水道港口2017，Vol.38Issue(3)：299-303,5.
初始剪应力对汶川震区饱和砂土动力特性影响分析
Experimental study on effects of initial shear stress on dynamic characteristics of saturated sand of Wenchuan earthquake area
黄思杰 1曹久亭2
作者信息
- 1. 交通运输部天津水运工程科学研究所,天津 300456
- 2. 天津水运工程勘察设计院 天津市水运工程测绘技术重点实验室,天津 300456
- 折叠
摘要
Abstract
Taking the saturated medium dense sand in Wenchuan earthquake area as the research object, the undrained dynamic triaxial tests were conducted on the sand with Kc=1.0, 1.5 and 2.0 using DDS-70 Dynamic Experiment System when the vibration frequency was 1 Hz. The effects of initial shear stress on the dynamic properties of the saturated medium dense sand in the Wenchuan earthquake area were analyzed. The results are as follows: the critical dynamic pore pressure of the saturated sand decreases with the increase of the initial shear stress. Under the same confining pressure and dynamic stress, it will need more vibration times for saturated sand to reach the turning point of the dynamic strain if the initial shear stress grows. The initial shear stress has a positive effect on the dynamic strength if the cyclic vibration times keep constant. The dynamic strength decreases with the increase of cyclic time, and this trend is more obvious when the initial shear strength is higher.关键词
汶川震区/饱和砂土/初始剪应力/动力特性Key words
Wenchuan earthquake area/saturated sand/initial shear stress/dynamic characteristics分类
建筑与水利引用本文复制引用
黄思杰,曹久亭..初始剪应力对汶川震区饱和砂土动力特性影响分析[J].水道港口,2017,38(3):299-303,5.
