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对14根圆截面木梁先进行静载破坏试验以模拟实际工程受损状态。然后针对木梁受损的特点,分别用玄武岩纤维布采用不同方法加固后再进行静载试验,对木梁自身极限承载力、延性等性能进行了加固前后的对比分析。分析结果表明,玄武岩纤维布粘贴加固技术适合于已损木结构,对改善木梁的承载能力、延性及刚度都有贡献。在保证粘贴质量的前提下,加固效果与对受损特征的认知、玄武岩纤维布的层数、纵环向的配合等影响因素有关。当受损特征认知清楚、纵环向配合得当、玄武岩纤维布粘贴层数增加时,其加固效果随之增加。
The static load failure test of 14 circular cross-section wooden beams is carried out to simulate the actual damaged condition. Then according to the characteristics of wood beam damage, basalt fiber cloth is reinforced by different methods and then subjected to static load test. The ultimate bearing capacity and ductility of wood beam are compared before and after reinforcement. The analysis results show that basalt fiber cloth paste reinforcement technology is suitable for damaged wood structure, to improve the bearing capacity of wood beams, ductility and stiffness contribute. Under the premise of ensuring the quality of the paste, the reinforcement effect is related to the cognition of the damaged features, the number of layers of basalt fiber cloth and the cooperation of the longitudinal and circumferential directions. When the damaged features are well-understood and the vertical ring is properly matched, the reinforcing effect of basalt fiber cloth increases as the number of layers of basalt fiber cloth increases.