基于模糊层次分析法的加固RC梁抗弯性能评价

Flexural behavior evaluation based on fuzzy analytic hierarchy process for strengthened RC beams

针对加固后钢筋混凝土梁抗弯性能评价指标多因素和多层次特性的问题,提出了采用模糊层次分析法来评价加固RC梁的抗弯性能.通过对影响因素与权重的确定、抗弯效果等级划分与贴近度的计算,实现了对加固后RC梁抗弯性能的评价,并对10根RC梁抗弯试验中的加固梁进行了分析.结果表明,根据加固前后RC梁的最大贴近度值,分析方法准确划分出了RC梁的抗弯性能等级,可以对各种不同影响因素下RC梁的抗弯性能进行量化分析.

Aiming at the problem that the evaluation indexes for the flexural behavior of strengthened reinforced concrete(RC) beams are characterized of multiple factors and multiple hierarchies, a fuzzy analytic hierarchy process was proposed to evaluate the flexural behavior of strengthened RC beams. By determining the influencing factors and weights, as well as grading the flexural effect and calculating the magnitude of closeness, the evaluation on the flexural behavior of strengthened RC beams was accomplished, and the strengthened beams for the flexural test of 10 RC beams were analyzed. The results prove that the grades of the flexural behavior of RC beams can be classified accurately by this analysis method according to the maximum closeness magnitude of RC beams before and after strengthening, thus it can be used for the quantitative analysis of flexural behavior of the RC beams under various influencing factors.