EXPERIMENTAL RESEARCH BASED ON THE BEHAVIOUR OF PRESTRESSED TANKS FOR STORING LOW TEMPERATURE LIQUIDS

A 1/15 to size scale prototype of a PC dual shell tank for Low temperature liquid storage was fabricate. LN2 was used as a substitute liquid for LNG in conducting trial experiments dealing with cooling, liquid storage failure after the insulation of material and other such similar case types. In cooling it was demonstrated that the temperature difference was almost doubled at the corner sections. In addition the prestressing effect due to the differential in liner expansion factors, between the reinforced steel bar and the concrete caused a tensile stress of about 1600kgf/cm2 in the reinforcing steel bar.