一种基于路网抗震韧性的路段重要度评价方法

An Evaluation Method for Link Importance Based on Seismic Resilience of Road Network

路段韧性重要度评价对于提升路网抗震韧性水平至关重要.以韧性的增加值(RAW)为评价指标,提出了一种基于路网抗震韧性的路段重要度评价方法.借助动态贝叶斯网络(DBN)双向推理能力,以初始DBN为基准,不同时刻路段连通状态为证据,更新路网韧性曲线,计算路网韧性的增加值,评价不同时刻路段韧性重要度,并以青岛市市南区局部路网为实例验证路段重要度评价方法.结果表明:同一时刻不同路段的韧性重要度不同;同一路段的韧性重要度与维修速率成正相关;不同路段的韧性重要度对时间的敏感程度不同.提出的重要度评价方法重新定义并量化了不同时刻路段抗震韧性重要度,识别了韧性重要度较高且对时间较敏感的路段,将有限的维修资源向该部分路段倾斜的震后恢复策略与加固韧性重要度较高路段的震前预防策略能够更有效地提高路网抗震韧性水平.

The evalution of link resilience importance is essential for improving the seismic resilience level of the road network.Using resilience achievement worth(RAW)as evaluation index,an evaluation method of link importance based on seismic resilience of road networks was proposed.With the help of the bidirectional inference ability of dynamic Bayesian network(DBN),taking the initial DBN as the benchmark and the link connectivity at different times as the evidence,the resilience curve of the road network was updated,the RAW was calculated,and the link resilience importance at different times was evaluated.Taking the local road network in Shinan District of Qingdao as an example,the evaluation method of link importance was verified.The results show that the seismic resilience importance varies with each link at the same time.The resilience importance of the same link is positively correlated with maintenance rate.The resilience importance of different links varies in sensitivity to time.The proposed importance evaluation method redefines and quantifies the seismic resilience importance of links at different times,and identifies the links with high resilience importance and sensitivity to time.The post-earthquake recovery strategy that inclines the limited maintenance resources to these links and the pre-earthquake prevention strategy that reinforces the links with higher resilience importance can more efficiently improve the seismic resilience of the road network.