文档摘要：新型上锚式灌浆金属波纹管连接是将灌浆波纹管预埋于局部增大截面的墩柱中并连接桥梁承台的构造,既具有上锚式的施工便捷性,同时也有良好的经济性.为研究上锚式灌浆金属波纹管连接预制墩柱的抗震性能,进行2根不同墩高的上锚式灌浆金属波纹管连接预制墩柱和1根混凝土现浇试件的拟静力试验,3根试件的缩尺比均为1∶2.5.试验中,各试件受恒定轴向压力,水平荷载以位移控制进行分级往复加载直至破坏.观察试件开裂损伤状态,分析试件的滞回特性、骨架曲线、延性、耗能能力、残余变形等抗震性能.研究结果表明:上锚式试件与现浇试件均形成了有效的塑性铰,但塑性铰形成位置和极限破坏特征有较大差异.上锚式试件在截面扩大段上方形成塑性铰,而现浇试件在墩底形成塑性铰,最终破坏时上锚式试件主筋均未发生拉断,而现浇试件的主筋出现了拉断;上锚式试件的屈服荷载、极限荷载均与现浇试件接近,分别为现浇试件的123.8%和113.7%,而其延性弱于现浇试件的延性,位移延性和曲率延性分别为现浇试件的75.9%和92.3%;墩高对上锚式灌浆波纹管连接试件的破坏模式和破坏特征有很大影响,矮墩未形成有效的塑性铰,表现出更多的剪切破坏特征,且延性差,曲率延性只有高墩试件的38%,耗能能力弱,累积滞回耗能仅为高墩试件的62.2%.研究表明,上锚式灌浆金属波纹管连接预制墩柱的抗震性能与现浇试件相近,具有较高的工程价值和实用意义.
Abstract：Aninnovativeprecastassembledpiercolumnwithanupper-anchoredgroutedmetalcorrugatedductsconnectionisastructuralconfigurationwherethegroutedcorrugatedductisembeddedinalocallyenlargedcross-sectionpierandconnectedtothebridgepilecap.Thisconstructionmethodoffersconvenienceandeconomicefficiency.Theseismicperformanceofprecastpierswiththeupper-anchoredgroutedcorrugatedmetalductsconnectionwasinvestigatedbyquasi-statictestsontwoprecastpiersofdifferentpierheightsandonecast-in-placeconcretespecimen.Thescaled-downratioforallthreespecimenswas1:2.5.Duringthetests,eachspecimenwassubjectedtoconstantaxialcompressionandhorizontalloadswereappliedwithdisplacementcontroluntilfailure.Thecrackdamagestateofthespecimenswasobserved,andtheseismicperformancewasanalyzedintermsofhysteresischaracteristics,skeletoncurves,ductility,energydissipationcapacityandresidualdeformation.Theresearchresultsindicatethatboththeupper-anchoredspecimensandthecast-in-placespecimensformeffectiveplastichinges;however,therearesignificantdifferencesintheformationpositionofplastichingesandthecharacteristicsofultimatefailure.Plastichingesareformedabovethesectionenlargementsegmentintheupper-anchoredspecimens,whilethecast-in-placespecimenformplastichingesatthebottomofthepier.Attheultimatefailurestage,themainreinforcementintheupper-anchoredspecimensdoesnotbreak,whereasthemainreinforcementinthecast-in-placespecimenexhibitspullout.Theyieldloadandultimateloadoftheupper-anchoredspecimensare123.8%and113.7%ofthoseofcast-in-placespecimen'svalues,respectively,indicatingaclosesimilarityinload-bearingcapacities.However,theductilityoftheupper-anchoredspecimensisweakerthanthatofthecast-in-placespecimen,withdisplacementductilityandcurvatureductilitybeing75.9%and92.3%ofthecast-in-placespecimen'svalues,respectively.Thepierheighthasasignificantinfluenceonthefailuremodeandcharacteristicsoftheupper-anchoredgroutedductsconnectionspecimens.Thelow-heightspecimenexhibitsmoreshearfailurecharacteristics,poorerductility,andacurvatureductilityofonly38%comparedtothehigh-heightspecimen.Thelow-heightspecimenalsohasweakerenergydissipationcapacity,withcumulativehysteresisenergydissipationbeingonly62.2%ofthatofthehigh-heightspecimen.Thestudydemonstratesthattheseismicperformanceofprecastpierwithupper-anchoredgroutedmetalcorrugatedductsconnectionissimilartocast-in-placepier,demonstratingsignificantpraticalvalueandengineeringsignificance.
作者：傅晨曦 周青 叶龙 沈殷 王懿 Author：FUChenxi ZHOUQing YELong SHENYin WANGYi
作者单位：华设设计集团股份有限公司,江苏南京210014南京公路事业发展中心,江苏南京210014同济大学土木工程学院,上海200092
刊名：铁道科学与工程学报 ISTICPKU
Journal：JournalofRailwayScienceandEngineering
年，卷(期)：2024, 21(6)
分类号：U443.22
关键词：桥梁工程 预制墩柱 灌浆金属波纹管 拟静力试验 抗震性能
Keywords：bridgeengineering precastpiers groutedcorrugatedmetalducts quasi-statictest seismicperformance
机标分类号：TU375U445.4TU473.1
在线出版日期：2024年7月16日
基金项目：国家自然科学基金上锚式灌浆波纹管连接预制墩柱拟静力试验研究[
期刊论文] 铁道科学与工程学报--2024, 21(6)傅晨曦 周青 叶龙 沈殷 王懿新型上锚式灌浆金属波纹管连接是将灌浆波纹管预埋于局部增大截面的墩柱中并连接桥梁承台的构造,既具有上锚式的施工便捷性,同时也有良好的经济性.为研究上锚式灌浆金属波纹管连接预制墩柱的抗震性能,进行2根不同墩高的...参考文献和引证文献
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关键词：桥梁工程,预制墩柱,灌浆金属波纹管,拟静力试验,抗震性能,
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