基于流固耦合理论的立式储液罐抗震数值分析

A seismic analysis of elevated liquid storage tank based on fluid solid coupling theory

建立基于流固耦合理论的立式储液罐非线性数值模型,并在地震荷载作用下对其进行罐底提离机理探讨以及罐壁"象足"和"钻石"变形仿真分析。结果表明,考虑罐壁与液体、罐底与基础接触的模型是有效的,由于液体晃动产生的倾覆力矩作用使罐壁受拉侧罐底边缘倾向于脱离地基,形成罐底提离,从而导致罐壁"象足"变形的屈曲破坏。

The nonlinear numerical model for elevated liquid storage tank is built based on fluid solid coupling theory and antiseismic research is done with fluid sloshing and tank bottom uplifting involved.The elephant foot bulging and diamond deformation are simulated.The numerical result shows that the model with contact between the tank wall and the fluid as well as that between the tank bottom and the soil foundation considered is valid.And in the lifting moment,fluid sloshing makes it likely that the tank wall divorces from the foundation and consequently the elephant foot bulging deformation is produced.