| ABSTRACT:The cable-supported truss structure is a new high efficient structural system. Influencing factors of cable-supported truss structural mechanics performance includes cable geometric arrangement, cable mechanical properties and sequence of tensioning cables. This thesis firstly analyzed the effect of different factors to the cable-supported truss structural mechanics performance, on the basis of this analysis, put forward optimal plans of different factors. Secondly, the spatial structure system which constituted by single cable-supported truss structure was taken as the subject by simulating the whole process of prestressing construction. On the basis of this analysis results, summarized the effect of sequence of tensioning cables to the structure and suggested reasonable analysis method.The main research contents in this field include:1) The cable-supported truss structural member forces and vertical displacement differences were studied in the different layouts of cables. Optimal cable layout was proposed on the basis of analysis results. Layout of cables includes position of the cable-supported joint and cable steering angle. In the analysis, the optimal position of the cable-supported joint was determined and cable steering angle was determined secondly.2) The cable-supported truss structural member forces and vertical displacement differences were studied in the different cable mechanical properties. Cable mechanical properties include prestressing force level and cable section. On the basis of analysis results, summarized optimal prestressing force level and cable section.3) Cable-supported truss structure was taken as the subject by simulating the whole process of prestressing construction. Structural member forces and vertical displacement were calculated with two methods. By contrasting the structural member forces and vertical displacement, suggested appropriate simulation method, ensured structural safety in the whole process of prestressing construction.
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