Research On Digital Optimization And Simulation Of Construction Scheme Of A Large-span Steel Structure Project Under The Background Of "Double Carbon" Drive

In recent years,based on the substantial improvement in the quality of engineering construction technology and the deepening reform of the green building engineering industry,China’s large-scale steel structure projects have gradually ushered in a new round of development opportunities.Complexity is also one of the new directions for the development of public buildings in China.Compared with traditional structural forms,its components are bulky and complex in structure.Therefore,this also poses a new problem for each stage of its life cycle.From the perspective of the construction stage of large-span steel members,how to carry out scientific and reasonable construction control,fully consider the construction mechanics of large-span steel members,propose scientific and reasonable construction methods,and carry out unified organization,management and coordination of the entire construction process need to be improved.The original building structure construction management strategy based on experience has long been unable to meet the quantitative and refined requirements in the construction control process of special steel structure projects.At this stage,Building Information Modeling(BIM),a derivative masterpiece of information management in the whole life cycle of buildings,has been widely and deeply applied in various building products.This paper,from the standpoint of the construction side,constructs the application of BIM technology in the construction of large-span steel structures.The application system in process management and control,and according to the implementation of such structures in the construction process,the application of BIM technology in the comprehensive management and control of the construction process of related projects is explored.This paper focuses on the following aspects of research: referring to the relevant literature,the theory and key technology of BIM research,the characteristics of existing large-span steel structure engineering and the research status of major countries in the world are analyzed,and the key technology of BIM and this kind of technology are systematically expounded.The importance and necessity of organic integration of management and control in the construction phase;according to the global research status of large-span steel structures,the concept and characteristics are systematically summarized,and the construction technology,construction methods and technical essentials of commonly used large-span steel structures are discussed in detail,and supplemented by actual cases for verification,and strive to provide theoretical basis and practical reference for choosing the most reasonable construction method in the construction process.Based on the engineering system analysis and optimization theory,and using actual construction cases,a detailed technical and economic analysis of the construction methods of common large-span steel structures is carried out,thus forming an index system for the construction methods of large-span steel structures;the most commonly used options are analyzed.Decision-making method,according to the pros and cons of different methods and engineering practice,the entropy weight method,the grey relational method and the Vague set are used to form a comprehensive evaluation model.The advantage of the correlation method in the study of uncertain systems is to seek the degree of numerical correlation between different influencing factors;in addition,the Vague set is an optimization of the fuzzy set,and has dual membership degrees,so the evaluation is more reasonable;comprehensively select the above optimization methods,and then Expand the arguments in order of priority,and finally get the conclusion of the overall comprehensive evaluation.In order to solve the problem more conveniently,a solving program is specially written in Matlab language to assist the decision-making process,so as to achieve the final goal of optimizing the construction method of largespan steel structure.Aiming at the problem of digital optimization of the construction scheme of a large-span steel structure project,through the establishment of a parametric model,the key construction process is reengineered,and the optimal scheme is numerically simulated and verified.The construction process is simulated and deduced,and scientific decision-making is carried out.