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在进行土-结构离心机振动台模型试验过程中,针对数据信息的采集量测以及传感器位置的优选进行了研究。采用地下结构静力弹塑性分析方法对土-结构相互作用系统进行了地震反应分析,采用等代静力地震荷载,即沿土层深度分布的水平惯性加速度替代动力地震动输入。计算结果表明,结构各构件端部所受到的土压力与内力均较大,对这些部位应进行重点观测;同时在满足基本信息采集要求的情况下,对可供采用的信息采集通道进行了优化分配,由此确定了该次试验的观测断面以及传感器的具体量测部位与数目。
During the model test of shaking table of soil-structure centrifuge, the collection and measurement of data information and the optimization of sensor position were studied. The seismic response analysis of soil-structure interaction system is carried out by static elasto-plastic analysis method of underground structure. Equivalent static seismic load, that is, horizontal inertial acceleration along the depth of soil layer, is substituted for dynamic ground motion input. The calculation results show that the earth pressures and internal forces at the end of each component of the structure are large, and the focus should be observed on these parts. At the same time, the available information acquisition channels are optimized under the condition of meeting the basic information acquisition requirements Distribution, which determine the test section of the test and the specific measurement of the sensor site and the number.