STUDY ON THE EFFECT OF EMBEDDED CONDITIONS FOR HIGH-RISE BUILDINGS

The research progress of the seismic effect analysis of basement surrounding soil on high-rise buildings home and abroad was reviewed. Based on the interaction between the tower and, basement and, surrounding soil, a high-rise building analytical model that could consider the influence of foundations was established. The calculation parameters of the soil spring around basement and corresponding damping were determined according to the site conditions. The rationality of the calculation results of four kinds of embedded conditions including basement roof embedded, basement surrounding embedded, foundation embedded and soil-structure interaction under earthquake was investigated, and the influence of the length of one side opening of the tower on the mechanical performance of the overall structure and of the structural members was studied. The analysis results show that the lateral stiffness of the basement roof embedded model is relatively large, and the interaction between basement and tower cannot be considered. The basement surrounding embedded model cannot reflect the structural deformation and the inertial force caused by the basement mass, and the horizontal shear force decreases too fast along the vertical direction of the basement under earthquakes. Therefore, the calculation results are unsafe. The foundation embedded model ignores the effect of the soil around the basement, resulting in an excessive horizontal shear force of basement under earthquakes, and the calculation results are too conservative. The soil-structure interaction model can realistically simulate the stiffness and damping of the soil around the basement, compared with the other calculation models, although the situation of the tower changes little, the internal force of the basement components changes greatly. The single side opening has little influence on the overall mechanical performance of the tower, but the influence on the frame column and slab should be paid attention to.