一种土的阻尼比近似计算方法
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摘要
提出了一种用多边形逼近滞回曲线计算土的阻尼比的方法,该方法可直接利用试验数据进行计算,算法可重复利用,使得阻尼比的计算工作得以简化。将其与传统的椭圆拟合方法计算结果进行了对比,由于实测的滞回圈不是标准的椭圆,两者的计算结果存在一定的差异。
By replacing the dynamic stress-strain hysteresis loop with polygon,a simple method of determining the damping ratio of soils approximately is proposed. The method can use test results directly,and by using this method,the process of detemining damping ratio will be simplified. Then the results determined by this method and the traditional ellipse pseudo method are compared,differences are found between them because the actual hysteresis loop recorded in dynamic triaxial tests are not standard ellipse.
By replacing the dynamic stress-strain hysteresis loop with polygon,a simple method of determining the damping ratio of soils approximately is proposed. The method can use test results directly,and by using this method,the process of detemining damping ratio will be simplified. Then the results determined by this method and the traditional ellipse pseudo method are compared,differences are found between them because the actual hysteresis loop recorded in dynamic triaxial tests are not standard ellipse.
引文
[1]张克绪.土动力学[M].北京:地震出版社,1988.
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[3]关正美,石伟强.动三轴试验研究土的动剪切模量和阻尼比[J].山西建筑,2005,31(29):91—92.GUAN Zhengmei,SHI Weiqiang.Dynamic triaxial test on dynamic shear modulus and damping ratio[J].Shanxi Architecture,2005,31(29):91—92.
[4]魏茂杰,林木春.一种确定土的等效阻尼比的新方法[J].水利水电技术,1993,(8):50—53.
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[3]关正美,石伟强.动三轴试验研究土的动剪切模量和阻尼比[J].山西建筑,2005,31(29):91—92.GUAN Zhengmei,SHI Weiqiang.Dynamic triaxial test on dynamic shear modulus and damping ratio[J].Shanxi Architecture,2005,31(29):91—92.
[4]魏茂杰,林木春.一种确定土的等效阻尼比的新方法[J].水利水电技术,1993,(8):50—53.
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