Gantry-crane pavements and foundations are significant assets within intermodal facilities. The performance of these pavements, which are subjected to highly-variable loads, is critical to safe operations. Traffic interruptions and costs associated with maintaining and rehabilitating distressed or failed pavements in associated areas are of particular importance. The purpose of this study was to evaluate structural behavior and improve design procedures for gantry crane way pavement used at intermodal facilities by assessing interactions among pavements, subgrades, and operational loading conditions. The performance of the gantry crane pavements and foundations was assessed using a finite-element (FE) model, while pavement structural response to a crane load was measured using strain gages installed in the field. Measuring material properties using in-situ/laboratory tests was not possible in this work due to the limited resources, restricted access to intermodal facilities, and tight schedule of rail freight transport(i.e. tight schedule of cranes). To verify the materials properties and ensure a consistent behavior of the developed FE model with respect to the field measurements, an inverse design approach was implemented. Because of the significant cost of FE simulation, the gradient-based solver used in this study is based on a trust region algorithm. The verified model was used to predict the critical responses of Portland cement concrete (PCC) layer, base course, and subgrade soil. These parameters were then used to conduct a pavement fatigue damage analysis, parametric analyses of material strength and slab geometry were carried out based on Model Code, and resulting fatigue-life recommendations for improved designs were made. The developed FE model along with the inverse approach create a framework that can be used in further health monitoring problems when a specific parameter cannot be directly observed.

龙门起重机的路面和地基是联运设施中的重要资产。这些路面在承受高负载的情况下的性能对于安全操作至关重要。与相关区域维修和修复不良或失败的人行道相关的交通中断和成本尤为重要。这项研究的目的是通过评估人行道，路基和运行荷载条件之间的相互作用，来评估联运设施中使用的龙门吊式人行道的结构性能并改进其设计程序。使用有限元（FE）模型评估龙门起重机路面和地基的性能，同时使用现场安装的应变计测量路面结构对起重机负载的响应。由于资源有限，使用多式联运设施的限制以及铁路货运的时间紧迫（即起重机的时间紧迫），因此无法使用现场/实验室测试来测量材料性能。为了验证材料特性并确保已开发的有限元模型相对于现场测量的一致行为，实施了逆向设计方法。由于有限元仿真的成本很高，因此本研究中使用的基于梯度的求解器基于信任区域算法。验证的模型用于预测波特兰水泥混凝土（PCC）层，基层和路基土壤的临界响应。然后使用这些参数进行路面疲劳损伤分析，根据模型规范对材料强度和平板几何形状进行了参数分析，并提出了改进设计的疲劳寿命建议。所开发的有限元模型与逆方法一起创建了一个框架，当无法直接观察到特定参数时，该框架可用于进一步的健康监控问题。