Intelligent analysis method for assembling preset value of oversized truss structure

Abstract

The invention discloses an intelligent analysis method for an assembly preset value of an oversized truss structure, and belongs to the technical field of intelligent calculation of building structures, and the method comprises the following steps: building a design stage basic model, and extracting key data of the design stage basic model; classifying and calibrating node information and unit information in the key data of the basic model in the design stage; connecting node information and connecting unit information of a hoisting stage, a chord member connecting stage, a hook loosening stage and a support position diagonal web member connecting stage in the construction stage are set, and a basic model of the construction stage is established; key data of the construction stage basic model are extracted from the information data of the construction stage basic model, other data are integrated, and all information data of the construction stage basic model are generated; calculating and analyzing all information data of the basic model in the construction stage to obtain a calculation result; and extracting node deformation data of the construction stage basic model used for calculating the splicing preset value, and calculating to obtain the splicing preset 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 Art

[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 the key work to control the completion degree of the steel structure. Pre-deformation refers to the initial deformation setting carried out in advance to enable the structure or component after construction to reach the control target of the designed geometric positioning. For a super-large truss structure, a single truss structure generally consists of multiple spans. Each span of the truss structure has a large self-weight and is usually connected to the components at the support after being hoisted and lifted in place. 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 requires a large amount of work on the one hand, 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 rather 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 calculations and result processing to realize the intelligent analysis of the pre-adjustment value of the assembly of the super-large truss structure during the construction process. The method can improve the analysis efficiency and accuracy. Further, by adding 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 calculations and result processing to realize the intelligent analysis of the pre-adjustment value of the assembly of the super-large truss structure during the construction process.

[0005] To achieve the above object, the present invention provides the following technical solutions: The present invention provides an intelligent analysis method for the pre-adjustment value of assembling an ultra-large truss structure, comprising the following steps: 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; A2: Classify and calibrate the node information and element information in the key data of the basic model in the design stage; 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 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; wherein, 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; 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; A5: Use the MIDAS Gen structural analysis software to read in all the information data of the basic model in the construction stage, and perform calculation and analysis by the MIDAS Gen structural analysis software 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 pre-adjustment value of assembly from the calculation results, and calculate the pre-adjustment value of assembly; A7: Automatically generate a three-dimensional solid model that can be rotated and observed with node numbers, element numbers, node classifications, element classifications, result displays, etc. through the MIDAS Gen structural analysis software.

[0006] Furthermore, in step A6, the pre-adjustment value of assembly is calculated by the following formula: 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, is the pre-deformation value for offsetting the deformation value in the hook release stage.

[0007] Furthermore, the key data includes node information, element information, boundary condition information, and load condition information, and the other data includes modeling version information, structure type information, material information, and section information.

[0008] 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 members, lower chord members, support elements at the supports, vertical web members, and diagonal web members.

[0009] 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, construction connection breakpoints of elements, internal nodes of the lifting components, and internal nodes of the already installed support units; the connection element information of the model in the construction stage includes: upper chord members, lower chord members, support elements at the supports, vertical web members, diagonal web members, sling elements, elements included in the lifting components, already installed support units, and post-lifting installed units.

[0010] Furthermore, the construction stage includes: Lifting stage: After assembling the structural components into the basic model components in the design stage, use a crane to apply a lifting force at the lifting point positions of the components through slings, and hoist the components to the target positions. 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 unhooked, and the hooks are released after the connection is completed. Unhooking stage: After unhooking, 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. Diagonal web member connection stage at the support position: The crane hoists the diagonal web members at the support positions to the target positions and performs supplementary connection.

[0011] The beneficial effects of the present invention are as follows: Based on the key data of the basic model in the design stage of the present invention, through node and element classification calibration, the connection node information and connection element information in the lifting stage, chord connection stage, unhooking stage, and diagonal web member connection stage at the support position in the construction stage are set to determine the composition logic of the basic model in each construction stage. The basic models in each stage of 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 values during the assembly of the super-large truss structure construction process. The method can improve the analysis efficiency and accuracy. Further, the visualization of the model is increased during the process, which can assist in ensuring the correctness of the input of model parameters.

[0012] 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 achieved and obtained through the following specification. Description of the Drawings

[0013] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the following drawings are provided for illustration: Figure 1 Flow chart of the intelligent analysis method for the embodiment of the present invention; Figure 2 Schematic diagram of the truss structure in stage a of the embodiment of the present invention; Figure 3 Schematic diagram of the truss structure in stage b of the embodiment of the present invention; Figure 4 Schematic diagram of the truss structure in stage c of the embodiment of the present invention; Figure 5 Schematic diagram of the truss structure in stage d of the embodiment of the present invention; Figure 6 Schematic diagram of the node information and element information in stage d of the embodiment of the present invention; Figure 7 Schematic diagram of the node information and element information in stage a of the embodiment of the present invention; Figure 8 Schematic diagram of the node information of the already-installed support units in the embodiment of the present invention.

[0014] 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 the lifting assembly 6, internal node of the already-installed support unit 7, 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 support unit 15, unit to be installed after lifting 16. Detailed implementation manners

[0015] 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: A1: Establish a basic model in the design stage. After performing data preprocessing on 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, element information, boundary condition information, load case information, etc.; among them, the preprocessing method is a conventional technical means in the art and will not be elaborated here; 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 node 1, upper chord structure node 2, lower chord structure node 3; the element information of the basic model in the design stage 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; A3: 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 as model parameters according to the classification information of nodes and elements in the basic model of the design stage, and input the model parameter values to establish the basic model of the construction stage; and extract the key data of the basic model of the construction stage from the information data of the basic model of the construction stage; Among them, the connection node information of the basic model of 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 hoisting component 6, internal node of the already installed unit at the support 7; the connection element 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, inclined web member unit 12, sling unit 13, unit included in the hoisting component 14, already installed unit at the support 15, post-hoisting 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 segmentation during the construction process, and 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 body; the internal node of the hoisting component refers to the structural node included in the hoisting part; the internal node of the already installed unit at the support refers to the unit whose installation at the support position has been completed, and the structural node included in it.

[0016] A4: Integrate the key data of the basic model of the construction stage with other data other than the key data to generate the overall data of the new model, and generate all the information data of the basic model of 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.

[0017] A5: Use the MIDAS Gen structural analysis software to read in all the information data of the basic model of the construction stage, perform calculation and analysis, and obtain the calculation results; A6: Result data processing: Extract the node deformation data of the basic model of the construction stage used to calculate 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, the deformation value of the unit construction connection break point in the construction stage, and the pre-deformation design value given by the design unit; The calculation process of the pre-assembly adjustment value is as follows: the deformation value during construction is added 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). The deformation value of the control node is the pre-assembly adjustment value of the component, and the direction of the pre-assembly adjustment value of the component is opposite to the direction of the deformation value; 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 unhooking stage; 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; The deformation value during construction mainly includes 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 (unhooking), and the deformation value during the in-place connection (oblique 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; 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 takes 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; The pre-deformation value to offset the deformation value during the in-place connection (chord connection) can be ignored during construction as it mainly involves welding construction; The pre-deformation value for offsetting the deformation value of the in-place connection (unhooking) is calculated by subtracting the deformation value of the unit construction connection break point of the lower chord member in the in-place connection (unhooking) stage from the deformation value of the camber control point in the in-place connection (unhooking) stage, and taking the opposite value. Denote the "pre-deformation value for offsetting the deformation value of the in-place connection (unhooking)" as ; the "deformation value of the camber control point in the in-place connection (unhooking) stage" is ; the "deformation value of the unit construction connection break point of the lower chord member in the in-place connection (unhooking) stage" is . Among them, because there are multiple nodes, calculations should be carried out separately for each node. In addition, for the hoisting of super-large trusses, there are 2 unit construction connection break points of the lower chord member, and the average value of the two is taken; the calculation formula is: ; The pre-deformation value for offsetting the deformation value of the in-place connection (oblique web member connection at the support position). Since the entire truss forms a relatively large overall stiffness after installing the lifted and installed unit at this time, and the load affecting the deformation only increases the self-weight of the oblique web members at the two support positions, this pre-deformation value can be ignored; The deformation of the unit construction connection break point of the already installed unit at the support at the position of the lower chord member can be ignored for super-large truss structures; The pre-deformation design value of the self-weight of the main truss is calculated by taking the opposite value of the deformation value of the camber control point in the in-place connection (oblique web member connection at the support position). Denote the "deformation value of the camber control point in the in-place connection (oblique web member connection at the support position)" as , and the calculation formula is: ; 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.

[0018] Among them, according to the construction process of component assembly, the construction process is divided into multiple stages, which are respectively: Stage a (lifting): After assembling the structural components into the basic model components in the design stage, use a crane to apply a lifting force at the lifting point position of the component through a sling, and hoist the component to the target position; 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 lifting point of the component is not unhooked, and unhooking is carried out after the connection is completed; among them, the chord members include the upper chord member and the lower chord member; Stage c (unhooking): After unhooking, the self-weight load of the component is no longer transmitted through the lifting point of the component, but is transferred from the connection position to the support; Stage d (oblique web member connection at the support position): The crane hoists the oblique web member at the support position to the target position and makes supplementary connection.

[0019] 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 to it in terms of form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An intelligent analysis method for pre-setting values ​​of super-large truss structure assembly, characterized in that: The following steps are involved: A1: Establish a basic model for the design phase, and extract key data of the basic model for the design phase after preprocessing the information data of the basic model for the design phase; A2: Classify and calibrate the node information and unit information in the key data of the basic model in the design stage; the node information of the basic model in the design stage includes: support nodes, upper chord structure nodes, and lower chord structure nodes; the unit information of the basic model in the design stage includes: upper chord member unit, lower chord member unit, support unit at the support, vertical web member unit, and diagonal web member unit; A3: According to the classification information of nodes and units of the basic model in the design stage, the connection node information and connection unit information of the hoisting stage, chord connection stage, hook release stage and diagonal bar connection stage at the support position in the construction stage are set to establish the basic model in the construction stage; and the key data of the basic model in the construction stage is extracted from the information data of the basic model in the construction stage; wherein the key data includes node information, unit information, boundary condition information and load condition information; wherein the basic model in the construction stage includes the basic model in the hoisting stage, the basic model in the chord connection stage, the basic model in the hook release stage and the basic model in the diagonal bar connection stage at the support position; wherein the node information of the basic model in the construction stage includes: support node, upper chord structure node, lower chord structure node, arch control point, unit construction connection breakpoint, lifting component internal node, support installed unit internal node; the construction stage model unit information includes: upper chord unit, lower chord unit, support unit at the support, vertical bar unit, diagonal bar unit, sling unit, lifting component included unit, support installed unit, lifting post installed unit; A4: Integrate the key data and other data of the basic model in the construction phase to generate all the information data of the basic model in the construction phase; the other data includes modeling version information, structure type information, material information, and section information; A5: Use MIDAS Gen structural analysis software to read all the information data of the basic model in the construction stage, and MIDASGen structural analysis software will perform calculations and analysis according to the built-in program to obtain the calculation results; A6: Extract the node deformation data of the basic model in the construction phase used to calculate the assembly pre-adjustment value from the calculation results, and calculate the assembly pre-adjustment value; A7: MIDAS Gen structural analysis software automatically generates a rotatable three-dimensional model with node numbering, element numbering, node classification, element classification, result display, etc.

2. The intelligent analysis method for pre-setting values ​​of super-large truss structure assembly according to claim 1 is characterized by: In step A6, the assembly preset value is calculated by the following formula: In the formula, To assemble the preset value, is the pre-deformation design value, is the pre-deformation design value of the main truss's deadweight, To offset the pre-deformation value during the lifting phase, The pre-deformation value is used to offset the deformation value in the hook release stage.

3. The intelligent analysis method for pre-adjustment value of super-large truss structure assembly according to claim 1 is characterized by: The construction phases include: Lifting stage: After assembling the structural components into the basic model components in the design stage, use a crane to apply lifting force at the component lifting point through a sling to lift the component to the target location; Chord connection stage: After the assembly is hoisted to the target position, the upper chord and the lower chord are connected to the connection position of the assembly. The assembly hanging point is not loosened during the connection process, and the hook is loosened after the connection is completed; Hook release stage: After the hook is released, the deadweight load of the component is no longer transmitted through the component hanging point, but is transferred from the connection position to the support; Support position diagonal brace connection stage: the crane hoists the support position diagonal brace to the target position for supplementary connection.

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