振动三轴试验误差的分析及校正
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摘要
振动三轴仪是室内土工试验中研究土体动力特性的重要仪器,但从以往的试验结果来看具有一定的离散性。这除了试验操作的人为误差外,振动三轴仪系统本身也会带来一定的误差,如双向动荷载的相位差不能达到预定值,系统本身的阻尼力,及试验数据的滞后性等等。为提高振动三轴试验的精确度,有必要对振动三轴试验的误差进行分析,找到误差的来源并进行相应的校正。
The dynamic triaxial apparatus is the more important and popular testing apparatus in researching the soil’s dynamic properties.But the testing results are separate in some measure,which were caused by man made and the apparatus itself.For example,the phasic value of the bidirectional loads isn’t the value given in advance,which will lead to some error.So are the resistance and the hysteresis quality of the testing data from the apparatus.In order to enhance the exactness of the testing result,it is very essential to analyze the cause of error and to present some proposals about its mending.
The dynamic triaxial apparatus is the more important and popular testing apparatus in researching the soil’s dynamic properties.But the testing results are separate in some measure,which were caused by man made and the apparatus itself.For example,the phasic value of the bidirectional loads isn’t the value given in advance,which will lead to some error.So are the resistance and the hysteresis quality of the testing data from the apparatus.In order to enhance the exactness of the testing result,it is very essential to analyze the cause of error and to present some proposals about its mending.
引文
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[5]刘雪珠,陈国兴.黏粒含量对南京粉细砂液化影响的试验研究[J].地震工程与工程振动,2003,23(3):150-155.LIU Xue-zhu,CHEN Guo-xing.Experimental study on influence of clay particle content on liquefaction of Nanjing fine sand[J].Earthquake Engineering and Engineering Vibration,2003,23(3):150-155.
[6]杨少丽,Rolf Sandven,林霖,等.改进的室内粉土制样技术[J].岩土工程学报,2000,22(3):379-380.YANG Shao-li,Rolf Sandven,LIN Lin,et al.Improved preparing technique of silt sample[J].Chinese Journal of Geotechnical Engineering,2000,22(3):379-380.
[7]周加林.双向动三轴实验误差的分析与校正[J].大坝观测与土工测试,1995,19(6):37-40.ZHOU Jia-lin.Analysis and rectification of the error of the two-way dynamic triaxial test[J].Dam Observation and Geotechnical Tests,1995,19(6):37-40.
[8]张建民,段云秦.振动三轴试验中仪器系统阻尼力的水试样校正法[J].岩土工程学报,1989,11(1):79-84.ZHANG Jian-min,DUAN Yun-qin.Correction method of the water sample to the apparatus’resistance in the dynamic triaxial test[J].Chinese Journal of Geotechnical Engineering,1989,11(1):79-84.
[2]栾茂田,郭莹,李木国,等.土工静力-动力液压三轴-扭转多功能剪切仪研发及应用[J].大连理工大学学报,2003,43(5):670-675.LUAN Mao-tian,GUO Ying,LI Mu-guo,et al.Development and application of soil static and dynamic universal triaxial and torsional shear apparatus[J].Journal of Dalian University of Technology,2003,43(5):670-675.
[3]郭莹,栾茂田,何杨,等.主应力方向循环变化对饱和松砂不排水动力特性的影响[J].岩土工程学报,2005,27(4):403-409.GUO Ying,LUAN Mao-tian,HE Yang,et al.Effect of variation of principal stress orientation during cyclic loading on undrained dynamic behavior of saturated loose sands[J].Chinese Journal of Geotechnical Engineering,2005,27(4):403-409.
[4]安徽水利科学研究所.标准砂振动液化第一次对比试验成果汇总[R].合肥,1981.
[5]刘雪珠,陈国兴.黏粒含量对南京粉细砂液化影响的试验研究[J].地震工程与工程振动,2003,23(3):150-155.LIU Xue-zhu,CHEN Guo-xing.Experimental study on influence of clay particle content on liquefaction of Nanjing fine sand[J].Earthquake Engineering and Engineering Vibration,2003,23(3):150-155.
[6]杨少丽,Rolf Sandven,林霖,等.改进的室内粉土制样技术[J].岩土工程学报,2000,22(3):379-380.YANG Shao-li,Rolf Sandven,LIN Lin,et al.Improved preparing technique of silt sample[J].Chinese Journal of Geotechnical Engineering,2000,22(3):379-380.
[7]周加林.双向动三轴实验误差的分析与校正[J].大坝观测与土工测试,1995,19(6):37-40.ZHOU Jia-lin.Analysis and rectification of the error of the two-way dynamic triaxial test[J].Dam Observation and Geotechnical Tests,1995,19(6):37-40.
[8]张建民,段云秦.振动三轴试验中仪器系统阻尼力的水试样校正法[J].岩土工程学报,1989,11(1):79-84.ZHANG Jian-min,DUAN Yun-qin.Correction method of the water sample to the apparatus’resistance in the dynamic triaxial test[J].Chinese Journal of Geotechnical Engineering,1989,11(1):79-84.
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