Research on representative value of temperature difference of concrete curved beam bridge based on measured data

• 1、 Civil Engineering School, Zhengzhou University，Zhengzhou 450001

Abstract：For the curved beam bridge under the action of temperature load, vertical deformation, tangential displacement and lateral displacement will occur, and the lateral displacement seriously affects the safety and durability of the curved beam bridge.In this paper, a fiber-optic sensor is used to monitor the prestressed concrete in-service curve beam bridge of an asphalt pavement in real time. And recorded a year temperature data.The representative values of the temperature difference of the curved beam bridge were analyzed and calculated by cluster analysis, parameter estimation and hypothesis testing.The results show that the vertical and horizontal maximum positive temperature difference of the in-service curved beam bridge of asphalt pavement obeys the two-parameter Weibull distribution. The vertical maximum daily positive temperature difference is 21.7 C, the frequency is 21.4 C, and the quasi-permanent value is 20.3 C.The horizontal maximum daily temperature difference is 14.1 C, the frequency is 13.7 C, and the quasi-permanent value is 12.6 C. The standard value of the lateral temperature difference accounts for 64.9% of the vertical direction, which provides a basis for the value of the temperature in the calculation of the curved beam bridge.

Keywords： bridge engineering Curved beam bridge Temperature difference Cluster analysis Weibull distribution