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在主流的铝合金结构设计规范中,受压板件局部稳定承载力的计算方法主要有以下几类:有效截面法、许用应力法、抗力系数设计法/极限状态设计法。现有的研究成果表明,这些计算方法均低估了非加劲板件的承载力、高估了加劲板件的承载力,导致计算结果不准确。对266个十字形截面、259个箱形截面和168个工字形截面短柱进行有限元分析,并考虑了现有的71组试验结果,给出不考虑板件间相互作用的有效厚度计算公式。研究结果表明,给出的建议公式能够较准确地计算板件的有效厚度,可以应用在工程设计中。
In the mainstream of aluminum alloy structural design specifications, the compressive plate local stability bearing capacity of the calculation methods are the following categories: effective cross-section method, allowable stress method, resistance coefficient design method / limit state design method. The existing research results show that these methods all underestimate the bearing capacity of non-stiffened plates and overestimate the bearing capacity of stiffened plates, resulting in inaccurate results. A total of 266 cross-section, 259 box-section and 168 I-section short columns were analyzed by finite element method, and the existing 71 groups of test results were taken into account. The effective thickness calculation formula without considering the interaction between plates was given . The results show that the proposed formula can calculate the effective thickness of the plate more accurately and can be applied in engineering design.