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Book chapterMarano GC, Sgobba S, Stafford PJ, et al., 2009,
Seismologically consistent stochastic spectra
, New Trends in Seismic Design of Structures, Editors: Lagaros, Tsompanakis, Papadrakakis, Publisher: Saxe-Cobourg -
Conference paperGorman GJ, Pain CC, Piggott MD, et al., 2009,
Interleaved parallel tetrahedral mesh optimisation and dynamic load-balancing
, Brussels, Belgium, the fourth International Conference on Adaptive Modeling and Simulation -
Journal articleStafford PJ, Berrill JB, Pettinga JR, 2009,
New predictive equations for Arias Intensity from crustal earthquakes in New Zealand
, Journal of Seismology, Vol: 13, Pages: 31-52, ISSN: 1383-4649 -
Journal articlevan Reeuwijk M, Mathias SA, Simmons CT, et al., 2009,
Insights from a pseudospectral approach to the Elder problem
, WATER RESOUR RES, Vol: 45, W0441, ISSN: 0043-1397The aim of this paper is to clarify and circumvent the issue of multiple steady state solutions in the Elder problem. A pseudospectral method is used to avoid numerical error associated with spatial discretization. The pseudospectral method is verified by comparison to an analytical solution at Rayleigh number, Ra = 0, and by reproducing the three stable steady state solutions that are known to exist at Ra = 400. A bifurcation diagram for 0 < Ra < 400 which is free of discretization error, confirms that multiple steady states are indeed an intrinsic characteristic of the Elder problem. The existence of multiple steady states makes the Ra = 400 Elder problem less suitable for benchmarking numerical models. To avoid the multiple steady states, we propose a benchmark at Ra = 60. The results for this Low Rayleigh Number Elder Problem are presented and compared to simulations with the commercial groundwater modeling package FEFLOW. Correspondence between the pseudospectral model and FEFLOW is excellent.
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Journal articleFarrell PE, Piggott MD, Pain CC, et al., 2009,
Conservative interpolation between unstructured meshes via supermesh construction
, Computer Methods in Applied Mechanics and Engineering, Vol: 198, Pages: 2632-2642 -
Journal articleChristeson GL, Collins GS, Morgan JV, et al., 2009,
Mantle deformation beneath the Chicxulub impact crater
, Earth and Planetary Science Letters, Vol: 284, Pages: 249-257, ISSN: 0012-821X -
Book chapterBommer JJ, Stafford PJ, 2009,
Seismic hazard and earthquake actions
, Seismic Design of Buildings to Eurocode 8, Editors: Elghazouli, Oxon, UK, Publisher: Spon Press, Pages: 6-46, ISBN: 978-0-415-44762-1 -
Journal articleStafford PJ, Sgobba S, Marano GC, 2009,
An energy-based envelope function for the stochastic simulation of earthquake accelerograms
, Soil Dynamics and Earthquake Engineering, Vol: 29, Pages: 1123-1133, ISSN: 0267-7261 -
Journal articleKontoe S, Zdravkovic L, Potts DM, 2009,
An assessment of the Domain Reduction Method as an advanced boundary condition and common pitfalls in the use of conventional absorbing boundaries
, International Journal for Numerical and Analytical Methods in Geomechanics, Vol: 33, Pages: 309-330 -
Journal articleBommer JJ, Stafford PJ, Alarcón JE, 2009,
Empirical equations for the prediction of the Significant, Bracketed and Uniform duration of earthquake ground motion
, Bulletin of the Seismological Society of America, Vol: 99, Pages: 3217-3233, ISSN: 0037-1106 -
Journal articleStafford PJ, Bommer JJ, 2009,
Empirical equations for the prediction of the equivalent number of cycles of earthquake ground motion
, Soil Dynamics and Earthquake Engineering, Vol: 29, Pages: 1425-1436 -
Journal articleZolghadr Jahromi H, Izzuddin BA, Zdravkovic L, 2009,
A domain decomposition approach for coupled modelling of nonlinear soil–structure interaction
, Computer Methods in Applied Mechanics and Engineering, Vol: 198, Pages: 2738-2749, ISSN: 1425-1655 -
Conference paperSgobba S, Stafford PJ, Marano GC, 2009,
Seismological scenario-based envelope function for stochastic modelling of seismic signals
, COMPDYN 2009: 2nd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering -
Journal articleFang F, Pain CC, Navon IM, et al., 2009,
A POD reduced-order 4D-Var adaptive mesh ocean modelling approach
, Int. J. Numer. Meth. Fluids, Vol: 60, Pages: 709-732This paper presents a novel approach for inverting a complex ocean model via a proper orthogonal decomposition. The inversion is achieved through the construction of an adjoint model and used to assimilate data in a similar manner to that used in weather forecasting. This is an incredibly important capability for an ocean model, however it is both complex to construct and also can be computationally expensive. The approach proposed here addresses both of these important issues by constructing an efficient and easy to compute adjoint directly from the reduced order model. The approach is demonstrated by inverting for initial conditions in an ocean gyre simulation. The methodology proposed here led directly to the award of a £1M EPSRC grant (EP/I00405X) to develop reduced order and adjoint models for coastal oceanography. Cited 11 times.
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Journal articleMathias SA, van Reeuwijk M, 2009,
Hydraulic fracture propagation with 3-D leak-off
, TRANSPORT POROUS MED, Vol: In Press, ISSN: 0169-3913 -
Conference paperKontoe S, Zdravkovic L, Potts DM, et al., 2009,
Comparison of constitutive models through a case study on seismic response of tunnels
, International Conference on Performance-Based Design in Earthquake Geotechnical Engineering – from case history to practice., Pages: 1051-1059 -
Journal articleFang F, Pain CC, Navon IM, et al., 2009,
A POD reduced order unstructured mesh ocean modelling method for moderate Reynolds number flows
, Ocean Modelling, Vol: 28, Pages: 127-136, ISSN: 1463-5003 -
Conference paperTaborda D, Kontoe S, Zdravkovic L, et al., 2009,
Application of cyclic nonlinear elastic models to site response analysis
, 1st International Symposium on Computational Geomechanics, Pages: 956-966 -
Conference paperStafford PJ, Bommer JJ, 2009,
Theoretical consistency of common record selection strategies in Performance-based Earthquake Engineering
, 1st ACES Workshop on Advances in Performance-based Earthquake Engineering -
Journal articleAldama-Bustos G, Bommer JJ, Fenton CH, et al., 2009,
Probabilistic seismic hazard analysis for rock sites in the cities of Abu Dhabi, Dubai and Ra's Al Khaymah, United Arab Emirates
, GEORISK, Vol: 3, Pages: 1-29, ISSN: 1749-9518
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