Dynamic Simulation And Fuzzy Comprehensive Optimization For Super High-rise Building Construction Operations

The construction of super high-rise building is a rather complicated system. The parts of the system are not only related with each other, but also restricted with each other, and the relationship of them is anfractuous. With the expansion of the scale and complex structure for projects, it is more difficult for construction scheduling control and management of super high-rise building. In this paper, many theories including dynamic construction simulation, construction scheduling control and fuzzy comprehensive optimization technology, are introduced into construction design of super high-rise building. Theoretical Study and application of dynamic simulation and fuzzy comprehensive optimization for super high-rise building construction operations is presented. Multi-scheme optimization for simulation parameters is studied with dynamic change of construction operation procedure, resource allocation, balance between risk and investment. Reasonable construction schedule is presented, and construction process is analyzed by means of dynamic visualization, which provides theoretical foundation and technical support for construction design and management of super high-rise building.The main research contents and achievements of the thesis are as follows:(1) Aiming at the complicated structure and construction operation procedure of super high-rise building, methodology of construction dynamic visual simulation for super high-rise building is proposed. The modeling method and simulation technology are presented, by considering the particularity of construction operations for super high-rise building. Technology of construction dynamic visual simulation is studied, so that construction simulation results can be understood more intuitively.(2) Fuzzy comprehensive optimization for construction scheduling is studied, with the most appropriate combination of risk and investment. Considering the influence of interest rates and inflation, rish and investment with different unit, and the characteristic of fuzzy goals for investment, the fuzzy comprehensive optimization model of construction scheduling, with the most appropriate combination of risk and investment, is presented. Comprehensive optimization method based on Vague Sets is proposed, and membership function of Vague Sets is applied to measure the effectivity of investment and risk on decision target. Genetic Algorithms is used in solving the model, which becomes an effective way to solve the problem of construction scheduling optimization. (3) The element of safety is introduced into comprehensive optimization of time, cost and quality. By considering the four targets of construction, which are time, cost, quality and safety, fuzzy mulit-attribute optimal membership degree is defined and evaluated with intuitionistic fuzzy sets. The fuzzy group decision model of construction schemes, considering time, cost, quality and safety, is presented. Genetic Algorithms is used in solving the model, and the elements of time, cost, quality and safety are obtained with the best combination. The results can be applied to assist in scheduling arrangement and the choice of modes for costruction operations, which can be valuable.(4) With the theories mentioned above, and considering all kinds of factors, the modeling and construction simulation for Dikai International Center super high-rise building is carried out. Multi-scheme optimization for simulation parameters is studied with dynamic change of construction operation procedure, resource allocation, balance between risk and investment. According to the optimized parameters, reasonable construction schedule, critical paths and time limit of the project are presented, which provide scientific basis for reasonable arrangement of construction scheduling.