Shear-Wave Propagation in a Loosely Bonded Inhomogeneous Fiber-Reinforced Stratum under the Influence of Horizontal Initial Stress Growing with Depth

摘要

The current study focused on the propagation behavior of horizontally polarized shear waves (SH wave) in a corrugated fiber-reinforced layer loosely bonded with an isotropic elastic half-space. Both the layer and half-space were assumed to be heterogeneous and acted upon by horizontal initial stresses. The heterogeneity in both the layer and half-space were caused by exponential variation of the elastic parameters and density as a function of depth. The closed form of the dispersion relation was obtained and reduced to the classical Love wave equation as a particular case of the problem. The substantial effects of reinforcement, anisotropy, heterogeneities, corrugation, loosely bonded interface, and initial stresses on the dispersion curve were studied extensively with the aid of graphical illustrations and discussions accomplished by numerical computation. Moreover, a comparative study was performed to meticulously compare the case of presence of reinforcement in the layer (anisotropic case) to the case of reinforced free layer (isotropic case), the heterogeneous case to the homogeneous case, and the case of loosely bonded interface to the case of perfectly bonded planar interface. (C) 2017 American Society of Civil Engineers.