| With the development of technology and finance, super high-rise buildings regarded the iconic buildings of the cities are more and more popular. According to the latest statistics, among the top ten highest buildings, nine of them are built in Asia and six of them are built in China. So we can predict that China will be the core area of high-rise buildings in the world. By now, more than100buildings higher than250meters have been built in China, and the number will grow in a high rate.Composite structures are now commonly used in super high-rise buildings. They perform better in the aspects of fire resistance and stability. Moreover, they have better ductility than concrete structures. For high-rise buildings, using composite structures not only can enhance the safety of the structure, but also can reduce the cost to a certain extent, thus achieving the unity of the security and economy. However, the theory of composite structures is now not yet mature. Many projects are based on tests and finite-element calculation.Now using the computer to analyze structures has become the main method in civil engineering as the development of finite-element software and some commercial software. Elastic analysis carried on the structures can ensure the load-carrying capacity basically. The elastic-plastic analysis applied on the high-rise building can foresee the inelastic performance under the action of rare earthquakes. However, the design of high-rise buildings should also emphasizes the concept design and analyze the accuracy of the result calculated by computers.This project is a real project in the city of Dalian. It is202.35meters tall with50stories above the ground and a tarmac. It is a RC frame-core tube structure, of which the core tube is consisted of concrete wall and the columns are steel-reinforced concrete columns. In the article, I applied the elastic analysis under small earthquakes and pushover analysis under rare earthquakes on the model to make the structure meet the performance design goals. |
