Static structures (e.g. – buildings) – Tensioned or flexed sheet facing
Patent
1980-08-28
1983-06-28
Friedman, Carl D.
Static structures (e.g., buildings)
Tensioned or flexed sheet facing
52248, E04C 310
Patent
active
043898254
ABSTRACT:
A prestressed concrete pressure vessel capable of containing extremely high pressures in an internal cavity, 10,000 psi and higher, is constructed in such a way as to enable the application of extremely high circumferential prestressing force at the outer cylindrical surface. The extreme circumferential post-tensioning force, much greater than previously known in prestressed concrete pressure vessels, provides for containment of extreme pressure in the internal cavity, with a relatively thin-wall vessel. In order to accommodate the high circumferential post-tensioning without structural damage at the interior of the vessel, the vessel includes vertical stress relieving slots extending radially outwardly from the internal cavity surface, effective to lower peak tangential compressive stress at the cavity surface and to relocate peak stress inside the vessel wall, where the concrete is confined.
REFERENCES:
patent: 3293139 (1966-12-01), Bellier
patent: 3389516 (1968-06-01), Ziegler
patent: 4195457 (1980-04-01), Kissling et al.
patent: 4265066 (1981-05-01), Lin et al.
Friedman Carl D.
T. Y. Lin International
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