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학위논문 동서

高層事務所 建物의 工事費 豫測을 위나 混合型 技法 開發에 관하 硏究

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부산: 東亞大學校 1995. -

192장: 삽도; 28cm. -

학위논문(석사)- 동아대학교 대학원 건축공학과 전공 1995년12월

영문초록 : When the construction cost as an approximated actual cost is promptly forecasted by a simple information in an architectural planning and design stage, particularly at early stage, clients can easily draw up accurate budget and designers can determine an optimum alternative of planning by the control of construction cost in making-decision process. In this point the developed countries have practically used the forecasting method of construction cost adapting national codes, but the domestic country have predicted the approximated construction cost by designer's experiences and the previous data. Recently the forecasting method of construction cost was proposed by a regression analysis in apartment house which has an advantage of standardization and simplification, but there is no tlne forecasting method of construction cost in office buildings having many variation of cost. Therefore, this research was aimed at reasonable of forecasting the construction cost of multi-story office buildings in architectural planning and design stage and development of the hybrid cost forecasting method to examine an exact cost in contract and construction management phase. The results obtained from this research were as follows ; 1. The component ratio of construction cost by work trade was verified by standard cost weight calculation, it was a valid standard data for forecasting construction cost. 2. Machanical equipment construction cost proved to be increased and architectural construction cost decreased as the number of stories above ground, which was the principal factor influencing the component ratio of construction cost by classification in main items, increased. 3. Primary factors influencing in the component ratio of architectural construction cost were the number of the stories below ground concerned with earthwork having a large variable coefficient with high the component ratio of cost, formwork method in reinforced concrete work and external finishing material in finishing work. 4. As a result of calculating the structural materials quantity per unit floor area, the architectural mean method resulted fewer an error than the regression method. The values were as follows ; (1) Concrete : 0.502 ㎥/㎡ (2) Form : 2.871 ㎥/㎡ (3) Steel bar : 0.050 ton/㎡ (4) Steel : 0.043 ton/㎡ 5. As a result of applying the standard weight variation index method by conditions to the hybrid cost forecasting method, an error in actual construction cost could be minimized. 6. To enhance the application and efficiency of operation, the hybrid cost forecasting method was designed in software program. 7. As the result of implementing the model to confirm the validity of the hybrid cost forecasting method developed in this research, below 10% difference were observed in total construction cost, which would be considered comparatively exact results at the early planning stage. So the hybrid cost forecasting method was verified the validity forecasting method of construction cost in the multi-story office buildings having many variations of cost.

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