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The Study of the Key Technology on Long-span Prestressed Continuous Bridge in Construction Control

Author: MaJianFei
Tutor: LuZheAn
School: Wuhan University of Technology
Course: Structural Engineering
Keywords: Span bridges Construction Control Simulation Analysis Grey System Theory
CLC: U445.4
Type: Master's thesis
Year: 2006
Downloads: 341
Quote: 15
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Abstract


Prestressed concrete continuous beam bridge as a structure stiffness, spanning capacity of the bridge, in recent decades has been considerable development. Large span prestressed concrete continuous box girder cantilever casting construction process , construction control is a complex dynamic system engineering, is to achieve River Bridge linear, forces an important means to meet the design requirements . This paper summarizes the work and learning on the basis of previous research , combined with government Panlong River Bridge construction control practices for large span prestressed concrete continuous beam bridge construction monitoring of key technology research . Mainly done the following several aspects: 1, the analysis of the continuous beam bridge construction control factors and error adjustment method. 2, continuous beam bridge cantilever construction in the evolution of structural forces were analyzed for both advantages and disadvantages of structural analysis methods were compared . 3 , the establishment of a comprehensive monitoring system construction , the construction of a bridge on the actual status of follow-up observations . Using the finite element software MIDAS / civil, right Panlong River Bridge House entire construction process , structural system conversion for the simulation analysis , forecasting and analysis Precamber size. Meanwhile, the study of dead load , prestressed concrete shrinkage and creep on the contribution of camber effects , and the main design parameters of the sensitivity analysis , has been its impact on the camber range . The concrete box girder stresses measured value and MIDAS / civil theoretical values ??calculated are compared , the results showed that the measured value is in good agreement with the theoretical value . 4 , according to the theory of gray system GM (1,1) model , the ideal state and the measured state camber difference as gray differential series modeling , forecasting actual state and the ideal state to be the construction phase deviation . Into a bridge girder elevation measured data show that the finite element software MIDAS / civil provide theoretical camber formwork for determining segment elevation has a good guide ; gray prediction control system can not only long-span continuous beam bridge construction control , and the method is simple, the effect is significant .

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge Construction > Construction Technology
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