Application Research Of Improved Gray-Markov Theory In Construction Control Of Cable-Stayed Bridge

With the rapid development of modern society,building materials,construction techniques,bridge structures,etc.in bridge construction have a large room for improvement.Therefore,the construction control theory of the long-span concrete cable-stayed bridge is also applied accordingly.Under such a development premise,the construction control theory of the long-span concrete cable-stayed bridge is considered from two aspects of parameter identification and error prediction.This paper is the first to quote the grey-Markov prediction model,and is committed to improving the control accuracy of the long-span cable-stayed bridge in the formation of the line,cable force,etc.,to meet the construction requirements,and to ensure the stability of the long-span concrete cable-stayed bridge during the construction process.And security.Therefore,the main contents of this article are as follows:(1)According to the purpose and method of construction control of modern long-span cable-stayed bridges,this paper collates and statistics the current commonly used theory of cable-stayed bridge construction monitoring,obtains the structural disturbance response value by changing the parameters,and divides the sensitivity of affecting parameters.The BP neural network is used to identify the sensitive parameters in the construction process of the structure,and the weight analysis of the parameters is implemented to study and analyze the influence degree of the parameter deviation during the pouring of the main beam.(2)The construction control theory of long-span cable-stayed bridges mainly adopts adaptive control.The main steps of cable-stayed bridge construction control are error analysis-parameter identification-system behavior prediction-system feedback.The commonly used prediction research mainly depends on least squares method,grey system theory,Kalman filter and BP neural network.In this paper,in order to improve the accuracy of predictive analysis of the construction control system of cable-stayed bridges,on the basis of traditional predictive research theory,the grey-Markov theory is used for the first time.Prediction,and adopt a certain improvement method to increase the feasibility of the prediction model and obtain the prediction interval of the main beam deflection deformation.(3)The feedback to the construction monitoring system of the long-span cable-stayed bridge in this paper is mainly reflected in two aspects.First,after identifying the main sensitive parameters of the structure,modify the parameters in the theoretical design model to achieve parameter identification feedback,and secondly to the cable-stayed bridge After the prediction of the deformation value of the main beam,it is compared with the theoretical value to achieve a higher precision control of the construction of the long-span concrete cable-stayed bridge.