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2004安全科学与技术国际会议

作者： WANG Zhongqiang YU Zhiwu & YU Feng (Civil and Architecture College Central South University Changsha 410075 Hunan China)

Using a homemade large-scale high temperature experimental stove, a group of reinforced concrete slabs are heated on their single surfaces, of which the loading operating modes are different. After co

关键词： reinforced concrete slabs high temperature experiment behavior fire

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Lead spall velocity of fragments of ultra-high-performance concrete slabs under partially embedded cylindrical charge-induced explosion

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Defence Technology（防务技术） 2023年第5期23卷 50-59页

作者： Yi Fan Li Chen Heng-bo Xiang Qin Fang Fang-yu Han State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact Army Engineering University of PLANanjingJiangsu210007China Engineering Research Center of Safety and Protection of Explosion&Impact of Ministry of Education Southeast UniversityNanjingJiangsu211189China State Key Laboratory of High Performance Civil Engineering Materials NanjingJiangsu211103China

When an explosion occurs close to or partially within the face of a concrete structure, fragments are rapidly launched from the opposite face of the structure owing to concrete spalling, posing a significant risk to nearby personnel and equipment. To study the lead fragment velocity of ultra-high-performance concrete(UHPC), partially embedded explosion experiments were performed on UHPC slabs of limited thickness using a cylindrical trinitrotoluene charge. The launch angles and velocities of the resulting fragments were the determined using images collected by high-speed camera to document the concrete spalling and fragment launching process. The results showed that UHPC slabs without fiber reinforcement had a fragment velocity distribution of 0-118.3 m/s, which are largely identical to that for a normal-strength concrete(NSC) slab. In addition, the fragment velocity was negatively correlated to the angle between the velocity vector and vertical direction. An empirical Eq. for the lead spall velocity of UHPC and NSC slabs was then proposed based on a large volume of existing experimental data.

关键词： Ultra-high-performance concrete reinforced concrete slabs Explosion Fragment velocity Blast resistance

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