Study on a Corrected Method to Calculate Rigidity-Gravity Ratio for Super High-Rise Building

With the huge depth-width ratio and uneven distribution of lateral stiffness and mass, the super highrise building could not meet the premise of rigidity-gravity ratio formula provided by Chinese code “Technical specification for concrete structures of tall building (JGJ3-2010)”, so it’s overall stability has been concerned widely. According to the principle of overall stability which is evaluated by rigidity-gravity ratio, the corrected method to rigidity-gravity ratio was deduced in this paper. The corrected method was used for an engineering example, its result was compared with P-delta effect calculation and buckling analysis, the consistent conclusions were obtained. The researches show that the calculation of rigidity-gravity ratio should consider the influence of actual gravity load and horizontal load distribution forms, the overall stability of super high-rise building should be comprehensively evaluated through the corrected rigidity-gravity ratio checking, P-delta effect calculation and Integral buckling analysis.