COUPLED SEISMIC RESPONSE OF PIPING AND A LIQUID COLUMN. (2ND REPORT, AN EXPERIMENT AND ANALYSIS OF SEISMIC COLUMN. (2ND REPORT, AN EXPERIMENT AND ANALYSIS OF SEISMIC RESPONSES).

Liquid-filled pipelines are expected to undergo transient hydraulic effects due to pressure rise during earthquakes. The object of this study is to investigate the coupled seismic responses of piping and liquid columns, and to show the difference between 'the dead mass model' and 'the coupled model'. For this purpose, a large scale shaking table test and analysis was carried out using a straight piping model. In this report, continuing the 1st report, the experimental results and analysis of random responses are described. In the numerical simulation, the Runge-Kutta method for a pipe support system, and the characteristics method for a liquid column were used. The simulated responses had good agreement with the experiment, and the availablility of the method was confirmed. The dead mass model showed a very different response from the real response for 'hard support systems', but it was available for 'soft support systems'.