Development of estimation method for tank foundation stability due to soil liquefaction and sloshing of tank content.

通过室内单元试验、离心机试验和有效应力分析，估算了储罐地基的液化沉降量。储罐地基的沉降与液化层厚度、最大加速度和地震持续时间有关。储罐基础沉降量的大小还与地基下土体的应力状态有关，特别是侧压力系数K的增大。与主震运动相比，沉降在一定程度上是由晃动引起的。

Settlement of tank foundation due to liquefaction is estimated by laboratory element test, centrifuge experiment and effective stress analysis. Settlement of the tank foundation is related with thickness of liquefied layer, maximum acceleration and duration of the earthquake motion. The magnitude of tank foundation settlement is also related with stress condition of soil below the foundation, especially increase of the coefficient of lateral pressure (K). Settlement is caused to some extent by sloshing compared with main earthquake motion.