四川建筑科学研究
74
SichuanBuildingScience
第40卷第2期2014年4月
钢筋混凝土框架柱增设剪力墙加固抗震性能分析
田
苋1,时旭东2…,张天申2…,王元清2…,张延年1,杨
(1.沈阳建筑大学土木工程学院,辽宁沈阳110168;
光1
2.清华大学土木工程安全与耐久教育部重点实验室,北京100084;3.清华大学结构工程检测中心,北京100084)
摘要:为了研究轴压比、剪力墙厚度及长度对增设剪力墙加固的钢筋混凝土框架柱在单调荷载作用下抗震性能的影响,在考虑加固柱的二次受力特性的前提下,采用数值模拟的方法分析加固柱的P一△曲线和刚度退化曲线。结果表明:随着轴压比的增大,加固柱抗侧承载力增加,刚度、延性降低;剪力墙厚度及长度的增大使加固柱的承载力得到了提高,但高轴压比下,通过增加剪力墙厚度及长度加固钢筋混凝土框架柱会使加固后柱的延性降低,刚度退化程度加大。
关键词:加固;增设剪力墙;有限元分析;P—A曲线;刚度退化中图分类号:TU375
文献标志码:A
文章编号:1008—1933(2014)02—074—05
SeismicbehavioranalysisofRCframecolumnsreinforcedby
additionalRCshearwall
TIANPen91,SHIXudon92…,ZHANG
Tianshen2…,WANG
Yuanqin92…,
ZHANGYannianl.YANGGuan91
(1.College
ofCivilEngineering,ShenyangJianzhuUniversity,Shenyang
110168,China;
2.KeyLaboratoryofCivilEngineeringSafetyandDurabilityofChinaEducationMinistry,
TsinghuaUniversity,Beijing
3.DetectingCenterofStructure
100084,China;
EngineeringofTsinghuaUniversity,Beijing100084,China)
on
Abstract:Inordertoanalyzetheinfluenceofaxialcompressionratio,thicknessofshearwallandlengthofadditionalshearwall
the
seismicbehaviorofreinforcedRCframecolumnsstrengtheningbyadditionalshearwall,whichthecolumnswereundermonotonousload.Based
on
thepremiseofconsideringthesecondarymechanicalcharacteristicsofreinforcedcolumns,the
methodofnumerical
simulationWasadoptedtodoanalysis
ofP一△curveofreinforcedcolumnsand
curve
ofstiffnessdegradation.Theresultsindicatedtllat
theload-carryingcapacityofreinforcedcolumnsincreasedwiththeincreaseofaxialcompressionratio,whilestiffnessandductility
decreased.Thebearingcapacityofreinforcedcolumns
strengtheningRC
were
alsoimprovedwiththeincreaseofthicknessandlengthofshearwall,but
frame
columnsbyincreasingthethicknessandlengthofshearwallunderhighaxialcompressionratioreducedthe
ductilityofthespecimen
and
degreeofstiffnessdegradationincreased.
Keywords:strengthen;addshearwall;finiteelementanalysis;P一△CHIVe;ductilitydecrease
U
刖
应采用单跨框架结构。这样大多数既有钢筋混凝土
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