{"title":"Anti-explosion Performance of a New Type of Polyurea-Coated Corrugated Steel Plate Reinforced Concrete Slab","authors":"Wei Wang, Congkun Zhang, Guangrui Yang","doi":"10.1186/s40069-024-00682-z","DOIUrl":null,"url":null,"abstract":"<p>Improving the explosion resistance of the building wall has been a hot topic in the current protection engineering research, in this process, corrugated steel and polyisocyanate oxazolidine (POZD) were widely used, but there are few studies on the anti-explosion performance of the composite structure of the two. In this paper, the effects of POZD and corrugated steel on the explosion resistance of POZD-coated corrugated steel plate reinforced concrete slab (PSRC) under contact explosion were studied by test and numerical simulation. The finite element (FE) model of the PSRC slab was established by using Arbitrary Lagrangian–Eulerian (ALE) method. The principle of POZD coating reinforced structure was revealed by analyzing the attenuation process of stress wave propagation in the structure. Subsequently, a series of numerical calculations were conducted to investigate the effect of POZD thickness and corrugated steel angle on the performance of the PSRC slab under explosive load. The relationship between structural damage characteristics and the POZD coating was established, the empirical formula of the normalized maximum mid-span displacement considering POZD thickness and TNT mass was obtained. The effect of corrugated steel with different angles on its anti-explosion performance was analyzed, the empirical formula of the maximum deflection considering corrugated steel angle and TNT mass was obtained. Studies have shown that the peak stress of the stress wave generated by the explosion is only 2.79% of the incident wave after the POZD coating is coated on the back of the structure, the anti-explosion performance of the structure is greatly improved. Increasing the thickness of POZD can significantly increase the anti-explosion performance of PSRC slab, the maximum deflection of PSRC slab decreases exponentially with increasing POZD thickness. The explosion resistance of PSRC slab was enhanced with increasing corrugated steel angles. The corrugated steel angles is 50 , the improvement effect of PSRC is the best.</p>","PeriodicalId":13832,"journal":{"name":"International Journal of Concrete Structures and Materials","volume":null,"pages":null},"PeriodicalIF":3.6000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Concrete Structures and Materials","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1186/s40069-024-00682-z","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Improving the explosion resistance of the building wall has been a hot topic in the current protection engineering research, in this process, corrugated steel and polyisocyanate oxazolidine (POZD) were widely used, but there are few studies on the anti-explosion performance of the composite structure of the two. In this paper, the effects of POZD and corrugated steel on the explosion resistance of POZD-coated corrugated steel plate reinforced concrete slab (PSRC) under contact explosion were studied by test and numerical simulation. The finite element (FE) model of the PSRC slab was established by using Arbitrary Lagrangian–Eulerian (ALE) method. The principle of POZD coating reinforced structure was revealed by analyzing the attenuation process of stress wave propagation in the structure. Subsequently, a series of numerical calculations were conducted to investigate the effect of POZD thickness and corrugated steel angle on the performance of the PSRC slab under explosive load. The relationship between structural damage characteristics and the POZD coating was established, the empirical formula of the normalized maximum mid-span displacement considering POZD thickness and TNT mass was obtained. The effect of corrugated steel with different angles on its anti-explosion performance was analyzed, the empirical formula of the maximum deflection considering corrugated steel angle and TNT mass was obtained. Studies have shown that the peak stress of the stress wave generated by the explosion is only 2.79% of the incident wave after the POZD coating is coated on the back of the structure, the anti-explosion performance of the structure is greatly improved. Increasing the thickness of POZD can significantly increase the anti-explosion performance of PSRC slab, the maximum deflection of PSRC slab decreases exponentially with increasing POZD thickness. The explosion resistance of PSRC slab was enhanced with increasing corrugated steel angles. The corrugated steel angles is 50 , the improvement effect of PSRC is the best.
期刊介绍：
The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on
Properties and performance of concrete and concrete structures
Advanced and improved experimental techniques
Latest modelling methods
Possible improvement and enhancement of concrete properties
Structural and microstructural characterization
Concrete applications
Fiber reinforced concrete technology
Concrete waste management.
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