Rational stiffness of single outrigger trusses in frame-core structure with outriggers

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (15) : 63-70.

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Rational stiffness of single outrigger trusses in frame-core structure with outriggers

LIN Shao-ming, ZHOU Yun, DENG Xue-song, WU Cong-xiao

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Abstract

The characteristic parameters of bending stiffness ratio i, shearing stiffness ratio g of outrigger trusses and bending stiffness ratio p of column were investigated in order to get the simplified calculation formula of structural roof displacement in frame-core structure with outriggers. The relationships among the structural roof displacement, internal forces and i, g, p under uniformly distributed loading and earthquake loading were studied through a 253.2-meter super-rise building using the software ETABS. The results show that i, g, p adopted for optimizing the structural lateral stiffness are reasonable and feasible, and p has the greatest influence on the structural lateral stiffness while the second is g and i has the smallest effect. As for the characteristic parameters,
i should not be bigger than 0.6, g should be 0.9～3.5, and p should be 1.3～4.6.

Key words

frame-core structure with outriggers / lateral stiffness / single outrigger trusses / stiffness ratio limit

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LIN Shao-ming;ZHOU Yun;DENG Xue-song;WU Cong-xiao . Rational stiffness of single outrigger trusses in frame-core structure with outriggers[J]. Journal of Vibration and Shock, 2013, 32(15): 63-70