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异形建筑结构施工过程存在诸多不确定的影响因素,从概率的角度研究其随机性有重要的工程意义。由于异形建筑结构竣工时的内力状态和几何线型与结构的施工过程密切相关,有限元仿真分析时需引入正装计算方法考虑其施工过程的影响,仿真分析计算规模庞大,从而使摄动法及蒙特卡罗法等常用的结构随机分析方法难以有效应用到大型复杂结构施工过程概率分析中。有鉴于此,综合运用施工过程仿真分析方法、响应面拟合技术及蒙特卡罗法,为大型复杂结构施工过程概率分析提供一种有效分析方法,相对于传统的蒙特卡罗法其计算量大幅减小,同时,其精度也能满足工程应用的需求。把该方法应用于大型复杂异形建筑——广州图书馆施工控制中,获得了合理的结构状态概率统计规律,验证了该方法的可行性与有效性。
There are many uncertain factors in the process of construction of profiled buildings. It is of great significance to study the randomness from the perspective of probability. Due to the close relationship between the internal force state and the geometric line shape and the construction process of the structure when the special-shaped building is completed, the formal calculation method should be introduced to consider the influence of the construction process when the finite element simulation analysis is carried out. The simulation analysis and calculation is of large scale, Stochastic analysis methods such as Monte-Carlo method, which are commonly used, are difficult to effectively apply to the probability analysis of the construction process of large and complex structures. In view of this, the comprehensive application of construction process simulation analysis method, response surface fitting technique and Monte Carlo method provides an effective analysis method for the probability analysis of large complex structures during the construction process. Comparing with the traditional Monte Carlo method, Reduce, at the same time, its accuracy can also meet the needs of engineering applications. The method is applied to the construction control of large-scale and complex shaped building in Guangzhou Library, and a reasonable statistic rule of structure state probability is obtained, which verifies the feasibility and effectiveness of the method.