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  • JOURNAL ARTICLE
    Aghakouchakn A, Sim WW, Jardine RJ, 2015,

    Stress-path laboratory tests to characterise the cyclic behaviour of piles driven in sands

    , SOILS AND FOUNDATIONS, Vol: 55, Pages: 917-928, ISSN: 0038-0806
  • JOURNAL ARTICLE
    Allen PA, Armitage JJ, Whittaker AC, Michael NA, Roda-Boluda D, D'Arcy Met al., 2015,

    Fragmentation Model of the Grain Size Mix of Sediment Supplied to Basins

    , JOURNAL OF GEOLOGY, Vol: 123, Pages: 405-427, ISSN: 0022-1376
  • JOURNAL ARTICLE
    Alqahtani FA, Johnson HD, Jackson CA-L, Som MRBet al., 2015,

    Nature, origin and evolution of a Late Pleistocene incised valley-fill, Sunda Shelf, Southeast Asia

    , SEDIMENTOLOGY, Vol: 62, Pages: 1198-1232, ISSN: 0037-0746
  • JOURNAL ARTICLE
    Armitage JJ, Allen PA, Burgess PM, Hampson GJ, Whittaker AC, Duller RA, Michael NAet al., 2015,

    SEDIMENT TRANSPORT MODEL FOR THE EOCENE ESCANILLA SEDIMENT-ROUTING SYSTEM: IMPLICATIONS FOR THE UNIQUENESS OF SEQUENCE STRATIGRAPHIC ARCHITECTURES

    , JOURNAL OF SEDIMENTARY RESEARCH, Vol: 85, Pages: 1510-1524, ISSN: 1527-1404
  • JOURNAL ARTICLE
    Armitage JJ, Ferguson DJ, Goes S, Hammond JOS, Calais E, Rychert CA, Harmon Net al., 2015,

    Upper mantle temperature and the onset of extension and break-up in Afar, Africa

    , EARTH AND PLANETARY SCIENCE LETTERS, Vol: 418, Pages: 78-90, ISSN: 0012-821X
  • BOOK CHAPTER
    Asphaug E, Collins GS, Jutzi M, 2015,

    Global Scale Impacts

    , Asteroids IV, Editors: Michel, DeMeo, Bottke, Publisher: University of Arizona Press, Pages: 661-678, ISBN: 9780816532131

    Global scale impacts modify the physical or thermal state of a substantial fraction of a target asteroid. Specific effects include accretion, family formation, reshaping, mixing and layering, shock and frictional heating, fragmentation, material compaction, dilatation, stripping of mantle and crust, and seismic degradation. Deciphering the complicated record of global scale impacts, in asteroids and meteorites, will lead us to understand the original planet-forming process and its resultant populations, and their evolution in time as collisions became faster and fewer. We provide a brief overview of these ideas, and an introduction to models.

  • JOURNAL ARTICLE
    Bommer JJ, Coppersmith KJ, Coppersmith RT, Hanson KL, Mangongolo A, Neveling J, Rathje EM, Rodriguez-Marek A, Scherbaum F, Shelembe R, Stafford PJ, Strasser FOet al., 2015,

    A SSHAC Level 3 Probabilistic Seismic Hazard Analysis for a New-Build Nuclear Site in South Africa

    , EARTHQUAKE SPECTRA, Vol: 31, Pages: 661-698, ISSN: 8755-2930
  • JOURNAL ARTICLE
    Bora SS, Scherbaum F, Kuehn N, Stafford P, Edwards Bet al., 2015,

    Development of a Response Spectral Ground-Motion Prediction Equation (GMPE) for Seismic-Hazard Analysis from Empirical Fourier Spectral and Duration Models

    , BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, Vol: 105, Pages: 2192-2218, ISSN: 0037-1106
  • CONFERENCE PAPER
    Byrne BW, McAdam R, Burd HJ, Houlsby GT, Martin CM, Zdravković L, Taborda DMG, Potts DM, Jardine RJ, Sideri M, Schroeder FC, Gavin K, Doherty P, Igoe D, Muirwood A, Kallehave D, Skov Gretlund Jet al., 2015,

    New design methods for large diameter piles under lateral loading for offshore wind applications

    , Pages: 705-710

    © 2015 Taylor and Francis Group, London. Offshore wind turbines are typically founded on single large diameter piles, termed monopiles. Pile diameters of between 5mand 6mare routinely used, with diameters of up to 10 m, or more, being considered for future designs. There are concerns that current design approaches, such as the p − y method, which were developed for piles with a relatively large length to diameter ratio, may not be appropri ate for large diameter monopiles. A joint industry project, PISA (PIle Soil Analysis), has been established to develop new design methods for large diameter monopiles under lateral loading. The project involves three strands of work; (i) numerical modelling; (ii) development of a new design method; (iii) field testing. This paper describes the framework on which the new design method is based. Analyses conducted using the new design method are compared with methods used in current practice.

  • CONFERENCE PAPER
    Byrne BW, Mcadam RA, Burd HJ, Houlsby GT, Martin CM, Gavin K, Doherty P, Igoe D, Zdravkovic L, Taborda DMG, Potts DM, Jardine RJ, Sideri M, Schroeder FC, Wood AM, Kallehave D, Gretlund JSet al., 2015,

    Field testing of large diameter piles under lateral loading for offshore wind applications

    , Pages: 1255-1260

    © The authors and ICE Publishing: All rights reserved, 2015. Offshore wind power in the UK, and around Europe, has the potential to deliver significant quantities of renewable energy. The foundation is a critical element in the de sign. The most common foundation design is a single large diameter pile, termed a monopile. Pile diameters of between 5m and 6m are routinely used, with diameters up to 10m or more, being considered for future designs. Questions have been raised as to whether current design methods for lateral loading are relevant to these very large diameter piles. To explore this problem a joint industry project, PISA, co-ordinated by DONG Energy and the Carbon Trust, has been established. The aim of the project is to develop a new design framework for laterally loaded piles based on new theoretical developments, numerical modelling and bench- marked against a suite of large scale field pile tests. The project began in August 2013 and is scheduled to complete during 2015. This paper briefly outlines the project, focusing on the design of the field testing. The testing involves three sizes of pile, from 0.27m in diameter through to 2.0m in diameter. Two sites will be used; a stiff clay site and a dense sand site. Tests will include monotonic loading and cyclic loading. A suite of site investigation will be carried out to aid interpretation of the field tests, and will involve in-situ testing, standard laboratory testing and more advanced laboratory testing.

  • JOURNAL ARTICLE
    Castelltort S, Whittaker AC, Verges J, 2015,

    Tectonics, sedimentation and surface processes: from the erosional engine to basin deposition

    , Earth Surface Processes and Landforms, Vol: 40, Pages: 1839-1846, ISSN: 1096-9837
  • JOURNAL ARTICLE
    Civiero C, Hammond JOS, Goes S, Fishwick S, Ahmed A, Ayele A, Doubre C, Goitom B, Keir D, Kendall J-M, Leroy S, Ogubazghi G, Ruempker G, Stuart GWet al., 2015,

    Multiple mantle upwellings in the transition zone beneath the northern East-African Rift system from relative P-wave travel-time tomography

    , GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, Vol: 16, Pages: 2949-2968, ISSN: 1525-2027
  • JOURNAL ARTICLE
    Colombero R, Kontoe S, Foti S, Potts DMet al., 2015,

    Numerical modelling of drop load tests

    , SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, Vol: 77, Pages: 279-289, ISSN: 0267-7261
  • CONFERENCE PAPER
    Colombero R, Kontoe S, Foti S, Potts DMet al., 2015,

    Numerical modelling of wave attenuation through soil

    , Pages: 3959-3964

    © The authors and ICE Publishing: All rights reserved, 2015. Numerical analyses of induced ground vibrations play an important role in assessing building safety and comfort. One of the major difficulties is related to the calibration of an adequate source model to be used in the numerical simulation. In this paper the attenuation of waves caused by drop load tests is considered to provide a general framework for the evaluation of vibration attenuation both with empirical laws and numerical simulations. A new equation to reproduce the source signal is suggested and used as input for a dynamic coupled consolidation Finite Element Analysis. The model is validated through comparison with field data obtained at a site in the vicinity of the Tower of Pisa, Italy, from geophones at various distances from the impact source. The calibrated numerical model is then used to study in detail the attenuation of waves from the source and assess the validity of empirical attenuation laws.

  • JOURNAL ARTICLE
    Corbett LB, Bierman PR, Lasher GE, Rood DHet al., 2015,

    Landscape chronology and glacial history in Thule, northwest Greenland

    , QUATERNARY SCIENCE REVIEWS, Vol: 109, Pages: 57-67, ISSN: 0277-3791
  • JOURNAL ARTICLE
    Craske J, Debugne ALR, van Reeuwijk M, 2015,

    Shear-flow dispersion in turbulent jets

    , JOURNAL OF FLUID MECHANICS, Vol: 781, Pages: 28-51, ISSN: 0022-1120
  • JOURNAL ARTICLE
    Craske J, van Reeuwijk M, 2015,

    Energy dispersion in turbulent jets. Part 1. Direct simulation of steady and unsteady jets

    , JOURNAL OF FLUID MECHANICS, Vol: 763, Pages: 500-537, ISSN: 0022-1120
  • JOURNAL ARTICLE
    Craske J, van Reeuwijk M, 2015,

    Energy dispersion in turbulent jets. Part 2. A robust model for unsteady jets

    , JOURNAL OF FLUID MECHANICS, Vol: 763, Pages: 538-566, ISSN: 0022-1120
  • CONFERENCE PAPER
    Cui W, Gawecka KA, Potts DM, Taborda DMG, Zdravković Let al., 2015,

    Numerical modelling of open-loop ground source energy systems

    , Pages: 2523-2528

    © The authors and ICE Publishing: All rights reserved, 2015. The environmental and economic benefits of utilising the ground for extracting and storing heat have been known for a long time. However, only recently have government sustainability policies and rising energy prices encouraged the use of this renewable energy resource. In open-loop systems water is abstracted from one well and re-injected into another after exchanging energy with a building's heating/cooling system using a heat pump. In order to guarantee a good performance of the system, it is fundamental that the possibility of thermal breakthrough occurring is minimised, i.e. that the temperature of the water being abstracted remains unaffected by the injection of warmer/cooler water at the other well. In this paper, the Imperial College Finite Element Program (ICFEP), which is capable of simulating fully coupled thermo-hydro-mechanical behaviour of porous materials, was used to perform two-dimensional analyses of open- loop ground source heat systems. The parametric studies carried out highlight the relative impact on the occurrence of thermal breakthrough of the hydraulic ground conditions and the geometric characteristics of the system, providing an invaluable insight into possible improvements to the current design procedure.

  • JOURNAL ARTICLE
    D'Arcy M, Boluda DCR, Whittaker AC, Carpineti Aet al., 2015,

    Dating alluvial fan surfaces in Owens Valley, California, using weathering fractures in boulders

    , EARTH SURFACE PROCESSES AND LANDFORMS, Vol: 40, Pages: 487-501, ISSN: 0197-9337

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