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chap01 - Bauhaus Universitt Weimar Prof Bodenmechanik...

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Bauhaus - Universität Weimar, Prof. Bodenmechanik, Dr.-Ing. H.-G. Schmidt Content of lecture „Soil Dynamics“ (Master course: 2 Semester) 1. Introduction in the fundamentals of the soil dynamics and dynamic loads (traffic, earthquake etc.) 2. Classification and description of mechanical vibrations Description in time- and frequency domain 3. Vibration of systems Models, equations of motions, solutions in the time- and frequency domain 4. Linear single degree of freedom lumped mass systems (linear SDOF) free and forced vibrations, response spectra, eigenvalues, modal analysis 5. Linear multi degree of freedom lumped mass systems forced vibrations, eigenvalues, modal analysis 6. Wave propagation in the soil - Free vibration of the layered halfspace 3D-,2D-,1D- propagation of body waves, Amplification and filtering processes, surface waves, amplification functions 7. Dynamical behaviour of materials, dynamical soil parameter Elasticity, Damping, Stiffness, nonlinearities, experimental evaluations 8. Forced vibrations of the halfspace Models, Block vibrations, Impedance’s, examples 9. Dynamical soil-structure-interaction Modelling, Substructure method, examples 10. Design of the machine foundations Modelling, dynamic loads, eigenvalues, tuning of the frequencies, analysis of dynamic response, calculations of block foundations 11. Geotechnical earthquake engineering Natural seismicity Intensities, geoseismical effects and damages, site dependent influences: filtering and amplifications, Microzonation, Design of buildings and foundations, repair and strengthening measures, geotechnical investigations Effects of mining on surface and buildings (regular, iirregular, seismic); Building design and special measures for the foundations, repair measures 12. Shock vibrations on buildings and people measurements and evatuations, measures for mitigation / reduction
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Bauhaus-Universität Weimar, Prof. Bodenmechanik, Dr. H.-G. Schmidt 1.1 1. Introduction in soil dynamics and dynamic loadings 1.1 Overview, problems 1.1.1 Dynamic loadings 1 Time history Example Typical dynamic loads (a) harmonic (b) periodic (c) impuls load (d) stochastic Machines in Buildings Ship´s propeller water waves Air pressure of a bomb explosion Earthquakes
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Bauhaus-Universität Weimar, Prof. Bodenmechanik, Dr. H.-G. Schmidt 1.2 1.1.2 General problems a) Prevention of resonances Classical field: tuning of frequencies of machine foundations b)
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