Q460高强钢柱在近爆荷载作用下的动力响应研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (3) : 107-114.

论文

张秀华1，张唯佳1，张宇2

作者信息 +

Dynamic response of Q460 high strength steel column under near explosion load

ZHANG Xiuhua1, ZHANG Weijia1, ZHANG Yu2

Author information +

文章历史 +

摘要

采用有限元软件ANSYS/LS-DYNA，建立钢柱有限元模型，运用流固耦合计算方法，模拟Q460高强钢柱在爆炸荷载作用下的动力响应，在此基础上提出了分段等效三角波计算方法对结构/构件施加爆炸荷载，并对影响钢柱动力响应的主要因素进行数值分析。结果表明：分段等效三角波计算方法和流固耦合方法计算吻合较好，验证了分段等效三角波计算方法的可行性。爆炸冲击波速度快，荷载峰值大，持续时间短，对钢柱的破坏力极强；钢材强度等级越大，钢柱抵抗变形的能力越强；炸药位置越低，柱脚越容易发生剪切破坏；翼缘作为迎爆面更能抵抗爆炸冲击的作用；适当减小翼缘和腹板的宽厚比能增强钢柱抵抗动力荷载的能力。提出的分段等效三角波计算方法为研究抗爆提供进一步参考。

Abstract

The finite element models of steel column were established by ANSYS/LS-DYNA.The dynamic responses of Q460 high strength steel columns under explosion load were simulated by fluid-solid coupling method. On the basis,a piecewise equivalent triangular wave calculation method is proposed to apply explosive load to the structure/member, and the major influencing factors were numerically analyzed.The results show that the piecewise equivalent triangular wave calculation method is in good agreement with the fluid-solid coupling method, and the feasibility of that is verified. The blast wave with high velocity, high peak load and short duration has strong destructive force on the steel column. The greater the steel strength grade, the stronger the steel column's ability to resist deformation. The lower the explosive position,the easier the shear failure of the column foot. The flange, as the blasting surface, is more resistant to explosion shock. Properly reducing the width to thickness ratio of flange and web can enhance the ability of steel column to resist dynamic load.The piecewise equivalent triangular wave calculation method can provide further reference for the study of explosion resistance.

导出引用

张秀华1，张唯佳1，张宇2. Q460高强钢柱在近爆荷载作用下的动力响应研究[J]. 振动与冲击, 2022, 41(3): 107-114

ZHANG Xiuhua1, ZHANG Weijia1, ZHANG Yu2. Dynamic response of Q460 high strength steel column under near explosion load[J]. Journal of Vibration and Shock, 2022, 41(3): 107-114

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