摘要
瑞利波频谱分析法是一种能有效的测试地基参数的方法,但测试深度较浅。交通荷载产生的波频率低,传播较深,因此利用交通荷载产生的表面波能获的更深土层的参数。根据交通荷载的运动特性和三维波动方程,运用解析方法求得了交通荷载作用下瑞利波的特征方程,并对弥散性和荷载运动对波的传播的影响进行了分析,研究发现对于同一运动速度 V,不同频率的波其传播方向不相同。
Rayleigh wave frequency spectrum analysis is one of the most important nondestructive methods for detecting foundation parameters. but the testing depth is shallow. Rayleigh wave generated by traffic can spread farther than the general load, because its wave length is shorter, so we can use it to test deep-seated soils. Analytical method was applied to construct the dispersion secular equation of Rayleigh wave generated by vehicle loads in two-layered ground, the dispersion characteristics of Rayleigh wave in different frequencies and velocity of load are discussed. The results proved Rayleigh wave induced by vehicle loads is different from the Rayleigh wave induced by other load, the spread direction of Rayleigh wave is changed with different frequencies and velocity of load.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第z2期414-417,共4页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.59808011)
关键词
交通荷载
地基
瑞利波
弥散性
vehicle loads
foundation
Rayleigh wave
dispersion characteristics
