Elastic-plastic Time-history Analysis Of A Super High-rise Building Under Rare Earthquakes

In recent years,China has ushered in the rapid construction of high-rise buildings,seismic analysis safety of super high-rise structures has been paid wide attention.The analysis of elastic-plastic response of super tall structures under rare earthquake has great significance to the seismic design.This paper based on general finite element analysis software ABAQUS,introduced the realization methods of elasto-plastic time-history analysis which include the selection of component simulation,material constitutive and integration method.Combined with a transfinite specific engineering,the dynamic response analysis of high-rise structure under severe earthquake model was established.Through the comparison with satwe model provided by the designer,the cycle,vibration mode and quality all show the whole model has satisfied the request of engineering.This article first described the elasto-plastic behavior of the structure in detail when suffering three groups of seismic waves that meet the requirements of the specification and the Ninghe-Tianjin wave,the damaged or yielded state of main structural components was studied,and the degree of damage was evaluated.After that,we input each of three sets of data about seismic waves.The design reference period is 50 years and 100 years as stated in the engineering site response analysis report in order to study the elastic-plastic behavior of the structure.The results are compared before and after.Calculation results indicate that the structural has excellent seismic behaviors when affected by rare earthquakes,structural elastoplastic interlayer displacement angle is less than 1/100,and can achieve the third level seismic fortification object of criterion.