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Experimental investigation on dynamic response and damage models of circular RC columns subjected to underwater explosions

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Defence Technology（防务技术） 2020年第4期16卷 856-875页

作者： Tie-shuan Zhuang Ming-yang Wang Jun Wu Cheng-yu Yang Tao Zhang Chao Gao State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact Army Engineering University of PLANanjing210007China Research Institute for National Defense Engineering of Academy of Military Science PLALuoyang471023China

Reinforced concrete(RC) columns are widely used as supporting structures for high-piled *** study of damage model of a RC column due to underwater explosion is a critical issue to assess the wharfs antiknock *** this study,the dynamic response and damage model of circular RC columns subjected to underwater explosions were investigated by means of scaled-down experiment *** were carried out in a 10.0 m diameter tank with the water depth of 2.25 m,under different explosive quantities(0.025 kg-1.6 kg),stand-off distances(0.0 m-7.0 m),and detonation depths(0.25 m-2.0 m).The shock wave load and dynamic response of experiment models were measured by configuring sensors of pressure,acceleration,strain,and ***,the load distribution characteristics,time history of test data,and damage models related to present conditions were obtained and *** damage models,including bending failure,bending-shear failure and punching failure,were *** addition,the experie nce model of shock wave loads on the surface of a RC column was proposed for engineering application.

关键词： Underwater explosion Reinforced concrete(RC)columns Load distribution characteristics Dynamic response damage models

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The dynamic response and damage models of rebar reinforced polymer slabs subjected to contact and near-field explosions

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Defence Technology（防务技术） 2023年第10期28卷 330-342页

作者： Hao-nan Zhao Hong-yuan Fang Xiao-hua Zhao Yellow River Laboratory Zhengzhou UniversityZhengzhou450001China

Non aqueous reactive polymer materials produced by the reaction of isocyanate and polyol have been widely used in infrastructure construction,which may be subjected to explosion loads during complex service *** blast response of composite materials is a crucial aspect for applications in engineering structures potentially subjected to extreme *** this work,damage caused to rebar reinforced polymer slabs by surface explosive charges was studied experimentally and numerically.A total of 6 field tests were carried out to investigate the performances of the failure modes of rebar reinforced polymer slabs under contact and near-field *** influence of explosive quantity(10-40 g)and stand-off distances(0-20 cm)at the damage modes were *** results show that the failure modes of rebar reinforced polymer slabs under near-field explosion mainly were bending and surface spalling,while under the impact of contact explosion,the failure modes were craters of the top surface,spalling of the bottom surface,and middle ***,a detailed fully coupled model was developed and validated with the test *** influences of explosive quantity and slab thickness on rebar reinforced polymer slabs under contact explosion were *** on this,the calculation formula between breach diameter,explosive quantity,and slab thickness is fitted.

关键词： Reinforced polymer slab Numerical investigations Empirical prediction damage models

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