Study On Comprehensive Benefit Of Old Building Reconstruction Model In City Of China

Old building reconstruction is an effective means to realize urban sustainable development. It plays an important role in consummating urban function, improving housing condition of residents, improving housing level, reducing environmental pollution, keeping ecological balance and increasing city benefit. Through intensive and systematic study on the subject, this paper establishes a scientific comprehensive benefit appraisal index system of old building reconstruction in city and determine the weight of each index and grading standard by using analytic hierarchy process and fuzzy comprehensive evaluation. Apply this to the old building reconstruction project of Shenyang city and carry on analysis and test in order to supply scientific evaluation standard and quantitative basis for old building reconstruction benefit evaluation in city.By the deep and systematic research on the principles and methods of the old building reconstruction benefit evaluation in city, this paper considers that the effects of old building reconstruction in city include economic effects,social effects and ecological effects. The evaluation methods should combine quantitative evaluation with qualitative evaluation and macro-analysis with micro-analysis.Among these, economic benefit analysis is an important index to measure city old building reconstruction investment income. The main content is analyzing involvement load and output capacity of old building reconstruction in city, which include annual benefit, static investment recovery period, appending investment profit ratio, investment and other 6 evaluation indexes. Social benefit analysis is a significant index to measure social sustainable development. The main content is the benefits after implementing old building reconstruction by the aspect of improving city modernization level, saving infrastructure construction, improving living standard and quality of life. The concrete content should include the degree of building energy saving, the degree of improvement of production and living conditions, land use capability and other 9 indexes. Ecological benefit analysis is an important index to measure housing sustainable development. The main content is the benefits after implementing old building reconstruction by the aspect of improving building quality, improving working condition and improving humanistic environment etc. The concrete content should include resource-saving level, the new increase of greening area, urbanization level and other 7 indexes.After establishing the comprehensive benefit indexes of old building reconstruction in city, this paper determined the weight of these indexes based on AHP. Then we set down the standard of score according to the actual benefits caused by the variation of every index after old building reconstruction item in city. So we established a scientific, systematic and practical index system and provided scientific evaluation standards and quantitative basis for old building reconstruction in city.After establishing the index system, we have applied this system to the items in Shenyang city in order to check it. By collecting the materials and factual investigation of Shenyang old building reconstruction project, we have obtained data and analyzed these using benefit appraisal index system of old building reconstruction in city, then established different scheme in order to compare analysis model. After reckoning the score of every index and every item, we have found that old building reconstruction items in Shenyang city got very great achievements on increasing the area of cultivated land and improving living conditions, but the disadvantage of single content of old building reconstruction still existed. In a word, there is a great development potential of old building reconstruction in Shenyang city. We should pay more attention to comprehensive treatment and all-round development of old building reconstruction in future work. Through practical test of old building reconstruction project in Shenyang, we have found that the established index system of the old building reconstruction comprehensive evaluation could include almost all contents of the old building reconstruction and reflect the actual effects of the old building reconstruction item accurately and objectively, so it is scientific and maneuverable.