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Nonlinear Dynamic Earthquake Analysis of Skyscrapers by ABAQUS

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Due to the limitation of computer capacity and the soften of the material constitution, the nonlinear dynamic earthquake analyses of skyscrapers are not practical in engineer’s desktop, and even in the research area they are still open problems. Utilizing ABAQUS’s unique combination of implicit and explicit technologies and capable of solving large problem efficiently, the author solves the problem elegantly and practically. In the analysis model, all members and shear-walls are modeled by plastic zone model, and large deflection effects are taking into account. Especially, as the shear-walls are divided into element size around 0.7x0.7m, the material and geometry nonlinear buckling behaviors of the shear-walls are modeled almost numerical exact. The main analysis procedures and some key parameters are outlined. The analysis results of some prominent projects in China, such as Shanghai World Financial Center(492m in height), Jinta ( 330m in height) and Guangzhou West Tower(435m in height), are also presented. The analysis results are of great help for the design engineers to study the skyscrapers earthquake performance and therefore design the skyscrapers structure more safety and economically.

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