【摘要】 高填石路堤在工后运营过程中,长期受到动力荷载的作用。基于相似比理论建立高填石路堤动力响应的室内试验模型,以简谐振动荷载和冲击荷载模拟高填石路堤实际受到的复杂动力荷载,采用动土压力盒和加速度计拾取模型路堤在振动器作用下的响应波形。利用 Drucker-Prager 弹塑性本构模型进行模型路堤的动力响应有限元分析。分析结果表明,有限元分析值与实测值比较接近,即使在较大的动力荷载作用下,高填石路堤内部产生的塑性区也只是暂时的和局部的,仍可维持其整体稳定,且表现出应变硬化的动力特性。更多还原

【Abstract】 High-enrockment embankment chronically received the effect of dynamical load in the run course after the construction. Based on the resemble scale theory,a dynamical response indoor model of high-enrockment embankment are used to simulate the syntony load and impact load is established.The factual complicated dynamical load of high-enrockment embankment received. Using dynamic earth-manometer and accelerometer to pick up response wave;Using Drucker-Prager elastoplastic model to analyze dynamical response finite element on high-enrockment embankment.It was shown that the finite element analytical result was in good agreement with experimental data;even under the bigger dynamical load,plastic area in high-eurockment embankment was also just temporary and partial;it still could maintain whole stability,and expressed a dynamical strain hardening characteristic.更多还原