# Dynamic Response Analysis of Airport Pavement under Impact Loading
## 1 Introduction
The finite element method is used to disaggregate the road surface into multiple small units and solve them by numerical simulation, which can take into account the complex characteristics of the road surface such as material non-linearity and geometric non-linearity that cannot be considered using the traditional elastic laminar theory system, and this further improves the accuracy and reliability of the mechanical response of the road surface [8]. [PERSON] investigated mechanical response and prediction models for airport pavements using 3D finite element software. The study found that the models are ideal for predicting the mechanical response of rigid pavements and can effectively reveal the damage mechanisms of such surfaces [9]. [PERSON] used ABAQUS to construct a finite element model of the concrete road surface of Incheon International Airport. The accuracy and reliability of the HWD was the subject of simulation and analysis by the model, and the results were consistent with the model simulation [10]. [PERSON] constructed a three-dimensional finite element model based on the UTW theory to study the variation in the dimensional thickness of the paving slab and the tensile stress at the bottom of the slab, and proposed quality control criteria for asphalt paving and UTW paving, including the dimensions and thickness of the paving slab and the modulus of elasticity of the material [11]. [PERSON] concluded that the performance of the existing airport pavement was no longer compatible with the development of transport technology. By estimating the number of aircraft at the airport over the next 20 years and the number of equivalent annual take-offs, a three-dimensional finite element model was constructed to perform the response and fatigue analysis of the rigid pavement structure and to calculate the maximum stress, displacement, thermal stress, and fatigue life of the airport pavement slabs over the next 20 years [12]. [PERSON] of the Harbin Institute of Technology obtained the response data of the airport pavement based on sensors, verified the feasibility of the finite element model, and established the coupled field of temperature and mechanics. He proposed the temperature control criteria for the structure of the pavement [13]. To simulate the cracking process of a concrete pavement under impact, [PERSON] developed a large-scale three-dimensional finite element model of the road surface. Comparing the results of core bores, impact tests, and simulations, a road surface impact FEM model was proposed that was highly consistent with the actual situation and accurately simulated the crack and crush process of the concrete road surface under the action of multi-head impact loading [14]. [PERSON] applied finite element analysis and multivariate interpolation to design a wheel impact surface at Shanghai Hongqiao International Airport, and proposed a damage surface design method to determine the cumulative damage factor through the simulation of the load transfer effect, which improved and optimized the existing method for calculating the load-bearing capacity of the rigid road surface at the airport [15]. [PERSON] et al. used LEDFAA and ABAQUS software to carry out pavement dynamics analysis, studied the influence of different landing gear configurations and speeds on pavement performance, and calculated the cumulative damage factor of the pavement. The research shows that the Airbus 340-500/600 has the greatest impact on pavement damage, and the deflection value of the pavement subgrade is the largest when the speed is 5 km/h [16; 17]. In addition, [PERSON] et al. proposed a new method to analyze the bearing capacity of the runway pavement using runway vibration mapping during aircraft taxiing by collecting the response under aircraft loading using acceleration sensors, comparing the measured and calculated fundamental frequencies to correct the finite element model parameters to ensure the accuracy of the bearing capacity of the airport pavement [18].