Research On Stability Against Overturning Of Single Column Pier Curved Bridge

For a long time, curved bridges have been built mostly with reference to the existingbridges, specification management of camber beam is not as regulate as straight bridges.Even for small radius curved bridge, the design of them is often in accordance withstandard of straight bridges, which is unreasonable. Single column pier curvedbridgeResearch on single column pier curved bridge are even fewer, especially in the"torsion" coupling, such a bridge is easy to capsize. There have been several incidentsoccurred to this form of bridge and how to ensure the normal use of the bridge operatorsbecome an urgent problem.. This paper focuses on points of stabilities against overturningof single column pier curved bridge and made a scrutiny into its influencing factor. So avariety of factors have been analyzed about mechanical changes of camber beam and tofind its effect on the overturning performance.Firstly, this paper explores the mechanical characteristic of curved bridge, thecurrent research, as well as the problems of such bridges in operating and demonstrated thenecessary of this research topic. In addition theoretical methods of curved bridge have beenelaborated and put forward various factors that may affect its performance againstoverturning.Secondly, through the engineering examples, this paper use The finite elementsoftware MIDAS CIVEL to make computational analysis to identify the curved bridgebearing void law.The pre-eccentric bearing, bearing spacing, moving load, bearing form,and temperature effects, etc. factors are discussed in detail to find out their effect onoverturning of curved bridge. And it explains that such considerations on the curved bridgeto prevent "lateral movement” and bearing separation are significant.Ultimately, we reach the conclusion that: Single column pier curved bridge is likely tohave "lateral movement”, With the gradual increase in moving loads, rapid reaction forceto reduce the inside until a negative reaction force caused by bearing Void phenomenon;Attention of a combination of factors should be paid in the pre-eccentric design, not onlyproceed from a single aspect; Design of bearing spacing and layout need to combine theactual engineering, multi-select is essential in order to determine the best arrangementand spacing; Effects of temperature on overturning of ingle column pier curved bridge cannot be ignored.