摘要
针对常规土类试验和刚性试件试验,建立了固定-自由式共振柱试验机的动剪切模量误差、应变误差和阻尼比误差计算公式,得到了几种主要影响因素和其对试验误差影响程度的定量认识.分析发现:试件动剪切模量相对误差与测试频率本身标准值无关;试件类型的不同对动剪切模量相对误差的影响可忽略不计;对于常规试验,频率的相对误差和高度的相对误差对动剪切模量相对误差影响较大,同比条件下是其他参数的两倍;对于刚性试验,频率的相对误差和修正值的相对误差对动剪切模量相对误差影响较大;应变相对误差与试件类型无关,测试频率相对误差的影响较其他参数的影响大两倍;阻尼比相对误差是个很敏感的参数,对于常规试验小应变时误差较难控制,对于刚性试验误差控制难度更大.
The error equations of dynamic shear modulus, strain and damping ratio for the routine soil tests and rigid sample tests by the fixed -free resonant column device are obtained by the root mean square method and the affecting factors and affecting degree of errors are analyzed. Then the error analysis based on a new resonant column device is successfully investigated according to the error equations. The results indicate that dynamic shear modulus relative error is independent of frequency and sample types. For routine tests the effects of frequency relative error and height relative error on dynamic shear modulus relative error are remarkable and their affecting degree are twice as other affecting factors. For rigid sample tests the effects of frequen- cy relative error and revised coefficient relative error are remarkable. The strain relative error is independent of sample types. The effect of frequency tors. The damping ratio relative error to control and for rigid sample tests, relative error on the strain relative error is twice than other affecting factors.The damping ratio relative error is a sensitive parameter. The error for soil tests in small strain is difficult the damping ratio relative error is quite difficult to control.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第4期510-513,共4页
Journal of Harbin Institute of Technology
基金
地震科学联合基金资助项目(102033)
黑龙江省教育厅科学技术研究资助项目(11511296)
