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时间:2019-02-04
《钢纤维轻骨料混凝土叠浇双向板抗冲切试验研究》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.com2013年第8期(总第286期)混凝土混凝土制品Number8in2013(Tota1No.286)ConcreteCONCRETEPR0I)UCTSdoi:10.3969~.issn.1002-3550.2013.08.034钢纤维轻骨料混凝土叠浇双向板抗冲切试验研究赵顺波,杜中华。石风俊,李长永(华北水利水电大学土木与交通学院,河南郑州450011)摘要:介绍了8块钢纤维轻骨料混凝土叠浇双向板的抗冲切试验结果,叠浇双向板的冲切受拉区浇筑钢纤维轻骨料混凝土、受压区浇筑普通混凝土,板四边简支,采用板中心柱头加载方式。主要变化参数为钢纤维轻骨料混
2、凝土叠浇层的厚度,占板厚的比例为0、0.5、0.6和0.7。试验测得了板在各级荷载下的挠度、钢筋和混凝土应变、裂缝分布及开裂、钢筋屈服和极限荷载。结果表明:钢纤维轻骨料混凝土叠浇板的抗冲切承载力显著提高,抗冲切变形能力明显增强,冲切受拉面裂缝分布呈现出多条数细密化发展形态,板破坏时的延性有所增加。关键词:钢纤维轻骨料混凝土;双向板;叠浇厚度;承载力中图分类号:TU528.572文献标志码:A文章编号:l002—3550(2013)08—0123—04ExperimentalstudyonpunchingshearresistanceofSFRLACsuperposedtwo-wa
3、yslabsZHAOShunbo,DUZhonghua,SHIFengjun,LIChangyong(SchoolofCivilEngineeringandCommunication,NorthChinaUniversityofWaterResourcesandElectricPower,Zhengzhou450011,China)Abstract:Testresultsofeightsteelfiberreinforcedlightweightaggregateconcr~esuperposedtwo·wayslabswereintroduced.Theslabscompris
4、ethesteelfiberreinforcedlightweightaggregateconcreteinthetensileregionandtheordinaryconcreteinthecompressivereonun-derpunchingshear,whichweresimplysupportedundertheloadtransferredfromthetopofcentralcolumn.Themainparameterwasthesuper-posedthicknessofsteelfiberreinforcedlightweightaggregateconc
5、retelayerwhichwasthe0,0.5,0.6and0.7timesoftheslabthickness.Thetestresultsincludedthedeflectionatslabcenter,thestrainsofreinforcementandconcrete,thedistributionofcracksaswellastheloadscorrespond-ingtoconcre~cracking,reinforcementyieldandultimatestate.Itcouldbeconcludedthatthepunchingshearresis
6、tanceofsteelfiberreinforcedlightweightaggregateconcretesuperposedtwo-wayslabwasincreasedremarkably,theabilitytoresistthepunchingsheardeformationwasen-hancedobviously,manyfinecracksdistributedonthetensilesurfaceandtheductilityatfailurestateincreasedtoacertainextentKeywords:steelfiberreinforced
7、lightweightaggregateconcrete;two—wayslab;superposedthickness;resistance以形成一种新型的叠浇板,此叠浇板充分利用了轻骨料混0引言凝土自重轻、钢纤维增强轻骨料混凝土的抗冲切性能和普钢筋混凝土无梁板柱结构是一种常用结构体系,其结通混凝土抗压强度高的优越性。本研究介绍了这种叠浇双构形式简单、传力途径短捷、能充分利用净高空间,并有效向板的抗冲切承载力试验结果。减小结构的总高度,经济效益显著,适用于多层厂房、仓库1试验概
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