Study On Construction Monitoring And Damage Prognosis Of Large Scale Bridge Based On Short Assembled Technology

Short-line precast cantilever construction technology is a new type of bridge construction technology,this paper analyzes the theory and calculation method of short-line prefabricated cantilever construction technology : the control theory of "six point method" and its operation method;linear calculation method;coordinate conversion method.Through study of the theory,calculation methods,improve,innovation,this paper formed a complete set of scientific short-line precast bridge construction technology.Through apply this construction technology to yueqing bay bridge construction monitoring work,the construction of ideal results have been achieved.Consistent multi-scale finite element modeling method is applied to the bridge for the study of damage prognosis.Materials and structural damage prognosis research is a process across multiple scales research,and research on the multi-scale finite element modeling method for consistent damage process has its unique superiority.Articles with multi-scale finite element model and the modeling method to do the further research,is deduced based on the displacement coordinate method and node power equal to the method of multipoint constraint equations.The paper discusses the modeling method of multi-scale finite element model in-depth research.The compatible displacement method of constraint equation and Node equal work method is deduced.Through an example analysis,verified the correctness of multipoint constraint equations and the scientificity of multi-scale finite element modeling method.Large civil engineering structure damage research work has been the hot topics in the study of domestic and foreign experts.The article studied the plastic constitutive relation of concrete material damage.Deduced the calculation method of the concrete material damage factor.The consistent multi-scale damage simulation analysis was carried out on the bridge.Calculated the damage development process of bridge under the action of foundation uneven settlement and seismic action.