Buckling of piecewise member composed of steel and high-strength materials in axial compression
Buckling of piecewise member composed of steel and high-strength materials in axial compression
复制标题
钢与高强材料分段构件轴压屈曲
DOI：
10.1016/j.tws.2016.10.008
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发表时间：
2017-01-01
影响因子：
6.4
通讯作者：
Gong, Da
中科院分区：
文献类型：
--
作者：
Feng, Peng;Zhang, Yanhua;Gong, Da
基于微分元法，推导了轴向压缩分段构件在各种理想边界条件下的弹性屈曲载荷；然后，将结果简化为对称构件。理论计算结果与已有的均匀构件弹性屈曲载荷计算公式一致。然后，研究了由钢和弹性材料组成的轴向压缩分段构件的弹塑性屈曲，发现其与纯钢构件的弹塑性屈曲有很大的不同，并提出了理论分析方法。在弹塑性屈曲分析中，考虑初始缺陷和钢的硬化，确定了钢截面在极限状态下的承载能力。基于临界截面极限状态，给出了该构件承载力的对称求解方法，该方法简单、易于设计修复。弹塑性屈曲分析的理论结果与实验结果一致，平均误差为4%。
The elastic buckling load of an axially compressed piecewise member was derived under various ideal boundary conditions based on the differential element method; then, the result was simplified for a symmetrical member. The theoretical results were found to be consistent with existing formulas for the elastic buckling load of uniform members. Then, the elasto-plastic buckling of an axially compressed piecewise member composed of steel and elastic materials was investigated and found to be quite different from that of a pure steel member, and a theoretical analysis approach was developed. In elasto-plastic buckling analysis, the load-bearing capacity of the steel section in the ultimate state is determined considering initial imperfections and steel hardening. Furthermore, the symmetric method for obtaining the load-bearing capacity of this member was obtained based on the ultimate state of the critical section, which is simple and reparative for design. The theoretical results of the elasto-plastic buckling analysis were consistent with experimental results, therein obtaining an average error of 4%.