Experimental Research on Structural Performance of Joints Between Tank Wall and Ring Beam of LNG Concrete Storage Tank

In order to research the stress and seismic performance of joints between the tank wall and ring beam of large-scale liquefied natural gas (LNG) concrete full-capacity storage tanks,a 160 000 m³LNG concretefull-capacity storage tank was used as a prototype to conduct model test.The bearing capacity, failure mode, stiffness and energy dissipation capacity were studied by quasi-static test.The results showed that the joint between the tank wall and ring beam of the 160 000 m³LNG concrete full-capacity storage tank was not damaged when the tank wall was damaged, which conformed to the design principle of "strong joint" for large-scale concrete structures. However,the energy dissipation capacity of the structure was poor, the maximum energy dissipation coefficient before failure was 0.685, the residual secant stiffness was 0.878 kN/mm, the stiffness degradation coefficient was 0.17, and the residual stiffness was small.