부산대학교 도서관

STEEL-CONCRETE CYLINDERS UNDER EXTERNALPRESSURE stiffeners, creating a host difficult welding of problems. It has been shown (especially by the tests described in this paper) that itis possible to construct large composite-walled vessels, using two mild steel skins with ordinary concrete between them, to withstand pressures equivalent to 1000 m of water depth with an adequate safety margin. external pressure, is transferred mainly to the outside skin, which quickly yields too. 11. Thereafter, further increase in circumferential load is carried by the concrete (unless the steel strain hardens) until it breaks down and crushes, usually locally becauseof small circumferential bending in the wall consequent on the enhancementof initial out-of-roundness...