이중 패널 벽체구조 무도류벽 원형 물탱크의 보강 및 구조 상세에 따른 거동특성 분석

The purpose of this study is to analyze behavior characteristics according to structural details based on FEM analysis for optimal design of a circular water tank with double panel wall. Design seismic load and distribution of hydrodynamic pressure from design codes are investigated in order to determine a proper application to the seismic design of the circular water tank. Based on the full-scale FEM analysis using shell elements, the influence of X-bracing and L-angle stiffener are investigated. From the numerical analysis, it is confirmed that using the X-bracing at the upper wall and the L-angle stiffener at the outer lower wall is more efficient to reinforce the tank. In addition, for the same capacity, the change in the behavior of the wall according to the spacing between interior and exterior walls is negligible. The inner wall, which hydrostatic pressure is balanced inside and outside, is exposed to buckling due to the hydrodynamic pressure in compression direction, and reinforcement details using the L-angle stiffener are proposed.