Scheme Optimization and Monitoring of Temporary Support Unloading of New Special-shaped Curved Steel-wood Composite Structure
The roof structure of the Wenzhou Future Community Experience Hall features a unique combination of steel and wood with a specially-shaped curved surface.The facade incorporates slender steel columns hinged at both ends,serving as supports for the glass curtain wall.This design optimally leverages the advantages of both wood and steel structures,minimizing steel usage.However,due to the large span and intricate shape,the disassembly of temporary supports necessitates precise synchronization and stability.Unloading requires meticulous calculation,analysis,and construction monitoring based on actual arch coordinates to ensure structural safety.Using MIDAS/GEN,this study conducts numerical simulations for the unloading construction process of the composite structure.The existing preliminary scheme defines internal forces and joint displacements in each construction step,forming the basis for proposing an optimized step-by-step and classified unloading scheme.Concurrently,the displacement response during the unloading construction process is dynamically monitored.The calculation results demonstrate that unloading 52 jacks step by step effectively doubles the displacement of support points and member stresses.The gradual reduction of load,employing a staged unloading strategy,successfully achieves accurate structural control,preventing excessive internal deformation and stress concentration,and ensuring overall stability.The error between the actual and theoretical values of monitoring points remains within a reasonable range,confirming the accuracy of the simulation analysis and providing reliable support for engineering practice.
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