An Hand von Lichtbildern uber Versuche an Rohrelementen, welche frei liegen oder von starren bzw. von Lockermassen umgeben sind, wird auf die grundsatzliche Knickfigur von Stollenauskleidungen eingegangen. Die Versuchsergebnisse werden mit den gebrauchlichsten Bemessungstheorien verglichen und dabei die Grunde aufgezeigt, warum die Ergebnisse der verschiedenen Bemessungstheorien durch Ausendruck beanspruchter Stollenauskleidungen bis zum doppelten Wert voneinander abweichen konnen.

Über das Knickverhalten von Stollenauskleidungen in Fels- und Lockerböden

This paper adopts the variational principle to derive separately the formulas calculating the critical external pressure on smooth steel linings with the initial noncircularity in a state of limited equilibrium as well as of elastic stability. It discusses the effect of the initial noncircularity on the first type of critical external pressure and introduces the terra of the initial noncircularity into Amstutz's formula from 1969. In addition, this paper analyzes in detail the buckling damage mechanism and the buckling process of smooth steel linings under external pressure. It is demonstrated that the design should be based on the first critical external pressure when high tensile steel linings are used.

Buckling of Smooth Linings of Pressure Shafts and Tunnels

/pdf/essais-sur-l-instabilite-des-conduites-metalliques-lisses-4ye0e8n97m.pdf

ESSAIS SUR L'INSTABILITÉ DES CONDUITES MÉTALLIQUES LISSES NOYÉES DANS DU BÉTON ET SOUMISES À UNE PRESSION EXTÉRIEURE (suite et fin)

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ESSAIS SUR L'INSTABILITÉ DES CONDUITES MÉTALLIQUES LISSES NOYÉES DANS DU BÉTON ET SOUMISES À UNE PRESSION EXTÉRIEURE (suite et fin)