Characteristics Study Of Intereface Between The Foundation And Basic In Loess Area Of The Static Analysis

Soil-structure interaction problem are Prevalently existing in civil engineering and hydraulic engineering.In recent decades,it has been given great attention as one of the issues in civil engineering.In the soil-structure interaction analysis,because of difference existing in the deformation modulus of the two materials,At the junction of the structure and soil,force and deformation have become very complicated,and we called junction interface.In the actual research we found that interface is not a mere interface of two materials,but the unit with certain thickness.It has a high significance to describe the soil-structure interface's dynamics and statics characteristics for the correct evaluation of soil-structure interaction.Thus, soil-structure interface problem of the study focuses on the unit of soil-structure interaction.There are two major issues existing in soil-structure interaction's study:(1)In the currently documents which researched on the soil-structure characteristics of the static analysis at home and abroad,mainly focused on the research of the average soil-structure study but seldom for special soil- structure,such as loess,expansive soil and soft soil and so on.For the loess-structure interaction studies even have not appeared at the moment;(2) From a large number of research results,it was found that many scholars in the study of soil-structure interaction,are used large size remodeling soil samples,but it runs counter to some practical engineering,such as soil and pile-foundation,soil and the subway tunnel wall interaction studies.In order to simulate soil-structure interaction correctly,the paper takes 30cm×30cm size of the original-soil samples and remodeled-soil samples and uses self-reshaping large-scale Single-Shear-Apparatus to make simple shear test,to research the interaction relationship between the foundation and basic in the loess areas.This paper,drawing on previous research experience,mainly analyses the interaction of the undisturbed-loess with smooth concrete,remodeled-loess smooth concrete and remodeled-loess with rough-concrete surface.To drawing shear stress and shear strain curve of the relationship,the three types of contacts test results will be analyed and compared,to discuss the impact of various factors that mechanical properties,and to determine the thickness of contact element from two sides.Analysis of interface in modular form,given the constitutive model of the interface,and given each parameter solution in constitutive equations.