Temperature Effect Research Of Long-span Steel Box Girder Cable-stayed Bridge

Along with the development of long-span bridges, a lot of steel box girder cable-stayed bridge has been widely applied in the high way. In the construction of the steel box girder cable-stayed bridge, the effects of the temperature can't be ignored. Because of the temperature load, it leads to large deviation between the state of actual construction and the state of design. So, based on the Jinan Yellow River Bridge, studies on temperature effects of steel box girder cable- stayed-bridge r are carried out in following text.Firstly, the theoretical research and application of box girder cable-stayed bridge are reviewed. Based on the principle of thermal transition, the dissertation discusses the main analytical methods of temperature filed. Then, it also instructs the methods of calculating temperature effects.Based on the construction control of the Jinan Yellow River Bridge, the analysis of the temperature effects are carried out to the PC Tower and steel box girder. Then, the temperature curved fitting are made to key section. Using the FEA program ANSYS, MIDAS, the temperature effects of PC bridge tower and steel box girder are researched. Then, highlights the temperature effects of steel box girder linear, stress, bridge pier reaction, and the folded width in the stage of the incremental launchingAnalyze different parameters of the temperature effects. Detailed study is carried out from the following parameters, such as the whole rising and falling bridge temperature, the temperature difference among Cable, Tower and Girder, the different temperature of Tower, the different temperature of Girder and so on. In the text, mainly focuses on the temperature effects to the elevation of the Girder, the force of Cable and the deviation of Tower.Finally, Basing on collected temperature data, detailed study is carried out to the temperature effects. Analyze three Cable force changes pattern with the ambient temperature in one day. Discuss the temperature effect of the bridge in the harmful time of the day.And give the rang of cable force and girder displacement changes. Provides the necessary information for the design and construction of steel box girder cable-stayed bridge...