随机制作偏差影响下的网架结构性能分析
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建设部钢结构CAD件开发(03509)


Property Analysis of Grids Structures with Random Manufacturing Deviation
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    摘要:

    假定网架结构制作偏差近似服从正态随机分布,利用舍选法实现了正态随机变量的抽样。采用空间有限元和概率方法,分析了网架结构由于制作偏差引起的初始应力和初始位移。正交正放四角锥网架的算例结果表明,随机制作偏差可以引起的较大的初始应力,使得网架结构局部杆件发生失稳破坏,从而对结构的承载力有较大影响,不容忽视。提出的思路和方法对空间网架结构的设计以及制作加工都具有指导意义。

    Abstract:

    The manufacturing deviation of grids structures was assumed to be in normal distribution, and the normal random sampling was realized by acceptancerejection method. Based on the finite element method and probability method, the initial displacement and stress of grids structures due to manufacturing deviation were analyzed. Numerical example showed that the random manufacturing deviation produced large initial stress, which induced buckling failure of some spatial grid members, and had a large effect on the safety of the grids structures and could not be ignored. It also showed that the method obtained had guiding significance for the design and fabrication of grids structures.

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张慎,杜新喜,万金国.随机制作偏差影响下的网架结构性能分析[J].土木与环境工程学报(中英文),2009,31(2):8-2.

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