Study on Refined Analysis Method of Construction Process for Spatial Structures Based on Slow Time-Varying Dynamics

SHI Kairong; CHEN Runyang; JIANG Zhengrong

doi:10.13512/j.hndz.2024.02.14

Abstract：Aiming at the construction process simulation of the spatial structures,a refined analysis method of the dynamic construction process based on slow time-varying dynamics was proposed according to the basic principle of time-varying mechanics.This new method realized dynamic coupling among the geometric,physical,and boundary factors of the time-varying structure by setting the analysis time consistent with the actual dynamic construction process and introducing the inertia force and damping force.Therefore,this method achieved the refined analysis of the whole construction process in practice.On this basis,the solution idea and implementation process of this method were given.The construction process of the complex long-span oblique corridor structure was analyzed,and the measured construction data was compared.The results show that the calculated values of this method are consistent with those of the traditional static construction process analysis method,which are generally closer to the engineering practice.Therefore,it can be used for the construction process analysis and safety assessment of spatial structures.Compared with the traditional static construction process analysis methods,this method can more accurately reflect the dynamic cumulative effect of the structural response in the actual construction process and obtain the stress and deformation of the structure at any time.Moreover,it can also be applied to the analysis of complex construction processes with strong nonlinearity,such as large deformation,large displacement,and mechanism displacement,etc.,avoiding the difficulty of convergence of nonlinear solution in traditional static construction process analysis methods.