Experimental study on the damage characteristics of steel fiber reinforced concrete slabs attacked by chloride ion under contact explosion

IF 4.3 2区工程技术 Q1 ENGINEERING, OCEAN Applied Ocean Research Pub Date : 2024-10-26 DOI:10.1016/j.apor.2024.104270

Xiaohua Zhao , Guo Jiang , Lin Yang , Yongsheng Jia , Hongyuan Fang , Jinshan Sun , Haonan Zhao

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Abstract

In order to study the damage characteristics of steel fiber reinforced concrete slabs attacked by chloride ion under explosive loading, contact explosion tests were performed for nine pieces of 500 mm × 500 mm × 60 mm slabs. These slabs were divided into three groups based on corrosion time of seawater (uncorroded, corrosion for 10 days, corrosion for 20 days) to achieve different degrees of chloride ion erosion effect. The dynamic response of the steel fiber reinforced concrete slab under contact blast loading were compared and analyzed, and the effects of explosives quality and degree of corrosion were explored. Besides, the propagation characteristics of the stress wave in the slab and the typical damage mode were also studied. The results show that the damage degree of steel fiber reinforced concrete slab has a non-linear increase with the increase of seawater corrosion. Slabs suffer different damage patterns such as cratering and spalling for different qualities of explosives. In addition, based on the experimental results, an empirical formula for predicting the diameter of the blast crater was established.

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接触爆炸条件下氯离子侵蚀钢筋混凝土板破坏特征的实验研究

为了研究钢筋混凝土板在爆炸荷载下受氯离子侵蚀的破坏特征，对 9 块 500 mm × 500 mm × 60 mm 的板进行了接触爆炸试验。这些板块根据海水腐蚀时间分为三组（未腐蚀、腐蚀 10 天、腐蚀 20 天），以达到不同程度的氯离子侵蚀效果。对比分析了钢纤维增强混凝土板在接触爆破荷载下的动态响应，并探讨了炸药质量和腐蚀程度的影响。此外，还研究了板中应力波的传播特征和典型的破坏模式。结果表明，随着海水腐蚀程度的增加，钢筋混凝土板的破坏程度呈非线性增加。在不同质量的炸药作用下，板块会出现不同的破坏模式，如缩孔和剥落。此外，根据实验结果，建立了预测爆炸坑直径的经验公式。

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来源期刊

Applied Ocean Research 地学-工程：大洋

CiteScore

8.70

自引率

7.00%

发文量

316

审稿时长

59 days

期刊介绍： The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.