Numerical Simulation and Monitoring of Unloading the Temporary Supports of High-rise Structures: a Case of Beijiang Pearl Tower

The lifting construction process of high-rise structure is very difficult, and the unloading and demolition of lifting equipment and temporary support pose a greater challenge to the construction safety of high-rise structure. With the Beijiang Pearl Tower Project as the background, the unloading process of the revolving restaurant after hoisting was studied by combining Abaqus life and death element technology with unloading process monitoring. Five unloading schemes were formulated to analyze and compare the influence of different unloading sequence on the internal force of the structure. The finite element simulation results are basically consistent with the monitoring data, indicating that the technology is effective and feasible, and the combination of the two can effectively ensure the safety of the construction unloading process. The analysis results show that: for the overall lifting construction of multi-layer frame convex structure of similar high-rise structure, when unloading the temporary support, it is appropriate to first remove the secondary components outside the floor where the lifting steel strand lifting point is located, then gradually remove the steel strand load, and remove the steel strand and equipment, and finally remove the main support components near the upper and lower lifting points of steel strand.