Abstract
The dynamic soil-structure interaction (SSI) for incident plane SH waves is analyzed for a two-dimensional (2D) model of a shear wall on a rigid foundation by using the indirect boundary element method (IBEM). The rigid foundation utilized in this study is embedded in transversely isotropic (TI) soil layers over bedrock. The accuracy of the IBEM method is verified and analyzed by setting a semicylindrical, rigid foundation-shear wall structure system in the single TI soil layer and multiple TI soil layers over bedrock. This study shows that the TI characteristics of the site have a significant impact on the effective input motion and the superstructure response. In a single soil layer, the increase in the shear modulus ratio in the vertical and horizontal directions has a certain degree of amplified action on the effective input motion and the superstructure response. Simultaneously, the corresponding peak frequency of the response increases. In multiple soil layers, the changes in the effective input motion and the superstructure response are also affected by the TI characteristics of the soil layers, and the impact of this effect is related to the sequence of the layers.
Highlights
Dynamic soil-structure interactions (SSI) under the effect of seismic waves are important problems in the fields of soil dynamics, seismology, and earthquake engineering, because of their particular significance to practical engineering applications
It is clear that a change in the mass of the superstructure will lead to a change in the seismic energy distribution between the foundation and the superstructure
The indirect boundary element method (IBEM) method is applied to study the effective input motion and the response of the shear wall under the incidence of SH waves transmitting into layered transversely isotropic (TI) soil
Summary
Dynamic soil-structure interactions (SSI) under the effect of seismic waves are important problems in the fields of soil dynamics, seismology, and earthquake engineering, because of their particular significance to practical engineering applications. Methods for solving soil-structure interaction problems can be divided into analytical and numerical methods. Analytical methods utilized wave function expansion to obtain the out-of-plane response of a two-dimensional (2D), semicircular, rigid foundation (with a shear wall representing the superstructure) when excited by plane SH waves [1, 2]. Many scholars adopted analytical methods to study dynamic soil-structure interactions, including the dynamic response of the interaction of a structure system with different foundations. The interaction of a soil-structure system under different soil conditions (dry, saturated, etc.) was studied [7,8,9]
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