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1、第31卷第3期地震工程与工程振动Vo.l31No.32011年6月JOURNALOFEARTHQUAKEENGINEERINGANDENGINEERINGVIBRATIONJun.2011文章编号:1000-1301(2011)03-0127-07小剪跨比格构式混凝土墙体抗震性能试验122222周静海,王鹏里,孟宪宏,朱静雯,侯延泽,张志伟(1.沈阳建筑大学节能研究院,辽宁沈阳110168;2.沈阳建筑大学土木工程学院,辽宁沈阳110168)摘要:文章旨在研究不同剪跨比的格构式混凝土墙体抗震性能。将生产车间预制成EPS保温模块拼接成墙体模板,在横向和纵向孔洞中分
2、别布置钢筋,然后在孔内浇筑自密实混凝土,形成/EPS新型节能0格构式混凝土墙体,然后对6个参数不同的试件进行低周反复水平荷载作用的试验。结果,墙体破坏形态为:首先墙体相邻格构柱间的连梁出现环状裂缝和/X0型裂缝,裂缝处混凝土逐渐被压碎,随后墙体格构柱混凝土出现斜向裂缝,逐渐贯通,最终试件破坏。试验证明,格构式混凝土墙的受剪承载力可按现行规范剪力墙的受剪承载力公式(扣除孔洞的截面面积)计算;墙体延性系数在2~4之间,极限位移角较大;随着剪跨比的增大,加强边柱对承载力的提高效果减弱,墙体的侧向刚度和极限承载力下降,但塑性变形能力增强。关键词:剪跨比;混凝土墙;延性;
3、抗震性能中图分类号:TU375文献标志码:AExperimentalstudyonseismicbehaviorofconcretegrillagewallswithdifferentshearspanratio122222ZHOUJinghai,WANGPengli,MENGXianhong,ZHUJingwen,HOUYanze,ZHANGZhiwei(1.EnergyResearchInstitute,ShenyangJianzhuUniversity,Shenyang110168,China;2.DepatmentofCivilEngineering,S
4、henyangJianzhuUniversity,Shenyang110168,China)Abstract:Intheresearchoftheseismicbehaviorofconcretegrillagewallswithdifferentshearspanratios.wecom-posedthewallwiththeEPSmodule,whichwasprefabricatedinfactory,andthenprovidedthereinforcementinver-ticalandhorizontalholerespectively,poured
5、thesel-fcompactingconcreteintheholes,soformedtheEPSconcretegrillagewal.lSixconcretegrillagewallswithdifferentshearspanratiosweretestedunderverticalloadandcycliclateralload.Theendwallofthecentralcrossbeamwascrackedandthe/X0-typecracksappearedinmostofthecoreregionandfinallythewaltwascr
6、ushedandfailed.Theshearstrengthoftheconcretegrillagewallscanbeca-lculatedbythecurrentcodeformulaforreinforcedconcreteshearwal.lThedisplacementductilityratiowasbetween2~4,theultimatedisplacementanglewaslarge;Increasingwithshearspanratios,theeffectofimprovingbearingcapacitybyreinforcin
7、gsidecolumnswillbeweakened,lateralrigidityandultimatebearingcapacityofthewallslos,tbuttheabilityofplasticdeformationcanbeimproved.Keywords:shearspanratio;concretewalls;ductility;seismicbehavior引言20世纪70年代,格构式混凝土结构由奥地利人开发,又称为纳士塔/Rastra0结构,而后在欧美等国家被收稿日期:2010-11-15;修订日期:2011-05-10基金项目:国家
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