基于PLAXIS3D的地基基礎(chǔ)-上部結(jié)構(gòu)共同作用分析
[Abstract]:Taking a multi-story frame structure as the engineering background, the three-dimensional numerical model including superstructure and foundation is constructed by PLAXIS 3D finite element program, and the function of elastic-plastic analysis embedded in the program is used. Firstly, the finite element model of structure is established by SAP2000, and the same bottom constraint condition is adopted in PLAXIS 3D. The calculation accuracy of internal force analysis of frame structure is verified by comparing the difference of internal force between the two models when considering the self-weight action only, so as to verify the calculation accuracy of the internal force analysis of frame structure by PLAXIS 3D. Then, considering the two working conditions of small earthquake and large earthquake, applying the horizontal seismic force to the structure by quasi-static method, the difference between the structure internal force under the soil-structure interaction and the structure internal force when the interaction is not considered is studied. Finally, in addition to the PLAXIS3D integral model, considering the superstructure as uniform load, the difference of foundation settlement is analyzed. The results show that the stiffness coordination between the foundation and the superstructure can be considered directly by establishing the whole three-dimensional model of soil and structure, so that the internal force and deformation of the structure can be obtained more in line with the actual situation.
【作者單位】: 北京金土木信息技術(shù)有限公司;
【分類號】:TU470
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