不同检测方法对混凝土波速的影响研究
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摘要
为建立超声波法和低应变反射波法检测所得混凝土基桩波速的相互转换关系,本文给出了标准线性固体模型下粘弹性介质的三维和一维纵波速度之比及其实用简化公式,并且通过实验得出,混凝土构件的超声波速与1.054倍低应变动测波速之比处于1.03~1.12,具体数值会随着混凝土龄期、弹性模量和强度等级的增加而有所减小。
This paper is to establish a relationship between wave velocities of concrete pile shaft measured with the ultrasonic wave method and the low-strain reflected wave method.It proposes a simplified formula for the ratio of wave velocity in infinite medium to that in one dimensional bar The viscoelastic theory based on standard linear solid model is adopted in the formulation of the formula.Experimental results show that the ratio of the ultrasonic wave velocity to the 1.054 timed low-strain reflected wave velocity ranges from 1.03 to 1.12.The ratio decreases with increasing in the age,the Young's modulus and the strength of concrete.
This paper is to establish a relationship between wave velocities of concrete pile shaft measured with the ultrasonic wave method and the low-strain reflected wave method.It proposes a simplified formula for the ratio of wave velocity in infinite medium to that in one dimensional bar The viscoelastic theory based on standard linear solid model is adopted in the formulation of the formula.Experimental results show that the ratio of the ultrasonic wave velocity to the 1.054 timed low-strain reflected wave velocity ranges from 1.03 to 1.12.The ratio decreases with increasing in the age,the Young's modulus and the strength of concrete.
引文
[1]陈凡,徐天平,陈久照,等.基桩质量检测技术[M].北京:中国建筑工业出版社,2003.Chen fan,Xu Tianp ing,Chen Jiuzhao.Testing techn ique on con-crete p ile shaft quality.Beijing,Construction and Industry Press ofCh ina,2003.
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[3]尹加德.用超声波波速推定基桩平均波速的研究[J].振动、测试与诊断,2000,20(4):283~287.Y in Jiade.Stud ies on D eterm ination of averaged speed of stresswave in a foundation p ile.Journal of V ibration,M easurem ent&D iagnosis,2000,20(4):283~287.
[4]陈龙珠,沙玲,邓俊杰.混凝土波速受检测方法影响的研究[J].岩土工程学报,2006,28(6):114~119.Chen Longzhu,Sha ling,D eng Jun jie.Stud ies on wave velocities ofconcrete m easured w ith d ifferent test m ethods.Ch inese Journal ofGeotechn ical Engineering,2006,28(6):114~119.
[5]Christensen R M.Theory of viscoelasticity[M].New York:Aca-dem ic Press,1982.
[6]Mainard i F.W ave propagation in viscoelastic m ed ia.P itman Ad-vanced Pub lish ing Program,Boston London,1982,1~41.
[7]R izzo F J,Sh ippy D J.An application of the correspondence prin-ciple of linear viscoelasticity theory[J].SIAM J.on Appl.Math.,1971,(21):321~330.
[8]沙玲.混凝土纵波速度受测试方法影响的研究[D].上海交通大学硕士学位论文,2005.Sha ling.Stud ies on D ilatational-wave Velocities of ConcretesM easured w ith D ifferentM ethods.Master D egree Essay of Shang-hai Jiaotong Un iversity,2005.
[9]陈开圣,彭小平.地震波法在岩堆灌浆效果检测中的应用[J].工程地质学报,2005,13(4):530~532.Chen Kaisheng,Peng X iaop ing.Application of seism ic wave m eth-od in detecting grouting effects ofDap ing rock p ile.Journal of En-gineering Geology,2005,13(4):530~532.
[2]吴新璇.混凝土无损检测技术手册[M].北京:人民交通出版社,2004.W u X inxuan.Nondestructive testing techn ique on concrete.Bei-jing,People’s Commun ication Press,2004.
[3]尹加德.用超声波波速推定基桩平均波速的研究[J].振动、测试与诊断,2000,20(4):283~287.Y in Jiade.Stud ies on D eterm ination of averaged speed of stresswave in a foundation p ile.Journal of V ibration,M easurem ent&D iagnosis,2000,20(4):283~287.
[4]陈龙珠,沙玲,邓俊杰.混凝土波速受检测方法影响的研究[J].岩土工程学报,2006,28(6):114~119.Chen Longzhu,Sha ling,D eng Jun jie.Stud ies on wave velocities ofconcrete m easured w ith d ifferent test m ethods.Ch inese Journal ofGeotechn ical Engineering,2006,28(6):114~119.
[5]Christensen R M.Theory of viscoelasticity[M].New York:Aca-dem ic Press,1982.
[6]Mainard i F.W ave propagation in viscoelastic m ed ia.P itman Ad-vanced Pub lish ing Program,Boston London,1982,1~41.
[7]R izzo F J,Sh ippy D J.An application of the correspondence prin-ciple of linear viscoelasticity theory[J].SIAM J.on Appl.Math.,1971,(21):321~330.
[8]沙玲.混凝土纵波速度受测试方法影响的研究[D].上海交通大学硕士学位论文,2005.Sha ling.Stud ies on D ilatational-wave Velocities of ConcretesM easured w ith D ifferentM ethods.Master D egree Essay of Shang-hai Jiaotong Un iversity,2005.
[9]陈开圣,彭小平.地震波法在岩堆灌浆效果检测中的应用[J].工程地质学报,2005,13(4):530~532.Chen Kaisheng,Peng X iaop ing.Application of seism ic wave m eth-od in detecting grouting effects ofDap ing rock p ile.Journal of En-gineering Geology,2005,13(4):530~532.
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