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研究了部分填充加气混凝土对薄壁圆柱形壳屈曲性能的影响。以往的研究大多局限于100%填充或简单地选定填充混凝土的厚度。这种做法对结构设计并不适宜。为了进一步研究此问题,用瑞利-里兹逼近算法进行理论分析,并提出了能计算从0%填充到100%填充的壳的临界屈曲应力的公式。使用此公式的计算结果与文献的试验结果能良好地吻合。研究表明在薄壁圆柱形壳内填充加气混凝土能提高构件的屈曲强度。同时,提出了一个适用于工程设计的简化公式。研究表明,当加气混凝土厚度超过10%的外壁半径时,增加混凝土用量的经济性较差。
The effect of partially filled aerated concrete on the buckling behavior of thin-walled cylindrical shells was investigated. Most previous studies have been limited to 100% fill or simply select the thickness of filled concrete. This approach is not suitable for structural design. In order to further study this problem, a theoretical analysis is made using the Rayleigh-Ritz approximation algorithm and a formula for calculating the critical buckling stress of a shell filled from 0% to 100% is proposed. The calculation results using this formula are in good agreement with the experimental results in the literature. Studies have shown that aerated concrete filled in thin-walled cylindrical shells can improve the buckling strength of members. At the same time, a simplified formula for engineering design is proposed. Research shows that when the aerated concrete thickness exceeds 10% of the outer wall radius, increasing the amount of concrete is less economical.