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1、外葉墻為非承重墻夾芯墻抗震性能探究摘要:對4片高度相同、高寬比和豎向壓應(yīng)力不同的夾芯墻進行了水平低周反復(fù)加載試驗,研究了這種墻體構(gòu)件的抗震性能?根據(jù)實際受力特點,試驗中水平荷載與豎向荷載都加載于試件內(nèi)葉墻的形心?觀測了該墻體受力變形損傷裂縫屈服破壞的全過程;分析了該墻體的破壞特征、滯回曲線、骨架曲線、位移延性、承載力、拉接筋受力性能和內(nèi)、外葉墻協(xié)同工作能力等?研究結(jié)果表明:由于拉接筋的作用,內(nèi)、外葉墻協(xié)同工作性能良好,外葉墻在試驗過程中破壞輕微;試驗過程中出現(xiàn)剪切滑移和“捏縮效應(yīng)”;內(nèi)葉墻在高寬比較小時,呈現(xiàn)明顯的剪切破壞,在高寬比較大時,呈現(xiàn)出彎剪
2、破壞;試件的承載力隨著軸壓比的提髙而增加.采用規(guī)范(GB50003-2001)中配筋砌體抗剪承載力平均值計算公式進行計算,結(jié)果較試驗值小.關(guān)鍵詞:低周反復(fù)加載試驗;砌體結(jié)構(gòu);夾芯墻;配筋砌體;抗震性能中圖分類號:TU365文獻標(biāo)識碼:ASeismicBehaviorofSandwichWallsSubjectedtoCyclicLoadingontheCenteroftheInteriorWallsHUANGLiangl?,YIChu?junl,2,WUZhi?weil,GA0Xiang3,CHENSheng?yun4(1CollegeofCivil
3、Engineering,HunanUniv,Changsha,Hunan410082,China;2.JizhunFangzhongArchitecturalDesignAssociates,Chengdu,Sichuan610017,China;3.ShenzhenChinaOverseasConstruetionLtd,Shenzhen518001,China;4.ShenzhenGemdaleCorp,Shenzhen518048,China)Abstract:Experimentalstudiesoffoursandwichwallswith
4、thesameheightbutdifferentheight?widthratioanddifferentverticalcompressivestress,whichweresubjectedtoin?planecyclicloading,werepresentedandtestsresuItswerediscussed.Basedonactualmechanicalcharacteristics,theverticalandhorizontalloadswereloadedonthecenteroftheinteriorwalls.Thewho
5、leprocessof1oading?deforming^damaging?cracking?yielding?failurewasobservedduringthetest.Thefailurecharacteristics,hystereticcurves,skeletoncurves,displacementduetility,bearingcapacity,behaviorofthetiebarandcoordinationbetweentwocavitywallswereanalyzed.Theresultshowedthattheinte
6、riorwallsandtheouterwallsworkedtogetherwell,andtheouterwallswereslightlydamaged;shearslippingandpinchingoccurredinthetest;shearfailureoccurredwhentheratioofheighttowidthwassmallandbending?shearfailureoccurredwhentheratioincreasedandtheultimatebearingcapacityofthewallsincreasedw
7、iththeincreaseoftheaxialcompressiveratio.TheshearcapacityofthewallsinthetestisgreatercomparedwiththeGB50003-2001Code.Keywords:cyclicloads;masonrystructure;sandwichwall;reinforcedmasonry;seismicperformance夾芯墻起源于北美、北歐等地區(qū).這些地區(qū)的建筑外墻由兩片墻體構(gòu)成,并在墻體之間設(shè)置保溫隔熱材料和拉接件,即為復(fù)合節(jié)能墻體,在我國叫空腔墻或者夾芯墻?這
8、種墻體可采用不同材料的墻片相結(jié)合,如內(nèi)、外葉墻都可采用混凝土砌塊、實心磚、空心磚等材料,根據(jù)需要可自由搭配形