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结合2榀1/2比例的3层单跨钢筋混凝土框架低周反复加载拟静力试验研究,对采用防屈曲偏心支撑加固的钢筋混凝土框架结构抗震性能开展研究。通过与未加固试件的对比,对采用防屈曲偏心支撑加固的钢筋混凝土框架结构的破坏形态、承载能力、变形能力、延性和耗能能力等抗震性能指标进行了深入分析。研究结果表明:经合理设计,防屈曲偏心支撑加固框架可有效实现预期的塑性铰机制,达到了防屈曲支撑先于框架结构屈服的设计目标,与未加固对比试件相比,采用防屈曲偏心支撑加固混凝土框架抗震性能显著提高,防屈曲偏心支撑加固混凝土框架具有良好承载能力、弹塑性变形能力和耗能能力。
Combined with 2 榀 1/2 ratio of 3-story single-span RC frame under cyclic loading test, the seismic behavior of RC frame strengthened with anti-buckling eccentric support was studied. Through the comparison with the unreinforced specimens, the anti-seismic performance indexes such as failure mode, bearing capacity, deformation capacity, ductility and energy dissipation capacity of reinforced concrete frame structure reinforced by anti-buckling eccentric support are deeply analyzed. The results show that the reasonable design of the frame with anti-buckling eccentric support can effectively achieve the desired plastic hinge mechanism, and achieve the design goal of buckling support before yielding of the frame structure. Compared with the un-strengthened comparative sample, the buckling eccentricity The seismic performance of the reinforced concrete frame is significantly improved. The flexural stability of the reinforced concrete frame with anti-buckling support has good bearing capacity, elastic-plastic deformation capacity and energy dissipation capacity.