Collapse Analysis of a Large Span Roof Steel Structure

摘要

This paper presents the collapse analysis of a large span roof steel structure occurred in Brazil, South America, in 1994. The structure was a space truss with height of 3 m, span of 110 m and length of 128 m, supported by reinforced concrete columns. Support appliances that allow rotations along roof structure span direction only did the connections of the space truss to the concrete columns. The steel members were made of tubular sections with diameters varying from 76 mm to 324 mm. The space truss nodes were composed of flat steel plates welded to each other and spatially distributed in suitable directions. In order to obtain the failure reasons, it has been assessed the design and the structural conception, the detailing, the manufacture and assembly of the structure, the structural stability and the need of nonlinear and dynamic analysis. A set of tests in selected members of the steel structure has been also made.