工字形钢柱的爆炸作用分布特征与计算研究

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摘要为研究工字形钢柱上的爆炸荷载特征，明确在不同爆炸条件下工字形钢柱的破坏形式,通过数值计算和试验数据相结合,在三种不同爆炸类型条件下，对钢柱不同位置测点的冲击波曲线形式进行分析，并对钢柱不同翼缘的爆炸荷载水平及竖向分布形式进行总结，给出工字形钢柱上爆炸作用的确定方法。研究结果表明：当爆炸作用沿钢柱强轴时，荷载在翼缘宽度上可按均匀分布，而随近、中、远爆炸类型的变化，荷载沿钢柱竖向分别呈双曲线、梯形和矩形分布特征，而荷载峰值可按TM5-855中试验数据确定；当爆炸作用沿钢柱弱轴时，荷载在腹板上可按均匀分布，而在翼缘上呈三角形分布特征，荷载峰值可按TM5-855中试验数据值乘以相应的放大系数得到；爆炸荷载对钢柱响应形式影响显著，随着爆炸距离的增大，钢柱由局部破坏向整体破坏转变。

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	杨涛春
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	陆勇2
	李国强1
	陈素文1

关键词 ：工字形钢柱, 爆炸类型, 爆炸荷载, 荷载分布, 破坏特征

Abstract：To investigate the characteristics of blast loading and the failure mode for I-shaped steel column under different explosion type, numerical calculation and test data are applied together. The time history of overpressure for different measuring points is analyzed in detail. The spatial distribution of blast loading for the steel column is evaluated. The results are showed that load on the flange width, when explosion along strong axis, can be assumed distributed. With the change of near, medium and far explosion type, load along vertical direction of steel columns were hyperbolic, trapezoidal and rectangular distribution respectively. The peak load can be determined according to test data in TM5-855. Load on web, when explosion along weak axis, can be assumed distributed while triangular distribution on flange. The peak load can be determined according to the product of test data in TM5-855 and corresponding amplification factor. The response of steel columns is significantly affected by the characteristic of blast loading. With the increases of explosion distance, local damage transformed to overall failure for the steel column.

Key words： I-shaped steel column；explosion type；blast loading；the distribution of blast loading；failure characteristic

收稿日期: 2014-09-23 出版日期: 2016-02-25

引用本文:

杨涛春,3, 陆勇2,李国强1,陈素文1. 工字形钢柱的爆炸作用分布特征与计算研究[J]. 振动与冲击, 2016, 35(5): 27-38.
YANG Taochun1,3, LU Yong2, LI Guoqiang1, CHEN Suwen1. The distribution and calculation of blast loading for I-shaped steel column subjected to explosion. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(5): 27-38.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I5/27

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