【摘要】 介绍了一种新型耗能钢框架结构支撑——限制屈曲支撑(BRBs),定义了BRBs与钢结构框架的名义抗侧刚度比R,建立了几何计算模型,并采用ANSYS有限元软件对其进行振型分解反应谱法和时程分析计算。然后,对计算结果进行分析,得出了名义抗侧刚度比R的变化对结构抗震性能的影响规律,总结出了多高层建筑刚度比的最佳取值范围。本文结论可为限制屈曲支撑结构设计提供参考依据。更多还原

【Abstract】 A new type of dissipate energy brace is introduced in this paper——buckling-restrained brace( BRBs) ,and lateral stiffness ratio R of the BRBs and the steel frames is defined. The geometry model is framed and computed with finite element analysis by the modal response spectrum method and time-history method. Associating with different R value changes,the frames’ seismic performance is different. The prime values of the ratio to high-rise buildings are given. The conclusion can be considered as references in the design of the buckling-restrained braces.更多还原