摘要
由于土动力参数的不同,土动力计算分析的结果将有一定差异,为更合理的取得地基基础上部结构相互作用体系动力特性研究的野外大比例模型试验的场地土的动力特性,在100kPa,200kPa,300kPa3种固结压力下,分别进行了原状土样的循环单剪试验、扰动土样的动三轴试验,得到了2种试验在3种固结压力下的最大动剪模量Gdmax和G/Gdmax γ曲线,并进行了对比分析.结果表明,循环单剪试验得到的原状土的Gdmax比相同固结压力下的扰动土的动三轴试验值稍低;100kPa和200kPa固结压力下原状土的循环单剪试验得到的动剪模量比G/Gdmax大于相应的扰动土的动三轴试验值,而300kPa固结压力下原状土的循环单剪试验得到的G/Gdmax却小于相应的扰动土的动三轴试验值.
<Abstrcat>The results of soil dynamic analysis are different because of the difference of soil dynamic parameters. To get reliable soil dynamic characters of large-scale model tests of dynamic soil-foundation-structure interaction system, cyclic simple shear tests of undisturbed samples and dynamic triaxial tests of compact specimens were performed under 100 kPa,200 kPa and 300 kPa consolidation pressures, and the maximal dynamic shear modulus G_(dmax) and the curves of G/G_(dmax)-γ were obtained and analyzed comparatively. Results showed that the maximal dynamic shear modulus G_(dmax) obtained from cyclic simple shear tests was less than that from dynamic triaxial tests;and the dynamic shear modulus ratio G/G_(dmax) obtained from cyclic simple shear tests was more than that from dynamic triaxial tests under 100 kPa and 200 kPa consolidation pressures, but the G/G_(dmax) obtained from cyclic simple shear tests was less than that from dynamic triaxial tests under 300 kPa consolidation pressure.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第3期33-37,共5页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50278033)
关键词
动剪模量
循环单剪
动三轴
试验研究
dynamic shear modulus
cyclic simple shear
dynamic triaxial tests
laboratory experiments
