{"title":"20世纪70年代以前建造的混凝土外梁柱节点实例研究","authors":"Ravi Kiran , Giovacchino Genesio","doi":"10.1016/j.csse.2014.04.002","DOIUrl":null,"url":null,"abstract":"<div><p>The exterior beam-column (EBC) joints in the second generation concrete structures (built prior to 1970s) were observed to underperform during earthquakes mainly due to the lack of shear reinforcement and improper construction practices. In this paper, results of a detailed parametric study conducted using 3D finite element analysis are presented to illustrate the performance of three types of substandard EBC joints that are typical to pre 1970s construction practices designed according to: (1) ACI 318-1971, (2) old Japanese practice and (3) old Indian practice. In addition, the influence of concrete strength, beam and column flexural reinforcements on the load carrying capacity of substandard EBC joints are investigated. The substandard joints analyzed in this study failed in a brittle fashion due to the shear failure of joint core concrete and anchorage slippage.</p></div>","PeriodicalId":100222,"journal":{"name":"Case Studies in Structural Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csse.2014.04.002","citationCount":"12","resultStr":"{\"title\":\"A case study on pre 1970s constructed concrete exterior beam-column joints\",\"authors\":\"Ravi Kiran , Giovacchino Genesio\",\"doi\":\"10.1016/j.csse.2014.04.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The exterior beam-column (EBC) joints in the second generation concrete structures (built prior to 1970s) were observed to underperform during earthquakes mainly due to the lack of shear reinforcement and improper construction practices. In this paper, results of a detailed parametric study conducted using 3D finite element analysis are presented to illustrate the performance of three types of substandard EBC joints that are typical to pre 1970s construction practices designed according to: (1) ACI 318-1971, (2) old Japanese practice and (3) old Indian practice. In addition, the influence of concrete strength, beam and column flexural reinforcements on the load carrying capacity of substandard EBC joints are investigated. The substandard joints analyzed in this study failed in a brittle fashion due to the shear failure of joint core concrete and anchorage slippage.</p></div>\",\"PeriodicalId\":100222,\"journal\":{\"name\":\"Case Studies in Structural Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.csse.2014.04.002\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Case Studies in Structural Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S221439981400006X\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Structural Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S221439981400006X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A case study on pre 1970s constructed concrete exterior beam-column joints
The exterior beam-column (EBC) joints in the second generation concrete structures (built prior to 1970s) were observed to underperform during earthquakes mainly due to the lack of shear reinforcement and improper construction practices. In this paper, results of a detailed parametric study conducted using 3D finite element analysis are presented to illustrate the performance of three types of substandard EBC joints that are typical to pre 1970s construction practices designed according to: (1) ACI 318-1971, (2) old Japanese practice and (3) old Indian practice. In addition, the influence of concrete strength, beam and column flexural reinforcements on the load carrying capacity of substandard EBC joints are investigated. The substandard joints analyzed in this study failed in a brittle fashion due to the shear failure of joint core concrete and anchorage slippage.
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