博弈论融合下的在役混凝土梁桥耐久性评估

为合理的解决在役混凝土梁桥耐久性评估问题,提出基于博弈论融合的评估模型。首先,综合考虑桥梁所处地区环境及桥梁本身的特点,构建指标评价体系;其次,在充分考虑指标间影响的基础上,依据DEMATEL-ANP计算主观权重,同时利用DEMATEL法直观展现指标因果关系;然后,利用博弈论的均衡理论,融合主观权重与CRITIC客观权重,再结合未确知测度理论,确定桥梁等级;最后,结合多座在役混凝土桥梁进行验证。结果表明:各桥梁耐久性与实际状况一致,准确度高,且与传统评估模型相比,该模型不仅更为准确,还可充分考虑指标间影响关系并以指标因果关系为后续维修顺序提供依据,使其更贴合实际工程使用要求。

Durability Assessment of In-Service Concrete Girder Bridges under Game Theory Integration

To reasonably solve the durability assessment problem of in-service concrete beam bridges, a game theory-based fusion assessment model is proposed. First, taking into account the regional environment and the characteristics of the bridge itself, an index evaluation system was constructed. Then, based on the full consideration of the impact between indicators, the subjective weights were calculated according to the DEMATEL-ANP method, and the causal relationships between indicators were intuitively shown using the DEMATEL method. Next, the equilibrium theory of game theory was utilized to integrate the subjective weights and CRITIC objective weights, and combined with the uncertainty measure theory, the bridge grade was determined. Finally, the model was verified with multiple in-service concrete bridges. It is demonstrated by the findings that the durability of the bridges aligns with their actual conditions, yielding a high level of accuracy. Additionally, when compared to traditional evaluation models, this model is not only more accurate, but it also takes into consideration the influences among indicators and uses the causal relationships between indicators to offer a basis for the subsequent repair sequence, thereby better adhering to actual engineering requirements.