| When subjected to external excitation, the internal reinforced concrete rectangular liquid storage structures of the liquid can be divided into two types according to the sloshing amplitude, namely the small amplitude sloshing and sloshing. Analysis of dynamic response of liquid respectively and the structure of these two cases. When the liquid micro amplitude sloshing, parsing can be reinforced concrete rectangular liquid storage structures of liquid-solid coupling hydraulic pressure solution. This equation shows that, in the external excitation frequency structure subjected to liquid vibration odd order frequency, liquid storage structure resonance occurs, dynamic response will tend to infinity, so that the whole structure is destroyed. If such responses occur in reality, will give the seismic design of reinforced concrete liquid storage structure brings many problems, such as the selection of seismic isolation design isolation period will become a big problem. When the liquid sloshing, can also be obtained by the numerical solution obtained liquid storage structures with fluid solid coupling dynamic response, if the same micro amplitude resonance sloshing similar response, will also have a lot of trouble to the actual design. This paper through the finite element analysis software ADINA, analysis of the solid dynamic coupling resonance response stream-rubber reinforced concrete rectangular liquid storage structures, and the numerical analysis results were compared with the theoretical value. The results show that:no matter what the vibration amplitude of liquid, rubber bearings can be high frequency vibration component filter liquid storage structure effectively by the external excitation, will not cause the phenomenon of high frequency resonance theory, but does not appear because of high frequency resonance caused structural damage. However, when the first order the excitation frequency is close to the natural frequency of the liquid, will appear obvious resonance structure dynamic response. So in the choice of isolation period should be of the first order frequency. At the same time, the fluid solid coupling dynamic analysis of liquid sloshing, obtained a series of nonlinear phenomenon of liquid sloshing forced occurs when, and through the analysis of the velocity vector of the liquid sloshing, explanation of these phenomena. |
