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时间:2020-03-26
《黄河冰单轴压缩强度的试验与影响因素探究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、水利水电技术第47卷2016年第9期黄河冰单轴压缩强度的试验与影响因素探究王庆凯1,张宝森2,邓宇2,李志军1(1.大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024;2.黄河水利科学研究院,河南郑州450000)摘要:为进行黄河冰单轴压缩强度的试验,在黄河头道拐水文站附近取冰坯,加工成单轴压缩试验冰样,在实验室测试了其单轴压缩强度。试验温度分别为一3℃、一5℃、一7℃、一10℃、一15℃,应变速率范围10。7S~~10也S-。。试样按加载方向分为垂直冰面方向和平行冰面方向,分别测试75个和2
2、12个。试验得到250组有效数据,分析结果验证了单轴压缩强度的应变速率效应,建立了单轴压缩强度随应变速率变化的拟合公式;给出不同力学行为下的单轴压缩强度与温度和应变速率的统计关系,进而得到了宽应变速率范围下单轴压缩强度随温度变化的统计关系曲面。此外,试验还推断出河流流向与黄河冰单轴压缩强度之间不存在相关关系,垂直冰面方向加载试样的峰值强度比平行冰面方向加载试样的峰值强度高。关键词:黄河冰;单轴压缩强度;温度;应变速率doi:10.13928/j.cnld.wrahe.2016.09.018中图分类号:TV
3、311文献标识码:A文章编号:1000.0860(2016)09.0090.05StudyontestofuniaxialcompressivestrengthoficeinYellowRiveranditsinfluencingfactorsWANGQingkail,ZHANGBaosen2,DENGYu2,LIZhijunl(1.StateKeyLaboratoryofCoastalandOffshoreEngineering,DalianUniversityofTechnology,Dalian11
4、6024,Liaoning,China;2.YeHowRiverInstituteofHydraulicResearch,Zhengzhou450000,Henan,China)圜Abstract:InordertonlakeauniaxialcompressivestrengthtestontheiceintheYeUowRiver,theiceblockforthetestistakennearToudaoguaiHydrologicalStationofthefiver,andthentheicei
5、sprocessedintotheice-samplesfortheuniaxialcompressivetest,ofwhichtheuniaxialcompressivestrengthsaretestedinlab.Forthetest,thetestingtemperaturesa弛一3℃,一5oC,一7℃,一lO℃,一15℃respectivelyandthestrainraterangeis10—7S一1~10—28—1.Fortheloadingdirection,theice—sanl·p
6、les眦dividedintothesampleswiththeloadingdirectionverticaltotheicesurfaceandthesampleswiththeloadingdirectionhorizontaltotheicesurface,fromwhich75samplesand212samplesa弛respectivelytested.Fromthetest,250groupsofeffee·tivedataareobtained,furthermore,theanalys
7、isresultverifiesthestrainrateeffectoftheuniaxialcompressivestrength,andthenthefittingformulaforthevariationoftheuniaxialcompressivestrengthalongwiththestrainrateisestablished;fromwhichthestatisticalrelationshipbetweentheuniaxialcompressivestrengthandtempe
8、ratureandthestrainrateundervariousmechanicalbehaviorsisgivenout,thusthecurvedplaneforthestatisticalrelationshipofthevariationoftheuniaxialcompressivestrengtha-longwithtemperatureinawiderangeofstrainrateisobtainedasw
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