{"title":"Cyclic Loading Test of Phase Change Material (PCM)-Infilled Buckling-Restrained Brace","authors":"Jaehoon Bae, Young K. Ju, Jintak Oh","doi":"10.1007/s40999-024-00986-x","DOIUrl":null,"url":null,"abstract":"<p>Buckling restrained braces (BRBs) enhance energy dissipation and ductility considerably by preventing the buckling of steel braces under cyclic loads during earthquakes and, thus, the strength degradation caused by buckling. This paper introduces and discusses the development of BRBs made with an elastomer known as phase change material (PCM), which has superior ductility and faster-filling properties than commonly used mortar while being approximately 50% lighter. BRBs filled with PCM have high ductility and good energy dissipation. To verify the seismic performance of the PCM BRB, axial brace tests and subframe tests were conducted. Using PCM as the filler in the axial tests ensured a stable tension and compression ratio (below 1.5), as recommended by the AISC provisions, and the core material fully withstood axial loads for six cycles beyond 1.5delta_bm. Global buckling occurred after 2.0delta_bm under compression, at which point the experiment was terminated.</p>","PeriodicalId":50331,"journal":{"name":"International Journal of Civil Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s40999-024-00986-x","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
Buckling restrained braces (BRBs) enhance energy dissipation and ductility considerably by preventing the buckling of steel braces under cyclic loads during earthquakes and, thus, the strength degradation caused by buckling. This paper introduces and discusses the development of BRBs made with an elastomer known as phase change material (PCM), which has superior ductility and faster-filling properties than commonly used mortar while being approximately 50% lighter. BRBs filled with PCM have high ductility and good energy dissipation. To verify the seismic performance of the PCM BRB, axial brace tests and subframe tests were conducted. Using PCM as the filler in the axial tests ensured a stable tension and compression ratio (below 1.5), as recommended by the AISC provisions, and the core material fully withstood axial loads for six cycles beyond 1.5delta_bm. Global buckling occurred after 2.0delta_bm under compression, at which point the experiment was terminated.
期刊介绍：
International Journal of Civil Engineering, The official publication of Iranian Society of Civil Engineering and Iran University of Science and Technology is devoted to original and interdisciplinary, peer-reviewed papers on research related to the broad spectrum of civil engineering with similar emphasis on all topics.The journal provides a forum for the International Civil Engineering Community to present and discuss matters of major interest e.g. new developments in civil regulations, The topics are included but are not necessarily restricted to :- Structures- Geotechnics- Transportation- Environment- Earthquakes- Water Resources- Construction Engineering and Management, and New Materials.
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