Influence of End-Closure Stiffness on Behavior of Concrete Cylindrical Hulls Subjected to Hydrostatic Loading.

摘要

Twelve model concrete cylindrical hulls were subjected to hydrostatic loading to determine the influence of end-closure stiffness on implosion pressure and strain behavior of the cylinders. Results showed that variation of end-closure stiffness did not reduce the implosion pressure below that of a cylinder with a free end condition or below the implosion pressure predicted by elastic thick-wall theory. To vary the closure stiffness,concrete hemisphere and steel plate end closures were used to simulate free,pinned,beveled,and fixed end conditions. Strain variations along the length of the cylinders indicated that the influence of the closure was limited to a distance of one diameter from the closure. Recommendations are presented to aid in the design of concrete cylindrical hulls. (Author)