层状地基分界面及土体参数变化对土体振动响应影响研究

br />In order to study the influence of soil parameters and soil interface on soil vibration response when the hollow trench is on the layered foundation,a two-dimensional finite element analysis model was established by using the Comsol simulation physical field.In the study,the difference in soil vibration response performance of layered foundations with different soil parameters was analyzed,and the results showed that when the depth of the hollow trench reaches near the soil interface of the layered foundation,the vibration intensification phenomenon occurs,and this phenomenon is divided.The influence of the Poisson's ratio and density of the layered soil as well as the modulus of elasticity.Changes in soil parameters will also lead to changes in the vibration response of the soil.Specifically,the greater the density,the greater the vibration response of the soil; while the elastic modulus and Poisson's ratio need to be considered for delamination.The greater the elastic modulus of the lower layer,the greater the vibration response of the soil,and the opposite is the case for the upper layer; the lower the Poisson's ratio of the lower layer,the greater the vibration response of the soil,while the upper layer exhibits Poisson's ratio when the trench depth is less than 0.5 m.The smaller the soil mass,the greater the vibration response,but when the depth is greater than 0.5 m,the resulting acceleration curve shows a staggered state.