Chemical calculation method for carbon emission in large-span space steel structure construction

Abstract

The invention relates to a large-span space steel structure construction carbon emission quantitative calculation method, which comprises the following steps: carrying out visual analysis on carbon emission during a large-span space steel structure construction period based on CiteSpace, and defining key factors in large-span space public building quantitative calculation; the carbon emission quantitative calculation method comprises the following steps: S1, determining a boundary of carbon emission calculation of a large-span space steel structure in combination with a large-span space structure system; s2, establishing a large-span space steel structure construction digital model; s3, defining a large-span space steel structure carbon emission calculation method; according to the method, the carbon emission during the construction period of the large-span space steel structure is visually analyzed, the calculation method of the carbon emission of the large-span space steel structure in the construction process is defined, and the carbon emission is rapidly calculated in cooperation with the digital model, so that related carbon emission data can be rapidly obtained to provide a basis for carbon emission reduction optimization analysis, and the carbon emission reduction efficiency is improved. And the problem of high energy consumption caused by manual work amount statistics in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the field of carbon emission technology, and in particular to a method for quantitatively calculating carbon emissions from the construction of large-span steel structures. Background Art

[0002] With the development of construction technology, large-span public buildings have attracted much attention. In addition to traditional public buildings such as stadiums and exhibition halls, large public buildings such as entertainment venues and transportation hubs are also popular around the world. These buildings all need to adopt large-span spatial structural systems as support. Large-span spatial structures have good load-bearing performance and rigidity, and are relatively light in weight. The structural systems are diverse and complex, including grid structures, lattice structures, thin shell structures, suspensory dome structures, suspension structures, and cable dome structures. However, at the same time, large-span public buildings also bring higher energy consumption and carbon emissions, and also have greater potential for energy conservation and carbon reduction. Therefore, detailed research on the carbon emissions generated by the construction stage of large public buildings has important application value for achieving low-carbon development in the construction industry and promoting energy conservation and emission reduction.

[0003] The existing carbon emission calculation method applicable to ordinary steel-structured civil buildings mainly relies on manual statistics of engineering quantities. The early data collection work requires a lot of researchers' energy, and the results are relatively abstract and single, lacking a visual display of the calculation results. It is not conducive to comprehensive emission reduction optimization analysis of carbon emissions of large-span public buildings based on carbon emissions at each stage. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a method for quantitative calculation of carbon emissions from large-span steel structure construction, so as to solve the problem that manual engineering quantity statistics in the prior art is labor-intensive and not conducive to carbon emission reduction optimization analysis.

[0005] To achieve the above objectives, the present invention provides a method for quantitatively calculating carbon emissions during the construction of large-span steel structures. Based on CiteSpace, the method visually analyzes carbon emissions during the construction of large-span steel structures and clarifies the key factors in the quantitative calculation of large-span public buildings. The method comprises the following steps:

[0006] S1. Clarify the boundaries of carbon emission calculation for large-span steel structures in combination with large-span spatial structural systems;

[0007] S2. Establish a digital model for large-span steel structure construction;

[0008] S3. Define the calculation method for carbon emissions of large-span steel structures;

[0009] S4. Rapid calculation of carbon emissions during the entire construction process of large-span spatial steel structures based on digital models.

[0010] By adopting this technical solution, the carbon emissions during the construction of large-span spatial steel structures are visualized based on CiteSpace, and a calculation method for the carbon emissions of large-span spatial steel structures during the construction process is defined. In combination with digital models, carbon emissions are quickly calculated. This can not only quickly obtain relevant carbon emission data to provide a basis for carbon emission reduction optimization analysis, but also make the calculated data intuitively visible through digital models, solving the problem that traditional manual engineering quantity statistics are labor-intensive and not conducive to carbon emission reduction optimization analysis.

[0011] Furthermore, step S1 includes dividing the construction process of the large-span spatial steel structure into three stages, namely the component production stage, the component transportation stage and the on-site construction stage, and determining the construction steps of the large-span spatial steel structure.

[0012] By adopting this technical solution, the large-span spatial steel structure is divided into the component production stage, the component transportation stage and the on-site construction stage according to its entire construction carbon emissions, which provides the prerequisites for calculating carbon emissions in stages and reducing carbon emissions in stages. The staged carbon emissions calculation method can increase the accuracy of carbon emissions calculation, and the staged carbon emissions reduction method can increase the effect of carbon emissions reduction.

[0013] Furthermore, step S2 includes establishing a digital model of the large-span space steel structure construction according to the large-span space steel structure system and component types, defining the basic units required for the construction steps, and collecting various parameters of the basic units;

[0014] Basic unit parameters include material type, component type, component quantity, node process and carbon emission factor.

[0015] By adopting this technical solution, basic data is provided for the calculation of carbon emissions at each stage.

[0016] Furthermore, step S3 includes establishing calculation formulas for calculating carbon emissions in the component production stage, component transportation stage, on-site construction stage and summary respectively.

[0017] Furthermore, in step S3,

[0018] The calculation formula for carbon emissions during the component production stage is as follows:

[0019]

[0020] in i is the type of component, F i For components i The corresponding carbon emission factor, M i For components i the number of nis the number of component types involved in the subset;

[0021] The calculation formula for carbon emissions during the component transportation stage is as follows:

[0022]

[0023] in j is the type of component, T j For components j Carbon emission factor corresponding to the mode of transportation, D j For components j Transport distance, M j For components j transportation volume;

[0024] The formula for calculating carbon emissions during the on-site construction phase is as follows:

[0025]

[0026] in k is the category of construction equipment, cf k For construction equipment k Carbon emission factor corresponding to energy consumption, M p It is construction equipment k The amount of work to be completed, M k It is construction equipment k The amount of work completed per unit time, c k It is construction equipment k Energy consumption per unit time;

[0027] The aggregate carbon emissions calculation formula is as follows:

[0028] C wh =C sc +C ys +C sg

[0029] Among them C wh is the total carbon emissions during the construction of large-span steel structures, C cs is the carbon emission during the component production stage, C ys is the carbon emission during the component transportation stage, C sg It is the carbon emissions during the on-site construction phase.

[0030] Furthermore, step S4 includes calculating the carbon emissions of the component production stage, the carbon emissions of the component transportation stage, the carbon emissions of the on-site construction stage and the aggregated carbon emissions according to the calculation formula in step S3 based on the digital model of the large-span spatial steel structure construction.

[0031] By adopting this technical solution, based on the digital model, according to the parameters of the basic unit, the material type, component type, component quantity and carbon emission factor are classified and extracted to calculate the carbon emissions of the component production stage; according to the parameters of the basic unit, the component types are grouped, and the transportation distance of each component type is counted separately to calculate the carbon emissions of the component transportation stage; the construction volume of each construction step is extracted and summarized, and the energy consumption during the construction process of different component types is combined to calculate the carbon emissions of the on-site construction stage; the carbon emissions of each stage are integrated to obtain the aggregated carbon emissions of large-span spatial steel structures.

[0032] Furthermore, step S4 also includes establishing a three-dimensional view based on the digital model, and performing color range rendering in the three-dimensional view according to the ratio status of carbon emissions in each stage.

[0033] By adopting this technical solution, carbon emissions can be displayed intuitively.

[0034] Furthermore, carbon emissions during the component production phase are based on the production of raw materials and the manufacture of different types of components;

[0035] Carbon emissions during the component transportation phase are based on the fuel consumed in transporting the workpieces to the construction site;

[0036] Carbon emissions during the on-site construction phase are based on the fuel and electricity consumed during the building process.

[0037] By adopting this technical solution, the specific factors that produce carbon emissions at each stage are proposed, providing a basis for phased carbon emission reduction.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. Based on CiteSpace, a visual analysis of carbon emissions during the construction of large-span spatial steel structures is conducted, and a calculation method for carbon emissions of large-span spatial steel structures during the construction process is defined. In combination with digital models, carbon emissions are quickly calculated. This can not only quickly obtain relevant carbon emission data to provide a basis for carbon emission reduction optimization analysis, but also make the calculated data intuitive through digital models, solving the problem that traditional manual engineering quantity statistics are labor-intensive and not conducive to carbon emission reduction optimization analysis.

[0040] 2. Define the carbon emission calculation method of large-span spatial steel structures based on the large-span spatial structural system, component type and connection process, and derive the carbon emissions of large-span spatial steel structures more accurately and quickly.

[0041] 3. Leveraging the three-dimensional visualization of digital models, carbon emission results are mapped to colors according to certain rules, and each unit of the digital model of large-span steel structures is rendered to visualize carbon emissions. The carbon emissions per unit volume of steel structure components can be intuitively seen in the digital model, which helps to conduct a comprehensive emission reduction and optimization analysis of carbon emissions throughout the construction process of large-span public buildings and propose specific carbon reduction measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The figure is a schematic diagram of the process of the method for quantitatively calculating carbon emissions from the construction of large-span steel structures and the related carbon reduction process in the present invention;

[0043] Figure 2 This is a schematic diagram of the boundaries of the method for quantitatively calculating carbon emissions from large-span steel structure construction in the present invention;

[0044] Figure 3 This is a schematic diagram of the basic units of the digital model in the method for quantitatively calculating carbon emissions from construction of large-span steel structures in the present invention;

[0045] Figure 4 This is a schematic diagram of the rapid calculation process of the quantitative calculation method for carbon emissions from large-span spatial steel structure construction in the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] Tool Description: CiteSpace refers to literature analysis software; CNKI refers to China National Knowledge Infrastructure; Web of Science refers to the reference indexing database;

[0048] Please refer to the attached Figure 1 The present invention provides a method for quantitatively calculating carbon emissions from large-span steel structure construction. Taking CNKI and Web of Science as data sources, the CiteSpace literature measurement and typical literature mining method are used to conduct a knowledge graph study on relevant literature in the field of carbon emissions from large-span steel structure public buildings, and a multi-dimensional comparative analysis is conducted from the aspects of knowledge base, research hotspots, key factors, and emission reduction measures. The key factors for quantitative calculation of carbon emissions from large-span steel structure public buildings and the emission reduction behaviors that can be implemented are clarified. The method for quantitative calculation of carbon emissions comprises the following steps: S1, clarifying the boundary of carbon emission calculation of large-span steel structure in combination with the large-span structure system; S2, establishing a digital model for large-span steel structure construction; S3, defining a method for calculating carbon emissions from large-span steel structure; S4, rapid calculation of carbon emissions from the entire process of large-span steel structure construction based on the digital model;

[0049] Using CiteSpace, we visualized and analyzed carbon emissions during the construction of large-span steel structures. We also defined a calculation method for carbon emissions during construction, and used digital models to rapidly calculate carbon emissions. This not only enabled rapid acquisition of relevant carbon emission data to support carbon emission reduction optimization analysis, but also made the calculated data intuitively visible through the digital model, resolving the issue of traditional manual engineering quantity statistics, which is labor-intensive and unfavorable for carbon emission reduction optimization analysis.

[0050] Please refer to the attached Figure 2 Step S1 includes clarifying the boundaries of carbon emission calculation for large-span steel structures based on the carbon emission conditions and construction characteristics of the entire construction process of the large-span steel structure, that is, dividing it into three stages: component production stage, component transportation stage, and on-site construction stage. This provides prerequisites for calculating carbon emissions in stages and reducing carbon emissions in stages. The staged carbon emission calculation method can increase the accuracy of carbon emission calculation, and the staged carbon emission reduction method can increase the effect of carbon emission reduction.

[0051] Furthermore, carbon emissions during the component production phase are based on the production of raw materials and the manufacture of different types of components; carbon emissions during the component transportation phase are based on the fuel consumed in transporting the workpieces to the construction site; and carbon emissions during the on-site construction phase are based on the fuel and electricity consumed during the construction process. Specific factors contributing to carbon emissions at each stage are proposed to provide a basis for phased carbon emission reduction.

[0052] Furthermore, the construction steps of large-span space steel structures are divided into five steps: foundation engineering, steel structure installation, roof system installation, exterior protective structure construction, and interior decoration and equipment installation.

[0053] Please refer to the attached Figure 3 Step S2 includes establishing a large-span space steel structure construction digital model based on the large-span space steel structure system and component type, defining the basic units required for the construction steps, and collecting various parameters of the basic units; the basic unit parameters include material type, component type, component quantity, node process and carbon emission factor; improving various relevant parameters in the digital model for subsequent carbon emission calculations, that is, the large-span space steel structure digital model is completed by each basic unit.

[0054] Step S3 includes establishing calculation formulas for carbon emissions in the component production stage, component transportation stage, on-site construction stage, and summary, respectively, to achieve phased carbon emissions calculation;

[0055] Furthermore, in step S3, the carbon emissions calculation formula for the component production stage is as follows:

[0056]

[0057] in i is the type of component, F i For components i The corresponding carbon emission factor, M i For components i the number of n is the number of component types involved in the subset;

[0058] The calculation formula for carbon emissions during the component transportation stage is as follows:

[0059]

[0060] in j is the type of component, T j For components j Carbon emission factor corresponding to the mode of transportation, D j For components j Transport distance, M j For components j transportation volume;

[0061] The formula for calculating carbon emissions during the on-site construction phase is as follows:

[0062]

[0063] in k is the category of construction equipment, cf k For construction equipment k Carbon emission factor corresponding to energy consumption, M p It is construction equipment k The amount of work to be completed (M p For large-span steel structures, the engineering quantity should be determined according to the complexity of the structural system and determined according to the component type and node connection process). k It is construction equipment k The amount of work completed per unit time, c k It is construction equipment k Energy consumption per unit time;

[0064] The aggregate carbon emissions calculation formula is as follows:

[0065] C wh =C sc +C ys +C sg

[0066] Among them C wh is the total carbon emissions during the construction of large-span steel structures, C cs is the carbon emission during the component production stage, C ys is the carbon emission during the component transportation stage, C sgIt is the carbon emissions during the on-site construction phase.

[0067] Please refer to the attached Figure 4 Step S4 includes classifying and extracting various material types, component types, component quantities, and carbon emission factors based on the digital model and the parameters of the basic units to calculate the carbon emissions in the component production stage; grouping the component types according to the parameters of the basic units, and separately counting the transportation distances of each component type to calculate the carbon emissions in the component transportation stage; extracting and summarizing the construction quantities of each construction step, and combining the energy consumption during the construction of different component types to calculate the carbon emissions in the on-site construction stage; integrating the carbon emissions in each stage to obtain the aggregated carbon emissions of the large-span spatial steel structure.

[0068] Step S4 also includes establishing a three-dimensional view based on the digital model, and performing color interval rendering in the three-dimensional view according to the ratio status of carbon emissions in each stage, so that the carbon emissions can be displayed intuitively.

[0069] Continue to refer to the attached Figure 1 Based on this embodiment, a visual analysis of carbon emissions during the construction of large-span steel structures is conducted using CiteSpace, clarifying the feasible emission reduction behaviors in the quantitative calculation of large-span public buildings. With the help of digital models, the carbon emissions of the entire construction process of large-span steel structures are quickly calculated in stages. With the advantage of the digital model's intuitive visualization, phased carbon reduction measures can be further proposed, including carbon reduction measures in the component production stage, carbon reduction measures in the component transportation stage, and carbon reduction measures in the on-site construction stage.

[0070] Carbon reduction measures in the material production stage: increasing the use of green and low-carbon building materials, improving the recycling rate of building materials, selecting renewable building materials, and carbon sequestration and carbon capture in engineering materials;

[0071] Carbon reduction measures during the material transportation phase: reasonable control, optimization of transportation methods (ensuring loading rates, controlling vehicle speeds, using new energy vehicles, etc.), appropriate planning, optimization of transportation distances, energy substitution, and conversion to low-carbon transportation modes;

[0072] Carbon reduction measures during the on-site construction phase: optimize construction machinery, increase the utilization rate of energy-saving machinery, optimize construction methods, improve construction organization design, and improve construction systems.

[0073] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A method for quantitatively calculating carbon emissions during the construction of large-span steel structures. This method uses CiteSpace to visualize carbon emissions during the construction of large-span steel structures and to identify key factors in the quantitative calculation of large-span public buildings. The carbon emission quantification calculation method comprises the following steps: S1. Clarify the boundaries of carbon emission calculations for large-span steel structures in combination with large-span spatial structural systems; S2. Establish a digital model for large-span steel structure construction; S3. Define the calculation method for carbon emissions of large-span steel structures; S4. Rapid calculation of carbon emissions during the entire construction process of large-span spatial steel structures based on digital models.

2. The method for quantitatively calculating carbon emissions from large-span steel structure construction according to claim 1 is characterized by: Step S1 includes dividing the construction process of the large-span spatial steel structure into three stages, namely the component production stage, the component transportation stage and the on-site construction stage, and determining the construction steps of the large-span spatial steel structure.

3. The method for quantitatively calculating carbon emissions from large-span steel structure construction according to claim 2 is characterized by: Step S2 includes establishing a digital model of the large-span space steel structure construction based on the large-span space steel structure system and component types, defining the basic units required for the construction steps, and collecting various parameters of the basic units; Basic unit parameters include material type, component type, component quantity, node process and carbon emission factor.

4. The method for quantitatively calculating carbon emissions from large-span steel structure construction according to claim 3 is characterized by: Step S3 includes establishing calculation formulas for calculating carbon emissions in the component production stage, component transportation stage, on-site construction stage and summary.

5. The method for quantitative calculation of carbon emissions from large-span steel structure construction according to claim 4 is characterized by: In step S3, The calculation formula for carbon emissions during the component production stage is as follows: in i is the type of component, F i For components i The corresponding carbon emission factor, M i For components i the number of n is the number of component types involved in the subset; The calculation formula for carbon emissions during the component transportation stage is as follows: in j is the type of component, T j For components j Carbon emission factor corresponding to the mode of transportation, D j For components j Transport distance, M j For components j transportation volume; The formula for calculating carbon emissions during the on-site construction phase is as follows: in: k is the category of construction equipment, cf k For construction equipment k Carbon emission factor corresponding to energy consumption, M p It is construction equipment k The amount of work to be completed, M k It is construction equipment k The amount of work completed per unit time, c k It is construction equipment k Energy consumption per unit time; The aggregate carbon emissions calculation formula is as follows: C wh =C sc +C ys +C sg Among them C wh is the total carbon emissions during the construction of large-span steel structures, C cs is the carbon emission during the component production stage, C ys is the carbon emission during the component transportation stage, C sg It is the carbon emissions during the on-site construction phase.

6. The method for quantitative calculation of carbon emissions from large-span steel structure construction according to claim 5 is characterized by: Step S4 includes calculating the carbon emissions of the component production stage, the carbon emissions of the component transportation stage, the carbon emissions of the on-site construction stage and the aggregated carbon emissions according to the calculation formula in step S3 based on the digital model of the large-span spatial steel structure construction.

7. The method for quantitative calculation of carbon emissions from large-span steel structure construction according to claim 6 is characterized by: Step S4 also includes establishing a three-dimensional view based on the digital model, and performing color interval rendering in the three-dimensional view according to the ratio status of carbon emissions in each stage.

8. The method for quantitative calculation of carbon emissions from large-span steel structure construction according to claim 4 is characterized by: Carbon emissions during the component production phase are based on the production of raw materials and the manufacture of different types of components; Carbon emissions during the component transportation phase are based on the fuel consumed in transporting the workpieces to the construction site; Carbon emissions during the on-site construction phase are based on the fuel and electricity consumed during the building process.

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