Pretensin Simulation of the Long Span Truss String Structures Supported by the Temporary Structures

摘要

During the pretension of the truss string structure (TSS), the stiffness and integrity of structure are improved since the tension of the string. Before pretension, lots of falseworks are set up in order to supply the temporary support for the upper truss. The reasonable pretension of the string commonly conforms a principle that the upper truss is just moved up from the falseworks. Therefore, the critical point of the pretension method is how to precisely simulate the mutual effects of the elastic falseworks and the truss. The pretension process of the museum roof structure of Yantai world trade center is taken as an example to do the pretension simulation analysis in this paper. The calculation model, in which the mutual effects of the elastic falseworks and the truss are considered, is created. The pretension of the TSS is stimulated. The numerical simulation data, which are valuable reference for simulating structure construction, are provided.