摘要
单钢板混凝土组合结构是在钢结构与混凝土结构的基础上发展出来的一种结构形式,与普通钢筋混凝土结构相比,具有承载能力高、密闭性好、抗冲击爆炸性能好等特点,在核电结构安全壳和楼面板等领域具有良好的应用前景。然而,现阶段单钢板混凝土结构体系拉筋的连接型式尚不明确,不同型式拉筋的抗冲击性能也缺乏研究。为研究实际工程中不同构造形式对拉筋破坏机理和抗冲击能力的影响,设计了缩尺比为1∶20和1∶10的单钢板混凝土靶板,采用3种拉筋连接型式,针对不同的拉筋构造开展动力冲击试验,揭示不同拉筋构造在动力冲击荷载作用下的受力机制和破坏模式。结果表明:单钢板混凝土组合结构靶板在局部冲击作用下的破坏模式主要为鼓曲和贯穿,且随着入射弹体动能的增加呈现更明显的局部破坏现象。影响单元板件破坏模式的主要因素是板厚,其次是冲击速度。应用拉筋端锚型搭接式构造,更有利于冲击区域内板件变形以及冲击区域附近动力响应峰值的控制。
Half steel plate concrete composite(HSC)structures are a kind of structural form developed on the basis of steel structures and concrete structures.Compared with ordinary reinforced concrete structures,they have the characteristics of high bearing capacity,good tightness,good impact and explosion resistance,with great application prospects in the fields of nuclear power plant containment shells and roof panels.However,at present,the connection type of tie bars has not been clear,and the impact resistance of different types of tie bars have not been studied.In order to investigate the influence of different structural forms on the failure mechanism and impact resistance of tie bars in actual engineering,the HSC target panels with a scale ratio of 1∶20 and 1∶10 were designed respectively,with three types of tie bar connections.Dynamic impact tests were carried out,and the force mechanism as well as failure modes of different tie bar connections were revealed under dynamic impact load.The results showed that the failure modes of HSC target plates under local impact were mainly bulging and penetrative.The local failure phenomenon was more obvious with the increase of kinetic energy of projectile body.The main factor affecting the failure mode was the plate thickness,followed by the impact velocity.The application of end anchor structure is more beneficial to control the deformation in the impact area and the dynamic response peak near the impact area.
作者
于跃
蔡利建
唐若洋
丁然
樊健生
刘广鹤
YU Yue;CAI Lijian;TANG Ruoyang;DING Ran;FAN Jiansheng;LIU Guanghe(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《工业建筑》
2024年第8期19-27,共9页
Industrial Construction
基金
国家重点研发计划(2022YFC3802000)
国家自然科学基金项目(52121005)。
关键词
单钢板混凝土
核电结构
拉筋连接型式
破坏机理
抗冲击能力
half steel plate concrete
nuclear power plant structure
tie bar connection type
failure mechanism
impact resistance
