OPTIMIZATION OF STRUCTURE AND ANALYSIS OF INITIAL PRESTRESS OF OVAL GEIGER CABLE DOMES

Geiger cable domes have been successfully applied in stadiums with circular plane both at home and abroad，but hardly used in stadiums with oval plane． In this paper，combined with the concept of the force density method and the integral possible prestress，and based on the pre-design of the cable dome in Tianjin University of Technology，the calculation methed for initial prestress of oval Geiger cable domes was explored，through the comparison of the initial prestress of structures with three different kinds of arranging forms of cables and bars，it was concluded that Geiger cable domes with unequal height of the boundary and hoop cables changing with the slope of the boundry were more suitable for oval roofs through some improving measures．