Study On BIM Based Life Cycle Assessment Of Environmental Impacts And Decision Making Analysis

With the rapid development of China’s construction industry, continuous expand of the scale of construction market and constant consumption of resource and energy have great effect on environment, as well as constant emission of pollutant, which greatly influence the sustainable development of whole industry and even national economy. In order to achieve low-impact and sustainable development of construction industry and embody the concept of green building, it’s of great significance to conduct a life-cycle environmental impact assessment for construction project.As material basis of a building, building materials and components are closely related to energy and environment during their life-cycle, including manufacturing, construction, operation and demolition. At present, the study on energy consumption and environmental impact control method of building construction using LCA (life-cycle assessment) is the important tool in the field of building energy conservation. Firstly, the paper makes systematic description of development, definition and frame of LCA. The paper suggests a method to use LCA analysis and BIM technology to design 3D BIM models and define the relationship between BIM elements and architecture materials. The method proposed in the paper could analyze quantitatively the environmental impacts and build the index database of project environmental impact assessment using analytical hierarchy process. The design plan of Civil-Traffic Teaching and Research Building in Southeast University is taken as an example to calculate the energy consumption with building information modeling and analyze the key factor of environmental impacts. The paper aims to suggest an integrated solution to LCA based environmental impact assessment of building construction and also provide a theoretical support to the plan optimization in the stage of building design, in order to look for measures to improve building efficiency and create low-impact and low-energy-consumption green building for humans.Conclusion is made at the end of this paper and suggestion and expection for further study are also proposed.