Study On Synthetic Evaluation Of Existing Buildings

Buildings provide us space of working and living, forming the foundation of human being's existing and development. Because of different reasons, to some extent, existing buildings have certain problems more or less; and some problems are very serious. So at present, the way of evaluating existing buildings in an integrated, comprehensive and reasonable manner become more incumbent.For evaluation of the existing buildings, many domestic scholars and those abroad have made many researches and experience in practice which lack of comprehensive evaluation index system, and these evaluations are mainly focused on a particular aspect of building, for example: building materials, built environment, building quality, groundsill, esthetics appraisal, and so on. But a reasonable evaluation for existing buildings does not merely concentrate on one aspect of buildings, it should be a comprehensive evaluation to provide as far as possible accurate reference for the building maintenance or the possible reform.On the basis of the value of buildings, this paper proposed a synthetic evaluation multilevel index system for existing buildings, it contains 7 Level 1 indicators including humanistic, environmental, cultural, aesthetical, economical, technological and safety aspects, and 27 Level 2 indicators, further more, extending the present evaluations from merely technical aspects to the harmonically combination of building with society, environment and human being.Based on the method of synthetic evaluation and the model of evaluation, this paper discussed the suitable methods for determining the synthetic evaluation index weighing. Meanwhile, it also studied the basic principles and the methods applied the Analytical Hierarchy Process (AHP) and the fuzzy integration method of synthetic evaluation to existing buildings, proposing a fuzzy integration method of synthetic evaluation for existing buildings and presenting the fuzzy integration method of synthetic evaluation process and formulas, additionally, the application of the proposed method was demonstrated through an example of an industrial building plant.