Abstract
Keyword: The average service life, Questionnaire survey, Principal components analysis Abstract: At present, China's residential average life is less than 30 years, far below the standard design life of 50 years, and the residential life in developed countries generally up to 80 years. Our residential life is so short that gives our country's construction and economic development a lot of negative factors. This paper focuses on the average service life of existing housing, using questionnaires survey and principal component analysis analyzes the factors that affect the average life.
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