Critical evaluation of compression interpretation criteria for drilled shafts / Yit-Jin Chen in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 8 (Août 2009)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 135 N° 8 (Août 2009) . - pp. 1056–1069 Titre : Critical evaluation of compression interpretation criteria for drilled shafts Type de document : texte imprimé Auteurs : Yit-Jin Chen, Auteur ; Yi-Chung Fang, Auteur Année de publication : 2009 Article en page(s) : pp. 1056–1069 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Drilled shafts Foundations Compression Load tests Displacement Safety factors Résumé : This paper is a critical evaluation of the interpretation criteria of drilled shafts under axial compression loading. A wide variety of load test data are used for analysis, and these data are divided into drained and undrained databases. The interpretation criteria are examined from these load test results to establish a consistent compression interpretation criterion. Among these criteria, the range of each interpretation method presents approximately the same trend for both drained and undrained conditions. The statistical results show that the smaller the compression displacement, the higher the coefficient of variation. Moreover, the undrained load test results reveal less variability than the drained results. The load-displacement curve of a drained loading also demonstrates more ductility than that for undrained loading. Based on these analyses, the relative merits and interrelationships of these criteria are established, and specific design recommendations for the interpretation of compression drilled shaft load test, in terms of both capacity and displacement, are given. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000027 [article] Critical evaluation of compression interpretation criteria for drilled shafts [texte imprimé] / Yit-Jin Chen, Auteur ; Yi-Chung Fang, Auteur . - 2009 . - pp. 1056–1069. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 8 (Août 2009) . - pp. 1056–1069 Mots-clés : Drilled shafts Foundations Compression Load tests Displacement Safety factors Résumé : This paper is a critical evaluation of the interpretation criteria of drilled shafts under axial compression loading. A wide variety of load test data are used for analysis, and these data are divided into drained and undrained databases. The interpretation criteria are examined from these load test results to establish a consistent compression interpretation criterion. Among these criteria, the range of each interpretation method presents approximately the same trend for both drained and undrained conditions. The statistical results show that the smaller the compression displacement, the higher the coefficient of variation. Moreover, the undrained load test results reveal less variability than the drained results. The load-displacement curve of a drained loading also demonstrates more ductility than that for undrained loading. Based on these analyses, the relative merits and interrelationships of these criteria are established, and specific design recommendations for the interpretation of compression drilled shaft load test, in terms of both capacity and displacement, are given. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000027

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Evaluation of lateral interpretation criteria for drilled shaft capacity / Yit-Jin Chen in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 8 (Août 2010)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 136 N° 8 (Août 2010) . - pp.1124-1136 Titre : Evaluation of lateral interpretation criteria for drilled shaft capacity Type de document : texte imprimé Auteurs : Yit-Jin Chen, Auteur ; Yun-Hsuan Lee, Auteur Année de publication : 2010 Article en page(s) : pp.1124-1136 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Interpretation criteria Drilled shafts Lateral loading Load tests Displacement Rotation Safety factors Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Representative interpretation criteria are examined to evaluate the capacity of nonrigid drilled shaft foundations under lateral loading. A wide variety of lateral load test data are used for analysis, and these data are divided into drained and undrained databases. The interpretation criteria are applied to these load test data to establish consistent lateral interpretation criteria. Among these criteria, the results are generally comparable for both drained and undrained loading. The statistical results show that the smaller the displacement or rotation is, the higher the coefficient of variation. Moreover, the undrained load test results present somehow less variability than the drained results. Based on these analyses, the relative merits and interrelationships of these criteria are established, and specific design recommendations for the interpretation of lateral drilled shaft load test are given in terms of capacity, displacement, and rotation. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i8/p1124_s1?isAuthorized=no [article] Evaluation of lateral interpretation criteria for drilled shaft capacity [texte imprimé] / Yit-Jin Chen, Auteur ; Yun-Hsuan Lee, Auteur . - 2010 . - pp.1124-1136. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 8 (Août 2010) . - pp.1124-1136 Mots-clés : Interpretation criteria Drilled shafts Lateral loading Load tests Displacement Rotation Safety factors Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Representative interpretation criteria are examined to evaluate the capacity of nonrigid drilled shaft foundations under lateral loading. A wide variety of lateral load test data are used for analysis, and these data are divided into drained and undrained databases. The interpretation criteria are applied to these load test data to establish consistent lateral interpretation criteria. Among these criteria, the results are generally comparable for both drained and undrained loading. The statistical results show that the smaller the displacement or rotation is, the higher the coefficient of variation. Moreover, the undrained load test results present somehow less variability than the drained results. Based on these analyses, the relative merits and interrelationships of these criteria are established, and specific design recommendations for the interpretation of lateral drilled shaft load test are given in terms of capacity, displacement, and rotation. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i8/p1124_s1?isAuthorized=no

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Evaluation of uplift interpretation criteria for drilled shaft capacity / Yit-Jin Chen in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N°10 (Octobre 2008)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 134 N°10 (Octobre 2008) . - pp. 1459–1468 Titre : Evaluation of uplift interpretation criteria for drilled shaft capacity Type de document : texte imprimé Auteurs : Yit-Jin Chen, Auteur ; Hsin-Wen Chang, Auteur ; Fred H. Kulhawy, Auteur Année de publication : 2008 Article en page(s) : pp. 1459–1468 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Drilled shafts Foundations Uplift Load tests Displacement Résumé : Representative interpretation criteria are examined to evaluate the capacity of drilled shaft foundations under axial uplift loading. A wide variety of uplift load test data are used, and these data are divided into drained and undrained databases. The interpretation criteria are applied to these load test data to establish a consistent uplift interpretation criterion. The results are comparable for both drained and undrained loading. In general, the undrained load test results show somewhat less variability than the drained results. Based on these analyses, the QL2 , Q0.5in , and slope tangent methods are the more reliable and consistent, and specific design recommendations for the interpretation of uplift drilled shaft load test are given, in terms of both capacity and displacement. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A10%281 [...] [article] Evaluation of uplift interpretation criteria for drilled shaft capacity [texte imprimé] / Yit-Jin Chen, Auteur ; Hsin-Wen Chang, Auteur ; Fred H. Kulhawy, Auteur . - 2008 . - pp. 1459–1468. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°10 (Octobre 2008) . - pp. 1459–1468 Mots-clés : Drilled shafts Foundations Uplift Load tests Displacement Résumé : Representative interpretation criteria are examined to evaluate the capacity of drilled shaft foundations under axial uplift loading. A wide variety of uplift load test data are used, and these data are divided into drained and undrained databases. The interpretation criteria are applied to these load test data to establish a consistent uplift interpretation criterion. The results are comparable for both drained and undrained loading. In general, the undrained load test results show somewhat less variability than the drained results. Based on these analyses, the QL2 , Q0.5in , and slope tangent methods are the more reliable and consistent, and specific design recommendations for the interpretation of uplift drilled shaft load test are given, in terms of both capacity and displacement. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A10%281 [...]

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