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1、第35卷第5期东南大学学报(自然科学版)Vol135No152005年9月JOURNALOFSOUTHEASTUNIVERSITY(NaturalScienceEdition)Sept.2005润扬大桥结构健康监测策略111122缪长青李爱群韩晓林李兆霞吉林杨玉冬1(东南大学土木工程学院,南京210096)2(江苏省长江公路大桥建设指挥部,镇江212002)摘要:对建立大跨桥梁结构健康监测系统的关键问题———大跨桥梁结构健康监测策略进行了分析研究,阐述了大跨桥梁结构健康监测项目的选择依据、传感器优化布设的原则与主要依据、传感器选择的原则等.提出了综合考虑大桥的结构特点和各个方面对系统
2、功能的要求,通过费用效益比分析,确定长期监测和周期检测内容的项目选择原则.关于传感器的布设,提出了遵循从状态评估的需要出发,以有效和经济为目标,使测点能够发挥最大效应的原则,综合结构安全评估、传感器布设优化理论等因素进行优化布设的方法.在有限元分析的基础上,应用遗传算法进行了润扬大桥结构健康监测系统振动和应变传感器优化布置的理论分析.然后进行了润扬大桥结构健康监测传感器系统的总体设计.关键词:结构健康监测;传感器;优化布置;有限元模型中图分类号:U445.7文献标识码:A文章编号:1001-0505(2005)0520780206Monitorstrategyforthestruct
3、uralhealthmonitoringsystemofRunyangBridge111122MiaoChangqingLiAiqunHanXiaolinLiZhaoxiaJiLinYangYudong(1CollegeofCivilEngineering,SoutheastUniversity,Nanjing210096,China)(2JiangsuConstructionHeadquartersoftheYangtseRiverBridge,Zhenjiang212002,China)Abstract:Akeyprobleminestablishingthehealthmoni
4、toringsystemforlargespanbridgestruc2tures,namelythestrategyforthehealthmonitoringoflargespanbridges,isanalyzedandinvestiga2ted.Thebasisofselectingthemonitoringitems,theprincipleandfoundationoftheoptimizingar2rangementfortransducers,andthepolicyfortheselectionoftransducersarepresented.Inselectin
5、gthemonitoringitems,itisproposedthatthelong2termandperiodicinspectioncontentsaredeter2minedbyanalyzingtheratioofexpensetobenefitbasedonacomprehensiveconsiderationforthestructuralcharacteristicsofthebridgeaswellasthesystemfunctionrequirementfromvariousas2pects.Withregardtothearrangementfortransd
6、ucers,theoptimizingtechniqueofmakingthemeas2urementpointsbringthemaximumeffectsbycolligatingthetheoriesofstructuralsafetyevaluationandsensorarrangementoptimization,soastosatisfytherequirementofstatusevaluationandachieveagoalofefficiencyandeconomy,ispresented.Basedonthefiniteelementanalysisforth
7、eRunyangYangtzeRiverBridge,thesimulationanalysesforthevibrationofstructuralhealthmonitoringsystemandtheoptimizinglayoutofstraintransducersareperformedusingthegeneticarithmetic.Anoverallplanofthetransducersystemsusedforthehealthmon
