A Comparative Analysis of Folded Plates Using Beam Method, Modified Simpson's Method and STAAD.pro

Tejas D Doshi, Asst Professor & Ashutosh D Sadalge, M-Tech. student Dept. of Civil Engg., K. L. E. S's College of Engg & Tech., Belgaum.

Folded plate structures are finding increasing applications in the present day building practice for covering large column free areas. The economy in covering large column free areas, and consumption of materials, aesthetic views and ease of construction are all in favour of such structures. The behavior of such structures is divided into a transverse slab action and longitudinal plate action. The structural behavior of folded plate is generally 3-dimensional.

The very purpose of this study is to study the behavior of the roofing element in the form of "FOLDED PLATES" to analyze the folded plate by different methods and to compare the longitudinal stresses and transverse moments developed when subjected to transverse loads. Plates in the form of symmetrical Trough shape and V shape as regards to the span, width and depth of the structures is taken into consideration for the comparative analysis. The various parameters (dimensions) are assumed as per "guidelines for selection of dimensions."

The structure is analyzed by Beam method and Modified Simpsons's method (using design tables) manually. Also the analysis of the folded plate structures has been modeled and analyzed using the software STAAD.Pro. The analysis is carried out for different spans of folded plate structures. The thickness and angle of inclination of the plates are taken as 0.1m and 450 respectively. Longitudinal stresses, Transverse moments and stress resultants obtained after analysis by the above methods and software are compared.

The comparison shows that, STAAD.Pro software can be used for analysis rather then the two approximate methods.

NBMCW July 2014

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