Parametric analysis of cable net roofs suspended from arches with block and tackle suspension system

Abstract

This paper deals with the parametric analysis of special arch-supported cable net structures. Based on an invention of Kolozsváry [5], the cable net is suspended from the arches with block and tackle suspension system. The aim of this special suspension system is to minimize the bending moments in the supporting arches by converting the random meteorological roof loads into nearly uniform, symmetric arch loads, based on the wellknown principle of block and tackle. Cable net structures supported by a single truss arch are analyzed by the help of the dynamic relaxation method. Structures with the same topology but different free spans are analyzed. The internal forces of the supporting arch due to different external loads are calculated. The effect of the friction between the pulley and its shaft on the behavior of the structures and on the efficiency of the block and tackle suspension system is presented.