Selection of optimal traffic control strategy based on large bridge(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年4期
- Page:
- 68-77
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Selection of optimal traffic control strategy based on large bridge
- Author(s):
- ZHOU Bing1; 2; WANG Chuansheng1; LIU Fangliang3
- （1. School of Management and Engineering, Capital University of Economics and Business, Beijing100070, China; 2. China Communications Construction Company, Ltd., Beijing 100088, China;3. CCCC Highway Consultants CO., Ltd., Beijing 100083, China)
- Keywords:
- bridge engineering; large bridge; benefit analysis; optimal control strategy; greedy algorithms
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to obtain the optimal economic benefits of large bridge, a bridge in Nanjing was taken as an example, with the help of massive realtime load data collected, the optimal traffic control strategy was sought on the premise of ensuring the safety of the bridge structure.Firstly, through massive realtime data was acquired by bridge structural health monitoring system, the variation law of vehicle load was statistically combed, and a period of time of vehicle load data for statistical analysis was selected, and a probability distribution model was established to analyze the structural conditions of traffic facilities under quantitative traffic load, thus mining the correlation characteristics between traffic load and structural changes.The model was established to obtain the optimal control strategy. The model focused on several indexes that have the highest correlation with bridge structure and economic benefits: damage to structure, degradation rate of bridge performance, funds needed for bridge damage maintenance, impact on environmental pollution and daily traffic charge value. Five objective functions and a constraint condition of congestion index were established. The weight of each index was calculated by entropy method. The multiobjective problem was converted into a singleobjective problem by linear weighting method. The greedy algorithm was used to find the optimal solution and formulate the optimal control strategy of bridge traffic volume.The strategy should not only ensure sufficient traffic volume and transportation charges, but also consider the safety status and maintenance costs of the bridge, and finally sought to maximize the daily operating income of the bridge. The results show that through realtime data simulation examples, under the premise of severe saturation of traffic load, uncontrolled traffic charge is not the best management decision scheme. Controlling traffic load within a certain range can not only ensure the sustainable operation of the bridge, reduce the risk of irreversible damage to the bridge structure caused by excessive load, reduce the annual maintenance expenses, but also effectively improve the operation efficiency of the bridge and pursue the maximum return on investment. 1 tab, 10 figs, 35 refs.
Last Update: 2020-07-31