| With the increase of traffic flow and the broadening of width of bridges,the space issue is more and more prominent in the process of bridge construction,which leads to the change from the analysis of frame structure to spacial entity in bridge construction monitoring to ensure the safety of bridge during construction.Through theoretical analysis and research,a simple and feasible method of single tower cable-stayed bridge construction control is set up,and the feasibility of the method is verified in this dissertation.The main contents of this dissertation are as follows:(1)By using finite element analysis software Midas Civil,the global beam-column elements model is established,and two main stages of construction including the maximum cantilever state and the completed bridge are analyzed,and the internal force,stress and deformation of girder,tower and cable are gotten.The results show that the stress and deformation of the bridge meet the requirements of the code.(2)The finite element software Midas FEA is used to establish a solid element model of the four sections of the main beam: the standard section of 0# block,the standard section with the 2.5m rib width,the standard section with the 2.0m rib width,and the anchor section.The stress distribution of each segment in the maximum cantilever stage and the completed stage is analyzed.(3)The stress variation law is obtained,and the arrangement of longitudinal stress measuring point is optimized by co MParing the results of the longitudinal stress of the solid element and beam element model.Combined with the commonly used construction control method,a set of construction monitoring scheme for this single tower cable-stayed bridge is presented.(4)The accuracy of this construction control method is verified based on the co MParison between the theoretical value and the measured value of the main girder stress in the construction process of the main bridge of the Chuangye Bridge. |
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