A safety analysis method for steel column structures based on finite element data model

Through the finite element data model of steel column structure safety analysis method, the problems of low accuracy and poor real-time performance of traditional evaluation methods are solved, and the accurate safety assessment of inclined steel column structure is achieved, providing scientific engineering basis and safety guarantees.

CN118965933BActive Publication Date: 2024-12-10CHENGDU CONSTR ENG GROUP CORP +1
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Patent Information

Application Number
CN202411459145.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-18
Publication Date
2024-12-10
Estimated Expiration
2044-10-18

AI Technical Summary

Technical Problem

The traditional method of building steel column structure safety assessment depends on manual inspection and empirical judgment, and there are problems such as long evaluation cycle, low accuracy and poor real-time performance, making it difficult to effectively evaluate the safety of inclined steel columns in complex stressed environments.

Method used

Using the steel column structure safety analysis method based on the finite element data model, the three-dimensional model is constructed, split into uniform evaluation sections and units, and the target load is applied for mechanical analysis, the deformation and vibration data are calculated, the deformation coefficient and vibration coefficient are evaluated, and the safety is calculated. Coefficients to evaluate structural safety.

Benefits of technology

Accurate simulation and safety evaluation of inclined steel column structures are realized, potential safety hazards can be discovered in a timely manner, scientific basis for engineering design and construction, and improved the accuracy and real-timeness of safety evaluation.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The present invention discloses a safety analysis method for a steel column structure based on a finite element model, comprising the following steps: constructing a three-dimensional model of an inclined steel column structure in a building structure, and determining the support points at both ends of the inclined steel column structure and the sub-support points in the middle; splitting the three-dimensional model surface of the inclined steel column structure into a number of uniform evaluation segments and a number of evaluation units; applying a target load to both ends of the inclined steel column structure to obtain deformation data and vibration data; evaluating the deformation focus area on the inclined steel column structure and calculating the deformation coefficient; calculating the vibration coefficient of the inclined steel column structure; calculating the safety factor of the inclined steel column structure using the deformation coefficient and the vibration coefficient, and evaluating the safety of the inclined steel column structure. The present invention provides a safety analysis method for a steel column structure based on a finite element model, which can accurately simulate the stress state of the inclined steel column under the target working condition, and provide a scientific basis for engineering design and construction.
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Description

Technical Field

[0001] The invention relates to the field of building structure safety, and in particular to a steel column structure safety analysis method based on a finite element data model. Background Art

[0002] With the rapid development of the construction industry, steel structures are widely used in high-rise buildings, bridges and other projects due to their high strength and convenient construction. However, due to factors such as geological conditions, construction errors, load changes, and the increasing complexity of building structures, more and more inclined steel columns are used. During use, the stress environment of inclined steel columns is often complex, which is also related to the overall safety of the building. Traditional safety assessment methods for steel column structures in buildings rely on manual inspection and empirical judgment, and have problems such as long assessment cycle, low accuracy, and poor real-time performance. Therefore, it is of great significance to develop a safety analysis method for steel column structures based on finite element data model. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a steel column structure safety analysis method based on a finite element model. By constructing a finite element model, the stress state of the inclined steel column under the target working condition is simulated, so as to qualitatively and quantitatively analyze and evaluate its structural safety.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A method for safety analysis of steel column structures based on a finite element data model is provided, which comprises the following steps:

[0006] S1: Construct a three-dimensional model of the inclined steel column structure in the building structure, determine the support points at both ends of the inclined steel column structure and the sub-support points in the middle, and establish a three-dimensional coordinate system in the three-dimensional model;

[0007] S2: split the three-dimensional model surface of the inclined steel column structure into a number of uniform evaluation segments, and evenly split the surface of each evaluation segment into a number of evaluation units, and obtain the coordinates of the center of each evaluation unit in the three-dimensional coordinate system;

[0008] S3: Apply target loads to both ends of the inclined steel column structure, perform mechanical analysis on the evaluation segment and evaluation unit in the finite element analysis space, and obtain deformation data corresponding to each evaluation unit and vibration data on each evaluation segment;

[0009] S4: according to the deformation amount obtained by each deformation unit, the deformation focus area on the inclined steel column structure is evaluated, and the deformation amount on the deformation focus area is calculated, and the deformation coefficient is calculated according to the deformation amount of each deformation focus area on the inclined steel column structure;

[0010] S5: Calculate the vibration coefficient of the inclined steel column structure based on the vibration data on each evaluation section;

[0011] S6: Calculate the safety factor of the inclined steel column structure using the deformation coefficient and vibration coefficient to evaluate the safety of the inclined steel column structure.

[0012] Further, step S4 includes:

[0013] S41: Count the deformation corresponding to each evaluation unit , For the v The deformation corresponding to each evaluation unit is used to set the deformation threshold that affects the safety of the inclined steel column structure. , and select the deformation unit, the deformation amount corresponding to the deformation unit is the deformation amount that affects the safety of the inclined steel column structure;

[0014] like , then the evaluation unit is a deformation unit;

[0015] like , then the evaluation unit is not a deformation unit;

[0016] S42: Obtain abnormal deformation data set , For the e The deformation amount corresponding to the deformation unit is e is the number of deformation units;

[0017] S43: Screening out abnormal deformation data sets The maximum value in , the maximum value Corresponding deformation unit i As the center, calculate the deformation unit i The distance between the other deformation units , w is the number of the deformation unit, Deformation unit w The coordinates of the distance data set are obtained , Deformation unit i With deformation unit w The distance between Deformation unit i With deformation unit i -1 distance between;

[0018] S44: According to the distance value between two adjacent evaluation units , from the distance data set D 1 Filter out the distance value Equal distance values, and the corresponding deformation unit is around the deformation uniti The surrounding deformation unit , deformation unit and deformation unit i Located in the same deformation focus area;

[0019] S45: Filter out all deformation units Then, return to step S43 and use the deformation unit Replace deformation unit i , and the deformation unit The corresponding deformation amount is obtained from the abnormal deformation data set , to form a new abnormal deformation data set, and then perform steps S43-S44 to filter out the deformation units. All surrounding deformation units ;

[0020] S46: After all deformation units in the same deformation focus area are obtained, the abnormal deformation data corresponding to all deformation units in the same deformation focus area are obtained. Calculate the deformation coefficient of the deformation focus area , , The first v The deformation amount corresponding to the deformation unit is v is the number of deformation units in the same deformation focus area;

[0021] ;

[0022] in, The first a The deformation amount corresponding to the deformation unit is a is the number of the deformation unit in the same deformation focus area, k 1 is the influence weight of deformation on deformation coefficient, k 2 is the weight of the influence of the area of ​​the deformation focus on the deformation coefficient, S is the surface area of ​​the inclined steel column structure, s a The first a The area of ​​the deformable unit, I It is the number of the deformation focus area on the inclined steel column structure;

[0023] S47: Calculate the deformation coefficients corresponding to all deformation focus areas on the inclined steel column structure , then calculate the deformation coefficient of the inclined steel column structure ;

[0024] ;

[0025] S48: Mark each deformation focus area on the three-dimensional model of the inclined steel column structure, and display the deformation coefficient corresponding to each deformation focus area.

[0026] Further, step S5 includes:

[0027] S51: When applying target loads to both ends of the inclined steel column structure, each evaluation segment is used as a vibration node and the displacement matrix of the vibration node is established. , c is the number of evaluation units at the vibration node, g c is the vibration node c The displacement of the evaluation unit, b is the number of the assessment section on the inclined steel column structure;

[0028] S52: Establishing the displacement interpolation function of the vibration node;

[0029] ;

[0030] in, is the shape function matrix of the evaluation unit, are the coordinates of the evaluation unit, is the displacement interpolation matrix of the evaluation unit;

[0031] S53: outputting the displacement interpolation of each evaluation unit on the evaluation segment according to the displacement interpolation function, and calculating the vibration coefficient of the evaluation segment;

[0032] ;

[0033] in, z b For the b The vibration coefficient of the evaluation section, For evaluation b Previous d Interpolation of displacements of evaluation units, d is the number of the assessment unit on the assessment segment;

[0034] S54: After calculating the vibration coefficient corresponding to each vibration node on the inclined steel column structure, select the maximum value of the vibration coefficient As the vibration coefficient of the inclined steel column structure.

[0035] Further, step S6 includes:

[0036] S61: Calculation of safety factor of inclined steel column structure using deformation coefficient and vibration coefficient F ;

[0037] ;

[0038] in, are the influence weights of deformation and vibration on the safety of inclined steel column structure, f 阈值 is the deformation coefficient threshold set, z 阈值 is the vibration coefficient threshold set;

[0039] S62: Safety factor F and the limit value of safety factor Make comparisons;

[0040] like , then the inclined steel column structure has potential safety hazards and the design parameters of the inclined steel column structure need to be modified;

[0041] like , then there is no safety hazard in the inclined steel column structure, and the current design parameters of the inclined steel column structure are reasonable.

[0042] The beneficial effects of the present invention are as follows: the present invention provides a steel column structure safety analysis method based on a finite element model, which can accurately simulate the stress state of the inclined steel column under the target working condition, and provide a scientific basis for engineering design and construction. By establishing a three-dimensional model and performing finite element analysis, the inclined steel column is split into several analysis units, the deformation performance and vibration performance of the inclined steel column are accurately calculated and analyzed, and the specific deformation coefficient and vibration coefficient are calculated, thereby evaluating the safety of the inclined steel column structure, and being able to timely discover potential safety hazards in the design of the inclined steel column structure, providing a strong guarantee for engineering safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of the safety analysis method for steel column structures based on finite element data model. DETAILED DESCRIPTION

[0044] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0045] like Figure 1 As shown, a safety analysis method for steel column structure based on finite element data model includes the following steps:

[0046] S1: Construct a three-dimensional model of the inclined steel column structure in the building structure, determine the support points at both ends of the inclined steel column structure and the sub-support points in the middle, and establish a three-dimensional coordinate system in the three-dimensional model. In the building structure, the inclined steel column generally uses the support points at both ends of the structure as the force points. In the process of bearing loads, the deformation and vibration that occur are key factors affecting the safety of the inclined steel column structure. When deformed, the surface of the steel column will produce wrinkles or bends, and the deformation characteristics can be reflected according to the surface deformation.

[0047] S2: Split the three-dimensional model surface of the inclined steel column structure into a number of uniform evaluation segments, and evenly split the surface of each evaluation segment into a number of evaluation units, and obtain the coordinates of the center of each evaluation unit in the three-dimensional coordinate system.

[0048] S3: Apply target loads to both ends of the inclined steel column structure, perform mechanical analysis on the evaluation segment and evaluation unit in the finite element analysis space, and obtain the deformation data corresponding to each evaluation unit and the vibration data on each evaluation segment.

[0049] S4: According to the deformation amount obtained by each deformation unit, the deformation focus area on the inclined steel column structure is evaluated, and the deformation amount on the deformation focus area is calculated, and the deformation coefficient is calculated according to the deformation amount of each deformation focus area on the inclined steel column structure. Step S4 specifically includes:

[0050] S41: Count the deformation corresponding to each evaluation unit , For the v The deformation corresponding to each evaluation unit is used to set the deformation threshold that affects the safety of the inclined steel column structure. , and select the deformation unit, the deformation amount corresponding to the deformation unit is the deformation amount that affects the safety of the inclined steel column structure; the deformation amount threshold The maximum deformation allowed by the evaluation unit exceeds the deformation threshold It shows that the evaluation unit has a large deformation, otherwise, no large deformation occurs.

[0051] like , then the evaluation unit is a deformation unit;

[0052] like , then the evaluation unit is not a deformation unit;

[0053] S42: Obtain abnormal deformation data set , For the e The deformation amount corresponding to the deformation unit is e is the number of deformation units;

[0054] S43: Screening out abnormal deformation data sets The maximum value in , the maximum value Corresponding deformation unit i As the center, calculate the deformation unit i The distance between the other deformation units , w is the number of the deformation unit, Deformation unit w The coordinates of the distance data set are obtained , Deformation unit i With deformation unit w The distance between Deformation unit i With deformation unit i -1 distance between;

[0055] S44: According to the distance value between two adjacent evaluation units , distance value It can be calculated based on the center coordinates of two adjacent evaluation units, from the distance data set D 1 Filter out the distance value Equal distance values, and the corresponding deformation unit is around the deformation unit i The surrounding deformation unit , deformation unit and deformation unit i Located in the same deformation focus area;

[0056] S45: Filter out all deformation units Then, return to step S43 and use the deformation unit Replace deformation unit i , and the deformation unit The corresponding deformation amount is obtained from the abnormal deformation data set , to form a new abnormal deformation data set, and then perform steps S43-S44 to filter out the deformation units. All surrounding deformation units ;

[0057] S46: After all deformation units in the same deformation focus area are obtained, the abnormal deformation data corresponding to all deformation units in the same deformation focus area are obtained. Calculate the deformation coefficient of the deformation focus area , , The first v The deformation amount corresponding to the deformation unit is v is the number of deformation units in the same deformation focus area;

[0058] ;

[0059] in, The first a The deformation amount corresponding to the deformation unit is a is the number of the deformation unit in the same deformation focus area, k 1 is the influence weight of deformation on deformation coefficient, which is generally taken as 0.6. k 2 is the weight of the area of ​​the deformation focus on the deformation coefficient, which is generally taken as 0.4. S is the surface area of ​​the inclined steel column structure, s a The first a The area of ​​the deformable unit, I It is the number of the deformation focus area on the inclined steel column structure;

[0060] The present invention calculates the deformation coefficient based on the area of ​​the deformation focus area and the average deformation amount in the deformation focus area, and introduces the exp function. The exp function is an increasing exponential function. The larger the deformation amount and the larger the area of ​​the deformation focus area, the larger the deformation coefficient, and the greater the safety risk of the inclined steel column structure.

[0061] S47: Calculate the deformation coefficients corresponding to all deformation focus areas on the inclined steel column structure , then calculate the deformation coefficient of the inclined steel column structure ;

[0062] ;

[0063] S48: Mark each deformation focus area on the three-dimensional model of the inclined steel column structure, and display the deformation coefficient corresponding to each deformation focus area.

[0064] S5: Calculate the vibration coefficient of the inclined steel column structure according to the vibration data on each evaluation section. Step S5 specifically includes:

[0065] S51: When applying target loads to both ends of the inclined steel column structure, each evaluation segment is used as a vibration node and the displacement matrix of the vibration node is established. , c is the number of evaluation units at the vibration node, g c is the vibration node c The displacement of the evaluation unit, b is the number of the assessment section on the inclined steel column structure;

[0066] S52: Establishing the displacement interpolation function of the vibration node;

[0067] ;

[0068] in, is the shape function matrix of the evaluation unit, are the coordinates of the evaluation unit, is the displacement interpolation matrix of the evaluation unit;

[0069] S53: outputting the displacement interpolation of each evaluation unit on the evaluation segment according to the displacement interpolation function, and calculating the vibration coefficient of the evaluation segment;

[0070] ;

[0071] in, z b For the b The vibration coefficient of the evaluation section, For evaluation b Previous d Interpolation of displacements of evaluation units, d is the number of the assessment unit on the assessment segment;

[0072] S54: After calculating the vibration coefficient corresponding to each vibration node on the inclined steel column structure, select the maximum value of the vibration coefficient As the vibration coefficient of the inclined steel column structure.

[0073] S6: Calculate the safety factor of the inclined steel column structure using the deformation coefficient and the vibration coefficient to evaluate the safety of the inclined steel column structure. Step S6 specifically includes:

[0074] S61: Calculation of safety factor of inclined steel column structure using deformation coefficient and vibration coefficient F ;

[0075] ;

[0076] in, They are the influence weights of deformation and vibration on the safety of inclined steel column structures, which are generally taken as , f 阈值 is the deformation coefficient threshold set, z 阈值 is the vibration coefficient threshold value set; similarly, when calculating the safety factor, the present invention introduces the exp function. The larger the deformation coefficient and the vibration coefficient, the greater the safety risk of the inclined steel column structure.

[0077] S62: Safety factor F and the limit value of safety factor Make comparisons;

[0078] like , then the inclined steel column structure has potential safety hazards and the design parameters of the inclined steel column structure need to be modified;

[0079] like , then there is no safety hazard in the inclined steel column structure, and the current design parameters of the inclined steel column structure are reasonable.

[0080] The present invention provides a steel column structure safety analysis method based on a finite element model, which can accurately simulate the stress state of the inclined steel column under the target working condition, and provide a scientific basis for engineering design and construction. By establishing a three-dimensional model and performing finite element analysis, the inclined steel column is split into several analysis units, and the deformation performance and vibration performance of the inclined steel column are accurately calculated and analyzed, and the specific deformation coefficient and vibration coefficient are calculated, thereby evaluating the safety of the inclined steel column structure, and being able to timely discover potential safety hazards in the design of the inclined steel column structure, providing a strong guarantee for engineering safety.

Claims

1. A safety analysis method for steel column structures based on finite element data model, It is characterized in that The following steps are involved: S1: Construct a three-dimensional model of the inclined steel column structure in the building structure, determine the support points at both ends of the inclined steel column structure and the sub-support points in the middle, and establish a three-dimensional coordinate system in the three-dimensional model; S2: split the three-dimensional model surface of the inclined steel column structure into a number of uniform evaluation segments, and evenly split the surface of each evaluation segment into a number of evaluation units, and obtain the coordinates of the center of each evaluation unit in the three-dimensional coordinate system; S3: Apply target loads to both ends of the inclined steel column structure, perform mechanical analysis on the evaluation segment and evaluation unit in the finite element analysis space, and obtain deformation data corresponding to each evaluation unit and vibration data on each evaluation segment; S4: according to the deformation amount obtained by each deformation unit, the deformation focus area on the inclined steel column structure is evaluated, and the deformation amount on the deformation focus area is calculated, and the deformation coefficient is calculated according to the deformation amount of each deformation focus area on the inclined steel column structure; S5: Calculate the vibration coefficient of the inclined steel column structure based on the vibration data on each evaluation section; S6: Calculate the safety factor of the inclined steel column structure using the deformation coefficient and vibration coefficient to evaluate the safety of the inclined steel column structure; The step S4 comprises: S41: Count the deformation corresponding to each evaluation unit , For the v The deformation corresponding to each evaluation unit is used to set the deformation threshold that affects the safety of the inclined steel column structure. , and select the deformation unit, the deformation amount corresponding to the deformation unit is the deformation amount that affects the safety of the inclined steel column structure; like , then the evaluation unit is a deformation unit; like , then the evaluation unit is not a deformation unit; S42: Obtain abnormal deformation data set , For the e The deformation amount corresponding to the deformation unit is e is the number of deformation units; S43: Screening out abnormal deformation data sets The maximum value in , the maximum value Corresponding deformation unit i As the center, calculate the deformation unit i The distance between the other deformation units , w is the number of the deformation unit, Deformation unit w The coordinates of the distance data set are obtained , Deformation unit i With deformation unit w The distance between Deformation unit i With deformation unit i -1 distance between; S44: According to the distance value between two adjacent evaluation units , from the distance data set D 1 Filter out the distance values Equal distance values, and the corresponding deformation unit is around the deformation unit i The surrounding deformation unit , deformation unit and deformation unit i Located in the same deformation focus area; S45: Filter out all deformation units Then, return to step S43 and use the deformation unit Replace deformation unit i , and the deformation unit The corresponding deformation amount is obtained from the abnormal deformation data set , to form a new abnormal deformation data set, and then perform steps S43-S44 to filter out the deformation units. All surrounding deformation units ; S46: After all deformation units in the same deformation focus area are obtained, the abnormal deformation data corresponding to all deformation units in the same deformation focus area are obtained. Calculate the deformation coefficient of the deformation focus area , , The first v The deformation amount corresponding to the deformation unit is v is the number of deformation units in the same deformation focus area; ； in, The first a The deformation amount corresponding to the deformation unit is a is the number of the deformation unit in the same deformation focus area, k 1 is the influence weight of deformation on deformation coefficient, k 2 is the influence weight of the area of ​​the deformation focus on the deformation coefficient, S is the surface area of ​​the inclined steel column structure, s a The first a The area of ​​the deformable unit, I It is the number of the deformation focus area on the inclined steel column structure; S47: Calculate the deformation coefficients corresponding to all deformation focus areas on the inclined steel column structure , then calculate the deformation coefficient of the inclined steel column structure ; ； S48: Mark each deformation focus area on the three-dimensional model of the inclined steel column structure, and display the deformation coefficient corresponding to each deformation focus area.

2. According to the steel column structure safety analysis method based on finite element data model according to claim 1, It is characterized in that The step S5 comprises: S51: When applying target loads to both ends of the inclined steel column structure, each evaluation segment is used as a vibration node and the displacement matrix of the vibration node is established. , c is the number of evaluation units at the vibration node, g c is the vibration node c The displacement of the evaluation unit, b is the number of the assessment section on the inclined steel column structure; S52: Establishing the displacement interpolation function of the vibration node; ； in, is the shape function matrix of the evaluation unit, are the coordinates of the evaluation unit, is the displacement interpolation matrix of the evaluation unit; S53: outputting the displacement interpolation of each evaluation unit on the evaluation segment according to the displacement interpolation function, and calculating the vibration coefficient of the evaluation segment; ； in, z b For the b The vibration coefficient of the evaluation section, For evaluation b Previous d Interpolation of displacements of evaluation units, d is the number of the assessment unit on the assessment segment; S54: After calculating the vibration coefficient corresponding to each vibration node on the inclined steel column structure, select the maximum value of the vibration coefficient As the vibration coefficient of the inclined steel column structure.

3. According to the steel column structure safety analysis method based on finite element data model according to claim 2, It is characterized in that The step S6 comprises: S61: Calculation of safety factor of inclined steel column structure using deformation coefficient and vibration coefficient F ; ； in, are the influence weights of deformation and vibration on the safety of inclined steel column structure, f 阈值 is the deformation coefficient threshold set, z 阈值 is the vibration coefficient threshold set; S62: Safety factor F and the limit value of safety factor Make comparisons; like , then the inclined steel column structure has potential safety hazards and the design parameters of the inclined steel column structure need to be modified; like , then there is no safety hazard in the inclined steel column structure, and the current design parameters of the inclined steel column structure are reasonable.