利用加强层调节框筒结构核心筒弯矩

Regulation of corewall overturning moment of frame-corewall structure by strengthened storey

高层框架-核心筒结构中的加强层,一方面可以增大结构抗侧刚度、控制结构位移,另一方面还可以调节倾覆弯矩在核心筒和外框之间的分配比例,减小核心筒的倾覆弯矩。首先研究了加强层位置对于核心筒弯矩的影响规律,得出了利用加强层调整核心筒弯矩的基本概念;其次探讨了如何通过给定的核心筒弯矩分布来反推加强层的位置,给出了显式的递推公式。算例表明,这些概念和公式是合理的,对于带加强层的框筒结构的核心筒弯矩调整,具有参考意义。

The strengthened storey in high-rise frame-corewall structure,on one hand,usually plays the role to enhance the structural lateral stiffness and control the structural deformation,and on the other hand,has the function of regulating the distribution of overturning moment between the corewall and the peripheral frame and reduces the overturning moment of the corewall. Firstly,the influence law of the locations of strengthened stories upon overturning moment of corewall was studied to conclude the basic concept of regulating the corewall overturning moment by strengthened storey. Secondly,a series of recurrence formulas were given to determine the locations of strengthened stories by distribution of corewall overturning moment. The calculation results show that the conclusions and formulas are reasonable,providing reference for the regulation of overturning moment of corewall of frame-corewall structures.