轻质泡沫混凝土shpb试验与分析

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1、Seediscussions,stats,andauthorprofilesforthispublicationat:https://www.researchgate.net/publication/286042596SHPBtestsforlightweightfoamconcreteArticleinZhendongyuChongji/JournalofVibrationandShock·September2014DOI:10.13465/j.cnki.jvs.2014.17.021CITATIONSREADS8433

2、authors,including:YuanPuAnhuiUniversityofScienceandTechnology19PUBLICATIONS45CITATIONSSEEPROFILEAllcontentfollowingthispagewasuploadedbyYuanPuon13April2016.Theuserhasrequestedenhancementofthedownloadedfile.振动与冲击第33卷第17期JOUＲNALOFVIBＲATIONANDSHOCKVol．33No．172014

3、轻质泡沫混凝土SHPB试验与分析袁璞，马芹永，张海东(安徽理工大学矿山地下工程教育部工程研究中心，安徽淮南232001)摘要:为研究轻质泡沫混凝土的冲击动力学性能，结合半导体应变测试技术和入射脉冲整形技术对铝质分离式Hopkinson压杆(SHPB)装置进行改进，解决了泡沫混凝土类低阻抗多孔介质材料透射信号难采集问题，满足了加载过程3中试件内部应力均匀性要求。通过调整冲击气压对密度为220kg/m轻质泡沫混凝土实施了不同撞击杆速度下

4、的单轴冲击压缩试验。试验结果表明，泡沫混凝土试件在冲击荷载作用下依次经历线弹性阶段、屈服阶段和孔壁破坏3个阶段，且泡沫混凝土试件平均应变率与撞击杆速度表现出较强的线性相关性。关键词:泡沫混凝土;分离式Hopkinson压杆(SHPB);半导体应变片;入射脉冲整形中图分类号:O347．3文献标志码:ADOI:10．13465/j．cnki．jvs．2014．17．021SHPBtestsforlightweightfoamconcreteYUANPu，MAQin-yong，ZHANGHai-dong(MOEＲesearchC

5、enterofMineUndergroundEngineering，AnhuiUniversityofScienceandTechnology，Huainan232001，China)Abstract:Inordertoinvestigatetheimpactdynamicpropertiesoflight-weightfoamconcrete，semiconductorstraintesttechnologyandincidentpulseshapingtechniquewereadoptedtomakeanalumin

6、iumsplitHopkinsonpressurebar(SHPB)apparatussuitableforlowimpedanceporousmaterials．Then，theproblembeingdifficultincollectingtransmittedsignalswassolvedwiththesemiconductorstraintesttechnologyandtheinternalstressuniformityrequirementsinloadingprocessweremetwiththein

7、cidentpulseshapingtechnique．Uniaxialimpactcompressiontestsatvariousstrikervelocitieswereconductedbyadjustingthepressureofcompressedairforlight-weightfoamconcretewithmassdensityof3220kg/m．Thetestresultsshowedthatunderimpactloads，thefoamconcretespecimensgothrough3st

8、agesincludinglinearelasticstage，yieldstageandporecompactionstage;moreover，thereisastrongerlinearcorrelationbetweentheaveragestrainrateoffoamconcretespec