Open Access Repositories: Recent submissions

Now showing items 461-480 of 4204

  • Supporting design planning through process model simulation 

    Flanagan, Tomás Leo (University of CambridgeChurchill CollegeDepartment of Engineering, 2007-02-13)
    Modelling and analysis of design processes is non-trivial and predicting the behaviour of such systems is especially challenging. Nonetheless, the effective planning of design projects is critical for many engineering ...

  • Application of mixed-integer programming in chemical engineering 

    Pogiatzis, Thomas (University of CambridgeDepartment of Chemical Engineering and Biotechnology, 2013-06-11)
    Mixed-Integer Programming has been a vital tool for the chemical engineer in the recent decades and is employed extensively in process design and control. This dissertation presents some new Mixed-Integer Programming ...

  • Fibre-reinforced polymers in reinforced and prestressed concrete applications: moving forward 

    Lees, Janet Marillyn (John Wiley & Sons, Ltd.Progress in Structural Engineering and Materials, 2001)
    Recent developments in the use of fibre-reinforced polymers (FRPs) in reinforced and prestressed concrete applications are reviewed. The influence of FRP material properties on the design of concrete structures is considered ...

  • Face recognition using Hidden Markov Models 

    Samaria, Ferdinando Silvestro (University of CambridgeDepartment of EngineeringTrinity College, 1995-02-14)
    This dissertation introduces work on face recognition using a novel technique based on Hidden Markov Models (HMMs). Through the integration of a priori structural knowledge with statistical information, HMMs can be used ...

  • Flexural Fatigue Performance of CFRP Prestressed Concrete Poles 

    Roberts, EE; Lees, Janet Marillyn; Hoult, NA (Multi-Science PublishingAdvances in Structural Engineering, 2012-04-24)
    Carbon fibre reinforced polymer (CFRP) prestressed concrete poles offer a durable, light-weight alternative to conventional steel-reinforced or prestressed concrete poles. In particular, the corrosion resistance of the ...

  • Mixing and internal dynamics of droplets impacting and coalescing on a solid surface 

    Castrejón-Pita, JR; Kubiak, KJ; Castrejón-Pita, AA; Wilson, MCT; Hutchings, Ian Michael (American Physical SocietyPhysical Review E, 2013-08-26)
    The coalescence and mixing of a sessile and an impacting liquid droplet on a solid surface are studied experimentally and numerically in terms of lateral separation and droplet speed. Two droplet generators are used to ...

  • Shear strength of reinforced concrete wall-beam structures: upper- bound analysis and experiments 

    Bin Mohamed, Zainai (University of CambridgeDowning CollegeDepartment of Engineering, 1987-10-27)
    This study presents rigid-plastic methods of analysis of shear failure in reinforced concrete (R. C.) wall-beam type structures when subjected to in-plane loading. The upper-bound approach is emphasised. Present shear ...

  • Precracked RC T-beams Repaired in Shear with Externally Bonded CFRP Sheets 

    Dirar, Samir; Lees, Janet M.; Morley, Chris T. (American Concrete InstituteACI Structural Journal, 2012-03-01)
    This study investigates the structural behavior of precracked reinforced concrete (RC) T-beams strengthened in shear with externally bonded carbon fiber-reinforced polymer (CFRP) sheets. It reports on seven tests on ...

  • Precracked RC T-beams Repaired in Shear with Prestressed CFRP Straps 

    Dirar, Samir; Lees, Janet Marillyn; Morley, Chris T (American Concrete InstituteACI Structural Journal, 2013-09-01)
    The results of an experimental and numerical investigation involving unstrengthened reinforced concrete (RC) T-beams and precracked RC T-beams strengthened in shear with prestressed carbon fiber-reinforced polymer (CFRP) ...

  • CFRP prestressed concrete lighting columns 

    Terrasi, GP; Lees, Janet Marillyn (American Concrete InstituteField Applications of FRP Reinforcement: Case Studies, 2003)

  • Non-laminated FRP Strap Elements for Reinforced Concrete, Timber and Masonry Applications 

    Lees, Janet Marillyn; Winistörfer, AU (American Society of Civil EngineersJournal of Composites for Construction, 2010-05-11)
    Advances in material technology allow for the exploration of new structural forms and systems. In recent years, fiber-reinforced polymers (FRPs) have emerged as candidate materials for civil engineering applications, and ...

  • The elastic and plastic behaviour of cellular materials 

    Gibson, Lorna Jane (University of CambridgeChurchill CollegeDepartment of Engineering, 1981-11-10)
    Cellular materials are widespread. Some, like wood and bone, occur in nature, while others, like polymeric foams, are manmade. Because of their cellular structure, they have unusual mechanical properties: they can be stiff, ...

  • Water, salt water and alkaline solution uptake in epoxy thin films 

    Scott, P; Lees, Janet Marillyn (WileyJournal of Applied Polymer Science, 2013-05-10)
    As a means of characterizing the diffusion parameters of fiber reinforced polymer (FRP) composites within a relatively short time frame, the potential use of short term tests on epoxy films to predict the long-term behavior ...

  • Uptake induced swelling and thermal expansion of CFRP tendons 

    Scott, P; Lees, Janet Marillyn (Institute of Civil EngineersProceedings of ICE, Structures and Buildings, 2009)
    Carbon-fibre-reinforced polymer (CFRP) tendons can be used as a corrosion-resistant alternative to steel for reinforcing or prestressing concrete in aggressive marine environments. The design lives of many civil marine ...

  • External prestressed carbon fiber-reinforced polymer straps for shear enhancement of concrete 

    Lees, Janet Marillyn; Winistoerfer, AU; Meier, U (American Society of Civil EngineersJournal of Composites for Construction (ASCE), 2002)
    The use of fiber-reinforced polymers (FRPs) for the strengthening and repair of existing concrete structures is a field with tremendous potential. The materials are very durable and, hence, ideally suited for use as external ...

  • Time-Dependent Behavior of RC Beams Retrofitted with CFRP Straps 

    Hoult, Neil A; Lees, Janet Marillyn (American Society of Civil EngineersJournal of Composites in Construction, 2010-07-16)
    A retrofitting technique that uses prestressed unbonded carbon-fiber-reinforced polymer (CFRP) straps to provide additional shear capacity has previously been shown to be successful under short-term static loading conditions. ...

  • Efficient CFRP strap configurations for the shear strengthening of RC T-beams 

    Hoult, Neil Anthony; Lees, Janet Marillyn (American Society of Civil EngineersASCE Journal of Composites for Construction, 2009)
    A prestressed carbon fiber-reinforced polymer (CFRP) strap retrofitting system has been found to significantly enhance the shear capacity of existing reinforced concrete beams. In previous studies, the CFRP straps were ...

  • Experimental behavior of reinforced concrete beams strengthened with prestressed CFRP shear straps 

    Kesse, GK; Lees, Janet Marillyn (American Society of Civil EngineersJournal of Composites for Construction (ASCE), 2007)
    One promising means of increasing the capacity of existing shear-deficient beams is to strengthen the structure using external prestressed carbon fiber reinforced polymer (CFRP) straps. In this system, layers of CFRP tape ...

  • Modelling of an unbonded CFRP strap shear retrofitting system for RC beams 

    Hoult, Neil Anthony; Lees, Janet Marillyn (American Society of Civil EngineersASCE Journal of Composites for Construction, 2009)
    A retrofitting technique has been developed that uses carbon fiber-reinforced polymer (CFRP) straps to increase the shear capacity of reinforced concrete beams. The vertical straps are not bonded to the beam but are instead ...

  • Phased Nonlinear Finite-Element Analysis of Precracked RC T-Beams Repaired in Shear with CFRP Sheets 

    Dirar, Samir; Lees, Janet Marillyn; Morley, Chris (American Society of Civil EngineersJournal of Composites for Construction, 2012-10-17)
    Phased nonlinear finite-element (FE) analyses were carried out to predict the behavior of precracked reinforced concrete (RC) T-beams repaired in shear with externally bonded (EB) carbon fiber–reinforced polymer (CFRP) ...