摘要
通过对杭州饱和砂土进行不排水循环三轴试验,采用扰动状态概念的理论,分析了循环应力比、相对密度和颗粒特征对砂土动力特性的影响。试验结果表明:随着循环应力比的增加,相同循环次数下的扰动状态函数值逐渐增大;随着相对密度的增加,相同循环次数下的扰动状态函数值逐渐减小;细砂相对于中砂,其扰动状态函数值随循环次数的增加首先到达临界值Dc。同时,在试验的基础上建立了反映土体扰动状态的经验公式。
12 undrained cyclic triaxial tests have been performed on tests HangZhou saturated sand, and factors such as cyclic stress ratio, relative density and particle characteristics have been analyzed on dynamic properties of sand by using the theory of disturbed state concept. The results show that, with the increase of cyclic stress ratio, the disturbed state function value under the same cycle gradually increa-ses. with the increase of relative density, the disturbed state function value under the same cycle gradually reduces. Compared with medium sand, the disturbed state function of the fine sand can reach the critical value earlier. This relationship has been synthesized in the form of an empirical equation.
出处
《低温建筑技术》
2010年第6期97-99,共3页
Low Temperature Architecture Technology
