超高層建筑費用估算及全壽命周期費用優(yōu)化
[Abstract]:Super tall buildings have the characteristics of large volume, complex function and high investment quota, and their economy is highly valued by the government and investors. Therefore, it is of great significance to estimate the investment cost of super high-rise building in the early stage of project establishment, and to study the composition and optimization of the cost of super high-rise building from the point of view of the whole life cycle. In this paper, the whole life cycle cost of super high-rise building is studied. Firstly, the composition of life cycle cost suitable for super high-rise building is put forward, and the GA-BP algorithm is extended to estimate the cost of super high-rise building construction period for the first time. Then the cost of the construction period is optimized by the trial compression key line method. Finally, the calculation method of the operating period cost and the income is established, and the dynamic optimization model of the whole life cycle cost is put forward. The main contents of this paper are as follows: firstly, this paper presents the research steps and cost composition models of life-cycle cost for super high-rise buildings, and analyzes the cost components of each period of the life cycle in detail. Secondly, aiming at the characteristics of complex cost composition, large investment and high degree of attention in the construction period of super high-rise building, this paper proposes to extend the genetic algorithm optimized BP neural network to the cost estimation of super high-rise building construction period for the first time. The MATLAB software is used to compile the GA-BP algorithm program which is suitable for the cost estimation of the super high-rise building during the construction period. Compared with the test results of BP neural network, the results show that the proposed GA-BP algorithm program is more reliable and accurate in estimating the construction cost of super high-rise building. Then, the paper optimizes the cost of the construction period by using the compression key line method, and obtains the method of determining the cost and income of the operation period by analyzing the relationship between the cost of the construction period and the operating period. Based on the theory of capital time value, a dynamic optimization model of total life cycle cost (LCC) with the goal of financial net present value (FNPV) is established, and the optimal life-cycle cost scheme is selected. Finally, taking a super high-rise building as a case study, the analysis results show that the optimal scheme selected by the dynamic optimization model of life cycle cost proposed in this paper can save a large amount of cost under a reasonable construction period. The rationality and economy of the optimization model are verified.
【學位授予單位】:長安大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TU974;TU723.3
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