Abstract: The development trend towards larger aircraft and more complex load spectra directly links the evaluation accuracy of the load-bearing capacity of airport rigid pavements to flight safety and runway service life. The traditional CAN-PCN method exhibits limitations in aspects such as characterizing the time-varying effects of dynamic loads, nonlinear cumulative damage and the interlayer response of composite pavements. In response, the International Civil Aviation Organization (ICAO) has promulgated the ACR-PCR method based on the fatigue damage mechanism. Through empirical analysis, the key factors influencing the pavement classification rating (PCR) RPC and their mechanisms of action were systematically investigated. Based on layered elastic analysis (LEA) model and the cumulative damage factor (CDF) model, the parametric sensitivity analysis and case validation were conducted on a 4C-grade airport pavement by combining with CAAC-PCR software. The research results indicate that the surface layer thickness and flexural strength exert the most significant influence on RPC. A 10% increase in thickness elevates the RPC by 8%~12%, while an increase in flexural strength from 4.5 MPa to 6.0 MPa results in a remarkable RPC increase of 53%. A critical threshold exists for the reaction modulus of the subgrade top surface, beyond which RPC tends to stabilize. Under the action of the mixed aircraft fleet loading, the contribution rate of wide-bodied aircraft to the critical damage area of the runway surface is as high as 76.8%. This research provides a quantitative basis for the accurate evaluation of the load-bearing capacity of rigid airport pavements, thereby enhancing the scientific nature and engineering applicability of the assessment method.

Key words: highway engineering; airport pavement engineering; ACR-PCR method; stratified elasticity analysis; cumulative damage factor; parameter sensitivity

摘要： 航空器大型化与荷载谱复杂化的发展趋势，使得机场刚性道面承载能力的评价精度直接关系到飞行安全与跑道使用寿命。传统ACN-PCN方法在动态荷载时变效应表征、非线性累积损伤及复合道面层间响应等方面存在局限。鉴于此，国际民航组织颁布了基于疲劳损伤机理的ACR-PCR方法。通过实证分析，系统探讨了道面等级RPC(PCR)的关键影响因素及其作用机制。研究基于分层弹性理论(LEA)与累积损伤因子(CDF)模型，结合CAAC-PCR软件对某4C级机场道面进行参数敏感性分析与案例验证。研究结果表明：① 面层厚度与弯拉强度对RPC影响最为显著，厚度增加10%可使RPC提升8%~12%，弯拉强度从4.5 MPa增至6.0 MPa时，RPC增幅达53%；② 道基顶面反应模量存在临界阈值，超过该值后RPC趋于稳定；③ 在混合机群荷载作用下，宽体机型对道面临界损伤区域的贡献率高达76.8%。该研究为机场刚性道面承载能力的精准评价提供了量化依据，提升了评估方法的科学性与工程适用性。

关键词: 道路工程；机场铺面工程；ACR-PCR方法；分层弹性分析；累积损伤因子；参数敏感性