Device and method for detecting stability of large-span roof

Abstract

The invention discloses a stability detection device and method for a large-span roof, and the method comprises the steps: building a finite element analysis model according to the design size parameters of the large-span roof, and screening a target detection structure part according to an actual load; areas where a deformation sensor, a vibration sensor and a displacement sensor of the stability detection device are installed are screened on the target detection structure component; actual deformation data, vibration data and displacement data of the target detection structural component on the large-span roof in the using process are collected, the stability coefficient of the target detection structural component in the data collection period T is calculated, and then the stability of the large-span roof is evaluated. The detection device comprises a data acquisition module which comprises a deformation sensor, a vibration sensor and a displacement sensor; a data sending module; and a data processing center. The system can overcome the defects of a traditional detection means, achieves the high-precision, real-time and comprehensive monitoring of the stability of the large-span roof, and effectively guarantees the safety of a building structure.

Description

Technical Field

[0001] The invention relates to the field of building structure stability detection, and in particular to a stability detection device and a detection method for a large-span roof. Background Art

[0002] With the development of the current construction field, large-span roof structures are widely used in large stadiums, exhibition halls, airport terminals and other iconic buildings. These large-span roofs usually have complex spatial structures and are subjected to complex stresses and deformations caused by multiple factors such as self-weight, wind load, snow load, personnel activity load and temperature changes. With the increase of service life, the deterioration of structural material performance and accidental impact may endanger the stability of the roof. Once instability and collapse occur, it will cause immeasurable casualties and property losses.

[0003] Traditional building structure inspection methods, such as manual regular inspections and local sampling inspections, are difficult to achieve comprehensive, real-time, and accurate stability assessments for complex and large-area structures such as long-span roofs. In addition, manual regular inspections and local sampling inspections often fail to conduct reasonable stability assessments on some key and vulnerable structural components, and thus fail to accurately and comprehensively test the stability of long-span roof structures. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a stability detection device and method for a large-span roof, which detects the stability of key structural components based on accurate mechanical analysis, and then comprehensively evaluates the stability of the large-span roof.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is: A method for detecting the stability of a large-span roof is provided, which comprises the following steps: S1: Construct a finite element analysis model based on the design size parameters of the long-span roof, apply the actual load during installation and use to each structural component on the finite element analysis model, and select the structural components that need to be tested for stability based on the actual load as the target test structural components; S2: Divide the target detection structure component into a number of sub-evaluation units, apply an equivalent wind load to the target detection structure component, calculate the equivalent wind load response of each sub-evaluation unit, and select an area on the target detection structure component where a deformation sensor, a vibration sensor, and a displacement sensor of a stability detection device are installed; S3: After the stability detection device is installed on the target detection structure component of the large-span roof, the actual deformation data, vibration data and displacement data of the target detection structure component on the large-span roof are collected during use, and the data collection cycle is calculated. TThe internal target detects the stability coefficient of the structural components and then evaluates the stability of the large-span roof.

[0006] Further, step S1 includes: S11: In the process of applying actual loads, the importance coefficient of the structural component is calculated based on the type of stress the structural component is subjected to, the discreteness of different stress directions, and the stress magnitude. ; ; in, is the number of stress types experienced, is the average number of stress types borne by all structural components, i is the stress number to which the structural component is subjected, b i The structural parts are subjected to i The angular displacement of a stress relative to the stress reference plane, is the average value of the angular offset of the stresses on all structural components relative to the stress reference plane, c i The structural parts are subjected to i stress value, is the average value of the stress on all structural components, is the weight of the complexity of stress types on the importance of structural components, The weight of the stress dispersion degree of the structural component on the importance of the structural component, The weight of the stress value of the structural component on the importance of the structural component, and it satisfies , is the position coordinate of the structural component; S12: Set the importance coefficient threshold for evaluating whether structural components need to be inspected for stability ; like , it is determined that the structural component is subjected to complex stress during the use of the long-span roof and needs to be tested for stability, and is used as a structural component to be tested; like , it is determined that the structural component is simple to bear stress during the use of the long-span roof and does not need to be tested for stability; S13: After obtaining all the structural parts to be inspected, extract the position coordinates of each structural part to be inspected and construct a set of structural parts to be inspected And the set of structural parts to be tested The position coordinates of the internal structure to be inspected , and calculate the dispersion coefficient of the distribution of the structure to be inspected according to the position coordinates; ; in, s、v They are two different structural parts to be tested. For the structural parts to be tested s The position coordinates of the adjacent structural parts to be inspected, L s For the structural parts to be tested s The coefficient of dispersion of the distribution, For the structural parts to be tested s The location coordinates of For the structural parts to be tested v The location coordinates of V is the number of structural parts to be inspected, l To determine the difference between the structural parts to be inspected and the structural parts to be inspected s The distance threshold for whether the locations are adjacent, u For the structural parts to be tested s The numbers of the adjacent structural parts to be inspected. U For the structural parts to be tested s The number of adjacent structural parts to be inspected, For the structural parts to be tested s A set of position coordinates of adjacent structural parts to be inspected; S14: Setting the discrete coefficient threshold for determining whether the structure to be inspected is densely distributed ; like , then determine the structural part to be tested s The surrounding structures to be inspected are densely distributed. s From the set of structural parts to be inspected Internal deletion; like , then determine the structural part to be tested s The surrounding structures to be inspected are reasonably distributed and the structures to be inspected are retained. s ; S15: Assemble the structural parts to be inspected The structural parts to be inspected retained in the system serve as target inspection structural parts that require stability inspection.

[0007] Further, step S2 includes: S21: Divide the target detection structure into several sub-assessment units, and apply equivalent wind loads to the target detection structure. The equivalent wind loads are pulse loads. Calculate the equivalent wind load response of each sub-assessment unit. ; ; in, e is the position of the sub-evaluation unit on the structure to be tested, is the peak factor of the equivalent wind load, For sub-assessment units e Equivalent wind load and sub-assessment unit e 1 Correlation coefficient between the equivalent wind loads received, For sub-assessment units e The standard deviation of the pulse load, r is the equivalent wind load response, I r is the equivalent wind load response r The influence line of t is the moment of pulse load, For sub-assessment units e At the moment t The equivalent wind load response is: L is the length of the structural part to be tested, For sub-assessment units e 1 at the moment t The equivalent wind load response is: is the standard deviation of the equivalent wind load response; S22: Obtain the equivalent wind load response data of each sub-assessment unit on the target detection structural component , w is the number of sub-evaluation units on the target detection structure component, For sub-assessment units e w Equivalent wind load response, and filter out equivalent wind load response data The maximum value in , and extract the maximum value The position of the corresponding sub-evaluation unit on the target detection structure component e max , which serves as an area for installing deformation sensors, vibration sensors and displacement sensors of the stability detection device.

[0008] Further, step S3 includes: S31: After the stability detection device is installed on the target detection structure component of the large-span roof, the actual deformation data, vibration data and displacement data of the target detection structure component on the large-span roof are collected during use; each data collection cycle is established T Deformation dataset of structural components for target detection collected in , vibration dataset and displacement datasets , , and The data collection cycle T Neidi q The deformation data, vibration data and displacement data collectedq The collection cycle T The number of times data is collected; S32: Calculate data collection cycle T Stability coefficient of internal target detection structural components ; ; in, j The collection cycle T The number of times the data is collected. and The data collection cycle T Neidi j The deformation data and displacement data collected For deformation dataset The average value of the internal deformation data, For the vibration data set The average value of the internal vibration data, For the vibration data set The maximum value of the internal vibration data, is the permissible threshold of displacement data, Data collection cycle T -1 is the sum of the calculated displacement data, are the weight coefficients of deformation, vibration and displacement on the stability of target detection structural components, and ; S33: Detect the stability coefficient of structural components during use based on all targets on the long-span roof , is the number of target detection structural components, Detecting structural components for objects R In the collection cycle T The stability coefficient of the current data collection cycle is calculated T Stability coefficient of internal large-span roof ; S34: Setting thresholds for assessing the stability of long-span roofs ,like , then it is determined that the stability of the large-span roof is poor within the current acquisition period T. , then determine the current collection cycle T The internal large-span roof has better stability.

[0009] Provided is a stability detection device for a large-span roof, which performs the above-mentioned stability detection method for a large-span roof, and comprises: The data acquisition module includes a deformation sensor, a vibration sensor and a displacement sensor, which are installed on the target detection structural component of the large-span roof to collect deformation, vibration and displacement data of the target detection structural component; A data sending module is used to send the collected deformation, vibration and displacement data to a data processing center; The data processing center analyzes deformation, vibration and displacement data to evaluate the stability of large-span roofs.

[0010] The beneficial effects of the present invention are as follows: the present invention performs finite element mechanical analysis based on the design parameters of the long-span roof, and selects important structural components that affect the stability of the long-span roof structure according to the complexity of the forces on each structural component, thereby serving as the basis for the stability detection of the long-span roof. At the same time, the installation position of the stability detection sensor is determined according to the force analysis of the structural component to ensure that the data collected by the sensor can accurately reflect the stability state of the structural component and improve the accuracy of the stability analysis of the long-span roof. The present invention can overcome the shortcomings of traditional detection methods, realize high-precision, real-time, and comprehensive monitoring of the stability of the long-span roof, and effectively ensure the safety of the building structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Flow chart of the stability detection method for large-span roof. DETAILED DESCRIPTION

[0012] 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.

[0013] like Figure 1 As shown, a stability detection method for a large-span roof comprises the following steps: S1: Construct a finite element analysis model based on the design size parameters of the large-span roof, apply the actual load during installation and use to each structural component on the finite element analysis model, and select the structural components that need to be tested for stability based on the actual load as the target test structural components. Specifically include: S11: In the process of applying actual loads, the importance coefficient of the structural component is calculated based on the type of stress the structural component is subjected to, the discreteness of different stress directions, and the stress magnitude. ; ; in, is the number of stress types experienced, is the average number of stress types borne by all structural components, i is the stress number to which the structural component is subjected, bi The structural parts are subjected to i The angular displacement of a stress relative to the stress reference plane, is the average value of the angular offset of the stresses on all structural components relative to the stress reference plane, c i The structural parts are subjected to i stress value, is the average value of the stress on all structural components, is the weight of the complexity of stress types on the importance of structural components, The weight of the stress dispersion degree of the structural component on the importance of the structural component, The weight of the stress value of the structural component on the importance of the structural component, and it satisfies , generally take , is the position coordinate of the structural component.

[0014] This embodiment performs finite element analysis on the long-span roof structure to obtain the stress file of each structural component, and evaluates the importance of the structural component to the long-span roof structure according to the complexity, dispersion and value of the stress. The more types of stress, the more dispersed, and the larger the value, the more important the structural component is to the long-span roof in terms of bearing function and connection function, and the more important it is to the stability of the long-span roof during use, and stability testing is required.

[0015] S12: Set the importance coefficient threshold for evaluating whether structural components need to be inspected for stability ; like , it is determined that the structural component is subjected to complex stress during the use of the long-span roof and needs to be tested for stability, and is used as a structural component to be tested; like , it is determined that the structural component is simple to bear stress during the use of the long-span roof and does not need to be tested for stability; S13: After obtaining all the structural parts to be inspected, extract the position coordinates of each structural part to be inspected and construct a set of structural parts to be inspected And the set of structural parts to be tested The position coordinates of the internal structure to be inspected , and calculate the dispersion coefficient of the distribution of the structure to be inspected according to the position coordinates; ; in, s、v They are two different structural parts to be tested. For the structural parts to be testeds The position coordinates of the adjacent structural parts to be inspected, L s For the structural parts to be tested s The coefficient of dispersion of the distribution, For the structural parts to be tested s The location coordinates of For the structural parts to be tested v The location coordinates of V is the number of structural parts to be inspected, l To determine the difference between the structural parts to be inspected and the structural parts to be inspected s The distance threshold for whether the locations are adjacent, u For the structural parts to be tested s The numbers of the adjacent structural parts to be inspected. U For the structural parts to be tested s The number of adjacent structural parts to be inspected, For the structural parts to be tested s A set of position coordinates of adjacent structural parts to be inspected.

[0016] The size of the discrete coefficient of the distribution of the structural parts to be inspected represents the density of the structural parts to be inspected distributed around. For the stability of the structural parts to be inspected that are close to each other, it is only necessary to detect the stability of one of the structural parts to be inspected, which can reduce the cost of stability detection and the complexity of data processing.

[0017] S14: Setting the discrete coefficient threshold for determining whether the structure to be inspected is densely distributed ; like , then determine the structural part to be tested s The surrounding structures to be inspected are densely distributed. s From the set of structural parts to be inspected Internal deletion; like , then determine the structural part to be tested s The surrounding structures to be inspected are reasonably distributed and the structures to be inspected are retained. s ; S15: Assemble the structural parts to be inspected The structural parts to be inspected retained in the system serve as target inspection structural parts that require stability inspection.

[0018] S2: Divide the target detection structure component into several sub-evaluation units, apply equivalent wind load to the target detection structure component, calculate the equivalent wind load response of each sub-evaluation unit, and select the area on the target detection structure component where the deformation sensor, vibration sensor and displacement sensor of the stability detection device are installed. Specifically include: S21: Divide the target detection structure into several sub-assessment units, and apply equivalent wind loads to the target detection structure. The equivalent wind loads are pulse loads. Calculate the equivalent wind load response of each sub-assessment unit. ; ; in, e is the position of the sub-evaluation unit on the target detection structure component, is the peak factor of the equivalent wind load, For sub-assessment units e Equivalent wind load and sub-assessment unit e 1 Correlation coefficient between the equivalent wind loads received, For sub-assessment units e The standard deviation of the pulse load, r is the equivalent wind load response, I r is the equivalent wind load response r The influence line of t is the moment of pulse load, For sub-assessment units e At the moment t The equivalent wind load response is: L is the length of the target detection structural component, For sub-assessment units e 1 at the moment t The equivalent wind load response is: is the standard deviation of the equivalent wind load response; S22: Obtain the equivalent wind load response data of each sub-assessment unit on the target detection structural component , w is the number of sub-evaluation units on the target detection structure component, For sub-assessment units e w Equivalent wind load response, and filter out equivalent wind load response data The maximum value in , and extract the maximum value The position of the corresponding sub-evaluation unit on the target detection structure component e max , which serves as an area for installing deformation sensors, vibration sensors and displacement sensors of the stability detection device.

[0019] S3: After the stability detection device is installed on the target detection structure component of the large-span roof, the actual deformation data, vibration data and displacement data of the target detection structure component on the large-span roof are collected during use, and the data collection cycle is calculated. TThe internal target detects the stability coefficient of the structural components and then evaluates the stability of the large-span roof. Specifically, it includes: S31: After the stability detection device is installed on the target detection structure component of the large-span roof, the actual deformation data, vibration data and displacement data of the target detection structure component on the large-span roof are collected during use; each data collection cycle is established T Deformation dataset of structural components for target detection collected in , vibration dataset and displacement datasets , , and The data collection cycle T Neidi q The deformation data, vibration data and displacement data collected q The collection cycle T The number of times data is collected; S32: Calculate data collection cycle T Stability coefficient of internal target detection structural components ; ; in, j The collection cycle T The number of times the data is collected. and The data collection cycle T Neidi j The deformation data and displacement data collected For deformation dataset The average value of the internal deformation data, For the vibration data set The average value of the internal vibration data, For the vibration data set The maximum value of the internal vibration data, is the permissible threshold of displacement data, Data collection cycle T -1 is the sum of the calculated displacement data, are the weight coefficients of deformation, vibration and displacement on the stability of target detection structural components, and , generally take ; S33: Detect the stability coefficient of structural components during use based on all targets on the long-span roof , is the number of target detection structural components, Detecting structural components for objects R In the collection cycle TThe stability coefficient of the current data collection cycle is calculated T Stability coefficient of internal large-span roof ; S34: Setting thresholds for assessing the stability of long-span roofs ,like , then determine the current collection cycle T The stability of the large-span roof is poor. , then determine the current collection cycle T The internal large-span roof has better stability.

[0020] The present invention performs finite element mechanical analysis based on the design parameters of the long-span roof, and selects important structural components that affect the stability of the long-span roof structure according to the complexity of the forces on each structural component, which then serves as the basis for the stability detection of the long-span roof. At the same time, the installation position of the stability detection sensor is determined according to the force analysis of the structural component to ensure that the data collected by the sensor can accurately reflect the stability state of the structural component and improve the accuracy of the stability analysis of the long-span roof. The present invention can overcome the shortcomings of traditional detection methods, realize high-precision, real-time, and comprehensive monitoring of the stability of the long-span roof, and effectively ensure the safety of the building structure.

Claims

1. A method for detecting the stability of a large-span roof, characterized in that: The following steps are involved: S1: Construct a finite element analysis model based on the design size parameters of the long-span roof, apply the actual load during installation and use to each structural component on the finite element analysis model, and select the structural components that need to be tested for stability based on the actual load as the target test structural components; S2: Divide the target detection structure component into a number of sub-evaluation units, apply an equivalent wind load to the target detection structure component, calculate the equivalent wind load response of each sub-evaluation unit, and select an area on the target detection structure component where a deformation sensor, a vibration sensor, and a displacement sensor of a stability detection device are installed; S3: After the stability detection device is installed on the target detection structure component of the large-span roof, the actual deformation data, vibration data and displacement data of the target detection structure component on the large-span roof are collected during use, and the data collection cycle is calculated. T The internal target detects the stability coefficient of the structural components and then evaluates the stability of the large-span roof.

2. The stability detection method of a large-span roof according to claim 1 is characterized in that: The step S1 comprises: S11: In the process of applying actual loads, the importance coefficient of the structural component is calculated based on the type of stress the structural component is subjected to, the discreteness of different stress directions, and the stress magnitude. ; ； in, is the number of stress types experienced, is the average number of stress types borne by all structural components, i is the stress number to which the structural component is subjected, b i The structural parts are subjected to i The angular displacement of a stress relative to the stress reference plane, is the average value of the angular offset of the stresses on all structural components relative to the stress reference plane, c i The structural parts are subjected to i stress value, is the average value of the stress on all structural components, is the weight of the complexity of stress types on the importance of structural components, The weight of the stress dispersion degree of the structural component on the importance of the structural component, The weight of the stress value of the structural component on the importance of the structural component, and it satisfies , is the position coordinate of the structural component; S12: Set the importance coefficient threshold for evaluating whether structural components need to be inspected for stability ; like , it is determined that the structural component is subjected to complex stress during the use of the long-span roof and needs to be tested for stability, and is used as a structural component to be tested; like , it is determined that the structural component is simple to bear stress during the use of the long-span roof and does not need to be tested for stability; S13: After obtaining all the structural parts to be inspected, extract the position coordinates of each structural part to be inspected and construct a set of structural parts to be inspected And the set of structural parts to be tested The position coordinates of the internal structure to be inspected , and calculate the dispersion coefficient of the distribution of the structure to be inspected according to the position coordinates; ； in, s、v They are two different structural parts to be tested. For the structural parts to be tested s The position coordinates of the adjacent structural parts to be inspected, L s For the structural parts to be tested s The coefficient of dispersion of the distribution, For the structural parts to be tested s The location coordinates of For the structural parts to be tested v The location coordinates of V is the number of structural parts to be inspected, l To determine the difference between the structural parts to be inspected and the structural parts to be inspected s The distance threshold for whether the locations are adjacent, u For the structural parts to be tested s The numbers of the adjacent structural parts to be inspected. U For the structural parts to be tested s The number of adjacent structural parts to be inspected, For the structural parts to be tested s A set of position coordinates of adjacent structural parts to be inspected; S14: Setting the discrete coefficient threshold for determining whether the structure to be inspected is densely distributed ; like , then determine the structural part to be tested s The surrounding structures to be inspected are densely distributed. s From the set of structural parts to be inspected Internal deletion; like , then determine the structural part to be tested s The surrounding structures to be inspected are reasonably distributed and the structures to be inspected are retained. s ; S15: Assemble the structural parts to be inspected The structural parts to be inspected retained in the system serve as target inspection structural parts that require stability inspection.

3. The stability detection method of a large-span roof according to claim 2 is characterized in that: The step S2 comprises: S21: Divide the target detection structure into several sub-assessment units, and apply equivalent wind loads to the target detection structure. The equivalent wind loads are pulse loads. Calculate the equivalent wind load response of each sub-assessment unit. ; ； in, e is the position of the sub-evaluation unit on the target detection structure component, is the peak factor of the equivalent wind load, For sub-assessment units e Equivalent wind load and sub-assessment unit e 1 Correlation coefficient between the equivalent wind loads received, For sub-assessment units e The standard deviation of the pulse load, r is the equivalent wind load response, I r is the equivalent wind load response r The influence line of t is the moment of pulse load, For sub-assessment units e At the moment t The equivalent wind load response is: L is the length of the target detection structural component, For sub-assessment units e 1 at the moment t The equivalent wind load response is: is the standard deviation of the equivalent wind load response; S22: Obtain the equivalent wind load response data of each sub-assessment unit on the target detection structural component , w is the number of sub-evaluation units on the target detection structure component, For sub-assessment units e w Equivalent wind load response, and filter out equivalent wind load response data The maximum value in , and extract the maximum value The position of the corresponding sub-evaluation unit on the target detection structure component e max , which serves as an area for installing deformation sensors, vibration sensors and displacement sensors of the stability detection device.

4. The stability detection method of a large-span roof according to claim 3 is characterized in that: The step S3 comprises: S31: After the stability detection device is installed on the target detection structure component of the large-span roof, the actual deformation data, vibration data and displacement data of the target detection structure component on the large-span roof are collected during use; each data collection cycle is established T Deformation dataset of structural components for target detection collected in , vibration dataset and displacement datasets , , and The data collection cycle T Neidi q The deformation data, vibration data and displacement data collected q The collection cycle T The number of times data is collected; S32: Calculate data collection cycle T Stability coefficient of internal target detection structural components ; ； in, j The collection cycle T The number of times the data is collected. and The data collection cycle T Neidi j The deformation data and displacement data collected For deformation dataset The average value of the internal deformation data, For the vibration data set The average value of the internal vibration data, For the vibration data set The maximum value of the internal vibration data, is the permissible threshold of displacement data, Data collection cycle T -1 is the sum of the calculated displacement data, are the weight coefficients of deformation, vibration and displacement on the stability of target detection structural components, and ; S33: Detect the stability coefficient of structural components during use based on all targets on the long-span roof , is the number of target detection structural components, Detecting structural components for objects R In the collection cycle T The stability coefficient of the current data collection cycle is calculated T Stability coefficient of internal large-span roof ; S34: Setting thresholds for assessing the stability of long-span roofs ,like , then it is determined that the stability of the large-span roof is poor within the current acquisition period T. , then determine the current collection cycle T The internal large-span roof has better stability.

5. A stability detection device for a large-span roof, which implements the stability detection method for a large-span roof according to any one of claims 1 to 4, characterized in that: include: The data acquisition module includes a deformation sensor, a vibration sensor and a displacement sensor, which are installed on the target detection structural component of the large-span roof to collect deformation, vibration and displacement data of the target detection structural component; A data sending module is used to send the collected deformation, vibration and displacement data to a data processing center; The data processing center analyzes deformation, vibration and displacement data to evaluate the stability of large-span roofs.

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