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倾斜荷载作用下薄壁结构常按照欧拉屈曲模式破坏。这种类型的破坏结构其能量耗散能力和耗能效率较低,可利用破坏诱因提高这些能力。采用试验和数值模拟方法,研究了破坏诱因对倾斜准静态荷载作用下方钢管的能量耗散性能的影响,对钢管的转角进行削切形成诱因。结果显示,大多数试样的破坏诱因改变了各类屈曲(由一般屈曲至渐进屈曲)的变形模式,使峰值荷载大幅减小,从而提高了耗能效率。此外,研究了诱因位置和数量的影响。其数值分析结果与试验数据相吻合。
Thin-walled structures are often damaged by the Eulerian buckling mode under oblique loading. This type of destructive structure has low energy dissipation and energy efficiency and can be exploited to induce these abilities to improve. The influence of failure inducing factor on the energy dissipation performance of the steel tube under the inclined quasi-static load was studied by means of the experiment and the numerical simulation method, and the cause of the cutting of the steel tube was cut off. The results show that the failure inducement of most specimens changed the deformation modes of all kinds of buckling (from general buckling to progressive buckling), which greatly reduced the peak load and improved the energy consumption efficiency. In addition, the effect of location and number of inducers was studied. The numerical analysis coincides with the experimental data.