改进的PHC管桩与承台连接处桩端受力性能研究.docx

改进的PHC管桩与承台连接处桩端受力性能研究
摘要
本研究旨在探究改进的PHC管桩与承台连接处桩端受力性能，采用数值模拟与实验验证相结合的方法，从力学原理入手，对其受力情况进行分析，得出结论并提出改进措施。本研究结果表明，改进的PHC管桩具有较好的承载能力和受力性能，其桩端受力主要集中在桩内壁面处，对于改进措施，建议应考虑在桩端段采用加强筋和环向受压钢筋以提高其抗弯和承载能力。
关键词：改进的PHC管桩；承台连接；桩端受力；数值模拟；实验验证
Abstract
Thisstudyaimstoinvestigatethestructuralbehavioroftheimprovedpre-stressedhigh-strengthconcrete(PHC)pile-to-capconnectionthroughnumericalsimulationsandexperimentalverifications.Byanalyzingthemechanicalprincipleofthepile-to-capconnection,thisstudystudiedthestructuralbehaviorofthepileandprovidedsuggestionstoimprovethepile-to-capconnection.TheresultsshowthattheimprovedPHCpilehasgoodload-bearingcapacityandstructuralbehavior.Theloadatthepileendismainlyconcentratedontheinnerwallofthepile.Inordertoimprovethestructuralbehavior,itisrecommendedtousereinforcementbarsandtransversecompressionsteelbarsattheendofthepile.
Keywords:ImprovedPHCpile;Capconnection;Pileendload;Numericalsimulation;Experimentalverification
1.Introduction
ThePHCpipepilehasbeenwidelyusedinbridge,expressway,andotherfieldsduetoitshighstrength,gooddurability,andeasyconstruction.Itisusuallyusedtotransferthestructuralloadsfromthefoundationtothesoil.Thepile-to-capconnectioniscriticaltotheperformanceofthepilefoundation.Itensuresthatthepileandthecapactasamonolithicunitandtransmittheappliedloadssafelytothesoil.Ifthepile-to-capconnectionfails,itmaycausethestructuretocollapse,resultinginseriousdamagetopropertyandlife.Therefore,thepile-to-capconnectionhasbeenthefocusofmanyresearchers.
Somestudieshaveinvestigatedthepile-to-capconnectionusingvariousmethods,includingexperimentaltestsandnumericalsimulations.Theexperimentaltestswereconductedonfull-scalemodels,small-scalemodels,andphysicalmodelstoinvestigatethestructuralbehaviorofthepile-to-capconnection.Thenumericalsimulationswerecarriedoutusingfiniteelementmethods(FEM)ordiscreteelementmethods(DEM)tosimulatethepile-to-capconnection'sbehavior.
However,theconventionalPHCpile-to-capconnectionhassomedeficiencies,suchaspoorstructuralbehavior,stressconc