Abstract

Demand for “thin sections” is increasing due to economy. They are widely used in the construction industry because of their light weight and economy, particularly for longspan floors in industrial and public buildings and for storage structures for liquids and bulk materials, such as tanks, hoppers, silos etc. In case of thick walled members there is classical theory which explains the behavior of structural elements. But it is noted that classical theory does not hold good for thin walled members as the nature and magnitude of the stresses of these members differ from that of the thick walled members. Therefore a study is made to understand the behavior of the member when it is assumed as thin walled and its stress pattern is studied.. Here we have attempted to calculate longitudinal stresses caused due to bimoment only for Symmetrical Z-section and compare the percentage increase in the stresses in thin walled when compared to that of the thick walled for various height and thickness of flange and web.