gfrp管—混凝土—钢管混凝土组合柱轴压性能试验研究

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1、GFRP管-混凝土-钢管混凝土组合柱轴压性能试验研究TheExperimentalStudyonGFRP--Concrete··Steel·-ConcreteDouble--SkinTubularHybridColumnsunderAxialCompressionAbstractInrecentyears，theinfrastructureconstructionofOarcountryentersthefastigiuln，especiallythecoastalengineering．Mostofthesestructuresselect

2、concretestructureandtheservicelifeisgenerallyrequiredmorethan100years，includingpiercomponentsofsea-crossingbridgeandcolumnsoftheoffshoreplatformasthemostimportantmechanicalcomponents．necorrosionresistanceofthestructureisSOvitalthatthedurabilityofthestructureisputatahigherpo

3、sition．Prof．Teng，whoworksintheHongKongPolytechnicUniversity，hasrecentlyproposedHybridFRP·concrete-steeldouble-skinmbularcolumn(DSTC)whichisanewformofhybridcolumns．Inthispaper，theobjectofstudyisGFRP—concrete-steel-concretedouble·skintubularhybridcolumn(calledhybridcohlrnn)．T

4、hehybridcolumnisformedbypouringconcreteimothemultipletubewhichisgeneratedonthebasisofDSTC．Fortheformofhybridcolumn，boththeconstraintofmultipletubeandthedurableperformanceoftheGFRPtubecarlbetakenfulladvantageof．Thetenhybridcolumnssubjectedtoaxialcompressiveloadingweretestedi

5、nthisarticle．Andthemajoreffectivefactors，suchasthethicknessofinterlayerconcrete，thespeciesofinterlayerconcrete(ordinaryconcrete，self-compactingconcrete，self-stressingandself-compactingconcrete)andtheloadingmethods，wereresearchedinthispaper．Conclusionsaredrawnasfollows：(1)Wh

6、atevertheloadingmethodsare，thehybridcolumnsareshowinggoodductility．Whiletheinterlayerthicknessislarger，theductilityofspecimenisbetter．Bythecomparisonofthreekindsofinterlayerconcrete，withthecomprehensiveconsiderationofthebearingcapacityandtheductility，theself-compactingconcr

7、eteisperferredtobeused．(2)Byanalyzingthecollaborativeperformanceofthehybridcolumnsundercoreloadingconditions，thesmallerinterlayerthicknessCanreflectthebettercollaborativeperformance．Theself-stressingandself-compactingconcreteissuperiortoothermaterials．Thereisnoobviousdiffer

8、encewitllthecomparisonofthehybridcolumnsunderfull—sectionalloadingcondition．(3)Int