Reliability of Pre-stressed Elliptical Paraboloidal Concrete Shells
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Bibliographic Details
| Author(s): |
Gnida Sossou
(Kwame Nkrumah University of Science and Technology, Kumasi, Ghana)
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Tomorrow’s Megastructures, Nantes, France, 19-21 September 2018 | ||||
| Published in: | IABSE Symposium Nantes 2018 | ||||
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| Page(s): | S5-95 | ||||
| Total no. of pages: | 7 | ||||
| DOI: | 10.2749/nantes.2018.s5-95 | ||||
| Abstract: |
This paper describes a numerical and experimental analysis model used to estimate (a) transient bi-directional strains due to the concrete creep and shrinkage, (b) the resulting time-dependent bi- directional stress redistribution, as well as (c) bi-directional displacement variations in the structural shell elements and (d) bi-directional pre-stressing losses in the pre-stressed high yield steel tendons. The concrete shear stresses are evaluated by the well-known principle of Juravskiy. A series of experiments with once evaluated strength parameters are planned to be used to provide encouraging support for the numerical evaluations said at points (a) - (d) in addition to (e) calibrating the parameters to enable the estimations of the time-dependent pre-stressing losses, (f) predicting the shell elements sections’ stiffness and strength by determining their long-term flexural and nonlinear creep capacity and hence, (g) devising a definition for structural reliability. |
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| Keywords: |
structural reliability megastructure elliptical paraboloidal concrete shells large span shell roofs concrete creep steel tendons concrete shrinkage pre-stressing losses pre-stressed edge beams pre-tensioned shell elements
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