The main aim of the present work is to investigate the dynamic analysis of circular cable suspended roofs which are the most common forms of suspended roofs using the frequency domain method. Although frequency domain analysis is used basically for linear systems, it may be used to analyze cable suspended roofs for which, wind is considered as the fundamental dynamic factor affecting in these structures. This is due to the fact that the fluctuating wind speed, except for sites in mountainous areas, may be neglected comparing with the mean wind speed.
Many circular cable roofs have been analyzed using a computer program constructed by the second author based upon the frequency domain analysis. The results WTC used in making non-dimensional graphs. These graphs were used to used to investigate the factors that affect the natural frequencies of circular cable suspended roofs.