A theoretical and experimental investigation of prestressed cylindrical shell roofs (1966)
Type of ContentTheses / Dissertations
Thesis DisciplineCivil Engineering
Degree NameDoctor of Philosophy
PublisherUniversity of Canterbury
This thesis deals with the experimental and theoretical analysis of cylindrical shells that are prestressed within the curved surface.
An existing solution to the D.K.J. equation is presented and extended so that cylindrical shells can be analysed with line-loads applied along pairs of generators. A method of replacing the loads on a cylindrical shell from prestressing cables within the curved surface by actions along a finite number of generators is given. Computer programs have been written to carry out this process and analyse prestressed cylindrical shells.
The construction and testing of an aluminium alloy model of a cylindrical shell from which strain and deflection readings were obtained from eight different symmetrical prestressing cable layouts is described. Particular emphasis was placed on the obtaining of accurate experimental readings.
Comparisons between theory and experiment showed that the behaviour of the model shell was close to that described by the D.K.J. equation and that a Levy type solution gave satisfactory stresses and deflections over most of the shell surface.
Of particular interest is the variation of transverse moments with different prestressing cable lay-outs and different shell spans.
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Croll, J. G. A. (University of Canterbury. Civil Engineering, 1967)This investigation is concerned with the application of finite difference methods to the solution of thin elastic shallow shells. In particular, the ruled surface hyperbolic paraboloid is systematically studied to determine ...
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