Dynamic Elasto-Plastic Time History Analysis Of A Super High-Rise Building

With the continuous development of technology and economy,the structure of the building presents the characteristics of super high,complicated and diversified.The structure is calculated,analyzed and designed by the theory of elasticity,which is difficult to meet the requirements of the current situation.Meanwhile,Performance based seismic design and the destroy characters of high-rise buildings in a earthquake,the dynamic elastic plastic time history analysis is becoming more and more important in the seismic design of building structures.In this paper,the elastic calculation of the K7-3 tower of Wuhan Wanda central culture area was carried out under the earthquake and the elastic plastic calculation under rare earthquake.The results show that the structure is in line with the conceptual design and specification.Firstly,the structure is analyzed by using SATWE and MIDAS,and the calculation results are compared to ensure the rationality of the structure and the arrangement of the components.On this basis,the elastic time history analysis of the structure is carried out,the displacement curve is more uniform,no obvious mutation,in accordance with the requirements of the specification;Secondly,the calculation principle and the different constitutive relations of SAUSAGE which is widely used as finite element software is introduced,and using it to establish an accurate finite element model of K7-3 tower,the plastic damage,base shear curves,the floor displacement and the floor displacement angle of envelope curve is obtained by the elastic-plastic time history analysis under the rare earthquake.At the same time,the comparative analysis of the elastic-plastic and elastic time history curves is carried out,which is more realistic to reflect the change of the plastic damage of the structure and the hysteresis of the elastic time history.Elastic plastic time history analysis is an effective and reliable method for the seismic design of high-rise buildings.For the elastic-plastic time history analysis can reflect real-time damage distribution and plastic damage of components with SAUSAGE finite element software,but also can accurately reveal the weak part under the earthquake and into the process of plastic,in order to better guide the structural seismic design.