交叉形与Y形耗能支撑加固RC框架滞回性能的对比分析

为改善Y形耗能支撑加固RC框架的抗震性能,提出了一种新型的交叉形耗能支撑.基于ABAQUS软件对采用Y形偏心支撑、交叉形耗能支撑加固RC框架进行了非线性有限元分析,并同未加固RC框架进行了对比分析,探讨了交叉形耗能支撑加固RC框架的受力机理、水平承载力、抗侧刚度和耗能能力.研究结果表明：交叉形耗能支撑加固的RC框架在水平承载力、抗侧刚度、耗能能力等方面均优于Y形偏心支撑加固的RC框架.此外,交叉形耗能支撑加固方式对原RC框架损伤小,且施工简便.

Contrastive analysis on hysteretic behavior of RC frames retrofitted with cross shape or Y shape energy-dissipation brace

A new cross shape energy-dissipation braced Reinforced Concrete （RC） frames was proposed in order to improve the seismic behavior of Y shape eccentrically braced RC frames. The nonlinear finite element analysis was applied to the above two RC frames based on ABAQUS software. And the mechanical behavior, lateral strength, stiffness degradation and energy-dissipation capacity of this cross shape braced RC frames were dis- cussed in detail after a comparison between the Y shape eccentrically braced RC fiFames and pure RC frames. The results show that the cross shape energy-dissipation braced RC frames perform better in lateral strength, stiffness degradation and energy-dissipation capacity, and the reinforcement pattern of cross shape energy-dissipation braces has the advantages of small damage to original RC frames, convenient construction and good eco- nomic benefits.