IR
基于体外预应力简支技术的混凝土结构整体加固抗震性能研究
Project Number51468040
宋彧
Abstract结构加固是节约社会资源的有效途径之一,体外预应力技术具有独特的结构加固优势。课题通过分析整体加固结构性能的影响因素,根据加固技术的特点,合理的选取参数,拟用体外预应力简支加固技术和梁端弯矩主动调幅的思想,实现梁端抗弯能力相对加固,为钢筋混凝土结构整体加固理论分析创造条件。1)确定梁-索组合单元的边界条件,分别建立其力学模型;2)考虑结构几何非线性和材料非线性,分析体外预应力梁-索组合单元变形协调机理,建立理论分析模型,并对模型进行试验验证;3)把梁-索组合单元理论模型嵌入在通用有限元分析软件中,创建钢筋混凝土结构整体加固理论分析的新方法,通过理论分析与试验验证相结合,研究地震作用下多高层钢筋混凝土结构体外预应力简支加固技术整体加固的结构内力分布规律,为多高层钢筋混凝土结构整体加固设计计算和理论分析提供依据和手段。【英文摘要】Thestructuralretrofitisoneoftheeffectivewaystosavesocialresources.Amongtheretrofitapproaches,externalprestressreinforcementtechnologyhasitsuniqueadvantage.Accordingtothemaininfluencingfactorsfortheperformanceofoverallretrofit,externalprestresssimply-supportedreinforcementtechnologyandtheideaofadjustingthebendingmomentsatbeamendsactivelyareproposedforenhancingthebendingcapacityatbeamendsrelativelyandcreatingtheconditionsforoverallretrofit.First,theboundaryconditionsofbeam-cablecombinationelementaredefinedandtheirmechanicalmodelsarebuiltrespectively.Second,takinggeometricnonlinearityandmaterialnonlinearityintoaccount,thedeformationcompatibilitymechanismofbeam-cablecombinationelementwillbeanalyzedanditsanalyticalmodelwillbebuiltandvalidatedexperimentally.Third,theanalyticalmodelofbeam-cablecombinationelementwillbeembeddedinthegeneralfiniteelementsoftwaretoobtainthespecializedsoftwareforanalyzingtheseismicperformanceofoverall-retrofittedreinforcedconcretestructures,thedistributioncharacteristicsofinternalforcesofmulti-storeyandtallreinforcedconcretestructureretrofittedbyexternalprestresssimply-supportedreinforcementtechnologyunderearthquakeinputswillbeinvestigatedvianumericalanalysisandexperimentalverification,thisprojectcancontributetoprovidingtheoreticalbasisandanalyticalmethodsfortheoverallretrofitdesignofmulti-storeyandtallreinforcedconcretestructures.
Subtype地区科学基金项目
Project Source国家自然科学基金
2015-01
End Date2018-12
MOST Discipline Catalogue11 - 工程与技术 ; 1105 - 建筑环境与结构工程
Host Institution兰州理工大学
Project Funding480000.0
CountryCN
Language中文
Document Type项目
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64726
Collection兰州理工大学
Recommended Citation
GB/T 7714
宋彧.基于体外预应力简支技术的混凝土结构整体加固抗震性能研究.2015.
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