{"title":"Mitigation of Seismic Induced Diagonal Cracks in Concrete Columns by External Prestressing","authors":"M. Saatcioglu","doi":"10.14359/10820","DOIUrl":null,"url":null,"abstract":"A new technology was developed for controlling diagonal shear cracking in earthquake resistant concrete bridge columns. The technology consists of external prestressing columns in transverse direction by means of individual hoops consisting of prestressing strands and specially designed anchors. It is especially suitable for seismic retrofitting circular bridge columns against shear. The technology was verified through experimental investigation of shear deficient columns. Three full-scale columns were tested under constant axial compression and incrementally increasing lateral deformation reversals. The results, presented and discussed in the paper, indicate that the technique can control diagonal cracking, thereby suppressing shear failure and promoting flexural behavior. A design procedure is also presented for seismic retrofit of shear-deficient columns.","PeriodicalId":130124,"journal":{"name":"SP-204: Design and Construction Practices to Mitigate Cracking","volume":"4 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"SP-204: Design and Construction Practices to Mitigate Cracking","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14359/10820","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A new technology was developed for controlling diagonal shear cracking in earthquake resistant concrete bridge columns. The technology consists of external prestressing columns in transverse direction by means of individual hoops consisting of prestressing strands and specially designed anchors. It is especially suitable for seismic retrofitting circular bridge columns against shear. The technology was verified through experimental investigation of shear deficient columns. Three full-scale columns were tested under constant axial compression and incrementally increasing lateral deformation reversals. The results, presented and discussed in the paper, indicate that the technique can control diagonal cracking, thereby suppressing shear failure and promoting flexural behavior. A design procedure is also presented for seismic retrofit of shear-deficient columns.
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