CN112651650B - Real-time evaluation method for internal force of building operation and maintenance period structure based on AR technology - Google Patents
Real-time evaluation method for internal force of building operation and maintenance period structure based on AR technology Download PDFInfo
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Abstract
The invention discloses a real-time evaluation method for internal force of a building operation and maintenance period structure based on an AR technology, and relates to the technical field of building construction. The method aims at solving the problem that the accurate internal force state in the building structure cannot be known by the existing method for analyzing the internal force state in the operation and maintenance period of the building structure based on VR and BIM technologies. The evaluation method comprises the following steps: the method comprises the steps of obtaining variable object information in a building structure by using an augmented reality technology, integrating load working conditions into an augmented reality scene based on the corresponding relation between the variable object and the load working conditions, establishing a load combination according to the load working conditions in the real scene, comparing the load combination with a design load combination to obtain an actual internal force safety coefficient of a critical component in the real scene, and evaluating the internal force state of the building structure in real time through the ratio of the actual internal force safety coefficient to the design internal force safety coefficient.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a real-time evaluation method for internal force of a building operation and maintenance period structure based on an AR technology.
Background
During the operation and maintenance period of building structures, especially large public venues (such as gymnasiums and exhibitions) and road bridge tunnels, random changes of internal and external loads exist, and the changes are directly related to the internal force of the building structures. The internal force of the building structure is related to the overall safety of the building, and is a key component of the operation and maintenance of the building structure.
Usually, the operation and maintenance of the building structure are ensured by designing a given safety margin in advance, but on one hand, as the service time of the building structure increases, the performance of the building structure is continuously degraded, and the safety margin is continuously reduced; on the other hand, the building structure may also have an extreme load condition which cannot be fully considered in the design stage, so that the safety margin cannot meet the safety requirement under the extreme load with a high probability, and therefore, the internal force state evaluation of the building structure should be monitored and evaluated periodically or continuously during the operation and maintenance of the building structure, and the key of the monitoring and evaluation is to obtain the variable characteristics of the building structure, which are mainly characterized by the position, quantity and weight change of people and/or objects in the actual building structure, environmental load (such as temperature and humidity) and wind load change and the like.
Currently, there is a joint application based on Virtual Reality (VR) technology and BIM technology to solve the above-mentioned problems, specifically, a three-dimensional model of a building structure is built, the above-mentioned variable features are introduced into the three-dimensional model of the building structure to analyze and evaluate internal force, however, the three-dimensional model generated by adopting the above-mentioned method is a static model, and cannot quickly respond to dynamic changes of the internal force of the building structure, and cannot learn the accurate internal force state in the building structure.
Disclosure of Invention
The method aims at solving the problem that the accurate internal force state in the building structure cannot be known by the existing method for analyzing the internal force state in the operation and maintenance period of the building structure based on VR and BIM technologies. The invention aims to provide a real-time evaluation method for internal force of a building operation and maintenance period structure based on an AR technology.
The technical scheme adopted for solving the technical problems is as follows: the real-time evaluation method for the internal force of the building operation and maintenance period structure based on the AR technology comprises the following steps:
s1: dividing a building structure into blocks, and giving out the designed load working condition and load combination corresponding to each block and the designed internal force safety coefficient of the key components in the building structure under the set load combination;
s2: establishing a corresponding relation between a variable object in a building structure and a load working condition;
s3: tracking registration and scene scanning are carried out on each block based on an augmented reality technology, information of variable objects added and variable objects reduced in each block is given currently, and the variable objects and the load working conditions are converted based on the corresponding relation between the variable objects and the load working conditions to form the load working conditions under a real scene;
s4: building a load combination according to the load working condition in the real scene, comparing the load combination with the designed load combination to obtain the actual internal force safety coefficient of the key component in the real scene, and evaluating the internal force state of the building structure in real time as follows:
when the actual internal force safety coefficient of the critical component is larger than the design internal force safety coefficient of the critical component in a real scene, the building structure is in a safe state;
when the actual internal force safety coefficient of the critical component is smaller than the design internal force safety coefficient of the critical component but larger than 1 in a real scene, the building structure is still in a safe state, but the safety margin is reduced;
when the actual internal force safety coefficient of the critical component is smaller than 1 in a real scene, the building structure is in a dangerous state.
According to the real-time evaluation method for the internal force of the building operation and maintenance period structure based on the AR technology, the variable object information in the building structure is obtained by using the augmented reality technology, the load working condition is integrated into an augmented reality scene based on the corresponding relation between the variable object and the load working condition, a load combination is established according to the load working condition in the real scene, the load combination is compared with a design load combination to obtain the actual internal force safety coefficient of a key component in the real scene, and the internal force state of the building structure is evaluated in real time according to the ratio of the actual internal force safety coefficient to the design internal force safety coefficient, so that the real-time evaluation method has the following beneficial effects:
1. the augmented reality technology can provide a better solution compared with the virtual reality technology, the virtual reality technology provides a full three-dimensional static model of a building structure, dynamic differences between the full three-dimensional static model and an actual building structure occur in an operation and maintenance period, the dynamic differences are difficult to be configured in a virtual reality scene, the augmented reality technology provides a virtualized three-dimensional model of a building structure variable object and is matched with the actual scene of the building structure, the dynamic differences can be configured quickly through a fusion simulation technology of the augmented reality, so that three-dimensional space characteristics in the augmented reality scene are consistent with actual building characteristics, and therefore, compared with a static model generated by the virtual reality technology, the augmented reality technology adopts a dynamic incremental model, a basic scene of the dynamic incremental model is always a real scene, and therefore dynamic changes of the building structure can be responded more quickly;
2. the incremental model virtual technology under the augmented reality technology is matched with dynamic change characteristics in the operation and maintenance period of the building structure, and the augmented reality scene is combined with the internal force state evaluation of the building structure, so that the augmented reality technology is truly applied to the performance evaluation of the operation and maintenance period of the building structure, the applicability and the efficiency of the internal force safety evaluation of the building structure are improved, and the application breadth and the depth of the augmented reality technology in the building field are improved;
3. based on load working conditions and load combinations, a rapid calculation method of actual internal force safety coefficients of key components in an augmented reality scene is provided, real-time evaluation of the internal force state of the building structure is obtained through comparison with the designed internal force safety coefficients, and efficiency and reliability of the internal force state evaluation are improved.
Further, in the step S2, the correspondence between the variable object and the load condition is as follows:
newly increasing/reducing object load, corresponding to the working condition of secondary constant load, in the form of concentrated force load and uniform load;
newly increasing/reducing personnel load, and corresponding to crowd load working conditions, wherein the form is uniform load;
newly increasing/reducing the load of moving tools such as vehicles and the like, and corresponding to other live load working conditions, wherein the form is a concentrated force load;
newly increasing/reducing wind load, wherein the wind load corresponds to the wind load working condition and is in the form of uniform load;
the temperature and the humidity are newly increased/reduced, and the form is a body load corresponding to the temperature and humidity load working condition.
Further, in the step S4, the method for calculating the actual internal force safety coefficient of the critical component in the real scene is as follows: actual internal force safety coefficient of critical component in real scene = design internal force safety coefficient of critical component x Σ (structural internal force x working condition combination coefficient corresponding to designed load working condition)/Σ (structural internal force x working condition combination coefficient corresponding to load working condition in real scene).
Further, the step S4 further includes directly displaying the actual internal force safety coefficient of the critical component in the actual scene on the augmented reality scene according to the requirement.
Still further, the step S4 further includes: and pre-simulating the load working condition by an augmented reality technology, and pre-knowing the actual internal force safety coefficient of the critical component in a preset scene.
Still further, the step S1 further includes correcting the design internal force safety coefficient of the critical component, and the steps are as follows: continuously monitoring the structural internal force of the critical component according to actual load conditions under a plurality of different load conditions in a period of time, and acquiring actual internal force data of the critical component;
synchronously acquiring the structural internal force of the key component corresponding to the load working conditions under the various different load conditions based on an augmented reality technology, and calculating theoretical internal force data of the key component under the load combination;
if the actual internal force under various load conditions is larger than the theoretical internal force, judging that the performance of the critical component is reduced, and recalculating the design internal force safety coefficient of the critical component by adopting the actual internal force.
Furthermore, the method for calculating the design internal force safety coefficient of the corrected critical component is as follows: design internal force safety coefficient of critical component after correction = design internal force safety coefficient of critical component before correction x (theoretical internal force/actual internal force).
Furthermore, the design internal force safety coefficients of the critical components before and after correction are directly displayed on the augmented reality scene according to the requirement.
Drawings
FIG. 1 is a flow chart of an embodiment of a method for real-time assessment and correction of forces in a building operation and maintenance period structure based on AR technology according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
Example 1
The real-time evaluation method for the internal force of the building operation and maintenance period structure based on the AR technology is described by referring to FIG. 1, and comprises the following specific steps:
s1: dividing the building structure into blocks, wherein the blocks have internal force evaluation significance, such as dividing large public venues according to layers or rooms, dividing road bridges and tunnels according to kilometers, and the like; aiming at each block, based on building structure design data, giving out the load working conditions (such as concentrated force, uniform load, body load and the like) of the design corresponding to the block, load combination and design internal force safety coefficients of key components under the set load combination, wherein the key components refer to components with larger internal force values or larger internal force change values;
s2: establishing a corresponding relation between a variable object in a building structure and a load working condition;
s3: tracking registration and scene scanning are carried out on each block based on an augmented reality technology, information of variable objects added and variable objects reduced in each current block is given, and the variable objects and the load working conditions are converted based on the corresponding relation between the variable objects and the load working conditions, so that the load working conditions under a real scene are rapidly formed;
s4: according to the load working condition in the real scene, a load combination is established, and is compared with the designed load combination, so that the actual internal force safety coefficient of the key component in the real scene is obtained, and the internal force state of the building structure is evaluated in real time as follows:
when the actual internal force safety coefficient of the critical component is larger than the design internal force safety coefficient of the critical component in the real scene, the building structure is in a safe state;
when the actual internal force safety coefficient of the critical component is smaller than the design internal force safety coefficient of the critical component but larger than 1 in a real scene, the building structure is still in a safe state, but the safety margin is reduced;
when the actual internal force safety coefficient of the critical components in the real scene is smaller than 1, the building structure is in a dangerous state.
Simplified expression, i.e
The actual internal force safety coefficient is greater than or equal to the design internal force safety coefficient safety
Actual internal force safety coefficient of 1-1 < design internal force safety coefficient safety but safety margin reduction
Actual internal force safety coefficient <1 risk
According to the real-time evaluation method for the internal force of the building operation and maintenance period structure based on the AR technology, the variable object information in the building structure is obtained by using the augmented reality technology, the load working condition is integrated into an augmented reality scene based on the corresponding relation between the variable object and the load working condition, a load combination is established according to the load working condition in the real scene, the load combination is compared with a design load combination to obtain the actual internal force safety coefficient of a key component in the real scene, and the internal force state of the building structure is evaluated in real time according to the ratio of the actual internal force safety coefficient to the design internal force safety coefficient, so that the real-time evaluation method has the following beneficial effects:
1. augmented reality (Augmented Reality, abbreviated as AR) can effectively integrate virtual objects into an actual scene, so as to provide a simulation algorithm in advance for virtual object arrangement in the actual scene, and has higher use value in coping with virtual construction and virtual maintenance requirements of the building industry, but the augmented reality technology can provide a better solution compared with the virtual reality technology, and has the distinguishing advantages that: the virtual reality technology provides a full three-dimensional static model of a building structure, dynamic differences between the full three-dimensional static model and an actual building structure occur in an operation and maintenance period, the dynamic differences are difficult to obtain rapid configuration in a virtual reality scene, the augmented reality technology provides a virtualized three-dimensional model of a building structure variable object and is matched with the actual scene of the building structure, the dynamic differences can be rapidly configured through an augmented reality fusion simulation technology, so that three-dimensional space characteristics in the augmented reality scene are consistent with actual building characteristics, and compared with the static model generated by the virtual reality technology, the augmented reality technology adopts a dynamic incremental model, and a basic scene is always a real scene, so that the dynamic changes of the building structure can be responded more rapidly;
2. the incremental model virtual technology under the augmented reality technology is matched with dynamic change characteristics in the operation and maintenance period of the building structure, and the augmented reality scene is combined with the internal force state evaluation of the building structure, so that the augmented reality technology is truly applied to the performance evaluation of the operation and maintenance period of the building structure, the applicability and the efficiency of the internal force safety evaluation of the building structure are improved, and the application breadth and the depth of the augmented reality technology in the building field are improved;
3. based on load working conditions and load combinations, a rapid calculation method of actual internal force safety coefficients of key components in an augmented reality scene is provided, real-time evaluation of the internal force state of the building structure is obtained through comparison with the designed internal force safety coefficients, and efficiency and reliability of the internal force state evaluation are improved.
In the step S2, the corresponding relation between the variable object and the load condition is performed by referring to the following manner:
newly increasing/reducing object load, corresponding to the working condition of secondary constant load, in the form of concentrated force load and uniform load;
newly increasing/reducing personnel load, and corresponding to crowd load working conditions, wherein the form is uniform load;
newly increasing/reducing the load of moving tools such as vehicles and the like, and corresponding to other live load working conditions, wherein the form is a concentrated force load;
newly increasing/reducing wind load, wherein the wind load corresponds to the wind load working condition and is in the form of uniform load;
the temperature and the humidity are newly increased/reduced, and the form is a body load corresponding to the temperature and humidity load working condition.
In the step S4, the method for calculating the actual internal force safety coefficient of the critical component in the real scene is as follows: actual internal force safety coefficient of critical component in real scene = design internal force safety coefficient of critical component x Σ (structural internal force x working condition combination coefficient corresponding to designed load working condition)/Σ (structural internal force x working condition combination coefficient corresponding to load working condition in real scene). The working condition combination coefficient refers to the weight degree considered for a certain type of load when the structural safety is evaluated, and the coefficient can be obtained through experience or related design specifications.
The step S4 further comprises the step that the actual internal force safety coefficient of the key component in the real scene can be directly displayed in the augmented reality scene according to the requirement, so that the internal force can be estimated and used in real time, the internal force state estimation is more visual and convenient, and the working efficiency of the internal force state estimation is improved.
The step S4 further includes pre-simulating a load working condition through an augmented reality technology, pre-knowing an actual internal force safety coefficient of the critical component in a preset scene, and further evaluating an internal force safety state of the building structure in the operation and maintenance period.
Example 2
Unlike example 1, in consideration of degradation of the building structure with time, the design internal force safety factor of the critical component for a given load combination given by the design data of the building structure needs to be periodically corrected, and the step S1 further includes correcting the design internal force safety factor of the critical component as follows:
continuously monitoring the structural internal force of the critical component according to actual load conditions under various different load conditions in a period of time, and acquiring actual internal force data of the critical component;
based on the augmented reality technology, synchronously acquiring the structural internal force of the key component corresponding to the load working conditions under the various different load conditions, and calculating theoretical internal force data of the key component under the load combination;
if the actual internal force under various load conditions is larger than the theoretical internal force, judging that the performance of the critical component is reduced, and adopting the actual internal force to recalculate the designed internal force safety coefficient of the corrected critical component, wherein the designed internal force safety coefficient of the corrected critical component=the designed internal force safety coefficient of the critical component before correction (theoretical internal force/actual internal force) so as to improve the reliability of the internal force evaluation result of the building structure.
The design internal force safety coefficients of the critical components before and after correction can be directly displayed in the augmented reality scene according to the needs, so that the internal force can be estimated and used in real time, the internal force state estimation is more visual and convenient, and the working efficiency of the internal force state estimation is improved.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure are intended to fall within the scope of the claims.
Claims (7)
1. The real-time evaluation method for the internal force of the building operation and maintenance period structure based on the AR technology is characterized by comprising the following steps:
s1: dividing a building structure into blocks, and giving out the designed load working condition and load combination corresponding to each block and the designed internal force safety coefficient of the key components in the building structure under the set load combination;
s2: establishing a corresponding relation between a variable object in a building structure and a load working condition;
s3: tracking registration and scene scanning are carried out on each block based on an augmented reality technology, information of variable objects added and variable objects reduced in each block is given currently, and the variable objects and the load working conditions are converted based on the corresponding relation between the variable objects and the load working conditions to form the load working conditions under a real scene;
s4: building a load combination according to the load working condition in the real scene, comparing the load combination with the designed load combination to obtain the actual internal force safety coefficient of the key component in the real scene, and evaluating the internal force state of the building structure in real time as follows:
when the actual internal force safety coefficient of the critical component is larger than the design internal force safety coefficient of the critical component in a real scene, the building structure is in a safe state;
when the actual internal force safety coefficient of the critical component is smaller than the design internal force safety coefficient of the critical component but larger than 1 in a real scene, the building structure is still in a safe state, but the safety margin is reduced;
when the actual internal force safety coefficient of the key components in the real scene is smaller than 1, the building structure is in a dangerous state;
the calculation method of the actual internal force safety coefficient of the key component in the real scene is as follows: actual internal force safety coefficient of critical component in real scene = design internal force safety coefficient of critical component x Σ (structural internal force x working condition combination coefficient corresponding to designed load working condition)/Σ (structural internal force x working condition combination coefficient corresponding to load working condition in real scene).
2. The AR technology-based real-time assessment method for internal forces of a building operation and maintenance period structure according to claim 1, wherein in the step S2, the correspondence between the variable object and the load condition is as follows:
newly increasing/reducing object load, corresponding to the working condition of secondary constant load, in the form of concentrated force load and uniform load;
newly increasing/reducing personnel load, and corresponding to crowd load working conditions, wherein the form is uniform load;
newly increasing/reducing the load of moving tools such as vehicles and the like, and corresponding to other live load working conditions, wherein the form is a concentrated force load;
newly increasing/reducing wind load, wherein the wind load corresponds to the wind load working condition and is in the form of uniform load;
the temperature and the humidity are newly increased/reduced, and the form is a body load corresponding to the temperature and humidity load working condition.
3. The AR technology-based real-time assessment method for internal forces of a building operation and maintenance period structure according to claim 2, wherein the step S4 further comprises: the actual internal force safety coefficient of the key components in the real scene is directly displayed in the augmented reality scene according to the requirement.
4. The AR technology-based real-time assessment method for internal forces of a building operation and maintenance period structure according to claim 1, wherein the step S4 further comprises: and pre-simulating the load working condition by an augmented reality technology, and pre-knowing the actual internal force safety coefficient of the critical component in a preset scene.
5. The AR technology-based real-time assessment method for internal forces of a building operation and maintenance period structure according to claim 1, wherein the step S1 further comprises the step of correcting the design internal force safety factor of the critical component, as follows:
continuously monitoring the structural internal force of the critical component according to actual load conditions under a plurality of different load conditions in a period of time, and acquiring actual internal force data of the critical component;
synchronously acquiring the structural internal force of the key component corresponding to the load working conditions under the various different load conditions based on an augmented reality technology, and calculating theoretical internal force data of the key component under the load combination;
if the actual internal force under various load conditions is larger than the theoretical internal force, judging that the performance of the critical component is reduced, and recalculating the design internal force safety coefficient of the critical component by adopting the actual internal force.
6. The real-time assessment method for internal force of building operation and maintenance period structure based on AR technology according to claim 5, wherein the calculation method for the design internal force safety coefficient of the corrected critical component is as follows: design internal force safety coefficient of critical component after correction = design internal force safety coefficient of critical component before correction x (theoretical internal force/actual internal force).
7. The AR technology-based real-time assessment method for internal forces of a building operation and maintenance period structure according to claim 5, wherein: the design internal force safety coefficients of the critical components before and after correction are directly displayed on the augmented reality scene according to the requirement.
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| CN106599453A (en) * | 2016-12-12 | 2017-04-26 | 大连文森特软件科技有限公司 | Undersea tunnel building analysis system based on AR technology |
| CN106791630A (en) * | 2016-12-12 | 2017-05-31 | 大连文森特软件科技有限公司 | A kind of building based on AR virtual reality technologies builds supervisory systems |
| CN110533719A (en) * | 2019-04-23 | 2019-12-03 | 以见科技(上海)有限公司 | Augmented reality localization method and device based on environmental visual Feature point recognition technology |
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