钢筋混凝土核心筒结构非线性有限元分析

《钢筋混凝土核心筒结构非线性有限元分析》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、钢筋混凝土核心筒结构非线性有限元分4?栋樊成馳丽麵奎瑶亮山东省环科院环境工程有限公司大连大学材料破坏力学数值试验研宄中心郑州大学土木工程学院钢筋混凝土核心筒作为高层建筑结构中的一种重要抗侧力构件，对其进行弯剪扭组合作用下力学性能研究非常具有必要性。基于已有的试验基础，对所选取试验模型进行合理的有限元建模与分析，所得到的分析结果与原有试验结果吻合良好。在此基础上对钢筋混凝土核心筒有限元模型进行偏心推覆加载分析，并考虑了高宽比、连梁配筋率、轴压比、偏心率对核心筒承载力的影响。结果表明：在偏心荷载作用下，随高宽比增加，核心筒承载力降低，破坏模式向弯扭

2、破坏转变;连梁配筋率提高有利于提高筒体承载力;筒体承载力随轴压比的增加呈现先增加后减小的趋势，过大的轴压比将导致简体的脆性破坏;随偏心率增加，简体承载力下降，但偏心率的增加在一定程度上对于筒体的延性发挥有利。关键词：钢筋混凝土核心筒;偏心加载;承载力;非线性有限元分析;陈栋，硕上，Email:chendong200704005@163.com。NonlinearfiniteelementanalysisofreinforcedconcretecorewallsChenDongFanChengSunShaoliXuTaoLiYaoliangEnv

3、ironmentalEngineeringCo.，Ltd.，ofShandongAcademyofEnvironmentalScience;ResearchCenterforNumericalTestsonMaterialFailure，DalianUniversity;SchoolofCivilEngineering.ZhengzhouUniversity;Abstract：Itwasverynecessarytostudythemechanicalpropertiesofreinforcedconcretecorewallsunderthe

4、comprehensiveloadwhichincludingbending,shearandtorsion,becausethereinforcedconcretecorewallsworkasanimportantanti-lateralforcecomponentinhigh-risebuildingstructures.Thefiniteclementmodelswereestablishedandanalyzedreasonablybasedonthetestandtheresultsfitthetestwell.Basedonthe

5、abaveresults,theeccentricloadinganalysiswasappliedonthefiniteelementmodelstoanalyzethecopacityofconcretecorewalls,andtheheight-widthratio,reinforcementratioofcouplingbeam,theaxialcompressionratioandeccentricitywasconsideredinthissimulationprocess.Theresultsshowthat:underthee

6、ccentricload,theload-carryingcapacitydecreaseswiththeincreaseofheight-widthratioandthefailuremodeturnstobendingtorsionfailure;theload-carryingcapacityincreaseswiththeincreaseofthecouplingbeamreinforcementratio;theload-carryingcapacityincreasesatthebeginningandthendecreaseswi

7、ththeincreaseofaxialcompressionratioandtheexcessiveaxialcompressionratiowillleadtoabrittlefailuremode;theincreaseofeccentricityratiowillresultinthedecreaseofload-carryingcapacity,buttheincreaseofeccentricityratiowillcontributetothedevelopmentofductilityforreinforcedconcretec

8、orewalls.Keyword：reinforcedconcretecorewall;eccentricloading;load-carryingc