爆破拆除中框剪结构失稳运动分析OA

To address the issues of unclear dynamic mechanical laws and difficulties in ensuring safety and controlling peripheral stability during the blasting demolition of frame-shear wall structures,this study takes the folding blasting demolition project of the Ruzhou Unicom Building as an example and employs numeri-cal simulation to construct a refined mechanical model,systematically analyzing the dynamic responses and failure mechanisms of key components in the frame-shear wall structure.The results show that the numerical simulation results are highly consistent with the actual collapse process in terms of collapse morphology and timing,verifying the reliability of the model and parameters.During the progressive damage process of the structure,the axial force in the columns exhibits a phased redistribution pattern,which intensifies with cu-mulative damage.When the lower cut is formed,the axial force increases sharply to 962 kN,approximately 14.5%higher than the peak value in the upper section.The shear force and bending moment of the columns exhibit significant spatial asymmetry and height gradient effects.The peak bending moment of the lower col-umns is about ten times that of the upper columns,reflecting the uneven vertical force distribution in the structure.The findings provide a reference for numerical simulation modeling,safety assessment and refined design of similar frame-shear wall structures in blasting demolition.