双江口心墙堆石坝振动台模型试验研究

Shaking table model tests of Shuangjiangkou core rock-fill dam

通过振动台模型试验,得到了双江口心墙堆石坝的自振频率、阻尼比和振型等动力特性参数,研究了坝体地震加速度反应和残余变形等分布规律,这些成果可供大坝抗震设计参考使用,对其他工程亦有一定的参考价值,也是验证和改进地震动力反应方法和计算程序的基本资料。本文详细介绍振动台模型试验概况,包括模型设计、模型制作、加速度传感器埋设、表面位移测点布置和试验方案等情况。

The dynamic behavior and seismic response of Shuangjiangkou core rock-fill dam were studied by shaking table model tests, and various dynamic parameters, natural frequency, damping ratio, vibration mode of model dam, etc. obtained. The space distributions of seismic acceleration and residual deformation were studied. Thess results are useful for the seismic design of dam, and the experimental data are valuable for the verification and improvement of the numerical methods and simulation models of seismic dynamic response. This paper gives a general introduction of the tests, including model design and construction, testing schemes as well as arrangement of acceleration sensors and surface-displacement sampling points.