Study Of Construction Monitoring And Control On PC Rigid-frame-continuous Beam Combined-system Bridge With More Spans

The prestressed concrete(PC) rigid-frame-continuous-beam combined-system bridgecombines the advantages of the two types of bridges. It has certain advantages in terms ofmechanical properties, using functions and terrain adaptability. To ensure the safety of thewhole construction process and the bridge line and internal forces to meet the designrequirements, the appropriate monitoring and control of the whole construction process wereneeded. Therefore, carrying out the research of monitoring and control about the wholeconstruction for PC rigid-frame-continuous-beam combined-system bridge has importantengineering value. In this paper, the research of monitoring and control about the wholeconstruction for the example engineering were carried out. The main contents of thedissertation were as follows.(1) The finite element models of the bridge were established by two different finiteelement softwares. Then, the calculation models were updated by combination the actualmaterial properties and boundary conditions. It could lay the foundation for the subsequentanalysis of the whole construction and construction monitoring work. According to the actualconstruction process of the example engineering, the analyses of the whole constructionprocess were carried out. And the results could provide the theoretical bases for monitoringprograms and the settings of construction camber.(2) The principles and basis of construction monitoring system were introduced in detail.According to the characteristics of rigid-frame-continuous-beam combined-system bridge, themain contents of construction monitoring system for the bridge were determined. And theimplementation details of its construction monitoring were analyzed. The detailedrequirements of construction quality and security were proposed.(3) Through comparative analysis of the measured data and theoretical data, the finiteelement model was updated by using inverse analysis and parameter identification. The aimwas to consistent the updating model with the actual bridge structure. The current status of thecompleted construction beam segments were understood by analyzing of measured andtheoretical data. The automatic adaption control method was used to guide the formworkerection elevation and stress control of the subsequent beam segments. The ultimate goal wasto ensure the safety of the construction process, bridge linear and internal forces of finishedstate to meet the design requirements.