Analysis of Dynamic Stress Path under Obliquely Incident SV-waves and its Influencing Factors
HUANG Bo 1,2 LI Qi-qun 1,2,3 LING Dao-sheng 1,2 WANG Ning1,2
1. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China
Dynamic stress path is the key issue for site seismic response in foundation. Based on wave theory, dynamic stress generated in semi-infinite elastic space under obliquely incident SV-waves is derived. The method is in accordance with the conventional method to estimate seismic stress in soil dynamics when incident angle is zero with greater shear stiffness. The characteristics of dynamic stress path under obliquely incident SV-waves are revealed. The stress path proves mathematically an oblique ellipse in the plane consisting of two shear stress components (normal stress difference and horizontal shear stress). Sensitivity analysis of parameters is taken, which points out that incident angle, Poisson’s ratio, and depth corresponding to unit wave length are the fundamental factors affecting stress path, and lies a theoretical foundation for further study on site dynamic response under obliquely incident seismic waves.
黄 博 1,2,李琪群 1,2,3,凌道盛 1,2,王 宇 1,2. SV波斜入射形成的动应力路径及影响因素分析[J]. 振动与冲击, 2018, 37(2): 6-16.
HUANG Bo 1,2 LI Qi-qun 1,2,3 LING Dao-sheng 1,2 WANG Ning1,2. Analysis of Dynamic Stress Path under Obliquely Incident SV-waves and its Influencing Factors. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 6-16.
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