Application Of Elastic-plastic Analysis To The Design Of Super-High Building Structures

With the rapid development of country economy, more and more super high buildings are being built. Currently, the building scale of super high building in our country is at the forefront of the world. The super high building can provide sufficient and comfort space for using. Because the super high building has multi layers, large area and can contain lots of people, it is very important to evaluate and insure their safety during earthquake. Based on the design experience and research during severe earthquake of one super high building at Zhu Jiang new town of Guangzhou, the researches and analysis methods for the super high structures were carried out.There are two methods to analyze the super high structures during severe earthquake, one is static nonlinear analysis (push-over) method and the other is dynamic nonlinear analysis method. The push-over method is studied extensively at home and abroad. It not only avoids the problem with trivial detail of older dynamic nonlinear analysis method but also gives attention to the nonlinear behavior of the components in a structure. The results of this method are relatively accurate for the structures affected by main vibration modes. Dynamic nonlinear analysis method can define reasonably reaction and damage of the structure during specific strength earthquake, at the same time it can consider the randomness and uncertainty of seismic behavior. Then this behavior during severe earthquake can be estimated.It is described in this paper firstly the development and present situation of static and dynamic elastic-plasticity analysis methods and then their theory background, implementation steps. The scope of application and prospect of development were discussed, and the advantages and disadvantages of static and dynamic elastic-plasticity analysis methods were introduced. Secondly, several kinds of representative static and dynamic elastic-plasticity analysis methods and models were introduced. Lastly, one super high building at Zhu Jiang new town of Guangzhou was taken as an example. Static and dynamic elastic-plasticity analysis methods were used to calculate the seismic response of this super high building during severe earthquake. Shear between floors, capsized moment, overall displacement, displacement between floors and the development of plastic hinges were compared. It is a foundation to provide reasonable measure for earthquake engineering design, and insures the design can meet the requirements of using and safety.