低速冲击下混凝土板的能量耗散研究

赵嘉琛,古松,任松波、顾颖、孔超、杨莉琼

振动与冲击 ›› 2023, Vol. 42 ›› Issue (23) : 300-306.

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (23) : 300-306.
论文

低速冲击下混凝土板的能量耗散研究

  • 赵嘉琛,古松,任松波、顾颖、孔超、杨莉琼
作者信息 +

Energy dissipation of concrete slabs under low-speed impact

  • ZHAO Jiachen,GU Song,REN Songbo,GU Ying,KONG Chao,YANG Liqiong
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文章历史 +

摘要

针对混凝土板类构件在低速冲击作用下能量耗散的问题,采用落锤装置对6组混凝土板试件进行低速冲击试验,结合弹性力学理论计算了试件的弹性变形能,并通过能量守恒定律得出试件塑性变形能,分析了混凝土强度和落锤冲量对混凝土板破坏能量耗散的影响。结果表明:在低速冲击下混凝土板所吸收能量的98%都通过塑性变形能的方式进行消耗;混凝土强度不能完全决定受低速冲击混凝土板塑性变形能的耗能,混凝土板的塑性变形能随冲击能量的增大而增大,并呈现出很好的线性关系。该研究可对提高混凝土板类构件在低速冲击作用下的防护能力提供参考,以供防护工程设计所需。

Abstract

Aiming at the problem of energy dissipation of concrete slabs under low-speed impact,six groups of concrete slab specimens were tested under low-speed impact using a drop hammer device.The elastic deformation energy of the specimens was calculated based on the theory of elastic mechanics,and the plastic deformation energy of the specimens was obtained through the law of energy conservation.The influence of concrete strength and drop hammer impulse on the energy dissipation of concrete slab failure was analyzed.The results show that 98% of the energy absorbed by the concrete slab under low velocity impact is consumed by plastic deformation energy;The strength of concrete can not completely determine the energy consumption of plastic deformation energy of concrete slabs under low velocity impact.The plastic deformation energy of concrete slabs increases with the increase in the impact energy,and presents a good linear relationship.This study can provide a reference for improving the protection ability of concrete slab members under low velocity impact,and it is necessary for the design of protection engineering.

关键词

落石 / 混凝土 / 低速冲击 / 塑性变形能 / 能量耗散

Key words

Falling Rocks / concrete / Low speed impact / Plastic deformation energy / energy dissipation

引用本文

导出引用
赵嘉琛,古松,任松波、顾颖、孔超、杨莉琼. 低速冲击下混凝土板的能量耗散研究[J]. 振动与冲击, 2023, 42(23): 300-306
ZHAO Jiachen,GU Song,REN Songbo,GU Ying,KONG Chao,YANG Liqiong. Energy dissipation of concrete slabs under low-speed impact[J]. Journal of Vibration and Shock, 2023, 42(23): 300-306

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