A BIM-based Optimization Calculation For The Auxiliary Material Of Housing Construction And Its Applications

With the rapid development of the national economy,the construction industry has developed into a pillar industry of China's national economy,meanwhile China has the largest real estate market,and thus also has the largest housing market;with the current national economic adjustment,housing market competition is becoming more and more intense,the profit margins of housing construction enterprises are getting lower and lower,the current extensive management of auxiliary materials adopted by housing construction enterprises will result in a large number of waste of auxiliary materials waste and the increase of construction costs,and has become increasingly unable to adapt to the current housing construction market.At the same time the construction industry is a high energy-consuming industry,in order to realize the sustainable development of resources and environment,'green construction' has become the world's consensus and requirements.'Green construction' requires fine Management of auxiliary materials in the construction process to reduce the amount of construction materials and waste.Therefore,aimed at the problems such as the fine calculation,cutting and construction of the auxiliary materials in the process of supporting the construction of the auxiliary materials in the construction industry,and the realization of the meticulous management of the auxiliary materials,this paper studied auxiliary materials calculation method based on BIM technology and proposed a new auxiliary material management model according to this calculation method.The main work of this paper is as follows:According to the characteristics of auxiliary materials construction and application requirements,this paper defines the data format of the BIM model used.The 3D model in the BIM model is represented by the 3D surface model.The attribute data in the BIM model is divided into public and private properties.In order to facilitate the editing and modification and reduce the data redundancy in the BIM model,the spatial data and the attribute data are stored separately,that is to say,the 3D model data and the attribute data are stored separately.The two data are associated with ID.Then,according to the construction characteristics of the main construction stage of the building,the object-oriented parametric modeling method is used to create the BIM model.In this paper,building blocks such as walls,beams,columns and roofs are designed according to the component types.The BIM model of the building component can be created by instantiating the building component object and its spatial position.Then,the automatic modeling method of DWG file is discussed on the basis of object-oriented parametric modeling.By extracting the annotation in DWG and the geometric information,the BIM model is created automatically and finally is utilized to improve the modeling efficiency.This paper discusses the BIM model conversion based on the IFC standard.This paper studies the BIM model calculation method.The effective construction area of the building material auxiliary material construction is firstly calculated based on the created BIM model.Then,the amount of auxiliary materials required for the construction of building component is obtained according to material calculation parameters and calculation rules in the BIM model,and auxiliary materials processing drawings,auxiliary materials,construction drawings and auxiliary materials for the construction of construction enterprises to purchase,processing,and guidance of auxiliary materials construction are subsequently generated.According to the characteristics of auxiliary materials construction management,the generated auxiliary materials,construction drawings and the usage report of auxiliary materials,this paper presents a new auxiliary material management model,which will help the construction process of auxiliary materials.The proposed model divides the construction process of auxiliary material into four stages:the auxiliary material budget procurement stage,the processing storage stage,the distribution stage and the recovery stage.In the budget procurement stage,the auxiliary material calculation method proposed in this paper is used to calculate the auxiliary materials of each construction group accurately,and the management of the calculation method is more close to the actual amount of construction;in the processing and storage stage,according to the auxiliary materials processing drawings,centralized processing of each group of auxiliary materials can effectively reduce the auxiliary materials in the process of reducing the loss of auxiliary materials dosage compared with the original way;in the distribution of the construction phase,the amount of statements and auxiliary materials processing drawings strengthen the supervision of the construction process and guide workers to improve the construction quality and efficiency of the construction;finally in the auxiliary material recovery and replacement stage,the model introduced incentive mechanism to guide Workers fine Refine the construction,saving construction materials.Based on the proposed method of supporting material and management model,Visual Basic is used as the development tool,the SQLite database is used as the database management tool and the OSG(OpenSceneGraph)3D engine is used as the 3D rendering tool to design and develop the auxiliary material calculation software zgBIMs.The system uses a three-tier architecture framework comprised by the presentation layer,the business logic layer and data access layer.The performance layer assists system's UI operation;the business logic layer is responsible for the core business BIM model creation,conversion and auxiliary materials calculation,etc;the data access layer is in charge of system data storage and management.In order to facilitate the user to use,the system provides a good UI design,a common 2D graphics and 3D ink editing function,which achieves the data conversion from the object-oriented parametric modeling method to IFC-based heterogeneous System BIM model,designs the auxiliary materials to calculate the auxiliary materials processing drawings and construction drawings output for the DWG file and outputs auxiliary materials usage report in the form of excel and txt documents.Finally,in order to test the auxiliary materials calculation methods and management models,this paper experimented and applied the bio-integrated experimental building of Shanxi Agricultural University.The experimental results show that our method can be used to calculate the amount of auxiliary materials.The calculation method can solve the increase in construction costs caused by the inaccurate auxiliary material budget.Compared with the existing template management methods in the construction enterprises,the use of auxiliary materials management model management in this paper can effectively reduce the waste in the process,reduce the construction cost,save the material consumption,help the enterprises to realize the fine management of auxiliary materials and the construction enterprises to achieve green construction,and improve the competitiveness of construction enterprises.