Analysis on torsional displacement ratio of high-rise building structure
The basic concept of torsional displacement ratio of high-rise building structure was discussed.The definition of torsional displacement ratio was accurately defined,and the problems in engineering application were pointed out.Through the analysis of high-rise structures without podium towers and with podium towers,the limitations of the torsional displacement ratio in the current code were revealed,and suggestions for improvement were put forward.The results show that the torsional displacement ratio is insufficient as an index to judge the severity of structural torsion,especially in the case of the bottom of the structure or with podium,which may lead to misjudgment of the influence of structural torsion.Relationship between the torsional displacement ratio and inter-story torsional angle was analyzed,and the infeasibility of directly using the inter-story torsional angle as a control criterion was pointed out.Finally,some improvement suggestions for the torsional design method of structures under horizontal seismic actions were proposed.It is suggested that the torsional capacity of vertical members and floors should be checked in the design to ensure the torsional safety of the structure.
high-rise building structuretorsional displacement ratiointer-story torsional angletorsional resistance design
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