Dynamic Interaction Research Of Multi-ribbed Composite Wall Structure-foundation-soil Under Earthquake

Multi-ribbed composite wall structure is a new architectural structure system ofenergy-saving and shock absorption, which meet the demand of wall reform in China.Currently, this structure system has been applied in Shaanxi, Hebei, Henan and someother provinces, and achieved good economic benefit and social benefit. During theapplication of this structure did not consider the multi-ribbed composite wall structure-foundation-soil dynamic interaction, the structure, the ground and the soil is dividedinto three parts, respectively, calculation and analysis, which is not in line with theactual situation. To this end, this paper adopts the method of combining theoreticalanalysis and numerical calculation on the basis of previous research results. For thisnew architecture of the multi-ribbed composite wall structure, summarized the influenceof soil-structure dynamic interaction, analyzed the distribution law of sliding andcontact pressure of foundation, and the main factors affecting multi-ribbed compositewall structure seismic response has carried on the detailed parameter analysis, thedynamic interaction mechanism of this system is revealed. Specifically include thefollowing aspects of this content:(1) In this paper, we simplify the multi-ribbed composite wall structure as theframe-equivalent elastic plate mechanics model of composite materials, using the finite-infinite element coupling method, explores research methods of multi-ribbed compositewall structure-foundation-soil dynamic interaction analysis with the aid of ABAQUSprogram. Through free field seismic response analysis and the soil-foundation dynamicinteraction analysis without consider the inertial interaction, this paper is provedcorrectness and feasibility for the selection of calculation model and analysis method.On this basis, we analyzed the effects of the nonlinear contact to multi-ribbed composite wall structure-foundation-soil dynamic interaction.(2) By comparison with the results of multi-ribbed composite wall structure underrigid ground hypothesis, we analyzed the influence rule of SSI effect on structuraldynamic characteristics and seismic response. By comparison with the results of thefree-field seismic response, we analyzed the influence of SSI effect on foundationmotion and ground motion characteristics. For this new architecture structure system ofthe multi-ribbed composite wall,we summarized the law of the influence of SSI effect.(3) To further understanding of the nonlinear contact characteristics of soil andstructure, we analyzed the distribution law of sliding base and base pressure offoundation. The distribution of sliding peak and contact pressure peak of foundationshow obvious symmetry. They are small in the middle and big in the end.(4) Based on the mechanism of soil-structure dynamic interaction, we analyzed thecomponents for top floor displacement of multi-ribbed composite wall. According to theresults of the analysis, we obtained the proportion of each component of the totaldisplacement in the structure of the top floor under different ground motion intensity,basic translational displacement components, based on the rotation displacementcomponents and structural deformation displacement components.(5) Starting from the related parameters affecting the multi-ribbed composite wallstructure-foundation-soil dynamic interaction, we researched the influence degree ofrelated factors on the multi-ribbed composite wall structure-foundation-soil dynamicinteraction. in the law, accordingly, we put forward some meaningful suggestions onseismic design of multi-ribbed composite wall structure.