BEHAVIOR OF SPHERICAL CONCRETE HULLS UNDER HYDROSTATIC LOADING. PART II. EFFECT OF PENETRATIONS.

摘要

The objective of the study was (1) to show that concrete hulls with window and hatch penetrations for ocean bottom habitats can be built,and (2) to determine if the collapse pressure of such hulls is degraded by the incorporation of properly designed penetrations. All of the experimental work was performed on six concrete spheres (16-inch outside diameter and 14-inch inside diameter) cast from concrete with a uniaxial compressive strength of 10,000psi. The concrete sphere models failed under hydrostatic pressures ranging from 2,675psi to 3,400psi,depending on the type of penetration insert. It was found that the collapse pressure of a concrete hull equipped with properly designed operational windows and hatches was the same as that of a similar concrete hull without penetrations. (Author)