Economic Analysis For Existing Building Based On LCC Theory

Demolition and construction are indispensable processes of urban development.However, these continuously alternating processes lead to repetitive resources consumptionand repeated environmental pollution. Therefore, it possesses both strong theoreticalsignificance and high practical value to working on this research topic: with the premise ofensuring structural safety of existing buildings, how to reasonably optimize itsfunctionalities, consider its total life cycle, maximize the conservation of resources, protectthe environment and reduce the pollution, in order to achieve a green and low-carbonsustainable social development.In this paper, existing building is economically analyzed based on Life Cycle Cost(LCC) theory. The concept of LCC theory and researches on its applications for existingbuilding are reviewed. To provide theoretical methods for energy-saving reforming projectsof existing buildings, and in combination with a project example, the decision analysis ofwhether to demolish or recycle an existing building is studied with Net Annual Value (NAV)method and fuzzy mathematics theory; the economic life limit of existing building isdiscussed; the estimation model of energy conservation of existing build is established;investment and total life cycle cost of different energy-saving reforming methods areanalyzed. In addition, according to the code for engineering quantity detailed list ofconstruction project, the economical efficiency of recycling existing buildings isdemonstrated through cost analysis of a recycling project of existing primary and middleschools and a similar new construction project and comparison between them based onValue Analysis (VA).At last, some suggestions regarding the suitability of recycling existing buildings areproposed for reference of practice engineers, so as to propel the development of thesuitability of recycling existing buildings, which would promote the sustainabledevelopment of environment and society.