Field blast test and numerical simulation of ultra-high performance steel fiber reinforced concrete-filled double skin steel tube column under blast loading

Xu Shenchun; Liu Zhongxian; Wu Chengqing

doi:10.11883/1001-1455(2017)04-0649-12

Volume 37 Issue 4

May 2017

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Xu Shenchun, Liu Zhongxian, Wu Chengqing. Field blast test and numerical simulation of ultra-high performance steel fiber reinforced concrete-filled double skin steel tube column under blast loading[J]. Explosion And Shock Waves, 2017, 37(4): 649-660. doi: 10.11883/1001-1455(2017)04-0649-12

Citation:

Xu Shenchun, Liu Zhongxian, Wu Chengqing. Field blast test and numerical simulation of ultra-high performance steel fiber reinforced concrete-filled double skin steel tube column under blast loading[J]. Explosion And Shock Waves, 2017, 37(4): 649-660. doi: 10.11883/1001-1455(2017)04-0649-12

Citation:

Xu Shenchun, Liu Zhongxian, Wu Chengqing. Field blast test and numerical simulation of ultra-high performance steel fiber reinforced concrete-filled double skin steel tube column under blast loading[J]. Explosion And Shock Waves, 2017, 37(4): 649-660. doi: 10.11883/1001-1455(2017)04-0649-12

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Field blast test and numerical simulation of ultra-high performance steel fiber reinforced concrete-filled double skin steel tube column under blast loading

doi: 10.11883/1001-1455(2017)04-0649-12

1.
School of Civil Engineering, Tianjin University, Tianjin 300372, China
2.
Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China

Received Date: 2015-12-28
Rev Recd Date: 2016-05-15
Publish Date: 2017-07-25

Abstract

Abstract

A field blast test including 6 specimens was conducted to investigate the effect of the axial compression ratio, the scaled distance, the hollow ratio and the shape of the facing blasting side on the dynamic response of ultra-high performance steel fiber reinforced concrete-filled double skin steel tube columns (UHPSFRCFDST). Then a three dimensional finite element model (3D FEM) was built using the LS-DYNA software to analyse the dynamic response and damage mechanism of UHPSFRCFDST columns under blast loading, and it was validated by comparison of simulation with blast testing results. Based on this model, the effect of such key parameters as the axial compression ratio, the hollow ratio, the steel ration, the thickness and strength of the inner or outer steel tube, on the blast-resisting performance of UHPSFRCFDST columns was presented. The results indicate that the 3D FEM can accurately describe the dynamic response of UHPSFRCFDST columns under blast loading. The blast-resisting performance of UHPSFRCFDST columns can be improved by increasing the axial compression ratio in a certain range, whereas the damage of the specimens will aggravate when this ratio goes above a critical value. Moreover, the blast-resisting performance of UHPSFRCFDST columns can be enhanced by reducing the hollow ratio or the diameter to thickness ratio of the inner and outer steel tube, and the effect can also be achieved by increasing the steel proportion or the strength of the outer steel tube. However, the strength of the inner steel tube has little effect on the blast-resisting performance of UHPSFRCFDST columns.
- UHPSFRCFDST,
- blast loading,
- blast-resisting performance,
- finite element model

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References

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