超高层建筑结构优化过程中的环境成本计算

近年来中国大陆掀起了超高层建筑的兴建热潮。超高层建筑体量巨大，其碳排放和能源消耗对环境有显著影响。在评估和优化超高层建筑的全生命周期环境成本时，提出了一个全新的全生命周期模型。新模型有两大特征：首先，同时考虑了建筑材料的空间分布与时间特征；其次，把单尺度生命周期概念拓展到多尺度生命周期概念，以从更多角度来研究碳排放情况。建立了一个基准超高层建筑模型来阐释对新模型的应用。根据初步研究结果，应用新方法可以选择出更优化的结构设计方法，以最大程度减少碳排放量。

Calculation of environmental cost in the structural optimization of super tall buildings

Chinese mainland has seen a rapid construction speed of super tall buildings in recent years. Due to its huge quantity material and energy assumption, the super tall buildings exert great impact on the environment. An innovative new life cycle model is proposed for assess and optimize the life cycle environmental cost of super tall buildings. The new life cycle model has two features. Firstly the space distribution of the building materials is considered besides the time dimension, and secondly the single life cycle concept is extended to multiple life cycles to investigate the carbon footprint from the perspective of more than one life cycle. A benchmark super tall building is established to illustrate the application of the proposed new life cycle model. According to the case study results, a remarkable difference would be made in carbon emissions if the life cycle environmental cost based structural optimization method could be applied.