A deformation evaluation method for special-shaped steel structures based on the association of monitoring point data

Abstract

The present invention discloses a method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data, belonging to the field of evaluating the deformation of special-shaped steel structures. The method includes obtaining the three-dimensional coordinates of all temporary support points arranged on the special-shaped steel structure; dividing the space of the special-shaped steel structure based on the three-dimensional coordinates of each temporary support point to obtain several space surfaces of the steel structure to be measured; modeling the special-shaped steel structure and using simulation technology to simulate the responses under different working conditions to obtain the deformation conduction relationships on each space surface of the steel structure to be measured; taking the boundary points and temporary support points on each space surface of the steel structure to be measured as monitoring points, collecting the deformation data at each monitoring point, and completing the evaluation of the deformation of the special-shaped steel structure based on the deformation conduction relationships on each space surface of the steel structure to be measured. The present invention solves the problem that the existing methods do not consider that the deformations between connection points will affect each other.

Description

Technical Field

[0001] The present invention belongs to the field of deformation evaluation of special-shaped steel structures, and particularly relates to a method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data. Background Art

[0002] With the continuous development of the construction industry, the architectural forms and structural types are becoming increasingly complex and diverse. Due to their unique shapes and good mechanical properties, special-shaped steel structures have been widely used in public buildings such as large stadiums, exhibition halls, airport terminals, and some landmark buildings. These special-shaped steel structures often have characteristics such as irregular shapes, complex spatial structures, and large spans. Traditional structural deformation evaluation methods are difficult to directly apply, and it is necessary to develop specialized evaluation technologies according to their characteristics.

[0003] The deformation of steel structures is directly related to the safety and stability of the structures. Excessive deformation may lead to stress concentration in structural members, reduce the load-bearing capacity of the structures, and even cause structural failure and safety accidents. For special-shaped steel structures, due to their complex structural forms, the potential deformation risks are higher. Therefore, more accurate and reliable deformation evaluation technologies are needed to ensure the safety of the structures.

[0004] During the engineering quality acceptance and the use process, there are also strict requirements for the control of the deformation of steel structures. Accurately evaluating the deformation of special-shaped steel structures helps to timely detect quality problems during the construction process, and monitor and evaluate the health status of the structures during the use stage, ensuring the normal use and durability of the structures.

[0005] In recent years, advanced measurement means such as laser measurement technology, total station measurement technology, three-dimensional laser scanning technology, and digital image correlation technology have emerged and developed continuously, providing more accurate and efficient data acquisition methods for the deformation evaluation of special-shaped steel structures. These technologies can quickly obtain the three-dimensional coordinate information on the surface of the structures, accurately measure the deformation amount and deformation distribution of the structures, and provide rich data support for the deformation evaluation.

[0006] The progress of sensor technology enables various types of sensors, such as strain sensors and displacement sensors, to be installed in the structures to achieve real-time monitoring of the structural deformation. Through the real-time data obtained by the sensor network, the deformation of the structures under different working conditions can be timely grasped, providing a powerful technical means for the deformation evaluation and structural health monitoring. Summary of the Invention

[0007] Aiming at the above deficiencies in the prior art, a method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data provided by the present invention solves the problem that the existing methods do not consider the mutual influence of the deformations between connection points.

[0008] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows: A method for evaluating the deformation of a special-shaped steel structure based on the association of monitoring point data, comprising:

[0009] Obtain the three-dimensional coordinates of all temporary support points arranged on the special-shaped steel structure;

[0010] Based on the three-dimensional coordinates of each temporary support point, perform spatial surface division on the special-shaped steel structure to obtain several spatial surfaces of the steel structure to be measured;

[0011] Build a model of the special-shaped steel structure, use simulation technology to simulate the responses under different working conditions, and obtain the deformation conduction relationship on each spatial surface of the steel structure to be measured;

[0012] Take the boundary points and temporary support points on each spatial surface of the steel structure to be measured as monitoring points, collect the deformation data at each monitoring point, and complete the deformation evaluation of the special-shaped steel structure based on the deformation conduction relationship on each spatial surface of the steel structure to be measured.

[0013] Further, the performing spatial surface division on the special-shaped steel structure based on the three-dimensional coordinates of each temporary support point to obtain several spatial surfaces of the steel structure to be measured is specifically as follows:

[0014] Uniformly set several boundary points on the edge of the special-shaped steel structure, and obtain the slopes and three-dimensional coordinates of the cutting planes where each boundary point and temporary support point are located;

[0015] According to the three-dimensional coordinates of each boundary point and temporary support point, use the DBSCAN density clustering algorithm for clustering to obtain several dense cluster classes;

[0016] According to the slopes of the cutting planes where each boundary point and temporary support point are located, judge whether the maximum slope difference in each dense cluster class is greater than the difference threshold. If so, label the current dense cluster class as a re-clustering class; otherwise, label the current dense cluster class as a final cluster class;

[0017] For the re-clustering class, based on the slopes of the cutting planes where each boundary point and temporary support point are located, use the K-means clustering algorithm for clustering to obtain the cluster class subsets of the re-clustering class;

[0018] Based on the final cluster class and the cluster class subsets of the re-clustering class, perform spatial surface division to obtain several spatial surfaces of the steel structure to be measured.

[0019] Further, each spatial surface of the steel structure to be measured includes the spatial surface divided based on the final cluster class and the cluster class subsets, and the closed spatial surface on the remaining part of the special-shaped steel structure after the division of the final cluster class and the cluster class subsets is completed.

[0020] Further, the constraint conditions for the spatial surface divided based on the final cluster class and the cluster class subsets are:

[0021]

[0022] Among them, is the area of the spatial surface obtained by partitioning based on the final cluster or a subset of clusters; is the maximum value function; is the th point selected as the graphic boundary; is from the area of the closed graphic formed by connecting points; is the complement of, and the universal set is ; is the point cloud set of the surface of the special-shaped steel structure included in the spatial surface obtained by partitioning based on the final cluster or a subset of clusters.

[0023] Furthermore, for modeling the special-shaped steel structure and using simulation technology to simulate the responses under different working conditions to obtain the deformation conduction relationship on the spatial surface of each steel structure to be measured, specifically:

[0024] A1. Construct the three-dimensional topological structure of the spatial surface of each steel structure to be measured according to the connection points and connection relationships of the spatial surface of each steel structure to be measured;

[0025] A2. Take the boundary points and temporary support points on the three-dimensional topological structure of the spatial surface of each steel structure to be measured as reference points, and the points other than the reference points as connection points;

[0026] A3. Model the special-shaped steel structure and use simulation technology to simulate the responses under different working conditions to obtain the deformation data of each reference point and each connection point on the spatial surface of each steel structure to be measured under different working conditions. Take the deformation data of each connection point on the spatial surface of each steel structure to be measured under different working conditions as the deformation relationship verification data set, and take the deformation data of each reference point on the spatial surface of each steel structure to be measured under different working conditions as the basic deformation data set;

[0027] A4. Obtain the current spatial surface of the steel structure to be measured;

[0028] A5. According to the three-dimensional topological structure of the current spatial surface of the steel structure to be measured, obtain the connection relationship between each connection point and the reference point:

[0029]

[0030] Among them, is the connection relationship between the th connection point and the reference point; is the th connection point to the The connection step length of a benchmark point, where the connection step length is the minimum number of edges that a connection point on the three-dimensional topological structure of the current steel structure space to be measured has to pass through to reach the benchmark point;

[0031] A6. Initialize the deformation conduction equation based on time evolution;

[0032] A7. According to the deformation relationship verification data set and the basic deformation data set, extract several groups of deformation data without external environmental influence and with different operating times, and quantify the deformation conduction under natural loss of the current steel structure space surface to be measured based on the connection relationship between each connection point and the benchmark point:

[0033]

[0034] Among them, is the deformation conduction under natural loss of the current steel structure space surface to be measured, representing the deformation conduction per unit time per single step length under natural loss; is the single-step length loss conduction of the th group of deformation data without external environmental influence and with different operating times; is the number of the deformation data without external environmental influence and with different operating times, sorted in ascending order according to the operating time from short to long; is the total number of samples of the deformation data without external environmental influence and with different operating times; is the single-step length loss conduction of the first group of deformation data without external environmental influence and with different operating times; is the th group of deformation data without external environmental influence and with different operating times; is the operating time of the first group of deformation data without external environmental influence and with different operating times; is the total number of benchmark points; is the th connection point to the th benchmark point; is the total number of connection points; is the th group of deformation data without external environmental influence and with different operating times, the th connection point's deformation; is the th group of deformation data without external environmental influence and with different operating times, the th benchmark point's deformation;

[0035] A8. According to the deformation relationship verification data set and the basic deformation data set, extract groups of deformation data sample sets with the same operating duration as but with external environmental influence, and obtain the deformation conduction of the current steel structure space surface to be measured under the influence of environmental factors;

[0036] A9. Based on the basic deformation samples in the basic deformation dataset, use the deformation conduction equation based on time evolution to predict the deformations of each connection point, and verify the dataset according to the deformation relationship to calculate the deformation prediction error;

[0037] A10. Determine whether the deformation prediction error is less than the error threshold. If so, return to predict the next basic deformation sample. Otherwise, update the deformation conduction equation based on time evolution according to the deformation conduction under the natural loss of the current steel structure space surface to be measured and the deformation conduction of the current steel structure space surface affected by environmental factors, and return to step A7 until the deformation prediction error of each sample in the deformation relationship training dataset is less than the error threshold, and then enter step A11;

[0038] A11. Take the deformation conduction equation based on time evolution as the deformation conduction relationship on the current steel structure space surface to be measured;

[0039] A12. Return to step A4 until the deformation conduction relationships of all steel structure space surfaces to be measured are obtained.

[0040] Furthermore, the expression of the deformation conduction equation based on time evolution in A6 is:

[0041]

[0042] where is the deformation conduction equation based on time evolution, indicating the deformation conduction of each reference point on the current steel structure space surface to be measured to the th connection point; is the total number of reference points; is the deformation influence coefficient of the th reference point on the th connection point; is the deformation of the th reference point; is the number of adjacent connection points on the shortest connection path between the th connection point and the th reference point; is the deformation influence coefficient of the th adjacent connection point on the th connection point; is the deformation conduction of each reference point on the current steel structure space surface to be measured to the th adjacent connection point.

[0043] Furthermore, the expression of the deformation conduction of the current steel structure space surface to be measured affected by environmental factors in A8 is:

[0044]

[0045] Among them, is the deformation conduction of the current steel structure spatial surface to be measured under the influence of environmental factors, representing the deformation conduction of a single step length per unit time under the influence of environmental factors; is the single-step environmental loss conduction of the th sample in; is the operation duration and the total number of samples in the deformation data set with the same operation duration but under the influence of the external environment; is the sample number in; is the deformation of the th connection point in the th sample; is the deformation of the th reference point in the th sample; is the number of unit time durations included in the operation duration .

[0046] Furthermore, the expression of the deformation prediction error in A9 is:

[0047]

[0048] Among them, is the deformation prediction error; is the normalization function; is the deformation conduction equation based on time evolution, representing the deformation conduction of each reference point on the current steel structure spatial surface to be measured to the th connection point; is the th true deformation of the connection point.

[0049] Furthermore, the expression of the updated deformation conduction equation based on time evolution in A10 is:

[0050]

[0051]

[0052] Among them, is the updated deformation conduction equation based on time evolution, representing the deformation conduction of each reference point on the updated current steel structure spatial surface to the th connection point; is the deformation influence coefficient of the updated th reference point to the th connection point; is the The deformation of a reference point; For the number of adjacent connection points on the shortest connection path between the th connection point and the th reference point; For the influence coefficient of the deformation of the th adjacent connection point pair on the th connection point after update; For the deformation conduction of each reference point on the spatial surface of the steel structure to be measured currently to the th adjacent connection point; For the influence coefficient of the deformation of the th reference point on the th connection point; For the true deformation of the th connection point corresponding to the th basic deformation sample in the deformation relationship verification dataset; For the predicted deformation of the th connection point under the th basic deformation sample; For the adjustment coefficient of deformation conduction under natural loss; For the adjustment coefficient of deformation conduction under the influence of environmental factors; For the deformation conduction of the spatial surface of the steel structure to be measured currently under the influence of environmental factors, indicating the deformation conduction per unit time per single step length under the influence of environmental factors; For the influence coefficient of the deformation of the th adjacent connection point pair on the th connection point after update; For the influence coefficient of the deformation of the th reference point on the th connection point after update; For the influence coefficient of the deformation of the th reference point on the th adjacent connection point;

[0053] Furthermore, take the boundary points and temporary support points on the spatial surface of each steel structure to be measured as monitoring points, collect the deformation data at each monitoring point, and complete the deformation assessment of the special-shaped steel structure based on the deformation conduction relationship on the spatial surface of each steel structure to be measured. Specifically:

[0054] Collect the deformation data of each monitoring point, and based on the deformation data of each monitoring point and using the deformation conduction relationship on the spatial surface of each steel structure to be measured, obtain the deformation data of all connection points on the spatial surface of each steel structure to be measured;

[0055] Based on the deformation data of all connection points on the spatial surface of the steel structure to be measured, and based on the preset threshold of the severe deformation level of the connection points, the deformation evaluation of the special-shaped steel structure is completed.

[0056] The beneficial effects of the present invention are as follows: The present invention conducts the first spatial surface division of the special-shaped steel structure based on the density of the temporary support points and the boundary points, and then conducts the second division based on the section slope, so that the undulation of the divided spatial surface is maintained within a certain range, which can maximize the control of the influence relationship of each connection point within a single spatial surface and avoid the errors caused by the special-shaped undulation; at the same time, the monitoring points, that is, the boundary points and the temporary support points, are emphasized for their influence on each connection point, and the influence of adjacent connection points is also introduced, which can improve the deformation prediction accuracy of each connection point and reduce the workload of actual deformation measurement. Description of the Drawings

[0057] Figure 1 It is the flowchart of the method of the present invention. Detailed Embodiments

[0058] The following describes the detailed embodiments of the present invention to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the detailed embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0059] As Figure 1 shown, in an embodiment of the present invention, a method for evaluating the deformation of a special-shaped steel structure based on the correlation of monitoring point data includes:

[0060] Obtain the three-dimensional coordinates of all temporary support points arranged on the special-shaped steel structure;

[0061] Based on the three-dimensional coordinates of each temporary support point, conduct a spatial surface division of the special-shaped steel structure to obtain several spatial surfaces of the steel structure to be measured;

[0062] Build a model of the special-shaped steel structure, use simulation technology to simulate the responses under different working conditions, and obtain the deformation conduction relationship on each spatial surface of the steel structure to be measured;

[0063] Take the boundary points and temporary support points on each spatial surface of the steel structure to be measured as monitoring points, collect the deformation data at each monitoring point, and complete the deformation evaluation of the special-shaped steel structure based on the deformation conduction relationship on each spatial surface of the steel structure to be measured.

[0064] The step of conducting a spatial surface division of the special-shaped steel structure based on the three-dimensional coordinates of each temporary support point to obtain several spatial surfaces of the steel structure to be measured is specifically:

[0065] Uniformly set a number of boundary points on the edge of the special-shaped steel structure, and obtain the slopes and three-dimensional coordinates of the sections where each boundary point and the temporary support point are located;

[0066] According to the three-dimensional coordinates of each boundary point and the temporary support point, use the DBSCAN density clustering algorithm for clustering to obtain a number of dense cluster classes;

[0067] According to the slopes of the sections where each boundary point and the temporary support point are located, judge whether the maximum slope difference in each dense cluster class is greater than the difference threshold. If so, label the current dense cluster class as a sub-cluster class to be reclustered; otherwise, label the current dense cluster class as the final cluster class;

[0068] For the sub-cluster class to be reclustered, based on the slopes of the sections where each boundary point and the temporary support point are located, use the K-means clustering algorithm for clustering to obtain the cluster subset of the sub-cluster class to be reclustered;

[0069] Based on the final cluster class and the cluster subset of the sub-cluster class to be reclustered, perform spatial surface division to obtain a number of spatial surfaces of the steel structure to be measured.

[0070] In this embodiment, the purposes of the two divisions are respectively: to ensure the strong correlation of the support points in the same spatial surface; and to ensure that the undulation degree of the same spatial surface is within a controllable range.

[0071] Each of the spatial surfaces of the steel structure to be measured includes the spatial surface divided based on the final cluster class and the cluster subset, and the closed spatial surface on the remaining part of the special-shaped steel structure after the division of the final cluster class and the cluster subset.

[0072] The constraint conditions for the spatial surface divided based on the final cluster class and the cluster subset are:

[0073]

[0074] Among them, is the area of the spatial surface divided based on the final cluster class or the cluster subset; is the maximum value function; is the th point selected as the graphic boundary; is composed of the area of the closed graphic formed by connecting points; is the final cluster class or the cluster subset; is the complement of, and the universal set is ; is the point cloud set of the surface of the special-shaped steel structure included in the spatial surface divided based on the final cluster class or the cluster subset.

[0075] Model the special-shaped steel structure, use simulation technology to simulate the responses under different working conditions, and obtain the deformation conduction relationship on the spatial surface of each steel structure to be measured. Specifically:

[0076] A1. Construct the three-dimensional topological structure of the spatial surface of each steel structure to be measured according to the connection points and connection relationships of the spatial surface of each steel structure to be measured;

[0077] A2. Take the boundary points and temporary support points on the three-dimensional topological structure of the spatial surface of each steel structure to be measured as reference points, and the points other than the reference points as connection points;

[0078] A3. Model the special-shaped steel structure, use simulation technology to simulate the responses under different working conditions, obtain the deformation data of each reference point and each connection point on the spatial surface of each steel structure to be measured under different working conditions, use the deformation data of each connection point on the spatial surface of each steel structure to be measured under different working conditions as the deformation relationship verification data set, and use the deformation data of each reference point on the spatial surface of each steel structure to be measured under different working conditions as the basic deformation data set;

[0079] A4. Obtain the current spatial surface of the steel structure to be measured;

[0080] A5. According to the three-dimensional topological structure of the current spatial surface of the steel structure to be measured, obtain the connection relationship between each connection point and the reference point:

[0081]

[0082] Among them, is the connection relationship between the th connection point and the reference point; is the connection step length from the th connection point to the th reference point. The connection step length is the minimum number of edges that a connection point on the three-dimensional topological structure of the current spatial surface of the steel structure to be measured has to pass through to reach the reference point;

[0083] A6. Initialize the deformation conduction equation based on time evolution;

[0084] A7. According to the deformation relationship verification data set and the basic deformation data set, extract several groups of deformation data without external environmental influence and with different operating times, and quantify the deformation conduction under natural loss of the current spatial surface of the steel structure to be measured based on the connection relationship between each connection point and the reference point:

[0085]

[0086] Among them, is the deformation conduction under natural loss of the current spatial surface of the steel structure to be measured, indicating the deformation conduction per unit time per single step length under natural loss; is the Single-step loss conduction of deformation data groups without external environmental influence and with different operating times; The number of deformation data without external environmental influence and with different operating times, sorted in ascending order according to the operating time from short to long; The total number of samples of deformation data without external environmental influence and with different operating times; The single-step loss conduction of the first group of deformation data without external environmental influence and with different operating times; For the Operating time of the deformation data group without external environmental influence and with different operating times; The operating time of the first group of deformation data without external environmental influence and with different operating times; The total number of reference points; For the Connection step length from the th connection point to the Total number of connection points; For the Deformation of the th connection point in the deformation data group without external environmental influence and with different operating times; For the Deformation of the th reference point in the deformation data group without external environmental influence and with different operating times;

[0087] A8. According to the deformation relationship verification data set and the basic deformation data set, extract Groups of deformation data samples with the same operating duration as but with external environmental influence, and obtain the deformation conduction of the current steel structure space surface to be measured under the influence of environmental factors;

[0088] A9. According to the basic deformation samples in the basic deformation data set, use the deformation conduction equation based on time evolution to predict the deformation of each connection point, and calculate the deformation prediction error according to the deformation relationship verification data set;

[0089] A10. Judge whether the deformation prediction error is less than the error threshold. If so, return to predict the next basic deformation sample. Otherwise, update the deformation conduction equation based on time evolution according to the deformation conduction under the natural loss of the current steel structure space surface to be measured and the deformation conduction of the current steel structure space surface to be measured under the influence of environmental factors, and return to step A7 until the deformation prediction error of each sample in the deformation relationship training data set is less than the error threshold, and enter step A11;

[0090] A11. Take the deformation conduction equation based on time evolution as the deformation conduction relationship on the current steel structure space surface to be measured;

[0091] A12. Return to step A4 until the deformation conduction relationships of all the spatial surfaces of the steel structures to be measured are obtained.

[0092] In this embodiment, each spatial surface has a deformation conduction relationship. This is because the mutual influence between the connection points and support points at a long distance in a large steel structure is limited. Therefore, after the spatial surface is divided, only the data of the current spatial surface is extracted to solve the deformation relationship, which can ensure the accuracy of the deformation conduction relationship to the greatest extent.

[0093] In this embodiment, during the iteration process the value of is indefinite. That is, in each iteration, the total number of samples of the deformation data without external environmental influence and with different operation times can vary. The larger the total number of samples, the better the final prediction accuracy. However, if the total number of samples is too large, the computational complexity will increase and the efficiency will decrease. Therefore, setting it to be variable here can gradually balance the accuracy and efficiency during the solution process. In addition, each sample is reselected.

[0094] The expression of the deformation conduction equation based on time evolution in A6 is:

[0095]

[0096] Among them, is the deformation conduction equation based on time evolution, indicating the deformation conduction of each reference point on the current spatial surface of the steel structure to be measured to the th connection point; is the total number of reference points; is the th reference point's deformation influence coefficient on the th connection point; is the th reference point's deformation; is the th connection point's number of adjacent connection points on the shortest connection path with the th reference point; is the th adjacent connection point's deformation influence coefficient on the th connection point; is the deformation conduction of each reference point on the current spatial surface of the steel structure to be measured to the th adjacent connection point.

[0097] The expression of the deformation conduction of the current spatial surface of the steel structure to be measured under the influence of environmental factors in A8 is:

[0098]

[0099] Among them, It represents the deformation conduction of the current steel structure spatial surface under the influence of environmental factors, indicating the deformation conduction per unit time and per unit step length under the influence of environmental factors; is the single-step environmental loss conduction of the th sample; is the number of samples in the deformation data sample set with the same operation duration as but with external environmental influence; is the sample number in is the deformation of the th connection point in the th sample; is the deformation of the th reference point in the th sample; is the number of unit time intervals included in the operation duration ;

[0100] The expression for the deformation prediction error in A9 is:

[0101]

[0102] where is the deformation prediction error; is the normalization function; is the deformation conduction equation based on time evolution, indicating the deformation conduction of each reference point on the current steel structure spatial surface to the th connection point; is the th connection point's true deformation.

[0103] The expression for the updated deformation conduction equation based on time evolution in A10 is:

[0104]

[0105]

[0106] where is the updated deformation conduction equation based on time evolution, indicating the deformation conduction of each reference point on the updated current steel structure spatial surface to the th connection point; is the deformation influence coefficient of the th reference point on the th connection point; is the deformation of the th reference point; is the The number of adjacent connection points on the shortest connection path between a connection point and the th reference point; After update, the deformation influence coefficient of the th adjacent connection point pair on the th connection point; The deformation conduction of each reference point on the spatial surface of the steel structure to be measured currently to the th adjacent connection point; The deformation influence coefficient of the th reference point on the th connection point; The th basic deformation sample corresponds to the true deformation of the th connection point in the deformation relationship verification dataset; The th predicted deformation of the th connection point under the th basic deformation sample; The adjustment coefficient of deformation conduction under natural loss; The adjustment coefficient of deformation conduction under the influence of environmental factors; The deformation conduction of the spatial surface of the steel structure to be measured currently under the influence of environmental factors, indicating the deformation conduction per unit time and per unit step length under the influence of environmental factors; The deformation influence coefficient of the th adjacent connection point pair on the th connection point; After update, the deformation influence coefficient of the th reference point on the th connection point; The deformation influence coefficient of the th reference point on the th adjacent connection point;

[0107] In this embodiment, since the adjacent connection points have been updated once based on the deformation conduction under environmental loss and the deformation conduction under natural loss, and this update itself will be applied to the current connection points, the adjustment step length of the adjacent connection point influence coefficient is actually a relatively small value.

[0108] Taking the boundary points and temporary support points on each spatial surface of the steel structure to be measured as monitoring points, collecting the deformation data at each monitoring point, and completing the deformation evaluation of the special-shaped steel structure based on the deformation conduction relationship on each spatial surface of the steel structure to be measured, specifically:

[0109] Collecting the deformation data of each monitoring point, and based on the deformation data of each monitoring point and using the deformation conduction relationship on each spatial surface of the steel structure to be measured, obtaining the deformation data of all connection points on each spatial surface of the steel structure to be measured;

[0110] Based on the deformation data of all connection points on the spatial surface of the steel structure to be measured, and based on the preset threshold of the deformation severity level of the connection points, the deformation assessment of the special-shaped steel structure is completed.

[0111] In this embodiment, based on the solution, the deformation prediction value of each connection point is obtained. According to the preset threshold of the deformation severity level of the connection points, it is possible to confirm which connection points must be measured on-site. Therefore, the measurement workload can be greatly reduced, and the preliminary estimation before the quality inspection of the special-shaped steel structure can be completed.

Claims

1. A method for evaluating the deformation of special-shaped steel structures based on the association of monitoring point data, characterized in that Including: Obtain the three-dimensional coordinates of all temporary support points arranged on the special-shaped steel structure; Based on the three-dimensional coordinates of each temporary support point, perform spatial surface division on the special-shaped steel structure to obtain several spatial surfaces of the steel structure to be measured; specifically: Uniformly set several boundary points on the edge of the special-shaped steel structure, and obtain the slope and three-dimensional coordinates of the section where each boundary point and temporary support point are located; According to the three-dimensional coordinates of each boundary point and temporary support point, use the DBSCAN density clustering algorithm for clustering to obtain several dense cluster classes; According to the slope of the section where each boundary point and temporary support point are located, judge whether the maximum slope difference in each dense cluster class is greater than the difference threshold. If so, label the current dense cluster class as a sub-cluster class to be re-clustered, otherwise, label the current dense cluster class as the final cluster class; For the sub-cluster class to be re-clustered, based on the slope of the section where each boundary point and temporary support point are located, use the K-means clustering algorithm for clustering to obtain the cluster subset of the sub-cluster class to be re-clustered; Based on the final cluster class and the cluster subset of the sub-cluster class to be re-clustered, perform spatial surface division to obtain several spatial surfaces of the steel structure to be measured; Model the special-shaped steel structure, and use simulation technology to simulate the responses under different working conditions to obtain the deformation conduction relationship on each spatial surface of the steel structure to be measured; Use the boundary points and temporary support points on each spatial surface of the steel structure to be measured as monitoring points, collect the deformation data at each monitoring point, and complete the deformation evaluation of the special-shaped steel structure based on the deformation conduction relationship on each spatial surface of the steel structure to be measured.

2. The method for evaluating the deformation of a special-shaped steel structure based on the correlation of monitoring point data according to claim 1, wherein Each of the spatial surfaces of the steel structure to be measured includes the spatial surfaces divided based on the final cluster class and the cluster subset, and the closed spatial surfaces on the remaining parts of the special-shaped steel structure after the division of the final cluster class and the cluster subset.

3. The method for evaluating the deformation of a special-shaped steel structure based on the correlation of monitoring point data according to claim 2, wherein The constraint conditions for the spatial surfaces divided based on the final cluster class and the cluster subset are: Among them, is the area of the spatial surface divided based on the final cluster or subset of clusters; is the maximum value function; is the th point selected as the graphic boundary; is from the area of the closed graphic formed by connecting is the final cluster or subset of clusters; is the complement of, with the universal set being ; is the point cloud set of the surface of the special-shaped steel structure included in the spatial surface divided based on the final cluster or subset of clusters.

4. The method for evaluating the deformation of special-shaped steel structures based on the association of monitoring point data according to claim 1, wherein, The specific process of modeling the special-shaped steel structure and using simulation technology to simulate the responses under different working conditions to obtain the deformation conduction relationship on each spatial surface of the steel structure to be measured is as follows: A1. According to the connection points and connection relationships of each spatial surface of the steel structure to be measured, construct the three-dimensional topological structure of each spatial surface of the steel structure to be measured; A2. Use the boundary points and temporary support points on the three-dimensional topological structure of each spatial surface of the steel structure to be measured as reference points, and the points other than the reference points as connection points; A3. Model the special-shaped steel structure, use simulation technology to simulate the responses under different working conditions, obtain the deformation data of each reference point and each connection point on each spatial surface of the steel structure to be measured under different working conditions, use the deformation data of each connection point on each spatial surface of the steel structure to be measured under different working conditions as the deformation relationship verification data set, and use the deformation data of each reference point on each spatial surface of the steel structure to be measured under different working conditions as the basic deformation data set; A4. Obtain the current spatial surface of the steel structure to be measured; A5. According to the three-dimensional topological structure of the current spatial surface of the steel structure to be measured, obtain the connection relationship between each connection point and the reference point: Among them, is the connection relationship between the th connection point and the reference point; is the connection step length from the th connection point to the th reference point. The connection step length is the minimum number of edges that a connection point on the three-dimensional topological structure of the current steel structure space to be measured needs to pass through to reach the reference point; A6. Initialize the deformation conduction equation based on time evolution; A7. According to the deformation relationship verification data set and the basic deformation data set, extract several groups of deformation data without external environmental influence and with different operating times, and quantify the deformation conduction under natural wear of the current spatial surface of the steel structure to be measured based on the connection relationship between each connection point and the reference point: Among them, is the deformation conduction under natural loss of the current spatial surface of the steel structure to be measured, representing the deformation conduction per unit time per single step length under natural loss; is the single-step loss conduction of the th group of deformation data without external environmental influence and with different operating times; is the number of deformation data without external environmental influence and with different operating times, sorted in ascending order according to the operating time from short to long; is the total number of samples of deformation data without external environmental influence and with different operating times; is the single-step loss conduction of the first group of deformation data without external environmental influence and with different operating times; is the operating time of the th group of deformation data without external environmental influence and with different operating times; is the total number of reference points; is the connection step length from the th connection point to the th reference point; is the total number of connection points; is the deformation of the th connection point in the th group of deformation data without external environmental influence and with different operating times; is the deformation of the th reference point in the th group of deformation data without external environmental influence and with different operating times; A8. Verify the deformation relationship verification dataset and the basic deformation dataset, and extract the group operation duration and the deformation data sample set with the same but affected by the external environment, and obtain the deformation conduction of the current steel structure space surface to be measured under the influence of environmental factors; A9. Based on the basic deformation samples in the basic deformation dataset, use the deformation conduction equation based on time evolution to predict the deformations of each connection point, and verify the dataset according to the deformation relationship to calculate the deformation prediction error; A10. Determine whether the deformation prediction error is less than the error threshold. If so, return to predict the next basic deformation sample. Otherwise, update the deformation conduction equation based on time evolution according to the deformation conduction under the natural loss of the current steel structure space surface to be measured and the deformation conduction of the current steel structure space surface to be measured under the influence of environmental factors, and return to step A7 until the deformation prediction error for each sample in the deformation relationship training dataset is less than the error threshold, and then enter step A11; A11. Take the deformation conduction equation based on time evolution as the deformation conduction relationship on the current steel structure space surface to be measured; A12. Return to step A4 until the deformation conduction relationships of all steel structure space surfaces to be measured are obtained.

5. The method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data according to claim 4, characterized in that, The expression of the deformation conduction equation based on time evolution in A6 is: Among them, is the deformation conduction equation based on time evolution, representing the deformation conduction of each reference point on the spatial surface of the steel structure to be measured currently to the th connection point; is the total number of reference points; is the th reference point's deformation influence coefficient on the th connection point; is the deformation of the th reference point; is the th connection point's number of adjacent connection points on the shortest connection path with the th reference point; is the th adjacent connection point's deformation influence coefficient on the th connection point; is the deformation conduction of each reference point on the spatial surface of the steel structure to be measured currently to the th adjacent connection point.

6. The method for evaluating the deformation of a special-shaped steel structure based on the correlation of monitoring point data according to claim 4, characterized in that, The expression of the deformation conduction of the current steel structure space surface to be measured under the influence of environmental factors in A8 is: Among them, represents the deformation conduction of the current steel structure spatial surface to be measured under the influence of environmental factors, indicating the deformation conduction per unit time and per single step length under the influence of environmental factors; is the single-step environmental loss conduction of the th sample in The number of samples in the deformation data set with the same operation duration as but under the influence of external environment; is the sample number in is the deformation of the th connection point in the th sample in is the deformation of the th reference point in the th sample in The number of unit time durations included in the operation duration is 7. The method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data according to claim 4, characterized in that, The expression of the deformation prediction error in A9 is: Among them, is the deformation prediction error; is the normalization function; is the deformation conduction equation based on time evolution, indicating the deformation conduction of each reference point on the current steel structure surface to be measured to the th connection point; is the th connection point's true deformation.

8. The method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data according to claim 4, wherein The expression of the updated deformation conduction equation based on time evolution in A10 is: Among them, is the updated time-evolution-based deformation conduction equation, representing the deformation conduction of each reference point on the spatial surface of the steel structure to be measured currently to the th connection point; is the deformation influence coefficient of the th reference point to the th connection point; is the deformation of the th reference point; is the number of adjacent connection points on the shortest connection path between the th connection point and the th reference point; is the deformation influence coefficient of the th adjacent connection point to the th connection point after update; is the deformation conduction of each reference point on the spatial surface of the steel structure to be measured currently to the th adjacent connection point; is the deformation influence coefficient of the th reference point to the th connection point; is the th basic deformation sample corresponding to the true deformation of the th connection point in the deformation relationship verification dataset; is the predicted deformation of the th connection point under the th basic deformation sample; is the adjustment coefficient of deformation conduction under natural loss; is the adjustment coefficient of deformation conduction under the influence of environmental factors; is the deformation conduction of the spatial surface of the steel structure to be measured currently under the influence of environmental factors, representing the deformation conduction per unit time and per single step length under the influence of environmental factors; is the deformation influence coefficient of the th adjacent connection point to the th connection point; is the deformation influence coefficient of the th reference point to the th connection point after update; is the deformation influence coefficient of the th reference point to the th adjacent connection point; is the adjustment step of the adjacent connection point influence coefficient.

9. The method for evaluating the deformation of special-shaped steel structures based on the correlation of monitoring point data according to claim 4, wherein Take the boundary points and temporary support points on each steel structure space surface to be measured as monitoring points, collect the deformation data at each monitoring point, and complete the deformation evaluation of the special-shaped steel structure based on the deformation conduction relationship on each steel structure space surface to be measured. Specifically: Collect the deformation data of each monitoring point, and based on the deformation data of each monitoring point, use the deformation conduction relationship on each steel structure space surface to be measured to obtain the deformation data of all connection points on each steel structure space surface to be measured; Based on the deformation data of all connection points on each steel structure space surface to be measured and based on the preset connection point deformation severity level threshold, complete the deformation evaluation of the special-shaped steel structure.

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