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27 articles for “Confinement”
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Research ArticleOpen accessEvery word in the titleExperimental Study of Composite Beams Made of Steel Tubes Filled with Concrete under the Confinement Effect of U-Links and Stud-PlateMoayyad Al-Nasra, Madiha Ammari, Taher Abu-Lebdeh, Abdelqader NajmiConcrete strength improved substantially when lateral confinement stresses are provided. This effect has been exploited in this study in composite beams at the concrete compression zone. New type of confinement is used in this research. The confinement of concrete in the compression zone is accomplished by providing U-links and stud-plate systems. The U-links are steel bars in the shape of … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 1 · 20 Mar 2017 · 7,259 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAnalysis of the Interaction between the Lining of a TBM Tunnel and the Ground Using the Convergence-Confinement MethodPierpaolo OresteThe support used when a tunnel is excavated by a shielded TBM is complex because it consists of two different materials: A concrete segmental lining and a filler annulus between the lining and the tunnel wall. A detailed analysis of the behavior of such a support system requires a three-dimensional numerical modeling and should also consider the presence of the … …American Journal of Applied Sciences, Vol. 12, Issue 4 · 17 Jun 2015 · 7,183 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Numerical Approach for Evaluating the Convergence-Confinement Curve of a Rock Tunnel Considering Hoek-Brown Strength CriterionPierpaolo OresteThe convergence-confinement method is frequently used for the analysis of the behavior of a tunnel and to define the support structures necessary to guarantee its stability. The reasons why it is used extensively, at least in the preliminary study phases of a tunnel are: The fundamental parameters of the problem (the diameter and depth of the tunnel, as well as … …American Journal of Applied Sciences, Vol. 11, Issue 12 · 14 Jan 2015 · 6,642 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Determination of the Tunnel Structure Loads Through the Analysis of the Interaction between the Void and the Support Using the Convergence-Confinement MethodPierpaolo OresteThe evaluation of the load acting on a tunnel support is of fundamental importance for the correct dimensioning of the structure when analytical calculation methods are used. The load acting on the support depends on various factors and for this reason its evaluation can appear somewhat complex. One way of evaluating the load acting on a support is to use … …American Journal of Applied Sciences, Vol. 11, Issue 11 · 7 Jan 2015 · 6,808 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleContributions on Laser Driven Inertial Confinement FusionHeinrich HoraThe following modified preprint of a chapter in the forthcoming book by Guillermo Velarde and Natividad Carpintero Santamaria Inertial Confinement Nuclear Fusion: A Historical Approach by its Pioneers with personal comments is presented here as an example about the long years difficult developments towards the aim for producing unlimited, safe and clean nuclear energy in the same way as it … …American Journal of Applied Sciences, Vol. 2, Issue 6 · 30 Jun 2005 · 7,106 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMORINGA TEA BLOCKS ACUTE LUNG INFLAMMATION INDUCED BY SWINE CONFINEMENT DUST THROUGH A MECHANISM INVOLVING TNF-α EXPRESSION, C-JUN N-TERMINAL KINASE ACTIVATION AND NEUTROPHIL REGULATIONMykea Mcknight, Jabria Allen, Jenora T. Waterman et al.Plant based products represent a promising alternative to conventional treatments for inflammation. Moringa oleifera Lam is a tree rich in proteins, vitamins, minerals and a variety of phytochemcals with health benefits. Among the reported health benefits are antioxidant and anti-inflammatory properties. The purpose of this study was to investigate whether tea brewed from dried Moringa leaves would abrogate inflammation in … …American Journal of Immunology, Vol. 10, Issue 2 · 8 May 2014 · 11,600 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Convergence-Confinement Method: Roles and Limits in Modern Geomechanical Tunnel DesignPierpaolo OresteThe convergence-confinement method, based on the analysis of the stress and strain state that develops in the rock around a circular tunnel, has been presented in this study with the two analytical solutions that have been most frequently used in recent years. Problem statement: Thanks to the increased power of electronic processors and the spread of numerical methods, the role … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 10,151 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Confinement on the Axial Performance of Fibre Reinforced Polymer Wrapped RC ColumnA. Rajasekaran, P.N. Raghunath, K. SugunaThe combined effect of internal steel ties and external FRP wrap was investigated using nine reinforced concrete columns with varying thickness of external wrap. The load, deflection and lateral expansions were studied at yield state and ultimate state. The results from the experimental investigations were used for performing a multi-variate linear regression analysis incorporating the contribution of tie spacing as … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2008 · 7,566 accessesView PDFCite
Research ArticleOpen accessIn the keywordsAssessment of Asthma Control in Children During the COVID-19 Pandemic: A Cross-Sectional Study at a Pediatric Hospital in Marrakech (Morroco)Maryem Labyad, Karima El Fakiri, Abdelmounaim Baslam et al.Effective management of childhood asthma relies on regular and objective assessments to ensure optimal control. However, the implementation of containment measures during the COVID-19 pandemic has led to the postponement of pediatric consultations, posing significant challenges for children with asthma. This study aimed to evaluate asthma control among children attending pediatric consultations at the mother-child hospital in Marrakech during the … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 5 Jun 2024 · 4,895 accessesView PDFCite
Research ArticleOpen accessIn the keywordsANSYS Numerical Modeling of Confined Deep Beam with High Strength ConcreteSyahril Taufik, Elia Anggarini, Ichwan SetiawanIn the numerical modeling presented, the deep beam is accounted for by means of a three dimensional FEA ANSYS 13.0 approach, in which the structure is modeled with load-displacement-based solid finite elements, whereas the internal work structure interacted by high strength concrete and reinforcement in full scale. Most deep beam collapse is dominated by the shear brittle collapse. Recently, confinement … …International Journal of Structural Glass and Advanced Materials Research, Vol. 4, Issue 1 · 10 Feb 2020 · 6,953 accessesView PDFCite