Study On The Construction Control Of Long Span Cable-Stayed Bridge With Steel-Concrete Composite Beam

With the span of long span cable-stayed bridge constantly refreshing,the structure shape is more and more novel.At the same time,higher requirements for construction accuracy are put forward,followed by a series of precision problems in the construction process.The construction process of long-span cable-stayed bridge should be monitored.Therefore,the establishment of a set of reasonable monitoring scheme is the premise to ensure the safety and smooth progress of engineering construction.In this paper,a long span cable-stayed bridge in Ganjiang River is used as the engineering background.The main contents are as follows:(1)Through reading a large number of documents,the development of cable-stayed bridge,the main methods,links and principles of construction monitoring of cable-stayed bridge are understood,and the engineering information of a long-span cable-stayed bridge in Ganjiang River is introduced,including: the overall span information,steel-mixed beam of the main beam situation,the main tower situation,construction technology and structural restraint system.(2)The three-dimensional spatial model of cable-stayed bridge with steel-concrete composite beam is established by using the finite element analysis software Midas Civil.And the stress and deformation,main Leung and deformation of the cable force and the main tower under the condition of reasonable bridge of cable bridge are determined..(3)Analyze the construction process of the cable-stayed bridge.Analyze the tension force of each stage and the stress and deformation of each structure of the whole bridge,and compare the analysis results of the construction stage with the reasonable state of the bridge.Determine the construction monitoring data.On the basis of the construction monitoring data of cable-stayed bridge,the measuring points of construction monitoring are arranged reasonably,including the position and quantity of main tower,stay cable and main beam.Finally,the sensitivity analysis of structural parameters of cable-stayed bridge is presented.