BIM parametric modelling analysis of instability of concrete building components under continuous vibration

To address the challenges in accurately modelling and assessing the stability of concrete building components under continuous vibration, this study presents a novel BIM parametric modelling and analysis method. An instability analysis framework incorporating six correction parameters is established through precise quantification of four key parameters: aspect ratio, moment of inertia, elastic modulus, and constraint conditions. Simultaneously, a critical load calculation model integrating geometric characteristics with material nonlinearity is developed. A dual-parameter instability criterion is proposed, which couples dynamic response with cumulative energy dissipation, enabling a more comprehensive evaluation of component behaviour. Furthermore, a probabilistic calculation model based on five-level instability criteria is established to quantify failure risk. The performance of the proposed method is validated through experimental studies. Results indicate that the method achieves a stable modelling matching degree consistently above 95%, while the accuracy of instability analysis reaches over 96.5%, demonstrating its effectiveness and reliability for engineering applications.