Damage grades of reinforced concrete bent structures against blast

ZHANG Di; YANG Jun; ZENG Dan; CHEN Tainian; GAO Jinming; TANG Yu

doi:10.11883/bzycj-2020-0012

Volume 40 Issue 12

Dec. 2020

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ZHANG Di, YANG Jun, ZENG Dan, CHEN Tainian, GAO Jinming, TANG Yu. Damage grades of reinforced concrete bent structures against blast[J]. Explosion And Shock Waves, 2020, 40(12): 121405. doi: 10.11883/bzycj-2020-0012

ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

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Damage grades of reinforced concrete bent structures against blast

doi: 10.11883/bzycj-2020-0012

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
2.
China Ordnance Engineering and Safety Technology Research Institute, Beijing 100053, China

Received Date: 2020-01-07
Rev Recd Date: 2020-05-21
Publish Date: 2020-12-05

Abstract

Abstract

To study the failure law of reinforced concrete bent structures under large equivalent explosions, the damage grades of the bent structures against blast were numerically calculated based on the explosion test with the maximum equivalent of 3 t TNT. The load parameters and structural dimensions of the 1/2 scaled model were obtained through dimensional analysis. Based on the Abaqus finite element software, the CONWEP method was used to achieve the blast loading. The failure modes of the structures, under the explosion loads with TNT equivalent 0.5 t and blast distance 33 m as well as TNT equivalent 3 t and blast distance 33 m, were calculated, respectively, and compared with the test results. Further, the failure patterns of the scale model under different overpressures and impulses were calculated by controlling the TNT equivalent and blast distance. The research results show that the middle column of the bent structure is prone to damage in the form of overall overturning under a lateral blast load; the calculated failure morphologies are in good agreement with the experimental ones, and the maximum relative errors of the characteristic displacements and characteristic corners are 5.6% and 4.6%, respectively. The overturning angle of the load-bearing column was used as the basis for the damage-grade division, and the calculated results were divided into three damage levels. The fitted overpressure-impulse and equivalent-distance curves can be used in the design of safety distance and warehouse capacity and the estimation of the damage degree of accidental explosion.
- reinforced concrete bent structure,
- blast,
- damage grade,
- overpressure-impulse curve,
- scaled model,
- CONWEP

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References(25)

References

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