Gaoxinsilu Yihe Bridge Structural Characteristics Analysis And Construction Control

The continuous steel trussed arch bridge has not only a strong bearing capacity and crossing ability,but also a modelling grand.It is more and more popular with the designers.But steel trussed arch bridge has a complex construction process,and there is structure system transformation.So the safety of the construction process and state after the construction is particularly important.In order to ensure the safety of the construction process and the structure of the linear and internal force meet the design requirements,construction control for bridge structure should be carried out.In this paper,based on Gaoxinsilu Yihe bridge in yichuan county of henan province as engineering backgroung, combining with the actual construction process,with main parameters (linear and stress) in the process of construction control as the research object, through the finite element software Midas/Civil construction stage simulation model was set up. Mainly to the main girder structure in the process of cantilever bar of force and node displacement is analyzed,and in the field measured data in the process of construction control was compared. Analysis results show that in the process of construction of displacement of each node is little, meet the requirements of construction allowed error, the structure of the linear control well. Each construction stage and bar stress within the allowable range,as a bridge to provide premise, also guarantee the safety of the construction process.Finally, on the static characteristics of operation stages are analyzed.Gaoxinsilu Yihe bridge’s dead load effect, the effect of total load effect of live load of 30%～40%, mainly for the automotive load effects,the influence of temperature load on the structure is not obvious,at the same time in the structure of bridge operation stages into state each index within the prescribed scope, meet the basic requirements into the bridge operation.The results also proved that the finite element software simulation is relatively reasonable, close to the actual structure of the state.