AN EXPERIMENTAL STUDY OF THE BEHAVIOUR OF A HYPERBOLIC PARABOLIC CABLE ROOF

Abstract

This thesis presents the study of the labo-ratory model of a Hyperbolic Paraboloid roof network of the square plan area 3.6m x 3.6m. The model consisted of straight edge beams comprising of mild steel box sections. The beams were designed to allow negligible deflections only under the maximum permissible loading. The cables , are simulated by ,high tensile steel .wires of 4mm. -diameter. These wires which are equally spaced run diagonally across the plan area and are anchored into the edge beams. They were prestressed to about one third cf their yield value. The model was then tested under the different conditions of loading both concentrated and uniform 2y distributed. Deflections were measured by using dial gages as well as the principle of photogrammetry. Forces were measured by using tension links. The theoretical results have been obtained by using generalised computer programmes on digital computer IBM 7044. The,measured values show good agreement with the calculated values.