多点非一致激励下埋地管道多台阵振动台试验方案研究

Research on shaking table test scheme of buried pipeline under multi-point non-uniform seismic excitations

针对多点非一致激励下埋地管道的破坏特性,首次设计并开展了多点非一致激励下埋地管道的三台阵振动台试验。首先根据试验条件及试验目的,通过专项研究确定了整个模型体系的相似比,设计了适用于长线型地下结构多台阵振动台试验的悬挂式连续体模型箱,确定了传感器的布置位置;其次对模型材料的选取、地震动输入及试验加载方案进行分析设计。最后,利用试验数据分析了模型箱的动力特性及边界效应,结果表明,对多点非一致激励下埋地管道振动台模型试验的设计方案是合理的。该研究为顺利开展多点非一致激励下埋地管道振动台试验奠定了基础,对同类试验也有一定的参考价值。

Based on the failure characteristics of buried pipelines under multi-point non-uniform seismic excitation,the three-array shaking table test of underground pipelines under non-uniform excitation was developed and carried out for the first time.Firstly,according to the experimental conditions and purpose,the similarity ratio of the model system was determined,the suspensions continuum model box for the multi-array shaking test of long linear structure were designed and the location of the sensor were determined by special research.Secondly,the design of the model material selection,earthquake motion input and test loading system were analyzed.Finally,the dynamic characteristics and boundary effects of the continuum model box were analyzed.The experimental results show that the scheme design of the shaking table model test of the buried pipeline under the non-uniform excitation is reasonable.The research has laid a foundation for the development of the shaking table test of the buried pipeline under the non-uniform excitation and also have some reference value for similar experiments in the future.