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ID:32446052
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页数:4页
时间:2019-02-04
《钢筋混凝土包护结构应力波传播特性研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、学兔兔www.xuetutu.com2014年第4期(总第294期)混凝土理论研究Number4in2014(Tota1No.294)ConcreteTHE0RETICALRESEARCHdoi:10.3969~.issn.1002-3550.2014.04.004钢筋混凝土包护结构应力波传播特性研究瞿立夏,龙士国(湘潭大学材料与光电物理学院,湖南湘潭411105)摘要:采用数值计算法,研究了应力波在钢筋混凝土包护结构中传播特性。针对两种注浆特性的混凝土钢筋包护结构:混凝土注浆脱空50%和混凝土注浆完全脱空,建立了两组对应的钢筋混凝土包护结构数值模型。通过ANSYS/LS—DYNA
2、有限元软件计算得到应力波在两组模型中传播的时域信号,根据所得的时域信号分析得出应力波在两类模型中传播的固结波速和平均振幅比。结果表明:在注浆脱空50%情况下固结波速处于3200--4300rn/s范围内,并随着注浆脱空尺寸的增加而增大,平均振幅比处于O.15~0.85范围内,并随着注浆脱空尺寸的增加而减小;在注浆完全脱空情况下固结波速处于3400-4400m/s范围内,并随着注浆脱空尺寸的增加而增大,平均振幅比处于O.1~0.75范围内,并随着注浆脱空尺寸的增加而减小。关键词:应力波;钢筋混凝土包护结构;有限元;固结波速;平均振幅比中图分类号:Tu528.571文献标志码:A文章编
3、号:1002—3550(2014)04—0013—04EfectofmissinggroutonthepropagationofstresswaveinreinforcedconcretestructureQuLixia,LONGShiguo(FacultyofMaterials,OptoelectronicsandPhysics,XiangtanUniversity,Xiangtan411105,China)Abstract:Studiedtheefectofpropagationcharacteristiconstresswaveinreinforcedconcretestru
4、cturebyusingnumericalsimulationmethod.Theconcretestructurecallbeclassifiedintotwocategorieswithrespecttothemissinggrout:reinforcedconcretestructurewithmissinggrout50%andreinforcedconcretestructurewithcompletemissinggrout,inlightofthesemissinggrout,numericalmodelforrein‘forcedconcretestructurew
5、asbuilt.ThetimedomainsignalofstresswavepropagationinthetwomodeswerecalculatedbyfemsoftwareANSYS/LS—DYNA,accordingtotheresultsoftimedomainsignal,wecangettheconsolidatingwavespeedandaverageamplituderatioatwhichstresswavepropagatesinthetwomodels.Theresultsdemonstratethattheconsolidatingwavespeedi
6、ntherangeof3200m/sto4300rn/sincaseofmissinggrout50%。andincreaseswiththeincreasemissinggroutsize,inaddition,averageamplituderatioatO.15toO.85andincreaseswiththeincreasesofsizeofmissinggrout;theconsolidatingwavespeedintherangeof3400m/sto4400rrgsincaseofcompletemissinggrout,andincreaseswiththeinc
7、reasemissinggroutsize,inaddition,averageamplituderatioatO.1to0.75andincreaseswiththeincreasesofsizeofmissinggrout.Keywords:stresswave;reinforcedconcretestructure;finiteelement;consolidatingwavespeed;averageamplituderatio波检测法作为一种用于岩土工程领域
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