{"title":"Assessment of concrete–rock contact shear behaviour based on in situ shear tests","authors":"M. Zoorabadi, T. G. Carter","doi":"10.1680/jdare.21.00006a","DOIUrl":null,"url":null,"abstract":"Defining shear strengths of concrete–rock contacts is extremely important for designing concrete structures such as arch and gravity concrete dams that are constructed on rock. Assessment of 34 large-scale in situ direct shear tests conducted on concrete–rock contacts of various roughnesses is presented in this paper. Evaluation of the peak strength results at moderate-to-low stress ranges, indicates that a non-linear trend with maximum at moderate roughness (joint roughness coefficient, JRC = 11–12) can reasonably represent relationships between peak and apparent shear strengths, shear stiffness and shear displacement relationships with respect to JRC. Apparent residual strength parameters appear to show a more linear Mohr–Coulomb to slightly non-linear trend with JRC and applied normal stress.","PeriodicalId":39070,"journal":{"name":"Dams and Reservoirs","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dams and Reservoirs","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1680/jdare.21.00006a","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}
引用次数: 1
Abstract
Defining shear strengths of concrete–rock contacts is extremely important for designing concrete structures such as arch and gravity concrete dams that are constructed on rock. Assessment of 34 large-scale in situ direct shear tests conducted on concrete–rock contacts of various roughnesses is presented in this paper. Evaluation of the peak strength results at moderate-to-low stress ranges, indicates that a non-linear trend with maximum at moderate roughness (joint roughness coefficient, JRC = 11–12) can reasonably represent relationships between peak and apparent shear strengths, shear stiffness and shear displacement relationships with respect to JRC. Apparent residual strength parameters appear to show a more linear Mohr–Coulomb to slightly non-linear trend with JRC and applied normal stress.