Overall Stability of the Long Span Steel Roof Structure of Hangzhou International Conference Center

Abstract

Large span structures are widely used in modern buildings because of their novel forms or shapes, light self-weight and lower construction cost. The buckling behavior of the large span structures under loads are much complex and hard to understand. The non-linear stability analysis and the incremental-interation tracing methods are necessary for design complementory during design. The geometry imperfection influences on structure stability are also needed to be considered. There are no special analysis technics and judging methods for overall stability of the large span structures in current national design codes of our country. It is necessary to carry on non-linear overall stability analysis for every specific structure to obtain the overall stability behavior of structures during design.

According to the design demand, the finite element model of the steel roof structure of Hangzhou international conferernce center (shown as in Fig.l) are set up in the paper. The large displacement elastic and elasto-plastic overall stability analysis of the perfect and imperfect steel roof structure are conducted. The critical loads, member stresses and maximum displacements under different load cases are obtained. The reliable numerical data are provided to the design. The valuable ideas about the overall stability behavior of the large span structure are concluded. It is a useful reference for design of similar structures.