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Prediction of boundary zone parameters and soil-pile separation under horizontal and rocking vibrations

机译:水平和摇摆振动下边界带参数和土桩分离的预测

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This paper attempts to study the dynamic soil-pile interaction on the non-linear response under coupled vibration by both experimental and analytical study. Dynamic response characteristics of reinforced concrete piles under varying levels of vertical and horizontal harmonic excitation are investigated in the present study. Single and group (2 × 2) piles are used in the investigation. The horizontal exciting force applied on the pile cap through the oscillator causes coupled motion to the foundation. The measured response is compared by the two different analytical approaches: linear analysis - Novak's plane strain theory with static interaction factor approach and non-linear analysis -Novak's continuum model with dynamic interaction factor approach. For non-linear analysis, allowance is made for the separation between the pile and soil in boundary zone model. Reasonable match between the measured and predicted response by non-linear analysis is found. The test data are used to establish the empirical relationship between the extent of soil separation around the pile and the maximum vibration amplitudes under coupled vibration.
机译:本文试图通过实验和分析研究来研究耦合振动条件下土-桩在非线性响应中的相互作用。本文研究了钢筋混凝土桩在垂直和水平谐波激励水平变化下的动力响应特性。单桩和组桩(2×2)用于研究。通过振荡器施加在桩帽上的水平激振力会导致基础运动耦合。可以通过两种不同的分析方法对测得的响应进行比较:线性分析-使用静态相互作用因子方法的Novak平面应变理论和非线性分析-使用动态相互作用因子方法的Novak连续体模型。对于非线性分析,在边界区域模型中考虑了桩与土之间的分离。通过非线性分析发现了测得的响应和预测的响应之间的合理匹配。测试数据用于建立桩周围土体分离程度与耦合振动条件下最大振动幅度之间的经验关系。

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