Circular uniform static load was generally utilised for asphalt pavement design. Software packages mechanics analysis, such as BISAR, were developed based on the cylindrical coordinate system because of symmetry exerted load. However, three important factors ignored by previous computational algorithms, namely non-uniform tire contact pressure, irregular imprint and moving In this paper, analytical solutions elastic viscoelastic multilayered under acting over a rectangular area deduced using...

Asphalt road gradually deteriorates in serviceability with insignificant damage. The deterioration begins microcracks and continues until structural failure. To facilitate early damage prediction, this study proposes a self-sensing technique based on the piezo-resistive behavior of conductive asphalt concrete. end, conventional mixtures were modified into by adding carbon fiber (CF) iron tailings aggregates (TA) as alternatives for natural (NA). response was evaluated correlating fractional...

Traditional models for pavement temperature prediction are either physics-driven or data-driven, which fail to account deviations between physical law and reality, dependent on data size, thereby limiting accuracy. The physics-informed neural network (PINN) was adopted fuse observed temperatures with the law. Initially, heat transfer differential equations asphalt were derived. Subsequently, a hybrid sampling method, two subdomain decomposition modes, boundary initial condition interpolation...

Pavement cracks are common indicators of road distress. Road maintenance agencies must monitor conditions and detect promptly to reduce costs, ensure structural reliability, enhance safety comfort for drivers. crack detection is typically performed using inspection vehicles with human drivers, but this approach inefficient large-scale networks, consuming significant manpower time. Utilising unmanned aerial (UAVs) can save time without disrupting traffic flow. However, images captured by UAVs...

The intelligent measurement-based technology of Fibre Bragg Grating (FBG) sensor was proposed for establishing a wireless sensing network airport asphalt pavement structural information monitoring at Chongqing International Airport. Given the complicated natural environment and aircraft loadings, obtaining key (i.e. dynamic response amplitude, duration distribution, driving offset, speed, etc.) from database is crucial prerequisite to analyse performance. Moving average filter Fast Fourier...

Modulus is a critical parameter for evaluating the bearing capacity and remaining life of pavements. The prevalent modulus back-calculation method by using pavement surface deflections captured from falling weight deflectometer (FWD) could characterize overall However, non-uniqueness issue may occur when identifying each layer perspective mathematics. Alternatively, this paper presents novel application to real-time evaluation based on asphalt health monitoring with built-in sensors. First,...

Strain sensor is a crucial component in pavement response monitoring, and its measuring accuracy vital to the evaluation prediction of performance. However, measurement variability biases are unavoidable nature due inherent granular characteristics asphalt mixture inclusion embedded strain sensor, respectively. In this study, certain amount 4-point bending beams, which were filled with random aggregates mortar utilizing finite element method, constructed represent conventional dense AC-13....

Tourism development in Lijiang, China, has helped lift many people out of poverty but also led to increased pollution and water scarcity, which climate change is predicted exacerbate. A shift towards tourism cash crops reduced the diversity livestock used by agrarian households. These effects are explored two villages between 2008 2013 using a multi-method approach. It found that local governance does not follow any best practice principles outlined international literature. Improved...

Asphalt fine aggregate matrix (FAM) is a predominant component directly related to field performances of hot asphalt mix (HMA), it necessary investigate material properties FAM. Prior preparing FAM specimens, the content was calculated by keeping filler–bitumen (FB) ratio same as in corresponding HMA. A non-destructive fabrication method instead coring and cutting methods developed compact cylinders, joint base designed be concentric with loading axis testing system. Rheological responses...

Recently studies reveal that the viscoelasticity of asphalt layer, transverse isotropy each structure layer and foundation condition pavement are important factors when analysing data from falling weight deflectors. However, these have not been considered in present analytical solutions simultaneously. To fill this gap, wave propagation approach was extended to establish a new solution. It shown could eliminate positive exponential functions matrix only with four elements adopted...

The fractional viscoelastic model has been applied to characterize the viscoelasticity of asphalt concrete (AC), but it rarely is adopted in pavement structure analysis due complicated calculating process. Therefore, simple methods applying models mechanic are proposed. First, based on derived complex modulus expressions typical AC, combined with particle swarm optimization and interior-point algorithm, a novel global algorithm for parameter identification Then, dynamic phase angle data...

Distributed fiber optic sensors (DFOSs) have been effectively used for pavement health monitoring. However, the inhomogeneity of asphalt mixture and characteristics sensor affect measurement accuracy, which in turn affects performance evaluation pavement. In this study, strain nonembedded DFOS specimens was as a reference compared with embedded to analyze accuracy based on four-point bending test. To further improve numerical simulation model established by coupling discrete element method...

The bearing capacity of asphalt pavement gradually deteriorates due to repeated traffic loads. As the crucial mechanical index evaluate capacity, evolution stiffness layers and interfaces is necessary be mastered. This paper proposes a identification method for by using monitoring data from built-in sensors. First, analytical solution multi-layered elastic/viscoelastic medium with imperfect interlayer subjected moving load derived, theoretical relationship between response can obtained....

Asphalt pavements are damaged by traffic load repetitions. Conventionally, the allowed number of repetitions until pavement failure is calculated based on empirical transfer functions from deterministic mechanical responses to performance. However, and damage uncertain under a random realistic temperature. Therefore, non-deterministic problem—that is, probability distributions asphalt performance moving loads temperatures—was investigated in this study. Random factors include pressure,...