Influence of modified polyurea coating thickness on the blast resistance of RC slab

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2024-08-10 DOI:10.1016/j.istruc.2024.107009

Meng Mu, Fei Liu, Ji Li, Feng He, Sanfeng Liu, Chun Li, Yang Yang

{"title":"Influence of modified polyurea coating thickness on the blast resistance of RC slab","authors":"Meng Mu, Fei Liu, Ji Li, Feng He, Sanfeng Liu, Chun Li, Yang Yang","doi":"10.1016/j.istruc.2024.107009","DOIUrl":null,"url":null,"abstract":"To study the influence of modified polyurea coating thickness on the blast resistance performance of reinforced concrete (RC) slab, a field test was conducted with seven shots. The test recorded the dynamic response data of modified polyurea coated reinforced concrete (PRC) slab under contact explosion load, including the area and displacement of the coating deformation as well as acceleration. In addition, in order to further explore the influence law of different TNT charge quantities on coating deformation, numerical simulation research was carried out by using LS-DYNA. The test results show that, under the same explosion conditions, as the coating thickness increases, the peak displacement and residual displacement of the coating decrease, while the area of coating deformation first increases and then decreases. Increasing the thickness of the coating can also effectively reduce the speed at which peak displacement occurs, but increasing the rebound displacement may cause a secondary impact on the RC slab. By adding additional test conditions, the optimal coating thickness subjected different explosive loads can be determined, leading to the development of economical and highly resistant protective structures.","PeriodicalId":48642,"journal":{"name":"Structures","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structures","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.istruc.2024.107009","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

To study the influence of modified polyurea coating thickness on the blast resistance performance of reinforced concrete (RC) slab, a field test was conducted with seven shots. The test recorded the dynamic response data of modified polyurea coated reinforced concrete (PRC) slab under contact explosion load, including the area and displacement of the coating deformation as well as acceleration. In addition, in order to further explore the influence law of different TNT charge quantities on coating deformation, numerical simulation research was carried out by using LS-DYNA. The test results show that, under the same explosion conditions, as the coating thickness increases, the peak displacement and residual displacement of the coating decrease, while the area of coating deformation first increases and then decreases. Increasing the thickness of the coating can also effectively reduce the speed at which peak displacement occurs, but increasing the rebound displacement may cause a secondary impact on the RC slab. By adding additional test conditions, the optimal coating thickness subjected different explosive loads can be determined, leading to the development of economical and highly resistant protective structures.

查看原文本刊更多论文

改性聚脲涂层厚度对钢筋混凝土板抗爆性的影响

为研究改性聚脲涂层厚度对钢筋混凝土（RC）板抗爆性能的影响，进行了七次现场试验。试验记录了改性聚脲涂层钢筋混凝土（PRC）板在接触爆炸荷载下的动态响应数据，包括涂层变形的面积和位移以及加速度。此外，为了进一步探讨不同 TNT 装药量对涂层变形的影响规律，采用 LS-DYNA 进行了数值模拟研究。试验结果表明，在相同的爆炸条件下，随着涂层厚度的增加，涂层的峰值位移和残余位移减小，涂层变形面积先增大后减小。增加涂层厚度还能有效降低峰值位移发生的速度，但增加回弹位移可能会对 RC 板造成二次冲击。通过增加额外的试验条件，可以确定不同爆炸荷载下的最佳涂层厚度，从而开发出经济、高抗性的防护结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.