| In recent years, the number of high-rise buildings keeps increasing, with the impetus of national urbanization and the reserve deficiency of land. Comparing with multi-storied buildings and under the action of earthquake, mass the vertical members of high-rise buildings carried and the value of earthquake force resulted is fairly large because of many stories of high-rise buildings. The high center of gravity of high-rise buildings leads to the big tilting moment. After earthquakes, the difficulty in renovating damaged high-rise buildings exists, and it requires more expenses owing to much construction cost. A building collapsing caused by earthquake endangers its adjoining buildings. The demand of diversity of uses and much people flows requires vast useful areas on some floors. Based on it, emergency level and reinforced level must planned to make the rigid uneven.With the time varies, earthquake is not the horizontal load directly borne on the structure, which changes fast, but the structure's vibration due to ground movement to have the horizontal displacement so that the structure bears force. Therefore, it requires anti-earthquake methods for high-rise buildings. This paper relates to the design methods of anti-earthquake, the theory of dynamic analysis for high-rise building's structure. Some conclusions for reference have been put forward at last when analysis and calculation is worked along with a project application.After calculating and analyzing an application, it demonstrates that torsional vibration mode distributes regularly as long as the arrangement in the plan is symmetric and uniform and on the elevation the mass and the rigid distribute evenly. In addition, the center of structure might have the lower lateral rigidity to form weak level for both ends of the cylindrical shear-wall structure and for the buildings far away. The time travel analysis for infrequent earthquake shows that the structure has the varying reflection based on the different earthquake waves. It is important that the suitable choice of earthquake wave in analyzing time travel for structures is made for the design of high-rise buildings.To subdivide the finite element analysis, the elastoplastic time travel analysis is done within the range of horizontal structural weak layer under the action of earthquake infrequently, which is feasible to find out the location of structural weak layer and breaking-down mechanism and meanwhile givesreference valuable to the design of high-rise buildings.This essay aims at the analysis and research on the framed shear-wall cylindrical structure. Intensive understanding of this kind of structure would provide the basis for the design and benefit for study in the future. |
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