By Shinobu Yoshimura, Muneo Hori, Makoto Ohsaki
Huge earthquakes and tsunamis have triggered severe harm to big buildings similar to civil infrastructure parts, constructions and gear vegetation all over the world. To quantitatively overview such harm procedures and to layout potent prevention and mitigation measures, the newest high-performance computational mechanics applied sciences, which come with telascale to petascale pcs, can provide strong instruments. The phenomena lined during this publication comprise seismic wave propagation within the crust and soil, seismic reaction of infrastructure components resembling tunnels contemplating soil-structure interactions, seismic reaction of high-rise constructions, seismic reaction of nuclear energy vegetation, tsunami run-up over coastal cities and tsunami inundation contemplating fluid-structure interactions. The ebook offers all useful details for addressing those phenomena, starting from the basics of high-performance computing for finite aspect tools, key algorithms of actual dynamic structural research, fluid flows with unfastened surfaces, and fluid-structure interactions, to functional purposes with designated simulation effects. The publication will supply crucial insights for researchers and engineers operating within the box of computational seismic/tsunami engineering.
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Additional info for High-Performance Computing for Structural Mechanics and Earthquake/Tsunami Engineering
Concluding remarks are provided in Sect. 4. 1 Target Equation Underground structure is modeled as a layered medium, each layer of which often has complicated geometries because the thickness changes on the order of 10 1 1 m in a 100 1 m region. FEM with unstructured low-order solid elements is suitable for analyzing the response of such a medium together with satisfying traction-free boundary condition on the surface. Here, we use a nonlinear dynamic FEM with three-dimensional (3D) unstructured low-order solid elements for the seismic wave amplification simulation.
The structural seismic response simulation of man-made structures, which is directly related to estimate of an earthquake disaster, is also being realized [35, 36]; an analysis model is automatically constructed for every building and structure using urban area digital information (which is stored in a form of Geographical Information System). Urban area seismic response is then computed as an assembly of structural seismic responses of all the buildings and structures. A good example is the Tokyo simulation , in which nonlinear responses of 253,405 buildings are Fig.
Because FEM readily analyzes a body of complex structures, it is often used for numerical simulations of long-period earthquake motion. However, as demonstrated here, if the observation points are far from the source point in terms of 40 M. Hori et al. Fig. 8 3D model of actual crust structure problem Fig. 9 Mesh configuration of actual crust structure problem. Number of nodes, tetrahedron elements, and hexahedron elements are 3,122,675, 4,643,138, and 2,257,905 wavelength, large errors in the envelope and phase may occur.