CN117131571A - BIM-based arch rib closure technology and arch rib construction technology - Google Patents
BIM-based arch rib closure technology and arch rib construction technology Download PDFInfo
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- CN117131571A CN117131571A CN202311060870.3A CN202311060870A CN117131571A CN 117131571 A CN117131571 A CN 117131571A CN 202311060870 A CN202311060870 A CN 202311060870A CN 117131571 A CN117131571 A CN 117131571A
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- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000004458 analytical method Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 17
- 230000004044 response Effects 0.000 claims abstract description 17
- 238000013461 design Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000011900 installation process Methods 0.000 claims abstract description 6
- 238000011156 evaluation Methods 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 5
- 230000035882 stress Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
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- 238000001514 detection method Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 230000008646 thermal stress Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The application relates to the technical field of arch bridge construction, and particularly discloses a BIM-based arch rib closure technology and an arch rib construction technology, wherein the arch rib closure technology comprises the following contents: s1, acquiring temperature data and establishing a temperature field; s2, assembling the arch ribs of the steel truss arch bridge according to the construction sequence required by the steel truss arch bridge; s3, carrying out finite element analysis according to the arch rib three-dimensional model and the temperature field data of the closure section, and evaluating the structural response and deformation conditions of the closure section arch rib at different temperatures; s4, performing actual construction according to the evaluation result; s5, estimating closure time according to the temperature field and the design specified closure temperature; s6, installing closure section arch ribs at the estimated closure time; continuously monitoring an actual temperature value and other measurement items in the installation process; and S7, judging whether the actual temperature value and other measurement items meet design rules, and if so, completing the installation of the closure segment arch rib. By adopting the technical scheme of the application, the temperature change can be effectively measured, and the smooth construction of the closure section is ensured.
Description
Technical Field
The application relates to the technical field of arch bridge construction, in particular to a BIM-based arch rib closure technology and an arch rib construction technology.
Background
The construction of the large-span steel truss arch bridge generally comprises the steps of arch foundation pit excavation, side slope protection, arch foundation construction, junction pier construction, buckling tower construction, steel arch ring installation, arch foot concrete pouring, buckling cable and buckling tower dismantling, bridge approach T beam erection, arch upper upright column installation, combined beam erection, bridge deck slab and wet joint pouring, auxiliary engineering construction and the like.
When the steel arch ring is installed, the arch ribs are required to be hoisted by using a cable crane according to the designed sequence for assembly. During final closure, temperature changes can cause thermal expansion and contraction of the rib structure material, thereby causing deformation of the structure. The change in temperature can also cause thermal stresses to develop within the structure. Particularly in large span bridges, due to uneven temperature distribution, the temperature difference at different parts can cause concentration of internal stress, and the internal stress can exceed the bearing capacity of structural materials, thereby affecting the safety of the structure. Because the closure construction has higher requirements on the accurate butt joint and the stability of the structure, the influence of temperature on the closure construction is larger.
Therefore, a arch rib closure technology and an arch rib construction technology based on BIM are required, which can effectively measure temperature change and ensure smooth construction of closure segments and safety of structures.
Disclosure of Invention
One of the purposes of the application is to provide a BIM-based arch rib closure technology, which can effectively measure temperature change and ensure smooth construction of closure sections.
In order to solve the technical problems, the application provides the following technical scheme:
BIM-based arch rib closure technology comprises the following contents:
s1, installing temperature measuring equipment at a construction site, acquiring temperature data from the temperature measuring equipment, and establishing a temperature field according to the temperature data; the temperature data comprises a temperature value and a temperature measurement time;
s2, in BIM software, sequentially assembling arch ribs of the steel truss arch bridge according to the construction sequence required by the steel truss arch bridge;
s3, before assembling the arch rib of the closure section, finite element analysis is carried out according to the three-dimensional model of the arch rib of the closure section and temperature field data, and structural response and deformation conditions of the arch rib of the closure section at different temperatures are evaluated;
s4, performing actual construction according to the evaluation result;
s5, estimating closure time according to the temperature field and the design specified closure temperature;
s6, installing closure section arch ribs at the estimated closure time; continuously monitoring an actual temperature value and other measurement items in the installation process, wherein the other measurement items comprise key section stress of an arch rib, buckling rope, back rope force, wind speed and direction;
and S7, judging whether the actual temperature value and other measurement items meet design rules, and if so, completing the installation of the closure segment arch rib.
The basic scheme principle and the beneficial effects are as follows:
in the scheme, an accurate temperature field can be established by installing temperature measuring equipment and acquiring temperature data. The method is helpful for knowing the temperature change condition of the arch rib at different positions and times, and provides accurate temperature information for subsequent structural analysis and construction decisions.
And the temperature field data and the three-dimensional model of the arch rib are utilized to carry out finite element analysis, so that the structural response and deformation condition of the arch rib at different temperatures can be estimated. This helps to determine the safety and stability of the rib during closure and to take the necessary measures to adjust and optimize.
And according to the temperature field and design rules, estimating the closure time and installing. Meanwhile, the actual temperature value and other measurement items are continuously monitored in the installation process, such as key section stress, cable force, wind speed, direction and the like of the arch rib. This ensures that the closure segment rib is installed at a temperature that meets design specifications, reducing the adverse effects of temperature differences on the structure.
In summary, the method utilizes BIM technology and accurate measurement of temperature data to provide effective basis and control for arch rib closure construction, ensure smooth construction and reduce adverse effects caused by temperature.
Further, the step S3 specifically includes:
s301, performing grid division on a three-dimensional model of the closure segment arch rib, and dispersing the three-dimensional model into a finite element model;
s302, defining corresponding mechanical properties for materials of the closure segment arch rib, wherein the mechanical properties comprise elastic modulus, poisson' S ratio and linear expansion coefficient;
s303, setting boundary conditions for the finite element model, wherein the boundary conditions comprise constraint conditions, loading conditions and temperature loading conditions;
s304, carrying out temperature field analysis on the finite element model by using finite element analysis software, and calculating structural response and deformation conditions of the closure segment arch rib at different temperatures, wherein the structural response and deformation conditions comprise displacement, stress and strain results;
s305, evaluating whether structural response and deformation conditions of the closed section arch rib truss sheet at different temperatures meet design requirements according to the result of finite element analysis.
The three-dimensional model of the closure segment arch rib is subjected to grid division and is discretized into a finite element model, so that the accurate simulation of the arch rib structure can be realized. In finite element analysis, corresponding mechanical properties such as modulus of elasticity, poisson's ratio, and coefficient of linear expansion are defined for the material of the closure segment rib. This more accurately simulates the mechanical behavior of the material and analyzes the structural response caused by temperature changes. Proper boundary conditions are set for the closure segment arch rib, so that loading and constraint conditions under actual working conditions can be simulated, and accuracy and reliability of analysis results are ensured.
And (5) according to the result of finite element analysis, evaluating whether the structural response and deformation conditions of the closure segment arch rib truss sheet at different temperatures meet the design requirements. By comparing the analysis result with the design requirement, the safety and stability of the structure can be judged, and necessary measures are taken for adjustment and optimization.
Further, in the step S303, the constraint condition is used to simulate the fixed supporting condition of the closure segment arch rib; the loading conditions are used to simulate external forces or loads applied to the closure segment rib; the temperature loading condition is used for simulating different temperatures of the closure segment arch rib according to the temperature field.
In step S3, closure of the arch rib of the steel truss arch bridge is completed in the BIM software, and a reference BIM model of the steel truss arch bridge is established; the ribs in the reference BIM three-dimensional model are independently numbered.
Further, in the step S4, a synchronous BIM model of the steel truss arch bridge is also built in the BIM software according to the actual construction progress; the rib state in the synchronous BIM model is consistent with the actual installation state.
By establishing a reference BIM model in BIM software and independently numbering the arch ribs, the consistency and accuracy of data can be ensured. All related parties can share the same reference model, and unique identification is carried out on the arch rib through the number, so that information exchange and management are facilitated.
The synchronous BIM model can update the state of the arch rib according to the actual construction progress, and real-time construction progress control is realized. The related party can know the installation state of the arch rib through the BIM model, and timely adjust the construction plan and the resource allocation to ensure the smooth construction; the occurrence of errors and conflicts can be reduced, for example, the problem in arch rib installation can be timely found and solved through the visualization and collision detection functions of the BIM model, and the construction efficiency and quality are improved.
Further, in step S4, reference BIM models and synchronous BIM models are displayed synchronously, the numbers of the ribs in the installation of the synchronous BIM models are obtained, and the corresponding ribs are marked with reference BIM models according to the obtained numbers of the ribs.
Visual management of the rib installation process can be achieved by synchronously displaying the reference BIM model and the synchronous BIM model and marking the corresponding ribs in the reference BIM model. Constructors can intuitively know the difference between the reference BIM model and the actual installation state, discover and solve possible problems in time, and improve the construction accuracy and efficiency.
Further, in step S4, a link between the arch rib and the corresponding continuously monitored actual temperature value and other measured items is also established, and when the arch rib in installation is selected in the synchronous BIM model, the corresponding actual temperature value and other measured items are synchronously displayed.
By establishing a link between the arch rib and the actual temperature value and other measurement items, when the arch rib is selected in the synchronous BIM model, the relevance between the real-time monitoring data and the corresponding arch rib can be realized. The constructors and related parties can intuitively know the actual temperature value, stress, cable force and other monitoring data of each arch rib, and help them to accurately evaluate and decide the construction progress and the structural state. According to the method and the device, constructors do not need to additionally consult the monitoring report or the data table, and accessibility and access efficiency of information are improved.
The second object of the present application is to provide a arch rib construction technique based on BIM, which uses the arch rib closure technique.
Drawings
FIG. 1 is a schematic illustration of a steel truss arch bridge prior to closure of the rib;
fig. 2 is a flow chart of a first embodiment of a BIM-based rib closure technique.
Detailed Description
The following is a further detailed description of the embodiments:
example 1
As shown in fig. 2, the arch rib closure technique based on BIM of the present embodiment includes the following contents:
s1, installing temperature measuring equipment at a construction site, acquiring temperature data from the temperature measuring equipment, and establishing a temperature field according to the temperature data; the temperature data comprises a temperature value and a temperature measurement time;
s2, in BIM software, sequentially assembling arch ribs of the steel truss arch bridge according to the construction sequence required by the steel truss arch bridge;
s3, before assembling the arch rib of the closure section, finite element analysis is carried out according to the three-dimensional model of the arch rib of the closure section and temperature field data, and structural response and deformation conditions of the arch rib of the closure section at different temperatures are evaluated; closing the arch rib of the steel truss arch bridge in BIM software, and establishing a reference BIM model of the steel truss arch bridge; the ribs in the reference BIM three-dimensional model are independently numbered.
The finite element analysis specifically includes:
s301, performing grid division on a three-dimensional model of the closure segment arch rib, and dispersing the three-dimensional model into a finite element model; the density and fineness of the meshing should be appropriately selected according to the requirements of the analysis and the complexity of the model.
S302, defining corresponding mechanical properties for materials of the closure segment arch rib, wherein the mechanical properties comprise elastic modulus, poisson' S ratio and linear expansion coefficient. In this example, the mechanical properties are set according to the actual physical parameters of the material.
S303, setting boundary conditions for the finite element model, wherein the boundary conditions comprise constraint conditions, loading conditions and temperature loading conditions. In this embodiment, the emphasis is on applying the appropriate temperature loading to the model of the closure segment rib based on the temperature field data.
In this embodiment, the constraint conditions are used to simulate the fixed support conditions of the closure segment rib, such as boundaries that prohibit displacement or rotation; the loading conditions are used to simulate external forces or loads applied to the closure segment ribs, such as static loads, dynamic loads, wind loads; the temperature loading condition is used for simulating different temperatures of the closure segment arch rib according to the temperature field. For example, a corresponding temperature value may be applied to the surface or specific location of the rib.
S304, carrying out temperature field analysis on the finite element model by using finite element analysis software, and calculating structural response and deformation conditions of the closure segment arch rib at different temperatures, wherein the structural response and deformation conditions comprise displacement, stress and strain results.
S305, evaluating whether structural response and deformation conditions of the closed section arch rib truss sheet at different temperatures meet design requirements according to the result of finite element analysis. By correctly setting constraint conditions, loading conditions and temperature loading conditions, the structural response and deformation conditions of the closure segment arch rib truss sheet at different temperatures can be accurately simulated, and reliable analysis results and basis are provided for design and construction.
S4, performing actual construction according to the evaluation result; according to the actual construction progress, a synchronous BIM model of the steel truss arch bridge is built in BIM software; the rib state in the synchronous BIM model is consistent with the actual installation state. And synchronously displaying the reference BIM model and the synchronous BIM model, acquiring the arch rib numbers in the installation of the synchronous BIM model, and marking the corresponding arch ribs in the reference BIM model according to the acquired arch rib numbers.
S5, estimating closure time according to the temperature field and the design specified closure temperature;
s6, installing closure section arch ribs at the estimated closure time; continuously monitoring an actual temperature value and other measurement items in the installation process, wherein the other measurement items comprise key section stress of an arch rib, buckling rope, back rope force, wind speed and direction; and a link between the closure segment arch rib and the corresponding continuously monitored actual temperature value and other measurement items is also established, and when the closure segment arch rib is selected in the synchronous BIM model, the corresponding actual temperature value and other measurement items are synchronously displayed.
And S7, judging whether the actual temperature value and other measurement items meet design rules, and if so, completing the installation of the closure segment arch rib.
The foregoing is merely an embodiment of the present application, the present application is not limited to the field of this embodiment, and the specific structures and features well known in the schemes are not described in any way herein, so that those skilled in the art will know all the prior art in the field before the application date or priority date of the present application, and will have the capability of applying the conventional experimental means before the date, and those skilled in the art may, in light of the present application, complete and implement the present scheme in combination with their own capabilities, and some typical known structures or known methods should not be an obstacle for those skilled in the art to practice the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. BIM-based arch rib closure technology is characterized by comprising the following steps:
s1, installing temperature measuring equipment at a construction site, acquiring temperature data from the temperature measuring equipment, and establishing a temperature field according to the temperature data; the temperature data comprises a temperature value and a temperature measurement time;
s2, in BIM software, sequentially assembling arch ribs of the steel truss arch bridge according to the construction sequence required by the steel truss arch bridge;
s3, before assembling the arch rib of the closure section, finite element analysis is carried out according to the three-dimensional model of the arch rib of the closure section and temperature field data, and structural response and deformation conditions of the arch rib of the closure section at different temperatures are evaluated;
s4, performing actual construction according to the evaluation result;
s5, estimating closure time according to the temperature field and the design specified closure temperature;
s6, installing closure section arch ribs at the estimated closure time; continuously monitoring an actual temperature value and other measurement items in the installation process, wherein the other measurement items comprise key section stress of an arch rib, buckling rope, back rope force, wind speed and direction;
and S7, judging whether the actual temperature value and other measurement items meet design rules, and if so, completing the installation of the closure segment arch rib.
2. The BIM-based arch rib closure technique of claim 1, wherein: the step S3 specifically includes:
s301, performing grid division on a three-dimensional model of the closure segment arch rib, and dispersing the three-dimensional model into a finite element model;
s302, defining corresponding mechanical properties for materials of the closure segment arch rib, wherein the mechanical properties comprise elastic modulus, poisson' S ratio and linear expansion coefficient;
s303, setting boundary conditions for the finite element model, wherein the boundary conditions comprise constraint conditions, loading conditions and temperature loading conditions;
s304, carrying out temperature field analysis on the finite element model by using finite element analysis software, and calculating structural response and deformation conditions of the closure segment arch rib at different temperatures, wherein the structural response and deformation conditions comprise displacement, stress and strain results;
s305, evaluating whether structural response and deformation conditions of the closed section arch rib truss sheet at different temperatures meet design requirements according to the result of finite element analysis.
3. The BIM-based arch rib closure technique of claim 2, wherein: in the step S303, the constraint condition is used for simulating the fixed supporting condition of the closure segment arch rib; the loading conditions are used to simulate external forces or loads applied to the closure segment rib; the temperature loading condition is used for simulating different temperatures of the closure segment arch rib according to the temperature field.
4. A BIM-based arch rib closure technique in accordance with claim 3, wherein: in the step S3, closure of the arch rib of the steel truss arch bridge is completed in BIM software, and a reference BIM model of the steel truss arch bridge is established; the ribs in the reference BIM three-dimensional model are independently numbered.
5. The BIM-based arch rib closure technique of claim 4, wherein: in the step S4, a synchronous BIM model of the steel truss arch bridge is built in BIM software according to the actual construction progress; the rib state in the synchronous BIM model is consistent with the actual installation state.
6. The BIM-based arch rib closure technique of claim 5, wherein: in the step S4, reference BIM models and synchronous BIM models are also displayed synchronously, arch rib numbers in installation in the synchronous BIM models are obtained, and corresponding arch ribs are marked in reference BIM models according to the obtained arch rib numbers.
7. The BIM-based arch rib closure technique of claim 6, wherein: in the step S4, a link between the arch rib and the corresponding continuously monitored actual temperature value and other measurement items is also established, and when the arch rib in installation is selected in the synchronous BIM model, the corresponding actual temperature value and other measurement items are synchronously displayed.
8. A BIM-based arch rib construction technique, characterized in that the technique according to any one of claims 1 to 7 is used.
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| CN202311060870.3A CN117131571A (en) | 2023-08-22 | 2023-08-22 | BIM-based arch rib closure technology and arch rib construction technology |
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| WO2022047970A1 (en) * | 2020-09-01 | 2022-03-10 | 浙江勤业建工集团有限公司 | Bim-based method for simulated calculation of deep foundation pit before construction |
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2023
- 2023-08-22 CN CN202311060870.3A patent/CN117131571A/en active Pending
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| CN102979307A (en) * | 2012-12-12 | 2013-03-20 | 新疆生产建设兵团金来建设工程技术研发有限责任公司 | Temperature-controlled crack prevention construction method for concrete structure |
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