Abstract
The main structure of a performing arts center is in a bowl shape, formed by cantilever frames. When constructing, a temporary steel support system is designed to withstand the construction loads. The structural support system which is 30 meters high, is divided into five layers. In order to ensure the overall stability of the steel frame, scissors are set every three cross along the ring to the medial and lateral column. Since the loads are very big, bearing capacity and stability analysis of the support system are carried out. According to the site construction schedule, the loading processing is divided into 4 working conditions. Under each load condition, static and linear buckling analysis is conducted. For economic consideration, member sizes are optimized by pursuing the similar stress ratio based on the results of static and linear buckling. Structural software SAP2000 is employed as the analysis software. The results showed that: the working conditions 4 is the most dangerous working condition. The main stresses of beams and columns on the axis position are larger than other positions. The bucking analysis indicates that working conditions 1 to 4 the buckling factors of first-order buckling modes are greater than 1.0 under working conditions 1 to 4, which explaining that under the current loads, the steel support system is reached the required overall stability.
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