Construction and Empirical Study of the Quantitative Model of the Whole Process of Building Carbon Emissions

To enable systematic quantification and effective control of carbon emissions in the construction industry, this paper proposes a life cycle-based carbon emission model. Grounded in LCA principles, the model spans four stages: material production, construction, operation, and demolition. It integrates phased accounting with unified aggregation to ensure a closed-loop calculation process. Parameters are derived from the Building Carbon Emission Calculation Standard and the China Life Cycle Database (CLCD). Empirical validation on public buildings in Shanghai demonstrates the models stability and its ability to identify high-emission stages and optimization opportunities. The model proves applicable to carbon verification, green building evaluation, and full-process carbon management, showing strong practical value and scalability.