Abstract:Theconceptofconfinedconcret

Abstract:Theconceptofconfinedconcretehasbeenwidelyacceptedthroughoutthestructuralengineeringfield,suchasthespiral,steel
tube, or carbon fiber composite shell confined concrete, etc. In the present study, this concept has not only been used in the structural
columns, but also in joints. In this connection system, the steel tube is interrupted at the floor, the concrete in the connection zone is
confinedbyastiffeningringwithmultiplelateralhoops,andthereinforcedconcretebeamsarecontinuouslyarrangedthroughthejoint.
The structural behavior of this new connection system in axial compression tests and reversed cyclic loading tests is presented in a
companionpaper.Inthepresentstudy,thebearingstrengthofcompositecolumnsandthejointinaxialcompressionisobtainedbasedon
thestressandstrainanalyses.Thecriticalvolumefractionoftransversestirrupsofthecompositecolumnandtheeffectiveconfiningradius
inthestiffeningringareproposedbasedonthethickcylindermodelwiththeassumptionofplanestressstate.Byusingthesesolutions,
itisfavorabletoobtainthestressdistributioninconfiningconcreteandthebearingstrengthoftheconfinedconcrete.Forthereversed
cyclicloadingtests,theCloughhysteresismodelisusedtosimulatethehysteresisloopsofthespecimenswithoutconsideringthestiffness
degradation in the unloading process. The results of the theoretical modeling are generally in good agreement with the experimental
observations.

結果 (中文) 1:

摘要： Theconceptofconfinedconcretehasbeenwidelyacceptedthroughoutthestructuralengineeringfield、 suchasthespiral、 钢
管、 或碳 fiber 复合壳 confined 混凝土等。在本研究中，这一概念已不仅被用于结构
列，但也在接头。在这个连接系统，钢管被中断在 floor，在连接区混凝土是
confinedbyastiffeningringwithmultiplelateralhoops，
轴向压缩测试和反循环加载测试这个新连接系统的结构行为提出在
companionpaper。 andthereinforcedconcretebeamsarecontinuouslyarrangedthroughthejoint。Inthepresentstudy，thebearingstrengthofcompositecolumnsandthejointinaxialcompressionisobtainedbasedon
thestressandstrainanalyses。Thecriticalvolumefractionoftransversestirrupsofthecompositecolumnandtheeffectiveconfiningradius
inthestiffeningringareproposedbasedonthethickcylindermodelwiththeassumptionofplanestressstate。Byusingthesesolutions，
itisfavorabletoobtainthestressdistributioninconfiningconcreteandthebearingstrengthoftheconfinedconcrete。Forthereversed
cyclicloadingtests，theCloughhysteresismodelisusedtosimulatethehysteresisloopsofthespecimenswithoutconsideringthestiffness
在卸货过程中的降解。理论建模的结果大致是在好的协议与实验
意见.

結果 (中文) 2:

或碳纤维复合材料的外壳约束混凝土等。在本研究中，这个概念不仅被用在结构
柱，而且在关节。在这方面，系统，钢管是在地板中断，在该连接区域中的混凝土 这个新的连接系统在轴向压缩试验和反复荷载试验结构行为呈现 在卸载过程。理论模型的结果通常是与实验吻合较好的观测。

結果 (中文) 3:

摘要：theconceptofconfinedconcretehasbeenwidelyacceptedthroughoutthestructuralengineeringfiELD，suchasthespiral，钢
管，或碳fiBER复合壳CONfi内德混凝土，等。在本研究中，这个概念不仅被用来构造
列，而且在关节。在这个系统连接，钢管是在fl可怜的中断，在连接区的混凝土
反对finedbyastiffeningringwithmultiplelateralhoops，andthereinforcedconcretebeamsarecontinuouslyarrangedthroughthejoint
轴向压缩试验。在这个新的连接系统的结构性能和反复荷载试验是在一个
companionpaper inthepresentstudy，thebearingstrengthofcompositecolumnsandthejointinaxialcompressionisobtainedbasedon
thestressandstrainanalyses提出。thecriticalvolumefractionoftransversestirrupsofthecompositecolumnandtheeffectiveconfiningradius
inthestiffeningringareproposedbasedonthethickcylindermodelwiththeassumptionofplanestressstate。byusingthesesolutions，
itisfavorabletoobtainthestressdistributioninconfiningconcreteandthebearingstrengthoftheconfinedconcrete forthereversed
cyclicloadingtests，在卸荷过程中thecloughhysteresismodelisusedtosimulatethehysteresisloopsofthespecimenswithoutconsideringthestiffness
降解。理论模型计算的结果一般都与实验
观测的好协议。