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以某两层钢筋混凝土工业建筑框架结构为原型,按1∶3的缩尺模型设计了钢筋混凝土框架模型(KJ-1),并对其进行模拟地震作用的水平低周反复荷载作用下的试验;然后对该严重损伤的框架进行碳纤维布加固,对加固后的试件(KJ-1A)再进行同样的试验。对加固前后框架结构的受力性能、裂缝发展、破坏形态、滞回曲线、骨架曲线、位移延性等进行对比分析,研究用碳纤维布加固已严重损伤的混凝土框架结构的抗震性能。试验结果表明,震后严重损伤的混凝土框架结构经碳纤维布加固,其极限承载能力、耗能能力及延性等抗震性能有明显提高,为采用碳纤维布加固补强大震后损伤严重的混凝土结构提供了理论依据。
Taking a two-story reinforced concrete industrial building frame structure as a prototype, a reinforced concrete frame model (KJ-1) was designed according to a 1: 3 scale model and subjected to horizontal low-cycle cyclic loading with simulated seismic action Then, the seriously damaged frame was reinforced with carbon fiber cloth and the same test was carried out on the reinforced test piece (KJ-1A). The mechanical behavior of the frame structure before and after reinforcement, crack development, failure mode, hysteresis curve, skeleton curve and displacement ductility were analyzed comparatively to study the seismic performance of CFRP reinforced concrete frame structure with serious damage. The test results show that the concrete frame structure with serious damage after earthquake is strengthened by carbon fiber cloth, the ultimate bearing capacity, energy dissipation capacity and ductility and other seismic performance are obviously improved. It provides the concrete structure with serious damage after using carbon fiber cloth to reinforce the strong earthquake Theoretical basis.