摘要
为更好地模拟多向应力和主应力轴旋转等复杂应力路径,与英国GDS公司合作研发了能施加轴向和扭矩动载的空心圆柱仪。文中介绍了该仪器的工作原理和性能,分析对比了其与传统单向动三轴仪试验结果,并探讨该空心圆柱仪所完成的5组典型动力荷载及一组不规则随机波动力试验能力。动力加荷时,通过调整设定刚度参数,实测波形与设定波形误差较小。该仪器能很好地模拟地震、波浪和交通荷载引起的应力,为研究复杂应力状态下土体动力本构关系提供了很好的工具。
To simulate the complicated stress path, such as multi-directional stress and principal stress axis rotation induced by earthquake shaking, ocean wave or traffic loading, a hollow cylinder apparatus （HCA） with dynamic triaxial and torsional shear capability was designed cooperatively with GDS company. The working principle of the apparatus is introduced. Comparisons of the test results are made between the traditional dynamic triaxial device and the hollow cyclinder apparatus. Five series dynamic stress paths and a seismic record are designed and applied to evaluate the performing of the new apparatus. The deviation from the specified loading stress would be minimized as a sutiable parameter, which could be adjusted in the software, is chosen. The testing results show that the HCA is a good instrument to investigate dynamic constitutive model under complex stress conditions.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第1期314-320,共7页
Rock and Soil Mechanics
基金
地震行业科研专项基金(No.200808022)
国家自然科学基金(No.50708095)
国家重点基础研究发展计划(No.2007CB714203)资助
关键词
动力试验
空心圆柱扭剪仪
动应力路径
dynamic soil tests
hollow cylinder apparatus
dynamic stress path
