Measures for improving the resistance of a flatbed protective doorframe wallunder intensive shock loading

Zhao Yuetang; Dong Xiaopeng; Yi Yijun; Chu Cheng

doi:10.11883/1001-1455(2017)03-0487-09

Volume 37 Issue 3

Apr. 2017

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Article Navigation > Explosion And Shock Waves > 2017 > 37(3): 487-495

WANG Ming-yang, ZHENG Da-liang, BAI Xiao-yan. Theoretical study on the perforation of reinforced concrete with back-up steel plate(RCBSP) by projectiles[J]. Explosion And Shock Waves, 2005, 25(4): 289-295. doi: 10.11883/1001-1455(2005)04-0289-07

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Zhao Yuetang, Dong Xiaopeng, Yi Yijun, Chu Cheng. Measures for improving the resistance of a flatbed protective doorframe wallunder intensive shock loading[J]. Explosion And Shock Waves, 2017, 37(3): 487-495. doi: 10.11883/1001-1455(2017)03-0487-09

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Measures for improving the resistance of a flatbed protective doorframe wallunder intensive shock loading

doi: 10.11883/1001-1455(2017)03-0487-09

State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China

Received Date: 2015-09-28
Rev Recd Date: 2016-03-13
Publish Date: 2017-05-25

Abstract

Abstract

Intensive shock loading can lead to obvious stress concentration at the corner of a doorframe and jeopardize the safety of a doorframe wall and even the whole protective structure where it is installed. To solve this problem, we proposed to install a weak layer between the doorframe and the lining to reduce the excessive tensile stress, based on the cantilever beam theory that takes into account the shear deformation. The results show that, as the constraint stiffness of the beam end can influence the structure's failure mode and distribution of the internal force, lowering the constraint stiffness of the beam end can reduce the peak value of the internal force and delay the failure time of the structure. Using the finite element method, we analyzed the influence of the weak layer on the dynamic response and the failure mode of the doorframe. The results show that the weak layer can effectively reduce the stress of the doorframe's corner and the damaging effect of the doorframe wall structure so that the resistance of the doorframe can be improved.
- doorframe wall,
- high impact load,
- weak layer,
- dynamic response

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References

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