不同拉筋构造单钢板混凝土结构抗冲击性能试验研究
Experimental Research on Impact Resistance of Half Steel Plate Concrete Structures with Different Tie Bar Details
于跃 1蔡利建 1唐若洋 2丁然 2樊健生 2刘广鹤2
作者信息
- 1. 中国核电工程有限公司,北京 100840
- 2. 清华大学土木工程系,北京 100084
- 折叠
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.
Abstract
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 resist-ance,with great application prospects in the fields of nuclear power plant containment shells and roof pan-els.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 pan-els 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 ben-eficial to control the deformation in the impact area and the dynamic response peak near the impact area.
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Key words
half steel plate concrete/nuclear power plant structure/tie bar connection type/failure mecha-nism/impact resistance引用本文复制引用
基金项目
国家重点研发计划(2022YFC3802000)
国家自然科学基金项目(52121005)
出版年
2024
NETL
NSTL
万方数据