Abstract
Asphalt pavement structures in cold regions, which suffer from complicated environmental and geological conditions, such as large temperature difference and frozen soil, are prone to cracking, rutting, and moisture damage. However, most of the existing assessment methodologies focus on the vulnerability of the overall road traffic network, ignoring the impact of regional differences and pavements’ structural performance. To establish a highly targeted vulnerability analysis methodology for cold regional asphalt pavements, the concept of highway vulnerability and the assessment model composed of exposure, fragility, and resilience were proposed in this paper firstly. Meanwhile, the assessment indices and standards for exposure, fragility, and resilience were respectively discussed. Then, the calculation process for each index weight and vulnerability index was proposed based on AHP-fuzzy comprehensive assessment methodology. Consequently, the vulnerability grade of asphalt pavements in cold regions could be determined. Finally, the vulnerability assessment indices and methodology for cold regional asphalt pavements were illustrated and presented, providing a theoretical basis for asphalt pavement performance evaluation and vulnerability assessment serviced under cold regional climate.
Highlights
With the continuous expansion of road network coverage, the environmental and geological conditions along the highway projects are becoming increasingly complex
Summary and conclusion For the vulnerability assessment of asphalt pavements in cold regions, a highly targeted vulnerability analysis methodology and an assessment index system were established in this study
The system could provide a quantitative method of pavement performance assessment through the methodology and vulnerability assessment indices and realize the transformation from qualitative analysis to quantitative risk assessment
Summary
With the continuous expansion of road network coverage, the environmental and geological conditions along the highway projects are becoming increasingly complex. On the basis of the geographic information system (GIS) platform, the disaster vulnerability assessment model was established with the regional highway resilience index, road network density, and the unit area road output as assessment indices [17]. Few studies simulated the performance deterioration law of pavement materials under extreme environmental conditions [22, 23], and proposed relevant pavement material design indices These studies addressed the highway vulnerability assessment to a certain extent. Vulnerability of asphalt pavement In this paper, highway vulnerability refers to the nature of a highway structure, that is, the difficulty of maintaining its serviceability state due to structural damage under harsh environments [24,25,26,27]. V 1⁄4 f ðE; I; RÞ ð1Þ where V is the pavement vulnerability index, E is the exposure, I is the fragility, and R is the resilience
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