Study A High Rise Building-Foundation-Soil Interaction On The Lateral Loading

In the past several years,high-rise-buildings are largely built,but tradational method prescribed by current codes has some problems,that is the internal force of structure is different from the practical structure. Moreover, the tradational method could make the designing plan either unsafe or wasted. Therefore, it is no time to delay that refining the design methods of high-rise buildings. The theoretic and practical application of the space structure-foundation-soil's interaction analysis has been a hotspot on civil engineering application. So studying interaction is obviously significant on the structure and foundation design. In order to study the structure's internal force and deformation of the high-rise-building- foundation-soil interaction model on the lateral loading. This paper concretely describes a space-high-rise-building,pile-group-raft-foundation and soil interaction model and proposes a three-dimensional numerical technique for the whole structure analysis. That is to say, high-rise--frame,pile-group-raft-foundation and soil are treated as a single continuous system and an interactive analysis method is presented using finite element method. Firstly, a numerical model by the three dimensions FEM is presented that may be used for the analysis of lateral behavior of pile group on the e-plastical foundation and that may be used for the reflection of pile group effect and pile group load distributing ratio by FEM. The purpose of this model is to compute pile group load distributing ratio by using the numerical method. This paper concretely studies pile group load distributing ratio by changing distance-diameter ratio. Some interesting results, which may be useful in practical design, are obtained. Based on the pile group numerical model, this paper presents a high-rise-building- foundation-soil interaction model on the lateral loading. The modal could not only bear lateral loads but also accept vertical loads. Through computing a given building and analyzing the result by using of the commercial software, ANSYS, this paper concretely studies: ⑴The interactive analysis method studies the upper-structure lateral deformation and frame internal force compared with the tradational method. ⑵Interaction of vertical and lateral load affects the result. ⑶The result is affected by changing pile diameter,raft thickness and foundation modal. By comparing with the tradational method, we can draw some conclusion. Interactive method is more security and economy to design high frame structure. So the result may be useful in practical design.