Determination of Road Deflections from Traffic Induced Accelerations

Arraigada, Martín; Partl, Mandfred N.; Angelone, Silvia

doi:10.1080/14680629.2007.9690081

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…Te measured acceleration histories were used as reference values for the optimization of dynamic simulations of the behavior of pavement structures [38,60]. Measured acceleration histories were also converted, by means of double time-integration, into defection histories, see [14,55,[61][62][63][64]. Te defections were then used for back-calculation of layer properties.…”

Section: State-of-the-art Applicationsmentioning

confidence: 99%

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Instrumentation of Field-Testing Sites for Dynamic Characterization of the Temperature-Dependent Stiffness of Pavements and Their Layers

Donev,

Díaz Flores,

Eberhardsteiner

et al. 2023

Structural Control and Health Monitoring

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Falling weight deflectometer (FWD) tests are performed worldwide for assessing the health of pavement structures. Interpretation of FWD-measured surface deflections turns out to be challenging because the behavior of pavement structures is temperature-dependent. In order to investigate the influence of temperature on the overall pavement performance and on the stiffness of individual layers, temperature sensors, asphalt strain gauges, and accelerometers were installed into one rigid (concrete) and two flexible (asphalt) pavement structures, mostly at layer interfaces. Three different methods for installation of the strain gauges are compared. From correspondingly gained experience, it is recommended to install a steel dummy as a place-holder into the surface of hot asphalt layers, immediately after their construction and right before their compaction, and to replace the dummy with the actual sensor right before the installation of the next layer. Concerning the first data obtained from dynamic testing at the field-testing sites, FWD tests performed at different temperatures deliver, as expected, different surface deflections. As for the rigid pavement, sledgehammer strokes onto a metal plate, transmitted to the pavement via a rubber pad, yield accelerometer readings that allow for detection of curling (=temperature-gradient-induced partial loss of contact of the concrete slab from lower layers). In the absence of curling, the here-proposed sledgehammer tests yield accelerometer readings that allow for quantification of the runtime of longitudinal waves through asphalt, cement-stabilized, and unbound layers, such that their stiffness can be quantified using the theory of elastic wave propagation through isotropic media.

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Section: State-of-the-art Applicationsmentioning

confidence: 99%

“…Installing accelerometers at multiple depths during the construction of the pavement represented a novel challenge, difering from the installation at a single depth and after construction as described in [14,38,62,64]. As for the present study, the following two requirements had to be fulflled:…”

Section: Sensor Installationmentioning

confidence: 99%

Instrumentation of Field-Testing Sites for Dynamic Characterization of the Temperature-Dependent Stiffness of Pavements and Their Layers

Donev,

Díaz Flores,

Eberhardsteiner

et al. 2023

Structural Control and Health Monitoring

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“…Arraigada et al [43] has employed the use of high-resolution capacitive accelerometers to determine pavement deflection using numerical double integration in a full scale Circular Pavement Test Track (CPTT). Under normal traffic, pavement and environmental conditions, road deflections are very small [44].…”

Section: Capacitive Accelerometersmentioning

confidence: 99%

Pavement Sensing Systems : Literature Review

Fahad

Nagy

Gosztola

2022

Civil and Environmental Engineering

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In situ monitoring of pavement health has been getting much attention due to the efficiency, reliability and accuracy of data. This review consists of various embedded as well as nondestructive sensing options that have been used to perform analysis on pavement health either by simply calculating horizontal and vertical strains under pavement layers or by crack detection models inside pavement structures by supplementing information from moisture, temperature and traffic related sensors. With optimum integration of such combination sensors, engineers can predict the optimum rehabilitation time of the pavements and reduce a huge amount of budget spent on infrastructure reconstruction.

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“…In this work, acceleration were measured at different point in the pavement structure and stored in a digital file. As described in [7], deflections can be calculated by numerical double integration of the measured acceleration using the following equations:…”

Section: From Acceleration To Deflectionmentioning

confidence: 99%

Evaluation of accelerometers to determine pavement deflections under traffic loads

et al. 2008

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The purpose of this work was to study the use of accelerometers to measure pavement deflections due to traffic loads. To this end, accelerometers were embedded in two sites: the full scale load simulator Circular Test Track (CTT) and the A1 motorway in Switzerland. Deflections were derived from acceleration measurements using an algorithm that double integrates the measured signal and corrects any errors derived from the procedure. In the motorway, deflections were monitored using a set of three magnetostrictive deflectometers. Additionally, the pavement's material viscoelastic parameters determined in the laboratory were incorporated in Finite Element (FE) models to estimate the theoretical deflections. The calculated deflections were then compared to the measured and to the theoretical deflections. Deflections calculated from acceleration showed a reasonable qualitative correlation to those measured by magnetostrictive deflectometers. In addition, the FE models revealed the inability of the accelerometers to measure very slow or quasi-static motion.

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Determination of Road Deflections from Traffic Induced Accelerations

Cited by 8 publications

References 7 publications

Instrumentation of Field-Testing Sites for Dynamic Characterization of the Temperature-Dependent Stiffness of Pavements and Their Layers

Instrumentation of Field-Testing Sites for Dynamic Characterization of the Temperature-Dependent Stiffness of Pavements and Their Layers

Pavement Sensing Systems : Literature Review

Evaluation of accelerometers to determine pavement deflections under traffic loads

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