Study on geometric similarity law of steel frame under a far-field explosion load

CHEN Nengxiang; ZHONG Wei; WANG Shufei; YANG Shanglin; TIAN Zhou; OU Xiang; HUANG Huaiwei; YAO Xiaohu

doi:10.11883/bzycj-2021-0498

Volume 43 Issue 1

Jan. 2023

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CHEN Nengxiang, ZHONG Wei, WANG Shufei, YANG Shanglin, TIAN Zhou, OU Xiang, HUANG Huaiwei, YAO Xiaohu. Study on geometric similarity law of steel frame under a far-field explosion load[J]. Explosion And Shock Waves, 2023, 43(1): 013101. doi: 10.11883/bzycj-2021-0498

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Study on geometric similarity law of steel frame under a far-field explosion load

doi: 10.11883/bzycj-2021-0498

1.
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, Guangdong, China
2.
Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China
3.
School of Mathematical Sciences, Peking University, Beijing 100871, China

Received Date: 2021-12-06
Rev Recd Date: 2022-04-12

Available Online: 2022-04-15

Publish Date: 2023-01-05

Abstract

Abstract

According to the Π principle, a similarity law was proposed between the prototype and the scaled-down models of the steel frame under a far-field explosion load. Based on the explosion experiments of steel frame substructures, a numerical model of the substructure was established by AUTODYN to verify the reliability, accuracy, and computational efficiency of the fluid-structure interaction method in the structural explosion response analysis and the analytical blast boundary method by comparing the numerical simulation results with the experiments of the steel frame under the far-field explosion load. The results show that the analytical blast boundary method can reasonably simulate the dynamic response of the steel frame under far-field explosion loads with high computational efficiency. Finally, the dynamic response and damage of a two-story three-span steel frame structure under a far-field explosion load were analyzed by the analytical blast boundary method using different scaling ratios. The results show that when the two-story three-span steel frame is fully scaled according to the geometric similarity ratio, the dynamic displacement responses of the prototype and the scaled-down models of the steel frame under the far-field explosion load are similar. And the damage effects of the prototype and the scaled-down models based on the assessment index of interlayer displacement angle are similar.
- similarity law,
- steel frame,
- far-field explosion,
- dynamic response

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References

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