Single-layer aluminum alloy latticed shell novel modular node bearing capacity evaluation system and method

Abstract

The invention provides a novel modular node bearing capacity evaluation system and method for a single-layer aluminum alloy reticulated shell. The method comprises the following steps: determining a bending moment-corner curve of a target node according to an initial rigidity calibration value of the target node and node load information of the target node in the structural design of the single-layer aluminum alloy reticulated shell; the local yield bearing capacity of each assembly in the target node is determined through the bending moments of the multiple node domains of the target node and the bending moment-corner curve, and then the overall ultimate bearing capacity of the target node is obtained through integration of all the local yield bearing capacities; determining the design bearing capacity of the target node under different load working conditions according to the safe rotation limit value of the target node core area and the bending moment-rotation angle curve; and carrying out fusion evaluation on the bearing capacity of a target node in the novel modular nodes in the single-layer aluminum alloy latticed shell according to the overall ultimate bearing capacity and all the designed bearing capacities. Based on the scheme, multi-scale bearing capacity evaluation of the novel modular joint of the single-layer aluminum alloy latticed shell from assembly yield to overall failure can be realized.

Description

Technical Field

[0001] This application relates to the field of load-bearing capacity assessment technology, and more specifically, to a novel modular node load-bearing capacity assessment system and method for single-layer aluminum alloy reticulated shells. Background Technology

[0002] A single-layer aluminum alloy grid shell is a large-span spatial structure system. It consists of aluminum alloy members connected at nodes to form a curved grid, serving both load-bearing and enclosure functions. This structural system uses aluminum alloy as the primary material, fully leveraging its excellent properties of being lightweight, high-strength, corrosion-resistant, and easily formable, achieving a unity between aesthetically pleasing architectural form and efficient structural load-bearing.

[0003] In the design of single-layer reticulated shell structures, traditional methods idealize nodes as either completely rigid or ideally hinged extreme mechanical models. The rigidity assumption ignores the actual deformation capacity of the nodes and fails to reflect the gradual yielding process and stress development of the core components under bending moment. The hinge assumption completely ignores the bending moment transmission capacity of the nodes, leading to a significant discrepancy between the structural analysis model and actual conditions. Neither approach can accurately describe the complete failure path of the nodes under load, from the elastic stage to the successive yielding of components, the redistribution of internal forces, and finally the formation of plastic hinges or overall failure. This lack of mechanistic understanding directly makes it difficult to accurately quantify the safety margin of nodes under actual working conditions. It also restricts the optimization space of node construction, often forcing designs to adopt overly conservative construction schemes, resulting in material waste or underestimating the actual stress state of the nodes, thus creating potential safety hazards. Therefore, how to achieve multi-scale load-bearing capacity assessment of novel modular nodes in single-layer aluminum alloy reticulated shells from component yielding to overall failure has become a challenge for the industry. Summary of the Invention

[0004] This application provides a novel modular node bearing capacity assessment system and method for single-layer aluminum alloy reticulated shells, which can realize multi-scale bearing capacity assessment of novel modular nodes of single-layer aluminum alloy reticulated shells from component yielding to overall failure.

[0005] In a first aspect, this application provides a novel modular node load-bearing capacity assessment method for single-layer aluminum alloy reticulated shells, including: A smart sensor network is deployed on the target node in the modular node prototype test. The smart sensor network is used to monitor the load and deformation data of the target node in the modular node prototype test to obtain the node load information and rotational deformation information of the target node. The initial stiffness calibration value of the target node in the design of the single-layer aluminum alloy reticulated shell structure is obtained. The initial stiffness calibration value and the node load information are used to calibrate and verify the node force of the target node, and the bending moment-rotation curve of the target node is obtained. Multiple nodal domain bending moments of the target node are extracted from the rotational deformation information. The local yield bearing capacity of each component in the target node is determined by all nodal domain bending moments and the bending moment-rotation curve. The overall ultimate bearing capacity of the target node is then obtained by integrating all local yield bearing capacities. Determine the safe rotation limit of the core area of ​​the target node, and determine the design bearing capacity of the target node under different load conditions using the safe rotation limit and the bending moment-rotation curve; The load-bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell is evaluated by combining the overall ultimate load-bearing capacity and all design load-bearing capacities.

[0006] In some embodiments, the nodal force of the target node is calibrated and verified using the initial stiffness calibration value and the nodal load information to obtain the moment-rotation curve of the target node, specifically including: The bending moment value in the nodal load information and the rotation angle value in the rotational deformation information are time-aligned to obtain multiple bending moment-rotation angle scatter points. Construct the initial moment-rotation curve of the target node using all moment-rotation scatter points; The initial stiffness calibration value is used to verify the initial moment-rotation curve to obtain the moment-rotation curve of the target node.

[0007] In some embodiments, extracting multiple nodal domain bending moments of the target node from the rotational deformation information specifically includes: Obtain multiple node domains of the target node, and then determine the boundary sections of each node domain; For each node domain, the angle values ​​on both sides of the boundary section of the node domain are obtained from the rotation deformation information, and then the relative rotation angle of the boundary section of the node domain is determined. The nodal domain bending moment of each nodal domain is determined by the relative rotation angle and the bending stiffness of the nodal domain, thereby obtaining the nodal domain bending moment of each nodal domain.

[0008] In some embodiments, determining the local yield capacity of each component in the target node using all nodal domain bending moments and the moment-rotation curve specifically includes: For each component in the target node, obtain the node domain bending moment of the node domain where the component is located; The nominal yield strength of the material used in the component is obtained from the moment-rotation curve; The local yield bearing capacity of the component is determined by the nominal yield strength and the nodal domain bending moment, thereby obtaining the local yield bearing capacity of each component in the target node.

[0009] In some embodiments, the overall ultimate bearing capacity of the target node obtained by integrating all local yield bearing capacities specifically includes: Get the yield order of components in the target node; The internal force redistribution of the target node is simulated using the yield sequence of the components and all local yield bearing capacities to obtain the overall ultimate bearing capacity of the target node.

[0010] In some embodiments, determining the design bearing capacity of the target node under different load conditions using the safe rotation limit and the moment-rotation curve specifically includes: The reference design bearing capacity of the target node is obtained from the moment-rotation curve using the safe rotation limit; Determine the adjustment coefficients for the bearing capacity of the target node under different load conditions; The design bearing capacity of the target node under different load conditions is determined based on the various adjustment coefficients and the aforementioned benchmark design bearing capacity.

[0011] In some embodiments, the smart sensor network includes smart strain sensors, tilt sensors, and displacement sensors.

[0012] Secondly, this application provides a novel modular node load-bearing capacity assessment system for single-layer aluminum alloy reticulated shells, comprising: The monitoring module is used to deploy an intelligent sensor network on the target node in the modular node prototype test, and to use the intelligent sensor network to monitor the load and deformation data of the target node in the modular node prototype test, so as to obtain the node load information and rotational deformation information of the target node. The processing module is used to obtain the initial stiffness calibration value of the target node in the design of the single-layer aluminum alloy reticulated shell structure, and to use the initial stiffness calibration value and the node load information to calibrate and verify the node force of the target node, thereby obtaining the bending moment-rotation curve of the target node. The processing module is also used to extract multiple nodal domain bending moments of the target node from the rotational deformation information, determine the local yield bearing capacity of each component in the target node through all nodal domain bending moments and the bending moment-rotation curve, and then obtain the overall ultimate bearing capacity of the target node by integrating all local yield bearing capacities. The processing module is also used to determine the safe rotation limit of the core area of ​​the target node, and to determine the design bearing capacity of the target node under different load conditions by means of the safe rotation limit and the bending moment-rotation curve; An execution module is used to perform a fusion evaluation of the bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell based on the overall ultimate bearing capacity and all design bearing capacities.

[0013] Thirdly, this application provides a computer device, which includes a memory and a processor. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the above-described method for evaluating the load-bearing capacity of a novel modular node in a single-layer aluminum alloy mesh shell.

[0014] Fourthly, this application provides a computer-readable storage medium storing instructions or code that, when executed on a computer, cause the computer to implement the aforementioned novel modular node load-bearing capacity assessment method for single-layer aluminum alloy mesh shells.

[0015] The technical solutions provided by the embodiments disclosed in this application have the following beneficial effects: This application provides a novel modular node load-bearing capacity assessment system and method for single-layer aluminum alloy reticulated shells. A smart sensor network is deployed on the target node in a modular node prototype test. This smart sensor network monitors the load and deformation data of the target node in the prototype test, obtaining the node load information and rotational deformation information of the target node. The initial stiffness calibration value of the target node in the single-layer aluminum alloy reticulated shell structural design is obtained. The initial stiffness calibration value and the node load information are used to calibrate and verify the node force of the target node, obtaining the bending moment-rotation curve of the target node. From the... Multiple nodal domain bending moments of the target node are extracted from the rotational deformation information. The local yield bearing capacity of each component in the target node is determined by all nodal domain bending moments and the bending moment-rotation curve. The overall ultimate bearing capacity of the target node is obtained by integrating all local yield bearing capacities. The safe rotation limit of the core area of ​​the target node is determined. The design bearing capacity of the target node under different load conditions is determined by the safe rotation limit and the bending moment-rotation curve. The bearing capacity of the target node in the novel modular node in the single-layer aluminum alloy reticulated shell is evaluated by integrating the overall ultimate bearing capacity and all design bearing capacities.

[0016] Therefore, in this application, the load-bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell is evaluated by integrating the overall ultimate bearing capacity and all design bearing capacities. First, the process of determining the overall ultimate bearing capacity constructs a complete failure path from microscopic material yielding to macroscopic structural failure. It reveals the complete process of the target node from elastic operation to elastoplastic development and finally to loss of load-bearing capacity, transforming the originally black-box node failure mode into a quantifiable and traceable mechanical process. This not only provides accurate data for evaluating the final safety reserve of the node, but more importantly, it provides a mechanistic basis for optimizing the node construction form, improving the internal force transmission path, and avoiding unexpected brittle failure, realizing cross-scale failure mechanism tracking from component to system. Then, the process of determining the design bearing capacity establishes a structural design control standard based on normal service performance. By introducing a safe rotation limit, the stiffness control requirements of the node are transformed into specific bearing capacity indicators. The safe rotation limit defines the maximum allowable deformation state of the node under the premise of ensuring the building's use function, maintaining the structural integrity, and avoiding non-structural damage. The design bearing capacity determined by the intersection of the safe rotation limit and the moment-rotation curve represents the maximum load that the node can bear when meeting all normal use requirements. This elevates the traditional single-strength design to a dual control system that emphasizes both stiffness and strength, enabling designers to clearly distinguish the performance boundaries of the node in normal use and ultimate states. This avoids material waste caused by excessive pursuit of stiffness and prevents functional defects caused by neglecting deformation control, achieving synergistic optimization of structural safety and usability. In summary, based on the above scheme, multi-scale bearing capacity assessment of the novel modular node of single-layer aluminum alloy reticulated shell can be achieved from component yielding to overall failure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exemplary flowchart of a novel modular node load-bearing capacity assessment method for single-layer aluminum alloy reticulated shells according to some embodiments of this application; Figure 2 This is a flowchart illustrating the process of determining the design bearing capacity according to some embodiments of this application; Figure 3 This is a structural schematic diagram of a novel modular node load-bearing capacity assessment system for single-layer aluminum alloy reticulated shells, as shown in some embodiments of this application. Figure 4This is a structural schematic diagram of a computer device for implementing a novel modular node load-bearing capacity assessment method for single-layer aluminum alloy mesh shells, according to some embodiments of this application. Detailed Implementation

[0019] To better understand the technical solution of this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] refer to Figure 1 The figure is an exemplary flowchart of a novel modular node bearing capacity assessment method for single-layer aluminum alloy reticulated shells according to some embodiments of this application. The novel modular node bearing capacity assessment method for single-layer aluminum alloy reticulated shells mainly includes the following steps: In step 101, a smart sensor network is deployed on the target node in the modular node prototype test. The smart sensor network is used to monitor the load and deformation data of the target node in the modular node prototype test to obtain the node load information and rotational deformation information of the target node.

[0021] It should be noted that, in this application, rotational deformation information is a set of deformation time histories describing the relative rotation between the core area of ​​the node and its components; node load information is a set of load time histories acting on the node; the intelligent sensor network includes intelligent strain sensors, tilt sensors, and displacement sensors; the modular node prototype test is a physical experiment conducted in a controlled laboratory environment to fabricate node specimens according to the materials, geometric dimensions, and connection methods in actual engineering, and to apply loads simulating real working conditions to study their mechanical properties; the target node is a novel modular node in a single-layer aluminum alloy reticulated shell structure that needs to be evaluated for its load-bearing capacity, and the target node is the direct object of this test and evaluation.

[0022] In practice, firstly, based on the geometric structure and stress characteristics of the target node, the measurement points of the intelligent sensor network are planned. Load sensors are installed between the loading device and the force transmission path of the node to directly measure the load. Simultaneously, displacement sensors are erected on a stable reference frame and aligned with the measurement target points on the node. Tilt sensors are directly fixed to the surface of the node component whose rotation angle needs to be measured. In the modular node prototype test, the loading device is activated to apply load to the target node according to the predetermined scheme, and all intelligent sensors are triggered simultaneously to continuously record load and deformation data at a sampling frequency of once per second. The collected raw data is transmitted to the data processing unit. By subtracting the initial zero-point reading, applying the sensor calibration coefficient for unit conversion, and synthesizing the data according to the measurement model (e.g., calculating the relative rotation angle through the displacement difference of different points), the set of processed load data expressed in standard mechanical units is used as the node load information of the target node, and the set of processed data of the node core area and the relative rotation between components expressed in standard geometric units is used as the rotation deformation information of the target node.

[0023] In step 102, the initial stiffness calibration value of the target node in the single-layer aluminum alloy reticulated shell structure design is obtained. The initial stiffness calibration value and the node load information are used to calibrate and verify the node force of the target node, and the bending moment-rotation curve of the target node is obtained.

[0024] It should be noted that, in this application, the initial stiffness calibration value is a physical quantity characterizing the target node's ability to resist rotational deformation during the elastic stress stage. In specific implementation, based on the final geometric dimensions, material properties, and connection structure of the node determined by the single-layer aluminum alloy reticulated shell structure design, a refined three-dimensional solid model of the target node is established in the finite element analysis software. The three-dimensional solid model is then given the constitutive relationship of the aluminum alloy material with real elastic-plastic properties, while accurately simulating bolt connection and contact behavior. Boundary constraints consistent with the subsequent prototype test scheme are applied to the three-dimensional solid model, and a pure bending moment load that increases in stages from zero is applied in the force direction of the target node. The bending moment-rotation angle data of the node core area in the finite element analysis results are extracted, and the slope of its initial linear segment is identified and calculated. This slope value is then used as the initial stiffness calibration value of the target node.

[0025] In some embodiments, the nodal forces of the target node are calibrated and verified using the initial stiffness calibration value and the nodal load information to obtain the moment-rotation curve of the target node, which can be achieved by the following steps: The bending moment value in the nodal load information and the rotation angle value in the rotational deformation information are time-aligned to obtain multiple bending moment-rotation angle scatter points. Construct the initial moment-rotation curve of the target node using all moment-rotation scatter points; The initial stiffness calibration value is used to verify the initial moment-rotation curve to obtain the moment-rotation curve of the target node.

[0026] It should be noted that in this application, the moment-rotation curve is the final moment-rotation relationship curve characterizing the true mechanical performance of the target node; the moment-rotation scatter plot is the data point representing the relationship between instantaneous load and deformation; and the moment-rotation initial curve is the original relationship curve reflecting the entire process of the target node under stress and deformation.

[0027] In specific implementation, firstly, the bending moment values ​​in the nodal load information and the rotation angle values ​​in the rotational deformation information are time-aligned to obtain multiple bending moment-rotation angle scatter points. This can be achieved in the data processing unit by pairing the bending moment value at each sampling time in the nodal load information with the rotation angle value at the same sampling time in the rotational deformation information, thereby obtaining multiple bending moment-rotation angle scatter points. Then, the initial bending moment-rotation angle curve of the target node can be constructed using all the bending moment-rotation angle scatter points. This can be achieved by plotting all the bending moment-rotation angle scatter points in a rectangular coordinate system with the bending moment value on the vertical axis and the rotation angle value on the horizontal axis, and using piecewise linear connection or least squares. The method is used to fit and construct the initial moment-rotation curve of the target node. Finally, the initial moment-rotation curve is verified using the initial stiffness calibration value. The moment-rotation curve of the target node can be obtained by the following method: calculate the average slope of the linearly rising segment (i.e., the curve segment with a positive slope) of the initial moment-rotation curve near the origin, compare it with the pre-acquired initial stiffness calibration value, and if the relative error between the two is within the allowable range (e.g., 10%), the initial curve is determined to be valid. If the error exceeds the limit, the sensor data or fitting process is checked and corrected, so that the initial moment-rotation curve confirmed by this verification procedure is used as the moment-rotation curve of the target node.

[0028] In step 103, multiple nodal domain bending moments of the target node are extracted from the rotational deformation information. The local yield bearing capacity of each component in the target node is determined by all nodal domain bending moments and the bending moment-rotation curve. Then, the overall ultimate bearing capacity of the target node is obtained by integrating all local yield bearing capacities.

[0029] In some embodiments, extracting multiple nodal domain bending moments of the target node from the rotational deformation information can be achieved using the following steps: Obtain multiple node domains of the target node, and then determine the boundary sections of each node domain; For each node domain, the angle values ​​on both sides of the boundary section of the node domain are obtained from the rotation deformation information, and then the relative rotation angle of the boundary section of the node domain is determined. The nodal domain bending moment of each nodal domain is determined by the relative rotation angle and the bending stiffness of the nodal domain, thereby obtaining the nodal domain bending moment of each nodal domain.

[0030] It should be noted that, in this application, the nodal domain bending moment is the bending moment value acting on the boundary section of each nodal domain; the nodal domain is the force-bearing area in the target node enclosed by the connecting plate, stiffening rib and some members, which can be used as an independent element for mechanical analysis; the boundary section is an imaginary section used to isolate the nodal domain from adjacent members or other parts of the node; the relative rotation angle is the difference in the angle change on both sides when the boundary section of the nodal domain rotates relative to each other.

[0031] In specific implementation, firstly, multiple node domains of the target node are obtained, and then the boundary sections of each node domain are determined. This can be achieved in the following way: Based on the design drawings and force transmission paths of the target node, different stress areas with the connecting plate as the core are identified in the node model of the single-layer aluminum alloy mesh shell. These stress areas are then identified as node domains, thus obtaining multiple node domains of the target node. Then, the boundary sections separating the node domains from the connected members are located through mechanical judgment, thus obtaining the boundary sections of each node domain. Next, for each node domain, the angle values ​​on both sides of the boundary section of the node domain are obtained from the rotational deformation information, and the relative rotation angle of the boundary section of the node domain is determined using the following method. The method is as follows: For each node domain, the angle values ​​recorded by tilt sensors pre-installed on both sides of the boundary section of the node domain are extracted from the rotational deformation information, and the average value of the difference between the angle values ​​on both sides at the same moment is taken as the relative rotation angle of the boundary section of the node domain. Finally, the node domain bending moment of the node domain is determined by the relative rotation angle and the bending stiffness of the node domain. The node domain bending moment of each node domain can be obtained by multiplying the relative rotation angle by the bending stiffness of the boundary section pre-calculated through material properties and geometric dimensions, and taking the result of the multiplication as the node domain bending moment on the boundary section of the node domain. The node domain bending moment of each node domain can be obtained by the above method.

[0032] In some embodiments, determining the local yield capacity of each component in the target node using all nodal domain moments and the moment-rotation curve can be achieved through the following steps: For each component in the target node, obtain the node domain bending moment of the node domain where the component is located; The nominal yield strength of the material used in the component is obtained from the moment-rotation curve; The local yield bearing capacity of the component is determined by the nominal yield strength and the nodal domain bending moment, thereby obtaining the local yield bearing capacity of each component in the target node.

[0033] It should be noted that, in this application, the local yield bearing capacity is the bending moment value on the boundary section of the node domain when the stress of the component in the target node reaches the nominal yield strength of the material under the bending moment of the node domain; the node domain bending moment is the bending moment value acting on the boundary section of the specified node domain; and the nominal yield strength is the indicative strength index of the material entering the yield stage.

[0034] In specific implementation, firstly, for each component in the target node, the node domain bending moment of the node domain where the component is located can be obtained in the following way: for each component in the target node, based on the stress area to which the component belongs, associate and obtain the node domain bending moment of the node domain where the component is located; then, the nominal yield strength of the material used in the component can be obtained from the bending moment-rotation curve in the following way: query and obtain the nominal yield strength of the aluminum alloy material used in the component from the material performance report corresponding to the bending moment-rotation curve; finally, the local yield bearing capacity of the component can be determined by the nominal yield strength and the node domain bending moment, and the local yield bearing capacity of each component in the target node can be obtained in the following way: by substituting the nominal yield strength into the bending stress calculation formula that includes the geometric characteristics of the component section, the bending moment value corresponding to the maximum stress at the edge of the component section reaching the nominal yield strength can be calculated, and this bending moment value can be used as the local yield bearing capacity of the component. The local yield bearing capacity of each component in the target node can be obtained in the above way.

[0035] In some embodiments, the overall ultimate bearing capacity of the target node can be obtained by integrating all local yield bearing capacities using the following steps: Get the yield order of components in the target node; The internal force redistribution of the target node is simulated using the yield sequence of the components and all local yield bearing capacities to obtain the overall ultimate bearing capacity of the target node.

[0036] It should be noted that, in this application, the overall ultimate bearing capacity is the maximum load value that the target node can withstand after undergoing the internal force redistribution process. In specific implementation, firstly, the yielding order of the components in the target node can be obtained in the following way: compare the local yield bearing capacity values ​​of all components in the target node, arrange them in ascending order of value, and take the arranged component order as the component yielding order in the target node. This component yielding order indicates the order of load magnitude in which each component in the target node reaches the material yield state according to its own local yield bearing capacity during the load increase process. Then, the internal force redistribution simulation of the target node is performed using the component yielding order and all local yield bearing capacities to obtain the overall ultimate bearing capacity of the target node. This can be achieved in the following way: guided by the component yielding order, in the mechanical calculation model of the node, the mechanical model of the component that has reached its local yield bearing capacity is modified to an ideal elastic-plastic model in turn, and the load is gradually increased. The calculation is iterated until the node as a whole can no longer bear the load due to the formation of a plastic hinge mechanism. Thus, the maximum load value of the node finally calculated through this internal force redistribution simulation process is taken as the overall ultimate bearing capacity of the target node.

[0037] In step 104, the safe rotation limit of the core area of ​​the target node is determined, and the design bearing capacity of the target node under different load conditions is determined by the safe rotation limit and the bending moment-rotation curve.

[0038] It should be noted that, in this application, the safe rotation limit is the maximum permissible rotation angle to ensure normal use and safety reserve of the structure. In specific implementation, the provisions on node deformation limits in the current aluminum alloy structure design code are consulted. If the code does not provide direct provisions, the relevant limits for similar steel structure nodes are referenced. At the same time, the sensitivity to deformation is determined by combining the specific functional requirements of the single-layer reticulated shell structure in which the node is located. Combining the above code requirements and functional requirements, a control value that ensures the safety and normal use of the structure is selected, and this control value is used as the safe rotation limit of the core area of ​​the target node.

[0039] In some embodiments, the design bearing capacity of the target node under different load conditions is determined by the safe rotation limit and the moment-rotation curve, with reference to... Figure 2 The figure is a schematic diagram of the process for determining the design bearing capacity in some embodiments of this application. In this embodiment, the design bearing capacity can be determined by the following steps: In step 1041, the reference design bearing capacity of the target node is obtained from the moment-rotation curve using the safe rotation limit; In step 1042, the adjustment coefficients for the bearing capacity of the target node under different load conditions are determined; In step 1043, the design bearing capacity of the target node under different load conditions is determined based on the various adjustment coefficients and the reference design bearing capacity.

[0040] It should be noted that in this application, the design bearing capacity is the final bearing capacity value used for node strength verification under different working conditions; the benchmark design bearing capacity is the benchmark bearing capacity for the target node to meet the ultimate state service requirements; and the adjustment coefficient is the coefficient for amplifying or reducing the benchmark design bearing capacity under different load conditions.

[0041] In specific implementation, firstly, obtaining the benchmark design bearing capacity of the target node from the moment-rotation curve using the safe rotation limit can be achieved as follows: using the safe rotation limit as the abscissa value, find the corresponding ordinate moment value on the moment-rotation curve, and then use this ordinate moment value as the benchmark design bearing capacity of the target node. Secondly, determining the adjustment coefficients for the bearing capacity of the target node under different load conditions can be achieved as follows: based on the current national building structure load code and seismic design code, find the partial factors and combinations corresponding to dead load, live load, wind load, and seismic action, respectively. The average of the partial factor, combined factor, and structural importance factor is calculated using the value factor and structural importance factor as the adjustment factor for the bearing capacity of the target node under the corresponding load condition. This yields the adjustment factor for the bearing capacity of the target node under different load conditions. Finally, the design bearing capacity of the target node under different load conditions can be determined based on the adjustment factor and the reference design bearing capacity. This can be achieved by multiplying the adjustment factor for different load conditions by the reference design bearing capacity as the design bearing capacity of the target node under the corresponding load condition.

[0042] In step 105, the bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell is evaluated by combining the overall ultimate bearing capacity and all design bearing capacities.

[0043] In some embodiments, the fusion evaluation of the bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell based on the overall ultimate bearing capacity and all design bearing capacities can be achieved in the following manner: Calculate the ratio of the overall ultimate bearing capacity to the design bearing capacity under the current load condition as the comprehensive safety factor of the target node; compare this comprehensive safety factor with the target safety factor; if the target is not met, select key design parameters (e.g., increase the node plate thickness or adjust the number of bolts) for modification based on the sensitivity analysis results of the influence of design parameters on node stiffness and strength; use the modified design parameters to re-execute the entire process from initial stiffness calibration to bearing capacity calculation, and recalculate the comprehensive safety factor for comparison. Through repeated iterative adjustments, until the comprehensive safety factor of the node meets the target requirements and all design bearing capacities pass the verification, the final determined combination of design parameters is used as the optimized design scheme of the novel modular node.

[0044] In another aspect, in some embodiments, this application provides a novel modular node load-bearing capacity assessment system for single-layer aluminum alloy reticulated shells, with reference to... Figure 3 The figure is a structural schematic diagram of a novel modular node bearing capacity assessment system for single-layer aluminum alloy reticulated shells according to some embodiments of this application. This system includes a monitoring module 201, a processing module 202, and an execution module 203, which are described below: The monitoring module 201 in this application is mainly used to deploy an intelligent sensor network on the target node in the modular node prototype test, and use the intelligent sensor network to monitor the load and deformation data of the target node in the modular node prototype test, so as to obtain the node load information and rotation deformation information of the target node. Processing module 202, in this application, is used to obtain the initial stiffness calibration value of the target node in the design of a single-layer aluminum alloy reticulated shell structure, and to use the initial stiffness calibration value and the node load information to calibrate and verify the node force of the target node, thereby obtaining the bending moment-rotation curve of the target node; It should be noted that the processing module 202 is also used to extract multiple nodal domain bending moments of the target node from the rotational deformation information, determine the local yield bearing capacity of each component in the target node through all nodal domain bending moments and the bending moment-rotation curve, and then obtain the overall ultimate bearing capacity of the target node by integrating all local yield bearing capacities. In addition, the processing module 202 is also used to determine the safe rotation limit of the core area of ​​the target node, and to determine the design bearing capacity of the target node under different load conditions through the safe rotation limit and the bending moment-rotation curve; The execution module 203 in this application is mainly used to perform a fusion evaluation of the bearing capacity of the target node in the novel modular node in the single-layer aluminum alloy reticulated shell based on the overall ultimate bearing capacity and all design bearing capacities.

[0045] The foregoing detailed examples of a novel modular node load-bearing capacity assessment system and method for single-layer aluminum alloy reticulated shells provided in this application. It is understood that the corresponding apparatus, in order to achieve the above functions, includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0046] In some embodiments, this application also provides a computer device, the computer device including a memory and a processor, the memory for storing a computer program, and the processor for calling and running the computer program from the memory, so that the computer device executes the above-described method for evaluating the load-bearing capacity of a novel modular node in a single-layer aluminum alloy mesh shell.

[0047] In some embodiments, reference Figure 4 The dashed lines in the figure indicate that the unit or module is optional. This figure is a structural schematic diagram of a computer device for implementing a novel modular node load-bearing capacity assessment method for single-layer aluminum alloy reticulated shells according to an embodiment of this application. The novel modular node load-bearing capacity assessment method for single-layer aluminum alloy reticulated shells described in the above embodiments can be achieved through… Figure 4 The computer device shown is used to implement this, and the computer device includes at least one processor 301, a memory 302 and at least one communication unit 305. The computer device may be a terminal device, a server or a chip.

[0048] Processor 301 can be a general-purpose processor or a special-purpose processor. For example, processor 301 can be a central processing unit (CPU), which can be used to control computer devices, execute software programs, and process data from software programs. The computer device may also include a communication unit 305 for inputting (receiving) and outputting (transmitting) signals.

[0049] For example, the computer device may be a chip, and the communication unit 305 may be the input and / or output circuit of the chip, or the communication unit 305 may be the communication interface of the chip, which may be a component of a terminal device, network device or other device.

[0050] For example, the computer device may be a terminal device or a server, and the communication unit 305 may be a transceiver of the terminal device or the server, or the communication unit 305 may be a transceiver circuit of the terminal device or the server.

[0051] The computer device may include one or more memories 302 storing a program 304. The program 304 can be executed by a processor 301 to generate instructions 303, causing the processor 301 to execute the method described in the above method embodiments according to the instructions 303. Optionally, the memory 302 may also store data (such as a target audit model). Optionally, the processor 301 may also read data stored in the memory 302, which may be stored at the same storage address as the program 304, or it may be stored at a different storage address than the program 304.

[0052] The processor 301 and memory 302 can be configured separately or integrated together, for example, integrated on the system on chip (SOC) of the terminal device.

[0053] It should be understood that each step of the above method embodiment can be completed by hardware logic circuits or software instructions in the processor 301. The processor 301 can be a CPU, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, such as discrete gates, transistor logic devices, or discrete hardware components.

[0054] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0055] For example, in some embodiments, this application also provides a computer-readable storage medium storing instructions or code that, when executed on a computer, cause the computer to implement the above-described method for evaluating the load-bearing capacity of a novel modular node in a single-layer aluminum alloy mesh shell.

[0056] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0057] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A novel modular node load-bearing capacity assessment method for single-layer aluminum alloy reticulated shells, characterized in that, Includes the following steps: A smart sensor network is deployed on the target node in the modular node prototype test. The smart sensor network is used to monitor the load and deformation data of the target node in the modular node prototype test to obtain the node load information and rotational deformation information of the target node. The initial stiffness calibration value of the target node in the design of the single-layer aluminum alloy reticulated shell structure is obtained. The initial stiffness calibration value and the node load information are used to calibrate and verify the node force of the target node, and the bending moment-rotation curve of the target node is obtained. Multiple nodal domain bending moments of the target node are extracted from the rotational deformation information. The local yield bearing capacity of each component in the target node is determined by all nodal domain bending moments and the bending moment-rotation curve. The overall ultimate bearing capacity of the target node is then obtained by integrating all local yield bearing capacities. Determine the safe rotation limit of the core area of ​​the target node, and determine the design bearing capacity of the target node under different load conditions using the safe rotation limit and the bending moment-rotation curve; The bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell is evaluated by combining the overall ultimate bearing capacity and all design bearing capacities.

2. The method as described in claim 1, characterized in that, The initial stiffness calibration value and the nodal load information are used to calibrate and verify the nodal force of the target node, and the bending moment-rotation curve of the target node is obtained, specifically including: By aligning the bending moment value in the nodal load information and the rotation angle value in the rotational deformation information over time, multiple bending moment-rotation angle scatter points are obtained. Construct the initial moment-rotation curve of the target node using all moment-rotation scatter points; The initial stiffness calibration value is used to verify the initial moment-rotation curve to obtain the moment-rotation curve of the target node.

3. The method as described in claim 1, characterized in that, Extracting multiple nodal domain bending moments of the target node from the rotational deformation information specifically includes: Obtain multiple node domains of the target node, and then determine the boundary sections of each node domain; For each node domain, the angle values ​​on both sides of the boundary section of the node domain are obtained from the rotation deformation information, and then the relative rotation angle of the boundary section of the node domain is determined. The nodal domain bending moment of each nodal domain is determined by the relative rotation angle and the bending stiffness of the nodal domain, thereby obtaining the nodal domain bending moment of each nodal domain.

4. The method as described in claim 1, characterized in that, Determining the local yield capacity of each component in the target node by using all nodal domain bending moments and the bending moment-rotation curve specifically includes: For each component in the target node, obtain the node domain bending moment of the node domain where the component is located; The nominal yield strength of the material used in the component is obtained from the moment-rotation curve; The local yield bearing capacity of the component is determined by the nominal yield strength and the nodal domain bending moment, thereby obtaining the local yield bearing capacity of each component in the target node.

5. The method as described in claim 1, characterized in that, The overall ultimate bearing capacity of the target node, obtained by integrating all local yield bearing capacities, specifically includes: Get the yield order of components in the target node; The internal force redistribution of the target node is simulated using the yield sequence of the components and all local yield bearing capacities to obtain the overall ultimate bearing capacity of the target node.

6. The method as described in claim 1, characterized in that, Determining the design bearing capacity of the target node under different load conditions using the aforementioned safe rotation limit and the bending moment-rotation curve specifically includes: The reference design bearing capacity of the target node is obtained from the moment-rotation curve using the safe rotation limit; Determine the adjustment coefficients for the bearing capacity of the target node under different load conditions; The design bearing capacity of the target node under different load conditions is determined based on the various adjustment coefficients and the aforementioned benchmark design bearing capacity.

7. The method as described in claim 1, characterized in that, The intelligent sensor network includes intelligent strain sensors, tilt sensors, and displacement sensors.

8. A novel modular node load-bearing capacity assessment system for single-layer aluminum alloy reticulated shells, characterized in that, include: The monitoring module is used to deploy an intelligent sensor network on the target node in the modular node prototype test, and to use the intelligent sensor network to monitor the load and deformation data of the target node in the modular node prototype test, so as to obtain the node load information and rotational deformation information of the target node. The processing module is used to obtain the initial stiffness calibration value of the target node in the design of the single-layer aluminum alloy reticulated shell structure, and to use the initial stiffness calibration value and the node load information to calibrate and verify the node force of the target node, thereby obtaining the bending moment-rotation curve of the target node. The processing module is also used to extract multiple nodal domain bending moments of the target node from the rotational deformation information, determine the local yield bearing capacity of each component in the target node through all nodal domain bending moments and the bending moment-rotation curve, and then obtain the overall ultimate bearing capacity of the target node by integrating all local yield bearing capacities. The processing module is also used to determine the safe rotation limit of the core area of ​​the target node, and to determine the design bearing capacity of the target node under different load conditions by means of the safe rotation limit and the bending moment-rotation curve; An execution module is used to perform a fusion evaluation of the bearing capacity of the target node in the novel modular node of the single-layer aluminum alloy reticulated shell based on the overall ultimate bearing capacity and all design bearing capacities.

9. A computer device, characterized in that, The computer device includes a memory and a processor. The memory is used to store computer programs, and the processor is used to call and run the computer programs from the memory, so that the computer device executes the novel modular node load-bearing capacity assessment method for single-layer aluminum alloy mesh shells as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions or code that, when executed on a computer, cause the computer to implement the novel modular node load-bearing capacity assessment method for single-layer aluminum alloy mesh shells as described in any one of claims 1 to 7.

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