Verification of the method of estimating bending moments in soil-shell structures on the basis of shell deformation
Journal Title: Roads and Bridges - Drogi i Mosty - Year 2016, Vol 15, Issue 3
Abstract
The paper concerns soil-shell bridge structures of arch cross-section made from corrugated plates. During backfilling the shell crown is deflected upwards and the sides move inwards at the shoulder (haunch) level. The measured displacements are used to represent the arch deformation. With large displacements that typically occur during backfilling it is possible to measure them with surveying instruments. This enables monitoring the changes in the shell deformations on site as the work proceeds. This study analyses the accuracy of the method to estimate the bending moments induced in the structure - the main factor influencing the values of normal stresses in the shell – on the basis of the deformation of curvature at the crown, determined by measuring the displacements. The measurements and calculations carried out for an existing structure were used for comparative analysis. The structure identified for this purpose is an arch shell made of single, deep-corrugated metal plate (Super Cor). The experimental study included measurement of unit strain of the shell to determine the bending moments used for independent verification of the computed values.
Authors and Affiliations
Leszek Korusiewicz
Keywords
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- EP ID EP82186
- DOI 10.7409/rabdim.016.014
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