Research On Temperature Effects And Shrinkage-Creep Analysis For Long-span Prestressed Concrete Continuous Rigid Frame Bridges

Recently, based on the economic development of our country, many long span prestressed concrete continuous rigid frame bridges are built. With the establishment of this type bridge, many researches paid great attention on the temperature effects and Shrinkage-Creep analysis. The study on this field have already advanced very much, however, there are few analysis about the influence of temperature effects and Shrinkage-Creep analysis on long span prestressed concrete continuous rigid frame bridges combined with actual bridge.Based on the measurement of temperature distribution field of Xinzhaihe bridge due to solar radiation, we obtain the fitting curve of vertical temperature difference distribution of box girders and lognitudinal temperature difference distribution of hollow pier. Applying the soft of MIDAS/Civil, the paper analyzed the bridge using measured temperature gradient or temperature gradient according to General Code for Design of Highway Bridge and Culvert.Through comparing the result, some conclusions are put forward. The mid-span deflection of continuous rigid-frame increases when the span and the service life growth, this will influence passengers comfort and affect the running safety. The mid-span deflection of prestressed concrete continuous rigid frame bridges is an open question. The paper adopted the software of Bridge Doctor to analysis the influence of shrinkage and creep on the deflection and stress of bridge and obtained some conclusions.