states of various monitoring types in the dam behavior monitoring unit;

[0010] (6) Abnormality degree evaluation module, used for calculating the evaluation value of the abnormality degree of the dam behavior monitoring unit;

[0011] (7) Service behavior rendering module, used for three-dimensional color rendering of the behavior of each monitoring unit during the service of the dam.

[0012] A method for constructing the service behavior characteristics of a concrete dam based on BIM, used to implement the above system, and the method includes:

[0013] (1) Dam behavior monitoring unit reading step, reading the fine BIM model of the concrete dam by stratification and block;

[0014] (2) Monitoring unit attribute adding step, adding attribute information to the dam behavior monitoring unit based on BIM, including information such as ID code, dam section, upper and lower boundary elevations, centroid point coordinates of the unit, ID of the safety monitoring instrument, etc.;

[0015] (3) Monitoring instrument BIM model component construction step, in the dam behavior monitoring unit, constructing the monitoring instrument BIM model component according to the three-dimensional coordinates of the safety monitoring instrument, and the model component is constructed according to the actual installation of the instrument on site, and adding attribute information, including measuring point number, instrument type code;

[0016] (4) Monitoring effect quantity calculation step, calculating the equivalent monitoring effect quantity of the centroid point of the dam behavior monitoring unit;

[0017] (5) Monitoring effect quantity analysis step, analyzing the abnormal state of a certain type of monitoring in the dam behavior monitoring unit;

[0018] (6) Abnormality degree evaluation step, calculating the evaluation value of the abnormality degree of the dam behavior monitoring unit;

[0019] (7) Service behavior rendering step, establishing the mapping relationship between the evaluation value and the color, and performing three-dimensional color rendering on the behavior of each monitoring unit during the service of the dam.

[0020] Compared with the prior art, the system and method for constructing the service behavior characteristics of a concrete dam based on BIM can calculate the monitoring effect quantity of the dam behavior monitoring unit, analyze and evaluate, obtain the evaluation value of the abnormality degree of the dam behavior monitoring unit, and finally perform three-dimensional visualization rendering and display output after constructing the dam behavior monitoring unit and the monitoring instrument BIM model component. Description of the Drawings

[0021] Figure 1 It is the application environment diagram of the system for constructing the service behavior characteristics of a concrete dam based on BIM in a specific embodiment;

[0022] Figure 2Module diagram of the BIM-based concrete dam service behavior characteristics construction system in a specific embodiment;

[0023] Figure 3 Flowchart of the BIM-based concrete dam service behavior characteristics construction method in a specific embodiment;

[0024] Figure 4 Schematic diagram of the coordinate rotation and translation of safety monitoring instruments in a specific embodiment. Detailed implementation manners

[0025] The present invention will be further illustrated below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art's various equivalent forms of modifications to the present invention all fall within the scope defined by the appended claims of this application.

[0026] As Figure 1 shown, the BIM-based concrete dam service behavior characteristics construction system 10 is installed and run on the analysis device 1. The analysis device 1 further includes a model data storage device 20, a dam behavior characteristic display device 30, and a processor 40. The dam behavior characteristic display device 30 is an LED display screen for displaying the results of the dam service behavior characteristics.

[0027] As Figure 2 shown, in this embodiment, the BIM-based concrete dam service behavior characteristics construction system 10 includes the following modules:

[0028] Receive user operation instruction module 100: Receive user operation instructions. The user can use Revit software to establish a BIM model of the concrete dam according to the dam structure design and construction drawings, and click to confirm and import.

[0029] Dam behavior monitoring unit reading module 101: Detect whether there is a user-triggered data input device event. If it is detected that there is a user-triggered input device event, generate a BIM-based dam behavior monitoring unit on the device display according to the transverse joints, longitudinal joints, induced joints, and construction joints.

[0030] Monitoring unit attribute adding module 102: The user adds attribute information to the dam behavior monitoring unit, including information such as ID coding, dam section, upper and lower boundary elevations, unit centroid point coordinates, and safety monitoring instrument ID, and stores it in the model data storage device 20.

[0031] Monitoring Instrument BIM Model Component Construction Module 103: In the dam behavior monitoring unit, according to the three-dimensional coordinates of the safety monitoring instruments, the monitoring instrument BIM model components are constructed. The model components are constructed according to the actual installation of the on-site instruments, and attribute information is added, including the measuring point number, instrument type code (SL represents the static level, JZ represents the crack meter, S5 represents the multi-directional strain gauge group, etc.), and is stored in the model data storage device 20.

[0032] Monitoring Effect Quantity Calculation Module 104: Taking the dam behavior monitoring unit as the calculation object, according to its centroid point coordinates and the layout of the monitoring points in the dam structure, calculate the equivalent monitoring effect quantities of the centroid point of the dam behavior monitoring unit at different times, including deformation monitoring effect quantity, seepage monitoring effect quantity, stress and strain monitoring effect quantity, temperature monitoring effect quantity, form an equivalent monitoring effect quantity sequence of the centroid point of the behavior monitoring unit, and store it in the model data storage device 20.

[0033] Monitoring Effect Quantity Analysis Module 105: Establish a probability distribution function F(x), use the 3σ criterion to analyze the abnormal state of the equivalent monitoring effect quantity sequence of the centroid point of the behavior monitoring unit in 104, and store the abnormal state in the model data storage device 20.

[0034] Abnormality Degree Evaluation Module 106: Use expert knowledge to assign weight values to each monitoring instrument type in the area of the behavior monitoring unit to form a weight matrix. At a certain moment t, use the 3σ criterion to evaluate the abnormal state of the data of each instrument type in the monitoring unit to form an evaluation state matrix. Multiply the weight matrix by the evaluation state matrix to obtain the abnormality degree evaluation value Q of the monitoring unit, and store it in the model data storage device 20.

[0035] Service Behavior Rendering Module 107: Establish a mapping relationship between the evaluation value Q in 106 and colors, assign colors to the BIM of each dam behavior monitoring unit, that is, three-dimensional rendering, and display it on the device display screen.

[0036] The module referred to in the present invention is implemented by a series of computer programs that can be executed by the processor 40 and can complete fixed functions, and is stored in the point cloud data storage device 20. In this embodiment, the implementation method of the system is specifically described in Figure 3 the flowchart.

[0037] As Figure 3 shown (according to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted), a method for constructing the service behavior characteristics of a concrete dam based on BIM includes the following steps:

[0038] Step S10, read the dam behavior monitoring unit. The monitoring unit can establish a BIM model of the concrete dam using Revit software according to the dam structure design and construction drawings; according to the concrete dam construction organization design plan, divide and block the dam structure by transverse joints, longitudinal joints, and induced joints, construct a fine BIM model of the concrete dam with dam sections and dam blocks as units, and use V1, V2, ……, V m ; combined with the actual pouring situation of the concrete dam, further refine and divide the completed fine BIM model of the dam according to construction joints to construct a more refined structural unit V mn represents the dam behavior monitoring unit based on BIM.

[0039] Step S11, the user manually adds the attribute information of the dam behavior monitoring unit based on BIM, including information such as ID code, dam section, upper and lower boundary elevations, centroid point coordinates of the unit, and ID of the safety monitoring instrument.

[0040] (1) The calculation formula for the centroid point coordinates O(x o , y o , z o ) of the dam behavior monitoring unit based on BIM is as follows:

[0041]

[0042] Among them, μ(x, y, z) represents the density of the poured concrete of the dam behavior monitoring unit based on BIM, which is taken as a constant μ according to the actual construction, so the centroid of the monitoring unit is the centroid; V is the volume of the monitoring unit.

[0043] (2) The added attribute information of the dam behavior monitoring unit based on BIM stores the ID code of the safety monitoring instrument to form a List <t>Set. When 1 safety monitoring instrument is installed in the monitoring unit, the set T stores the ID information of 1 safety monitoring instrument; when multiple safety monitoring instruments are installed in the monitoring unit, the set T stores the ID information of multiple safety monitoring instruments; when no safety monitoring instrument is installed in the monitoring unit, the set T is empty and does not store the ID information of the safety monitoring instrument.

[0044] Step S12: According to the two-dimensional layout drawing of safety monitoring instruments in the construction drawing stage, extract the dam transverse, dam longitudinal, and elevation information of the safety monitoring instruments and convert them into the local coordinate system of the dam BIM model. When the positive directions of the dam transverse and dam longitudinal are consistent with the positive directions of the local coordinate system of the dam BIM model, the coordinates of the safety monitoring instrument are (x = dam transverse, y = dam longitudinal, z = elevation); when the positive directions of the dam transverse and dam longitudinal are inconsistent with the positive directions of the local coordinate system of the dam BIM model, the coordinates of the safety monitoring instrument are processed according to the actual rotation and translation, as Figure 4 shown, and the specific processing is as follows:

[0045] x = x′cosθ + y′sinθ + a

[0046] y = y′cosθ - x′sinθ + b

[0047] In the formula, x′ and y′ are the dam transverse and dam longitudinal of the safety monitoring instrument in the construction drawing, x and y are the coordinates in the local coordinate system of the dam BIM model, and θ, a, and b respectively represent the angle of counterclockwise rotation, the translation amount of the x-axis, and the translation amount of the y-axis when the dam transverse and dam longitudinal are transformed into the local coordinate system of the dam BIM model.

[0048] In the dam behavior monitoring unit, construct the BIM model components of the monitoring instruments according to the three-dimensional coordinates of the safety monitoring instruments. The model components are constructed according to the actual installation of the instruments on site and attribute information is added, including the measuring point number, instrument type code (SL represents static level, JZ represents crack meter, S5 represents multi-directional strain gauge group, etc.).

[0049] Step S13: Take the dam behavior monitoring unit as the calculation object, and calculate the equivalent monitoring effect quantity of the centroid point of the dam behavior monitoring unit according to the centroid point coordinates in step S11 and the layout of the monitoring points in the dam structure. The monitoring effect quantity includes deformation monitoring effect quantity, seepage monitoring effect quantity, stress and strain monitoring effect quantity, and temperature monitoring effect quantity;

[0050] (1) When the dam behavior monitoring unit contains multiple monitoring instruments, calculate and divide the monitoring instruments in the behavior monitoring unit by type, and calculate the distance dij from each monitoring point to the centroid point in each type of monitoring instrument respectively. At a certain moment t, the effect quantity values of each monitoring point [A i0 , A i1 , ……, A ij , the inverse distance weighted interpolation algorithm is used to calculate the effect quantity A of the centroid point O io .

[0051]

[0052] In the formula, (x o , y o , z o ) represents the coordinates of the centroid point O of the monitoring unit, and (x ij , y ij , z ij ) represents the coordinates of the j-th monitoring point in the i-th type of monitoring instrument, and n represents the number of types of monitoring instruments in the behavior monitoring unit.

[0053] (2) When there is only one monitoring instrument in the dam behavior monitoring unit, the monitoring effect quantity value of this monitoring instrument can be directly regarded as the monitoring effect quantity at the centroid point of this monitoring unit.

[0054] (3) When there is no monitoring instrument in the dam behavior monitoring unit, the monitoring effect quantity at the centroid of the adjacent monitoring unit can be selected, and the monitoring effect quantity of the centroid point of the current monitoring unit can be calculated by the inverse distance weighted interpolation algorithm.

[0055] Step S14, for a certain type of monitoring effect quantity sequence of the centroid point of the behavior monitoring unit (corresponding to the previous one) within a certain period of time, use the polynomial function F(x) for fitting calculation, count the difference ΔF(x) between the measured value and the predicted value, and calculate the expectation E and the standard deviation σ.

[0056] F(x) = C0 + C1x + … + C n x n

[0057]

[0058] According to the expected value E, the abnormal state of a certain type of monitoring in the behavior monitoring unit can be defined as follows: represents normal, represents abnormal.

[0059] Step S15, use expert knowledge to assign weight values to each type of monitoring instrument in the area of the behavior monitoring unit to form the weight matrix [w1, w2, …, w n of each type of monitoring instrument in this area, and perform normalization processing. At a certain moment, use the abnormal state analysis method of the monitoring type in Step S14 to evaluate the monitoring effect quantity sequences of each instrument type in this monitoring unit to form the evaluation state matrix [a1, a2, …, a k , by multiplying the weight matrix and the evaluation status matrix, the evaluation value Q of the abnormality degree of the unit can be obtained, and the evaluation attribute information of the dam behavior monitoring unit at the current moment is updated to map the evaluation value of the abnormality degree of the dam behavior monitoring unit in real time.

[0060] Q = [a1, a2, …, a k * [w1, w2, …, w k -1

[0061] In the formula, a k represents the evaluation status of the k-th measuring point. An abnormality is represented by 1, and a normal state is represented by 0; w k represents the weight of the k-th measuring point, and its range is between 0 and 1.

[0062] Step S16: Using Step S15, the evaluation value Q of the abnormality degree of each behavior monitoring unit at a certain period of time can be calculated in real time. Its range is between 0 and 1. A mapping relationship of color changes (from green [0, 255, 0] to red [255, 0, 0]) corresponding to the evaluation quantization value [0, 1] is established. The specific calculation process is as follows:

[0063] Suppose the evaluation value Q of the abnormality degree of a certain behavior monitoring unit at a certain period of time t , and the color value is [r, g, 0]. The distance between Q t and 0 is l1, and the distance between Q t and 1 is l2.

[0064]

[0065] The evaluation value Q of the abnormality degree of a certain behavior monitoring unit at a certain period of time t corresponds to the color value

[0066] Step S17: In the visualization scenario, according to the evaluation values of the behavior monitoring units in Step S16, colors are assigned to the BIMs of each behavior monitoring unit of the dam respectively to establish an overall service behavior cloud map of the dam. The overall service behavior of the dam at a certain moment t is visually represented by colors and is input and displayed on the device display screen of the service behavior rendering module 107.​< / t>

Claims

1. A BIM-based construction system for the service behavior characteristics of concrete dams, characterized in that The system includes: (1) A dam behavior monitoring unit reading module for reading the BIM model of the concrete dam with layered and segmented blocks; (2) A monitoring unit attribute adding module for adding attribute information to the dam behavior monitoring unit based on BIM. The attribute information includes ID coding, dam section, upper and lower boundary elevations, centroid point coordinates of the unit, and safety monitoring instrument ID; (3) A monitoring instrument BIM model component construction module for constructing the BIM model components of the monitoring instrument according to the three-dimensional coordinates of the safety monitoring instrument in the dam behavior monitoring unit and adding attribute information. The attribute information includes measuring point number and instrument type coding; (4) A monitoring effect quantity calculation module for calculating the equivalent monitoring effect quantity of the centroid point of the dam behavior monitoring unit; (5) A monitoring effect quantity analysis module for analyzing the abnormal states of various monitoring types in the dam behavior monitoring unit; (6) An abnormal degree evaluation module for calculating the evaluation value of the abnormal degree of the dam behavior monitoring unit; (7) A service behavior rendering module for three-dimensional color rendering of the behavior of each monitoring unit during the dam's service.

2. The BIM-based construction system for the service behavior characteristics of concrete dams according to claim 1, characterized in that The dam behavior monitoring unit reading module includes: A user operation instruction receiving module: receiving the BIM model of the concrete dam established by the user according to the dam structure design and construction drawings using Revit software; A dam behavior monitoring unit reading module: detecting whether there is a user-triggered data input device event. If it is detected that there is a user-triggered input device event, generating the dam behavior monitoring unit based on BIM on the device display according to transverse joints, longitudinal joints, induced joints, and construction joints; A monitoring unit attribute adding module: the user adding the attribute information of ID coding, dam section, upper and lower boundary elevations, centroid point coordinates of the unit, and safety monitoring instrument ID to the dam behavior monitoring unit and storing it in the model data storage device; A monitoring instrument BIM model component construction module: constructing the BIM model components of the monitoring instrument according to the three-dimensional coordinates of the safety monitoring instrument in the dam behavior monitoring unit, adding the attribute information of measuring point number and instrument type coding, and storing it in the model data storage device; A monitoring effect quantity calculation module: taking the dam behavior monitoring unit as the calculation object, calculating the equivalent monitoring effect quantity of the centroid point of the dam behavior monitoring unit at different times according to its centroid point coordinates and the layout of the monitoring points in the dam structure, including deformation monitoring effect quantity, seepage monitoring effect quantity, stress and strain monitoring effect quantity, and temperature monitoring effect quantity, forming a sequence of equivalent monitoring effect quantities of the centroid point of the behavior monitoring unit and storing it in the model data storage device; A monitoring effect quantity analysis module: establishing a probability distribution function F(x), analyzing the abnormal state of the sequence of equivalent monitoring effect quantities of the centroid point of the behavior monitoring unit using the 3σ criterion, and storing the abnormal state in the model data storage device; Abnormality degree evaluation module: Using expert knowledge, weight values are assigned to each type of monitoring instrument in the behavior monitoring unit area to form a weight matrix. At a certain moment t, the 3σ criterion is used to evaluate the abnormal state of the data of each instrument type in the monitoring unit to form an evaluation state matrix. By multiplying the weight matrix and the evaluation state matrix, the abnormality degree evaluation value Q of the monitoring unit can be obtained and stored in the model data storage device. Service behavior rendering module: Establish a mapping relationship between the evaluation value Q and colors, assign colors to the BIM of each behavior monitoring unit of the dam, and achieve three-dimensional rendering.

3. A method for implementing the BIM-based concrete dam service behavior characteristic construction system described in claim 1 or 2, characterized in that, This method includes: (1) Dam behavior monitoring unit reading step: Read the fine BIM model of the concrete dam with stratified and segmented blocks. (2) Monitoring unit attribute adding step: Add attribute information to the dam behavior monitoring unit based on BIM. The attribute information includes ID coding, dam section, upper and lower boundary elevations, coordinates of the centroid point of the unit, ID of the safety monitoring instrument, etc. (3) Monitoring instrument BIM model component construction step: In the dam behavior monitoring unit, construct the BIM model component of the monitoring instrument according to the three-dimensional coordinates of the safety monitoring instrument, and add attribute information, including the measuring point number and instrument type coding. (4) Monitoring effect quantity calculation step: Calculate the equivalent monitoring effect quantity of the centroid point of the dam behavior monitoring unit. (5) Monitoring effect quantity analysis step: Analyze the abnormal state of a certain type of monitoring in the dam behavior monitoring unit. (6) Abnormality degree evaluation step: Calculate the abnormality degree evaluation value of the dam behavior monitoring unit. (7) Service behavior rendering step: Establish a mapping relationship between the evaluation value and colors, and perform three-dimensional color rendering on the behaviors of each monitoring unit during the service of the dam.

4. The method for constructing a system for service performance characteristics of a concrete dam based on BIM according to claim 3, characterized in that, The specific implementation process of (1) is as follows: Read the dam behavior monitoring unit. The monitoring unit uses Revit software to establish the BIM model of the concrete dam according to the dam structure design and construction drawings; according to the concrete dam construction organization design plan, divide and block the dam structure by transverse joints, longitudinal joints, and induced joints to construct the BIM model of the concrete dam with dam sections and dam blocks as units; combined with the actual pouring situation of the concrete dam, further refine and divide the completed fine BIM model of the dam by construction joints to construct a more refined structural unit.

5. The method for constructing a system for the service behavior characteristics of a concrete dam based on BIM according to claim 3, characterized in that, The centroid point coordinates O(x o , y o , z o ) of the BIM-based dam behavior monitoring unit in (2) are calculated as follows: Among them, μ(x, y, z) represents the concrete pouring density of the dam behavior monitoring unit based on BIM, and is taken as a constant μ according to the actual construction. Therefore, the centroid of the monitoring unit is the centroid; V is the volume of the monitoring unit; The attribute information added to the dam behavior monitoring unit based on BIM stores the ID code of the safety monitoring instrument and forms a List <t>of the set. < / t> 6. The method for constructing a system for the service state characteristics of a concrete dam based on BIM according to claim 3, characterized in that, In (3), according to the two-dimensional layout drawing of the safety monitoring instrument in the construction drawing stage, extract the dam transverse, dam longitudinal, and elevation information of the safety monitoring instrument, and convert it to the local coordinate system of the dam BIM model; when the positive directions of the dam transverse and dam longitudinal are consistent with the positive directions of the local coordinate system of the dam BIM model, the coordinates of the safety monitoring instrument are (x = dam transverse, y = dam longitudinal, z = elevation); when the positive directions of the dam transverse and dam longitudinal are inconsistent with the positive directions of the local coordinate system of the dam BIM model, the coordinates of the safety monitoring instrument are processed according to the actual rotation and translation, and the specific processing is as follows: x = x′cosθ + y′sinθ + a y = y′cosθ - x′sinθ + b Where x′ and y′ are the horizontal and vertical directions of the safety monitoring instrument in the construction drawings, x and y are the coordinates in the local coordinate system of the dam BIM model, θ, a, and b represent the counterclockwise rotation angle, x-axis translation, and y-axis translation of the local coordinate system of the dam BIM model when the horizontal and vertical directions of the dam are transformed, respectively.

7. The method for constructing a system for the service behavior characteristics of a concrete dam based on BIM according to claim 3, characterized in that, In the above (4), the dam performance monitoring unit is taken as the calculation object, and the equivalent monitoring effect of the centroid point of the dam performance monitoring unit is calculated according to the coordinates of the centroid point and the arrangement of the monitoring points in the dam structure. The monitoring effect includes the deformation monitoring effect, the seepage monitoring effect, the stress-strain monitoring effect, and the temperature monitoring effect. When there are multiple monitoring instruments in the dam behavior monitoring unit, during the calculation, the monitoring instruments in the behavior monitoring unit are classified by type, and the distances dij from each monitoring point to the centroid point in each type of monitoring instrument are calculated respectively. At a certain moment t, the effect quantity values of each monitoring point [A i0 , A i1 , ……, A ij , and the inverse distance weighted interpolation algorithm is used to find the effect quantity A io ; where (x o , y o , z o ) represents the coordinates of the centroid point O of the monitoring unit, (x ij , y ij , z ij ) represents the coordinates of the j-th monitoring point in the i-th type of monitoring instrument, and n represents the number of types of monitoring instruments in the behavior monitoring unit; When the dam performance monitoring unit contains only one monitoring instrument, the monitoring effect value of the monitoring instrument is directly regarded as the monitoring effect value at the centroid of the monitoring unit; When the dam performance monitoring unit does not contain monitoring instruments, the monitoring effect quantity at the centroid of the adjacent monitoring unit is selected, and the monitoring effect quantity of the centroid of the current monitoring unit is calculated using the inverse distance weighted interpolation algorithm.

8. The method for constructing a system for characterizing the service behavior of a concrete dam based on BIM according to claim 3, characterized in that In (5), for a certain type of monitoring effect quantity sequence of the centroid point of the state monitoring unit within a certain period of time, a polynomial function F(x) is used for fitting calculation, the difference ΔF(x) between the measured value and the predicted value is statistically calculated, and the expected E and standard deviation σ are calculated; According to the expected value E, the abnormal state of a certain monitoring type in the performance monitoring unit is defined: |E|≤3σ represents normal, and |E|>3σ represents abnormal.

9. The method for constructing a system for the service behavior characteristics of a concrete dam based on BIM according to claim 3, characterized in that, In (6), expert knowledge is used to assign weight values to each monitoring instrument type in the behavior monitoring unit area, forming a weight matrix [w1, w2, …, w n for each monitoring instrument type in this area, and after normalization processing. At a certain moment, the monitoring effect quantity sequences of each instrument type in this monitoring unit are evaluated using the monitoring type abnormal state analysis method, forming an evaluation state matrix [a1, a2, …, a k . By multiplying the weight matrix and the evaluation state matrix, the abnormal degree evaluation value Q of this unit can be obtained, and the evaluation attribute information of the dam behavior monitoring unit at the current moment is updated, and the abnormal degree evaluation value of the dam behavior monitoring unit is mapped in real time; Q = [a1, a2, …, a k *[w1, w2, …, w k -1 ​ where a k represents the evaluation status of the k-th measurement point, with 1 indicating abnormality and 0 indicating normality; w k represents the weight of the k-th measurement point, ranging from 0 to 1.

10. The method for constructing a system for service performance characteristics of a concrete dam based on BIM according to claim 3, characterized in that According to the abnormality evaluation value Q of each state monitoring unit at a certain time, which ranges from 0 to 1, a color change mapping relationship corresponding to the evaluation quantization value [0,1] is established. The specific calculation process is as follows: Let the abnormal degree evaluation value Q of a certain state monitoring unit at a certain moment t , with the color value [r, g, 0], and the distance between Q t and 0 is l1, and the distance between Q t and 1 is l2; The abnormal degree evaluation value Q of a certain state monitoring unit at a certain moment t The corresponding color value is In the visualization scene, each BIM of the dam's performance monitoring units is colored according to the evaluation value of the performance monitoring unit, and a service performance cloud map of the entire dam is established, using color to intuitively represent the overall service performance of the dam at a certain time t.

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