Sun Light Difference Exploration on Long-Span PC Continuous Rigid Frame Bridge

In the process of cantilever construction of the Long tan river bridge, A vertical and transverse thermal gradient model of PC box girder, which could apply in central south China, was presented. This model was compared with the measured data and the thermal effect was analyzed. Results show that the calculated with the model agrees well with field test result and the modle is of some value for the measurement of sun light thermal difference effect on box girder bridge.