Dynamic response of mesoscopic plain/reinforced concrete slabs under blast loading

SUN Jiachao; CHEN Xiaowei; DENG Yongjun; YAO Yong

doi:10.11883/bzycj-2018-0506

Volume 39 Issue 11

Nov. 2019

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SUN Jiachao, CHEN Xiaowei, DENG Yongjun, YAO Yong. Dynamic response of mesoscopic plain/reinforced concrete slabs under blast loading[J]. Explosion And Shock Waves, 2019, 39(11): 113101. doi: 10.11883/bzycj-2018-0506

Citation:

SUN Jiachao, CHEN Xiaowei, DENG Yongjun, YAO Yong. Dynamic response of mesoscopic plain/reinforced concrete slabs under blast loading[J]. Explosion And Shock Waves, 2019, 39(11): 113101. doi: 10.11883/bzycj-2018-0506

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Dynamic response of mesoscopic plain/reinforced concrete slabs under blast loading

doi: 10.11883/bzycj-2018-0506

SUN Jiachao^1
,,
CHEN Xiaowei^{2, 3
,
,},
DENG Yongjun^{1, 2},
YAO Yong^{1, 2}

1.
School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
2.
Shock and Vibration of Engineering Materials and Structures Key laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
3.
Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China

Received Date: 2018-12-18
Rev Recd Date: 2019-03-07
Publish Date: 2019-11-01

Abstract

Abstract

In order to obtain the effect of meso-structure on plain/reinforced concrete slabs under explosive loading, a meso-structure model of plain/reinforced concrete slabs with stochastic aggregate method was adopted. LS-DYNA was used for numerical simulation of reinforced concrete slabs based on meso-modeling under explosive loading. The accuracy of the meso-modeling method was verified by comparing with the experimental and homogeneous modeling methods. Furthermore, the structural dynamic response of plain/reinforced concrete slabs based on meso-modeling under different explosive loads was studied, and the response process and failure mode of plain/reinforced concrete slabs were obtained. The results show that the meso-structure has little effect on the plain/reinforced concrete slab under low explosive loading (1 kg and 2 kg). The failure mode is mainly based on the vertical and horizontal plastic hinge damage. The larger the dose, the more the hinge line. Comparatively, the meso-structure has a great influence on the plain/reinforced concrete slab under the high explosive load (5 kg, 10 kg and 15 kg), and there is a big difference compared with the homogeneous model. The plain/reinforced concrete slab is centered on the blasting pit and produces circumferential and radial cracks under high explosive loading (5 kg, 10 kg and 15 kg). The larger the dose, the larger the round pit, the more cracks, the more serious the local damage.
- blast load,
- mesoscopic model,
- concrete slab,
- structural dynamic response

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References(14)

References

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