CAJ | 학술논문

对薄壁梁在轴向压力和弯矩联合作用下产生的弯曲和轴向压溃两种变形模式进行了理论分析，研究了其对应的载荷条件，并建立了薄壁梁的有限元模型，对理论分析结果进行了数值验证和进一步的探究。结果表明，对于受压、弯组合载荷作用的薄壁梁，当截面所受弯矩小于其截面极限弯矩的15%时，可以避免弯曲变形而只产生轴向压溃；合理的诱导可有效地避免弯曲的产生。
대박벽량재축향압력화만구연합작용하산생적만곡화축향압궤량충변형모식진행료이론분석，연구료기대응적재하조건，병건립료박벽량적유한원모형，대이론분석결과진행료수치험증화진일보적탐구。결과표명，대우수압、만조합재하작용적박벽량，당절면소수만구소우기절면겁한만구적15%시，가이피면만곡변형이지산생축향압궤；합리적유도가유효지피면만곡적산생。
The bending and axial collapse two deformation modes of thin-walled columns under the coac-tions of axial compression and bending moment are theoretically analyzed. Its corresponding loading conditions are studied, a FE model for thin-walled column is built, and the numerical validation of theoretical analysis results and further investigation are conducted. The results showed that for thin-walled column subjected to both axial compres-sion and bending moment, when its bending moment of cross section is less than 15% of its ultimate bending mo-ment, only axial collapse happens without bending deformation, and some structural detail like notch can effectively avoid the occurrence of bending.