Analysis of structure division erection for streamer grid of Hangzhou International Expo Center

By comparing several erection methods of streamer grid structure of Hangzhou International Expo Center, the structure division erection scheme was determined. Hoisting state of block element was simulated in static analysis method. The analysis model for hoisted structure division unit, which is based on the principle of the coincidence between the center of gravity and the intersection of hoisting points, was established to obtain structure response under the condition of different hoisting points or cable length. Furthermore, reasonable hoisting scheme was obtained based on stress ratio, vertical displacement of node, cable length and cable force. The results of analysis indicate that both force and definition methods of calculating center of gravity position are viable and which one to be used depends on the construction situation. The hoisting point position should be arranged evenly around the center of gravity. The cable length can be determined by construction condition.