Shear Stress Distribution in Bottom Plate of Anchored Cylindrical Tank under Seismic Loading
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概要
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The horizontal force which acts on the shell plate of cylindrical tank is transmitted to the tank foundation through the bottom plate during an earthquake, and the shear stress in the bottom plate is caused by the horizontal force.The shear stress distribution in the bottom plate under the seismic loading has not been clarified yet, except for the local stress distribution of the bottom annular plate adjacent to the shell plate.In order to investigate the stress distribution in the bottom plate of an anchored cylindrical tank under the seismic loading, the static tilt test of a model tank was carried out, and the shear stress distribution in the bottom plate of the model tank was analyzed by the finite element method (FEM) in consideration of the friction force between the bottom plate and the foundation.The calculation method of the shear stress, which occurs in the bottom plate especially at the location along the axis that is perpendicular to the direction of the seismic loading, was developed.The calculated shear stresses were compared with the experimental results and the analysis results by FEM.From this study, some conclusions were obtained as follows, (1) The high shear stress occurs in the bottom plate under the seismic loading, and this shear stress is distributed in the sinusoidal mode along the circumferential direction.(2) The values of the shear stress with the presented calculation method were in good agreement with those of the experimental results and those of FEM analysis.
- 一般社団法人 日本高圧力技術協会の論文