CN112651650A - AR technology-based real-time assessment method for internal force of building in operation and maintenance period - Google Patents
AR technology-based real-time assessment method for internal force of building in operation and maintenance period Download PDFInfo
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Abstract
The invention discloses a real-time building operation and maintenance period structure internal force evaluation method based on an AR technology, and relates to the technical field of building construction. The method aims at the problem that the accurate internal force state in the building structure cannot be obtained by the existing method for analyzing the internal force state of the building structure in the operation and maintenance period based on VR and BIM technologies. The evaluation method comprises the following steps: the method comprises the steps of obtaining variable object information in the building structure by utilizing 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 the actual internal force safety coefficient of a key 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 assessment 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 the building structure, especially large public venues (such as gymnasiums and exhibition halls) and roads, bridges and tunnels and the like, random changes of internal and external loads exist, and the changes are directly related to internal force of the building structure. 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.
Generally, the operation and maintenance of a building structure are guaranteed by a safety margin given by early design, but on one hand, the performance of the building structure is degraded continuously along with the increase of the service time of the building structure, and the safety margin is reduced continuously; on the other hand, the building structure may also have an extreme load condition which is not fully considered in the design stage, so that the safety margin has a great probability of failing to meet the safety requirement under the extreme load, therefore, the internal force state evaluation of the building structure should be regularly or continuously monitored and evaluated during the operation and maintenance period of the building structure, and the monitoring and evaluation is mainly characterized by obtaining the variable characteristics of the building structure, mainly characterized by the position, the number, the weight change of people and/or buildings in the actual building structure, the environmental load (such as temperature and humidity), the wind load change and the like.
At present, a Virtual Reality (VR) technology and a BIM technology are used in a combined manner to solve the above problems, and a specific method is to establish a three-dimensional model of a building structure and introduce the variable characteristics into the three-dimensional model of the building structure to analyze and evaluate the internal force.
Disclosure of Invention
The method aims at the problem that the accurate internal force state in the building structure cannot be obtained by the existing method for analyzing the internal force state of the building structure in the operation and maintenance period 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 by the invention for solving the technical problems is as follows: the method for evaluating the internal force of the structure in the operation and maintenance period of the building based on the AR technology comprises the following steps:
s1: dividing blocks of a building structure, and giving a designed load working condition and a designed load combination corresponding to each block and a designed internal force safety coefficient of a key component in the building structure under a set load combination;
s2: establishing a corresponding relation between a variable object in a building structure and a load working condition;
s3: tracking and registering and scene scanning each block based on an augmented reality technology, giving information of increased variable objects and decreased variable objects in each block at present, and converting the variable objects and the load working condition based on the corresponding relation between the variable objects and the load working condition to form the load working condition under a real scene;
s4: establishing 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 critical 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 under the real scene is greater than the design internal force safety coefficient of the critical component, the building structure is in a safe state;
when the actual internal force safety coefficient of the critical component under the real scene is smaller than the designed internal force safety coefficient of the critical component but larger than 1, the building structure is still in a safe state, but the safety margin is reduced;
and when the actual internal force safety coefficient of the critical component under the real scene is less than 1, the building structure is in a dangerous state.
The invention relates to a building operation and maintenance period structure internal force real-time evaluation method based on AR technology, which utilizes augmented reality technology to obtain variable object information in a building structure, integrates load working conditions into an augmented reality scene based on the corresponding relation between a variable object and the load working conditions, establishes a load combination according to the load working conditions in the real scene, compares the load combination with a design load combination to obtain the actual internal force safety coefficient of a critical component in the real scene, and evaluates the building structure internal force state in real time according to the ratio of the actual internal force safety coefficient to the design internal force safety coefficient, and has the following beneficial effects:
1. the augmented reality technology can provide a better solution than the virtual reality technology, which provides a full three-dimensional static model of the building structure, and the full three-dimensional static model and the actual building structure will have dynamic difference in the operation and maintenance period, which are difficult to configure quickly in a virtual reality scenario, while augmented reality technology provides a virtualized three-dimensional model of a variable object of an architectural structure, and the dynamic difference can be rapidly configured by the fusion simulation technology of augmented reality by matching with the actual scene of the building structure, therefore, the three-dimensional space characteristics under the augmented reality scene are consistent with the actual building characteristics, and compared with a static model generated by a virtual reality technology, the augmented reality technology adopts a dynamic incremental model, the basic scene is always a real scene, so that the dynamic change of the building structure can be responded more quickly;
2. the incremental model virtual technology under the augmented reality technology is matched with the 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 really 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 application depth of the augmented reality technology in the building field are improved;
3. based on load working conditions and load combination, a method for quickly calculating the actual internal force safety coefficient of a key component 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 coefficient, and the efficiency and reliability of internal force state evaluation are improved.
Further, in step S2, the variable object and the load condition are related as follows:
newly increasing/reducing object load, corresponding to the second-stage constant load working condition, in the form of concentrated force load and uniformly distributed load;
newly increasing/reducing personnel load, and corresponding to the load working condition of the crowd, wherein the form is uniform load;
increasing/reducing loads of moving machines such as vehicles and the like, and corresponding to other active load working conditions in the form of concentrated force loads;
newly increasing/reducing wind load, corresponding to the wind load working condition, in the form of uniformly distributed load;
and newly increasing/reducing the temperature and humidity, and corresponding to the temperature and humidity load working condition in the form of body load.
Further, in step S4, the method for calculating the actual internal force safety factor of the critical component in the real scene is as follows: the actual internal force safety coefficient of the critical component in the real scene is equal to the design internal force safety coefficient of the critical component × Σ (structural internal force × working condition combination coefficient corresponding to the designed load working condition)/Σ (structural internal force × working condition combination coefficient corresponding to the load working condition in the real scene).
Further, the step S4 includes displaying the safety factor of the actual internal force of the key component in the real scene directly in the augmented reality scene as required.
Further, the step S4 further includes: simulate in advance through augmented reality technology the load operating mode learns in advance key component is actual internal force factor of safety under the scene of predetermineeing.
Further, the step S1 further includes modifying the design internal force safety factor of the critical component, and includes the following steps: continuously monitoring the structural internal force of the critical component aiming at actual load conditions under various 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;
and if the actual internal forces under various different load conditions are all larger than the theoretical internal forces, judging that the performance of the key component is reduced, and recalculating the design internal force safety coefficient of the key component by adopting the actual internal forces.
Further, the method for calculating the design internal force safety factor of the corrected critical component is as follows: the design internal force safety factor of the critical component after correction is the design internal force safety factor of the critical component before correction x (theoretical internal force/actual internal force).
Furthermore, the design internal force safety factor of the key components before and after correction can be directly displayed in the augmented reality scene according to the requirement.
Drawings
Fig. 1 is a flowchart of an embodiment of a real-time evaluation and correction method for internal force of a building operation and maintenance period structure based on AR technology.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example 1
The method for real-time evaluation of internal force of a building operation and maintenance period structure based on the AR technology is described by combining with figure 1, and comprises the following specific steps:
s1: dividing blocks of the building structure, wherein the blocks have the significance of internal force evaluation, such as large public venues divided according to floors or rooms, roads, bridges and tunnels divided according to kilometers and the like; for each block, based on building structure design data, providing the load working conditions (such as concentrated force, uniformly distributed load, body load and the like), load combinations and design internal force safety coefficients of key components under the set load combinations, 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 and registering and scene scanning are carried out on each block based on an augmented reality technology, information of increased variable objects and decreased variable objects in each block is given, and the variable objects and 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 real scenes are formed quickly;
s4: establishing a load combination according to the load working condition in a 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 designed 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 in a real scene is smaller than the designed internal force safety coefficient of the critical component but larger than 1, the building structure is still in a safe state, but the safety margin is reduced;
and when the actual internal force safety coefficient of the critical component under the real scene is less than 1, the building structure is in a dangerous state.
Simply express that
The actual internal force safety coefficient is more than or equal to the design internal force safety coefficient safety
Actual internal force safety factor of 1 or more < design internal force safety factor safety but safety margin reduction
Actual internal force safety factor <1 danger
The invention relates to a building operation and maintenance period structure internal force real-time evaluation method based on AR technology, which utilizes augmented reality technology to obtain variable object information in a building structure, integrates load working conditions into an augmented reality scene based on the corresponding relation between a variable object and the load working conditions, establishes a load combination according to the load working conditions in the real scene, compares the load combination with a design load combination to obtain the actual internal force safety coefficient of a critical component in the real scene, and evaluates the building structure internal force state in real time according to the ratio of the actual internal force safety coefficient to the design internal force safety coefficient, and has the following beneficial effects:
1. augmented Reality (AR for short) can effectively integrate virtual objects into an actual scene, so as to provide a simulation calculation in advance for virtual object arrangement in the actual scene, and has a higher use value in the aspects of meeting the requirements of virtual construction and virtual maintenance in the building industry, but for the requirements of virtual operation and maintenance of a building structure, the Augmented Reality technology can provide a better solution compared with the virtual Reality technology, and has the distinctive advantages that: the virtual reality technology provides a full three-dimensional static model of a building structure, dynamic differences occur between the full three-dimensional static model and an actual building structure in an operation and maintenance period, the dynamic differences are difficult to be rapidly configured in a virtual reality scene, the augmented reality technology provides a virtualized three-dimensional model of a variable object of the building structure and is matched with the actual scene of the building structure, and the dynamic differences can be rapidly configured through an augmented reality fusion simulation technology, so that three-dimensional space characteristics under the augmented reality scene are consistent with actual building characteristics, therefore, 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 dynamic changes of the building structure can be more rapidly responded;
2. the incremental model virtual technology under the augmented reality technology is matched with the 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 really 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 application depth of the augmented reality technology in the building field are improved;
3. based on load working conditions and load combination, a method for quickly calculating the actual internal force safety coefficient of a key component 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 coefficient, and the efficiency and reliability of internal force state evaluation are improved.
In step S2, the correspondence relationship between the variable object and the load condition is performed as follows:
newly increasing/reducing object load, corresponding to the second-stage constant load working condition, in the form of concentrated force load and uniformly distributed load;
newly increasing/reducing personnel load, and corresponding to the load working condition of the crowd, wherein the form is uniform load;
increasing/reducing loads of moving machines such as vehicles and the like, and corresponding to other active load working conditions in the form of concentrated force loads;
newly increasing/reducing wind load, corresponding to the wind load working condition, in the form of uniformly distributed load;
and newly increasing/reducing the temperature and humidity, and corresponding to the temperature and humidity load working condition in the form of body load.
In step S4, the method for calculating the actual internal force safety factor of the critical component in the real scene is as follows: the actual internal force safety coefficient of the critical component in the real scene is equal to the design internal force safety coefficient of the critical component × Σ (structural internal force × working condition combination coefficient corresponding to the designed load working condition)/Σ (structural internal force × working condition combination coefficient corresponding to the load working condition in the real scene). The working condition combination coefficient refers to the weight degree considered for a certain type of load when evaluating the safety of the structure, and the coefficient can be obtained through experience or related design specifications.
The step S4 further includes that the actual internal force safety coefficient of the critical component in the real scene can be directly displayed in the augmented reality scene as required for the real-time internal force evaluation, which is more intuitive and convenient, and improves the working efficiency of the internal force state evaluation.
The step S4 further includes simulating the load condition in advance through the augmented reality technology, obtaining the actual internal force safety factor of the critical component in the preset scene in advance, and further evaluating the internal force safety state of the building structure during the operation and maintenance period.
Example 2
Unlike embodiment 1, in consideration of the degradation of the building structure with time, the design internal force safety factor of the critical component under the given load combination given by the building structure design data needs to be periodically modified, and the step S1 further includes modifying the design internal force safety factor of the critical component, which includes the following steps:
continuously monitoring the structural internal force of the key component aiming at the actual load conditions under various different load conditions in a period of time, and acquiring the actual internal force data of the key component;
based on an 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 the theoretical internal force data of the key component under the load combination;
if the actual internal force under various different load conditions is larger than the theoretical internal force, the performance of the key component is judged to be reduced, the design internal force safety coefficient of the corrected key component is recalculated by adopting the actual internal force, and the design internal force safety factor of the key component after the correction is x (theoretical internal force/actual internal force) of the key component before the correction, so as to improve the reliability of the internal force evaluation result of the building structure, it should be noted that, the accuracy of the internal force safety coefficient obtained by the correction method is lower than that obtained by newly analyzing the building structure, however, in the operation and maintenance period of the building structure, the efficiency of correcting the internal force safety coefficient by using the correction method is higher, and in addition, under the condition that the internal force safety coefficient is higher, the calculation precision of the internal force safety evaluation method is enough to meet the precision requirement of the internal force safety evaluation in the operation and maintenance period.
The design internal force safety coefficient of the key component before and after correction can be directly displayed in an augmented reality scene according to needs, so that the internal force can be evaluated and used in real time, the method is more visual and convenient, and the working efficiency of internal force state evaluation is improved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (8)
1. The method for evaluating the internal force of the structure in the operation and maintenance period of the building based on the AR technology is characterized by comprising the following steps of:
s1: dividing blocks of a building structure, and giving a designed load working condition and a designed load combination corresponding to each block and a designed internal force safety coefficient of a key component in the building structure under a set load combination;
s2: establishing a corresponding relation between a variable object in a building structure and a load working condition;
s3: tracking and registering and scene scanning each block based on an augmented reality technology, giving information of increased variable objects and decreased variable objects in each block at present, and converting the variable objects and the load working condition based on the corresponding relation between the variable objects and the load working condition to form the load working condition under a real scene;
s4: establishing 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 critical 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 under the real scene is greater than the design internal force safety coefficient of the critical component, the building structure is in a safe state;
when the actual internal force safety coefficient of the critical component under the real scene is smaller than the designed internal force safety coefficient of the critical component but larger than 1, the building structure is still in a safe state, but the safety margin is reduced;
and when the actual internal force safety coefficient of the critical component under the real scene is less than 1, the building structure is in a dangerous state.
2. The method for real-time evaluation of internal force of building operation and maintenance period structure based on AR technology as claimed in claim 1, wherein in step S2, the correspondence relationship between the variable object and the load condition is as follows:
newly increasing/reducing object load, corresponding to the second-stage constant load working condition, in the form of concentrated force load and uniformly distributed load;
newly increasing/reducing personnel load, and corresponding to the load working condition of the crowd, wherein the form is uniform load;
increasing/reducing loads of moving machines such as vehicles and the like, and corresponding to other active load working conditions in the form of concentrated force loads;
newly increasing/reducing wind load, corresponding to the wind load working condition, in the form of uniformly distributed load;
and newly increasing/reducing the temperature and humidity, and corresponding to the temperature and humidity load working condition in the form of body load.
3. The method for real-time assessment of internal force of a building during operation and maintenance period based on AR technology as claimed in claim 1, wherein in said step S4, the calculation method of the safety factor of actual internal force of the critical component in real scene is as follows: the actual internal force safety coefficient of the critical component in the real scene is equal to the design internal force safety coefficient of the critical component × Σ (structural internal force × working condition combination coefficient corresponding to the designed load working condition)/Σ (structural internal force × working condition combination coefficient corresponding to the load working condition in the real scene).
4. The method for real-time assessment of internal force of building operation and maintenance period structure based on AR technology according to claim 3, wherein said step S4 further comprises: and the actual internal force safety coefficient of the key component in the real scene is directly displayed in the augmented reality scene according to the requirement.
5. The method for real-time assessment of internal force of building operation and maintenance period structure based on AR technology as claimed in claim 1, wherein said step S4 further comprises: simulate in advance through augmented reality technology the load operating mode learns in advance key component is actual internal force factor of safety under the scene of predetermineeing.
6. The method for real-time evaluation of internal force of building operation and maintenance period structure based on AR technology as claimed in claim 1, wherein said step S1 further comprises modifying the safety factor of internal force design of said critical component, the steps are as follows:
continuously monitoring the structural internal force of the critical component aiming at actual load conditions under various 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;
and if the actual internal forces under various different load conditions are all larger than the theoretical internal forces, judging that the performance of the key component is reduced, and recalculating the design internal force safety coefficient of the key component by adopting the actual internal forces.
7. The method for real-time evaluation of internal force of building operation and maintenance period structure based on AR technology as claimed in claim 6, wherein the calculation method of the safety factor of the design internal force of the corrected key component is as follows: the design internal force safety factor of the critical component after correction is the design internal force safety factor of the critical component before correction x (theoretical internal force/actual internal force).
8. The AR technology-based real-time assessment method for internal force of building operation and maintenance period structure according to claim 6, wherein: the design internal force safety coefficient of the key component before and after correction is directly displayed in 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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