| With the growing of our country economy,more and more super high-rise buildings have constructed all over the country. Nowadays, china is one of the countries in the world of the largest number of high-rise buildings in the construction and completion. Super highrise buildings not only Super high-rise building not only has a strong sense of visual impact,but also to provide more space for the use of people. High-rise buildings have enough layers to accommodate more people in the office, once the earthquake happened, especially the rare earthquake, the safety of people’s lives and property will be confronted with a huge threat, so it is worth to research whether high-rise buildings have enough seismic performance and reliable evaluation structure at the time of the earthquake. This paper adopts PKPM software to analysis seismic performance under the conditions of frequent earthquake and rare earthquake for the center of Lanzhou 5A grade office.Firstly, the development course and the present situation of the static and dynamic elastic- plastic analysis methods were made an overview in this paper. And then the theoretical basis and the scope of application of these two analysis methods were introduced,the implementation steps and the development prospects of the two analysis methods were explained in detail, the advantages of and disadvantages of the two analysis methods were compared, some occurred problems were discussed in detail as well as some classic assumptions and analysis models were introduced in this paper. Secondly, this paper take Lanzhou 5A Center Project Office high-rise structure as an example to make seismic elastic analysis and elastic time history analysis of small earthquake whenever suffer the stress and deformation of the structure of frequent earthquake. Finally,in order to provide scientific and reasonable measures for the structure design of high-rise buildings against the earthquake,making the structure can stand the test under rare earthquake and protecting the user’s life and property safety, this paper adopted the static and dynamic elastic-plastic analysis methods to calculate stress and deformation of the high-rise structure under the action of earthquake in Hampshire, and then the important indexes coming from these two kinds of structure inelastic-plastic analysis method were compared as well as the damage situations of structure under seismic action were evaluated in this paper.This research found that the structure of Lanzhou 5A Center buildings was in the elastic state under frequent earthquake, and the structure was intact. Under strong earthquake, the structure components were damaged seriously, but the overall structure did not collapse.According to comparing analysis of the static and dynamic elastic-plastic analysis method,this researched found that the main damage structure appeared at the bottom under the staticelastic-plastic analysis; on the contrast, the main damage structure under the dynamic elastic-plastic analysis appeared at each layer. On the other hand, the distribution results of plastic hinge contained from dynamic elastic-plastic analysis is more closely to the real situation than static elastic-plastic analysis. Overall, the structure satisfied the design concept of "no damage under small earthquakes, small damage under huge earthquakes" under earthquakes. |
