prestressed concrete;  Long-span building covers;  Force performance

There are various forms of large-span prestressed concrete building structures, and different building cover structures need to choose structural forms with different stress properties. Taking the large-span prestressed concrete building cover of the exhibition part of Zhengzhou International Convention and Exhibition Center as the research object, three structural forms and five different structural arrangements of primary and secondary beam structure, secondary beam load-bearing structure and tic-tac-toe beam structure were discussed, and they were analyzed and calculated. According to the force characteristics of each structural layout scheme, through the analysis of the amount of prestressed ribs, internal force and deformation of five different arrangement methods, the results show that the tic-tac-toe beam scheme is superior for such structures with little difference in bidirectional span. This conclusion provides a basis for the correct selection of structural layout scheme and optimization of building structure scheme.