Study On Temperature Change Effect Of Thin-walled Hollow Of Super-high Pier

Long-span structures across the river and mountains tend to first choice. But in recentyears, many scholars have found that the temperature difference loads of high pier can notbe ignored. Especially in the ultra-high pier temperature effect is more obvious. That makesthe study of sunshine temperature load become particularly important.In this paper with the Three River Bridge in shaanxi xunyi under construction, wemainly had ultra-high rectangular thin-walled hollow pier180m the temperature field testedand detailed data analysied and analyzed the relationship between the bridge pier topdisplayment and temperature field by Finite element software Midas FEA.We carefully analysis of the temperature field distribution along the thickness directionaccording to the data by measured in project site,then summed up the temperature fieldequation that appropriate area of Shaanxi Xunyi summer and winter. The formula not only hasbetter accuracy compacted with the measured data but is easy to use.that is available forfuture calculations of such piers or design reference in the area.We analysised the relationship between the temperature difference along the thicknessdirection of sunshine and deviation between the top of the pier by measured the,measureddisplacement of pier top and the day temperature field data.We calculated the displacement oftop pier based on that day temperature field data and the formula in the chapter III by MidasFEA. Finally, we compared displacement of the pier top the measured data,calculateddisplacement according on the day temperature field data and calculated displacementaccording on the fitting formula.Result showed that the data has a good engineering referencevalue for future analysis in the design calculations for this pier form.Finally, we proposed three possible measures to reduce the effects of temperaturedifference on the bridge structure.