为了对城市建筑的温室气体减排与建筑废弃物的处置和资源化方法的选择提供科学的支撑，基于生命周期评价理论，建立了建筑生命周期碳排放核算方法，分别计算了北京地区某办公和教学用公共建筑的生命周期温室气体排放量，结果显示在50 a的建筑生命周期内，使用阶段温室气体排放分别占总排放量的82%和89%，建材生产阶段分别为17.3%和10.4%.为此，根据北京地区能源结构优化与绿色建筑节能的要求，利用情景分析法，通过模型计算，提出了公用建筑温室气体减排的建议.同时基于我国废弃物处理处置现状，对建筑废弃物处理处置和资源化的不同情景进行了分析，定量核算了不同情景下建筑废弃物处理处置和资源化的温室气体减排量.%In order to reduce the carbon emission from buildings effectively and choice the technique of construction waste disposal and resource appropriately, a calculation method of building carbon emission was built on the basis of life cycle theory, and the carbon emissions of two public buildings in Beijing were quantitatively calculated. The results show that the carbon emission at their using phase accounts for 82% and 89% respectively, and carbon emission at the building material production phase is 17. 3% and 10. 4% respectively during the 50 years of life cycle. Then, according to the optimization of energy structure and green building energy-saving requirements in Beijing, the carbon emission reduction was calculated based on the scenario analysis, and the policy suggestions for reducing the carbon emission in public building areas were put forward. At last, the different scenarios of the construction waste disposal and recycling were analyzed and carbon emission at different scenarios was quantitatively calculated according to the current conditions of waste disposal in China.
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