Six Freedom Shaking Table Tests of a Rectangular Tank (Flexible Roof Sloshing Impact and Yawing Sloshing)

摘要

Earthquake responses of rectangular water tanks should be investigated to keep water during disaster. Roof damage of rectangular tanks was reported in Hanshin Great Earthquake. In order to study sloshing impact effects on elastic roof plates, a sloshing test of using six freedom shaking table was conducted. In the test, the sloshing impact were measured in three roof conditions. The roof plate of 3mm thickness was used in two setting conditions. One was clumped with bolts, the other was clumped with bolts and rubber washers. The roof plate of 13mm thickness was clumped with bolts. Large roof deformation was measured in tests of 3mm thickness roof. In the tests of 13mm thickness roof, sloshing impact was measured bigger in comparison with 3mm thickness roof. The results were discussed in theoretical analysis. Then, torsional sloshing motions to yawing excitation were observed in the shaking table test. This motion was analyzed, and the participation factor for a linear sloshing equation of yawing excitation was given.