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1、第28卷第2期公路交通科技Vol28No22011年2月JournalofHighwayandTransportationResearchandDevelopmentFeb.2011文章编号:1002-0268(2011)02-0057-08斜拉桥初始平衡构形的确定方法陈素君,张国刚,唐盛华,方志(湖南大学土木工程学院,湖南长沙410082)摘要:为准确模拟斜拉桥成桥索力分布,在斜拉桥索力模拟常规迭代法的基础上,从迭代初值的选取和迭代加速的超松弛法两方面实现了迭代计算的加速。提出了成桥线形修正的建模坐标迭代法,与迭代加速法共同应用于斜拉桥的
2、初始平衡构形的建立。该方法建立的初始平衡构形快速准确的模拟了斜拉桥的索力分布和成桥线形,能够作为后续分析的起始状态。通过对斜拉桥初始平衡构形的动力性能计算,分析了初应力效应、斜拉桥几何非线性及索力误差对其的影响,得出如下结论:斜拉桥动力特性分析,应考虑初应力效应和几何非线性效应的影响,并且,准确模拟斜拉桥成桥索力和线形,将使动力计算结果更为精确。关键词:桥梁工程;初始平衡构形;索力模拟;斜拉桥;迭代加速法;线形修正;动力特性中图分类号:U44827文献标识码:AStudyonMethodofDeterminingInitialEquilibriumCon
3、figurationofCablestayedBridgeCHENSujun,ZHANGGuogang,TANGShenghua,FANGZhi(CollegeofCivilEngineering,HunanUniversity,ChangshaHunan410082,China)Abstrac:tToobtaintheaccuratesimulationofthecableforcedistributionofcablestayedbridge,basedonthegeneraliterationmethodsofcableforcesimulation,am
4、ethodforacceleratingiterationwasobtainedfromthetwoaspectsincludingtheselectionofinitialvaluesandoverrelaxationiterativemethod.Themodelingcoordinateiterationmethodforbridgecurveshapecorrectionwasgiven,andthismethodwassuccessfullyappliedincompanywiththeacceleratediterationmethodinthemo
5、delingofinitialequilibriumconfigurationofcablestayedbridge.Thecableforcedistributionandbridgecurveshapeweresimulatedquicklyandaccuratelybytheinitialequilibriumconfigurationofcablestayedbridgeestablishedbythemethod,anditcanbeservedasastartstateforfurtheranalyses.Bycalculatingthedyna
6、micpropertyoftheinitialequilibriumconfigurationofcablestayedbridge,theimpactofinitialstress,geometricnonlinearityandcableforceerroronthedynamicpropertywereanalyzed.Itisconcludedthattheimpactofinitialstressandgeometricnonlinearityshouldbeconsideredindynamicanalysisofcablestayedbridge,
7、andaccuratesimulationofcableforcedistributionandbridgecurveshapecanprovidemoreaccurateresultsofdynamicanalysisofcablestayedbridge.Keywords:bridgeengineering;initialequilibriumconfiguration;cableforcesimulation;cablestayedbridge;acceleratediterationmethod;curveshapecorrection;dyna
