An intelligent analysis method for the pre-adjustment value of assembling a super-large truss structure

Abstract

The present invention discloses an intelligent analysis method for the assembly pre-adjustment value of an ultra-large truss structure, belonging to the technical field of intelligent calculation of building structures, and comprising the following steps: establishing a basic model in the design stage and extracting key data of the basic model in the design stage; classifying and calibrating node information and element information in the key data of the basic model in the design stage; setting connection node information and connection element information in the hoisting stage, chord connection stage, hook release stage, and connection stage of the inclined web members at the support position in the construction stage, and establishing a basic model in the construction stage; extracting key data of the basic model in the construction stage from the information data of the basic model in the construction stage and integrating other data to generate all information data of the basic model in the construction stage; calculating and analyzing all information data of the basic model in the construction stage to obtain a calculation result; extracting node deformation data of the basic model in the construction stage for calculating the assembly pre-adjustment value, and calculating the assembly pre-adjustment value.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent calculation of building structures, and particularly relates to an intelligent analysis method for the pre-adjustment value of the assembly of a super-large truss structure. Background Technique

[0002] To meet the requirements of large spaces and large loads in venue or factory buildings, the building structure form usually uses a super-large truss structure. The construction quality control of the super-large truss structure is one of the key factors for project completion. Among them, pre-deformation is a key task in controlling the completion degree of the steel structure. Pre-deformation refers to the initial deformation setting carried out in advance so that the structure or component after construction reaches the control target of the designed geometric positioning. For a super-large truss structure, a single truss structure generally consists of multiple spans, and each span of the truss structure has a large self-weight. Usually, after being hoisted and lifted in place, it is connected to the components at the support. Due to the large self-weight of the truss structure itself, additional deformation will occur during the installation process due to the change of boundary conditions. To ensure that the elevation configuration of the structure at completion meets the building requirements, pre-deformation needs to be applied during the structural processing or assembly stage to offset or reduce the additional deformation during the construction stage. The construction process is a time-varying process. To calculate the additional deformation during construction, it is necessary to establish multiple basic models with different compositions and different boundary conditions according to factors such as hoisting segments and installation sequences, and extract the analysis results of each model respectively to calculate the pre-adjustment value. The establishment of multiple models, on the one hand, requires a large amount of work, and there is a possibility of deviation in the establishment process and data analysis. On the other hand, when key conditions such as hoisting segments are adjusted and changed, it is necessary to re-establish the model and perform the data analysis process, which is relatively cumbersome.

[0003] Therefore, based on the basic model data, this method generates model parameters through node and element classification calibration, determines the composition logic of each model by inputting parameter values, automatically generates the basic models of each stage by the program, and performs calculation and result processing to realize the intelligent analysis of the pre-adjustment value of the assembly during the construction process of the super-large truss structure. The method can improve the analysis efficiency and accuracy. Further, by increasing the visualization of the model during the process, it can assist in ensuring the correctness of the input of model parameters. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an intelligent analysis method for the pre-adjustment value of the assembly of a super-large truss structure. Based on the key data of the basic model in the design stage, by classifying and calibrating nodes and elements, the connection node information and connection element information in the hoisting stage, chord connection stage, hook release stage, and inclined web member connection stage at the support position during the construction stage are set to determine the composition logic of the basic models of each construction stage. The program automatically generates the basic models of each stage during the construction stage, and performs calculation and result processing to realize the intelligent analysis of the pre-adjustment value of the assembly during the construction process of the super-large truss structure.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides an intelligent analysis method for the pre-adjustment value of assembling a super-large truss structure, comprising the following steps:

[0007] A1: Establish a basic model in the design stage, and extract the key data of the basic model in the design stage from the information data of the basic model in the design stage;

[0008] A2: Classify and calibrate the node information and element information in the key data of the basic model in the design stage;

[0009] A3: According to the classification information of the nodes and elements of the basic model in the design stage, set the connection node information and connection element information of the hoisting stage, chord connection stage, hook release stage, and inclined web member connection stage at the support position in the construction stage, and establish a basic model in the construction stage; and extract the key data of the basic model in the construction stage from the information data of the basic model in the construction stage; wherein, the basic model in the construction stage includes the basic model of the hoisting stage, the basic model of the chord connection stage, the basic model of the hook release stage, and the basic model of the inclined web member connection stage at the support position;

[0010] A4: Integrate the key data and other data of the basic model in the construction stage to generate all the information data of the basic model in the construction stage;

[0011] A5: Use the MIDAS Gen structural analysis software to read in all the information data of the basic model in the construction stage, and the MIDAS Gen structural analysis software performs calculation and analysis according to the internal program to obtain the calculation result;

[0012] A6: Extract the node deformation data of the basic model in the construction stage for calculating the pre-adjustment value of assembly from the calculation result, and calculate the pre-adjustment value of assembly;

[0013] A7: Automatically generate a three-dimensional solid model that can be rotated and observed with node numbers, element numbers, node classification, element classification, result display, etc. through the MIDAS Gen structural analysis software.

[0014] Further, in step A6, the pre-adjustment value of assembly is calculated by the following formula:

[0015]

[0016] In the formula, is the pre-adjustment value of assembly, is the pre-deformation design value, is the pre-deformation design value of the self-weight of the main truss, is the pre-deformation value for offsetting the deformation value in the hoisting stage, The pre-deformation value for offsetting the deformation value in the hook-release stage.

[0017] Furthermore, the key data includes node information, element information, boundary condition information, and load case information, and the other data includes the version information of the modeling, structure type information, material information, and section information.

[0018] Furthermore, the node information of the basic model in the design stage includes: support nodes, upper chord structure nodes, and lower chord structure nodes; the element information of the basic model in the design stage includes: upper chord member elements, lower chord member elements, support elements at the support, vertical web member elements, and diagonal web member elements.

[0019] Furthermore, the connection node information of the basic model in the construction stage includes: support nodes, upper chord structure nodes, lower chord structure nodes, camber control points, element construction connection breakpoints, internal nodes of the lifting assembly, and internal nodes of the already-installed elements at the support; the connection element information of the model in the construction stage includes: upper chord member elements, lower chord member elements, support elements at the support, vertical web member elements, diagonal web member elements, sling elements, elements included in the lifting assembly, already-installed elements at the support, and elements to be installed after lifting.

[0020] Furthermore, the construction stage includes:

[0021] Lifting stage: After assembling the structural members into the basic model components in the design stage, use a crane to apply a lifting force through slings at the lifting point positions of the components, and hoist the components to the target positions;

[0022] Chord connection stage: After the components are hoisted to the target positions, connect the upper chord and the lower chord at the connection positions of the components. During the connection process, the lifting points of the components are not released from the hooks, and after the connection is completed, release the hooks;

[0023] Hook-release stage: After releasing the hooks, the self-weight load of the components is no longer transmitted through the lifting points of the components, but is transferred from the connection positions to the supports;

[0024] Diagonal web member connection stage at the support position: The crane hoists the diagonal web members at the support position to the target positions for supplementary connection.

[0025] The beneficial effects of the present invention are as follows:

[0026] Based on the key data of the basic model in the design stage of the present invention, by calibrating the classification of nodes and elements, the connection node information and connection element information in the hoisting stage, chord connection stage, hook release stage, and the connection stage of the diagonal web members at the support position during the construction stage are set to determine the composition logic of the basic model in each construction stage. The basic models in each stage during the construction stage are automatically generated by the program, and calculations and result processing are performed to realize the intelligent analysis of the pre-adjustment value during the assembly of the super-large truss structure construction process. The method can improve the analysis efficiency and accuracy. Further, by increasing the visualization of the model during the process, it can assist in ensuring the correctness of the input of model parameters.

[0027] Other advantages, objectives, and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0029] Figure 1 It is a flowchart of the intelligent analysis method according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the truss structure in stage a according to an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the truss structure in stage b according to an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the truss structure in stage c according to an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the truss structure in stage d according to an embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of the node information and element information in stage d according to an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the node information and element information in stage a according to an embodiment of the present invention;

[0036] Figure 8 It is a schematic diagram of the node information of the installed elements at the support according to an embodiment of the present invention.

[0037] Reference numerals: support node 1, upper chord structure node 2, lower chord structure node 3, camber control point 4, unit construction connection break point 5, internal node of lifting assembly 6, internal node of installed support unit 7, upper chord member unit 8, lower chord member unit 9, support unit at support 10, vertical web member unit 11, diagonal web member unit 12, sling unit 13, unit included in lifting assembly 14, installed support unit 15, post-lifting installed unit 16. Detailed implementation mode

[0038] As Figures 1 - 8 shown, the present invention provides an intelligent analysis method for the pre-adjustment value of the assembly of an ultra-large truss structure, including the following steps:

[0039] A1: Establish a basic model in the design stage. After preprocessing the information data of the basic model in the design stage, extract key data from the information data of the basic model in the design stage. Among them, the key data includes node information, unit information, boundary condition information, load condition information, etc.; among them, the preprocessing method is a conventional technical means in the art and will not be elaborated here;

[0040] A2: Classify and calibrate the node information and unit information in the key data of the basic model in the design stage. Among them, the node information of the basic model in the design stage includes: support node 1, upper chord structure node 2, lower chord structure node 3; the unit information of the basic model in the design stage includes: upper chord member unit 8, lower chord member unit 9, support unit at support 10, vertical web member unit 11, diagonal web member unit 12;

[0041] A3: According to the classification information of the nodes and units of the basic model in the design stage, set the connection node information and connection unit information in the lifting stage, chord connection stage, hook release stage, and diagonal web member connection stage at the support position in the construction stage as model parameters, and input the model parameter values to establish a basic model in the construction stage; and extract the key data of the basic model in the construction stage from the information data of the basic model in the construction stage;

[0042] Among them, the connection node information of the basic model in the construction stage includes: support node 1, upper chord structure node 2, lower chord structure node 3, camber control point 4, unit construction connection break point 5, internal node of the lifting assembly 6, internal node of the already installed unit at the support 7; the connection unit information of the construction stage model includes: upper chord member unit 8, lower chord member unit 9, support unit at the support 10, vertical web member unit 11, diagonal web member unit 12, sling unit 13, unit included in the lifting assembly 14, already installed unit at the support 15, post-lifting and to-be-installed unit 16; among them, the support node is the stress point at the support position; the upper chord structure node refers to the node included in the upper chord member; the lower chord structure node refers to the node included in the lower chord member; the camber control point refers to the node where the assembly pre-adjustment value (pre-deformation) is applied during the truss assembly; the unit construction connection break point refers to the break point of the truss during the construction process. During the construction process, the truss is connected at the position of the unit construction connection break point through components (or units) to form an integral whole; the internal node of the lifting assembly refers to the structural node included in the lifting part; the internal node of the already installed unit at the support refers to the unit whose support position has been installed, and the structural node included in it.

[0043] A4: Integrate the key data of the basic model in the construction stage with other data outside the key data to generate the overall data of the new model, and generate all the information data of the basic model in each stage; among them, other data refers to the non-key data in all the data that make up the model, and other data includes the version information of the modeling, structural type information, material information, and section information.

[0044] A5: Use the MIDAS Gen structural analysis software to read in all the information data of the basic model in the construction stage, perform calculation and analysis, and obtain the calculation results;

[0045] A6: Result data processing: Extract the node deformation data of the basic model in the construction stage used for calculating the assembly pre-adjustment value from the calculation results, and calculate the assembly pre-adjustment value; among them, the deformation data extracted from the calculation results includes: the deformation value of the camber control point 4, the deformation value of the unit construction connection break point 5; the assembly pre-adjustment value is calculated from the deformation value of the camber control point in the construction stage, the deformation value of the unit construction connection break point, and the pre-deformation design value given by the design unit.

[0046] The calculation process of the assembly pre-adjustment value is: Add the deformation value during the construction process to the pre-deformation design value of other loads (the pre-deformation design value of other loads is the pre-deformation design value minus the pre-deformation design value of the self-weight of the truss), and the deformation value of the control node is the assembly pre-adjustment value of the component. The direction of the assembly pre-adjustment value of the component is opposite to the direction of the deformation value.

[0047]

[0048] In the formula, is the pre-assembly adjustment value, is the pre-deformation design value, is the pre-deformation design value of the self-weight of the main truss, is the pre-deformation value to offset the deformation value during the hoisting stage, is the pre-deformation value to offset the deformation value during the hook-release stage;

[0049] Among them, the pre-deformation design value includes the pre-deformation design value under the action of dead load (offsetting the deformation value under the action of dead load) and the pre-deformation design value under the action of live load (offsetting the deformation value under the action of live load). The pre-deformation design value under the action of dead load includes the pre-deformation design value of the self-weight of the main truss and the pre-deformation design value of other dead loads;

[0050] The deformation values during the construction process mainly include the deformation value during the hoisting stage and the deformation value during the in-place connection; the deformation value during the in-place connection includes the deformation value during the in-place connection (chord connection), the deformation value during the in-place connection (hook release), and the deformation value during the in-place connection (diagonal web member connection at the support position). These deformation values are obtained by analyzing the basic model of the construction stage through the MIDAS Gen structural analysis software in step A5;

[0051] Among them, the pre-deformation value to offset the deformation value during the hoisting stage is calculated by subtracting the deformation value of the unit construction connection break point of the lower chord member unit during the hoisting stage from the deformation value of the arch control point during the hoisting stage, and taking the opposite value, that is, the value in the opposite direction of the deformation value of the arch control point relative to the unit construction connection break point of the lower chord member unit during the hoisting stage. Denote the "pre-deformation value to offset the deformation value during the hoisting stage" as ,"the deformation value of the arch control point during the hoisting stage" as ,"the deformation value of the unit construction connection break point of the lower chord member unit during the hoisting stage" as Among them, because there are multiple nodes, calculations should be carried out separately for each node. In addition, during the in-place connection (chord connection) stage, the lower chord member unit is usually connected first and then the upper chord member unit. Therefore, the subtracted item is the deformation value of the unit construction connection break point of the lower chord member unit. For the hoisting of super-large trusses, there are 2 unit construction connection break points of the lower chord member unit, and the average value of the two is taken;

[0052] The pre-deformation value to offset the deformation value during the in-place connection (chord connection) is mainly related to welding construction during the construction process, so it can be ignored;

[0053] The pre-deformation value to offset the deformation value during the in-place connection (hook release) is calculated by subtracting the deformation value of the unit construction connection break point of the lower chord member unit during the in-place connection (hook release) stage from the deformation value of the arch control point during the in-place connection (hook release) stage, and taking the opposite value. Denote the "pre-deformation value to offset the deformation value during the in-place connection (hook release)" as ,"the deformation value of the arch control point during the in-place connection (hook release) stage" as The deformation value of the unit construction connection break point of the lower chord member unit during the "in-place connection (unhooking) stage" is , where, because there are multiple nodes, calculations should be carried out for each node separately. Additionally, for the hoisting of an extra-large truss, there are 2 unit construction connection break points of the lower chord member unit, and the average value of the two is taken; the calculation formula is:

[0054] ;

[0055] The pre-deformation value that offsets the deformation value of the in-place connection (diagonal web member connection at the support position). Since after the installation of the lifted and installed unit is completed at this time, the entire truss forms a relatively large overall stiffness, and the loads affecting the deformation only increase the self-weight of the diagonal web members at the two support positions, this pre-deformation value can be ignored;

[0056] The deformation of the already-installed support unit at the unit construction connection break point at the lower chord member unit position can be ignored for an extra-large truss structure;

[0057] The pre-deformation design value of the self-weight of the main truss is calculated from the opposite value of the deformation value of the arch control point during the in-place connection (diagonal web member connection at the support position) stage. Denote the "deformation value of the arch control point during the in-place connection (diagonal web member connection at the support position) stage" as , and the calculation formula is: ;

[0058] A7: Visualization of the model: According to the relevant information data, generate a three-dimensional solid model that can be rotated and observed, with node numbers, element numbers, node classifications, element classifications, etc. displayed.

[0059] Among them, according to the construction process of component assembly, the construction process is divided into multiple stages, namely:

[0060] Stage a (hoisting): After assembling the structural components into the basic model components in the design stage, use a crane to apply a hoisting force at the component lifting points through slings, and hoist the component to the target position;

[0061] Stage b (chord member connection): After the component is hoisted to the target position, connect the upper chord member and the lower chord member at the connection position of the component. During the connection process, the component lifting points are not unhooked, and after the connection is completed, unhook; among them, the chord members include the upper chord member and the lower chord member;

[0062] Stage c (unhooking): After unhooking, the self-weight load of the component is no longer transmitted through the component lifting points, but is transferred from the connection position to the support;

[0063] Stage d (diagonal web member connection at the support position): The crane hoists the diagonal web member at the support position to the target position and performs supplementary connection.

[0064] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An intelligent analysis method for the pre-adjustment value of assembling a super-large truss structure, characterized in that It includes the following steps: A1: Establish a basic model in the design stage, preprocess the information data of the basic model in the design stage, and extract the key data of the basic model in the design stage; A2: Classify and calibrate the node information and element information in the key data of the basic model in the design stage; among them, the node information of the basic model in the design stage includes: support nodes, upper chord structure nodes, lower chord structure nodes; the element information of the basic model in the design stage includes: upper chord member elements, lower chord member elements, support elements at the support, vertical web member elements, diagonal web member elements; A3: According to the classification information of the nodes and elements of the basic model in the design stage, set the connection node information and connection element information in the hoisting stage, chord connection stage, hook release stage, and diagonal web member connection stage at the support position in the construction stage, and establish a basic model in the construction stage; and extract the key data of the basic model in the construction stage from the information data of the basic model in the construction stage; among them, the key data includes node information, element information, boundary condition information, and load condition information; among them, the basic model in the construction stage includes a basic model in the hoisting stage, a basic model in the chord connection stage, a basic model in the hook release stage, and a basic model in the diagonal web member connection stage at the support position; among them, the node information of the basic model in the construction stage includes: support nodes, upper chord structure nodes, lower chord structure nodes, camber control points, unit construction connection breakpoints, internal nodes of the hoisting assembly, internal nodes of the already installed support units; the element information of the construction stage model includes: upper chord member elements, lower chord member elements, support elements at the support, vertical web member elements, diagonal web member elements, sling elements, elements included in the hoisting assembly, already installed support units, units to be installed after hoisting; A4: Integrate the key data and other data of the basic model in the construction stage to generate all the information data of the basic model in the construction stage; among them, the other data includes modeling version information, structure type information, material information, and section information; A5: Use the MIDAS Gen structural analysis software to read in all the information data of the basic model in the construction stage, and the MIDAS Gen structural analysis software performs calculation and analysis according to the internal program to obtain the calculation results; A6: Extract the node deformation data of the basic model in the construction stage for calculating the assembly pre-adjustment value from the calculation results, and calculate the assembly pre-adjustment value; A7: Automatically generate a three-dimensional solid model that can be rotated and observed with node numbers, element numbers, node classifications, element classifications, and result displays through the MIDAS Gen structural analysis software.

2. The intelligent analysis method for the pre-adjustment value of the assembly of the super-large truss structure according to claim 1, characterized in that: In step A6, the assembly pre-adjustment value is calculated by the following formula: Wherein, is the pre-assembly adjustment value, is the pre-deformation design value, is the pre-deformation design value of the self-weight of the main truss, is the pre-deformation value for offsetting the deformation value during the lifting stage, is the pre-deformation value for offsetting the deformation value during the hook-release stage.

3. The intelligent analysis method for the pre-adjustment value of the assembly of the super-large truss structure according to claim 1, characterized in that: The construction stage includes: Hoisting stage: After assembling the structural members into the basic model components in the design stage, use a crane to apply a hoisting force at the sling point position of the components through slings, and hoist the components to the target position; Chord connection stage: After the components are hoisted to the target position, connect the upper chord and the lower chord at the connection position of the components. During the connection process, the sling points of the components are not unhooked, and after the connection is completed, unhook the sling; Hook release stage: After unhooking, the self-weight load of the components is no longer transmitted through the sling points of the components, but is transferred from the connection position to the supports; Connection stage of the diagonal web member at the support position: The crane hoists the diagonal web member at the support position to the target position for supplementary connection.

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