Comparative study on calculation method for stability of super high-rise building concrete structure
The stiffness-weight ratio is the main parameter affecting the gravity P-Δeffect and the main factor reflecting the overall stability of the structure.The stiffness-weight ratio formula of the high-rise specification is suitable for structures with uniform vertical load distribution along the height.For super high-rise buildings with non-uniform load or complex shape,the calculation of the stiffness-weight ratio formula of the high-rise specification is conservative and flawed.On the basis of discussing the relationship between the stiffness-weight ratio and the critical buckling load factor,a direct finite element buckling analysis method was proposed.The design ideas and discriminant methods of structural stability in different codes were compared,and the main factors affecting the stiffness-weight ratio were studied.The structural stability of four mechanical models of a super high-rise building in Shenzhen was checked.The results show that the critical buckling load factor directly obtained by the finite element buckling analysis method is used as the basis for judging the stability of the super high-rise building structure to meet the safety requirements.
super high-rise structurestructural stabilitycode comparisonstiffness-weight ratiobuckling analysiscritical buckling load factor
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