Study Of Sunlight Temperature Effect For Cantilevered Box Girder Of Continuous Rigid Frame Bridge

The stress and deformation of the concrete box girder under the temperature load is one of the main factors affecting engineered quality. Regarding to this topic, although the domestic and international study has been started since the 60's of last century knowing by a careful literature review, the research on continuous rigid frame bridge which is affected construction control is no much. Therefore, to make the thorough and meticulous research for the temperature effect of the concrete box girder is necessary and meaningful.To reach the temperature distribution mode suitable for the bridge engineering, this paper precedes the regression analysis to get the semi-theoretical and semi-empirical type of temperature distribution according to actual measurement spot data in the field engineering of Hulu River Bridge. This paper also presents the curve diagram to compare with actual measurement spot data of other the mode to confirm the reliability and applicability of the recommended type .Finally this paper represents the comprehensive case study and analysis of temperature effect of the concrete box girder. Based on the analysis, the paper puts forward practical suggestion for the elevation and line shape controlling of the cantilever construction of main beam. At the same time, the paper can be references for the construction control of the continuous rigid frame.