Bridge construction global monitoring method and system based on finite element real-time calculation

Abstract

The invention discloses a bridge construction global monitoring method and system based on finite element real-time calculation, and the method comprises the steps: constructing a bridge finite element model, carrying out the division of finite element units, carrying out the unique coding of each unit, and dividing the construction stages; a three-dimensional space geometric corresponding relation between the finite element model and the BIM model is constructed, and mapping of finite element units and BIM model components is carried out; determining an allowable stress through a construction material of a bridge member, and further setting an early warning threshold value of each unit of the finite element; load variables needing to be considered in the construction process are determined; configuring a finite element calculation server to perform real-time calculation; obtaining a finite element calculation result, modifying the stress of each component of the three-dimensional BIM model according to the result, and globally displaying the result; and a three-level early warning mechanism is set for monitoring and early warning. The invention provides a comprehensive supervision method for knowing the global stress state of the bridge and guaranteeing the safety of the bridge.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering construction and maintenance monitoring, and more specifically, relates to a global monitoring method and system for bridge construction based on real-time finite element calculation. Background Art

[0002] During the entire life cycle of a bridge, from construction to operation and subsequent long-term maintenance, ensuring the structural safety and stable operation is always the core task, and finite element calculation plays a key role in this process. Traditional finite element calculation techniques mostly build models according to design schemes, input design loads, and use commercial software such as ANSYS to focus on analyzing key components with stress concentration. Subsequently, warning thresholds are set based on the allowable stress of the materials of key components, and stress sensors are installed on these components. By comparing the sensor values with the thresholds, monitoring and warning during the construction and operation stages are achieved.

[0003] However, with the development of bridge engineering, many limitations have emerged in the traditional method. During the construction stage, the calculation using commercial software requires extremely high professionalism and complex processes. Once design changes, process adjustments, or sudden weather conditions occur at the construction site, recalculation is time-consuming and laborious, seriously affecting the timeliness of construction monitoring and making it difficult to meet the urgent need for timely feedback on the structural mechanical state during the construction process. At the same time, the construction site conditions are complex, and there are often differences between the actual load and the design load, which may cause the originally identified key components not to be the actual key parts, resulting in stress sensors not being installed on the truly key components and forming safety supervision loopholes.

[0004] When entering the operation stage, the problems are equally prominent. The dynamic changes in traffic flow, vehicle load types, and the long-term effects of environmental factors such as temperature, humidity, and wind force are all different from the design expectations. Relying solely on the traditional finite element calculation and monitoring method based on key components is difficult to comprehensively reflect the mechanical state of the overall bridge structure under complex and changeable actual operation conditions. Since the stress changes of each part of the bridge cannot be timely and accurately grasped, the opportunity to detect and handle early diseases may be missed, increasing the safety risk of the bridge structure and shortening the service life. Moreover, this method cannot comprehensively evaluate problems such as local damage accumulation and structural performance degradation that may occur during the long-term use of the bridge, which is not conducive to formulating scientific and reasonable maintenance strategies.

[0005] In view of this, there is an urgent need to construct an innovative real-time finite element calculation system applicable to the comprehensive application scenarios of bridge construction and operation. By creating an efficient finite element calculation server, load data at the construction and operation sites can be obtained in real time. Whether it is the mechanical equipment load and material stacking load during the construction stage, or the traffic load and environmental load during the operation stage, etc., they can all be accurately collected and used for calculation. This system can not only monitor the stress state of each part of the bridge in real time, realize the real-time and comprehensiveness of construction monitoring, and effectively solve the problems during the construction stage; but also continuously track the bridge structure state during the operation stage, promptly detect potential safety hazards, provide strong guarantee for the long-term safe operation of the bridge, truly realize the global monitoring of the entire life cycle of the bridge, and greatly improve the safety and reliability of the bridge. Summary of the Invention

[0006] The present invention aims to overcome the defects of existing bridge monitoring technologies in the construction, operation, and maintenance stages. By constructing an efficient finite element calculation server, load data is obtained in real time, real-time monitoring and early warning of the global stress state of the bridge are realized, the calculation efficiency is improved, the adaptability to complex working conditions is enhanced, and the safety and stability of the entire life cycle of the bridge are ensured.

[0007] In view of the above defects or improvement requirements of the existing technology, the present invention provides a global monitoring method for bridge construction based on real-time finite element calculation, including: S1. Construct a bridge finite element model, encode each finite element unit to ensure the uniqueness of the encoding, determine the bridge construction stage according to the construction plan, assign corresponding construction stage attributes to each unit according to the completion sequence relationship of different parts during construction, and store the constructed finite element model in the database, and assign a unique bridge identification code; S2. Construct the three-dimensional space geometric correspondence between the finite element model and the BIM model, and perform the mapping between the finite element unit and the BIM model component; S3. Determine the allowable stress based on the construction materials of the bridge components, and further set the warning threshold for each unit of the finite element; S4. Determine the load variables to be considered during the construction process; S5. Configure the finite element calculation server for real-time calculation; S6. Obtain the finite element calculation results, modify the stress of each component of the three-dimensional BIM model according to the results, and globally display the results; S7. Set a three-level early warning mechanism for monitoring and early warning.

[0008] Furthermore, in S1, when encoding each finite element unit, a globally unique UUID is randomly generated for each unit using the MD5 algorithm. <..

[0009] Further, the specific method for the mapping between the finite element cells and the BIM model components in S2 is as follows: Each finite element cell corresponds to a unique BIM model component, while a BIM model component corresponds to multiple finite element cells; Read the BIM model data. Starting from the first component, first create an enclosing sphere and record the center coordinates and radius of the sphere; Traverse all the finite element cells that have not been mapped yet, calculate their distances to the center of the sphere, and quickly screen out the candidate finite element cells by the distance being less than the radius of the sphere; Perform a fine calculation on the candidate finite element cells and the BIM model components. If the BIM model component completely contains the finite element cell, establish a mapping relationship, record the BIM model component code in the attributes of the finite element cell, and store it in the database; Loop through all the components of the BIM model to perform the operation until all the finite element cells are mapped.

[0010] Further, the specific method for setting the warning threshold for each unit of the finite element in S3 is as follows: Through the design information, obtain the construction materials of each component of the BIM model and find the allowable stress of the materials; Using the mapping relationship, find the finite element cells corresponding to each BIM model component, set the allowable stress attribute for the finite element cells, and store it in the corresponding field of the database; Set the warning threshold for each finite element cell. Take values between 65% - 75% of the allowable stress to set the third - level warning threshold, values between 75% - 85% to set the second - level warning threshold, and values between 85% - 95% to set the first - level warning threshold, and store them in the corresponding fields of the database respectively.

[0011] Further, the specific process for determining the load variables to be considered during the construction process in S4 is as follows: Determine the environmental loads, including temperature, wind speed, and wind direction, and assign unique ID numbers to them in the monitoring result database respectively; Determine the weight loads, including the magnitude and position of the weight, and assign unique ID numbers to them in the monitoring result database respectively; Configure a corresponding bridge identification code for each load variable for easy real - time query and acquisition during subsequent calculations; Bind the construction site instrument code with the ID number of the corresponding load variable, and use the network interface to regularly transmit the acquisition results to the database.

[0012] Further, the process for obtaining the load variables is as follows: At the project site, sensors, cameras, and weighing modules are installed to obtain real-time load parameters during bridge construction, and they are transmitted to the finite element calculation server through wireless communication or the Internet of Things for real-time calculation; the environmental load is obtained by the sensors installed on site; the weight load is obtained by the weighing module, and the vehicle position is identified in combination with the camera to analyze the magnitude and position of the weight load.

[0013] Further, in step S5, a finite element calculation server is configured, and the specific method for real-time calculation is as follows: On the server, start a new finite element real-time calculation task and input the corresponding bridge identification code; The server imports the finite element model from the database according to the bridge identification code; Based on the current bridge construction stage, determine the finite element units that need to be designed for the current calculation. Compare the construction stage attributes of each unit with the current construction stage. If the time is after the current construction stage, no calculation is performed; Read the latest load data from the database through the bridge identification code, including temperature, wind speed, wind direction, weight magnitude, and weight position; Perform calculations at regular intervals, and set the time interval between 1 second and 3 seconds to ensure the real-time nature of the calculation.

[0014] Further, the three-level early warning mechanism in step S7 is specifically as follows: The server calculates the real-time stress of each finite element unit in real time and compares the real-time stress with the three-level early warning value of the corresponding unit; If an early warning is triggered, send an early warning message to the front-end display. The content of the message includes: finite element unit code, finite element unit coordinate position, real-time stress value, and early warning level; When the front-end receives the message and determines it is an early warning, add an early warning mark at the corresponding position in the 3D model based on the coordinate position; Set the three-level early warning as a yellow mark to remind the staff to pay attention to the construction situation; Set the two-level early warning as an orange mark to remind the staff to take necessary measures to reduce risks; Set the one-level early warning as a red mark to remind the staff to urgently suspend construction and eliminate risks.

[0015] As the second aspect of the present invention, a global monitoring system for bridge construction based on finite element real-time calculation is provided, including: A finite element model construction unit for constructing a bridge finite element model, encoding each finite element unit to ensure the uniqueness of the encoding, determining the bridge construction stage according to the construction plan, assigning corresponding construction stage attributes to each unit according to the completion sequence of different parts of the construction, storing the constructed finite element model in the database, and allocating a unique bridge identification code; A finite element and BIM model mapping unit, which is used to construct the three-dimensional spatial geometric correspondence between the finite element model and the BIM model, and perform the mapping between the finite element and the BIM model components; A unit for determining the stress warning threshold, which is used to determine the allowable stress through the construction materials of the bridge components, and further set the warning threshold for each unit of the finite element; A unit for determining the load variable, which is used to determine the load variables that need to be considered during the construction process; A configuration calculation server and a real-time calculation unit, which are used to configure the finite element calculation server and perform real-time calculations; A finite element result display unit, which is used to obtain the finite element calculation results in real time on the front-end web page, modify the stress of each component of the three-dimensional BIM model according to the results, and globally display the results; A monitoring and warning unit, which is used to set a three-level warning mechanism for monitoring and warning.

[0016] As the third aspect of the present invention, a computer-readable storage medium is further provided, on which a computer program is stored, and the computer program is executed by a processor to perform any step of the above-mentioned global monitoring method for bridge construction based on real-time finite element calculation.

[0017] Generally speaking, compared with the prior art through the above technical solutions conceived by the present invention, the following beneficial effects can be achieved: [[ID=1,9]]1. The global monitoring method for bridge construction based on real-time finite element calculation of the present invention realizes efficient real-time finite element calculation by constructing a special finite element calculation server, carefully writing an adapted algorithm core, and giving full play to the parallel computing power of a high-performance GPU. It changes the previous situation of relying on complex commercial software, can quickly respond to changing on-site situations, greatly improves the calculation efficiency, ensures the timeliness of construction monitoring, enables the structural mechanics state during the construction process to be timely feedback, and provides strong support for construction decisions.

[0018] 2. The global monitoring method for bridge construction based on real-time finite element calculation of the present invention assigns a unique UUID code generated based on the MD5 algorithm to each unit when constructing the bridge finite element model. This code becomes the unique identifier of the unit in the global scope and is closely linked to each module. In the finite element calculation module, it enables the server to accurately identify each unit, efficiently analyze the units in the entire domain, ensure that the calculation results accurately correspond to the actual parts, and provide a reliable data basis for global monitoring.

[0019] 3. The global monitoring method for bridge construction based on real-time finite element calculation of the present invention uses the front-end WebGL technology combined with a 3D BIM model to present the calculation results through a monitoring and display module. The unique encoding of each unit ensures the precise positioning of each unit in the 3D model, realizing a one-to-one correspondence between the virtual model and the actual bridge structure. In the early warning link, the position of the warning unit can be quickly locked by virtue of the encoding, and the influence range is globally displayed in linkage. Construction personnel can intuitively understand the status of each part of the bridge from a global perspective, take timely measures, realize all-round and non-blind-spot global monitoring, and effectively guarantee the safety of bridge construction and operation. Description of the Drawings

[0020] Figure 1 It is a flow chart of the global monitoring method for bridge construction based on real-time finite element calculation according to an embodiment of the present invention; Figure 2 It is the overall architecture of the global monitoring method for bridge construction based on real-time finite element calculation according to an embodiment of the present invention; Figure 3 It is a global stress display diagram of the main tower construction stage according to an embodiment of the present invention; Figure 4 It is a global stress display diagram of the hoisting stage 1 according to an embodiment of the present invention; Figure 5 It is a global stress display diagram of the hoisting stage 2 according to an embodiment of the present invention; Figure 6 It is a global stress display diagram of the closure according to an embodiment of the present invention; Figure 7 It is a system unit diagram according to an embodiment of the present invention. Detailed Embodiments

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Embodiment 1 Please refer to Figure 1 , Embodiment 1 of the present invention provides a global monitoring method for bridge construction based on real-time finite element calculation, including: Embodiment 1 aims to construct an efficient finite element calculation server, obtain the load data of the bridge construction site in real time for calculation, and monitor the real-time stress state of each part of the bridge for monitoring and early warning. The method ensures the real-time nature of construction monitoring through real-time calculation, and realizes comprehensive safety monitoring without omission by monitoring the state of each part of the bridge, ensuring the globality of monitoring.

[0023] Please refer to Figure 2 , and the method is generally divided into three major modules: 1. Finite element calculation module. By writing the core of the finite element calculation algorithm, a finite element calculation server is constructed, and the high-performance GPU parallel computing power is utilized to improve the finite element calculation efficiency; on the other hand, through flexible interface calls, real-time finite element calculations are performed to obtain results, ensuring the real-time monitoring.

[0024] 2. Load monitoring module. At the project site, sensors are installed to obtain real-time load parameters during bridge construction, and they are transmitted to the finite element calculation server via wireless communication or the Internet of Things for real-time calculation. These parameters include: environmental loads: temperature, wind speed, wind direction; vehicle weighing of weight loads, combined with intelligent identification of vehicle positions by cameras to analyze the magnitude and position of weight loads.

[0025] 3. Monitoring and display module. At the monitoring and display end, a web-based construction monitoring software is built using the front-end webgl technology. The real-time calculation results of the server are obtained through network interfaces, and the finite element calculation results are globally displayed in combination with the three-dimensional BIM model; at the same time, the result status of all components is monitored for real-time safety warnings.

[0026] The following elaborates on the specific implementation steps in Embodiment 1: (1) Construct a bridge finite element model According to the design drawings, finite element units are divided; when dividing finite element units, the calculation accuracy and efficiency need to be considered. For stress concentration or complex structural areas such as the bottom of the main bridge tower and the connection between the pier and the foundation, smaller-sized units are used for fine division to accurately capture the details of mechanical responses; for regular-structured and uniformly-loaded parts such as equal-section beam segments, the unit size is appropriately increased to control the overall calculation amount.

[0027] Using the MD5 algorithm, a globally unique UUID code is randomly generated for each finite element unit. This code serves as the exclusive identifier of the unit in the entire monitoring system, ensuring that different units can be accurately distinguished and identified in data interaction, analysis and calculation, etc.

[0028] According to the construction plan, sort out the sequence of completion of each part of the bridge construction, and accordingly assign the corresponding construction stage attributes to each finite element unit. For example, in a bridge constructed by cantilever casting, the segment units constructed earlier correspond to earlier construction stages, and the segment units constructed later correspond to later stages. In this way, the system can dynamically track the state changes of each unit at different construction times.

[0029] Store the completed finite element model in the database and assign it a unique bridge identification code. This identification code, like the "ID card" of the model, plays a crucial indexing role in subsequent operations such as calling, updating, and associating other data with the model.

[0030] (2)Finite Element Unit and BIM Model Construction Mapping Clarify the correspondence that each finite element unit uniquely corresponds to a BIM model component, while a BIM model component can correspond to multiple finite element units. Due to the different partitioning methods of the finite element model and the BIM model, the finite element model divides the units very finely to achieve accurate mechanical simulation; while the BIM model is divided according to bridge components, for example, a pier is regarded as a component. Therefore, each finite element unit will correspond to a unique BIM model component, and a BIM model component will correspond to multiple finite element units. This mapping relationship is the basis for realizing the visualization display of the finite element calculation results and the BIM model.

[0031] Use Python to write a script to read the BIM model data. Starting from the first component, construct an enclosing sphere and record the sphere center coordinates and radius. By traversing all the finite element units that have not been mapped yet, calculate their distances to the sphere center, and select the finite element units with distances less than the sphere radius as candidate units. This method can quickly narrow down the screening range and improve the mapping efficiency.

[0032] Perform precise geometric calculations on the candidate finite element units and the BIM model components to determine whether the BIM model component completely contains the finite element unit. If the condition is met, establish a mapping relationship, record the BIM model component code in the finite element unit attributes, and store it in the database. By looping through all the components of the BIM model and repeating the above operations until all finite element units are mapped.

[0033] After completing the preliminary mapping, verify the mapping results to check for any mapping errors or omissions. The mapping relationship can be visually displayed through a visualization tool, and abnormal mappings can be adjusted manually. At the same time, establish a dynamic update mechanism for the mapping relationship. When the finite element model or the BIM model changes, update the mapping relationship in a timely manner to ensure the accuracy and consistency of the mapping.

[0034] (3)Determine the Stress Warning Threshold Determine the allowable stress based on the construction materials of the bridge components, and then set the warning threshold for each unit of the finite element.

[0035] Accurately obtain the construction material information of each component in the BIM model through design information, and then consult relevant material standards and specifications to determine the allowable stress of the material. The allowable stress of the material is a fixed value, which is determined according to the mechanical properties of the material and the engineering safety requirements.

[0036] Utilize the established mapping relationship between the finite element elements and the components of the BIM model to find the corresponding finite element elements for each component of the BIM model, and set the allowable stress attribute for these finite element elements, and store them in the corresponding fields of the database. In this way, each finite element element has a corresponding allowable stress, providing a basis for subsequent early warning judgment.

[0037] Set early warning thresholds for each finite element element. Take values between 65% - 75% of the allowable stress to set the third-level early warning threshold, values between 75% - 85% to set the second-level early warning threshold, and values between 85% - 95% to set the first-level early warning threshold, and store them in the corresponding fields of the database respectively. Different levels of early warning thresholds correspond to different risk levels, facilitating the timely discovery and handling of potential safety problems.

[0038] Considering that the material properties may be affected by factors such as environment and time during the construction process, establish a dynamic adjustment mechanism for the early warning thresholds. Regularly detect and evaluate the materials, and adjust the early warning thresholds in a timely manner according to the detection results to ensure the accuracy and reliability of the early warning.

[0039] (4)Determine the load variables Determine the load variables that need to be considered during the construction process as required; determine the environmental loads and weight loads that need to be considered during the construction process. Environmental loads include temperature, wind speed, wind direction, etc., and weight loads include the weight and position of construction equipment, materials, etc. In the monitoring result database, assign a unique ID number to each of these load variables respectively, so as to accurately manage and query different types of load data.

[0040] Configure the corresponding bridge identification code for each load variable, so that during the finite element calculation, various load data corresponding to the bridge can be quickly and accurately queried and obtained from the database according to the bridge identification code, providing data support for accurate calculation.

[0041] Bind the instrument code used for collecting load data at the construction site with the ID number of the corresponding load variable. Use the network interface to regularly transmit the real-time data collected by the instrument into the database at a set time interval (such as 1 minute) to ensure the timeliness and accuracy of the load data.

[0042] Establish a load data quality monitoring mechanism to check the accuracy and integrity of the collected data in real time. For abnormal data, such as data beyond the reasonable range, missing data, etc., mark and process them in a timely manner. Data quality monitoring can be carried out by setting data thresholds, data continuity checks, etc. to ensure the reliability of the data used in the calculation.

[0043] (5)Configure the finite element calculation server for real-time calculation On the server side, start a new finite element real-time calculation task and pass in the corresponding bridge identification code. Based on this identification code, the server quickly imports the corresponding bridge finite element model from the database to prepare for subsequent real-time calculations.

[0044] Determine the finite element units involved in the current calculation based on the current bridge construction stage. By comparing the construction stage attributes of each unit with the current construction stage, if the construction stage of a unit is after the current construction stage, then the unit does not participate in this calculation. This can effectively reduce the amount of calculation and improve the calculation efficiency.

[0045] The server reads the latest load data from the database according to the bridge identification code, including temperature, wind speed, wind direction, weight magnitude, weight position, etc. These real-time and accurate load data are key input parameters for finite element calculations and directly affect the accuracy of the calculation results.

[0046] Set up a timed calculation mechanism, set the calculation interval time to 2 seconds to ensure the real-time nature of the calculation. In each calculation, use the latest load data and the finite element units corresponding to the current construction stage for calculation, and update the stress state of the bridge structure in a timely manner.

[0047] To improve the calculation efficiency, optimize and schedule the calculation resources of the finite element calculation server. Parallel computing technology can be adopted to use multi-core processors or distributed computing clusters to process multiple calculation tasks simultaneously. At the same time, reasonably allocate calculation resources according to the priority and complexity of the calculation tasks to ensure that the calculation tasks can be completed efficiently.

[0048] (6)Finite element result display Please refer to Figures 3 - 6 , on the front-end web page, obtain the finite element calculation results in real time, modify the stress of each component of the 3D BIM model according to the results, and globally display the results; the front-end web page establishes real-time communication with the finite element calculation server to obtain the calculation results in real time. According to the calculation results, dynamically modify the stress display status of each component in the 3D BIM model. Color gradients, numerical annotations, etc. can be used to intuitively express the stress magnitude, enabling construction personnel to quickly understand the stress distribution of each part of the bridge.

[0049] To improve the user experience, a visual interaction function is designed on the front-end web page. For example, users can view different perspectives and detailed information of the 3D BIM model through operations such as mouse clicks, zooming, and rotating; they can select different construction stages to view the stress distribution in that stage; they can also locally magnify a specific area to analyze the stress changes in that area in detail.

[0050] Add a data statistics and analysis function on the front-end web page to statistically analyze the finite element calculation results. For example, calculate statistical indicators such as the maximum stress and average stress in different construction stages, draw stress change curves, and visually display the change trends of stress over time and construction stages. Through these analysis results, help construction personnel better understand the mechanical properties and safety conditions of the bridge structure.

[0051] (7) Monitoring and Warning Monitor the stress state of every part of the entire construction bridge, set up a three-level warning mechanism for monitoring and warning; the server calculates in real time to obtain the real-time stress of each finite element unit and compares it with the three-level warning values of the corresponding unit. Once the real-time stress reaches or exceeds the three-level warning threshold, the warning mechanism is immediately triggered.

[0052] If a warning is triggered, the server sends detailed warning information to the front-end display interface, including the finite element unit code, finite element unit coordinate position, real-time stress value, warning level, etc. At the same time, in order to ensure that the warning information can be promptly conveyed to relevant personnel, the warning information can be sent to construction management personnel and technical personnel via text messages, emails, etc.

[0053] After the front-end receives the warning information, according to the coordinate position, add eye-catching warning marks at the corresponding positions in the 3D model. Set the three-level warning as a yellow mark to remind the staff to pay attention to the construction situation; the second-level warning as an orange mark to remind the staff to take necessary measures to reduce risks; the first-level warning as a red mark to warn the staff to immediately suspend construction and eliminate risks. At the same time, set up a warning information list on the front-end web page to display all warning information for the convenience of construction personnel to view and handle.

[0054] Establish a perfect warning response and handling process, clarify the handling responsible persons and handling measures for different levels of warnings. When a warning occurs, the relevant responsible persons should immediately handle it according to the handling process, analyze the warning reasons, and take corresponding measures to eliminate potential safety hazards. At the same time, record and track the warning handling situation to form a closed-loop management of warning handling.

[0055] Embodiment 2 Please refer to Figure 7. Embodiment 2 provides a global monitoring system for bridge construction based on real-time finite element calculation, including: The finite element model construction unit is used to construct the finite element model of the bridge, encode each finite element unit to ensure the uniqueness of the encoding, determine the bridge construction stages according to the construction plan, assign corresponding construction stage attributes to each unit according to the construction completion sequence of different parts, store the constructed finite element model in the database, and allocate a unique bridge identification code; The finite element and BIM model mapping unit is used to construct the three-dimensional spatial geometric correspondence between the finite element model and the BIM model, and perform the mapping between the finite element units and the BIM model components; The stress warning threshold determination unit is used to determine the allowable stress through the construction materials of the bridge components, and further set the warning threshold for each unit of the finite element; The load variable determination unit is used to determine the load variables to be considered during the construction process; The configuration calculation server and real-time calculation unit is used to configure the finite element calculation server and perform real-time calculations; The finite element result display unit is used to obtain the finite element calculation results, modify the stress of each component of the three-dimensional BIM model according to the results, and globally display the results; The monitoring and warning unit is used to set a three-level warning mechanism for monitoring and warning.

[0056] Embodiment 3 Embodiment 3 of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, any step of the global monitoring method for bridge construction based on finite element real-time calculation can be implemented.

[0057] The computer-readable storage medium may include various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0058] For the introduction of the computer-readable storage medium provided in the present application, please refer to the above method embodiments, and the present application will not elaborate here.

[0059] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A global monitoring method for bridge construction based on real-time finite element calculation, characterized in that, Including: S1. Construct a finite element model of the bridge, encode each finite element unit to ensure the uniqueness of the encoding, determine the bridge construction stages according to the construction plan, assign corresponding construction stage attributes to each unit according to the sequence of construction completion of different parts, store the constructed finite element model in the database, and assign a unique bridge identification code. S2. Establish the three-dimensional spatial geometric correspondence between the finite element model and the BIM model, and perform the mapping between the finite element units and the BIM model components. S3. Determine the allowable stress based on the construction materials of the bridge components, and further set the warning threshold for each unit of the finite element. S4. Determine the load variables to be considered during the construction process. S5. Configure the finite element calculation server for real-time calculation. S6. Obtain the finite element calculation results, modify the stress of each component of the three-dimensional BIM model according to the results, and globally display the results. S7. Set up a three-level warning mechanism for monitoring and warning.

2. The global monitoring method for bridge construction based on real-time finite element calculation according to claim 1, wherein, In S1, when encoding each finite element unit, use the MD5 algorithm to randomly generate a globally unique UUID for each unit.

3. The global monitoring method for bridge construction based on real-time finite element calculation according to claim 1, wherein, The specific method for the mapping between the finite element units and the BIM model components in S2 is as follows: Each finite element unit corresponds to a unique BIM model component, while a BIM model component corresponds to multiple finite element units. Read the BIM model data. Starting from the first component, first establish an enclosing sphere, and record the sphere center coordinates and radius. Traverse all the finite element units that have not been mapped yet, calculate their distances to the sphere center, and quickly screen out the candidate finite element units by the distance being less than the sphere radius. Perform a fine calculation on the candidate finite element units and the BIM model components. If the BIM model component completely contains the finite element unit, establish a mapping relationship, record the BIM model component code in the finite element unit attributes, and store it in the database. Loop through all the BIM model components to perform the operation until all the finite element units are mapped.

4. A global monitoring method for bridge construction based on real-time finite element calculation according to claim 1, characterized in that, The specific method for setting the warning threshold for each unit of the finite element in S3 is as follows: Obtain the construction materials of each component of the BIM model through the design information, and find the allowable stress of the materials. Use the mapping relationship to find the finite element units corresponding to each BIM model component, set the allowable stress attribute for the finite element units, and store it in the corresponding database fields. Set the warning threshold for each finite element unit. Take values between 65% - 75% of the allowable stress to set the three-level warning threshold, values between 75% - 85% to set the second-level warning threshold, and values between 85% - 95% to set the first-level warning threshold, and store them in the corresponding database fields respectively.

5. A global monitoring method for bridge construction based on real-time finite element calculation according to claim 1, characterized in that The specific process for determining the load variables to be considered during the construction process in S4 is as follows: Determine the environmental loads, including temperature, wind speed, and wind direction, and assign unique ID numbers to them in the monitoring result database respectively. Determine the weight loads, including the magnitude and position of the weight, and assign unique ID numbers to them in the monitoring result database respectively. Configure the corresponding bridge identification code for each load variable for easy real-time query and acquisition during subsequent calculations. Bind the construction site instrument code with the ID number of the corresponding load variable, and use the network interface to regularly transmit the acquisition results to the database.

6. The global monitoring method for bridge construction based on real-time finite element calculation according to claim 5, characterized in that, The process of obtaining the load variables is as follows: On the project site, sensors, cameras, and weighing modules are installed to obtain real-time load parameters during bridge construction, and they are transmitted to the finite element calculation server via wireless communication or the Internet of Things for real-time calculation; the environmental load is obtained by the sensors installed on-site; the weight load is obtained by the weighing module, and combined with the camera to identify the vehicle position, and the magnitude and position of the weight load are analyzed.

7. A global monitoring method for bridge construction based on real-time finite element calculation according to claim 1, characterized in that, In S5, a finite element calculation server is configured, and the specific method for real-time calculation is as follows: On the server, start a new finite element real-time calculation task and input the corresponding bridge identification code; The server imports the finite element model from the database according to the bridge identification code; Based on the current bridge construction stage, determine the finite element units that need to be designed for the current calculation. Compare the construction stage attributes of each unit with the current construction stage. If it is after the current construction stage in terms of time, no calculation will be performed; According to the bridge identification code, read the latest load data from the database, including temperature, wind speed, wind direction, weight magnitude, and weight position; Perform calculations at regular intervals, and set the time interval between 1 second and 3 seconds to ensure the real-time nature of the calculation.

8. A global monitoring method for bridge construction based on real-time finite element calculation according to claim 1, characterized in that The three-level warning mechanism in S7 is as follows: The server calculates the real-time stress of each finite element unit in real-time and compares the real-time stress with the three-level warning value of the corresponding unit; If a warning is triggered, send a warning message to the front-end display module. The content of the message includes: finite element unit code, finite element unit coordinate position, real-time stress value, and warning level; When the front-end receives the message and determines it is a warning, based on the coordinate position, add a warning mark at the corresponding position in the three-dimensional model; Set the three-level warning as a yellow mark to remind the staff to pay attention to the construction situation; Set the second-level warning as an orange mark to remind the staff to take necessary measures to reduce risks; Set the first-level warning as a red mark to remind the staff to urgently suspend construction and eliminate risks.

9. A global monitoring system for bridge construction based on real-time finite element calculation, characterized in that, It includes: A finite element model construction unit, which is used to construct a bridge finite element model, encode each finite element unit to ensure the uniqueness of the encoding, determine the bridge construction stage according to the construction plan, assign corresponding construction stage attributes to each unit according to the construction completion sequence of different parts, and store the constructed finite element model in the database and assign a unique bridge identification code; A finite element and BIM model mapping unit, which is used to construct the three-dimensional spatial geometric correspondence between the finite element model and the BIM model and perform the mapping between the finite element unit and the BIM model component; A unit for determining the stress warning threshold, which is used to determine the allowable stress through the construction materials of the bridge components, and further set the warning threshold for each unit of the finite element; A unit for determining the load variables, which is used to determine the load variables that need to be considered during the construction process; A configuration calculation server and real-time calculation unit, which is used to configure the finite element calculation server and perform real-time calculations; A finite element result display unit, which is used to obtain the finite element calculation results, modify the stress of each component of the three-dimensional BIM model according to the results, and globally display the results; A monitoring and warning unit, which is used to set a three-level warning mechanism and perform monitoring and warning.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program is executed by a processor to perform the global monitoring method for bridge construction based on real-time finite element calculation according to any one of claims 1-8.

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