Research on Construction Techniques and Safety Control for Long-Span Structures

Currently, large-span spatial structures are trending toward extreme and complex designs, yet existing construction control methods predominantly rely on static design theories based on final states, struggling to address nonlinear time-varying characteristics during construction. To address the challenges of path dependence in mechanical evolution, large geometric deformations, and discrepancies between virtual and physical mapping, this paper proposes an integrated control system that combines full-process simulation with digital perception. This paper first analyses the cumulative internal force effects triggered by construction path dependency and the lag in perceiving multi-source information. Building upon this, it proposes a full-condition inverse simulation and pre-deformation control technique based on the finite element element birth and death method to address nonlinear deformation issues. A multidimensional sensor network, coupled with a digital twin real-time model correction system, is established to resolve the disjunction between virtual and physical mapping.