The Research Of Temperature Field On G325 Jiujiang Cable-stayed Bridge

The temperature effect of concrete cable-stayed bridge influences structure stress and deformation which affect the safe operation of bridge. The research of temperature effect has pr actical significance on the research of bridge temperature field. To inve stigate the temperature data, this thesis is on the basis of the data collection from the structural health monitoring system on Jiujiang Bridge cable-stayed bridge. Through statistically processing of valid data, the daily and yearly temperature variation on measur ing point and a full life si mulation of bridge were got by statistical techni ques and temperature field life-cycle simulation technology. To inve stigate the stress which influenced by the bridge tower temperature effect, a quantitative analysis on finite ele ment were made. The following is the main content of this paper.(1) Through the partial-average imputation, the all year temperature data o f five different points(JM21- JM25) on typical box-girder section were obtained by long-term observations of the structural health monitoring system on G325 Jiujiang Bridge.(2) The te mperature JM2 different points throughout the year probability-density distribution and the temperature of the sample JM22 typical diurnal variation curve were studied by researching annual compensation data. According to full year actual monthly extremes, least squares estimation method was used on research of march extreme models.(3) The cable-stayed bridge box-girder temperature field on G325 Jiujiang Bridge Simulation whole life years was established by numerical inverse transform sampling and temperature sample adjust ment theory. With these, Jiujiang Bridge full sample mo del and th e temperature difference life mode wer e obtained and could be used to generate the temperature field of concrete box girders G325 Jiujiang Bridge Temperature Effect of whole life.(4) To investigate the two-dimensional finite element model which influenced by the different temperatures on both sides of bridge towers, a quantitative analysis on finite element were made by ANSYS.