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首先介绍了柱段试验的功能和注意事项,强调它不同于短柱试验的特点。其次分析柱段试验提供数据的利用。试验既可显示残余压应力的峰值,也可给出在板件相互约束条件下的局部屈曲稳定系数。对于板件宽厚比超限的柱段,现行的杆件屈曲后强度计算方法给出的承载力高于试验值,应该视为正常现象,否则将不适用于实际应用的压杆。改变这类状况的方法不是对系数取值的修改,而是需要把有效屈服强度系数和杆件长度相联系。最后提出宽厚比超限压杆的相关屈曲法。和试验资料进行对比表明此法比有效屈服点法或有效截面法有很大改进,可以推荐应用于工程设计。
First of all introduced the function and precautions of column test, emphasizing that it is different from the characteristics of short column test. Second analysis of the column test to provide data utilization. The test shows both the peak value of residual compressive stress and the local buckling stability factor under the mutual constraint of plates. For column sections with excess thickness and thickness ratio, the current bearing strength calculation method after buckling gives higher than the test value should be considered as normal, otherwise it will not apply to the practical application of the bar. Instead of modifying the values of the coefficients, the way to change these conditions is to relate the effective yield strength coefficient to the bar length. At last, the related buckling method of aspect ratio bar is put forward. The comparison with the experimental data shows that this method has a great improvement over the effective yield point method or effective section method and can be recommended for engineering design.