Documents disponibles écrits par cet auteur

Behavior of suction embedded plate anchors during keying process / Ming Yang in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 2 (Fevrier 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 2 (Fevrier 2012) . - pp. 174-183 Titre : Behavior of suction embedded plate anchors during keying process Type de document : texte imprimé Auteurs : Ming Yang, Auteur ; Charles P. Aubeny, Auteur ; James D. Murff, Auteur Année de publication : 2012 Article en page(s) : pp. 174-183 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : SEPLA  Anchor  capacity  Trajectory  Keying  process  Undrained  soil  Generalized  plasticity  Associated  flow  rule Résumé : Suction embedded plate anchors (SEPLAs) allow for accurate positioning, thus providing an attractive alternative to traditional drag embedment anchors. This paper presents an analytical model for predicting the behavior of SEPLAs during the keying process, with a specific focus on predicting the loss of embedment depth as the anchor rotates from its initial vertical position to its target orientation perpendicular to the direction of loading. The soil is idealized as an incompressible, rigid-plastic material obeying an associated-flow rule. A generalized plastic limit analysis is employed to estimate the trajectories and corresponding capacities of SEPLAs under different loading conditions. The effects of soil resistance on the shank and anchor interaction with the anchor chain are also considered in the model. The SEPLA design commonly features a hinged flap; the effect of the flap is examined theoretically by comparing the solutions for the SEPLA with and without flap. Predicted solutions are shown in reasonably good agreement with some published numerical and experimental results, supporting the validity of the model. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v138/i2/p174_s1?isAuthorized=no [article] Behavior of suction embedded plate anchors during keying process [texte imprimé] / Ming Yang, Auteur ; Charles P. Aubeny, Auteur ; James D. Murff, Auteur . - 2012 . - pp. 174-183. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 2 (Fevrier 2012) . - pp. 174-183 Mots-clés : SEPLA  Anchor  capacity  Trajectory  Keying  process  Undrained  soil  Generalized  plasticity  Associated  flow  rule Résumé : Suction embedded plate anchors (SEPLAs) allow for accurate positioning, thus providing an attractive alternative to traditional drag embedment anchors. This paper presents an analytical model for predicting the behavior of SEPLAs during the keying process, with a specific focus on predicting the loss of embedment depth as the anchor rotates from its initial vertical position to its target orientation perpendicular to the direction of loading. The soil is idealized as an incompressible, rigid-plastic material obeying an associated-flow rule. A generalized plastic limit analysis is employed to estimate the trajectories and corresponding capacities of SEPLAs under different loading conditions. The effects of soil resistance on the shank and anchor interaction with the anchor chain are also considered in the model. The SEPLA design commonly features a hinged flap; the effect of the flap is examined theoretically by comparing the solutions for the SEPLA with and without flap. Predicted solutions are shown in reasonably good agreement with some published numerical and experimental results, supporting the validity of the model. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v138/i2/p174_s1?isAuthorized=no

Prediction strategy of adsorption equilibrium time based on equilibrium and kinetic results to isolate taxifolin / Tingting Liu in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 454-463 Titre : Prediction strategy of adsorption equilibrium time based on equilibrium and kinetic results to isolate taxifolin Type de document : texte imprimé Auteurs : Tingting Liu, Auteur ; Ming Yang, Auteur ; Tianxin Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 454-463 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetics  Adsorption  Prediction Résumé : We proposed a systematic strategy based on the studies about the adsorption performance of AB-8 macroporous adsorption resins for prediction of the equilibrium time in taxifolin isolation. Batch experiments were appropriately designed to obtain the best fitting model and to gain insight into the adsorption mechanisms. A modified Langmuir model was used to calculate the adsorption capacity at the adsorption equilibrium point (Qe). Subsequently, the reformed pseudo-secondorder model was employed to predict the effects of the second-order rate index (k2Qe) on the adsorption time (t). Then, the effects of the initial adsorption factor (Ri) on the relative adsorption time (t/te) were predicted by the reformed intraparticle diffusion model. On the basis of mathematical deduction, the value of the adsorption equilibrium time (te) can be predicted, which may lead to reduced sampling in adsorption kinetics studies. Furthermore, the good agreement between experimental and predicted data confirmed the reliability of the proposed strategy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476489 [article] Prediction strategy of adsorption equilibrium time based on equilibrium and kinetic results to isolate taxifolin [texte imprimé] / Tingting Liu, Auteur ; Ming Yang, Auteur ; Tianxin Wang, Auteur . - 2012 . - pp. 454-463. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 454-463 Mots-clés : Kinetics  Adsorption  Prediction Résumé : We proposed a systematic strategy based on the studies about the adsorption performance of AB-8 macroporous adsorption resins for prediction of the equilibrium time in taxifolin isolation. Batch experiments were appropriately designed to obtain the best fitting model and to gain insight into the adsorption mechanisms. A modified Langmuir model was used to calculate the adsorption capacity at the adsorption equilibrium point (Qe). Subsequently, the reformed pseudo-secondorder model was employed to predict the effects of the second-order rate index (k2Qe) on the adsorption time (t). Then, the effects of the initial adsorption factor (Ri) on the relative adsorption time (t/te) were predicted by the reformed intraparticle diffusion model. On the basis of mathematical deduction, the value of the adsorption equilibrium time (te) can be predicted, which may lead to reduced sampling in adsorption kinetics studies. Furthermore, the good agreement between experimental and predicted data confirmed the reliability of the proposed strategy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476489

Undrained capacity of plate anchors under general loading / Ming Yang in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 10 (Octobre 2010) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 10 (Octobre 2010) . - pp. 1383-1393 Titre : Undrained capacity of plate anchors under general loading Type de document : texte imprimé Auteurs : Ming Yang, Auteur ; James Donald Murff, Auteur ; Charles Paul Aubeny, Auteur Année de publication : 2010 Article en page(s) : pp. 1383-1393 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Plate  anchors  Load  bearing  capacity  Plasticity  Offshore  engineering  Finite  element  method  Limit  analyses  Three-dimensional  loading Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Under general conditions of loading, a plate anchor is subjected to six degrees of freedom of loading, three force components and three moment components. Prediction of the anchor performance under general conditions of loading requires realistic estimates of the anchor pullout capacity for each individual load component as well as the interaction effects when these loads are applied in combination. This paper presents an analysis of plate anchor capacity under these general conditions of loading. The study considers a range of plate width-to-length ratios ranging from 1:1 to 2:1. The anchor capacity estimates and interaction relationships were developed based on finite-element studies and upper bound plastic limit analyses. Interaction relationships developed from the numerical and analytical studies were fitted to a simple six degrees-of-freedom yield locus equation. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...] [article] Undrained capacity of plate anchors under general loading [texte imprimé] / Ming Yang, Auteur ; James Donald Murff, Auteur ; Charles Paul Aubeny, Auteur . - 2010 . - pp. 1383-1393. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 10 (Octobre 2010) . - pp. 1383-1393 Mots-clés : Plate  anchors  Load  bearing  capacity  Plasticity  Offshore  engineering  Finite  element  method  Limit  analyses  Three-dimensional  loading Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Under general conditions of loading, a plate anchor is subjected to six degrees of freedom of loading, three force components and three moment components. Prediction of the anchor performance under general conditions of loading requires realistic estimates of the anchor pullout capacity for each individual load component as well as the interaction effects when these loads are applied in combination. This paper presents an analysis of plate anchor capacity under these general conditions of loading. The study considers a range of plate width-to-length ratios ranging from 1:1 to 2:1. The anchor capacity estimates and interaction relationships were developed based on finite-element studies and upper bound plastic limit analyses. Interaction relationships developed from the numerical and analytical studies were fitted to a simple six degrees-of-freedom yield locus equation. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...]