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دینامیک خاک و مهندسی زلزله 2011
جزئیات رویداد
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  • experimental synthesis of seismic horizontal free-field motion of soil in finite-domain simulations with absorbing boundary

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 873
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    • شماره تماس دبیرخانه رویداد: -
     in this paper, a fundamental assessment of the method of physical wave-absorbing boundary and centrifuge modeling is presented in the context of experimental simulations of seismic free-field ground motion. focusing on the characteristics of a sand stratum, a series of seismic tests on models of uniform density and a large width-to-depth ratio with duxseal as the side boundary were performed using an in-box shake-table system. by means of the transfer function approach in the frequency domain, the complex three-dimensional nature of the dynamic response of the finite soil model with the boundary treatment is demonstrated in terms of its variable resonant frequency distribution at different g-levels. apart from being helpful in quantifying the difficulty in interpreting the finite-domain response simulations using one-dimensional theories or homogenized representations, the measured data substantiates the need and usefulness of coupling the duxseal boundary approach with a three-dimensional elastodynamic synthesis. with the aid of a corresponding boundary element implementation, the feasibility of identifying the soil's in-flight shear modulus variation, poisson's ratio and horizontal-to-vertical earth pressure ratio from the centrifuge model's free-field measurements is also explored.

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