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Simplified Analysis of Concrete Covering Dynamic Response under Grouting Pressure Fluctuating Load
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    Abstract:

    In order to address the dam concrete covering uplift effect caused by the dynamic load of grouting pressure, in which the dam concrete covering will damage the anti-seepage properties of the dam, a simplified model was developed for the hysteretic nonlinear dynamic response analysis of concrete covering under consolidation grouting pressure fluctuating load. The nonlinearity, hysteresis, accumulated deformation and stiffness degeneration characteristics of concrete covering under grouting pressure fluctuating load were considered. Then, the Bouc-Wen degradation hysteresis model was adopted to analyze the hysteretic effect of nonlinear dynamic response of concrete covering by considering the soil and rock stratum under the concrete covering with different stiffness and damping coefficients. According to the actual grouting parameters, the result shows that the predictions of the model are in very good agreement with values measured from experiments.

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  • Received:
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  • Online: January 27,2015
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