| Arched Corrugated Metal Roof (ACMR) is a new type of metal arched thin-shell structure. It was introduced into China at the end of 1980s. Because it has a lot of virtues, this kind of structure has been found wide application and possesses strong vitality and a bright future. But by now, the study of this structure is still not mature and perfect. There has no corresponding feasible design standard all over the world, which hinders the dissemination of this structure in our country. ACMR is a kind of cold-formed thin-walled steel structure. Stability of these structures is a critical factor on their load-carrying capacity. Furthermore, cold-formed thin-walled steel structure is sensitive to initial defectiveness and boundary condition, so all these issues need to be studied further.As we know, support at the both straight edge of ACMR is a elastic support between the hinged support and fixed support, and its stiffness is variational. So the relation between support stiffness and load-carrying capability of ACMR is worth to be studied. Meanwhile, arched roof is generally set on beam at the top of pillar. Since column adaptor may has displacement (specially horizontal displacement ), load-carrying capability of the structure will step down, and bending rigidity of the column also has emphatic influence on it.W666 Arched Corrugated Metal Roof is taken as the object of study in this paper. On the basis of simplified calculation model presented by Doctor WangXiaoPing, some finite element models are set up. By finite element model program SAP93, an analysis of static models of 18m-span and 30m-span W666 ACMR in different supporting conditions is made.Also a study on the relation between definite support displacement, which reflect variational stiffness of substructure represented by steel column or reinforced concrete column, and load-carrying capacity mechanical performance is made too.
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