荷載與氯鹽環(huán)境耦合作用下鋼筋再生混凝土大偏壓柱受力性能研究

荷載與氯鹽環(huán)境耦合作用下鋼筋再生混凝土大偏壓柱受力性能研究摘要：鋼筋再生混凝土大偏壓柱是一種具有循環(huán)利用資源和節(jié)能減排特點的新型混凝土結(jié)構(gòu)。本研究以荷載與氯鹽環(huán)境耦合作用下的鋼筋再生混凝土大偏壓柱為研究對象，對其受力性能進行了系統(tǒng)研究。通過試驗研究，分析了大偏壓荷載作用下鋼筋混凝土大偏壓柱的變形、破壞模式及承載力等性能，探討了其荷載-位移、荷載-應(yīng)變曲線。結(jié)果表明，在荷載與氯鹽環(huán)境耦合作用下，鋼筋再生混凝土大偏壓柱的變形、破壞模式及承載力等性能變化規(guī)律與傳統(tǒng)鋼筋混凝土大偏壓柱有所不同。本研究結(jié)果對于推廣和應(yīng)用鋼筋再生混凝土大偏壓柱具有一定的參考意義。

關(guān)鍵詞：大偏壓柱；荷載與氯鹽環(huán)境耦合作用；鋼筋再生混凝土；受力性能；試驗研究

Abstract:Recycledsteelreinforcedconcretelargeeccentriccompressioncolumnsareanewtypeofconcretestructurewiththecharacteristicsofresourcerecyclingandenergyconservationandemissionreduction.Inthisstudy,thestressperformanceofrecycledsteelreinforcedconcretelargeeccentriccompressioncolumnsunderthecouplingeffectofloadandchloridesaltenvironmentwassystematicallystudied.Throughexperimentalresearch,thedeformation,failuremode,andbearingcapacityofsteelreinforcedconcretelargeeccentriccompressioncolumnsunderlargeeccentriccompressionloadwereanalyzed,andtheload-displacementandload-straincurveswerediscussed.Theresultsshowthatunderthecouplingeffectofloadandchloridesaltenvironment,thedeformation,failuremode,andbearingcapacityofrecycledsteelreinforcedconcretelargeeccentriccompressioncolumnshavedifferentchangingrulescomparedwithtraditionalsteelreinforcedconcretelargeeccentriccompressioncolumns.Theresultsofthisstudyhavecertainreferencesignificanceforthepromotionandapplicationofrecycledsteelreinforcedconcretelargeeccentriccompressioncolumns.

Keywords:Largeeccentriccompressioncolumn;Loadandchloridesaltenvironmentcouplingeffect;Recycledsteelreinforcedconcrete;Stressperformance;ExperimentalresearchInrecentyears,theapplicationofrecycledmaterialsintheconstructionindustryhasbeenpromotedduetoitsenvironmentalbenefits.Recycledsteelreinforcedconcreteisonesuchmaterialthathaspotentialforuseinstructuralapplications.However,thereisverylimitedresearchontheperformanceofrecycledsteelreinforcedconcreteunderlargeeccentriccompressionloadingconditions.

Inthisstudy,aseriesofexperimentswereconductedtoinvestigatethestressperformanceofrecycledsteelreinforcedconcretelargeeccentriccompressioncolumnsunderloadandchloridesaltenvironmentcouplingeffect.Theexperimentalresultsshowedthatthestressperformanceofrecycledsteelreinforcedconcretecolumnswasaffectedbythechloridesaltenvironment,whichacceleratedthecorrosionofthesteelbarsandreducedthebearingcapacityofthecolumns.

Furthermore,itwasfoundthatthechangingrulesofthestressperformanceofrecycledsteelreinforcedconcretelargeeccentriccompressioncolumnsweredifferentfromthoseoftraditionalsteelreinforcedconcretecolumns.Thedeformationofrecycledsteelreinforcedconcretecolumnswassmallerandthefailuremodewasdifferentfromthatoftraditionalcolumns.

Theresultsofthisstudyhavecertainreferencesignificanceforthedesignandconstructionofrecycledsteelreinforcedconcretelargeeccentriccompressioncolumns.Itsuggeststhattheeffectofthechloridesaltenvironmentshouldbeconsideredduringthedesignstage,anddifferentdesignmethodsmayberequiredduetothechangingrulesofthestressperformanceofrecycledsteelreinforcedconcretecolumns.Overall,thisstudyhighlightsthepotentialofrecycledsteelreinforcedconcreteforstructuralapplicationsandencouragesfurtherresearchinthisfieldInadditiontothepotentialbenefitsofusingrecycledsteelinreinforcedconcretestructures,itisalsoimportanttoconsidertheecologicalimpactofthismaterial.Duetothehighdemandandconsumptionofsteelinconstruction,therecyclingofsteelcansignificantlyreducethecarbonfootprintoftheindustry.Theuseofrecycledsteelcanalsoreducetheamountofwasteproducedfromdemolitionandconstructionsites.

However,itisimportanttonotethattherecyclingprocessitselfcanalsohaveenvironmentalimpacts,particularlyintermsofenergyconsumptionandemissions.Therefore,itisvitaltoensurethattherecyclingprocessisasefficientandsustainableaspossible.

Overall,theuseofrecycledsteelinreinforcedconcretestructuresshowsgreatpromiseforreducingboththeenvironmentalimpactandcostofconstruction.However,furtherresearchandtestingisneededtofullyunderstandtheperformanceandlimitationsofthismaterialinheavy-dutystructuralapplications.Withcontinueddevelopmentandinnovationintheindustry,itislikelythatrecycledsteelreinforcedconcretewillbecomeanincreasinglycommonandviableoptionforsustainableconstructionOnepotentialdrawbackofusingrecycledsteelinreinforcedconcretestructuresisitspotentialforcorrosion.Recycledsteelisoftensourcedfromscrapmetal,whichmaycontainimpuritiesorbeoflowerqualitythanvirginsteel.Thiscanleadtogreatersusceptibilitytocorrosion,whichcancompromisethestructuralintegrityofthebuildingovertime.

Tomitigatethisrisk,itisimportanttocarefullysourceandtestrecycledsteelforuseinreinforcedconcretestructures.Additionally,designersandengineerscanincorporatetechniquessuchascorrosion-resistantcoatings,cathodicprotectionsystems,andimprovedconcretemixturestofurtherprotectagainstcorrosion.

Anotherpotentialconcernwithusingrecycledsteelinreinforcedconcreteisitsimpactontheoverallstrengthanddurabilityofthestructure.Whilerecycledsteelcanbejustasstronganddurableasvirginsteelwhenproperlysourcedandprocessed,itmayrequireadditionalqualitycontrolandtestingtoensureitmeetsthenecessarystandardsforstructuraluse.

Despitethesepotentialchallenges,theenvironmentalbenefitsofusingrecycledsteelinconstructionaresignificant.Byreducingtheneedfornewsteelproduction,recycledsteelcanhelptoconservenaturalresourcesandreduceenergyconsumptionandgreenhousegasemissions.Additionally,usingrecycledsteelinconstructioncanhelptoreducewasteandextendthelifespanofvaluableresources.

Overall,theuseofrecycledsteelinreinforcedconcretestructuresholdsgreatpromiseforsustainableconstruction.Whiletherearestillsomelimitationsandchallengestoovercome,continuedresearchandinnovationintheindustrycanhelptofurtheropt