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首页> 外文期刊>International journal of steel structures >Probabilistic Distributions of Plate Buckling Strength for Normal and Bridge High-performance Steels
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Probabilistic Distributions of Plate Buckling Strength for Normal and Bridge High-performance Steels

机译：普通和桥梁高性能钢的板屈曲强度的概率分布

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摘要

The probabilistic distributions of buckling strengths for compressive plates of normal and bridge high-performance steels were obtained through numerical analyses in order to develop a nominal design strength and a corresponding safety factor. In the numerical analyses, Monte Carlo simulation was used in combination with the response surface method to reduce the effort associated with the finite element analyses. For each value of the slenderness parameter R, a response surface of the normalized local bucking strength was determined based on the results of 114 finite element analyses using different residual stresses and initial defections. The response surface is approximated as a simple algebraic function of the residual stress and the initial deflection. Monte Carlo simulation is then carried out in order to evaluate the probabilistic distribution of the local bucking strength. The mean values obtained in the present study approach those of a mean curve proposed based on experiments. The standard deviation of the present study was approximately half that obtained based on experimental results in the range of 0.6
机译：通过数值分析获得了普通和桥梁高性能钢的压板的屈曲强度的概率分布，以得出名义设计强度和相应的安全系数。在数值分析中，将蒙特卡洛模拟与响应面方法结合使用，以减少与有限元分析相关的工作量。对于细长参数R的每个值，基于使用不同残余应力和初始缺陷的114个有限元分析的结果，确定了规范化局部屈曲强度的响应面。响应面近似为残余应力和初始挠度的简单代数函数。为了评估局部抗弯强度的概率分布，随后进行了蒙特卡洛模拟。在本研究中获得的平均值接近基于实验提出的平均值曲线的平均值。本研究的标准偏差约为在0.6

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