An algorithm for building structural damage under the effect of shock wave

ZHOU Lang; XU Chunguang

doi:10.11883/bzycj-2021-0415

Volume 42 Issue 10

Oct. 2022

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ZHOU Lang, XU Chunguang. An algorithm for building structural damage under the effect of shock wave[J]. Explosion And Shock Waves, 2022, 42(10): 104201. doi: 10.11883/bzycj-2021-0415

Citation:

ZHOU Lang, XU Chunguang. An algorithm for building structural damage under the effect of shock wave[J]. Explosion And Shock Waves, 2022, 42(10): 104201. doi: 10.11883/bzycj-2021-0415

ZHOU Lang, XU Chunguang. An algorithm for building structural damage under the effect of shock wave[J]. Explosion And Shock Waves, 2022, 42(10): 104201. doi: 10.11883/bzycj-2021-0415

Citation:

ZHOU Lang, XU Chunguang. An algorithm for building structural damage under the effect of shock wave[J]. Explosion And Shock Waves, 2022, 42(10): 104201. doi: 10.11883/bzycj-2021-0415

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An algorithm for building structural damage under the effect of shock wave

doi: 10.11883/bzycj-2021-0415

ZHOU Lang,
XU Chunguang^,

School of Aeronautics and Astronautics, SUN YAT-SEN University, Shenzhen 518107, Guangdong, China

Received Date: 2021-09-30
Rev Recd Date: 2022-01-08

Available Online: 2022-09-13

Publish Date: 2022-10-31

Abstract

Abstract

A computational model of simulating the structural damage and the propagation of shock wave was developed in order to study the interaction between blast wave and building. A damage-load criteria of building structures was used to evaluate the destruction of the structure under blast wave, with shock wave impulse used as an indicator of structural failure. Then, the mechanism of the interaction between shock wave and structural fragments was investigated via the simulations of unstructured dynamic grid according to the distribution of pressure field. It has been recognized that there mainly exist three categories of physical effects, i.e., the effect of rarefaction wave caused by the motion of fragments; the impediment effect of structure fragments to shock wave; and the effect of plane wave resulting from the realignment of diffraction wave. Based on the aforementioned analysis, an interface algorithm of fluid-structure coupling was employed to assess the first effect in terms of pressure relief, and “virtual mesh ventilation method” is utilized to deal with the second effect of impediment to shock wave. The results show that the developed model can effectively simulate the propagation of shock wave and reduce the computational cost. Compared to the rigid wall assumptions, the developed model reaches relatively closer agreement with the physical reality. Moreover, the model is simpler and more efficient than the strict coupling method of CSD (computational structural dynamics) / CFD (computational fluid dynamics). Reasonable consistence of the pressure prediction was found between the application of the model and the unstructured dynamic grid simulation. The accuracy, therefore, can meet the engineering requirements. When applied to numerical simulations of the damage process of typical buildings, this model effectively leads to the building damage and shock wave overpressure distributions. The results conform well with the structural damage characteristics, which can provide reference and basis for the damage assessment of explosion shock wave and the building structure.
- fluid-structure coupling,
- damage effect,
- shock wave,
- arbitrary Lagrangian-Eulerian method

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References

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