{"title":"空腔陶土混凝土墙板防火性能的实验和数值研究","authors":"Anlian Wang , Zhiwen Zhang , Zeqing Wan , Yan Liu","doi":"10.1016/j.cscm.2024.e03492","DOIUrl":null,"url":null,"abstract":"<div><p>To investigate the fire performance of hollow-cavity ceramsite concrete wall-panels (HCCCW), this study conducted one-sided fire tests on four HCCCWs. The experiment yielded results on their thermal response, fire resistance, and out-of-plane deformation, providing insights into the heat transfer mechanism of HCCCWs under one-sided fire exposure. An analysis of the distribution characteristics of section temperature fields and temperature gradients was performed by establishing finite element (FE) models. Based on the validated models, parametric studies were conducted on hollow-cavity area, volume-cavity ratio, ceramsite concrete density, and type of filling material. The results indicate that as the volume-cavity ratio increased from 23.55 % to 35.00 %, the duration of steam escape from the unexposed surface decreased by 43.75 % and the number of cracks on the fire-exposed surface decreased by 58.97 %. In the temperature-time curve for the unexposed surface of HCCCW, both the duration of heat front propagation and temperature plateau increase with a decrease in volumetric cavity ratio and cavity surface area. Compared to heat conduction in ceramsite concrete, cavity radiation significantly improves heat transfer efficiency. Additionally, the temperature at the center of the cavity is approximately 20 % higher than at its midpoint along with webbing. Decreasing hollow-cavity area and volume-cavity ratio or increasing ceramsite concrete density effectively enhances HCCCW's fire resistance. Considering structural weight, material cost, and fire resistance, filling cavities with rockwool proves to be most cost-effective.</p></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"21 ","pages":"Article e03492"},"PeriodicalIF":6.5000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214509524006430/pdfft?md5=97534b96282110e342aaa92e457b1824&pid=1-s2.0-S2214509524006430-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Experimental and numerical investigation on fire performance of hollow-cavity ceramsite concrete wall-panel\",\"authors\":\"Anlian Wang , Zhiwen Zhang , Zeqing Wan , Yan Liu\",\"doi\":\"10.1016/j.cscm.2024.e03492\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To investigate the fire performance of hollow-cavity ceramsite concrete wall-panels (HCCCW), this study conducted one-sided fire tests on four HCCCWs. The experiment yielded results on their thermal response, fire resistance, and out-of-plane deformation, providing insights into the heat transfer mechanism of HCCCWs under one-sided fire exposure. An analysis of the distribution characteristics of section temperature fields and temperature gradients was performed by establishing finite element (FE) models. Based on the validated models, parametric studies were conducted on hollow-cavity area, volume-cavity ratio, ceramsite concrete density, and type of filling material. The results indicate that as the volume-cavity ratio increased from 23.55 % to 35.00 %, the duration of steam escape from the unexposed surface decreased by 43.75 % and the number of cracks on the fire-exposed surface decreased by 58.97 %. In the temperature-time curve for the unexposed surface of HCCCW, both the duration of heat front propagation and temperature plateau increase with a decrease in volumetric cavity ratio and cavity surface area. Compared to heat conduction in ceramsite concrete, cavity radiation significantly improves heat transfer efficiency. Additionally, the temperature at the center of the cavity is approximately 20 % higher than at its midpoint along with webbing. Decreasing hollow-cavity area and volume-cavity ratio or increasing ceramsite concrete density effectively enhances HCCCW's fire resistance. Considering structural weight, material cost, and fire resistance, filling cavities with rockwool proves to be most cost-effective.</p></div>\",\"PeriodicalId\":9641,\"journal\":{\"name\":\"Case Studies in Construction Materials\",\"volume\":\"21 \",\"pages\":\"Article e03492\"},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2214509524006430/pdfft?md5=97534b96282110e342aaa92e457b1824&pid=1-s2.0-S2214509524006430-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Case Studies in Construction Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2214509524006430\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Construction Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214509524006430","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Experimental and numerical investigation on fire performance of hollow-cavity ceramsite concrete wall-panel
To investigate the fire performance of hollow-cavity ceramsite concrete wall-panels (HCCCW), this study conducted one-sided fire tests on four HCCCWs. The experiment yielded results on their thermal response, fire resistance, and out-of-plane deformation, providing insights into the heat transfer mechanism of HCCCWs under one-sided fire exposure. An analysis of the distribution characteristics of section temperature fields and temperature gradients was performed by establishing finite element (FE) models. Based on the validated models, parametric studies were conducted on hollow-cavity area, volume-cavity ratio, ceramsite concrete density, and type of filling material. The results indicate that as the volume-cavity ratio increased from 23.55 % to 35.00 %, the duration of steam escape from the unexposed surface decreased by 43.75 % and the number of cracks on the fire-exposed surface decreased by 58.97 %. In the temperature-time curve for the unexposed surface of HCCCW, both the duration of heat front propagation and temperature plateau increase with a decrease in volumetric cavity ratio and cavity surface area. Compared to heat conduction in ceramsite concrete, cavity radiation significantly improves heat transfer efficiency. Additionally, the temperature at the center of the cavity is approximately 20 % higher than at its midpoint along with webbing. Decreasing hollow-cavity area and volume-cavity ratio or increasing ceramsite concrete density effectively enhances HCCCW's fire resistance. Considering structural weight, material cost, and fire resistance, filling cavities with rockwool proves to be most cost-effective.
期刊介绍:
Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation).
The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.