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1、第44卷第1期建筑結(jié)構(gòu)Vol.44No.12014年1月上BuildingStructureJan.2014鋼板栓筋連接高強(qiáng)箍筋約束混凝土柱的*抗震性能試驗(yàn)研究1121李青寧,張振成,于慶榮,姜維山(1西安建筑科技大學(xué)土木工程學(xué)院,西安710055;2天津大學(xué)建筑工程學(xué)院,天津300072)[摘要]提出裝配框架柱的一種新型連接型式———鋼板栓筋連接型式。采用足尺模型,設(shè)計(jì)了2個(gè)鋼板栓筋連接高強(qiáng)箍筋約束混凝土柱和2個(gè)對(duì)比現(xiàn)澆普通箍筋柱。通過(guò)擬靜力低周反復(fù)加載試驗(yàn),并與現(xiàn)澆普通箍筋柱對(duì)比,研究鋼板栓筋連接高強(qiáng)箍筋約束混凝土柱的承載能力和抗震性能。觀測(cè)了4個(gè)試件受力→變形→損傷→裂縫→屈服的全過(guò)
2、程,并分析各試件的破壞特征、滯回曲線、骨架曲線、剛度衰減、位移延性、耗能能力等。試驗(yàn)表明:在相同條件下,鋼板栓筋連接高強(qiáng)箍筋約束混凝土柱具有與現(xiàn)澆普通箍筋柱相當(dāng)?shù)某休d力,其抗震性能良好;連接處采用焊接及水平栓筋的鋼板栓筋連接高強(qiáng)箍筋約束混凝土柱是可靠的。[關(guān)鍵詞]高強(qiáng)螺旋箍筋;約束混凝土;裝配式柱;水平栓筋;抗震性能中圖分類(lèi)號(hào):TU756.4+1文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-848X(2014)01-0042-07Experimentalresearchonseismicperformanceofthefabricatedconfinedconcretecolumnswithsteel
3、plateandhorizontalstrengthenedbars1121LiQingning,ZhangZhencheng,YuQingrong,JiangWeishan(1SchoolofCivilEngineering,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China;2ArchitecturalandCivilEngineeringInstitute,TianjinUniversity,Tianjin300072,China)Abstract:Anewconnectiontypeofframefabricat
4、edcolumnswithsteelplateandhorizontalstrengthenedbarswasproposed.Byusingofthecomparablefullscalemodeltestmethod,twonewconfinedconcretecolumnswithsteelplateandhorizontalstrengthenedbarsandtwocast-in-sitecolumnswithplainstirrupsweredesignedandconstructed.Throughthepseudo-statictest,thecarryingcapacit
5、yandseismicperformanceofthefabricatedconfinedconcretecolumnwithsteelplateandhorizontalstrengthenedbarwerestudiedandcomparedwiththecast-in-sitecolumnswithplainstirrups.Thewholeprocessofdeforming→damaging→cracking→yielding→failurewasobservedduringthetest.Damagecharacteristics,hystereticcurves,skelet
6、oncurves,stiffnessdegradation,displacementductilityandenergydissipationcapacityofthefourcolumnswerediscussed.Thetestresultsshowthatunderthesamecondition,bearingcapacityofthenewfabricatedconfinedconcretecolumnswithsteelplateandhorizontalstrengthenedbarisequaltothecast-in-sitecolumnswithplainstirrup
7、s,anditalsohasgoodseismicperformance.Junctionofthenewfabricatedconfinedconcretecolumnswithsteelplateandhorizontalstrengthenedbarusedweldingandhorizontalbarasitsattendedmodeisreliable.Keywords:high-strengthspirals